Patents by Inventor Masao Shikaumi
Masao Shikaumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10588508Abstract: An ophthalmic apparatus includes a control unit configured to control a scanning unit so that scanning lines of a first field and scanning lines of a second field are alternately arranged in a direction crossing the scanning lines, and a detection unit configured to, in a case where one of first front images of the first field is selected as a reference image, detect movement of the subject's eye using information indicating a position gap between the reference image and the first front images, and detect the movement of the subject's eye using information indicating a position gap between the reference image and second front images of the second field and information indicating a difference in position between the first field and the second field.Type: GrantFiled: December 6, 2017Date of Patent: March 17, 2020Assignee: Canon Kabushiki KaishaInventors: Pawel Strózyk, Slawomir Orlowski, Pawel Dalasiński, Maciej Pańkowiec, Krzysztof Piotrowski, Masao Shikaumi, Yukio Sakagawa
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Publication number: 20180153401Abstract: An ophthalmic apparatus includes a control unit configured to control a scanning unit so that scanning lines of a first field and scanning lines of a second field are alternately arranged in a direction crossing the scanning lines, and a detection unit configured to, in a case where one of first front images of the first field is selected as a reference image, detect movement of the subject's eye using information indicating a position gap between the reference image and the first front images, and detect the movement of the subject's eye using information indicating a position gap between the reference image and second front images of the second field and information indicating a difference in position between the first field and the second field.Type: ApplicationFiled: December 6, 2017Publication date: June 7, 2018Inventors: Pawel Strózyk, Slawomir Orlowski, Pawel Dalasinski, Maciej Pankowiec, Krzysztof Piotrowski, Masao Shikaumi, Yukio Sakagawa
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Patent number: 9282889Abstract: A camera, which is removably mountable on an ophthalmologic photographing apparatus including an illumination optical system configured to illuminate a subject's eye with illumination light, includes an imaging unit configured to form an image from return light from the subject's eye through a photographing optical system in the ophthalmologic photographing apparatus, a development unit configured to develop a moving image or a still image of the subject's eye based on an output signal from the imaging unit with using a development parameter based on a wavelength range of the illumination light, and a display unit configured to display the moving image or the still image developed by the development unit.Type: GrantFiled: August 24, 2010Date of Patent: March 15, 2016Assignee: Canon Kabushiki KaishaInventors: Masao Shikaumi, Motoya Takai, Yasuhiro Nakahara, Hiroki Uchida
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Patent number: 9022568Abstract: There is provided an inexpensive ophthalmologic imaging apparatus having favorable operability in anterior ocular segment imaging and fundus imaging. In an ophthalmologic imaging apparatus which includes a focus lens located in an optical system, a focus lens drive unit configured to drive the focus lens, and a focusing operation unit configured to designate the drive amount of the focus lens, and has a fundus imaging mode of imaging a fundus and an anterior ocular segment imaging mode of imaging an anterior ocular segment, the drive amount of the focus lens by the focus lens drive unit is changed in accordance with a selected imaging mode and a focusing operation amount in the focusing operation unit.Type: GrantFiled: April 7, 2014Date of Patent: May 5, 2015Assignee: Canon Kabushiki KaishaInventor: Masao Shikaumi
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Publication number: 20140313478Abstract: There is provided an inexpensive ophthalmologic imaging apparatus having favorable operability in anterior ocular segment imaging and fundus imaging. In an ophthalmologic imaging apparatus which includes a focus lens located in an optical system, a focus lens drive unit configured to drive the focus lens, and a focusing operation unit configured to designate the drive amount of the focus lens, and has a fundus imaging mode of imaging a fundus and an anterior ocular segment imaging mode of imaging an anterior ocular segment, the drive amount of the focus lens by the focus lens drive unit is changed in accordance with a selected imaging mode and a focusing operation amount in the focusing operation unit.Type: ApplicationFiled: April 7, 2014Publication date: October 23, 2014Applicant: CANON KABUSHIKI KAISHAInventor: Masao Shikaumi
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Patent number: 8752962Abstract: When the fundus camera is positioned on the same side as the subject's eye relative to an appropriate position (front-focus state), the positioning index light source turned on in blue produces most-focused positioning index images. The positioning index light sources become more blurred in order of green and red. When the camera is positioned on the opposite side of the subject's eye relative to the appropriate position (rear-focus state), the positioning index light source turned on in red produces most-focused images. The positioning index light sources become more blurred in order of green and blue. Based on a degree of the blur of the individual positioning index images in red, green, and blue reflected by the cornea of the subject's eye, the calculation unit calculates whether to move the camera body closer to or farther away from the subject's eye and allows the display unit to display the information.Type: GrantFiled: July 6, 2010Date of Patent: June 17, 2014Assignee: Canon Kabushiki KaishaInventors: Shigeaki Ono, Masao Shikaumi, Kyoji Sekiguchi, Koji Uchida
