Optical Detail With Photoelement System Patents (Class 396/111)
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Publication number: 20120321288Abstract: An apparatus and method of adjusting an auto focus are provided. The apparatus includes: an imaging pickup device for generating an image signal by capturing light passing through an imaging lens; a shutter for controlling light exposure of the image pickup device; a focus detector that calculates a contrast value from the image signal and detecting a focus from the contrast value; and a release controller for controlling a release operation constituting a photographing operation of a still image, wherein the release controller includes, as driving modes, a first mode that directs a focus lens included in the imaging lens to be driven while driving the shutter, and a second mode that directs the focus lens not to be driven while driving the shutter. Accordingly, a photographing time is reduced.Type: ApplicationFiled: November 23, 2011Publication date: December 20, 2012Applicant: Samsung Electronics Co., Ltd.Inventors: Kenji ISHIBASHI, Masataka HAMADA
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Patent number: 8315513Abstract: A focus detection apparatus that measures, in advance, and stores shading coefficients for light sources of different types, and in a focus detection operation, generates light source information for determining a light source that irradiates an object based on outputs from a plurality of photometry sensors with different spectral characteristics and switches the shading coefficient of a focus detection sensor among shading coefficients stored according to the light source information.Type: GrantFiled: April 21, 2010Date of Patent: November 20, 2012Assignee: Canon Kabushiki KaishaInventor: Takashi Ichimiya
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Patent number: 8310590Abstract: An image sensor includes: image-capturing pixels that generate first image signals with a charge storage time controlled by a first storage control signal; and focus detection pixels that generate second image signals with a charge storage time controlled by a second storage control signal generated independently of the first storage control signal.Type: GrantFiled: September 24, 2007Date of Patent: November 13, 2012Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Publication number: 20120195580Abstract: A range-finding device includes: a plurality of image capturing elements that are provided at a predetermined interval; a lens that forms an image of a range-finding object on each of the image capturing elements; a distance calculating unit that calculates a distance to the range-finding object for each of a plurality of range-finding areas that are set on the respective image capturing elements based on an image signal output from each of the range-finding areas according to the image that is formed; a distribution generating unit that generates a distribution of the calculated distances; and a position specifying unit that specifies a position where the range-finding object is present in the range-finding area based on the distribution of the distances.Type: ApplicationFiled: January 5, 2012Publication date: August 2, 2012Inventor: Kei ITOH
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Patent number: 8218962Abstract: An image-capturing apparatus includes an image-capturing optical system; a sensor unit having line sensors that receive light fluxes of an object, which have been transmitted through a pair of partial areas in an exit pupil of the image-capturing optical system; image-capturing elements having a pixel arrangement capable of generating an image signal and a focus detection pixel sequence, in which two or more pairs of pixels that receive the light fluxes of an object, are arranged in a predetermined direction; a continuous image-capturing unit configured to perform continuous image capturing of actually exposing the image-capturing elements; a signal generation unit configured to perform another exposure for the sensor unit; a first focus detection unit configured to perform focus detection of a phase-difference detection method; a second focus detection unit configured to perform focus detection; and a focus adjustment unit configured to perform focus adjustment.Type: GrantFiled: November 25, 2008Date of Patent: July 10, 2012Assignee: Sony CorporationInventors: Shinichi Fujii, Norihiko Akamatsu
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Patent number: 8184197Abstract: Disclosed are a focus detecting apparatus capable detection in various light illumination conditions and an image acquiring apparatus having the same. The focus detecting apparatus may include a mark disposed on a primary image plane. A pair of images of the mark is detected by a sensor, the distance between which images is used to determine the main wavelength of the light received from a subject. The main wavelength is used in determining the chromatic aberration correction by which the defocus amount may be adjusted.Type: GrantFiled: October 13, 2009Date of Patent: May 22, 2012Assignee: Samsung Electronics Co., LtdInventors: Shitao Deng, Kyong-Tae Park
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Patent number: 8179462Abstract: The present invention relates to an imaging unit including an imaging device for performing photoelectric conversion. There is provided an imaging unit with which the mechanical strength of an imaging device can be ensured while allowing light to pass through the imaging device so as to improve the usability in various operations using the imaging device. An imaging unit (1) includes a substrate (11a), a light-receiving portion (11b) provided on the substrate (11a), an imaging device (10) configured to photoelectrically convert light received by the light-receiving portion (11b) into an electric signal while light is allowed to pass through the imaging device (10), and a glass substrate (19) bonded to the imaging device (10) and allowing light to pass therethrough.Type: GrantFiled: October 27, 2009Date of Patent: May 15, 2012Assignee: Panasonic CorporationInventors: Dai Shintani, Takanori Yogo
