Patents by Inventor Isamu Hirai

Isamu Hirai 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).

  • Patent number: 10770486
    Abstract: A method of producing a liquid crystal cell includes: a thin-film forming step of forming, on a surface of one electrode-attached substrates including a TFT substrate and a slot substrate, the TFT substrate including a first dielectric substrate, TFTs, and patch electrodes electrically connected to the TFTs, the slot substrate including a second dielectric substrate and a slot electrode supported on the second dielectric substrate and having slots, a thin film so as to cover the patch electrodes and/or the slot electrode; and a light irradiating step of irradiating the thin film with light including p-polarized light to provide the thin film with alignment-regulating capability of aligning liquid crystal molecules to thereby obtain an alignment film. The thin film includes a polymer including a photoreactive functional group and exhibiting the alignment-regulating capability of the thin film in a direction orthogonal to a polarization axis of the p-polarized light.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: September 8, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takashi Katayama, Isamu Miyake, Akira Hirai, Kei Shinada
  • Publication number: 20200043957
    Abstract: A method of producing a liquid crystal cell includes: a thin-film forming step of forming, on a surface of electrode-attached substrates including a TFT substrate and a slot substrate, the TFT substrate including a first dielectric substrate, TFTs, and patch electrodes electrically connected to the TFTs, the slot substrate including a second dielectric substrate and a slot electrode supported on the second dielectric substrate and having slots, a thin film so as to cover the patch electrodes and/or the slot electrode; and a light irradiating step of irradiating the thin film with light including p-polarized light to provide the thin film with alignment-regulating capability of aligning liquid crystal molecules to thereby obtain an alignment film. The thin film includes a polymer including a photoreactive functional group and exhibiting the alignment-regulating capability of the thin film in a direction orthogonal to a polarization axis of the p-polarized light.
    Type: Application
    Filed: October 2, 2017
    Publication date: February 6, 2020
    Inventors: Takashi KATAYAMA, Isamu MIYAKE, Akira HIRAI, Kei SHINADA
  • Patent number: 9179049
    Abstract: An optical device for forming an image of an object, comprising: a semitransparent mirror surface disposed on an optical path of the image of the object; and a light projection unit configured to project light to the semitransparent mirror surface and thereby to combine, on the optical path, the projected light transmitting through the semitransparent mirror surface with the image of the object reflecting from the semitransparent mirror surface, wherein: a first wavelength region is defined in a visible light region to include a wavelength of the projected light; the semitransparent mirror surface has a substantially flat reflectance property within a second wavelength region which is defined in the visible light region not to include the first wavelength region; and transmissivity of the semitransparent mirror surface at the wavelength of the projected light is higher by 10% to 50% than transmissivity in the second wavelength region.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: November 3, 2015
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Naohito Sasaki, Isamu Hirai
  • Publication number: 20140168499
    Abstract: An optical device for forming an image of an object, comprising: a semitransparent mirror surface disposed on an optical path of the image of the object; and a light projection unit configured to project light to the semitransparent mirror surface and thereby to combine, on the optical path, the projected light transmitting through the semitransparent mirror surface with the image of the object reflecting from the semitransparent mirror surface, wherein: a first wavelength region is defined in a visible light region to include a wavelength of the projected light; the semitransparent mirror surface has a substantially flat reflectance property within a second wavelength region which is defined in the visible light region not to include the first wavelength region; and transmissivity of the semitransparent mirror surface at the wavelength of the projected light is higher by 10% to 50% than transmissivity in the second wavelength region.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 19, 2014
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Naohito Sasaki, Isamu Hirai
  • Patent number: 8072508
    Abstract: A photographing apparatus comprises an imaging sensor, a controller, and an exposure-mode-selecting device. The controller performs a photometric operation on a photographing subject and obtains a luminance value of the photographing subject based on the photometric operation. The exposure-mode-selecting device is used for selecting an exposure mode of the photographing apparatus that has a shutter speed and aperture priority AE mode. The photographing operation is performed with a shutter speed and an aperture value that are set by a user and a sensitivity of the imaging sensor that is calculated based on the luminance value and the shutter speed and the aperture value, while the photographing apparatus is in the shutter speed and aperture priority AE mode.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: December 6, 2011
    Assignee: Hoya Corporation
    Inventors: Isamu Hirai, Tadahisa Ohkura
  • Patent number: 7990432
