Post Scanning Optical Element Patents (Class 359/205.1)
  • Patent number: 10663716
    Abstract: An optical apparatus is provided. The apparatus comprises a rotatable reflecting member including a first reflecting surface and a second reflecting surface, an optical system configured to sequentially reflect, by a plurality of reflecting surfaces included therein, light reflected by the first reflecting surface and cause the light to be incident on the second reflecting surface, and an adjusting device configured to change a rotation angle of the reflecting member to adjust an optical path of light that is reflected by the second reflecting surface and exits the second reflecting surface.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: May 26, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Masaharu Kume
  • Patent number: 10659743
    Abstract: An image projection device includes: a first mirror oscillating to scan an image light beam forming an image projected onto a retina of a user; a light source emitting the image light beam and a detection light beam to the first mirror at different timings; a second mirror having a first region reflecting the image light beam reflected by the first mirror to the retina and a second region reflecting the detection light beam reflected by the first mirror in a direction different from a direction in which the image light beam is reflected, and scanning neither the image light beam nor the detection light beam reflected by the first mirror; a detector detecting the detection light beam reflected by the second region; and a controller adjusting oscillation of the first mirror and an emission timing of the image light beam based on a detection result by the detector.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: May 19, 2020
    Assignees: QD LASER, INC., THE UNIVERSITY OF TOKYO
    Inventors: Yasuhiko Arakawa, Mitsuru Sugawara, Makoto Suzuki, Shuichi Tojo
  • Patent number: 10598340
    Abstract: An LED lamp light distribution system and illumination system, the illumination system comprises an LED lamp light distribution system, and at least one illuminated surface. The LED lamp light distribution system comprises an LED chip, a lens, and a light reflecting device. The lens comprises a lens optical axis, a light source setting groove, and an exit surface. The light source setting groove comprises a first contour line, and the exit surface comprises a first exit surface contour line. The first contour line and the first exit surface contour line complete the convergence of the emergent light of the LED chip toward the lens optical axis. The light source setting groove comprises a second contour line, the exit surface comprises a second exit surface contour line, and the second contour line and the second exit surface contour line complete the diffusion of the emergent light of the LED chip away from the lens optical axis.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: March 24, 2020
    Assignee: Self Electronics Co., Ltd.
    Inventors: Fawei Zhang, Bozhang Xu, Zuping He
  • Patent number: 10423047
    Abstract: A method of delivering a beam of laser-radiation to a workpiece for processing the workpiece comprises transmitting the beam twice through an inactive acousto-optic modulator (AOM) crystal in opposite zero-order directions of the AOM at separate locations on the AOM crystal, before delivering the beam to the workpiece. When laser-radiation is to be blocked from reaching the workpiece, the AOM is activated.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: September 24, 2019
    Assignee: Coherent, Inc.
    Inventor: Michael Alexander Bellos
  • Patent number: 10415796
    Abstract: A projector comprises an arc lamp (110) with a parabolic reflector (111) in front of this a double concave lens (114) and then a pair of convex concave lenses (170, 172) to enable the projector to emit a highly collimated beam.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: September 17, 2019
    Inventor: Leonard Henry Friedland
  • Patent number: 10317674
    Abstract: The present disclosure describes Augmented Reality (AR) methods and systems allowing one or more user to observe a virtual image (e.g., computer generated image) overlaid on a physical scene (e.g., actual real life surroundings). Embodiments herein allow components of the AR methods and systems to be decoupled from each other, such that a user is able to view a virtual image overlaid on a physical scene while simply wearing thin, lightweight holographic spectacles.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: June 11, 2019
    Assignee: City University of Hong Kong
    Inventor: Wai Ming Peter Tsang
  • Patent number: 10197239
    Abstract: The present invention relates to an illumination apparatus (100) comprising a light engine (3) and a first lampshade (1) for accommodating the light engine (3), wherein the first lampshade (1) has a first expansion coefficient, wherein the illumination apparatus (100) further comprises a second lampshade (2) for accommodating the first lampshade (1), wherein the second lampshade (2) has a second expansion coefficient smaller than the first expansion coefficient, and is configured such that the changes in size or shape of the first lampshade (1) can be restrained under a high temperature.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: February 5, 2019
    Assignee: LEDVANCE GMBH
    Inventors: Jun Liu, Qihui Zhang
  • Patent number: 10191146
