With Path Length Or Aberration Correcting Element Patents (Class 359/637)
  • Patent number: 10444481
    Abstract: A prism optical system has an optical element that includes, a first surface that defines a transmitting surface as an entrance surface and an internal reflecting surface as well, a second surface that defines an internal reflecting surface in opposition to the first surface, a third surface that defines an internal reflecting surface in opposition to the first surface and adjacent to the second surface, a fourth surface that defines an internal reflecting surface in opposition to the first surface and adjacent to the third surface and an internal reflecting surface closest to the image plane as well, and a fifth surface that defines a transmitting surface adjacent to the first surface and in opposition to the fourth surface; the fourth surface is defined by a rotationally asymmetric surface having a negative power in the Y-Z plane and a positive power in the X-direction perpendicular to the Y-Z plane.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: October 15, 2019
    Inventor: Koichi Takahashi
  • Patent number: 10162183
    Abstract: A head mounted display device includes a scanning section that forms a scan image by scanning a light beam emitted from a light source, a light guiding optical system that guides the light beam emitted from the scanning section, and a deflection member that deflects the light beam guided by the light guiding optical system toward the eye. The light guiding optical system includes an optical correction system in which a first light path length of a light beam from the scanning section to a first end portion on a nose side of the deflection member is longer than a second light path length of a light beam from the scanning section to a second end portion on an ear side of the deflection member, and that corrects scanning distortion in the scan image which cause a virtual image to have different magnifications in a horizontal direction.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: December 25, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Mitsutaka Ide
  • Patent number: 9746315
    Abstract: Side illumination is combined with scanning interferometry to provide a means for measuring with a single data-acquisition scan surfaces that contain sections suitable for interferometric processing as well as sections that are not suitable because of lack of fringes produced by the measurement. In the sections where no fringes are produced, the irradiance detected during the scan is processed using a depth-from-focus mapping method to yield a corresponding measurement. The result is a complete profilometric measurement of the sample surface with a single scan. In addition, by increasing sample irradiance through side illumination, the structural features of the sample become markedly more visible than when illuminated only by the object beam of the interferometer, which greatly facilitates finding focus and identifying regions of interest for the measurement.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: August 29, 2017
    Assignee: BRUKER NANO INC.
    Inventors: Joanna Schmit, Son Hoang Bui, Dong Chen, Matthew Jarrod Novak
  • Patent number: 9700199
    Abstract: To accurately position multiple tomographic image. An image processing apparatus includes a detecting unit configured to detect motion of an eye in a plurality of polarization-sensitive tomographic images, based on a predetermined region extracted from the plurality of polarization-sensitive tomographic images of the eye, and a positioning unit configured to position a plurality of tomographic luminance images corresponding to the plurality of polarization-sensitive tomographic images, based on the detected movement.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: July 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiro Tomatsu, Makoto Sato, Tomoyuki Makihira, Yoshihiko Iwase, Kazuhide Miyata, Hiroyuki Shinbata, Ritsuya Tomita, Daisuke Kibe
  • Patent number: 9300851
    Abstract: A method and a system are for compensating optical aberrations in a telescope. The method is applicable to a telescope wherein the element for receiving a primary beam is an image acquisition device (3), and involves using an algorithm without an image processing sensor for: a) detecting optical aberrations affecting the primary focus, by analyzing the images acquired by the image acquisition device (3), and b) calculating and generating first positional correction values, by processing the detected optical aberration values. The method also includes a step c) consisting in moving, in a controlled manner, the image acquisition device (3), applying suitable control signals generated from the first positional correction values. The system is suitable for implementing the proposed method.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: March 29, 2016
    Assignees: UNIVERSITA POLITECNICA DE CATALUNYA, PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE
    Inventors: Santiago Royo Royo, Vincent Suc
  • Patent number: 9244277
    Abstract: A tiled head-mounted display device comprises an optical component including a plurality of prisms with free-form surfaces, and a display component including a plurality of micro-displays (6), wherein the number of the micro-displays (6) and the number of the prisms with free-form surfaces is identical, and each prism with free-form surfaces and the corresponding micro-display (6) constitute a display channel. Each prism is a wedge prism including a first surface (2), a second surface (3) and a third surface (4). The exit pupil planes of each display channel are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as a single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion. The tiled head-mounted display device is compact and lightweight, and provides wide field of view and high resolution.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: January 26, 2016