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Patent number: 8175447Abstract: The image pickup apparatus includes an image pickup element including first pixels for photoelectrically converting an object image formed by a light flux from an image taking optical system and second pixels for photoelectrically converting optical images formed by light fluxes divided form the light flux from the image taking optical system, and a controller performing focus detection based on a phase difference of the optical images, control of an aperture stop included in the image taking optical system and an image capturing operation for generating a captured image by using signals obtained from the first pixels. The controller increases, when an image capturing aperture size of the aperture stop is smaller than a focus detecting aperture size in a case of performing the focus detection between the image capturing operations in continuous image capturing, the aperture size to the focus detecting aperture size in the focus detection.Type: GrantFiled: July 12, 2010Date of Patent: May 8, 2012Assignee: Canon Kabushiki KaishaInventor: Kan Takaiwa
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Patent number: 8164642Abstract: An image-capturing device includes: a destructive read-type image sensor that executes photoelectric conversion of a light flux from an optical system at a plurality of pixels, stores electrical charges resulting from the photoelectric conversion at the plurality of pixels, and outputs a signal corresponding to each of the stored electrical charges; a read unit that reads out the signal from the image sensor over a specific cycle; a display unit at which display is brought up based upon the signal read out by the read unit each time the read unit reads out the signal; a storage unit that individually stores signals read out by the read unit, each in correspondence to a read operation; an adding unit that adds up a plurality of signals obtained sequentially over time among the signals stored in the storage unit; and a focus detection unit that detects a focus adjustment state of the optical system based upon adding results provided by the adding unit.Type: GrantFiled: September 24, 2007Date of Patent: April 24, 2012Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Publication number: 20120082443Abstract: The camera includes a field lens into which light from the image taking optical system enters, a conductive lens holding member holding the field lens, a conductive member electrically connected with the lens holding member, a secondary image-forming lens causing the light from the field lens to form plural optical images, a light-receiving element converting the plural optical images into electric signals, a focus detection part detecting a focus state of the image taking optical system by using the electric signals, and a conductive camera chassis. A coating having a light transmissive property and a conductive property is provided on an entrance surface of the field lens. The coating is electrically connected with the camera chassis through the conductive member and the lens holding member.Type: ApplicationFiled: September 27, 2011Publication date: April 5, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Hideaki Yamamoto
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Patent number: 8135272Abstract: An image pick-up apparatus which is capable of increasing an AF area is provided. The image pick-up apparatus includes a photographing lens to focus light received from a subject, a main mirror that passes a portion of light passing through the photographing lens and that reflects the remaining portion of the light, an auto focus module to detect the state of focus the photographing lens and a sub-mirror having a plurality of reflective areas that reflect respectively divided portions of the light passing through the main mirror and that guide the divided light portions to the auto focus module.Type: GrantFiled: September 16, 2009Date of Patent: March 13, 2012Assignee: Samsung Electronics Co., LtdInventors: Kyong-Tae Park, Shitao Deng
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Patent number: 8115814Abstract: An apparatus and method to track and to photograph a mobile object over a wide range, by a cooperative operation of multiple cameras. In addition, a mobile tracking system is provided for tracking the mobile object by the cooperation of multiple cameras, in which each camera includes a photographing device which photographs and recognizes the mobile object, a changing device which changes a view angle of the photographing device, a position deriving device which derives a position of the camera, a distance deriving device which derives the distance between the camera and the mobile object, and a communication device which transmits an identifier of the camera, a position of the camera, a moving direction of the mobile object and the distance between the camera and the mobile object to another camera and receives an identifier of the other camera, a position of the other camera, a moving direction of the mobile object and a distance between the other camera and the mobile object from the other camera.Type: GrantFiled: September 9, 2005Date of Patent: February 14, 2012Assignee: Canon Kabushiki KaishaInventors: Yoshihiko Iwase, Masaaki Imaizumi