    Abstract: The present disclosure relates to optical systems, specifically light detection and ranging (LIDAR) systems. An example optical system includes a laser light source operable to emit laser light along a first axis and a mirror element with a plurality of reflective surfaces. The mirror element is configured to rotate about a second axis. The plurality of reflective surfaces is disposed about the second axis. The mirror element and the laser light source are coupled to a base structure, which is configured to rotate about a third axis. While the rotational angle of the mirror element is within an angular range, the emitted laser light interacts with both a first reflective surface and a second reflective surface of the plurality of reflective surfaces and is reflected into the environment by the first and second reflective surfaces.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: January 29, 2019
    Assignee: Waymo LLC
    Inventors: Blaise Gassend, Pierre-Yves Droz, Benjamin T. Ingram
  • Patent number: 10185242
    Abstract: There is a demand for an inexpensive optical scanning apparatus. An optical scanning apparatus includes a light source configured to emit a laser light flux, a deflection unit configured to deflect the laser light flux emitted from the light source, and a light reception member configured in such a manner that the laser light flux reflected by the deflection unit is incident thereon. The light source emits the laser light flux tilted by a predetermined angle with respect to a horizontal direction toward the deflection unit. The light reception member is disposed above or below the light source, and the laser light flux reflected by the deflection unit and tilted by the predetermined angle with respect to the horizontal direction is incident on the light reception member.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Nagatoshi
  • Patent number: 10114289
    Abstract: The invention is directed at an exposure head for use in an exposure apparatus for illuminating a surface, the exposure head comprising one or more radiative sources for providing one or more beams, an optical scanning unit arranged for receiving the one or more beams and for directing the beams towards the surface for impinging each of the beams on an impingement spot, a rotation actuating unit connected to the optical scanning unit for at least partially rotating the optical scanning unit, wherein the impingement spots of the one or more beams are scanned across the surface by said at least partial rotation of the optical scanning unit, wherein the optical scanning unit comprises a transmissive element including one or more facets for receiving the one or more beams and for outputting the beams after conveying thereof through the transmissive element, for displacing the beams upon said rotation of the transmissive element for enabling the scanning of the impingement spots.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: October 30, 2018
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Jacobus Hubertus Theodoor Jamar, Herman Hendrikus Maalderink, Erwin Rinaldo Meinders, Peter Theodorus Maria Giesen, Erwin John van Zwet, Henri Jacques Antoine Jean Starmans
  • Patent number: 10110866
    Abstract: The embodiments described herein provide scanning laser devices that include an output optic configured to reduce image distortion. Specifically, the output optic is configured to reduce the distortions that could otherwise occur at relatively short projection distances, while also providing good image quality at relatively long projection distances. In general, the output optic includes a prism having a first surface, a second surface, and a third surface. The prism is configured such that the laser light interacts with each of these three surfaces while being transmitted through the prism and outputted to the display surface. The first, second, and third surfaces are each formed to have a freeform rotationally asymmetric shape, and these freeform rotationally asymmetric shapes are configured to work together to correct distortion in projected images.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: October 23, 2018
    Assignee: Microvision, Inc.
    Inventors: Matthieu Saracco, Roeland Collet, Alga Lloyd Nothern, III, Nenad Nestorovic, Jack H. Schmidt
  • Patent number: 9874330
    Abstract: Disclosed herein a light projection device and a head lamp for vehicle capable of highly increasing and decreasing the illuminance of a plurality of specific regions in a light distribution designed in advance with high degree of freedom. The light projection device includes: a first optical system that forms a second light radiation region; a dynamic light deflection unit configured to deflect a light beam involved in forming the second light radiation region; a second optical system configured to project the deflected light beam to form a third light radiation region; and a deflection pattern generation unit configured to deflect and output each ray of the light beam such that a direction of deflection to be imparted is dependent on a position at which each ray is incident on the light incident portion.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: January 23, 2018
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Mikio Shimizu, Masashi Okamoto, Akihiko Sugitani
  • Patent number: 9867536
    Abstract: Optical coherence tomography systems for imaging a whole eye are provided including a sample arm including focal optics that are configured to rapidly switch between at least two scanning modes in less than about 1.0 second.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: January 16, 2018
    Assignee: Bioptigen, Inc.
