Polarization By Birefringence Patents (Class 359/489.01)
  • Patent number: 10790908
    Abstract: An actuator device can include a plate, an actuator, a connector, and a power unit. The plate can retain a section of an optical fiber at the transmitter end of an optical communication link. The section of the optical fiber can be wrapped in at least a partial loop and held or retained by the plate. The connector can be a mechanical connector that couples the plate to the actuator and enables the plate to move about at least one axis to cause a change in a polarization state of the optical signal carried by the optical fiber. The change in the polarization state is identifiable by a polarized photodetector near a receiver end of the optical communication link. The power unit can provide power to at least the actuator.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: September 29, 2020
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A Wellbrock, Joe J. Thompson
  • Patent number: 10698227
    Abstract: The specification is directed to an apparatus for combining laser beams having a same polarization. The apparatus includes a prism having a prism body and a plurality of surfaces, and a crystal coupled to the prism, the crystal having a crystal body and formed of a birefringent material. The prism is configured to receive two laser beams each having a same input linear polarization, totally internally reflect the first laser beam off one or more of the plurality of surfaces to change the linear polarization of the first beam to an orthogonal polarization, refract the second laser beam, and output the laser beams parallel to each other, and having orthogonal polarizations. The crystal is configured to receive the laser beams from the prism and combine them to form an orthogonally polarized combined laser beam.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: June 30, 2020
    Assignee: CHRISTIE DIGITAL SYSTEMS USA, INC.
    Inventor: Oscar Yeung
  • Patent number: 10684504
    Abstract: Provided is a liquid crystal display device comprising: a light source having a wide color reproduction range; a liquid crystal panel; and a polarizing plate arranged on the visible side of the liquid crystal panel, wherein the polarizing plate comprises a polarizer and a polarizer protecting film; the polarizer protecting film comprises a polyester base film having an in-plane phase difference of 8,000 nm or higher at a wavelength of 550 nm and a primer layer formed on at least one surface of the polyester base film; and a coating layer having a lower refractive index than the primer layer is additionally formed on a surface of the primer layer.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 16, 2020
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin Woo Kim, Yi Eun Kim, Min Jeong Park, Kwang Ho Shin, Ji Hyun Wi, Ji Hyun Hwang
  • Patent number: 10566391
    Abstract: Organic light emitting diode (OLED) displays having an emissive OLED layer and a nanostructured interface configured to reduce variability of color with view angle are described. An optical stack having first and second layers with differing refractive indices includes the nanostructured interface between the first and second layers. The second layer is disposed between the first layer and the emissive OLED layer. The nanostructured interface has a substantially azimuthally symmetric power spectral density (PSD) and a wavenumber-PSD product has a maximum for a wavenumber larger than 6 radians/micrometer times the refractive index of the second layer. For all wavenumbers lower than 6 radians/micrometer times the second refractive index, the wavenumber-PSD product is no more than 0.3 times the maximum.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 18, 2020
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: David G. Freier, Robert L. Brott, Justin P. Meyer
  • Patent number: 10429691
    Abstract: A regional polarization structure, a method for fabricating a regional polarization structure and a liquid crystal display panel are provided. The regional polarization structure includes: a substrate; at least one first carbon nanotube block arranged on a first side of the substrate; and at least one second carbon nanotube block arranged on a second side of the substrate, where the first carbon nanotube block includes multiple carbon nanotubes extended in a first direction, the second carbon nanotube block includes multiple carbon nanotubes extended in a second direction, and the first direction is different from the second direction.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: October 1, 2019
    Assignees: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Sifan Wei, Zhongshou Huang
  • Patent number: 10431706
    Abstract: A photoactive device that includes a photovoltaic device having electrodes and at least one photoactive layer between the electrodes. One or more other layers may be included between the electrodes. The device includes a substrate positioned below the photovoltaic device, and a nanostructure backreflective layer positioned below the substrate such that at least some of the incident light impinging on the photovoltaic device passes through the photovoltaic device and the substrate and is backscattered through the substrate to the photovoltaic device.