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Publication number: 20120033957Abstract: A distance measurement and photometry device includes a pair of distance measurement sensors each of which is a two-dimensional image sensor, a photometry sensor, which includes a two-dimensional image sensor, a pair of distance measurement lenses arranged to correspond to the pair of distance measurement sensors, a photometry lens arranged to correspond to the photometry sensor, a photometry process unit that calculates a brightness value of a subject, an exposure state setting unit that sets an exposure state correspond to at least the pair of distance measurement sensors, a distance measurement unit that measures a distance to the subject, wherein the exposure state setting unit alternates an exposure state of at least the pair of distance measurement sensors corresponding to a result of the photometry process unit.Type: ApplicationFiled: July 29, 2011Publication date: February 9, 2012Inventor: Kei ITOH
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Patent number: 8077255Abstract: An imaging apparatus capable of performing phase difference detection while allowing light to enter an imaging device is provided. An imaging unit (1) includes an imaging device (10) including light receiving sections (11b, 11b, . . . ) and a substrate (11a) on which the light receiving sections (11b, 11b, . . . ) are provided and which has through holes (18a, 18a, . . . ). The imaging device (10) is configured to perform photoelectric conversion on received light. The imaging unit (1) further includes a phase difference detection unit (2) configured to perform phase difference detection on received light which has passed through the imaging device (10) via the through holes (18a, 18a, . . . ).Type: GrantFiled: February 20, 2009Date of Patent: December 13, 2011Assignee: Panasonic CorporationInventors: Dai Shintani, Kenichi Honjo
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Patent number: 8077233Abstract: An imaging apparatus capable of performing phase difference detection while allowing light to enter an imaging device is provided. An imaging unit (1) includes an imaging device (10) configured to perform photoelectric conversion on received light and allow light to pass therethrough and a phase difference detection section (20) configured to perform phase difference detection on received light which has passed through the imaging device (10). The imaging device (10) includes a color-purpose light receiving section (11b, 11b, . . . ) including color filters (15r, 15g, 15b) and configured to obtain color information and an brightness-purpose light receiving section (11b, 11b, . . . ) configured to obtain brightness information and receive a larger amount of light than the color-purpose light receiving section (11b, 11b, . . . ).Type: GrantFiled: February 20, 2009Date of Patent: December 13, 2011Assignee: Panasonic CorporationInventors: Dai Shintani, Takanori Yogo
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Patent number: 8035723Abstract: Provided is a small-sized five-element image pickup lens which ensures a sufficient lens speed of about F2 and exhibits various aberrations being excellently corrected. The image pickup lens is composed of, in order from the object side, a first lens with a positive refractive power, including a convex surface facing the object side; a second lens with a negative refractive power, including a concave surface facing the image side; a third lens with a positive or negative refractive power; a fourth lens with a positive refractive power, including a convex surface facing the image side; and a fifth lens with a negative refractive power, including a concave surface facing the image side. The image-side surface of the fifth lens has an aspheric shape, and includes an inflection point at a position excluding an intersection point with the optical axis.Type: GrantFiled: August 21, 2009Date of Patent: October 11, 2011Assignee: Konica Minolta Opto, Inc.Inventors: Eigo Sano, Yuichi Ozaki
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Publication number: 20110236006Abstract: A mirror unit that can decrease the wait time before distance measurement.Type: ApplicationFiled: June 10, 2011Publication date: September 29, 2011Applicant: NIKON CORPORATIONInventor: Toshiaki KURAHASHI
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Publication number: 20110206359Abstract: The attachment lens device AL, 12 can be mounted between a master lens ML, 12 having a focusing lens group that moves in an optical axis direction for focusing purposes and a camera body 11 having an imaging device. The attachment lens device AL, 12 comprises a communication portion 35, 135 communicatable with the master lens ML, 12 and the camera body 11, a wobbling lens group LW capable of reciprocally wobbling in the optical axis direction for detecting a direction of moving the wobbling lens group, and a wobbling drive portion 125 for driving the wobbling lens group Lw.Type: ApplicationFiled: February 15, 2011Publication date: August 25, 2011Inventors: Kazuya Nishimura, Hideyuki Nagaoka
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Publication number: 20110188843Abstract: The distance measurement and photometry device includes: a case having an opening in its front surface; a rectangular lens array which is located on a front surface side of the case, which is made of a transparent resin material, and in which first and second distance measurement lenses and a photometry lens located between the distance measurement lenses are integrally formed in line; an image sensor board which is shaped like a thin plate, which is arranged on a back surface side of the case, and which is located opposed to the lens array; and two-dimensional distance measurement image sensors and photometry image sensor which are arranged on the image sensor board.Type: ApplicationFiled: January 31, 2011Publication date: August 4, 2011Inventor: Shigeru OOUCHIDA
