Projection Type Patents (Class 359/649)
  • Patent number: 10401720
    Abstract: A projection lens unit (15) of a projector (10) is disposed in a state in which an optical axis (CL) of the projection lens unit deviates from a center of an image forming panel (14); a first lens holder (43) of a lens barrel (40) includes holding pieces (55a, 55b) that are provided at intervals in a circumferential direction of a first lens group (L1) and are engaged with a first portion (A1) of the first lens group positioned on a side to which the image forming panel is shifted, and a holding piece (55c) that is engaged with a second portion (A2) of the first lens group positioned on a side opposite to the side to which the image forming panel is shifted; and the linear expansion coefficient of each of the holding pieces is lower than the linear expansion coefficient of the holding piece.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: September 3, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Hiroshi Kuboya
  • Patent number: 10386618
    Abstract: A projection optical system is constituted by, in order from the reduction side, a first optical system constituted by a plurality of lenses for forming an image displayed by image display elements as an intermediate image, and a second optical system constituted by a plurality of lenses for forming the intermediate image on a magnification side conjugate plane. Conditional Formula (1) below is satisfied. 1.50<f2/|f|<2.80??(1).
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: August 20, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Masaru Amano
  • Patent number: 10375363
    Abstract: A projection optical system (10) projects from a first image plane (5) on a reducing side to a second image plane (6) on an enlargement side. The projection optical system (10) includes a first optical system (11) that includes a plurality of lenses and forms a first intermediate image (51) formed inside the first optical system (11) by light incident from the reducing side into a second intermediate image (52) on the enlargement side of the first optical system (11); a second optical system (12) that includes a first reflective surface (M1) with positive refractive power which is positioned further to the enlargement side than the second intermediate image (52); and a glass block (30) that is disposed between the first optical system (11) and the first reflective surface (M1), the glass block (30) passing light rays from the first optical system (11) to the second intermediate image (52).
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: August 6, 2019
    Assignee: NITTOH INC.
    Inventor: Takahiko Matsuo
  • Patent number: 10371924
    Abstract: Provided is a photographing apparatus having both a phase difference auto-focusing function and a contrast auto-focusing function. Provided is an auxiliary light projector capable of projecting auxiliary light of a pattern suitable for the photographing apparatus. An auxiliary light projector and a photographing apparatus including the auxiliary light projector according to an embodiment of the present disclosure may reduce an auto-focusing time with respect to an object and improve reliability of an auto-focusing function.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: August 6, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Takayuki Sasaoka
  • Patent number: 10330276
    Abstract: Provided is a vehicular headlamp including an excitation light source, a phosphor excited by the excitation light source, a projection lens, and a scanning mechanism configured to receive light generated by an excitation light source array on a reflective surface of a reflector and scan the light toward the phosphor. The excitation light source is formed as the excitation light source array having a plurality of light emitting portions. Between the excitation light source array and the scanning mechanism, a lens array having a plurality of light condensing portions is provided. The plurality of light condensing portions are arranged to respectively face the plurality of light emitting portions, and configured to condense lights emitted from respective light emitting portions on the reflective surface, respectively, and arrange respective optical images of reflected lights on the phosphor.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 25, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Naoki Uchida, Noriko Sato
  • Patent number: 10318825
    Abstract: In a vehicle-mounted image recognition apparatus, a resolution of an image projected on an imaging plane of an image sensor is different at a position away from a center between a circumferential direction and a radial direction. To make a circumferential resolution higher than a radial resolution, at least a lower half of the imaging plane is located closer to a circumferential focus than a middle of a radial focus and the circumferential focus at a position off the optical axis center of the image projected on the image sensor through the image-forming optical system. This is achieved by adjusting the position of the imaging plane when manufacturing or by selecting a lens with high circumferential resolution. This apparatus improves recognition accuracy in recognizing traffic lanes without using an expensive lens exhibiting high resolution both in the circumferential direction and in the radial direction.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: June 11, 2019
    Assignees: NIDEC COPAL CORPORATION, NIDEC ELESYS CORPORATION
    Inventors: Yuta Nakamura, Yohei Nagai, Yushi Takehara, Naoya Takeda
  • Patent number: 10107483