    Inventors: Joseph A. Izatt, Eric L. Buckland, Bradley A. Bower, Robert H. Hart
  • Patent number: 9851568
    Abstract: A retinal display projection device comprising a micro-projection component (2) arranged for projecting an image directly onto the retina of a user wearing the device, characterized in that said micro-projection component is arranged for projecting an image outside of the normal field of view of said user.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 26, 2017
    Assignee: Logitech Europe S.A.
    Inventor: Olivier Theytaz
  • Patent number: 9817233
    Abstract: The image display device (100) provides images perceivable from the area of the eye box (E), and includes a light source unit (110), a screen (140), a scanning unit (130) and an optical system (155). The screen (140) has a single micro lens array (1) on which multiple micro lenses (3) are arranged. The scanning unit (130) includes a mirror (130a) to reflect beams emitted from the light source unit (110), and swings the mirror (130a) around a pivot center (130c) to scan the beams thereover, thereby generating images. The optical system (155) brings the images formed on the screen (140) to the eye box (E). An angle (?out) formed between a zero-order diffracted beam and a first-order diffracted beam, which are among a luminous flux of beams diffracted by the screen (140) and pass through the center of the eye box (E), is smaller than a minimum visual angle (Vmin).
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: November 14, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nozomi Nakagawa, Hironori Nakahara, Tomo Kishigami, Nobuo Takeshita
  • Patent number: 9621756
    Abstract: An optical scanning device includes a light source that emits light, a deflector that deflects and scans the light emitted from the light source in a main scanning direction, a housing, a synchronization detection sensor, and a sensor board. The synchronization detection sensor is mounted in the housing, detects scanning light from the deflector, and outputs a write timing reference signal of image data. The sensor board is mounted with the synchronization detection sensor. The aforementioned sensor board is formed with a light transmitting hole for allowing a part of the scanning light to pass therethrough when an incident position of the scanning light for a light receiving surface coincides with a center position of the aforementioned light receiving surface in a sub-scanning direction on an extension line of a center line of the light receiving surface of the aforementioned synchronization detection sensor in the sub-scanning direction.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: April 11, 2017
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Ryotaro Todokoro
  • Patent number: 9588402
    Abstract: A lighting apparatus for film, television, video capture, motion picture and photography which includes a Fresnel lens fixed in a housing which contains a tight array of high power LEDs. The LED panel or board is mated to a heat dissipating apparatus to provide active cooling and together forming an LED engine. The LED engine is mounted to a slider allowing the LED engine to be adjusted within the housing with respect to the lens. Light shaping diffusion may be included on the housing. A power supply unit may also be included in the housing. When in electrical communication, the LED engine and power supply unit function as an integrated self-contained lighting apparatus. Optionally, the power supply may have an integrated dimmer switch, and may be capable of receiving PFC power or have an integrated battery unit.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: March 7, 2017
    Assignee: LITEPANELS, LTD
    Inventors: Kevin C. Baxter, Fred H. Holmes, Ken Fisher
  • Patent number: 9400376
    Abstract: A Z-axis focusing mechanism having a scanner and a prism whose front and rear faces are not normal to the direction of travel of a light beam prior to the light beam impinging upon the front face of the scanner. The scanner and the prism are oriented with respect to one another such that when a light beam is scanned onto the front face of the prism, a scanned beam having varying Z-axis focus points at distinct lateral locations exits the rear face of the scanner. Alternatively, the rear face of the prism may be normal to the light beam as it passes through the prism, which generates a retro-reflected, scanned light beam that exits the front of the prism.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 26, 2016
    Inventors: William L. Vogt, Michael J. Szulczewski
  • Patent number: 9259150
    Abstract: Optical coherence tomography systems for imaging a whole eye are provided including a sample arm including focal optics that are configured to rapidly switch between at least two scanning modes in less than about 1.0 second.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: February 16, 2016
    Assignee: Bioptigen, Inc.