    Assignees: The Arizona Board of Regents on behalf of the University of Arizona, Beijing Institute of Technology
    Inventors: Dewen Cheng, Yongtian Wang, Hong Hua
  • Patent number: 9140826
    Abstract: A plastic lens, comprising: a first edge section having a first outer circumferential edge surface formed substantially parallel to an optical axis of the plastic lens; and a second edge section having a second outer circumferential edge surface formed so as to have a step with respect to the first outer circumferential edge surface, wherein the first outer circumferential edge surface is not coated with a black coating material that suppresses internal reflection of light, and at least a portion of the second outer circumferential edge surface is coated with the black coating material that suppresses internal reflection of light.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: September 22, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kyoichi Miyazaki, Yukio Hibino
  • Patent number: 9085111
    Abstract: An optical element according to the present invention includes: an optical surface at a center portion thereof; a spacer section having a predetermined thickness on an outer circumference side of the optical surface; a support plate including one or a plurality of through holes penetrating the optical surface, inside a transparent resin material; and a penetrating portion and/or a concave portion for releasing the resin material when forming resin, in a further outer peripheral portion of the support plate.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: July 21, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuji Yano, Takahiro Nakahashi, Tetsuya Tamiya
  • Publication number: 20150029593
    Abstract: A spherical aberration corrector is offered which permits a correction of deviation of the circularity of at least one of an image and a diffraction pattern and a correction of on-axis aberrations to be carried out independently. The spherical aberration corrector (100) is for use with a charged particle beam instrument (1) for obtaining the image and the diffraction pattern and has a hexapole field generating portion (110) for producing plural stages of hexapole fields, an octopole field superimposing portion (120) for superimposing an octopole on at least one of the plural stages of hexapole fields to correct deviation of the circularity of at least one of the image and diffraction pattern, and a deflection portion (130) for deflecting a charged particle beam.
    Type: Application
    Filed: July 23, 2014
    Publication date: January 29, 2015
    Inventors: Hidetaka Sawada, Yu Jimbo
  • Patent number: 8928985
    Abstract: An image blur correction device includes a lens unit having at least one lens and rotationally moving in a first direction which is a rotation direction of a first fulcrum axis and in a second direction which is a rotation direction of a second fulcrum axis relative to an outer casing, a first driving motor which causes the lens unit to pivot in the first direction, and a second driving motor which causes the lens unit to pivot in the second direction. An auxiliary axis is disposed opposite to the first driving motor with interposing of the lens unit, the lens unit pivots in the first direction and in the second direction by the rotation of output axes of the first and second driving motors, and each output axis is rotatably supported by a pair of first bearings and each auxiliary axis is rotatably supported by a second bearing.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: January 6, 2015
    Assignee: Sony Corporation
    Inventors: Tatsuyuki Nakayama, Takumi Fukuda, Keishi Kobayashi, Kazuhiro Hattori, Atsushi Horidan
  • Patent number: 8903207
    Abstract: A Head Up Display can be utilized to find light from an energy source. The Head Up Display includes a first waveguide having a first input coupler and a first output coupler. The Head Up Display can also include a second waveguide having a second input coupler and a second output coupler. The first waveguide has a first major surface and the second waveguide has a second major surface, which are disposed approximately parallel to each other. The first waveguide and the second waveguide are positioned as a combiner and allowing viewing an outside feed and information from an image source. The first input coupler diffracts light in the first field of view into the first waveguide and light in a second field of view reaches the second input coupler and is diffracted into the second waveguide.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: December 2, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Robert D. Brown, Kurt A. Stahl, Robert B. Wood
  • Patent number: 8848289
    Abstract: An eyepiece for a HMD includes a waveguide, an ambient light polarizer, and a wire grid polarizer with a diffraction lens having a lens function patterned into the wire grid polarizer. Polarized image light is guided between eye-ward and ambient sides of the waveguide from a display source to a viewing region of the waveguide where the polarized image light is directed out of the waveguide through the eye-ward side. The viewing region passes ambient light incident on the ambient side through to the eye-ward side. The ambient light polarizer is disposed adjacent to the ambient side to polarize the ambient light into polarized ambient light having a second polarization orthogonal to the first polarization. The wire grid polarizer is disposed adjacent to the eye-ward side along the viewing region. The wire grid polarizer is oriented to applying the lens function to the polarized image light via diffraction.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: September 30, 2014
    Assignee: Google Inc.
