Wavelength-selective Beamsplitter Patents (Class 359/487.04)
  • Patent number: 11300264
    Abstract: A vehicle lighting system includes a light processing unit, a non-uniform projection unit, a sensing unit, a judgment unit, and an operation unit. The light processing unit is capable of changing an intensity profile of a light beam, and the judgment unit receives an image signal from the sensing unit to determine whether to change the intensity profile of the light beam according to the image signal. When the intensity profile needs to be changed in accordance with the judgment result, the operation unit calculates out a desired intensity profile and outputs a control signal containing information about the desired intensity profile to the light processing unit, and the light processing unit changes the intensity profile of the light beam according to the control signal and sends out the light beam with the desired intensity profile.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: April 12, 2022
    Assignee: YOUNG OPTICS INC.
    Inventor: Jyh-Horng Shyu
  • Patent number: 11231534
    Abstract: To provide a sensor capable of enhancing reliability and image quality. There is provided a solid-state imaging device including a functional element, a spectroscopic element, a semiconductor substrate, and a photoelectric conversion element formed in the semiconductor substrate, in which the spectroscopic element is disposed between the functional element and the photoelectric conversion element, and the functional element corrects incident light to light in a direction substantially perpendicular to the photoelectric conversion element.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: January 25, 2022
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Atsushi Toda
  • Patent number: 10408981
    Abstract: A near-infrared cut filter has a transparent substrate and an optical multilayer film formed on the transparent substrate and including high-refractive index films each having a refractive index at a wavelength of 500 nm in a range of 2.0 to 2.8 and low-refractive index films each having a refractive index at the wavelength of 500 nm of less than 1.6. The multilayer film is formed such that the high-refractive and low-refractive index films are alternately stacked and that the filter has spectral transmittance characteristic for the entire wavelength range of 450 nm to less than 550 nm and part of that wavelength range for incident light having incident angle of 0 degree, and part of wavelength range of 450 nm to less than 550 nm and the entire wavelength range of 450 nm to less than 550 nm for incident light having incident angle of 40 degrees.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: September 10, 2019
    Assignee: AGC Inc.
    Inventors: Akihiko Yoshihara, Takaaki Murakami
  • Patent number: 10344217
    Abstract: The present application relates to a device for regulating the passage of energy from an outside space into an inside space, where the device comprises a switching layer comprising one or more dichroic dyes of a formula (I) or formula (II).
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: July 9, 2019
    Assignee: MERCK PATENT GMBH
    Inventors: Peer Kirsch, Alexander Hahn, Andreas Ruhl, Susann Beck, Junyou Pan, Michael Junge, Andreas Beyer, Ursula Patwal
  • Patent number: 10180238
    Abstract: A lighting device for illuminating an operative field comprises, in an axial lighting dome, a first ring of LEDs at a first color temperature, and a second ring of LEDs at a second color temperature different from said first color temperature, and an annular facetted mirror having semi-reflective facets and arranged about the same axis as said rings of LEDs. Collimation optical systems are provided between each ring of LEDs and the annular facetted mirror having semi-reflective facets. The annular facetted mirror having semi-reflective facets mixes the collimated light beams emitted by the two rings of LEDs coupled to the collimators, and forms first and second collimated resulting mixed light beams having the same intermediate color temperature.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: January 15, 2019
    Assignee: MAQUET SAS
    Inventors: Minh Hong Vu Thi, Cécilia Valteau
  • Patent number: 9968416