    Inventors: Joseph A. Izatt, Eric L. Buckland, Bradley A. Bower, Robert H. Hart
  • Patent number: 9239462
    Abstract: A head mounted image display device includes: a frame including a front section having a nose pad; a light transmitter supported by the front section and allowing visible light to pass therethrough; an optical scanner that receives signal light modulated according to an image signal and made incident thereon and that two-dimensionally scans the incident signal light toward the light transmitter; a half mirror on a surface on which the signal light from the optical scanner is incident and having a curved surface that reflects the signal light; and a condensing lens on an optical axis between the optical scanner and the half mirror and condensing the signal light from the optical scanner between the optical scanner and the half mirror to convert the signal light reflected by the half mirror into parallel light.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: January 19, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Takeda, Yasushi Mizoguchi
  • Patent number: 9176322
    Abstract: A light scanning device include a housing and an f? lens. The housing includes a bottom plate and a sidewall disposed upright at the bottom plate. The rotating polyhedron and the f? lens are each installed at the bottom plate of the housing. The rotating polyhedron is configured to deflect and scan light beam. Light beam deflected and scanned by the rotating polyhedron transmits the f? lens. The bottom plate of the housing includes a stepped portion at a part corresponding to a peripheral area of the f? lens. The stepped portion is formed lower than a top surface of the bottom plate. The stepped portion has a ridge line in a concavo-convex shape.
    Type: Grant
    Filed: September 27, 2014
    Date of Patent: November 3, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Ryoutarou Todokoro
  • Patent number: 9116458
    Abstract: A light scanning device of the invention includes a scan deflection range of each of the light fluxes deflected by the deflecting part in a scan period of the scan object with the respective light fluxes is divided into a first deflection range where a reflection angle of each of the light fluxes with respect to the deflecting part is small and a second deflection range where the reflection angle is large. A polarization direction of each of the light fluxes is set such that a reflectivity of the reflective mirror when each of the light fluxes deflected in the second deflection range is reflected becomes larger than a reflectivity of the reflective mirror when each of the light fluxes deflected in the first deflection range is reflected.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: August 25, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nobuhiro Shirai, Takaharu Motoyama
  • Patent number: 9042024
    Abstract: The method includes the steps of: obtaining lateral magnification of an optical scanning system; obtaining the maximum value of thickness in the optical axis direction of an scanner lens; obtaining allowance b on one side and beam diameter a in the vertical scanning direction in the lens; and obtaining width h in the vertical scanning direction of the lens by the following expression h=a+2b. The allowance b is a product of the maximum value of thickness in the optical axis direction of the lens and a coefficient, and the coefficient is determined according to the lateral magnification of the system in such a way that the maximum value of movement of the focal point of the lens due to moisture absorption is made smaller than or equal to a predetermined value.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: May 26, 2015
    Assignee: NALUX CO., LTD.
    Inventors: Tomohito Kuwagaito, Yosuke Sakohira, Daisuke Seki
  • Publication number: 20150094599
    Abstract: A varifocal-type optical scanning probe including an optical fiber scanner and a varifocal lens is provided. The varifocal lens includes: a first membrane lens comprising a first lens surface with a variable curvature and a first pressure surface configured to induce a curvature variation of the first lens surface; a second membrane lens including a second lens surface with a variable curvature and a second pressure surface configured to induce a curvature variation of the second lens surface; a first pressure member disposed to apply a pressure to the first pressure surface; a second pressure member disposed to apply a pressure to the second pressure surface; and a motor configured to transmit a driving force to at least one of the first pressure member and the second pressure member.
    Type: Application
    Filed: July 30, 2014
    Publication date: April 2, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woon-bae KIM, Seung-wan LEE, Eun-sung LEE, Min-seog CHOI
  • Publication number: 20150062585
    Abstract: Apparatus and methods for optical scanning, including an optical probe capable of motion for optical scanning with respect to both the interior and the exterior of a scanned object, the optical probe also including light conducting apparatus disposed so as to conduct scan illumination from a source of scan illumination through the probe; light reflecting apparatus disposed so as to project scan illumination radially away from a longitudinal axis of the probe with at least some of the scan illumination projected onto the scanned object; optical line forming apparatus disposed so as to project scan illumination as a line of scan illumination with at least some of the scan illumination projected onto the scanned object; and a lens disposed so as to conduct, through the probe to an optical sensor, scan illumination reflected from the scanned object.