    Inventors: Babak Amirparviz, Chia-Jean Wang
  • Patent number: 8836720
    Abstract: Units which respectively acquire information on an aberration generated by a display optical system and information on an aberration generated by a vision correction optical system used by an observer are arranged. Aberration correction is executed based on the two aberrations. An aberration generated by a combination of the display optical system and the vision correction optical system used by the observer can be appropriately corrected for each observer.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Oyama, Takuya Tsujimoto
  • Patent number: 8786945
    Abstract: Fluorescence is generated from an irradiated point on an inspection surface of a sample and the fluorescence is collected by an objective lens. Here, because of the magnification chromatic aberration of the objective lens, the fluorescence going out from the objective lens travels along a path shifted from the irradiation light and changed substantially into a non-scan light by a galvano-scanner. The fluorescence passes through a dichroic mirror into a plane-parallel plate after light of unnecessary wavelength is removed by a filter. The plane-parallel plate is driven in synchronization with the galvano-scanner by a computer and corrects the shift and inclination of the optical axis generated by the magnification chromatic aberration of the objective lens. Then, the fluorescence forms an image of the irradiation point of the inspection surface of the sample on a pin hole of a pin hole plate by using a collective lens.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: July 22, 2014
    Assignee: Nikon Corporation
    Inventors: Yuki Yoshida, Naoshi Aikawa
  • Patent number: 8687278
    Abstract: An opto-mechanical switch produces different optical paths from two optical path sections out of a plurality of optical path sections that are oriented in different spatial directions. The switch has an optical component on which one end of each optical path section impinges, and which is adapted to be moved linearly in a direction of movement at right angles to the optical path sections between different switching positions, in which it selectively couples different optical path sections optically with each other. Further provided is a measuring system for the analysis of fluids, having such an opto-mechanical switch.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: April 1, 2014
    Assignees: Buerkert Werke GmbH, Karlsruher Institut fuer Technologie
    Inventors: Marko Brammer, Timo Mappes
  • Patent number: 8662675
    Abstract: A projection lens for projecting images with high degrees of image offset while limiting the physical offset of the projection lens elements. The projection lens arrangement limits the displacement of the optical elements relative to the optical axis of the display panel and enables a very thin, efficient projector.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: March 4, 2014
    Assignee: Texas Instruments Incorporated
    Inventor: Patrick Rene Destain
  • Patent number: 8498055
    Abstract: A space telescope system includes, but is not limited to, a support platform configured to orbit astronomical object, a plurality of mirrors mounted to the support platform and spaced apart from one another, the plurality of mirrors being configured to reflect a plurality of focused beams, and a focal plane image combiner positioned to intersect the plurality of focused beams and configured to combine the plurality of focused beams to form a composite image.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: July 30, 2013
    Assignee: Honeywell International Inc.
    Inventors: David J. Dopilka, William Airo, Mitch Fletcher
  • Publication number: 20130176559
    Abstract: A luminous flux branching element includes a transparent base member arranged diagonally to an optical axis and having an incidence plane and an emission plane parallel to each other. Incident light from the incidence plane is split into a main luminous flux emitted from an emission position on the emission plane and a branched luminous flux emitted from a branch position apart from the emission position and having a smaller light quantity than of the main luminous flux. A reflecting member is arranged on the incidence plane to cause the incidence plane to reflect reflected light from the emission plane. A non-coat region in which antireflection-treatment is not performed is formed in a region of the emission plane where the incident light from the incidence plane is reached, and antireflection-treatment is performed in the emission plane excluding the non-coat region and the incidence plane.
    Type: Application
    Filed: January 9, 2013
    Publication date: July 11, 2013
    Applicant: NuFlare Technology, Inc.
    Inventor: NuFlare Technology, Inc.
  • Patent number: 8416414
    Abstract: A system (10) for multispectral imaging includes a first optical filter (24, 20) having at least two passbands disposed in different spatial positions on the first optical filter, a second optical filter (20, 24) having another at least two passbands, and processor (32) adapted to identify an intensity of light in the at least two passband of the second optical filter.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: April 9, 2013
    Inventor: George Themelis
  • Patent number: 8395843
    Abstract: An array of light valves switch light by enabling and disabling total internal reflection (TIR) on a surface of the light valve. The disabling of the TIR is accomplished by putting another optical element in contact with the surface and then diffusing or changing the direction of the light. The mechanical mechanism to move the optical element is a simple one in that it only moves the optical element a small distance to change the valve from a first position to a second position.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Rambus International Ltd.