    Abstract: A headlight of the type worn by medical and dental professionals includes a housing having an opening therein. A light source is positioned in the housing to output light through the opening. A singlet lens is mounted in the housing proximate the opening, and a doublet lens is disposed between the light source and the singlet lens.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: October 23, 2018
    Assignee: Kerr Corporation
    Inventor: Matthew Christopher Oren
  • Patent number: 10042138
    Abstract: A projection lens has lens holding frames that hold lenses. In a case where an image forming panel is disposed to be shifted with respect to an optical axis of the projection lens, an increase in temperature of a first part on a side to which the image forming panel is shifted with respect to the optical axis L, is greater than that of a second part on the opposite side. A hollow structure, which makes the first part 36f and the second part 36g communicate with each other, has a porous layer and is filled with a heat storage medium. By circulating the heat storage medium through the inside of the hollow structure, the first part is cooled, and the second part is heated. Therefore, temperature distribution in the circumferential direction of the lens barrel becomes uniform, and deterioration in performance of the projected image is suppressed.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: August 7, 2018
    Assignee: FUJIFILM Corporation
    Inventor: Hitoshi Shimizu
  • Patent number: 10044995
    Abstract: The present disclosure provides a projection image correcting method and a projection apparatus. The method includes: receiving real-time brightness values of M sub-images in a current to-be-displayed image, the real-time brightness values being acquired by a plurality of sensors arranged on a reflector which is located opposite to a projection lens, and obtaining a brightness adjusting value of a j-th sub-image in the current to-be-displayed image according to the real-time brightness values of the M sub-images. Adjustment is made, in combination with brightness adjusting values obtained from the current image to be displayed, to brightness values of each sub-image in an image to be displayed after the current to-be-displayed image, thereby making brightness of displayed images uniform, and improving the projection image quality.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: August 7, 2018
    Assignees: HISENSE CO., LTD., HISENSE USA CORPORATION, HISENSE INTERNATIONAL CO., LTD.
    Inventors: Dabo Guo, Zhen Wang
  • Patent number: 10012815
    Abstract: A projection optical system includes a first lens unit that moves in a direction of an optical axis in adjusting an amount of field curvature and a second lens unit located closer to a reduction side than the first lens unit. The first lens unit includes an aspherical lens satisfying predetermined conditional equations.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: July 3, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Junya Ichimura
  • Patent number: 10007188
    Abstract: An exposure apparatus exposes a substrate with illumination light via a liquid. A liquid immersion member of the exposure apparatus has a lower surface, a plurality of collection ports, and a plurality of supply ports. The lower surface has an opening through which illumination light passes. The collection ports are arranged at the lower surface to surround the opening, and the supply ports are arranged at the lower surface and between the opening and the collection ports to surround the opening, such that the liquid is supplied via the supply ports onto the substrate while the substrate is arranged opposite to a plane-convex lens of a projection optical system and such that the liquid is collected via the collection ports from the substrate.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: June 26, 2018
    Assignee: NIKON CORPORATION
    Inventor: Akimitsu Ebihara
  • Patent number: 9964859
    Abstract: A lithography projection objective for imaging a pattern in an object plane onto a substrate in an image plane. The projection objective comprises a multiplicity of optical elements along an optical axis. The optical elements comprise a first group of optical elements following the object plane, and a last optical element, following the first group and next to the image plane. The projection objective is tunable or tuned with respect to aberrations for the case that the volume between the last optical element and the image plane is filled by an immersion medium with a refractive index substantially greater than 1. The position of the last optical element is adjustable in the direction of the optical axis. A positioning device is provided that positions at least the last optical element during immersion operation such that aberrations induced by disturbance are at least partially compensated.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 8, 2018
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Ulrich Loering, Vladan Blahnik, Wilhelm Ulrich, Daniel Kraehmer, Norbert Wabra
  • Patent number: 9857557
    Abstract: An optical lens assembly includes a first lens element, a second lens element, a third lens element, and a fourth lens element from an object side to an image side in order along an optical axis. The first lens element to the fourth lens element each include an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. The object-side surface of the first lens element has a convex portion in a vicinity of the optical axis. The second lens element has positive refracting power, and the object-side surface of the second lens element has a concave portion in a vicinity of a periphery of the second lens element. The third lens element is made of glass having an Abbe number greater than 60.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: January 2, 2018
    Assignee: GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD.