    Abstract: A photographing apparatus comprises an imaging sensor, a controller, and an exposure-mode-selecting device. The controller performs a photometric operation on a photographing subject and obtains a luminance value of the photographing subject based on the photometric operation. The exposure-mode-selecting device is used for selecting an exposure mode of the photographing apparatus that has a shutter speed and aperture priority AE mode. The photographing operation is performed with a shutter speed and an aperture value that are set by a user and a sensitivity of the imaging sensor that is calculated based on the luminance value and the shutter speed and the aperture value, while the photographing apparatus is in the shutter speed and aperture priority AE mode.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: August 2, 2011
    Assignee: Hoya Corporation
    Inventors: Isamu Hirai, Tadahisa Ohkura
  • Patent number: 7961245
    Abstract: An image surface illuminance varying apparatus includes a variable power optical system in which the optical power thereof can be varied by changing a relative position of a plurality of optical elements thereof; and a light-quantity ratio varying optical element whose transmittance varies in a direction perpendicular to an optical axis of the variable power optical system, the light-quantity ratio varying optical element being located in a light path of the variable power optical system to reduce an illuminance difference of an imaging surface. A distance from the light-quantity ratio varying optical element, which is moved along the optical axis, to a diaphragm or a shutter is varied in accordance with the power varying operation.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: June 14, 2011
    Assignee: Hoya Corporation
    Inventor: Isamu Hirai
  • Patent number: 7961250
    Abstract: A photographing apparatus comprises an imaging sensor, a controller, and an exposure-mode-selecting device. The controller performs a photometric operation on a photographing subject and obtains a luminance value of the photographing subject based on the photometric operation. The exposure-mode-selecting device is used for selecting an exposure mode of the photographing apparatus that has a sensitivity priority AE mode. The photographing operation is performed with a sensitivity of the imaging sensor that is set by a user and a shutter speed and an aperture value that are calculated based on the luminance value and the sensitivity, while the photographing apparatus is in the sensitivity priority AE mode.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: June 14, 2011
    Assignee: Hoya Corporation
    Inventors: Isamu Hirai, Tadahisa Ohkura, Toshihiro Hamamura
  • Publication number: 20100117182
    Abstract: An image pickup device includes a plurality of photoelectric transducers. The plurality of photoelectric transducers includes color filters provided thereon. A diffusion-reflection layer is provided in front of the plurality of photoelectric transducers, includes a microstructure which is finer than each light receiving element of the image pickup device and is provided on surfaces of the color filters so as to diffuse and reflect a part of incident light. A part of incident light on the diffusion-reflection layer is reflected and dispersed therefrom, and a remainder of the incident light is transmitted through the diffusion-reflection layer so as to be incident on the plurality of photoelectric transducers.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 13, 2010
    Applicant: HOYA CORPORATION
    Inventor: Isamu HIRAI
  • Patent number: 7692708
    Abstract: A photometric apparatus having at least two photo-receivers, includes a single incidence optical system, wherein a light bundle carrying an object image which is passed through a focusing screen and exits out of an image-erecting system is incident on the single incidence optical system; a beam splitting optical system which splits the incident light bundle, that is incident on the single incidence optical system, into at least two light bundles by making a part of the incident light bundle pass through the beam splitting optical system and making another part of the incident light reflect from the beam splitting optical system; and at least one photometering optical system which makes the two parts of the light incident on the two photo-receivers, respectively.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: April 6, 2010
    Assignee: Hoya Corporation
    Inventor: Isamu Hirai
  • Patent number: 7683410
    Abstract: An image pickup device includes a plurality of photoelectric transducers; and a diffusion-reflection layer provided in front of the plurality of photoelectric transducers, wherein a part of light incident on the diffusion-reflection layer is reflected and dispersed therefrom, and the remainder of the incident light is transmitted through the diffusion-reflection layer so as to be incident on the plurality of photoelectric transducers.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: March 23, 2010
    Assignee: HOYA Corporation
    Inventor: Isamu Hirai
  • Publication number: 20090309993
    Abstract: An image surface illuminance varying apparatus includes a variable power optical system in which the optical power thereof can be varied by changing a relative position of a plurality of optical elements thereof; and a light-quantity ratio varying optical element whose transmittance varies in a direction perpendicular to an optical axis of the variable power optical system, the light-quantity ratio varying optical element being located in a light path of the variable power optical system to reduce an illuminance difference of an imaging surface. A distance from the light-quantity ratio varying optical element, which is moved along the optical axis, to a diaphragm or a shutter is varied in accordance with the power varying operation.