    Inventor: Brian Edward Richardson
  • Patent number: 8310753
    Abstract: A confocal scanning microscope including: an objective system (second objective lens 23 and objective lens 24) illuminating a sample SA with illumination light; a scanning mechanism 31 scanning the sample SA to obtain an intensity signal; and a scanning optical system 32 provided between the scanning mechanism and the objective system. The scanning optical system composed of, in order from the scanning mechanism side, a first positive lens group G1, a second negative lens group G2, and a third positive lens group G3. The third lens group has two chromatic aberration correction portions each formed by a positive lens and a negative lens or negative lens and positive lens. Glass materials are selected such that one performs chromatization and the other performs achromatization, thereby providing a confocal scanning microscope capable of correcting lateral chromatic aberration generated in the objective system in the specific wavelength region by the scanning optical system.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: November 13, 2012
    Assignee: Nikon Corporation
    Inventors: Fumio Suzuki, Naoshi Aikawa, Kotaro Yamaguchi
  • Patent number: 8270088
    Abstract: A laser scanning microscope is disclosed that combines light from first and second scanning optical systems onto a common optical path using a beam combiner. A first plane-parallel transparent plate and a beam combiner are positioned on a support that may be moved relative to the common optical path. The first plane-parallel transparent plate has an optical thickness equal to the optical thickness of the beam combiner and is oriented with its surface normal lying substantially parallel with the surface normal of the beam combiner. An astigmatism-correcting optical element is provided on the common optical path, with the astigmatism-correcting optical element generating astigmatism that is equal in magnitude, but different in direction by 90 degrees, to the astigmatism generated by non-collimated light that is transmitted through the beam combiner. When the support is repositioned, spherical aberration in various light paths is maintained constant so that it may be easily corrected.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: September 18, 2012
    Assignee: Olympus Corporation
    Inventor: Eiji Yokoi
  • Patent number: 8237626
    Abstract: A head-mounted device mounted on a wearer's head has a first pressing unit to press against the wearer's head from a position of his/her medulla, a second pressing unit to press against the wearer's head in an opposite direction to a pressing direction of the first pressing unit, and a mounting unit to mount the head-mounted device on the wearer's head by adjusting at least one of the first pressing unit and the second pressing unit.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: August 7, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiki Ishino, Takaaki Nakabayashi, Yoshihiro Saito, Toshiyuki Okuma
  • Patent number: 8174769
    Abstract: Embodiments of the present invention are directed to beamsplitters that include optical elements to correct for beam offset. In one embodiment, a beamsplitter includes a first plate having two approximately parallel and opposing planar surfaces and a partially reflective layer coating one of the planar surfaces, and a compensator plate having two approximately parallel and opposing planar surfaces. The compensator plate is positioned so that an incident beam of light passing through the compensator plate acquires a first beam offset. Subsequently, the incident beam of light with the first beam offset passing through the first plate is split into a reflected beam and a transmitted beam by the partially reflective layer where the transmitted beam has a second beam offset that substantially cancels the first beam offset such that the transmitted beam is approximately parallel to and aligned with the incident beam.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: May 8, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Huei Pei Kuo, Shih-Yuan Wang, Michael Renne Ty Tan, Sagi Mathai
  • Patent number: 8125716
    Abstract: An optical assembly uses a plastic prism with one flat surface and a collimating lens optic to provide the capability of imaging a color micro-display to the eye. The collimating optic and flat prism surface can allow for aberration-free diopter adjustment and an image with very low-magnitude, nearly-symmetric distortion. The collimating optic can also provide environmental protection of the prism involving an optical plastic device. The input illumination from the micro-display enters the prism, is reflected two times within the prism, exits the prism, and passes through the collimating optic before being viewed by the eye. Such an optical assembly can provide a field of view with eye-relief and exit pupil when viewing a full-color micro-display.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: February 28, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kyle R. Bryant, Colin E. Reese, Richard J. Heimer
  • Patent number: 8116008
    Abstract: A method for optimizing cost and performance in a lens assembly is disclosed. The method relaxes the constraints of optically correcting lateral chromatic aberration and distortion on the lens assembly and instead electronically corrects for lateral chromatic aberration and distortion. As a result the lens assembly transmissivity and MTF improve dramatically and other aberrations are reduced as a result of re-optimizing the lens assembly merit function. The cost and volume of the lens assembly are reduced as well. The optimized lens assembly could be used in rear or front projection display devices as a well as image acquisition devices.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: February 14, 2012
    Assignee: Geo Semiconductor Inc.