    Type: Grant
    Filed: February 9, 2014
    Date of Patent: October 1, 2019
    Assignee: The Regents of the University of Michigan
    Inventors: Peicheng Ku, Nanditha Dissanayake, Brian Roberts
  • Patent number: 10254460
    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: April 9, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Michael Benton Free, Martin B. Wolk, Rolf W. Biernath, Stephen A. Johnson, William W. Merrill, William F. Edmonds, Claire A. Jalbert
  • Patent number: 10126469
    Abstract: Nanostructured material exhibiting a random anisotropic nanostructured surface, and exhibiting an average reflection at 60 degrees off angle less than 1 percent. The nanostructured materials are useful, for example, for optical and optoelectronic devices, displays, solar, light sensors, eye wear, camera lens, and glazing.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: November 13, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ta-Hua Yu, Moses M. David, Abdujabar K. Dire, Albert I. Everaerts, William Blake Kolb, Todd M. Sandman, Shunsuke Suzuki, Scott A. Walker
  • Patent number: 10018762
    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: July 10, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael Benton Free, Martin B. Wolk, Rolf W. Biernath, Stephen A. Johnson, William W. Merrill, William F. Edmonds, Claire A. Jalbert
  • Patent number: 9997122
    Abstract: Provided is an image display device equipped with a see-through display function allowing the background to be seen through. In a liquid crystal display device (100), a transparent plate (170) is attached such that the incidence angle of source light emitted by a backlight source (160) is Brewster's angle ?b, and therefore, the transparent plate (170) reflects S-wave included in the source light, and allows P-wave included in ambient light incident from the back side to be transmitted therethrough and illuminate a liquid crystal panel (150). Thus, when the backlight source (160) is on, the viewer can see an image displayed on the background, whereas when the backlight source (160) is off, only the background can be seen.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: June 12, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenta Fukuoka, Tomoyuki Ishihara
  • Patent number: 9939560
    Abstract: A diffusely reflective optical film includes a blended layer extending from a first to a second zone of the film. The blended layer includes first and second polymer materials separated into distinct first and second phases, respectively. The blended layer may have the same composition and thickness in the first and second zones, but different first and second diffusely reflective characteristics in the first and second zones, respectively. The difference between the first and second diffusely reflective characteristics may not be attributable to any difference in composition or thickness of the layer between the first and second zones. Instead, the difference between the first and second diffusely reflective characteristic may be attributable to a difference in birefringence of the first and/or second polymer materials between the first and second zones. The blend morphology of the blended layer may be substantially the same in the first and second zones.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 10, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventor: William Ward Merrill
  • Patent number: 9864120
    Abstract: A multilayer optical film (130) has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film Heating elements (122) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered regions of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered regions to pattern the film The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: January 9, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael Benton Free, Martin B. Wolk, Rolf W. Biernath, Stephen A. Johnson, William W. Merrill, William F. Edmonds, Claire A. Jalbert
  • Patent number: 9825727
    Abstract: Methods and systems for a polarization immune wavelength division multiplexing demultiplexer are disclosed and may include, in an optoelectronic transceiver having an input coupler, a demultiplexer, and an amplitude scrambler: receiving input optical signals via the input coupler, communicating the input optical signals to the amplitude scrambler via waveguides, configuring the average optical power in each of the waveguides utilizing the amplitude scrambler, and demultiplexing the optical signals utilizing the demultiplexer. The amplitude scrambler may include phase modulators and a coupling section. The phase modulators may include sections of P-N junctions in the two waveguides. The demultiplexer may include a Mach-Zehnder Interferometer. The demultiplexed signals may be received utilizing photodetectors. The input coupler may include a polarization splitting grating coupler.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: November 21, 2017
    Assignee: Luxtera, Inc.
    Inventor: Brian Welch
  • Patent number: 9776384
    Abstract: Inorganic multilayer lamination transfer films, methods of forming these lamination transfer films, and methods of using these lamination transfer films. These inorganic multilayer lamination transfer films can have alternating layers including inorganic nanoparticles, sacrificial materials, and optionally inorganic precursors that can be densified to form an inorganic optical stack. Receptor substrates, such as glass or metal, are laminated to the multilayer lamination transfer films.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: October 3, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Martin B. Wolk, Michael Benton Free, Daniel J. Schmidt, Mark J. Pellerite, Robert F. Kamrath, Stephen A. Johnson, Terry O. Collier, Haefa Mansour
  • Patent number: 9772436
    Abstract: A highly durable polarizing plate and a display device including the same are provided. In the highly durable polarizing plate, sticking agent having different storage modulus are formed on top and bottom surfaces of a ?/4 retardation film. Such a highly durable polarizing plate can be attached to LCDs and OLEDs to realize high-quality screens due to a small change in retardation value under environments for reliability evaluation of heat resistance and wet-heat resistance.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: September 26, 2017
    Assignee: Dongwoo Fine-Chem Co., Ltd.
