Patents by Inventor Mika Hamaoka

Mika Hamaoka 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).

  • Publication number: 20210080713
    Abstract: The optical scanning device includes a swingable reflector; a blocking unit that is provided in the reflector to move in linkage with the reflector; and a sensor unit that includes at least a first sensor unit and a second sensor unit, wherein each of the first and second sensor units includes an output unit, which is a light generator or an electromagnetic wave generator configured to output a detection target and a detection unit, which is a light receiver or an electromagnetic wave receiver configured to detect the detection target. The output unit is at a position that faces the detection unit. When the reflector is in a predetermined swing angle range, the blocking plate blocks a path of the detection target between the output unit and the detection unit.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 18, 2021
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: YUICHIRO MASUDA, TAKESHI INODA, MIKA HAMAOKA
  • Patent number: 10884239
    Abstract: Provided is an optical scanning device. The optical scanning device includes a swingable reflection unit; a blocking unit that is provided in the reflection unit to move in linkage with the reflection unit; and a sensor unit that includes an output unit configured to output a detection target and a detection unit configured to detect the detection target, wherein, when the reflection unit is in a predetermined swing angle range, the blocking unit blocks a path of the detection target between the output unit and the detection unit.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: January 5, 2021
    Assignee: FUNAI ELECTRIC CO., LTD.
    Inventors: Yuichiro Masuda, Takeshi Inoda, Mika Hamaoka
  • Publication number: 20180364475
    Abstract: Provided is an optical scanning device. The optical scanning device includes a swingable reflection unit; a blocking unit that is provided in the reflection unit to move in linkage with the reflection unit; and a sensor unit that includes an output unit configured to output a detection target and a detection unit configured to detect the detection target, wherein, when the reflection unit is in a predetermined swing angle range, the blocking unit blocks a path of the detection target between the output unit and the detection unit.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 20, 2018
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: YUICHIRO MASUDA, TAKESHI INODA, MIKA HAMAOKA
  • Publication number: 20150043320
    Abstract: An optical pickup is configured such that light split by a light-splitting element is received by light-receiving elements provided on a light-receiving surface of a light-receiving unit, has on the light-receiving surface of the light-receiving unit quartered light-receiving portions that detect position-adjustment light and configured by equal quartering so as to be arranged in two dimensions, and in which the position of the light-splitting element is adjusted based on the position-adjustment light received by each of the quartered light-receiving portions.
    Type: Application
    Filed: July 25, 2014
    Publication date: February 12, 2015
    Inventors: Mitsuyoshi SASABE, Mio KOGA, Mika HAMAOKA
  • Publication number: 20140286151
    Abstract: An optical pickup includes a plurality of light sources, an objective lens, a diffractive optical element, and a light-detecting unit. The various light sources emit light of wavelengths that are different from each other. The objective lens focuses light on an optical disc. The diffractive optical element includes a diffracting portion and a light-blocking portion. The diffracting portion diffracts return light reflected from a first recording layer of the optical disc where information is being read or written. The light-blocking portion blocks stray light reflected from a second recording layer of the optical disc that is different from the first recording layer. The light-detecting unit receives the diffracted light of the diffractive optical element and generates an output signal to generate a tracking error signal based on this diffracted light. Furthermore, the light-blocking portion includes a plurality of light-blocking patterns which block light of wavelengths that are different from each other.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 25, 2014
    Applicant: Funai Electric Co., Ltd.
    Inventors: Mika HAMAOKA, Mio KOGA, Mitsuyoshi SASABE
  • Patent number: 7898926
    Abstract: The liquid crystal element includes a pair of transparent substrates, a liquid crystal arranged between the substrates, a diffraction pattern including concentric diffraction electrodes formed on one substrate, and a phase shift pattern including concentric phase shift electrodes formed on the other substrate. The diffraction pattern includes a first region being of a constant range in a radial direction from a center and having a wide electrode interval, a second region being arranged on the outer side of the first region and having a narrow electrode interval, and a third region being arranged on the outer side of the second region and including a single diffraction electrode. An additional electrode facing the phase shift electrode is arranged in a gap between the diffraction electrodes in the first region.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: March 1, 2011
    Assignee: Funai Electric Co., Ltd.
    Inventors: Mitsuyoshi Sasabe, Mika Hamaoka
  • Patent number: 7792004
    Abstract: An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a photo detector which receives reflected light that is reflected by the optical recording medium. Further on an optical path between the light source and the objective lens, a liquid lens which performs correction of spherical aberration by changing state of convergence or divergence of the input light beam and a liquid crystal element on which a plurality of phase shift regions are formed to adjust phase of the input light beam, and which performs correction of the spherical aberration by phase adjustment of the phase shift regions are arranged.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: September 7, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventors: Mika Hamaoka, Tetsuya Shihara
  • Publication number: 20080291808
    Abstract: An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a photo detector which receives reflected light that is reflected by the optical recording medium. Further on an optical path between the light source and the objective lens, a liquid lens which performs correction of spherical aberration by changing state of convergence or divergence of the input light beam and a liquid crystal element on which a plurality of phase shift regions are formed to adjust phase of the input light beam, and which performs correction of the spherical aberration by phase adjustment of the phase shift regions are arranged.