    Type: Application
    Filed: December 2, 2013
    Publication date: March 5, 2015
    Applicant: UNITED SCIENCES, LLC
    Inventors: Keith A. Blanton, KAROL HATZILIAS, STEFAN T. POSEY, WESS ERIC SHARPE
  • Publication number: 20150049373
    Abstract: An optical scanning apparatus capable of fixing an optical member using a plate spring without forming a die cut hole and thus having high dust-proof performance includes a mirror supporting portion supporting a reflection mirror, and a projecting portion configured to form a gap between the reflection mirror supported on the mirror supporting portion and itself, and to deform the plate spring with the reflection mirror, and the projecting portion is provided with a cut hole for engaging the plate spring.
    Type: Application
    Filed: November 3, 2014
    Publication date: February 19, 2015
    Inventors: Yasuaki Otoguro, Takehiro Ishidate
  • Publication number: 20150035930
    Abstract: A light scanning apparatus includes a light source, a deflector configured to deflect a light flux from the light source, and an imaging optical system configured to guide the light flux deflected at the deflector onto a scanned surface. The imaging optical system consists of a single imaging optical element, wherein, on the optical axis of the imaging optical system, the conditions 0.15?T2/Sk?0.3 and 0.03?d/K?0.08 are satisfied. A condition 0.3?B?0.6 is satisfied at a condensing position Y where a scanning angle ? is greatest, when the condensing position Y in the main scanning direction on the scanned surface of the light flux deflected at the scanning angle ? by the deflector is expressed by Y=(K/B)×tan(B×?).
    Type: Application
    Filed: July 30, 2014
    Publication date: February 5, 2015
    Inventors: Kazuyuki Ishihara, Yuichi Tomioka, Shuichi Kurokawa
  • Publication number: 20150009550
    Abstract: An image display apparatus includes a light source unit, a scanning mirror unit that reflects and raster scans a light beam from the light source unit, a light source drive unit that drives the light source unit based on input image data, a microlens array that is arranged on an optical path between the light source unit and an eye of a user, and an optical sensor configured to detect the presence or absence of the microlens array. When the optical sensor fails to detect the presence of the microlens array, drive of the optical source is stopped.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 8, 2015
    Inventors: Chikara MISAGO, Jun SASAKI
  • Publication number: 20150002594
    Abstract: A light scanning apparatus, including: a light source; a deflector configured to deflect the light beam from the light source to scan a photosensitive member; an optical member configured to guide the light beam; a housing including a housing engaging portion and a supporting portion configured to support the optical member; a leaf spring including a pressing portion and a leaf spring engaging portion; and an abutment portion, wherein, in a process in which the housing engaging portion and the leaf spring engaging portion are moved from a second state in which the leaf spring engaging portion is not engaged with the housing engaging portion to a first state in which the leaf spring engaging portion is engaged with the housing engaging portion, the pressing portion is moved from the abutment portion to the optical member.
    Type: Application
    Filed: June 20, 2014
    Publication date: January 1, 2015
    Inventors: Takehiro Ishidate, Yasuaki Otoguro, Juichi Kawano
  • Publication number: 20140354950
    Abstract: Optical coherence tomography (OCT) imaging systems are provided including a source of broadband optical radiation coupled to a sample arm of the OCT imaging system; a beam shaping optical assembly in the sample arm, the beam shaping optical assembly being configured to receive optical radiation from the source as a beam of optical radiation and to shape the spatial profile of the beam of optical radiation; a scan mirror assembly coupled to the beam shaping optical assembly; and objective lens assembly coupled to the beam shaping optical assembly. The beam shaping optical assembly includes a lens assembly configured to change a NA of the OCT system without changing a focus; to change a focus of the OCT system without changing a NA of the system; or to change both the NA and the focus of the OCT system responsive to a control input.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 4, 2014
    Inventors: Eric L. Buckland, Andrew Murnan, Nestor O. Farmiga, Robert H. Hart, Christopher Saxer
  • Publication number: 20140340691
    Abstract: An integrated optical assembly is provided, with enhancements that are particularly useful when the integrated optical assembly forms part of a laser radar system. The integrated optical assembly produces a reference beam that is related to the optical characteristics of a scanning reflector, or to changes in position or orientation of the scanning reflector relative to a source. Thus, if the scanning reflector orientation were to shift from its intended orientation (due e.g. to thermal expansion) or if characteristics of the scanning reflector (e.g. the index of refraction of the scanning reflector) were to change on account of temperature changes, the reference beam can be used to provide data that can be used to account for such changes. In addition, if the scanning reflector were to be positioned in an orientation other than the orientation desired, the reference beam can be used in identifying and correcting that positioning.