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Patent number: 7924342Abstract: An image sensor equipped with imaging pixels disposed in a two-dimensional array, which converts an image formed through an optical system to an electrical signal, includes: first focus detection pixel groups each formed by disposing in the array of the imaging pixels a plurality of first pixels adopting a split pupil method; and second focus detection pixel groups each formed by disposing in the array of the imaging pixels a plurality of second pixels adopting a split pupil method different from the split pupil method adopted in the first pixels, and a relationship between a number of the first focus detection pixel groups and a number of the second focus detection pixel groups is determined in correspondence to directions of positions assumed by the first focus detection pixel groups and the second focus detection pixel groups relative to a center of the image sensor.Type: GrantFiled: December 13, 2007Date of Patent: April 12, 2011Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Publication number: 20100329655Abstract: An imaging apparatus which can perform phase difference detection while causing light to enter an imaging device is provided. An imaging unit (1) includes an imaging device (10) for receiving light to perform photoelectric conversion, the imaging device (10) being configured so that light passes through the imaging device (10), a phase difference detection unit (20) including a line sensor (24a) for receiving the light which has passed through the imaging device (10) to perform phase difference detection, and a condenser lens (21a), provided between the imaging device (10) and the line sensor (24a), for bending an optical path of the light which has passed through the imaging device (10) to direct the light to the line sensor (24a).Type: ApplicationFiled: February 20, 2009Publication date: December 30, 2010Inventors: Dai Shintani, Masato Murayama
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Publication number: 20100329656Abstract: An imaging apparatus capable of performing phase difference detection while allowing light to enter an imaging device is provided. The imaging unit (1) includes: an imaging device (10) configured to perform photoelectric conversion on received light and allow light to pass therethrough; a package (31) holding the imaging device (10); and a phase difference detection unit (20) configured to perform phase difference detection on received light which has passed through the imaging device (10). The package (31) has openings (31c, 31c, . . . ). Light which has passed through the imaging device (10) passes through the openings (31c, 31c, . . . ). The light which has passed through the imaging device (10) passes through the package (31) via the openings (31c, 31c, . . . ), and enters the phase difference detection unit (20).Type: ApplicationFiled: February 20, 2009Publication date: December 30, 2010Inventor: Dai Shintani
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Publication number: 20100310247Abstract: An image pickup apparatus includes a light-beam splitting mirror configured to transmit and reflect incident light that has entered the light-beam splitting mirror through a photographing optical system; an image sensor that receives light transmitted through the light-beam splitting mirror; an autofocus detecting unit that receives light reflected by the light-beam splitting mirror; a signal processing unit configured to process an image pickup signal of the image sensor; and a display unit configured to display an image being photographed, on the basis of an image signal obtained at the signal processing unit. In the image pickup apparatus, the light-beam splitting mirror has spectral characteristics including a reflectivity of 25% or more and 35% or less at a wavelength of 400 to 650 nm and a reflectivity of 60% or more at a wavelength of about 700 nm through optimization.Type: ApplicationFiled: May 13, 2010Publication date: December 9, 2010Applicant: Sony CorporationInventors: Yoshihiro OSHIMA, Shozo Masuda, Naoji Nada, Kazuhito Shimoda, Yasutoshi Katsuda, Hideaki Inoue, Yasuro Nakagawa
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Patent number: 7848630Abstract: An autofocus adapter is provided and includes an imaging adapter optical system placed on an optical axis of an imaging lens when the autofocus adapter is attached, and a focus state detection adapter optical system placed on an optical axis different from the optical axis of the imaging lens when the autofocus adapter is attached. The imaging adapter optical system has a light split prism for splitting subject light passing through the imaging lens into imaging subject light and the focus state detection subject light, a first lens group having a negative power as a whole and placed on the object side with respect to the light split prism, and a second lens group having a positive power as a whole and placed on the image side with respect to the light split prism. The focus state detection adapter optical system has a positive lens group having the same lens configuration as the second lens group in the imaging adapter optical system.Type: GrantFiled: March 30, 2007Date of Patent: December 7, 2010Assignee: Fujinon CorporationInventor: Satoshi Yahagi
