Patents by Inventor Yasuhiro Awatsuji
Yasuhiro Awatsuji 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: 10108145Abstract: A digital holography device of an embodiment of the present invention includes: an image sensing device which records, in an image sensor and on the basis of an object, a plurality of holograms that correspond to respective different photographic exposure values; and a computer which (i) generates a high dynamic range hologram, which includes pieces of information ranging from low luminance information to high luminance information, by synthesizing the plurality of holograms recorded and (ii) generates a reconstructed image of the object by performing arithmetic processing of phase-shift interferometry, diffraction calculation, and/or the like on the basis of the high dynamic range hologram.Type: GrantFiled: August 28, 2013Date of Patent: October 23, 2018Assignee: NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGYInventors: Yasuhiro Awatsuji, Ryosuke Yonesaka, Tatsuki Tahara
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Patent number: 10001405Abstract: A complex amplitude information measurement apparatus (10) according to the present invention includes pixel sensor groups for generating a difference from one pixel sensor group to another in the optical distance of object light traveling from a measurement object (100); a camera (15) provided with an image sensor for recording, with a single-shot exposure, the object light that has passed through or been reflected from the pixel sensor groups to obtain intensity information of the measurement object; and a computer (16) for computing, on the basis of the intensity information, phase information of the measurement object (100).Type: GrantFiled: March 20, 2014Date of Patent: June 19, 2018Assignee: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Peng Xia
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Publication number: 20160061656Abstract: A complex amplitude information measurement apparatus (10) according to the present invention includes pixel sensor groups for generating a difference from one pixel sensor group to another in the optical distance of object light traveling from a measurement object (100); a camera (15) provided with an image sensor for recording, with a single-shot exposure, the object light that has passed through or been reflected from the pixel sensor groups to obtain intensity information of the measurement object; and a computer (16) for computing, on the basis of the intensity information, phase information of the measurement object (100).Type: ApplicationFiled: March 20, 2014Publication date: March 3, 2016Inventors: Yasuhiro AWATSUJI, Peng XIA
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Patent number: 9201397Abstract: A digital holography device (1) which is capable of measuring a subject with high accuracy by correcting intensity unevenness by accurately removing zeroth-order diffracted light, includes: a hologram generating section (26) for generating a first hologram and a second hologram each obtained by extracting components identical in phase shift amount from a polarizer array hologram which is recorded in an image capturing device (7) mounted with a polarizer array (6); a dividing section (3) for dividing the first hologram into a plurality of first regions, and dividing the second hologram into a plurality of second regions; a comparing section (4) for comparing a first average value of an intensity in a first region of the first hologram and a second average value of an intensity in a second region of the second hologram which region corresponds to the first region; and a correcting section (5) for, in a case where the first average value and the second average value differ, correcting at least one of the first aType: GrantFiled: February 14, 2012Date of Patent: December 1, 2015Assignee: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Peng Xia, Tatsuki Tahara
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Publication number: 20150205260Abstract: A digital holography device of an embodiment of the present invention includes: an image sensing device which records, in an image sensor and on the basis of an object, a plurality of holograms that correspond to respective different photographic exposure values; and a computer which (i) generates a high dynamic range hologram, which includes pieces of information ranging from low luminance information to high luminance information, by synthesizing the plurality of holograms recorded and (ii) generates a reconstructed image of the object by performing arithmetic processing of phase-shift interferometry, diffraction calculation, and/or the like on the basis of the high dynamic range hologram.Type: ApplicationFiled: August 28, 2013Publication date: July 23, 2015Applicant: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Ryosuke Yonesaka, Tatsuki Tahara
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Patent number: 8786755Abstract: A polarization imaging apparatus includes a laser light source and an image pickup element. Object light and reference light each include a first polarized-light component polarized in a first direction and a second polarized-light component polarized in a second direction that is different from the first direction. The image pickup element simultaneously captures an image of an interference pattern including (i) a first interference figure, (ii) a second interference figure, (iii) a third interference figure, and (iv) a fourth interference figure. The polarization imaging apparatus includes a reconstructing section generating respective reconstructed images of the object in regard to the first and second polarized-light components, from the first to fourth interference figures, and a polarized-light-image-calculating section obtaining polarized-light images from the reconstructed images.Type: GrantFiled: June 22, 2011Date of Patent: July 22, 2014Assignee: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Tatsuki Tahara