    Type: Application
    Filed: August 24, 2009
    Publication date: December 17, 2009
    Applicant: PENTAX CORPORATION
    Inventor: Isamu Hirai
  • Publication number: 20080062276
    Abstract: A photographing apparatus comprises an imaging sensor, a controller, and an exposure-mode-selecting device. The controller performs a photometric operation on a photographing subject and obtains a luminance value of the photographing subject based on the photometric operation. The exposure-mode-selecting device is used for selecting an exposure mode of the photographing apparatus that has a sensitivity priority AE mode. The photographing operation is performed with a sensitivity of the imaging sensor that is set by a user and a shutter speed and an aperture value that are calculated based on the luminance value and the sensitivity, while the photographing apparatus is in the sensitivity priority AE mode.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 13, 2008
    Applicant: PENTAX CORPORATION
    Inventors: Isamu HIRAI, Tadahisa OHKURA, Toshihiro HAMAMURA
  • Publication number: 20080062277
    Abstract: A photographing apparatus comprises an imaging sensor, a controller, and an exposure-mode-selecting device. The controller performs a photometric operation on a photographing subject and obtains a luminance value of the photographing subject based on the photometric operation. The exposure-mode-selecting device is used for selecting an exposure mode of the photographing apparatus that has a shutter speed and aperture priority AE mode. The photographing operation is performed with a shutter speed and an aperture value that are set by a user and a sensitivity of the imaging sensor that is calculated based on the luminance value and the shutter speed and the aperture value, while the photographing apparatus is in the shutter speed and aperture priority AE mode.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 13, 2008
    Applicant: PENTAX CORPORATION
    Inventors: Isamu HIRAI, Tadahisa OHKURA
  • Publication number: 20060278904
    Abstract: An image pickup device includes a plurality of photoelectric transducers; and a diffusion-reflection layer provided in front of the plurality of photoelectric transducers, wherein a part of light incident on the diffusion-reflection layer is reflected and dispersed therefrom, and the remainder of the incident light is transmitted through the diffusion-reflection layer so as to be incident on the plurality of photoelectric transducers.
    Type: Application
    Filed: June 5, 2006
    Publication date: December 14, 2006
    Applicant: PENTAX CORPORATION
    Inventor: Isamu HIRAI
  • Publication number: 20060158546
    Abstract: An image surface illuminance varying apparatus includes a variable power optical system in which the optical power thereof can be varied by changing a relative position of a plurality of optical elements thereof; and a light-quantity ratio varying optical element whose transmittance varies in a direction perpendicular to an optical axis of the variable power optical system, the light-quantity ratio varying optical element being located in a light path of the variable power optical system to reduce an illuminance difference of an imaging surface. A distance from the light-quantity ratio varying optical element, which is moved along the optical axis, to a diaphragm or a shutter is varied in accordance with the power varying operation.
    Type: Application
    Filed: January 18, 2006
    Publication date: July 20, 2006
    Applicant: PENTAX Corporation
    Inventor: Isamu Hirai
  • Publication number: 20060158530
    Abstract: A photometric apparatus having at least two photo-receivers, includes a single incidence optical system, wherein a light bundle carrying an object image which is passed through a focusing screen and exits out of an image-erecting system is incident on the single incidence optical system; a beam splitting optical system which splits the incident light bundle, that is incident on the single incidence optical system, into at least two light bundles by making a part of the incident light bundle pass through the beam splitting optical system and making another part of the incident light reflect from the beam splitting optical system; and at least one photometering optical system which makes the two parts of the light incident on the two photo-receivers, respectively.
    Type: Application
    Filed: January 13, 2006
    Publication date: July 20, 2006
    Applicant: PENTAX Corporation
    Inventor: Isamu Hirai
  • Publication number: 20060153557
    Abstract: A viewfinder includes a focusing screen, an optical system having a ridge which is formed by cementing a pair of reflecting surfaces to each other; and an eyepiece, wherein an object image which is formed on the focusing screen is viewed through the eyepiece via the optical system. The ridge is provided at a position in which a line projecting the ridge on the focusing screen is shifted from a central position of the focusing screen so that a light ray which travels on an optical axis passing through a center of the focusing screen is incident on one of pair of reflecting surfaces and is not incident on the ridge.
    Type: Application
    Filed: January 11, 2006
    Publication date: July 13, 2006
    Applicant: PENTAX Corporation
    Inventor: Isamu Hirai
  • Patent number: 6718134
    Abstract: An AF auxiliary light projector for an AF camera includes a focus detection optical system having a first optical axis, and an AF auxiliary light projecting optical system having a second optical axis which intersects the first optical axis, the AF auxiliary light projecting optical system projecting an image having a predetermined contrast pattern onto an object. The AF auxiliary light projecting optical system includes a projector lens, a contrast pattern chart, an illumination lens, and an illumination light source, in that order. The illumination lens has an asymmetrical optical power so that an optical power of a far distance portion of the illumination lens for a far distance region of the contrast pattern chart is greater than an optical power of a near distance portion of the illumination lens for a near distance region of the contrast pattern chart.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: April 6, 2004
    Assignee: PENTAX Corporation
    Inventors: Masayuki Murata, Isamu Hirai
  • Patent number: 6707997
    Abstract: There is provided a flash control system for a camera, which is provided with an automatic flash device which uses a predetermined appropriate amount of light to control emission of flash light, a control system that preliminarily emits the flash light, a first photometric sensors for colorimetry, a color determining system that determines the color of the object. Further, the flash control system is provided with a first colorimetric compensation value determining system which determines a first colormetric compensation value based on the determined color, and a flash control level adjusting system that adjusts the predetermined appropriate amount of light based on the first colorimetric compensation value.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: March 16, 2004
    Assignee: Pentax Corporation
    Inventors: Isamu Hirai, Yoshikazu Iida