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Patent number: 7847853Abstract: An image taking apparatus which can perform a focusing operation quickly is described. The image taking apparatus comprises a light splitting unit which splits a light flux from the image-taking lens into a plurality of light fluxes, a view finder optical system for observing an object image formed by the light flux from the image-taking lens, an image pickup element which photoelectrically converts the object image to an electric signal and a focus detection unit for detecting the focusing state of the image-taking lens according to a phase difference detection system. Here, the light splitting unit changes between a first state in which the light flux is directed to the view finder optical system and the focus detection unit and a second state in which the light flux is directed to the image pickup element and the focus detection unit.Type: GrantFiled: August 8, 2008Date of Patent: December 7, 2010Assignee: Canon Kabushiki KaishaInventor: Yasuo Suda
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Publication number: 20100290773Abstract: A focus detection apparatus that measures, in advance, and stores shading coefficients for light sources of different types, and in a focus detection operation, generates light source information for determining a light source that irradiates an object based on outputs from a plurality of photometry sensors with different spectral characteristics and switches the shading coefficient of a focus detection sensor among shading coefficients stored according to the light source information.Type: ApplicationFiled: April 21, 2010Publication date: November 18, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Takashi Ichimiya
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Patent number: 7817912Abstract: An optical system of a focus detection apparatus includes a condenser lens positioned behind an expected focal plane of a photographing lens; an auxiliary lens group positioned behind the condenser lens to be coaxial therewith; and a pair of separator lenses positioned behind the auxiliary lens group in close vicinity thereof and integrally molded from resin. An object image formed on the expected focal plane is divided into two images by the pair of separator lenses to be reformed on a pair of areas on a sensor, respectively, and the auxiliary lens group includes a negative lens element made of resin, and a positive lens element made of glass.Type: GrantFiled: May 7, 2008Date of Patent: October 19, 2010Assignee: Hoya CorporationInventor: Moriyasu Kanai
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Patent number: 7783185Abstract: An image sensor includes imaging pixels that convert an image formed via an optical system to image signals and a first focus detection pixel group and a second focus detection pixel group respectively made up with an array of first focus detection pixels and an array of second focus detection pixels, with the first focus detection pixels and the second focus detection pixels used to receive an image light flux via the optical system to detect a focus adjustment state at the optical system through a pupil division-type method. An image detection pitch of the first focus detection pixel group and an image detection pitch of the second focus detection pixel group are different from each other.Type: GrantFiled: February 9, 2007Date of Patent: August 24, 2010Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Patent number: 7773875Abstract: Provided is an auto-focusing camera module having a liquid lens. The auto-focusing camera module includes a lens barrel having a liquid lens and a solid lens stacked and disposed therewith; an image sensor for focusing light that is passed through the liquid lens and the solid lens; a substrate provided in a lower end of the lens barrel to electrically mount the image sensor; and a power supply unit fixed integrally in the lens barrel and electrically coupled between the liquid lens and the substrate to apply a power source to the liquid lens. Therefore, the auto-focusing camera module may be useful to control its focus to coincide with high pixels and high performances of the camera module, manufacture a small final product by lowering the entire height of the camera module, enhancing the productivity of the camera module by employing a simple liquid lens to simplify an assembly structure of the liquid lens that is in contact with the substrate, and reduce the manufacturing cost.Type: GrantFiled: April 25, 2008Date of Patent: August 10, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Moon Sik Jung, Tae Young Kim
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Publication number: 20100189428Abstract: Goal: Providing a mirror unit that can decrease the wait time before distance measurement.Type: ApplicationFiled: January 25, 2010Publication date: July 29, 2010Applicant: NIKON CORPORATIONInventor: Toshiaki Kurahashi