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Patent number: 8665504Abstract: A digital holography device includes a light source that emits light, the light source being provided for supply of object light beams formed by radiation, transmission, scattering, reflection, or diffraction of the emitted light from a subject, an array device that splits the light emitted from the light source into two kinds of reference light beams having different phases in a plane perpendicular to a direction in which the light emitted from the light source travels, a CCD camera having an image-capturing plane on which two kinds of interference fringe patterns are recorded, the interference fringe patterns being formed by interferences between the two kinds of reference light beams, and the object light beams, and an image reconstruction device that generates a reconstructed image of the subject from the two kinds of interference fringe patterns recorded on the image-capturing plane.Type: GrantFiled: November 21, 2008Date of Patent: March 4, 2014Assignee: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Atsushi Kaneko, Takamasa Koyama, Tatsuki Tahara, Takeshi Wakamatsu
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Patent number: 8654343Abstract: An embodiment of the present invention realizes an interference measurement apparatus which can obtain an interference image to be used for obtaining three-dimensional information of a subject which dynamically changes.Type: GrantFiled: January 13, 2010Date of Patent: February 18, 2014Assignee: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Tatsuki Tahara
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Publication number: 20130301093Abstract: A digital holography device (1) which is capable of measuring a subject with high accuracy by correcting intensity unevenness by accurately removing zeroth-order diffracted light, includes: a hologram generating section (26) for generating a first hologram and a second hologram each obtained by extracting components identical in phase shift amount from a polarizer array hologram which is recorded in an image capturing device (7) mounted with a polarizer array (6); a dividing section (3) for dividing the first hologram into a plurality of first regions, and dividing the second hologram into a plurality of second regions; a comparing section (4) for comparing a first average value of an intensity in a first region of the first hologram and a second average value of an intensity in a second region of the second hologram which region corresponds to the first region; and a correcting section (5) for, in a case where the first average value and the second average value differ, correcting at least one of the first aType: ApplicationFiled: February 14, 2012Publication date: November 14, 2013Applicant: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Peng Xia, Tatsuki Tahara
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Publication number: 20130100333Abstract: A polarization imaging apparatus includes a laser light source and an image pickup element. Object light and reference light each include a first polarized-light component polarized in a first direction and a second polarized-light component polarized in a second direction that is different from the first direction. The image pickup element simultaneously captures an image of an interference pattern including (i) a first interference figure, (ii) a second interference figure, (iii) a third interference figure, and (iv) a fourth interference figure. The polarization imaging apparatus includes a reconstructing section generating respective reconstructed images of the object in regard to the first and second polarized-light components, from the first to fourth interference figures, and a polarized-light-image-calculating section obtaining polarized-light images from the reconstructed images.Type: ApplicationFiled: June 22, 2011Publication date: April 25, 2013Applicant: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Tatsuki Tahara
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Publication number: 20110292402Abstract: An embodiment of the present invention realizes an interference measurement apparatus which can obtain an interference image to be used for obtaining three-dimensional information of a subject which dynamically changes.Type: ApplicationFiled: January 13, 2010Publication date: December 1, 2011Applicant: National University Corporation Kyoto Institute of TechnologyInventors: Yasuhiro Awatsuji, Tatsuki Tahara
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Publication number: 20100253986Abstract: Provided is a digital holography device having a simple configuration and an improved image quality, including: a light source that emits light, the light source being provided for supply of object light beams formed by radiation, transmission, scattering, reflection, or diffraction of the emitted light from a subject; an array device that splits the light emitted from the light source into two kinds of reference light beams having different phases in a plane perpendicular to a direction in which the light emitted from the light source travels; a CCD camera having an image-capturing plane on which two kinds of interference fringe patterns are recorded, the interference fringe patterns being formed by interferences between the two kinds of reference light beams, which have been produced by the array device, and the object light beams, which have been formed by radiation, transmission, scattering, reflection, or diffraction from the subject; and an image reconstruction device that generates a reconstructed imagType: ApplicationFiled: November 21, 2008Publication date: October 7, 2010Inventors: Yasuhiro Awatsuji, Atsushi Kaneko, Takamasa Koyama, Tatsuki Tahara, Takeshi Wakamatsu