    Type: Application
    Filed: December 23, 2012
    Publication date: November 20, 2014
    Inventor: Daniel Gene Smith
  • Patent number: 8873124
    Abstract: A plastic optical element for focusing light to a target includes a first lens and a second lens. The first lens includes an incident surface, a projection surface opposite the incident surface, and a non-optical surface through which light does not pass and that includes a non-transfer portion. At least one light beam passes from the incident surface to the projection surface. The second lens includes an incident surface, a projection surface opposite the incident surface, and a non-optical surface through which light does not pass and that includes a non-transfer portion disposed opposite the non-optical surface of the first lens. At least one light beam passes from the incident surface to the projection surface. The non-transfer portions of the first lens and the second lens are portions on which no surface is transferred from a surface of a mold used to form the plastic optical element.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Go Takahashi, Eiichi Hayashi, Akio Hirano, Takamichi Ohta, Kan Aoki
  • Publication number: 20140267529
    Abstract: An optical scanning apparatus capable of fixing an optical member using a plate spring without forming a die cut hole and thus having high dust-proof performance includes a mirror supporting portion supporting a reflection mirror, and a projecting portion configured to form a gap between the reflection mirror supported on the mirror supporting portion and itself, and to deform the plate spring with the reflection mirror, and the projecting portion is provided with a cut hole for engaging the plate spring.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 18, 2014
    Inventors: Yasuaki Otoguro, Takehiro Ishidate
  • Publication number: 20140253994
    Abstract: A beam brush includes one lens fixed for receiving a laser beam propagating along a first beam axis, a retroreflector positioned for redirecting the laser beam onto a second beam axis through a change in beam path length, and a second lens transmitting the redirected beam. The retroreflector is rotatable about an offset axis and has its angle of rotation controlled for affecting a change in beam path length. The angle of rotation resulting in the path length change is selected for providing a focus or divergence of the reflected beam transmitted through the second lens. Such a system is useful as a Z-axis focusing device operable an X-Y scanner located downstream the modified beam.
    Type: Application
    Filed: February 18, 2014
    Publication date: September 11, 2014
    Inventor: William R. Benner, JR.
  • Patent number: 8810880
    Abstract: An optical scan unit (10) is configured to include a light source (11), a divergent light conversion element (12) having such positive power as to convert divergent light from the light source (11) into convergent light to form a spot on a projection plane, an optical deflector (13) deflecting a light beam from the divergent light conversion element (12) to a first scan direction and a second scan direction which is orthogonal to the first scan direction, and a deflection angle conversion element 14 (14) having such negative power as to convert a deflection angle of the light deflected by the optical deflector (13).
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: August 19, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukiko Hamano, Hiroshi Akiyama, Yoshitaka Takahashi
  • Patent number: 8807766
    Abstract: A laser scanning projection apparatus includes an illumination unit, a projection surface, a scanning mirror, a projection window, an optical sensor, and a controlling unit. The projection window includes a transmissible part and a blocking part. A reflection-differential pattern is formed on the blocking part. When the laser beam reflected by the scanning mirror is projected on the transmissible part, the laser beam is transmitted through the transmissible part and projected on the projection surface. When the laser beam reflected by the scanning mirror is projected on the reflection-differential pattern, a reflective beam with different intensities is reflected by the reflection-differential pattern. The controlling unit calculates a phase difference between an actual projection position and a predetermined projection position of the laser beam according to the sensing signal, and compensating a subsequent image frame according to the phase difference.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: August 19, 2014
    Assignee: Lite-On Technology Corporation
    Inventor: Chen Chun Hung
  • Publication number: 20140219683
    Abstract: A surface-emitting laser device includes a transparent dielectric layer provided in an emitting region and configured to cause a reflectance at a peripheral part to be different from a reflectance at a central part in the emitting region. In the surface-emitting laser device, the thickness of a contact layer is different between a region having a relatively high reflectance and a region having a relatively low reflectance in the emitting region. The contact layer is provided on the high refractive index layer of an upper multilayer film reflecting mirror, and the total optical thickness of the high refractive index layer and the contact layer in the region having the relatively low reflectance is deviated from an odd number multiple of a one quarter oscillation wavelength of laser light emitted from the emitting region.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kazuhiro Harasaka, Shunichi Sato, Masahiro Hayashi, Akihiro Itoh, Katsunari Hanaoka
  • Publication number: 20140218722
    Abstract: An optical inspector includes a radiating source, a time varying beam reflector, a telecentric scan lens, a first and second lens, a field stop, and a detector. The radiating source irradiates a first position of on the time varying beam reflector with a source beam. The time varying beam reflector directs the source beam to the telecentric scan lens, which in turn directs the source beam to a sample. The first lens focuses scattered radiation from the sample to generate multiple scan lines at a first focal plane. The field stop is positioned at the first focal plane to block one or more scan lines at the first focal plane. The scan line not blocked by the field stop propagates to the second lens. The second lens de-scans the scan line and generates a point of scattered radiation at a second focal plane where the detector input is located.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 7, 2014
    Applicant: Zeta Instruments, Inc.