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Patent number: 7751700Abstract: A focus adjustment device includes an image sensor that includes imaging pixels for capturing an image formed via an imaging optical system and focus detection pixels for detecting a focus adjustment state at the imaging optical system through a first pupil division-type image shift detection method, a focus detector that detects a focus adjustment state at the imaging optical system through a second pupil division-type image shift detection method different from the first pupil division-type image shift detection method, and a focus adjustment controller that executes focus adjustment for the imaging optical system based upon the focus adjustment states detected by the image sensor and the focus detector.Type: GrantFiled: January 26, 2007Date of Patent: July 6, 2010Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Patent number: 7747156Abstract: A digital single-lens reflex camera includes a first mirror for reflecting part of a light beam coming from a subject through a photographing optical system and transmitting the remaining light beam. The reflected light beam is used for detecting the focus state of an imaging light beam, and the transmitted light beam is used for performing live view display. For example, the first mirror can be configured as a movable mirror in the digital single-lens reflex camera. This enables continuous live view display using the transmitted light beam on condition that the movable mirror is down while detecting the focus state using the reflected light beam. In addition, phase-contrast AF can be adopted for detecting the focus state.Type: GrantFiled: July 17, 2006Date of Patent: June 29, 2010Assignee: Olympus Imaging Corp.Inventors: Masami Takase, Fujio Kosaka
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Patent number: 7715703Abstract: An image sensor includes: image capturing pixels and focus detection pixels disposed together on a single substrate; and adjacent pixels that are not equipped with a photoelectric conversion unit and are disposed adjacent to the focus detection pixels.Type: GrantFiled: December 27, 2006Date of Patent: May 11, 2010Assignee: Nikon CorporationInventors: Ken Utagawa, Yosuke Kusaka
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Patent number: 7711261Abstract: An imaging device includes an image sensor and an estimating circuit. The image sensor includes a plurality of pixel units disposed in a two-dimensional array, each equipped with a plurality of imaging pixels with varying spectral sensitivity characteristics set regularly, and focus detection pixels with sensitivity over a range encompassing the spectral sensitivity of the pixel units. The estimating circuit determines an image output structure corresponding to the position of each focus detection pixel based upon outputs from the imaging pixels present around the focus detection pixel and estimates the image output at the focus detection pixel based upon the image output structure and the output from the focus detection pixel.Type: GrantFiled: February 9, 2007Date of Patent: May 4, 2010Assignee: Nikon CorporationInventor: Yosuke Kusaka
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Publication number: 20100104271Abstract: An image pick-up apparatus which is capable of increasing an AF area is provided. The image pick-up apparatus includes a photographing lens to focus light received from a subject, a main mirror that passes a portion of light passing through the photographing lens and that reflects the remaining portion of the light, an auto focus module to detect the state of focus the photographing lens and a sub-mirror having a plurality of reflective areas that reflect respectively divided portions of the light passing through the main mirror and that guide the divided light portions to the auto focus module.Type: ApplicationFiled: September 16, 2009Publication date: April 29, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyong-Tae PARK, Shitao Deng
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Patent number: 7702229Abstract: A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.Type: GrantFiled: October 18, 2006Date of Patent: April 20, 2010Assignee: Eastman Kodak CompanyInventors: Lynn Schilling-Benz, John N. Border, Thomas F. Powers, Russell J. Palum
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Patent number: 7689111Abstract: An optical apparatus is disclosed which can reliably form AF images and split the AF images to provide excellent focus detection performance in the phase difference detection method. The optical apparatus comprises a light deflection unit including a deflection optical member. The deflection optical member deflects at least one of a first luminous flux and a second luminous flux relative to the other, the first and second luminous fluxes passing through a first area and a second area in the exit pupil of an optical system, respectively, and forming images on a photoelectrical conversion element. The light deflection unit comprises a light-limiting member which limits an image-forming area where at least one of the first and second luminous fluxes emerging from the light deflection unit forms the image on the photoelectrical conversion element.Type: GrantFiled: November 1, 2006Date of Patent: March 30, 2010Assignee: Canon Kabushiki KaishaInventors: Makoto Takamiya, Ichiro Onuki
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Patent number: 7616879Abstract: There is provided an optical apparatus that provides quick and precise TTL phase difference detection and pupil slicing focus detection. An optical apparatus includes a first optical element for splitting a first polarized light component contained in light that passes an exit pupil of a first optical system and directs to a photoelectric conversion element so that the first polarized light component direct to different light-receiving areas on the photoelectric conversion element. The optical apparatus may further include a second optical element for separating a second polarized light component contained in the light from said first optical element, from the first polarized light component.Type: GrantFiled: October 5, 2005Date of Patent: November 10, 2009Assignee: Canon Kabushiki KaishaInventors: Akihiko Nagano, Makoto Takamiya, Koichi Washisu