    Abstract: Systems, apparatuses, and methods of and for an ophthalmic illumination system are disclosed. In an exemplary implementation, an ophthalmic illumination system includes a collimator having at least one lens. The system includes a first mirror arranged to reflect light towards the collimator. The first mirror is configured for use with a first light source that emits a first light beam having a first parameter. The system includes a second mirror arranged to reflect light towards the collimator. The second mirror is configured for use with a second light source emitting a second light beam having a second parameter that is different than the first parameter. The second mirror is shaped and arranged to cause a reflected portion of the second light beam to have the first parameter. The first mirror and the first light source, and the second mirror and the second light source, are separately usable with the collimator.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: May 15, 2018
    Assignee: NOVARTIS AG
    Inventors: Ronald T. Smith, Alireza Mirsepassi
  • Patent number: 9851576
    Abstract: Polarizing beam splitter plates and systems incorporating such beam splitter plates are described. The polarizing beam splitter plate includes a first substrate and a multilayer optical film reflective polarizer that is disposed on the first substrate. The polarizing beam splitter plate includes a first outermost major surface and an opposing second outermost major surface that makes an angle of less than about 20 degrees with the first outermost major surface. The polarizing beam splitter plate is adapted to reflect an imaged light received from an imager towards a viewer or screen with the reflected imaged light having an effective pixel resolution of less than 12 microns.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 26, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew J. Ouderkirk, Joseph C. Carls
  • Patent number: 9819150
    Abstract: A ring-cavity surface emitting quantum cascade laser (RCSE-QCL) may include a ring-shaped active region having first and second opposing facets. One of the first and second opposing facets may define a radiation emitting facet. The RCSE-QCL may also include a ring-shaped phase shifter aligned with the radiation emitting facet and having a spiraled surface.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: November 14, 2017
    Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Robert E. Peale, Pedro Figueiredo, Andrey V. Muraviev
  • Patent number: 9513485
    Abstract: To produce optical beam splitter cubes, an optically transparent plate is provided with an optically active layer on a cover side. Then, on both cover sides of the plate, a plurality of prism bars are formed by molding an optically transparent material, so that a double prism plate is obtained. The prism bars are arranged on cover sides of the plate projecting roof-like in ridge lines separated from each other by valleys. Each prism bar has the cross section of an isosceles right-angled triangle, complemented by the prism bar lying opposite on the other cover side of the plate to form the cross section of the beam splitter cube. The double prism plate is cut up along the valleys between the prism bars and transverse to the longitudinal direction into segments which in each case form a beam splitter cube.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: December 6, 2016
    Assignee: Schildtec GmbH
    Inventor: Hans-Joachim Freitag
  • Patent number: 9279722
    Abstract: An optical emission spectrometer system includes a light source and a dichroic beam combiner. The light source emits first light in a first direction and second light in a second direction different from the first direction. The dichroic beam combiner receives the first light via a first light path and the second light via a second light path, reflects a portion the first light into an entrance aperture of a light detection and measurement apparatus, and transmits a portion of the second light into the entrance aperture, enabling analysis and measurement of both first and second light characteristics simultaneously. The portion of the first light reflected into the entrance aperture predominately has wavelengths in a first range of wavelengths and the portion of the second light transmitted into the entrance aperture predominately has wavelengths in a second range of wavelengths, different from the first range of wavelengths.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 8, 2016
    Assignee: Agilent Technologies, Inc.