    Inventors: Matthew Bone, Yanxuan Yin, Guangyun Li, Feng Chen
  • Patent number: 9842568
    Abstract: A color gamut controlling device and a display device including the color gamut controlling device. The color gamut controlling device includes a light sensing unit, a first calculation unit, a second calculation unit, and a color gamut calculation unit. The light sensing unit measures a luminance of external light. The first calculation unit calculates adjusted tristimulus values for each of three primary colors based on the measured luminance. The second calculation unit calculates final tristimulus values for each of the three primary colors using the adjusted tristimulus values and target tristimulus values for each of the three primary colors. The color gamut calculation unit calculates a corrected color gamut from the final tristimulus values. The light sensing unit may further measure tristimulus values of the external light for each of the three primary colors.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: December 12, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Tak Lee, Kyu-Seok Kim, Young-Nam Yun
  • Patent number: 9836659
    Abstract: In a vehicle-mounted image recognition apparatus, a resolution of an image projected on an imaging plane of an image sensor is different at a position away from a center between a circumferential direction and a radial direction. To make a circumferential resolution higher than a radial resolution, at least a lower half of the imaging plane is located closer to a circumferential focus than a middle of a radial focus and the circumferential focus at a position off the optical axis center of the image projected on the image sensor through the image-forming optical system. This is achieved by adjusting the position of the imaging plane when manufacturing or by selecting a lens with high circumferential resolution. This apparatus improves recognition accuracy in recognizing traffic lanes without using an expensive lens exhibiting high resolution both in the circumferential direction and in the radial direction.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: December 5, 2017
    Assignees: NIDEC COPAL CORPORATION, NIDEC ELESYS CORPORATION
    Inventors: Yuta Nakamura, Yohei Nagai, Yushi Takehara, Naoya Takeda
  • Patent number: 9772477
    Abstract: A projection zoom lens is constituted essentially by: a plurality of lens groups that include at least two lens groups that move when changing magnification; the distances among all pairs of adjacent lens groups changing when changing magnification; the reduction side being configured to be telecentric; and a negative first lens group, which is fixed when changing magnification, being provided most toward the magnification side. The first lens group is constituted essentially by, in order from the magnification side to the reduction side, a negative first lens, which is a meniscus lens having a convex surface toward the magnification side, a biconcave second lens, and a positive or negative third lens. Conditional Formula (1) related to fw, which is the focal length of the entire projection zoom lens at the wide angle end, and f3, which is the focal length of the third lens, is satisfied: ?0.070<fw/f3<0.070??(1).
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: September 26, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Masaru Amano
  • Patent number: 9746653
    Abstract: An imaging lens is constituted by, in order from the object side to the image side: a first lens group having a negative refractive power; a second lens group having a positive refractive power; a stop; and a third lens group having a positive refractive power or a negative refractive power. The first lens group has at least two positive lenses, a first positive lens from among the at least two positive lenses being positioned most toward the object side, and three negative lenses being consecutively provided adjacent to the first positive lens at the image side thereof. The first lens group is fixed with respect to an imaging surface, and focusing operations are performed by moving the second lens group and the third lens group.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: August 29, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Ping Sun
  • Patent number: 9690082
    Abstract: A wide-angle projection lens includes a first lens group with negative refractive power, a second lens group with positive refractive power and a third lens group with positive refractive power, all of which are arranged in order from a projection side to an image source side along an optical axis. The third lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in order from the projection side to the image source side along the optical axis, wherein the third lens and the fourth lens are cemented together to form a cemented lens and there is no air gap between the third lens and the fourth lens.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: June 27, 2017
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.