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Patent number: 7616878Abstract: An optical apparatus is disclosed, which is suitable for the focus detection by the TTL phase difference detection method, and capable of producing a pair of phase difference images for focus detection with high accuracy. The optical apparatus comprises a deflection optical element which deflects at least one of first and second luminous fluxes with respect to the other. The first and second luminous fluxes are transmitted respectively through first and second areas of an exit pupil of an optical system, and then reach a photoelectric conversion element. The deflection direction of the luminous flux is different from the division direction of the first and second areas.Type: GrantFiled: September 1, 2005Date of Patent: November 10, 2009Assignee: Canon Kabushiki KaishaInventor: Makoto Takamiya
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Publication number: 20090238552Abstract: Disclosed is an image capturing lens system. The image capturing lens system includes an image capturing lens group having a plurality of lenses and a phase mask located in the image capturing lens group. The phase mask may satisfy phase mask functions that are defined with respect to x and y axes such that a modulation transfer function (MTF) of light is uniformized.Type: ApplicationFiled: March 20, 2009Publication date: September 24, 2009Inventors: Hyun-wook OK, Rozhkov Oleg Vladimirovich, Shirankov Alexandr Fedororvich, Joo-young Kang, Seong-deok Lee
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Patent number: 7577349Abstract: Although an area type focus detecting device for performing phase difference detection type multi point autofocus is used for high speed high precision autofocus of multi points in a wide region, there is a problem of cost increase due to the increase of the chip area. In accordance with the present invention, the photoreceiving area of a specific pixel in an area sensor is made larger than the photoreceiving area of other pixels in the same area sensor. Thus, because the sensor sensitivity is improved and the increase of the chip area is suppressed to a minimum level, a low cost high precision area type focus detecting device can be provided.Type: GrantFiled: August 7, 2006Date of Patent: August 18, 2009Assignee: Canon Kabushiki KaishaInventors: Daisuke Inoue, Hidekazu Takahashi
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Patent number: 7577348Abstract: A focus detection apparatus is disclosed, which realizes both of vertical line detection and horizontal line detection over a wide area of an image-taking range in focus detection of a phase difference detection method. The focus detection apparatus includes an optical system, which divides a luminous flux from an image-taking optical system to form a first pair of optical images having an interval between them in a first direction and a second pair of optical images having an interval between them in a second direction, and a photoelectrical conversion device. The optical system includes an optical member, which provides a first optical action widening the interval between the first pair of the optical images in the first direction. The first optical action is different from a second optical action for the second pair of the optical images in the second direction.Type: GrantFiled: June 14, 2005Date of Patent: August 18, 2009Assignee: Canon Kabushiki KaishaInventor: Ryo Yamasaki
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Patent number: 7577350Abstract: A lens apparatus configured to be mountable on a camera body having an image sensor includes a first focus lens unit, a splitting optical unit disposed between the first focus lens unit and the image sensor, a second focus lens unit disposed between the splitting optical unit and the image sensor, the second focus lens unit being movable from an initial position along an optical axis to vary a focusing state, a focusing state detection unit configured to detect the focusing state using a light flux from the splitting optical unit, an actuator configured to drive the first focus lens unit, and a controller configured to control driving of the actuator according to an output from the focusing state detection unit. The controller stops driving of the actuator if the second focus lens unit is located at a position different from the initial position.Type: GrantFiled: March 22, 2007Date of Patent: August 18, 2009Assignee: Canon Kabushiki KaishaInventor: Tomoyuki Nakamura
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Patent number: 7561789Abstract: A method for operating an autofocus system for focusing an image on an electronic imager includes providing an adjustable lens system defining an optical path for scene light and having at least one movable lens to focus an image of the scene onto the electronic imager; and causing a first portion of the scene light to be obscured so that the electronic imager captures a first autofocus image and causing a second different portion of the scene light to be obscured so that the electronic imager captures a second autofocus image wherein portions of the first and second autofocus images are offset. The method further includes moving the movable lens to a position so that an image to be captured will be in focus.Type: GrantFiled: June 29, 2006Date of Patent: July 14, 2009Assignee: Eastman Kodak CompanyInventors: John N. Border, Russell J. Palum, Bruce H. Pillman, Lynn Schilling-Benz