    Inventors: Eun Ok Lee, Yun Seong Kim
  • Patent number: 9586385
    Abstract: The present disclosure relates to inorganic multilayer lamination transfer films, methods of forming these lamination transfer films and methods of using these lamination transfer films. These inorganic multilayer lamination transfer films can have alternating layers including inorganic nanoparticles, sacrificial materials and optionally inorganic precursors that can be densified to form an inorganic optical stack.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: March 7, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Martin B. Wolk, Michael Benton Free, Daniel J. Schmidt, Mark J. Pellerite, Robert F. Kamrath, Stephen A. Johnson, Terry O. Collier, Haefa Mansour
  • Patent number: 9515735
    Abstract: A device for controlling polarization of an optical fiber and a method of controlling the polarization of an optical fiber using the same are disclosed herein. The device includes optical fiber supports, an optical fiber holder, and an optical fiber curvature changing unit. The optical fiber supports receive an optical fiber, and support both ends of the optical fiber. The optical fiber holder includes an optical fiber guide element that guides the optical fiber, drawn out of the optical fiber supports, through a path. The optical fiber curvature changing unit is located between the optical fiber and the optical fiber guide element, and changes the curvature of the optical fiber by exerting external force onto the optical fiber.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: December 6, 2016
    Assignee: KS PHOTONICS INC.
    Inventor: Young Kie Kim
  • Patent number: 9188784
    Abstract: In order to produce a beam with a zero intensity axial ray or to produce a beam that when focused will produce an image of a doughnut shaped pattern with a zero intensity central point, a beam with a uniform or Gaussian profile is directed to a plurality of transparent plates, arranged in pairs on opposite sides of the beam axis, such that for at least one pair, the plates have a composition and thickness different from each other, and chosen so that the transmitted light has a phase difference of half a wavelength for at least three different wavelengths. An additional plate with a center on the perpendicular of the line connecting the first two plates has a composition and thickness such that the light transmitted through that additional plate has a phase difference of a quarter wavelength with respect to the light transmitted through one of the plates of said first pair of plates, at at least one wavelength.
    Type: Grant
    Filed: March 3, 2013
    Date of Patent: November 17, 2015
    Inventor: Stephen C Baer
  • Patent number: 9097933
    Abstract: A polarizer includes a reflective polarizer main body and an Rth compensation layer. The reflective polarizer main body includes a repetitively laminated structure, the repetitively laminated structure including two layers of different refractive indices repetitively disposed on one another. The Rth phase compensation layer is disposed at one side of the reflective polarizer main body. The Rth phase compensation layer is configured to compensate for a phase difference in an Rth direction.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: August 4, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Boo-Kan Ki, Gwan Young Na, Hee Wook Do, Kwang-Hyun Kim, Dae Won Kim, Teck Soo Kim, Seung Beom Park, Duck Jong Suh, Na Young Shin, Sang-Gu Lee, Ji-Hoon Kim
  • Patent number: 9041882
    Abstract: There is provided an optical laminate which comprises: a polarizing film wherein a thin polarizing layer is laminated on one main surface of a substrate; and an optical element (lens array). The thin polarizing layer has a thickness of 8 ?m or less. The substrate has a thickness of 20 ?m to 80 ?m. The optical element is a pattern retardation plate including a plurality of regions having different slow axis directions.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: May 26, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shunsuke Shutou, Minoru Miyatake
  • Publication number: 20150124319
    Abstract: An apparatus is disclosed for filtering of probe light. The apparatus includes an optical filter comprised of a medium circular birefringence between crossed polarizers. The circular birefringent medium changes the polarization of light of a particular frequency bandwidth. So that after passing through the first polarizer, the polarization of a particular frequency bandwidth probe light is rotated between crossed polarizers so it will be transmitted through the second polarizer. The birefringent medium is constructed from a gaseous substance such as atomic vapor and two pump lasers in resonance with absorption lines of the absorbing substance by the process of two-photon absorption. A magnetic field is utilized in some embodiments that permeates the absorbing substance and separates absorption lines for excited state transitions by the Zeeman effect.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Inventor: Joseph Daniel Vance
  • Patent number: 9019450
    Abstract: An optical compensation film for a liquid crystal display is provided and comprises a liquid crystal layer which is disposed on a substrate and has a plurality of first stripe-structure regions with a first thickness and a plurality of second stripe-structure regions with a second thickness, wherein each of the second stripe-structure regions is contiguous to at least one of the first stripe-structure region and the second thickness is greater than the first thickness. The method for manufacturing the optical compensation film is provided.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: April 28, 2015
    Assignee: Benq Materials Corporation
    Inventors: Meng-Chia Cheng, Lung-Hai Wu, Chen-Kuan Kuo
  • Patent number: 9019612
    Abstract: A wavelength selective switch for selectively switching optical wavelength components of an optical signal uses both LCoS and MEMs switching technologies to improve device performance. Specific performance improvements may include more ports, better spectral performance and isolation, improved dynamic crosstalk, more flexible attenuation options, integrated channel monitoring and compressed switch heights.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: April 28, 2015
    Assignee: Nistica, Inc.