    Inventors: Michael Bolles, Yin Sheng Sun, Lindsay Buck, Glyn Russell
  • Patent number: 9164353
    Abstract: A quantum rod light-emitting display device according to an embodiment of the invention includes a display panel including a first substrate, a second substrate opposite to the first substrate, and a quantum rod layer formed between the first substrate and the second substrate, wherein a plurality of quantum rods are arranged in the quantum rod layer in one direction; and a polarizer disposed on the display panel and including a quarter wave plate (QWP) layer and a polyvinyl alcohol (PVA) layer, wherein the PVA layer transmits only light linearly polarized in a first direction, and wherein the QWP layer is disposed under the PVA layer, and the QWP layer circularly polarizes the light linearly polarized in the first direction or linearly polarizes light reflected by the display panel in a second direction.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: October 20, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Il Jeon, Kyung-Chan Kim, Joong-Pill Park, Moon-Bae Gee, Sung-Hee Cho, Kyung-Kook Jang, Kyung-Seok Jeong
  • Patent number: 8982463
    Abstract: The disclosure generally relates to color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed color combiners include at least two tilted dichroic plates having at least two reflectors configured with light collection optics to combine at least two colors of light.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: March 17, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew J. Ouderkirk, Zhisheng Yun, Xiaohui Cheng
  • Patent number: 8958153
    Abstract: An optical polarizer includes a supporting element and an optical polarizing film supported by the supporting element. The optical polarizing film includes a carbon nanotube film structure and a metallic layer disposed on the carbon nanotube film structure.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: February 17, 2015
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Chen Feng, Kai-Li Jiang, Shou-Shan Fan
  • Publication number: 20140240829
    Abstract: A broadband partial reflector includes a multilayer polymeric optical film having a total number of optical repeating units that monotonically increases in thickness value from a first side to a second side of the multilayer polymeric optical film. A baseline optical repeating unit thickness profile is defined by a first plurality of optical repeating units and having a first average slope, and a first apodized thickness profile of the multilayer polymeric optical film is defined by a second plurality of optical repeating units having a second average slope being at least 5 times greater than the first average slope. The second plurality of optical repeating units define the first side of the multilayer polymeric optical film and join the first plurality of optical repeating units. The second plurality of optical repeating units are in a range from 3-15% of the total number of optical repeating units.
    Type: Application
    Filed: October 17, 2012
    Publication date: August 28, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael F. Weber, Timothy J. Nevitt, John A. Wheatley
  • Publication number: 20140204459
    Abstract: A high efficiency light combination module of projection system includes a cubic polarizing beam splitter prism serving as a main body around which four lens arrays, three retarders, and three optical plates are arranged, which is used in combination with coatings that enables transmission or reflection of specific lights to allow different color lights incident from different directions to be combined as a single illumination light beam and to allow the single illumination light beam so combined to be uniform by the lens arrays to facilitate light collection and projection by a panel and a projection lens arranged behind. A polarization conversion film is set at light outgoing port to transfer the polarization states of the combined single illumination light beam into a specific polarized light for a liquid crystal projection system.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 24, 2014
    Applicants: CYNOSURE PHOTONICS CORP.
    Inventor: Ho Lu
  • Patent number: 8654444
    Abstract: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. In one aspect, the received light inputs are unpolarized, and the combined light output is polarized in a desired state. The optical elements are configured to minimize the passage of light which may be damaging to wavelength-sensitive components in the light combiner. Image projectors using the color combiners can include imaging modules that operate by reflecting or transmitting polarized light.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: February 18, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew J. Ouderkirk, Charles L. Bruzzone, Philip E. Watson, Stephen J. Willett, Dale R. Lutz
  • Patent number: 8602563
    Abstract: A projection image display apparatus includes: a light source; an illumination optical system that uniformly irradiates a surface of an image modulation element serving as a primary image surface with a light beam emitted from the light source; and a projection optical system that enlarges and projects image information on the primary image surface modulated by the image modulation element onto a screen serving as a secondary image surface, and that includes a first optical system that forms an intermediate image from the image information, a single-image second optical system that enlarges and projects the intermediate image to display a single image on the screen, a plural-image second optical system that enlarges and projects the intermediate image to display plural images on the screen, and an optical path switching mechanism that selectively guides a light beam from the first optical system to the single-image or plural-image second optical system.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: December 10, 2013
    Assignee: Sony Corporation
    Inventors: Jun Nishikawa, Hideki Yamamoto, Junichi Iwai
  • Patent number: 8414128
    Abstract: An optical projection device includes a laser engine, a first wave plate and a lens. The laser engine provides light. The first wave plate changes a light phase. The lens focuses light. A projecting method of an optical projection device includes providing a light including a first P polarized light, a first S polarized light, and a second S polarized light, and projecting light through a wave plate on a screen, wherein the wave plate moves in a direction perpendicular to light. A projecting method of an optical projection device includes providing light including a first P polarized light, a first S polarized light, and a second S polarized light, and projecting light through a wave plate on a screen, wherein the wave plate rotates around an axis parallel to a projecting direction of light.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: April 9, 2013
    Assignee: Asia Optical International Ltd.