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Patent number: 7515818Abstract: This invention provides an image capturing apparatus which sets the spectral characteristics of a split light beam to be substantially equal to those of straight traveling light upon splitting a light beam coming from a photographing optical system and enables an autofocus detection function by the split light with a sufficient light amount. A digital camera includes a photographing optical system, beam splitter, focus detection sensor, polarizing filter, and CMOS sensor. The beam splitter splits a light beam which travels toward the CMOS sensor that receives an object image formed by the photographing optical system, depending on the direction of polarization, and the focus detection sensor performs focus detection based on the light beam split by the beam splitter. The polarizing filter removes substantially the same polarized light component as a polarized light component that travels toward the focus detection sensor as a result of splitting by the beam splitter.Type: GrantFiled: October 27, 2005Date of Patent: April 7, 2009Assignee: Canon Kabushiki KaishaInventor: Masafumi Kimura
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Patent number: 7515819Abstract: The invention provides a solid-state image pickup device for an auto-focus and a camera for an auto-focus in which focusing precision is improved. The device has first and second linear sensor pairs (for example, 2-1, 2-2) each having a linear sensor for a base portion with a plurality of pixels and a linear sensor for a reference portion with a plurality of pixels in order to perform a focal point detection of a TTL passive-type phase detection system. The first and second linear sensor pairs have the same pixel pitch, the first and second linear sensor pairs are neighboring in parallel and are arranged so as to be relatively deviated in the arranging direction of the linear sensors, and a signal output to detect the focal point is executed by using both of the first and second linear sensor pairs.Type: GrantFiled: April 7, 2005Date of Patent: April 7, 2009Assignee: Canon Kabushiki KaishaInventor: Hidekazu Takahashi
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Patent number: 7499639Abstract: There is disclosed an electronic imaging device having an imaging element, a mechanism which removes dust attached to the imaging element or an optical element disposed in front of the imaging element, and a display section which displays that at least the mechanism is operating. Consequently, an operator of the electronic imaging device can exactly recognize whether or not the mechanism to remove the dust is operating. Examples of the mechanism which removes the dust include an excitation mechanism which vibrates a dustproof filter disposed in front of the imaging element, a mechanism which removes the dust by a gas flow and the like.Type: GrantFiled: August 29, 2005Date of Patent: March 3, 2009Assignee: Olympus CorporationInventor: Sumio Kawai
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Patent number: 7466911Abstract: An image taking lens forming an optical image on an solid-state image pickup element according to the present invention, is provided with, in order from an object side thereof: a first lens with a positive power; a second lens with a negative power; and a third lens with a negative power. Third lens includes an image side surface in an aspheric shape such that a region around an optical axis in the aspheric shape is formed in a concave shape facing an image side of the image taking lens and a peripheral region in the aspheric shape surrounding the region around the optical axis is formed in a convex shape facing the image side of the image taking lens. The image taking lens fulfills a predefined conditional formula.Type: GrantFiled: June 8, 2006Date of Patent: December 16, 2008Assignee: Konica Minolta Opto, Inc.Inventor: Masashi Isono
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Publication number: 20080285966Abstract: An optical system of a focus detection apparatus includes a condenser lens positioned behind an expected focal plane of a photographing lens; an auxiliary lens group positioned behind the condenser lens to be coaxial therewith; and a pair of separator lenses positioned behind the auxiliary lens group in close vicinity thereof and integrally molded from resin. An object image formed on the expected focal plane is divided into two images by the pair of separator lenses to be reformed on a pair of areas on a sensor, respectively, and the auxiliary lens group includes a negative lens element made of resin, and a positive lens element made of glass.Type: ApplicationFiled: May 7, 2008Publication date: November 20, 2008Applicant: HOYA CORPORATIONInventor: Moriyasu KANAI
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Publication number: 20080267603Abstract: Provided is an auto-focusing camera module having a liquid lens. The auto-focusing camera module includes a lens barrel having a liquid lens and a solid lens stacked and disposed therewith; an image sensor for focusing light that is passed through the liquid lens and the solid lens; a substrate provided in a lower end of the lens barrel to electrically mount the image sensor; and a power supply unit fixed integrally in the lens barrel and electrically coupled between the liquid lens and the substrate to apply a power source to the liquid lens. Therefore, the auto-focusing camera module may be useful to control its focus to coincide with high pixels and high performances of the camera module, manufacture a small final product by lowering the entire height of the camera module, enhancing the productivity of the camera module by employing a simple liquid lens to simplify an assembly structure of the liquid lens that is in contact with the substrate, and reduce the manufacturing cost.Type: ApplicationFiled: April 25, 2008Publication date: October 30, 2008Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Moon Sik Jung, Tae Young Kim