    Inventor: Jefferson Wagener
  • Patent number: 9019607
    Abstract: A reflective film includes a first optical stack that provides a first reflective characteristic and a second optical stack that provides a second reflective characteristic. The optical stacks also have first and second absorptive characteristics that are suitable to absorptively heat the respective stacks upon exposure to light including a write wavelength while maintaining the structural integrity of the stacks. The absorptive heating can change the first and second reflective characteristics to third and fourth reflective characteristics, respectively. A blocking layer that at least partially blocks light of the write wavelength may also be provided between the optical stacks to permit absorptive heating of any selected one of the optical stacks. The reflective characteristics of the optical stacks can thus be independently modified in any desired patterns by appropriate delivery of light beams that include the write wavelength.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 28, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Douglas S. Dunn, Przemyslaw P. Markowicz
  • Patent number: 8988776
    Abstract: A film includes microlayers arranged into optical repeat units. Adjacent microlayers have in-plane refractive index mismatches ?nx, ?ny tailored to provide mirror-like on-axis properties, such that the film has a reflectivity for normally incident light in an extended wavelength band of at least 75% for any polarization. Adjacent microlayers also have a refractive index mismatch ?nz that provides the film with reduced reflectivity R1 and increased transmission for p-polarized light in the extended wavelength band incident on the film in a first plane of incidence at an angle ?oblique, where R1 is no more than half of the minimum of on-axis reflectivity. Further, ?nx and ?ny are different enough so that for light incident on the film in a second plane of incidence orthogonal to the first plane, the film has a reflectivity R2 of at least 75% for such light that is p-polarized and incident at any angle.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: March 24, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Michael F. Weber, Timothy J. Nevitt, Gilles J. Benoit
  • Patent number: 8988777
    Abstract: Provided is a laser irradiation device for use in laser processing, and a laser processing method performed using the same. Provided is a laser irradiation device including: a light source that emits a laser beam; and an irradiation optical system which has one or a plurality of lenses, and is provided for light-guiding and light-converging of the laser beam emitted from the light source to the target substance, in which a birefringent material is used as a material entity of at least one lens of the irradiation optical system. Also provided is a laser processing method. The irradiation optical system may have a beam expander having a first lens that is a concave lens or a convex lens, and a second lens that is a convex lens, in the order along the laser-beam travel direction, the beam expander being configured so as to make the interval between the first lens and the second lens variable, in which a birefringent material may be used as a material entity of the first lens and/or the second lens.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: March 24, 2015
    Assignee: Seishin Trading Co., Ltd.