    Inventor: Tsan-Haw Lee
  • Patent number: 9632397
    Abstract: Since a relay optical system includes double gauss lenses and pairs of meniscus lenses disposed so as to be convex toward the double gauss lenses, it is possible to sufficiently minimize the occurrence of aberration from dimming light valves to color modulation light valves, to maintain an image formation state with high performance, and further to form a favorable image.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: April 25, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Makoto Otani
  • Patent number: 9557538
    Abstract: A projection zoom lens constituted by: a negative first lens group; a positive final lens group; and moving lens groups between the first and the final lens groups that move independently while changing magnification, satisfies the conditional formulae below: 1.00<(Rf2?Rr2)/(Rf2+Rr2)??(1) 0.00?(Rr2?Rf3)/(Rr2+Rf3)<0.15??(2) 2.5<Bf/Im???(9) wherein Rf2 and Rr2 respectively are the radii of curvature of the front and rear surfaces of the second lens from the magnification side within the most reduction side moving lens group, Rf3 is the radius of curvature of the front surface of the third lens from the magnification side within the most reduction side moving lens group, Bf is the back focus of the entire system at the reduction side at the wide angle end as an air converted length, and Im? is the maximum effective image circle diameter at the reduction side.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: January 31, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Amano, Yukiko Nagatoshi, Masanao Kawana
  • Patent number: 9507125
    Abstract: An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: November 29, 2016
    Assignee: KANTATSU CO., LTD.
    Inventor: Masaya Hashimoto
  • Patent number: 9488806
    Abstract: A photographic lens optical system includes: a first lens having a positive refractive power and a meniscus shape convex toward an object side; a second lens having a negative refractive power and a meniscus shape convex toward the object side; a doublet lens having a positive refractive power and formed by combining a third lens and a fourth lens; a fifth lens having a positive refractive power and a double convex shape; and a sixth lens having a positive refractive power and a double convex shape. The first to sixth lenses are sequentially arranged in a direction from the object side to an image side, and the photographic lens optical system satisfies the following condition: 1.5<Nd2<1.7 where Nd2 denotes a refractive index of the second lens.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: November 8, 2016
    Assignee: KOLEN CO., LTD.
    Inventors: Jae Hoon Cho, Chi Ho Ahn, Ji Eun Kim, Se Jin Kim, Seong Hee Bae
  • Patent number: 9482936
    Abstract: A projector includes a light source device, a diffraction element that converts light from the light source device into 0-th order light and diffracted light, a light modulation device that modulates the diffracted light so as to form image light, and a projection optical system that emits projected light having a chief ray which is tilted with respect to an optical axis of the image light incident from the light modulation device. Defining a reference plane as a plane which is perpendicular to a plane including the optical axis and a chief ray of the projected light and includes the optical axis, a plane including an optical axis of the 0-th order light and a chief ray of the diffracted light intersects the reference plane.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: November 1, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Egawa, Shigeo Nojima
  • Patent number: 9470873
    Abstract: The imaging lens substantially consists of a first lens group having a positive refractive power and a second lens group having a positive refractive power, in which the entire second lens group moves along the optical axis to perform focusing. In the imaging lens, the first lens group comprises a positive first lens, a negative second lens, a negative third lens, a positive fourth lens, and a positive fifth lens in this order from the object side. When the Abbe number of the second lens with respect to the d-line is ?d2 and the Abbe number of the third lens with respect to the d-line is ?d3, conditional formula (1) below is satisfied: 2.0<?d2/?d3??(1).