    Inventors: Gregory A. Prior, Gopal Ramachandran, Zorawar S. Bassi
  • Patent number: 8094377
    Abstract: A see-through head-mounted optical apparatus for a viewer has at least one display module, each display module having a display energizable to form an image and a positive field lens optically coupled to the surface of the display and disposed to direct imaged light from the display toward a first surface of a prism. A curved reflector element is in the path of the imaged light through the prism and disposed at a second surface of the prism, opposite the first surface. The curved reflector element has a refractive surface and a curved reflective surface disposed to collimate imaged light received from the display and direct this light toward a beam splitter that is disposed within the prism and that is at an oblique angle to the collimated reflected light. The beam splitter redirects the incident collimated reflected light through the prism to form an entrance pupil for the viewer.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: January 10, 2012
    Assignee: NVIS, Inc.
    Inventors: David Kessler, Minoo Bablani
  • Patent number: 8081311
    Abstract: A system (10) for multispectral imaging includes a first optical filter (24) having at least two passbands disposed in different spatial positions on the first optical filter, a second optical filter (20) having another at least two passbands, and processor (32) adapted to identify an intensity of light in the at least two passband of the second optical filter (20).
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 20, 2011
    Assignee: General Hospital Corporation
    Inventor: George Themelis
  • Patent number: 8054555
    Abstract: Providing a sighting device having a simple structure, being easy to manufacture and free from parallax. A sighting device comprises, in order from a target object side, a positive meniscus lens having a convex surface facing the target object and a negative meniscus lens having a convex surface facing the target object, wherein the surface of said positive meniscus lens that faces away from said target object or the surface of said negative meniscus lens that faces toward said target object is adapted to constitute a semi-transparent reflection surface or a wavelength selective reflection surface, and a point source is provided at a focal point of a catadioptric optical system constituted by said semi-transparent reflection surface or said wavelength selective reflection surface and a refracting surface of the negative meniscus lens having with the convex surface facing said target object, the refracting surface facing away from said target object side.
    Type: Grant
    Filed: February 9, 2008
    Date of Patent: November 8, 2011
    Assignees: Nikon Vision Co., Ltd., Nikon Corporation
    Inventor: Kenji Yamada
  • Publication number: 20110260037
    Abstract: An optical concentrator is disclosed which includes an imaging, aplanatic optical element having a front surface with a one-way light admitting portion, a back surface with a reflective portion, and an interior region of refractive material disposed between the front and backs surfaces.
    Type: Application
    Filed: October 23, 2009
    Publication date: October 27, 2011
    Inventors: Roland Winston, Weiya Zhang
  • Patent number: 8031407
    Abstract: An imaging assembly for an image sensor may include a lens, a transparent substrate and two aspherical optical coatings on each side of the substrate. The imaging assembly can also incorporate an opaque coating with an opening in-line with the lens to form an aperture, an anti-reflection coating, and an infrared filter coating.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: October 4, 2011
    Assignee: STMicroelectronics Ltd.
    Inventors: Jonathan Ephriam David Hurwitz, Ewan Findlay
  • Patent number: 8014073
    Abstract: An absorptive coating is in contact with an optical beam splitter such that a signal beam and a reference beam incident on the beam splitter from opposite sides are can be combined to produce two interference beams having a phase difference of about ? 2 .