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Patent number: 8449113Abstract: An imaging unit detachable from an optical unit of an ophthalmologic imaging apparatus having a light source, an illumination optical system that directs light from the light source to a subject's fundus, and an imaging optical system that directs reflected light from the subject's fundus to an image sensing surface of an imaging device includes an imaging device that images a fundus image formed on an image sensing surface with the reflected light, and a display unit configured to display an image. The imaging unit has a live view function to perform continuous display on the display unit, of fundus images imaged by the imaging device, and switches a display of an image on the display unit by the live view function between a normal display and a display in which the normal display is vertically and horizontally inverted, in accordance with information regarding the imaging optical system.Type: GrantFiled: August 12, 2011Date of Patent: May 28, 2013Assignee: Canon Kabushiki KaishaInventor: Masao Shikaumi
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Patent number: 8395697Abstract: An imaging apparatus includes a control unit configured to control a focus position of a lens by causing a communication unit to acquire a plurality of lens position information stored in a first storage unit without any synchronization with acquisition of an evaluation value by a contrast detection unit and associating the acquired plurality of lens position information with evaluation values stored in a second storage unit.Type: GrantFiled: November 24, 2008Date of Patent: March 12, 2013Assignee: Canon Kabushiki KaishaInventor: Masao Shikaumi
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Patent number: 8393736Abstract: A method of producing an ophthalmic imaging apparatus includes the steps of producing an imaging unit configured to capture an image of an image subject in visible light and infrared light; adjusting the color tone of the imaging unit using a color-tone adjustment unit having a first optical member configured to absorb infrared light; and connecting the adjusted imaging unit and an optical system having a second optical member whose characteristic is the same as a characteristic of the first optical member and configured to capture an optical image of an eye to be examined.Type: GrantFiled: September 28, 2010Date of Patent: March 12, 2013Assignee: Canon Kabushiki KaishaInventors: Masao Shikaumi, Yasuhiro Nakahara
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Publication number: 20120147327Abstract: A camera, which is removably mountable on an ophthalmologic photographing apparatus including an illumination optical system configured to illuminate a subject's eye with illumination light, includes an imaging unit configured to form an image from return light from the subject's eye through a photographing optical system in the ophthalmologic photographing apparatus, a development unit configured to develop a moving image or a still image of the subject's eye based on an output signal from the imaging unit with using a development parameter based on a wavelength range of the illumination light, and a display unit configured to display the moving image or the still image developed by the development unit.Type: ApplicationFiled: August 24, 2010Publication date: June 14, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Masao Shikaumi, Motoya Takai, Yasuhiro Nakahara, Hiroki Uchida
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Publication number: 20120050673Abstract: An imaging unit detachable from an optical unit of an ophthalmologic imaging apparatus having a light source, an illumination optical system that directs light from the light source to a subject's fundus, and an imaging optical system that directs reflected light from the subject's fundus to an image sensing surface of an imaging device includes an imaging device that images a fundus image formed on an image sensing surface with the reflected light, and a display unit configured to display an image. The imaging unit has a live view function to perform continuous display on the display unit, of fundus images imaged by the imaging device, and switches a display of an image on the display unit by the live view function between a normal display and a display in which the normal display is vertically and horizontally inverted, in accordance with information regarding the imaging optical system.Type: ApplicationFiled: August 12, 2011Publication date: March 1, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Masao Shikaumi
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Publication number: 20120050515Abstract: A fundus camera, having a first light source for observing an object, a second light source for photographing the object and an image pickup element, determines a light intensity of the second light source based on first image data obtained by illuminating an eye to be examined through the first light source and by forming an image on the image pickup element using light reflected from the eye to be examined. A computer analyzes second image data obtained by illuminating the eye to be examined through the second light source with the light intensity determined by the fundus camera and by forming an image on the image pickup element using light reflected from the eye to be examined. The computer controls brightness correction processing of the second image data based on the analysis result and information relating to a time of photographing the second image data.Type: ApplicationFiled: August 12, 2011Publication date: March 1, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Masao Shikaumi, Hiroshi Hara
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Patent number: 8007104Abstract: A fundus camera includes an observation photographing unit having a focusing lens to perform focusing of an imaging unit on a fundus of a subject's eye, a lens driving unit configured to drive the focusing lens in an optical axis direction, and a focusing control unit configured to calculate a focusing evaluation value based on image information of a predetermined area of a fundus image captured by the observation photographing unit, and drive the focusing lens based on the focusing evaluation value, thereby performing focusing, wherein the focusing control unit moves the focusing lens from a previous photographing position of the focusing lens by a predetermined moving amount, and then performs the focusing.Type: GrantFiled: May 5, 2010Date of Patent: August 30, 2011Assignee: Canon Kabushiki KaishaInventors: Kyoji Sekiguchi, Shigeaki Ono, Masao Shikaumi, Motoya Takai, Toshifumi Masaki