    Inventor: Chien-Chih Hsiung
  • Publication number: 20130070206
    Abstract: In a laser source module aligning laser beams from laser sources for three colors, red, green, and blue on a single combined beam optical axis, decreasing relative displacements of beam spots of three colors, occurring due to thermal deformation by temperature rise, is achieved by a laser source module including plural laser sources, each incorporating a laser having a laser chip installed on a heat sink and a lens converting a light radiated from the laser into a laser beam, and a beam combining unit aligning the laser beams from the laser sources on a single combined beam optical axis, wherein the lasers in at least two or more ones of the laser sources are arranged so that their laser beams will be decentered toward a same direction on the combined beam optical axis upon displacement of an emission point of the laser chip away from the heat sink.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 21, 2013
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Atsushi KAZAMA, Takeshi NAKAO, Yasuo AMANO
  • Patent number: 8337021
    Abstract: A projection type image display device using, in a projection optical system thereof, a flat mirror, which is easy to design and manufacture, as a projection mirror is provided. The projection optical system is a diagonal projection optical system and includes plural lenses. Among the plural lenses, the one disposed closest to the flat mirror has an effective area, along the vertical direction of an image, through which a light beam passes and which is off an optical axis of the other plurality of lenses, shared by the most lenses so as not to allow light reflected from the projection mirror to return to the projector body. A polarization converter using, for example, a quarter wavelength plate is provided at an output surface of a crossed prism to decrease reflectance differences between differently colored light and to thereby prevent the occurrence of color unevenness.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: December 25, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Nobuyuki Kimura, Koji Hirata, Masahiko Yatsu
  • Publication number: 20120188458
    Abstract: A first dichroic mirror (2a) and a second dichroic mirror (2b) are formed on the bonding surfaces between four right angle prisms (1a-1d) so as to intersect. The first dichroic mirror (2a) transmits, of visible light of P-polarization, at least the light of a specific wavelength band and reflects, of visible light of S-polarization, at least the light of the specific wavelength band. The second dichroic mirror (2b) transmits, of visible light of P-polarization, at least light of the specific wavelength band and transmits, of visible light of S-polarization, at least light of the specific wavelength band. The cutoff wavelengths with respect to S-polarized light of both dichroic mirrors (2a and 2b) are set within ranges of bands other than those of the three primary colors of light.
    Type: Application
    Filed: September 9, 2010
    Publication date: July 26, 2012
    Applicant: NEW CORPOATION
    Inventors: Masao Imai, Goroh Saitoh, Fujio Okumura
  • Patent number: 8170325
    Abstract: An image inspecting device is adapted to inspect the difference value between the locations of first and second images. The image inspecting device includes an image catching unit and a light processing unit. The light processing unit is adapted to project the first and second images on the image catching unit.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: May 1, 2012
    Assignee: Himax Display, Inc.
    Inventor: Shu Mei Tsan
  • Patent number: 8164620
    Abstract: A stereo projection optical system includes an image engine configured for providing light superimposed spatial information, a color selector positioned to receive a light output of the image engine, a transmission-type light modulator positioned to receive an emergent light of the color selector. The color selector is configured for selectively modifying the polarization of the light output according to the wavelength of the light output. The transmission-type light modulator alternates between a dark state and a bright state. From the foregoing, it will be apparent that the stereo projection optical system according to the present invention provides advantages in that its structure can be simplified with the reduction of its size by synthesizing lift and right image signals by displaying the stereoscopic image signal using a single projector.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: April 24, 2012
    Assignee: Hon Hai Precision Idnustry Co., Ltd.