    Inventors: Steven W. Meeks, Rusmin Kudinar, Hung P. Nguyen
  • Patent number: 8797622
    Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM in a main scanning direction, a diffractive power ?dS in a sub-scanning direction, a refractive power ?nM in the main scanning direction, and a refractive power ?nS in the sub-scanning direction. A ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-30 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(3.532×107)Z2+3023Z+0.7010, B(Z)=(5.719×107)Z2+4169Z+0.7678, C(Z)=(1.727×107)Z2+3244Z+0.4217, D(Z)=(1.373×108)Z2+3232Z+1.224, g1(fi)=fi{D(Z)?B(Z)}/20?0.5D(Z)+1.5B(Z), g2(fi)=fi{C(Z)?D(Z)}/20?0.5C(Z)+1.5A(Z), and a ratio ?nS/?dS in the sub-scanning direction satisfies: ?nS/?dS<1.3.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: August 5, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Hidetaka Hoshino, Yoshifumi Nakamura, Hitoshi Fujino
  • Publication number: 20140211288
    Abstract: An optical scanner includes a polygonal mirror; a mirror for reflecting the beam from the polygonal mirror; an optical box having a cap and containing the mirror;a first mirror regulating portion in a direction of a normal line of the mirror, the first regulating portion being provided opposed to such a surface of the reflecting surface and a back surface as is closer to the cap; and a second mirror regulating portion in a beam sub-scanning direction, the second regulating portion being provided opposed to such a surface of the mirror as is closer to the cap; wherein the mirror has a plurality of apex lines, and the first regulating portion and the second regulating portion are disposed at positions which are remoter from the cap than the apex line that is closest to the cap, with respect to a direction perpendicular to a main scan direction.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Applicant: Canon Kabushiki Kaisha
    Inventors: Mitsuhiro Ohta, Akihiro Fukutomi, Tomoyuki Kawano
  • Patent number: 8780427
    Abstract: An optical scanner is configured such that an anamorphic condensing lens in an incident optical system has a diffractive lens structure at least in one lens surface thereof, and a length of an optical path increased by the diffractive lens structure ? [rad] is defined by an equation below by a function of height h from an optical axis: ?(h)=M(P2·h2+P4·h4+ . . . ), where Pn is a coefficient of an nth-order term of the height h (n is an even number), and M is a diffraction order, that the lens satisfies the following relations: ?216?P2??49, 1100?P4·(hm max)4/(fm·NAm4)?3800, and 10?fm?35, where hmmax [mm] is an effective diameter in the main scanning direction, fm [mm] is a focal length in the main scanning direction, and NAm is a numerical aperture in the main scanning direction, and that a wavefront aberration WFE1 [?rms] in a first wavelength ?1 [nm] satisfies the following relation: WFE1?0.01.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 15, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Hitoshi Fujino, Yoshifumi Nakamura
  • Publication number: 20140177022
    Abstract: An image display device includes a lens array, and a scanner to two-dimensionally scan the lens array with a light beam for image display, in which each of lenses of the lens array includes a convex surface with different curvatures in two directions orthogonal to the optical axis of the lens and to each other.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 26, 2014
    Inventors: Kenichiroh SAISHO, Makoto Inamoto, Yasuhiro Satoh, Jun Watanabe
  • Publication number: 20140160217
    Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 12, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
  • Patent number: 8749863
    Abstract: A plastic article is formable by using a metal die having a cavity to accommodate melted resin therein at a given pressure. The plastic article includes a transfer face to which is transferred a face shape of the metal die, a projection disposed at least one face other than the transfer face, an incomplete transfer face having a concave shape disposed at the same face on which the projection is disposed, formed by an incomplete transfer of a face shape of the cavity of the metal die, and an incomplete transfer face having a convex shape disposed at least one face other than the transfer face.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 10, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Takamichi Ohhashi, Yasuo Yamanaka, Eiichi Hayashi, Go Takahashi
  • Patent number: 8743444