    Type: Application
    Filed: May 20, 2008
    Publication date: November 27, 2008
    Inventors: Mika Hamaoka, Tetsuya Shihara
  • Publication number: 20080181084
    Abstract: The liquid crystal element includes a pair of transparent substrates, a liquid crystal arranged between the substrates, a diffraction pattern including concentric diffraction electrodes formed on one substrate, and a phase shift pattern including concentric phase shift electrodes formed on the other substrate. The diffraction pattern includes a first region being of a constant range in a radial direction from a center and having a wide electrode interval, a second region being arranged on the outer side of the first region and having a narrow electrode interval, and a third region being arranged on the outer side of the second region and including a single diffraction electrode. An additional electrode facing the phase shift electrode is arranged in a gap between the diffraction electrodes in the first region.
    Type: Application
    Filed: January 24, 2008
    Publication date: July 31, 2008
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: Mitsuyoshi Sasabe, Mika Hamaoka
  • Publication number: 20080151736
    Abstract: The present invention aims to correct the spherical aberration and ensure the working distance and furthermore to obtain satisfactory recording and reproducing property by shaping the optical spot formed on the disc surface. A liquid crystal element for correcting spherical aberration includes diffraction electrodes for converting the light beam to a divergent light when reproducing a CD, and phase shift electrodes for providing a phase difference to the light beam when reproducing a BD. When reproducing a BD, voltage is applied to the diffraction electrodes as well as the phase shift electrodes to diverge the light beam and lower the light intensity of the central portion, thereby shaping the optical spot formed on the disc.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 26, 2008
    Applicant: Funai Electric Co., Ltd.
    Inventors: Mika Hamaoka, Ken Nishioka, Mitsuyoshi Sasabe
  • Publication number: 20080130468
    Abstract: An optical pickup device includes a beam shaping mirror. The mirror has a first optical surface on which a wavelength selection film is formed and a second optical surface on which a diffraction grating is formed. The wavelength selection film transmits a first laser beam and reflects a second laser beam. Light intensity distribution of the first laser beam is converted from an elliptic shape to a circular shape by reflecting the first laser beam transmitted by the wavelength selection film and input to the beam shaping mirror by the diffraction grating, then transmitting it by the wavelength selection film and outputting it from the beam shaping mirror. The diffraction grating diffracts the first laser beam in order that directions of the first and second laser beams which are output from the beam shaping mirror become the same.
    Type: Application
    Filed: November 28, 2007
    Publication date: June 5, 2008
    Inventors: Ken Nishioka, Mitsuyoshi Sasabe, Mika Hamaoka
  • Publication number: 20080130469
    Abstract: An optical pickup device in which light via a beam shaping mirror is input to an objective lens and the light is directed to an optical disc, includes a collimator lens which changes the light input to the beam shaping mirror into infinite system light and the beam shaping mirror includes a diffraction grating which changes the infinite system light into finite system light.
    Type: Application
    Filed: November 20, 2007
    Publication date: June 5, 2008
    Inventors: Mitsuyoshi Sasabe, Ken Nishioka, Mika Hamaoka
  • Publication number: 20080130466
    Abstract: An optical pickup device includes a beam shaping mirror. The mirror has a first optical surface on which a wavelength selection film and a diffraction grating are formed, and a second optical surface that is composed of a reflecting surface. The wavelength selection film passes a first laser beam and reflects a second laser beam. A light intensity distribution of the first laser beam is converted from an elliptic shape to a circular shape by operation in which the first laser beam which passes the wavelength selection film and is input to the beam shaping mirror, is reflected on the second optical surface, passes the wavelength selection film and is output from the mirror. The second laser beam is diverged by the diffraction grating. Directions of the first and second laser beams which are output from the mirror are made the same by diffraction of the second laser beam.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 5, 2008
    Inventors: Ken Nishioka, Mitsuyoshi Sasabe, Mika Hamaoka
  • Publication number: 20080117628
    Abstract: An optical pickup device for reducing comma aberration, spherical aberration, and astigmatism while entering a beam light having an ideal intensity distribution to the objective lens is provided. In an optical pickup device for emitting beam lights having different wavelengths from light sources, transmitting the beam lights through a common collimator lens and an objective lens and irradiating the beam lights onto an optical disc, one of the beam lights is converted to an infinite light and exit from the collimator lens, and the other beam light is converted to a finite light and exit from the collimator.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 22, 2008
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: Mika Hamaoka, Ken Nishioka, Mitsuyoshi Sasabe
  • Publication number: 20080049580
    Abstract: An optical pickup device includes a plurality of light sources for emitting light beams having different wavelengths; an objective lens for focusing the light beams emitted from the light sources on a recording surface of an optical recording medium; and a photo detector for receiving the light beams reflected from the recording surface.
    Type: Application
    Filed: August 22, 2007
    Publication date: February 28, 2008
    Inventors: Mika Hamaoka, Hitoshi Fujii, Kenji Nagashima