    Inventor: Toshikazu Kajikawa
  • Publication number: 20150062694
    Abstract: The present invention is related to 6,7-dihydrobenzimidazo[1,2-c]quinazolin-6-one derivatives of the general structural formula (I), the anisotropic optical film based on these derivatives with phase-retarding properties for displays, and method of producing thereof: where X is a carboxylic group COOH, m is 0, 1, 2 or 3; Y is a sulfonic group SO3H, n is 0, 1, 2 or 3; Z is an acid amide group L-NH2; p is 0, 1, 2 or 3; K is a counterion selected from the list comprising H+, NH4+, Na+, K+, Li+, Mg2+, Ca2+, Zn2+, and Al3+; s is the number of counterions providing neutral state of the molecule; R is a substituent selected from the list comprising CH3, C2H5, NO2, Cl, Br, F, CF3, CN, OH, OCH3, OC2H5, OCOCH3, OCN, SCN, NH2, and NHCOCH3; w is 0, 1, 2, 3 or 4; and R1 is a substituent selected from the list comprising H, CH3, C2H5, C3H7, i-C3H7, CH2CH2CH2CH3, CH(CH3)CH2CH3, CH2CH(CH3)CH3 and C(CH3)3 and L is a linking group.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 5, 2015
    Applicant: CRYSOPTIX KK
    Inventors: Tatyana Doutova, Pavel I. Lazarev, Elena N. Sidorenko
  • Publication number: 20150022784
    Abstract: An optical element of the present invention has a first dielectric layer, a second dielectric layer and a first metal layer arranged between the first dielectric layer and the second dielectric layer, and is characterized that the first dielectric layer has different refractive indices in a first direction, and a second direction intersecting with the first direction.
    Type: Application
    Filed: March 4, 2013
    Publication date: January 22, 2015
    Applicant: NEC CORPORATION
    Inventors: Shin Tominaga, Masao Imai, Masanao Natsumeda
  • Publication number: 20150017589
    Abstract: The invention relates to an illumination system of a microlithographic projection exposure apparatus comprising (a) a plurality of channels, each channel guiding a partial beam and at least one channel comprising at least one defect, and (b) at least one optical element arranged within the at least one channel having the at least one defect, the optical element being adapted to at least partially compensate the at least one defect of the partial beam of the channel.
    Type: Application
    Filed: August 22, 2014
    Publication date: January 15, 2015
    Inventors: Ingo Saenger, Frank Schlesener
  • Patent number: 8917448
    Abstract: A reflective film includes microlayers arranged into optical repeat units to reflect light in an extended wavelength band, with thinner and thicker ones of the optical repeat units being disposed generally towards a thin side and thick side, respectively, of the film. The microlayers are tailored to provide the film with a reflectivity, for p-polarized light incident in a first plane, that decreases by at least half from an initial value at normal incidence to a value R1 at an incidence angle ?oblique. The film has a reflectivity for p-polarized light incident in a second plane of R2 at the angle ?oblique, where R2>R1. A polarizer is combined with the reflective film, the combination defining an oblique transmission lobe, and the thick and thin sides of the reflective film are oriented relative to the polarizer to reduce an azimuthal width ?? of the transmission lobe.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: December 23, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Michael F. Weber, Gilles J. Benoit
  • Publication number: 20140362332
    Abstract: A birefringent device, which is configured to be mounted in an optical path of an optical system, has an effective area in a pupil plane. The birefringent device affects different polarization states differently and position-dependently. The birefringent device realizes a first pupil function assigned to a first polarization state and a second different pupil function assigned to a second polarization state. The pupil functions may be optimized to achieve various specific optical properties like extended depth of field.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Applicant: Sony Corporation
    Inventors: Daniel Buehler, Markus Kamm, Marco Hering
  • Patent number: 8879151
    Abstract: A reflective film includes interior layers arranged to selectively reflect light by constructive or destructive interference, the layers extending from a first zone to a second zone of the film. The film has a first thickness and the interior layers provide a first reflective characteristic in the first zone; the film has a second thickness and the interior layers provide a second reflective characteristic in the second zone. The difference between the first and second reflective characteristics is not substantially attributable to any difference between the first and second thicknesses, which difference may be zero. Rather, the difference in the reflective characteristics is substantially attributable to reduced birefringence of at least some of the interior layers in one zone relative to the other zone. The film may also incorporate absorbing agents to assist in the manufacture or processing of the film. Related methods and articles are also disclosed.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: November 4, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Douglas S. Dunn, Travis L. Potts
  • Publication number: 20140320952