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Publication number: 20110090457Abstract: A method of producing an ophthalmic imaging apparatus includes the steps of producing an imaging unit configured to capture an image of an image subject in visible light and infrared light; adjusting the color tone of the imaging unit using a color-tone adjustment unit having a first optical member configured to absorb infrared light; and connecting the adjusted imaging unit and an optical system having a second optical member whose characteristic is the same as a characteristic of the first optical member and configured to capture an optical image of an eye to be examined.Type: ApplicationFiled: September 28, 2010Publication date: April 21, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masao Shikaumi, Yasuhiro Nakahara
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Publication number: 20110007274Abstract: When the fundus camera is positioned on the same side as the subject's eye relative to an appropriate position (front-focus state), the positioning index light source turned on in blue produces most-focused positioning index images. The positioning index light sources become more blurred in order of green and red. When the camera is positioned on the opposite side of the subject's eye relative to the appropriate position (rear-focus state), the positioning index light source turned on in red produces most-focused images. The positioning index light sources become more blurred in order of green and blue. Based on a degree of the blur of the individual positioning index images in red, green, and blue reflected by the cornea of the subject's eye, the calculation unit calculates whether to move the camera body closer to or farther away from the subject's eye and allows the display unit to display the information.Type: ApplicationFiled: July 6, 2010Publication date: January 13, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shigeaki Ono, Masao Shikaumi, Kyoji Sekiguchi, Koji Uchida
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Publication number: 20100283970Abstract: A fundus camera includes an observation photographing unit having a focusing lens to perform focusing of an imaging unit on a fundus of a subject's eye, a lens driving unit configured to drive the focusing lens in an optical axis direction, and a focusing control unit configured to calculate a focusing evaluation value based on image information of a predetermined area of a fundus image captured by the observation photographing unit, and drive the focusing lens based on the focusing evaluation value, thereby performing focusing, wherein the focusing control unit moves the focusing lens from a previous photographing position of the focusing lens by a predetermined moving amount, and then performs the focusing.Type: ApplicationFiled: May 5, 2010Publication date: November 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Kyoji Sekiguchi, Shigeaki Ono, Masao Shikaumi, Motoya Takai, Toshifumi Masaki
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Publication number: 20090135293Abstract: An imaging apparatus includes a control unit configured to control a focus position of a lens by causing a communication unit to acquire a plurality of lens position information stored in a first storage unit without any synchronization with acquisition of an evaluation value by a contrast detection unit and associating the acquired plurality of lens position information with evaluation values stored in a second storage unit.Type: ApplicationFiled: November 24, 2008Publication date: May 28, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Masao Shikaumi
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Publication number: 20050140803Abstract: Photographed image data is segmented into a plurality of image areas, and whether a pink-eye effect occurs in each of the plurality of image areas is detected. The original photographed image data is stored together with image data of an image area in which the detected pink-eye effect is corrected and its correction information. If the result of pink-eye correction is unsatisfactory to the user, the image area of the original image can be designated to perform pink-eye correction again.Type: ApplicationFiled: December 21, 2004Publication date: June 30, 2005Inventors: Masanori Ohtsuka, Masao Shikaumi, Yusuke Mitarai
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Patent number: 6266488Abstract: A camera and a cartridge indicator setting apparatus adapted to a film cartridge including an indicator operatively coupled to a film supply spool provided in the film cartridge. The camera and the cartridge indicator setting apparatus includes a storage device which stores information to be indicated by the indicator of the film cartridge; and a setting device for driving, in response to an operation for ejecting the film cartridge which has been loaded on the camera, the film supply spool of the film cartridge which has been stopped after completion of rewinding of a film, and for setting the indicator of the film cartridge in accordance with the information stored by the storage device.Type: GrantFiled: June 28, 1996Date of Patent: July 24, 2001Assignee: Canon Kabushiki KaishaInventors: Masao Shikaumi, Yasuhiro Toyoda
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Patent number: 6233405Abstract: A camera and a cartridge indicator setting apparatus adapted to a film cartridge including an indicator operatively coupled to a film supply spool provided in the film cartridge. The camera and the cartridge indicator setting apparatus includes a storage device which stores information to be indicated by the indicator of the film cartridge; and a setting device for driving, in response to an operation for ejecting the film cartridge which has been loaded on the camera, the film supply spool of the film cartridge which has been stopped after completion of rewinding of a film, and for setting the indicator of the film cartridge in accordance with the information stored by the storage device.Type: GrantFiled: May 3, 1999Date of Patent: May 15, 2001Assignee: Canon Kabushiki KaishaInventors: Masao Shikaumi, Yasuhiro Toyoda