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: October 18, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Taro Asami
  • Patent number: 9465202
    Abstract: A wide angle lens consists of a negative first lens group, a positive second lens group, a stop, and a positive third lens group in order from the object side. The first lens group includes two negative meniscus lenses, each with a convex surface on the object side. The second lens group includes one pair of cemented lenses. The third lens group includes two pairs of cemented lenses and at least one aspherical surface.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: October 11, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Takashi Suzuki, Kenichi Sato, Taiga Noda
  • Patent number: 9454070
    Abstract: In a projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system includes a refractive optical system and a reflective optical system having negative refractive power in this order from a reduction side. Further, the following conditional formula (1) is satisfied: L/D+2?min/?max?1.01??(1).
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: September 27, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Tomoyuki Baba, Masanao Kawana, Masaru Amano, Takeshi Kamiya
  • Patent number: 9442358
    Abstract: In a projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system includes a refractive optical system and a reflective optical system having negative refractive power in this order from a reduction side. Further, the following conditional formula (1) is satisfied: ?0.0015?(1/tan(?max)?0.16)×(?L/?M?0.27) ??(1).
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: September 13, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Tomoyuki Baba, Masanao Kawana, Masaru Amano, Takeshi Kamiya
  • Patent number: 9429767
    Abstract: An imaging optical system includes a front lens group including a front lens element and a reflector element which reflects a light bundle that exits from the front lens element; and a rear lens group on the image side of the front lens group. The front lens element is a spherically-swingable lens group which suppresses image shake by spherically-swinging about a predetermined spherical-swing center in accordance with vibrations applied to the imaging optical system. The following conditions (1) and (2) are satisfied: ?d>58??(1), and f/y>3??(2), wherein ?d designates the Abbe number with respect to the d-line of at least one lens element of the spherically-swingable lens group, f designates the focal length of the imaging optical system, in a state where the focal length is at a maximum, and y designates the maximum image height of the imaging plane.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: August 30, 2016
    Assignee: HOYA CORPORATION
    Inventor: Yutaka Takakubo
  • Patent number: 9423599
    Abstract: A projection zoom lens in which a magnification change operation is performed by moving three to four lens groups as moving groups, wherein a first lens group, which is a lens group on the most-magnification side, substantially consists of a moving group having a negative refractive power; a lens group on the most-reduction side is composed of a moving group having a positive refractive power; and the first lens group which is the lens group the most-magnification side substantially consists of two lenses. In this case, conditional formula (1) below is satisfied, where fw is the focal length of the entire system at the wide angle end and fm is the focal length of the lens group on the most-magnification side: ?3.5<fm/fw<?1.0??(1). This achieves miniaturization and cost reduction, and corrects various aberrations satisfactorily.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 23, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Masaru Amano
  • Patent number: 9417441
    Abstract: A projection optical system, in order from a magnification side to a demagnification side, comprising a negative first lens unit, a positive second lens unit, a positive third lens unit, a fourth lens unit, a fifth lens unit, and a sixth lens unit, wherein the second and third lens units move along an optical axis in zooming, the first lens unit moves along the optical axis in focusing, and the conditions: ?0.55<fW/f1<?0.30 and 1.9<f123T/f123W<fT/fW (f1: focal length of first lens unit, f123W: composite focal length of first, second and third lens units at wide-angle limit, f123T: composite focal length of first, second and third lens units at telephoto limit, fW: focal length of entire system at wide-angle limit, fT: focal length of entire system at telephoto limit) are satisfied.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: August 16, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Kyoichi Miyazaki
  • Patent number: 9411246
    Abstract: Projection optics for a lithographic projection system is provided that comprises a spatial light modulator (SLM) from which radiation is reflected and directed to a projection lens that projects the radiation to a substrate. The SLM is illuminated by non telecentric off axis illumination (e.g. from laser radiation that has a spectral bandwidth of the order of 1 picometer, and the projection optics is configured for significant reduction (e.g. at least 10× reduction, 20× reduction, or 50× reduction).