    Inventors: Chien-Wen Hsu, Chia-Hung Kao, Huan-Liang Lo, Sheng-Chung Huang
  • Patent number: 8155424
    Abstract: A coin detecting apparatus has: a light source for emitting a light beam onto either of two surfaces of a coin; a half mirror for splitting the light beam reflected on the surface of the coin into a transmitted light beam and a reflected light beam; a full area sensor for obtaining a full image of the surface of the coin in accordance with one of the transmitted light beam and the reflected light beam; and a regional area sensor for obtaining a partial image of the surface of the coin in accordance with the other one of the transmitted light beam and the reflected light beam. By doing this, it is possible to provide a coin detecting apparatus capable of improving accuracy in coin detection and shortening time therein.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: April 10, 2012
    Assignee: Laurel Precision Machines Co., Ltd.
    Inventor: Masataka Takahashi
  • Publication number: 20120008096
    Abstract: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical element includes light recycling stacks, a polarizing beam splitter, and a color-selective stacked retardation polarizing filter. The polarizing beam splitter includes a first reflective polarizer aligned to a first polarization direction. Each light recycling stack includes a second reflective polarizer aligned to the first polarization direction, and a retarder aligned at 45 degrees to the first polarization direction. The color combiner includes partially reflective light sources coupled to the optical element. Un-polarized light having different colors can enter the color combiner through the light recycling stacks, and combined light of a desired polarization state can exit the color combiner. Light having an undesired polarization state can be recycled to the desired polarization state within the color combiner, so that light utilization efficiency is increased.
    Type: Application
    Filed: December 22, 2008
    Publication date: January 12, 2012
    Inventors: Simon Magarill, Charles L. Bruzzone, Andrew J. Ouderkirk
  • Publication number: 20120008197
    Abstract: The invention relates to a microscope, more particularly to a fluorescence microscope, for the structured illumination microscopy, comprising a microscope light path having an optical axis, including a beam splitter for coupling illumination light into the microscope light path, including an illumination pattern unit disposed, in particular, in the microscope light path for the purpose of generating an illuminated pattern on, or in, a sample to be examined, comprising a rotary device for the purpose of effecting relative rotation about the optical axis between the illumination pattern and the sample to be examined.
    Type: Application
    Filed: July 5, 2011
    Publication date: January 12, 2012
    Inventors: Sebastian Borck, Wolfgang Bathe
  • Publication number: 20110273771
    Abstract: An optical element includes a substrate including a first surface and metal structure group including a plurality of metal structures, the metal structures being arranged on the first surface in a two-dimensionally isolated manner. Light is incident on the metal structure group in an oblique manner with respect to the normal of the first surface from the metal-structure-group side or the substrate side, so that a polarization state of light that passes through the metal structure group and a polarization state of light that is reflected by the metal structure group differ from each other in accordance with a wavelength range.
    Type: Application
    Filed: January 13, 2010
    Publication date: November 10, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Makoto Oigawa, Tomohiro Yamada
  • Publication number: 20110242653
    Abstract: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. In one aspect, the received light inputs are unpolarized, and the combined light output is polarized in a desired state. The optical elements are configured to minimize the passage of light which may be damaging to wavelength-sensitive components in the light combiner. Image projectors using the color combiners can include imaging modules that operate by reflecting or transmitting polarized light.
    Type: Application
    Filed: November 2, 2009
    Publication date: October 6, 2011
    Inventors: Andrew J. Ouderkirk, Charles L. Bruzzone, Philip E. Watson, Stephen J. Willett, Dale R. Lutz
  • Publication number: 20110235175
    Abstract: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. In one aspect, the received light inputs are unpolarized, and the combined light output is polarized in a desired state. In one aspect, the received light inputs are unpolarized, and the combined light output is also unpolarized. The optical elements can be configured to minimize the passage of light which may be damaging to wavelength-sensitive components in the light combiner. Image projectors using the color combiners can include imaging modules that operate by reflecting or transmitting polarized light.