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: September 6, 2011
    Assignee: Optoplex Corporation
    Inventor: Yung-Chieh Hsieh
  • Patent number: 7995280
    Abstract: A beam delivery system of a projection exposure system comprises a laser generating a beam of laser light from a plurality of longitudinal laser modes in a cavity, wherein light generated by a single longitudinal laser mode has an average line width ?lat, wherein the laser light of the beam has, at each of respective lateral positions of the beam, a second line width ?lat corresponding to lateral laser modes, and wherein the laser light of the beam has, when averaged over a whole cross section thereof, a line width ?b corresponding to plural lateral laser modes, and wherein ?m<?lat<?b, and wherein an optical delay apparatus disposed in the beam provides an optical path difference ?l, wherein 0.8 · ? 0 2 ( 2 · ? ? ? ? l ) < ? ? ? l < 1.8 · ? 0 2 ( 2 · ? ? ? ? l ) , wherein ?0 is an average wavelength of the light of the first beam of laser light, and ??lat represents the second line width.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: August 9, 2011
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Matthias Kuss, Damian Fiolka, Gerd Reisinger, Manfred Maul, Vladimir Davydenko
  • Patent number: 7986463
    Abstract: A beam blocking and combining optic comprising a wedged optically transparent substrate with a hard dielectric coating applied to a beam combining side of the substrate. The coating has a high reflectance at a laser wavelength and high transmittance at visible wavelengths. The single optical component can combine laser beams into a viewing path and act as a laser safety filter to protect the viewer from reflected laser radiation while providing good color balance and very low astigmatism in the viewing path and very low astigmatism in the reflected laser beam.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: July 26, 2011
    Assignee: Ellex Medical Pty Ltd
    Inventors: Dmitri Feklistov, Oksana Feklistova, legal representative
  • Patent number: 7984994
    Abstract: A projection optical system including a projection lens, a first mirror that reflects a light from the projection lens, and a second mirror that widens an angle of a light from the first mirror by reflecting the light projects a light modulated according to an image signal from an optical engine unit. A third mirror reflects a light from the projection optical system. A screen transmits a light from the third mirror. An optical axis of the projection lens substantially matches an optical axis of the second mirror, and the light from the optical engine unit is shifted to a specific side from the optical axis of the projection lens.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: July 26, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Morikuni, Masatoshi Yonekubo, Toshihiko Sakai, Shunji Kamijima
  • Patent number: 7959297
    Abstract: A digital image projector includes a light assembly configured to project light along a light path from at least one laser array light source, the projected light having an overlapping far field illumination in a far field illumination portion of the light path; a temporally varying optical phase shifting device configured to be in the light path; an optical integrator configured to be in the light path; a spatial light modulator located downstream of the temporally varying optical phase shifting device and the optical integrator in the light path, the spatial light modulator configured to be located in the far field illumination portion of the light path; and projection optics located downstream of the spatial light modulator in the light path, the projection optics configured to direct substantially speckle free light from the spatial light modulator toward a display surface.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: June 14, 2011
    Assignee: Eastman Kodak Company
    Inventors: Barry D. Silverstein, Gary E. Nothhard
  • Publication number: 20110019285
    Abstract: Embodiments of the present invention are directed to beamsplitters that include optical elements to correct for beam offset. In one embodiment, a beamsplitter includes a first plate having two approximately parallel and opposing planar surfaces and a partially reflective layer coating one of the planar surfaces, and a compensator plate having two approximately parallel and opposing planar surfaces. The compensator plate is positioned so that an incident beam of light passing through the compensator plate acquires a first beam offset. Subsequently, the incident beam of light with the first beam offset passing through the first plate is split into a reflected beam and a transmitted beam by the partially reflective layer where the transmitted beam has a second beam offset that substantially cancels the first beam offset such that the transmitted beam is approximately parallel to and aligned with the incident beam.
    Type: Application
    Filed: April 4, 2008
    Publication date: January 27, 2011
    Inventors: Huei Pei Kuo, Shih-Yuan Wang, Michael Renne Ty Tan, Sagi Mathai
  • Patent number: 7864433
    Abstract: An exemplary optical hybrid includes a 50/50 un-polarized beam splitter, a folding prism, a beam shifter, a spacer and a phase shifter such that from an input S-beam (signal) and an L-beam (reference), four outputs, S+L, S?L, S+jL and S?jL, are produced. The phase difference between the two components of each output beam produced by the S and L beams in the optical hybrid is ?+0, ?+90, ?+180, or ?+270 degrees, where ? is the phase difference of the signal beam with respect to the reference beam. In an alternative embodiment, the phase difference between the two components of each output beam produced by the S and L beams in the optical hybrid is ?+0, ?+X, ?+180, or ?+180+X degrees, where X is an arbitrary number of degrees greater than 0 and smaller than 180.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: January 4, 2011
    Assignee: Optoplex Corporation
    Inventor: Yung-Chieh Hsieh
  • Patent number: 7860699
    Abstract: A software product includes instructions stored on computer-readable media, that when executed by a computer, perform steps for optimizing an optical system design and a digital system design. The instructions are for simulating an optical model of the optical system design, simulating a digital model of the digital system design, analyzing simulated output of the optical model and simulated output of the digital model, to produce a score, modifying the optical model and the digital model, based upon the score, controlling re-execution of the instructions for simulating the optical model, the instructions for simulating the digital model, the instructions for analyzing and the instructions for modifying to produce an optimized optical model and an optimized digital model, and outputting predicted performance of the optimized optical and digital models.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: December 28, 2010
    Assignee: OmniVision Technologies, Inc.