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 9, 2016
    Assignee: Nikon Corporation
    Inventor: David Michael Williamson
  • Patent number: 9411135
    Abstract: An imaging optical system includes sequentially from an object side a front group configured to include a positive lens disposed at a position nearest a diaphragm; the diaphragm; and a rear group configured to include a negative lens disposed at a position nearest the diaphragm. The imaging optical system satisfies a conditional expression (1) 0.27?|?3/?2|?1.80, where ?3 represents temperature-dependent variation of relative refractive index for d-line of the negative lens and ?2 represents temperature-dependent variation of relative refractive index for d-line of the positive lens.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: August 9, 2016
    Assignee: TAMRON CO., LTD.
    Inventor: Kotaro Jojiki
  • Patent number: 9348118
    Abstract: An optical system includes, in order from an enlargement conjugate side to a reduction conjugate side via a largest air gap, a front unit having a negative power, and a rear unit having positive power. The optical system satisfies 1.75<Ndn1<2.05, 0.02<?gFn1?(0.6438?0.001682×?dn1)<0.08, and 2.5<|fn1/F|<5.0, where fnl represents a focal length of a negative lens in the front unit, Ndnl represents a refractive index of a material of the negative lens, ?dn1 represents an Abbe number of the material of the negative lens, ?gFn1 represents a partial dispersion ratio of the material of the negative lens, and F represents a focal length of the optical system.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 24, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuuki Maeda
  • Patent number: 9348124
    Abstract: A projection lens is a zoom lens and formed of a first group to an N-th group sequentially arranged from an image enlargement side (that is, screen side), where N is 6 or 7. The first group includes a first A group and a first B group sequentially arranged from the image enlargement side. The first A group is formed of two positive lenses, and the first B group is formed of a cemented lens formed of a positive lens and a negative lens. The second group includes at least two negative lenses. In magnification changing action, at least the first group and the N-th group are fixed, and at least the third group to the (N?1)-th group are moved along an optical axis. In focusing action, the first A group on the image enlargement side in the first group is solely moved along the optical axis.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: May 24, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koji Shiokawa
  • Patent number: 9323032
    Abstract: A variable magnification projection optical system substantially consisting of two lens groups of a first lens group having a positive refractive power and is moved during magnification change, and a second lens group having a positive refractive power and is moved during magnification change, in which the variable magnification projection optical system is configured such that the reduction side is telecentric.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: April 26, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Masaru Amano
  • Patent number: 9298070
    Abstract: A projector is associated with a head gear for a first participant of collaboration. The head gear does not obstruct the participant's eyes. The projector is configured to receive an image which was created with respect to a first participant's view point based on a dataset that represents an object. The projector is configured for projecting the received image onto a display surface. The first participant perceives the projected image by receiving at least a portion of diffused light associated with the projected image at the first participant's eye that is closest to the projector.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: March 29, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Nelson Liang An Chang
  • Patent number: 9294667
    Abstract: A MEMS auto focus miniature camera module includes an image sensor and an optical train including at least one movable lens and one or more fixed lenses or fixed lens groups on either side of the movable lens. The movable lens provides an auto focus feature of the camera module. A MEMS actuator translates the movable lens through an auto focus range to adjust focus.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: March 22, 2016
    Assignee: DigitalOptics Corporation
    Inventors: Ariel Lipson, Uri Kinrot, Dalit Bahar, Moshe Kriman, Moshe Levy, Ocie Ward, Mark Harland
  • Patent number: 9182524
    Abstract: An autostereoscopic apparatus for providing a 3D image to a viewer at a range of vertical eye locations. The apparatus includes a projection screen with a light receiving surface that is horizontally retroreflective and vertically diffusive. The apparatus includes a projector assembly including at least two projectors arranged side-by-side such that projection lenses of the projectors are horizontally aligned in a row. The apparatus includes a controller selectively operating the projectors to project at least two differing point-of-view images. The projection screen may take a number of useful embodiments to implement the autostereoscopic apparatus. For example, the projection screen may include a bottom layer including a retroreflective film that is retroreflective at least in the horizontal direction such as a brightness enhancement film and a top layer formed of a transparent sheet of lenticular material arranged for vertical diffusing.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: November 10, 2015
    Assignee: DISNEY ENTERPRISES, INC.