    Type: Application
    Filed: November 18, 2009
    Publication date: September 29, 2011
    Inventors: Yarn Chee Poon, Andrew J. Ouderkirk, Philip E. Watson, Xiaohui Cheng, Zhisheng Yun
  • Patent number: 8023188
    Abstract: In a method of transforming light, an optical film for performing the method and a display device having the optical film, an optical film includes an anisotropic film, an isotropic film, a ?/4 phase difference film and a ?/2 phase difference film. The anisotropic film having a first refractive index with respect to a first ray and a second refractive index with respect to a second ray. A refractive index of the isotropic film is substantially identical to the first refractive index. The ?/4 phase difference film delays wavelengths of the first and second rays by about ?/4. The ?/2 phase difference film delays the wavelength of the second ray by about ?/2.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 20, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Jin-Hyuk Yun, Ho-Min Kang
  • Patent number: 7982952
    Abstract: A polarization component, capable of efficiently reflecting an obliquely transmitted light beam toward a light source without degrading the transmission-polarization property of a perpendicular incident light beam, is provided. A C-plate having an oblique retardation of at least ?/8 with respect to a light beam inclined by at least 30° is disposed between at least two reflective circular polarizer layers whose selective reflection wavelength bands of polarized light overlapping each other. A combination of a reflective linear polarizer and a quarter wavelength plate may be used instead of the reflective circular polarizer. Alternatively, a combination of two reflective linear polarizer layers and two quarter wavelength plate layers (Nz?2) disposed therebetween can provide a similar effect. Further, a combination of two reflective linear polarizer layers and a half wavelength plate (Nz?1.5) disposed therebetween may be used.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: July 19, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Kazutaka Hara, Minoru Miyatake
  • Publication number: 20110149556
    Abstract: An optical body for a display apparatus which can improve brightness of a display apparatus and a display apparatus are provided. The display apparatus includes a light source, a display panel that receives light from the light source and displays an image, and an optical body positioned between the light source and the display panel, wherein the optical body includes an optical layer including a plurality of microfiber yarns having refractive index anisotropy, and pitches of the plurality of microfiber yarns are set based by the wavelength of the light to be transmitted or reflected.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 23, 2011
    Inventors: Dong-Hoon KIM, Jin-Sung Choi, Seung-Mo Kim, Kang-Woo Lee
  • Patent number: 7944612
    Abstract: Described are illumination systems whereby light spectra from multiple LEDs of various colors can be combined and polarized with minimal components, while substantially reducing the losses for the combining and polarizing. The described systems and methods use polarizing beam splitters (PBSs) with retarder stack filters to combine color and split polarization for mixed light beams in one step, and to ultimately align the polarizations of the several colored light beams.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: May 17, 2011
    Assignee: RealD Inc.
    Inventor: Michael G. Robinson
  • Publication number: 20110096395
    Abstract: Polymer fibers are formed with concentric alternating layers of different polymer materials. The layers pairs have cross-sectional thicknesses selected for reflecting light at a selected visible wavelength. A cross-sectional dimension of the core is at least ten times an average of the selected thicknesses of the alternating layers. Some articles formed by the fibers are formed by attaching one fiber to another: the color of the fibers at the point of attachment is different from the colors of the fibers elsewhere. The fibers may be deformed to change its color properties by elongating the cross-section of the polymer fiber along a first cross-sectional axis. In some embodiments, the fibers are polarization sensitive.
    Type: Application
    Filed: March 2, 2009
    Publication date: April 28, 2011
    Inventors: Gregory L Bluem, Joan M. Frankel, David C. Kramlich, Robert L. Brott, Shandon D. Hart, Lynn E. Lorimor, Patrick R. Fleming, William J. Kopecky, Bruce B. Wilson, James M. Jonza