    Inventors: Edward R. Dowski, Jr., Gregory E. Johnson, Kenneth S. Kubala, Kenneth Ashley Macon, Goran M. Rauker
  • Patent number: 7859762
    Abstract: An aberration correction apparatus comprising a liquid crystal device which includes a first electrode layer that is formed with regions divided concentrically, a second electrode layer that is formed with regions divided concentrically, and a liquid crystal that is sandwiched in between the first electrode layer and the second electrode layer, and which transmits an incident light beam therethrough, an objective lens which condenses the light beam transmitted through the liquid crystal device, and a liquid-crystal-device drive circuit which drives the liquid crystal device, wherein the liquid-crystal-device drive circuit impresses a potential which belongs to a predetermined region included in a liquid crystal characteristic that is a relationship between potentials impressed on the respective electrode layers sandwiching in the liquid crystal therebetween and a phase change magnitude of the light beam transmitted through the liquid crystal, on the concentric regions formed in the first electrode layer, and
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: December 28, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventors: Tsuyoshi Eiza, Shinya Shimizu
  • Patent number: 7859761
    Abstract: An illumination system including a coherent light source and a speckle-reducing module is provided. The coherent light source is adopted for providing a light beam. The speckle-reducing module is disposed at an optical path of the light beam. The speckle-reducing module includes a rotator, a carrier and an optical path adjusting member. The rotator is adopted for rotating on a reference plane about a spindle axis passing through the rotator. The spindle axis is substantially perpendicular to the reference plane. The carrier is disposed at the rotator. The optical path adjusting member is disposed at the carrier and at the optical path of the light beam. The optical path adjusting member has an incident surface inclined at an angle with respect to the reference plane.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: December 28, 2010
    Assignee: Young Optics Inc.
    Inventors: Yi-Hsueh Chen, Sung-Nan Chen, Keng-Han Chuang
  • Patent number: 7764433
    Abstract: A system and method for correcting optical aberrations in optical devices, such as wide-field microscopes, optical tweezers and optical media devices, such as DVD drives. The system uses adaptive optics to correct optical aberrations, such as spherical and space-variant aberrations. Spherical aberrations can be corrected using one adaptive optical elements and space-variant aberrations can be corrected using numerous adaptive optical elements in tandem. The adaptive optical elements may be of several types, such as a liquid lenses, deformable membrane mirrors or various liquid crystal phase and amplitude modulators. Adaptive optics can also be used to simultaneously shift the focus of the optical device and correct optical aberrations.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: July 27, 2010
    Assignees: The Regents of the University of California, Yeda Research and Development Co., Ltd.
    Inventors: Zvi Kam, David A. Agard, Peter Kner, John W. Sedat
  • Patent number: 7751298
    Abstract: A liquid crystal element for correcting wave aberration included in an optical disc apparatus, is controlled by a liquid crystal element control unit which has a memory portion that stores information about a variation with time of orientation direction of liquid crystal in the case where a voltage is applied to the liquid crystal, with respect to at least one type of voltage value. The liquid crystal element control unit has a drive voltage deciding portion that obtains time period after a predetermined drive voltage is applied to the liquid crystal element until a reproduced signal obtained by processing an electric signal converted by the light detecting unit becomes optimal, and decides a drive voltage to be applied to the liquid crystal element based on the obtained time period, the information stored in the memory portion, and the predetermined drive voltage.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: July 6, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventors: Tsuyoshi Eiza, Shinya Shimizu
  • Patent number: 7733584
    Abstract: An optical device includes an elongated tube configured for insertion into a body and optical members located in the tube. The optical members are configured to have an optical invariant-to-clear aperture semidiameter ratio greater than about 0.05 and an optical path difference less than about a value of the optical invariant divided by at least 250 times a midrange wavelength in a spectral range from about 435.8 nm to about 656.3 nm, and are preferably formed of an extraordinary dispersion optical material. A method includes conducting polychromatic light through at least one optical member located in an elongated tube configured for insertion into a body, where the optical members have an optical invariant-to-clear aperture semidiameter ratio greater than about 0.05 and an optical path difference less than about a value of an optical invariant divided by at least 250 times the midrange wavelength from about 435.8 to about 656.3 nm.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: June 8, 2010
    Assignee: Smith & Nephew, Inc.