    Inventors: Quinn Smithwick, Lanny S. Smoot, Daniel Reetz
  • Patent number: 9128271
    Abstract: A super wide angle lens substantially consists of a positive first lens group in which a positive first lens, a negative second lens, a negative third lens, a negative fourth lens, a positive fifth lens, a sixth lens unit that is a cemented lens, a seventh lens, an aperture stop, and an eighth lens unit that is a cemented lens are arranged in this order from an object side, a second lens group in which a first lens unit that is a positive single lens or a cemented lens and a second lens unit that is a cemented lens are arranged in this order from the object side, and a third lens group including a positive lens. The super wide angle lens is structured in such a manner to satisfy conditional formula (1): 0.8<(T16+T17)/f<2.5.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: September 8, 2015
    Assignee: FUJIFILM CORPORATION
    Inventors: Yasutaka Shimada, Michio Cho
  • Patent number: 9122046
    Abstract: An imaging lens including the first˜fifth lens arranged in sequence from an object side to an image side is provided. The first lens has at least one aspheric surface. The second lens with negative optical power has at least one aspheric surface and a convex surface facing towards the object side. The third lens with positive optical power has at least one aspheric surface and a concave surface facing towards the object side. The fourth lens with negative optical power has at least one aspheric surface and a concave surface facing towards the image side. The fifth lens with positive optical power has at least one aspheric surface and a convex surface facing towards the object side. By the above arrangement, the imaging lens has a shorter optical total length and a larger aperture for enhancing the image quality.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: September 1, 2015
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., Asia Optical International Ltd.
    Inventor: Yuan-Fan Liang
  • Patent number: 9063439
    Abstract: A projection objective for applications in microlithography, a microlithography projection exposure apparatus with a projection objective, a microlithographic manufacturing method for microstructured components, and a component manufactured using such a manufacturing method are disclosed. The projection objective includes an optical component configured so that, during use of the projection objective, the optical component generates a stray light component in the exposure field of the projection objective which adapts a parameter of the projection objective to a parameter of a second projection objective. The parameter is the stray light component at the exposure field of the projection objective and/or a variation of the stray light component at the exposure field of the projection objective.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: June 23, 2015
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Aksel Goehnermeier, Daniel Kraehmer, Vladimir Kamenov, Michael Totzeck
  • Publication number: 20150116840
    Abstract: A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group.
    Type: Application
    Filed: June 23, 2014
    Publication date: April 30, 2015
    Inventors: YI-HSUEH CHEN, HSIN-HUNG LIN, CHUN-TUNG WU, KUN-YAO CHEN
  • Patent number: 9019597
    Abstract: The invention proposes a short-distance front projection system, that is to say with a wide angle, occupying a small volume and offering a possibility of focusing as well a zoom function. It makes it possible to obtain images with a diagonal greater than 2 meters, the whole of the optical system being at least 50 cm from the plane of the image. This projector is constructed on the basis of three optical elements: an ocular, an afocal lens system and a final group forming an objective intended to form the intermediate image in front of the mirror.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: April 28, 2015
    Assignee: Optinvent
    Inventors: Pascal Benoit, Guilhem Dubroca, Khaled Sarayeddine
  • Patent number: 9013798
    Abstract: A projection lens disposed between an enlarged side and a reduced side is provided. The projection lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from the enlarged side to the reduced side. Refractive powers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively negative, positive, positive, negative, positive and positive. A focal length of the third lens is greater than or equal to 20 mm and is less than or equal to 200 mm. An optical engine is also provided.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 21, 2015
    Assignee: Coretronic Corporation
    Inventor: Tao-Hung Kuo
  • Patent number: 9001429
    Abstract: In an optical system for projection that is telecentric on a reduction side, a correction lens group substantially consisting of a part of lens groups in the optical system for projection is configured to move in the direction of an optical axis to correct a shift in a focal position caused by a change in temperature, and predetermined conditional formulas are satisfied.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 7, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Yukiko Nagatoshi