    Abstract: A head-up display device operated in a vehicle comprises: a first image source disposed under the windshield of the vehicle, which emits a first polarized image light having a first polarization; a light path combining component in front of the first image source, which is for that the first polarized image light firstly goes to the light path combining component and only lets the first polarized image light be through and then the image light goes to the windshield, part of the image light is reflected by the windshield to a driver's eyes; and a second image source inside the vehicle, which emits a second polarized image light having a second polarization and then the image light directly goes to or reflects at least one time to the combining component, continuously to the windshield, and the second polarized image light is partially reflected by the windshield to the eyes.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Applicant: National Tsing Hua University
    Inventor: Cheng-Huan Chen
  • Patent number: 8854730
    Abstract: Presently described are multilayer optical films, oriented polyester films, negatively birefringent copolyester polymers, fluorene monomers, and polyester polymers prepared from such fluorene monomers. In one embodiment, the multilayer optical film comprises at least one first birefringent optical layer; and at least one second optical layer having a lower birefringence than the first optical layer; wherein at least one of the optical layers comprises a negatively birefringent polyester polymer comprising a backbone and repeat units comprising at least one pendent aromatic group that is conformationally locked relative to the backbone.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: October 7, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Lei Wang, David T. Yust, George W. Griesgraber, Stephen A. Johnson, David S. Hays
  • Patent number: 8837870
    Abstract: A fiber laser device includes a laser source that can emit a source laser beam, a birefringent beam separator configured to receive the source laser beam and to split the source laser beam into an o ray and an e ray which have mutually orthogonal polarizations, and a polarization maintaining fiber comprising a fiber core characterized by a core diameter, wherein after the o ray and the e ray exit birefringent beam separator, the o ray and the e ray are separated by a distance that is larger than the fiber core of the polarization maintaining fiber. The polarization maintaining fiber is positioned to couple one of the o ray and the e ray into the fiber core. The one of the o ray and the e ray transmits through the polarization maintaining fiber to form an output laser beam.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: September 16, 2014
    Assignee: Photop Technologies, Inc.
    Inventors: Zhenyu Wang, Shaofeng Zhang, Dashan Li
  • Publication number: 20140254013
    Abstract: An optical member for transmitting or reflecting light is provided. The optical member includes a base member that transmits or reflects light; and a double rainbow film attached on the base member. Preferably, the double rainbow film has an in-plane phase difference in a range of 8,000 nm to 11,000 nm. When the optical member is used together with a display device, there is little color shift before and during wearing sunglasses and a rainbow-like stain which appears in a conventional display device when wearing sunglasses with a polarizing function may be suppressed.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 11, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Sil-Kyu LIM
  • Publication number: 20140247413
    Abstract: The present invention provides a method for improving visibility of an image display device which is capable of providing an image display device excellent in anti-reflection properties and bright-field contrast even using an optical layered body including a light-transmitting substrate having in-plane birefringence, such as a polyester film. The method of the present invention is a method for improving visibility of an image display device that has an optical layered body including a light-transmitting substrate having in-plane birefringence and an optical functional layer disposed on one surface of the substrate. The method includes the step of disposing the optical layered body such that the slow axis showing a greater refractive index of the light-transmitting substrate is in parallel with the vertical direction of a display screen of the image display device.
    Type: Application
    Filed: May 12, 2014
    Publication date: September 4, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takashi KURODA, Makoto HONDA
  • Publication number: 20140247414
    Abstract: The present invention provides a method for improving visibility of an image display device which is capable of providing an image display device excellent in anti-reflection properties and bright-field contrast even using an optical layered body including a light-transmitting substrate having in-plane birefringence, such as a polyester film. The method of the present invention is a method for improving visibility of an image display device that has an optical layered body including a light-transmitting substrate having in-plane birefringence and an optical functional layer disposed on one surface of the substrate. The method includes the step of disposing the optical layered body such that the slow axis showing a greater refractive index of the light-transmitting substrate is in parallel with the vertical direction of a display screen of the image display device.
