Patents by Inventor Takamasa Ando

Takamasa Ando 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: 20110102898
    Abstract: A diffractive lens 11 according to the present invention includes: a lens base 18, which has a second surface 13 with first and second groups of diffraction grating portions 20 and 21; and a protective coating 17, which is arranged on the first group of diffraction grating portions 20. The first group of diffraction grating portions 20 has a first group of diffraction steps and the second group of diffraction grating portions 21 has a second group of diffraction steps, which is lower in height than the first group of diffraction steps. One of the respective materials of the base 18 and the protective coating 17 has a higher refractive index and a greater Abbe number than the other material. And the second group of diffraction steps is not covered with the protective coating 17.
    Type: Application
    Filed: December 18, 2009
    Publication date: May 5, 2011
    Inventors: Tsuguhiro Korenaga, Takamasa Ando
  • Publication number: 20110096400
    Abstract: According to the present invention, a small-sized double-lens imaging optical system whose chromatic aberration is corrected even at a super wide angle of 150° or more can be provided. The double-lens imaging optical system of the present invention includes a concave lens, and a convex lens having a diffraction grating provided thereon, and satisfies the following conditional expression (1): 4.5<P1=(1?f/fa)·?d<9.0??(1). Herein, f is an effective focal length of the double-lens imaging optical system; fa is an effective focal length of the double-lens imaging optical system excluding the diffraction grating; and ?d is an Abbe number of the material of the convex lens with respect to the d-line. As a result, chromatic aberration can be well corrected even with respect to rays entering at high angles of view.
    Type: Application
    Filed: June 12, 2009
    Publication date: April 28, 2011
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 7932854
    Abstract: In an azimuth detecting apparatus, a receiver includes a plurality of first antenna elements and a second antenna element. The first antenna elements are arranged at first intervals d1 to form an array. The second antenna element is arranged to define a second interval d2 between itself and one of the first antenna elements which is located at an end of the array, where d2 is less than d1. A first azimuth detector detects, within a first azimuth detection area whose angular range is defined by d1, the azimuth of a target based on the signals generated by all the first antenna elements. A second azimuth detector detects, within a second azimuth detection area whose angular range is defined by d2, the azimuth of the target based on the signals generated by the second antenna element and the first antenna element located at the end of the array.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: April 26, 2011
    Assignee: Denso Corporation
    Inventor: Takamasa Ando
  • Patent number: 7924214
    Abstract: In an azimuth detecting apparatus, a receiver includes antenna elements arranged at predetermined intervals d. A first signal producer produces, based on reception signals generated by the antenna elements, first signals which are equivalent to signals generated by antenna elements arranged at first intervals d1, d1 being an integral multiple of d. A second signal producer produces, based on the reception signals, second signals which are equivalent to signals generated by antenna elements arranged at second intervals d2, d2 being an integral multiple of d and greater than d1. A first azimuth detector detects, within a first azimuth detection area whose angular range is defined by d1, the azimuth of the target based on the first signals. A second azimuth detector detects, within a second azimuth detection area whose angular range is defined by d2, the azimuth of the target based on the second signals.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: April 12, 2011
    Assignee: Denso Corporation
    Inventor: Takamasa Ando
  • Publication number: 20100277359
    Abstract: A vehicle radar apparatus that controls millimeter-wave radar operation is provided. The radar apparatus is configured to control the radar operation based on the speed of the vehicle. In the radar apparatus, the vehicle speed is detected and the output power of the radar apparatus (radar output power) is controlled such that the radar output power is set with at least two different output power levels in response to the vehicle speed.
    Type: Application
    Filed: May 1, 2010
    Publication date: November 4, 2010
    Applicant: DENSO CORPORATION
    Inventor: Takamasa Ando
  • Publication number: 20100246967
    Abstract: An image processing device that can highly precisely correct an image with a degraded image quality due to the unnecessary diffracted light generated in the optical system including the diffractive optical element is provided.
    Type: Application
    Filed: September 11, 2009
    Publication date: September 30, 2010
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20100110547
    Abstract: In a refraction lens having an aspheric shape formed thereon and having a positive power, a diffraction grating is formed on at least one of the faces of the refraction lens. In order to reduce the curvature of field and the chromatic aberration in a well-balanced manner, the zonal pitch of the diffraction grating is constituted so as to satisfy the following conditional expression. [ eq . ? 19 ] 0.21 ? ? m 2 ? v d ? ? ? f h max < ? min < 0.30 ? ? m 2 ? v d ? ? ? f h max ( 1 ) Herein, ?min is a minimum zonal pitch 12; m is an order of diffraction; ?d is an Abbe number of the lens substrate material with respect to the d-line; ? is a wavelength; f is an effective focal length; and hmax is an effective radius 13 of the face on which the diffraction grating is formed.
    Type: Application
    Filed: January 21, 2008
    Publication date: May 6, 2010
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20100085559
    Abstract: [Object] A measurement method and an evaluating apparatus are provided which are capable of easily and accurately evaluating the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens. [Means for Attaining the Object] Light emitted from a white light source 11 passes through a wavelength band-pass filter 12 and is diaphragmed by a pinhole slit 13. The resultant light is paralleled by a collimator lens 14 and enters a diffraction optical element 16 as an imaging lens. The light getting out from the diffraction optical element 16 is converged to be a spot beam 17, is magnified by a microscope 18, and is then projected on a CCD 19.