  • Patent number: 8995062
    Abstract: Projection lens having improved properties such as a high throughput are described. In one embodiment, a projection lens is described comprising in sequential order from a screen side a first lens group, a second lens group of positive refractive power, and a third lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the projection lens (F) to the focal length of each of the lens groups (F1, F2, and F3) is such that |F1/F|>5, 0.5<|F2/F|<0.9, and 1<F3/F<8. In another embodiment, a projection lens is described comprising in sequential order from a screen side a first lens group, a second lens group of positive refractive power, and a third lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the projection lens (F) to the focal length of each of the lens groups (F1, F2, and F3) is such that |F1/F|>5, 0.5<|F2/F|<2.0, and 1.4<F3/F<8.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: March 31, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Zhisheng Yun, Stephen J. Willett
  • Patent number: 8982473
    Abstract: The present invention uses the concave hybrid architecture to form a wide angle projection lens with large numerical aperture. The wide angle projection lens includes a refraction system and a reflection system, wherein the refraction system includes a first lenses group containing a plurality of spherical lenses and at least one spherical lenses, and a second lenses group containing at least two aspheric lenses and at least one spherical lens, and the at least one spherical lens is configured between any two of the at least two aspheric lenses. The present invention is beneficial in reducing the wide angle projection lens in size and is able to effectively overcome the problem in low geometric efficiency, and enable the ultra-short focus projector have compact and portable advantages.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 17, 2015
    Assignee: Young Optics, Inc.
    Inventors: Ya-Ling Hsu, Zhan-Yu Liu
  • Patent number: 8976454
    Abstract: A variable-magnification projection optical system substantially consists of a negative first lens group that is disposed at the most enlargement-side position and is fixed during magnification change, a positive last lens group that is disposed at the most reduction-side position and is fixed during magnification change, and a plurality of lens groups that are disposed between the first lens group and last lens group and are moved during magnification change. The lens groups that are moved during magnification change substantially consist of three lens groups, wherein the most enlargement-side lens group is a negative lens group. Predetermined conditional expressions relating to a back focus of the entire system on the reduction side at the wide-angle end, a focal length of the entire system at the wide-angle end, a focal length of the last lens group, and a focal length of the first lens group are satisfied.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: March 10, 2015
    Assignee: Fujifilm Corporation
    Inventors: Yukiko Nagatoshi, Akiko Nagahara
  • Patent number: 8976455
    Abstract: A variable-magnification projection optical system substantially consists of a negative first lens group that is disposed at the most enlargement-side position and is fixed during magnification change, a positive last lens group that is disposed at the most reduction-side position and is fixed during magnification change, and a plurality of lens groups that are disposed between the first lens group and last lens group and are moved during magnification change. The most enlargement-side lens group (the second lens group) of the lens groups that are moved during magnification change has a negative refractive power. Predetermined conditional expressions relating to a back focus of the entire system on the reduction side at the wide-angle end, a focal length of the entire system at the wide-angle end, a focal length of the second lens group and a focal length of the last lens group are satisfied.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: March 10, 2015
    Assignee: Fujifilm Corporation
    Inventors: Akiko Nagahara, Yukiko Nagatoshi
  • Patent number: 8970964
    Abstract: A projection objective lens system includes from an object plane to an image plane: a first lens group (S1) with a positive refractive power; a second lens group (S2) with a negative refractive power; a third lens group (S3) with a positive refractive power; a fourth lens group (S4) with a negative refractive power; and a fifth lens group (S5) with a positive refractive power being divided into two sub-lens groups. An aperture stop (AS) is provided between the two sub-lens groups. The following conditions are met: 0.12<|L/f|<0.4, and ?R/R<1%, wherein, f is an effective focal length of the system, L is a distance between the object and image planes, ?R represents a difference between radii at the aperture stop of a marginal field beam bundle and a central field beam bundle, and R represents a radius at the aperture stop of a central field beam bundle.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: March 3, 2015
    Assignee: Shanghai Micro Electronics Equipment Co., Ltd.
    Inventor: Lirong Zhu