    Inventor: Yuri Kazakevich
  • Publication number: 20100128356
    Abstract: A beam blocking and combining optic comprising a wedged optically transparent substrate with a hard dielectric coating applied to a beam combining side of the substrate. The coating has a high reflectance at a laser wavelength and high transmittance at visible wavelengths. The single optical component can combine laser beams into a viewing path and act as a laser safety filter to protect the viewer from reflected laser radiation while providing good colour balance and very low astigmatism in the viewing path and very low astigmatism in the reflected laser beam.
    Type: Application
    Filed: December 12, 2007
    Publication date: May 27, 2010
    Inventors: Dmitri Feklistov, Oksana Feklistova
  • Patent number: 7679830
    Abstract: An optical imaging system includes optics for imaging a wavefront of electromagnetic radiation to form an image at a detector. The system also includes a plurality of optical phase filters. Each of the phase filters alters phase of the wavefront. The phase filters cooperate to make the system less sensitive to misfocus, as compared to the optical imaging system without the phase filters. Another optical imaging system includes a detector and optics having two or more optical elements for imaging a wavefront onto the detector. The optical elements include aspherical surfaces that cooperate to alter phase of the wavefront such that the optics are less sensitive to defocus as compared to the optics without the aspherical surfaces. The system also includes a post processor for reversing phase alteration induced by the aspherical surfaces to produce an in-focus electronic image.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: March 16, 2010
    Assignee: The Regents of the University of Colorado
    Inventor: Edward Raymond Dowski, Jr.
  • Patent number: 7672056
    Abstract: A wavefront correction system using a dual frequency liquid crystal spatial light modulator to vary phase relationships of a wavefront is disclosed. A light beam from the dual frequency liquid crystal spatial light modulator can be split into a reference beam and a plurality of measurement beams to enhance a speed and/or accuracy of phase measurement. A temperature of the dual frequency liquid crystal spatial light modulator can be sensed to facilitate temperature control and/or temperature compensation, so as to enhance the accuracy associated with use of the crossover frequency used to control the dual frequency liquid crystal spatial light modulator.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: March 2, 2010
    Assignee: The Boeing Company
    Inventors: Jonathan Maram, Jeffrey H. Hunt
  • Patent number: 7656564
    Abstract: An apparatus for compensating for pixel distortion while reproducing hologram data includes an extraction unit, a determination and calculation unit, a table, and a compensation unit. The extraction unit extracts a reproduced data image from a reproduced image frame including the reproduced data image and borders. The determination and calculation unit determines position values of edges of the extracted reproduced data image, and calculates average magnification error values of pixels within line data from position values of start and end point pixels thereof, which are based on the determined position values of the edges. The table stores misalignment compensation values for the pixels within the line data, wherein the misalignment compensation values correspond to predetermined references for average magnification error values.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: February 2, 2010
    Assignee: Daewoo Electronics Corporation
    Inventor: Pil Sang Yoon
  • Publication number: 20100008196
    Abstract: In optical disc systems, read-out is hampered because of spherical aberrations resulting from cover layer thickness variations or because discs consists of multiple layers. The aberration correcting apparatus (1) of the present invention is arranged to correct such an optical aberration. Therefore, the aberration correcting apparatus (1) comprises a fluid chamber containing a first fluid and a second fluid having different indices of refraction. The first (5) and second fluid (6) are in contact over a meniscus (7) acting as a refractive surface, wherein the shape of the meniscus (7) can be influenced by a magnetic field generated by a magnetizing coil (20).
    Type: Application
    Filed: December 19, 2005
    Publication date: January 14, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Helmar Van Santen, Michael Adrianus Henricus Van Der AA
  • Patent number: RE43089
    Abstract: In one form, an imaging system comprises an imager that forms an image of an object in a field of view, a rotationally symmetric lens assembly disposed between the imager and the object, and an equalizer. The rotationally symmetric lens assembly provides increased collection efficiency for a given depth of field, whereby the rotationally symmetric lens assembly causes aberration, compared to a well-focused lens. The rotationally symmetric lens assembly comprises a front negative lens, a rear positive lens, and an aperture positioned between the front and rear lenses. The equalizer, which is connected to the imager, receives image data and at least partially compensates for the aberration caused by the rotationally symmetric lens assembly.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: January 10, 2012
    Assignee: Datalogic Scanning, Inc.
    Inventors: Bryan L. Olmstead, Alan Shearin