    Abstract: An optical scanning device that scans a plurality of surfaces to be scanned in a main scanning direction by using a light beam includes: a plurality of light sources; a light deflector that deflects a plurality of light beams emitted from the light sources; and a scanning optical system that individually guides each one of the light beams deflected by the light deflector to a corresponding one of the surfaces to be scanned. The scanning optical system includes one scanning lens shared by the light beams, and at least one surface of the scanning lens has a plurality of optical surfaces corresponding to the plurality of light beams disposed in a sub-scanning direction with a flat surface provided between the optical surfaces.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Naoki Miyatake, Tadashi Nakamura, Eiichi Hayashi, Chieko Hatashita, Go Takahashi
  • Publication number: 20140132695
    Abstract: A light scanning unit and an electro-photographic image forming apparatus employing the same are provided.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 15, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Gi-sung PARK
  • Publication number: 20140126033
    Abstract: An image display device having a scanning characteristic excellent in the linearity without being upsized is provided. The image display device includes: an optical scanning unit that scans a light emitted from a light source in a first direction and a second direction of an image plane due to a rotational movement of reciprocation of a reflecting surface of the light; and an optical system enlarges a scanning angle of the scanned light, in which the optical system has a free curved surface lens on an optical scanning unit side, and has a free curved surface mirror on an image plane side. The free curved surface mirror may be arranged so that the first direction is substantially parallel to a first plane defined by an incident optical beam and a reflected light in the free curved surface mirror when the optical scanning unit remains static in the center of the scanning range.
    Type: Application
    Filed: June 22, 2011
    Publication date: May 8, 2014
    Inventors: Koji Hirata, Masahiko Yatsu
  • Publication number: 20140118455
    Abstract: An optical scanning apparatus scanning a light in a specific direction comprises a light source configured to irradiate a light; a diaphragm plate configured to comprise an opening section through which the light from the light source passes; and a holder configured to hold the diaphragm plate. The holder holds the diaphragm plate in a state of curving the diaphragm plate. The diaphragm plate in a curved state elastically deforms and comes into close contact with the holder through elastic deformation force.
    Type: Application
    Filed: October 16, 2013
    Publication date: May 1, 2014
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventor: Yasushi Kuribayashi
  • Publication number: 20140111591
    Abstract: A light scanning unit and an electrophotographic image forming apparatus are provided. The light scanning unit includes a light source emitting the light beams according to an image signal, an incident optical system including a flux-limiting element limiting the flux of light beams emitted by the light source, an optical deflector deflecting the light beams emitted by the light source in a main scanning direction, and an image forming optical system including a scanning optical element imaging the light beams deflected by the optical deflector on a scanning target surface, the light scanning unit forming an electrostatic latent image by scanning the light beams to the scanning target surface of the image bearing member. The scanning optical element of the scanning optical elements of the image forming optical system is eccentrically arranged from a central optical axis of the image forming optical system in a sub-scanning direction.
    Type: Application
    Filed: August 9, 2013
    Publication date: April 24, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Wan-chin KIM
  • Patent number: 8705157
    Abstract: An optical scanning device is provided, which includes a casing including a supporting wall supporting a deflector, a first reflecting mirror supporting portion and a second reflecting mirror supporting portion that are opposed to each other across the deflector and extend from the supporting wall and a reinforcing wall configured to extend from the supporting wall, between the deflector and first and second light source units, so as to connect the first reflecting mirror supporting portion with the second reflecting mirror supporting portion, the reinforcing wall including a first through-hole configured such that a first laser beam emitted by the first light source unit toward the deflector and the second laser beam emitted by the second light source unit toward the deflector pass therethrough.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: April 22, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yosuke Sugiyama