    Type: Application
    Filed: May 12, 2014
    Publication date: September 4, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takashi KURODA, Makoto HONDA
  • Patent number: 8817374
    Abstract: A birefringent diffuser includes a first optical material and a first birefringent material. The first optical material and the first birefringent material are combined to form a planar layer. The planar layer has an internal pattern of the materials presenting a substantially uniform index of refraction for incident light which is substantially normal to the planar layer and exhibiting a varying index of refraction for at least a portion of light which is trapped in guided modes.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: August 26, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Stephen Kitson, Adrian Geisow, Christopher Newton
  • Patent number: 8817373
    Abstract: An end face of a polarization plate cut by laser becomes a substantially flat surface having only sloping micro waviness because of having been melted once to be solidified. Since the surface has few stress-concentrated parts that may cause microcracks, this prevents microcracks from easily being produced.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: August 26, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Kanto Kobayashi, Kanji Nishida, Naoki Tomoguchi, Youichirou Sugino, Takaichi Amano, Kazuo Kitada
  • Publication number: 20140227482
    Abstract: There is provided an optical laminate excellent in adhesiveness between a (meth)acrylic resin film (base material film) having low moisture permeability and a UV absorbing ability and a hard coat layer, and has suppressed interference unevenness. An optical laminate according to an embodiment of the present invention includes: a base material layer formed of a (meth)acrylic resin film; a hard coat layer formed by applying a composition for forming a hard coat layer to the (meth)acrylic resin film; and a penetration layer formed through penetration of the composition for forming a hard coat layer into the (meth)acrylic resin film, the penetration layer being placed between the base material layer and the hard coat layer, wherein the penetration layer has a thickness of 1.2 ?m or more.
    Type: Application
    Filed: April 18, 2012
    Publication date: August 14, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shusaku Shibata, Katsunori Takada, Hiroyuki Takemoto
  • Publication number: 20140211310
    Abstract: The present invention provides a method for improving visibility of an image display device which is capable of providing an image display device excellent in anti-reflection properties and bright-field contrast even using an optical layered body including a light-transmitting substrate having in-plane birefringence, such as a polyester film. The method of the present invention is a method for improving visibility of an image display device that has an optical layered body including a light-transmitting substrate having in-plane birefringence and an optical functional layer disposed on one surface of the substrate. The method includes the step of disposing the optical layered body such that the slow axis showing a greater refractive index of the light-transmitting substrate is in parallel with the vertical direction of a display screen of the image display device.
    Type: Application
    Filed: May 21, 2013
    Publication date: July 31, 2014
    Inventors: Takashi Kuroda, Makoto Honda
  • Patent number: 8792165
    Abstract: A reflective film includes interior layers that selectively reflect light by constructive or destructive interference, the layers extending from a first to a second zone of the film. The interior layers include a first set of layers composed of a first material and a second set of layers composed of a different second material. The first and second sets of layers are both birefringent in the first zone, but at least some of the layers have reduced birefringence in the second zone. The reduced birefringence produces a second reflective characteristic in the second zone that differs from a first reflective characteristic in the first zone, this difference not being substantially attributable to any thickness difference between the first and second zones. The film may also incorporate absorbing agents to assist in the manufacture or processing of the film.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: July 29, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: William Ward Merrill, Douglas S. Dunn, Stephen A. Johnson, David T. Yust
  • Publication number: 20140184994
    Abstract: The present invention provides a method for improving visibility of an image display device which is capable of providing an image display device excellent in anti-reflection properties and bright-field contrast even using an optical layered body including a light-transmitting substrate having in-plane birefringence, such as a polyester film. The method of the present invention is a method for improving visibility of an image display device that has an optical layered body including a light-transmitting substrate having in-plane birefringence and an optical functional layer disposed on one surface of the substrate. The method includes the step of disposing the optical layered body such that the slow axis showing a greater refractive index of the light-transmitting substrate is in parallel with the vertical direction of a display screen of the image display device.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takashi KURODA, Makoto HONDA
  • Publication number: 20140185139
    Abstract: An optical apparatus, comprising a polarization beam splitter (PBS) comprising a birefringent crystal having a front-end and a back-end, and an optical rotator positioned on the back-end of the birefringent crystal. Included is an optical apparatus comprising a PBS comprising a birefringent crystal and an optical rotator, wherein the PBS is configured to receive a multiplexed optical signal comprising a first polarized optical signal and a second polarized optical signal, wherein the second polarized optical signal is orthogonal to the first polarized optical signal, separate the first polarized optical signal from the second polarized optical signal using the birefringent crystal, and rotate the second polarized optical signal using the optical rotator such that the rotated second polarized optical signal is parallel to the first polarized optical signal. The PBS may further comprise only one lens, wherein the lens is positioned on the front-end of the birefringent crystal.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: Futurewei Technologies, Inc.
    Inventors: Rongsheng Miao, Tongqing Wang, Changzheng Su, Xueyan Zheng, Yu Sheng Bai
  • Patent number: 8767297
    Abstract: An optical film includes at the least one retardation film and at least one isotropic layer made of an isotropic material, wherein the difference in average refractive index between the retardation film and the isotropic layer is at least 0.1 or more. Also, the method of adjusting wavelength dispersion characteristics of an optical film includes: stacking an isotropic layer onto a retardation film. A method for preparing optical film having a variety of wavelength dispersion characteristics by the simple method of coating the retardation film with the isotropic layer.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: July 1, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Seung Hun Chae, Belyaev Sergey, Byoung Kun Jeon, Moon Soo Park
  • Publication number: 20140168544
    Abstract: In relation to a sheet having linearly polarized light eliminating function that is disposed on the viewing side of a polarizing film and eliminates linearly polarized light that has traversed the polarizing plate, proposed is a novel sheet having linearly polarized light eliminating function, allowing a layer having linearly polarized light eliminating function to be thinned, and furthermore, allowing manipulability when pasting the sheet to be satisfactory. Proposed is a transparent double-sided adhesive sheet provided with a adhesive layer on both front and back sides and provided with a layer having a linearly polarized-light-eliminating function (referred to as “linearly polarized-light-eliminating functional layer”) as a middle layer, and the thickness of the linearly polarized-light-eliminating functional layer being within the range of 1 ?m to 40 ?m and smaller than the thickness of the adhesive layer on either the front or the back or the adhesive layers on both front and back sides.
    Type: Application
    Filed: June 27, 2012
    Publication date: June 19, 2014
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventor: Kahoru Niimi
  • Patent number: 8755116
    Abstract: In an optical assembly having a light source which provides two optically different light components with essentially planar wavefronts on an optical axis, wherein the light components differ at least in their wavelength; in the case of an objective lens which projects the two optically different light components into a projection space; and in the case of an optical component which is arranged on the optical axis and has an plane through which the wavefronts of the two light components pass and in which at least two different areas of the optical component with different dispersion behaviors n(?) abut against one another in the lateral direction with respect to the optical axis; the optical component causes phase shifts of the wavefronts of the two light components, wherein the phase shift of the wavefronts of the one light component differs by at least one quarter of the wavelength of that light component between the two different areas, and wherein the phase shift of the wavefronts of the other light compo
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: June 17, 2014
    Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
    Inventors: Lars Kastrup, Volker Westphal
  • Publication number: 20140071379
    Abstract: The purpose of the present invention is to provide a polarizing plate protective film and liquid crystal display device comprising same whereby the generation of egg-shaped blur in a liquid crystal display device (especially an IPS liquid crystal display device) can still be limited even under high-temperature/high-humidity conditions. For this polarizing plate protective film, if nx is the refractive index in the X-axis direction at which the birefringence in the film surface reaches a maximum and ny is the refractive index in the Y-axis direction orthogonal to the X-axis direction in the film surface, then the birefringence under stress (nx?ny) of the film as measured at a wavelength of 589 nm when any tensile stress 5-35 MPa is applied in the X-axis direction or Y-axis direction of the film under 50 DEG C, 80% RH conditions is 0.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Applicant: KONICA MINOLTA, INC.
    Inventors: Naoki TAKAHASHI, Takashi TAKEBE, Satoshi MORII, Kazuki AKASAKA, Nobuo KUBO
  • Patent number: 8657448
    Abstract: A polarization separating element is configured to include a translucent substrate formed of a crystal material having birefringent properties and optically rotatory power and a polarization separating portion formed on the incidence-side surface of the translucent substrate so as to transmit a P-polarized light beam and reflect an S-polarized light beam. A reflecting element that reflects the S-polarized light beam reflected by the polarization separating portion is disposed so as to be separated approximately in parallel to the translucent substrate. A predetermined function is set such that the P-polarized light beam having passed through the polarization separating portion and been incident to the translucent substrate is converted so as to be parallel to the polarization plane of the S-polarized light beam so that the P-polarized light beam is output as the S-polarized light beam.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: February 25, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Shuho Kobayashi, Mitsuru Miyabara, Makoto Sakurai