    Type: Application
    Filed: December 13, 2007
    Publication date: April 8, 2010
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20090303105
    Abstract: In an azimuth detecting apparatus, a receiver includes antenna elements arranged at predetermined intervals d. A first signal producer produces, based on reception signals generated by the antenna elements, first signals which are equivalent to signals generated by antenna elements arranged at first intervals d1, d1 being an integral multiple of d. A second signal producer produces, based on the reception signals, second signals which are equivalent to signals generated by antenna elements arranged at second intervals d2, d2 being an integral multiple of d and greater than d1. A first azimuth detector detects, within a first azimuth detection area whose angular range is defined by d1, the azimuth of the target based on the first signals. A second azimuth detector detects, within a second azimuth detection area whose angular range is defined by d2, the azimuth of the target based on the second signals.
    Type: Application
    Filed: June 8, 2009
    Publication date: December 10, 2009
    Applicant: DENSO CORPORATION
    Inventor: Takamasa Ando
  • Publication number: 20090303107
    Abstract: In an azimuth detecting apparatus, a receiver includes a plurality of first antenna elements and a second antenna element. The first antenna elements are arranged at first intervals d1 to form an array. The second antenna element is arranged to define a second interval d2 between itself and one of the first antenna elements which is located at an end of the array, where d2 is less than d1. A first azimuth detector detects, within a first azimuth detection area whose angular range is defined by d1, the azimuth of a target based on the signals generated by all the first antenna elements. A second azimuth detector detects, within a second azimuth detection area whose angular range is defined by d2, the azimuth of the target based on the signals generated by the second antenna element and the first antenna element located at the end of the array.
    Type: Application
    Filed: June 9, 2009
    Publication date: December 10, 2009
    Applicant: DENSO CORPORATION
    Inventor: Takamasa Ando
  • Publication number: 20090225215
    Abstract: A diffractive imaging lens 10 includes a surface on which a diffraction grating pattern is formed. The diffraction grating pattern is formed of a plurality of steps formed concentrically with an optical axis (25) at a center. The diffraction grating pattern is formed such that a first portion where amounts (di) of the steps are substantially the same in a radial direction of concentric circles and a second portion, outside of the first portion, where amounts (di) of the steps decrease with distance from the optical axis 25 are provided, or such that the amounts (di) of the steps decrease with distance from the optical axis 25 over the entire diffraction grating pattern.
    Type: Application
    Filed: May 11, 2007
    Publication date: September 10, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Tsuguhiro Korenaga, Takamasa Ando, Masa-aki Suzuki
  • Publication number: 20090180186
    Abstract: A diffractive optical element that can maintain transparency and be molded easily, and a method for manufacturing the same are provided. A diffractive optical element (10) includes a substrate (11), a protective film (13a, 13b), and a diffraction grating (12a, 12b) disposed between the substrate (11) and the protective film (13a, 13b), wherein the diffraction grating (12a, 12b) is formed of a composite material containing a resin and inorganic particles, a volume ratio of the inorganic particles with respect to the composite material is equal to or smaller than 50% by volume, and the diffraction grating (12a, 12b) has a thickness of equal to or smaller than 20 ?m. Since the diffractive optical element (10) uses the composite material containing the resin and the inorganic particles as a material for the diffraction grating (12a, 12b), which is relatively difficult to process, the moldability improves compared with the conventional case of using glass, etc.
    Type: Application
    Filed: April 5, 2007
    Publication date: July 16, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Takamasa Ando, Tsuguhiro Korenaga, Masa-aki Suzuki, Yuka Okada
  • Patent number: 7142289
    Abstract: In a radar apparatus, a laser light generating device generates a laser light. An optical device reflects the laser light to output it in a predetermined direction. The optical device has at least two reflective surfaces with different reflectance to the laser light. A reflected light detecting device detects a reflected light when the laser light is reflected by an object. An object detecting device detects the object based on the reflected light. An intensity changing device changes an intensity of the outputted laser light by switching the reflective surfaces. Thus, it can be prevented that an intensity of the reflected light becomes too large and an accuracy of detection of the object can be improved.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: November 28, 2006
    Assignee: Denso Corporation
    Inventors: Takamasa Ando, Takekazu Terui, Makoto Inomata
  • Patent number: 7108179
    Abstract: An object detecting apparatus for detecting an object or a distance with the object includes at least one light receiving element for detecting a light quantity entering from a sensor window portion for example, a projection window portion and an entrance window portion through which an electromagnetic wave from an electromagnetic wave generation portion toward an object and a reflected electromagnetic wave from the object pass. Furthermore, an irregularity determining portion determines a state of at least one of the projection window portion and the entrance window portion using at least the detected light quantity of the light receiving element. For example, the light receiving element includes a first light receiving portion and a second light receiving portion which receive the light quantities of direct current part of light entering from the first and second light receiving portions.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: September 19, 2006
    Assignee: DENSO Corporation
    Inventors: Takamasa Ando, Yoshiaki Hoashi, Takekazu Terui
  • Publication number: 20050205672
    Abstract: An object detecting apparatus for detecting an object or a distance with the object includes at least one light receiving element for detecting a light quantity entering from a sensor window portion for example, a projection window portion and an entrance window portion through which an electromagnetic wave from an electromagnetic wave generation portion toward an object and a reflected electromagnetic wave from the object pass. Furthermore, an irregularity determining portion determines a state of at least one of the projection window portion and the entrance window portion using at least the detected light quantity of the light receiving element. For example, the light receiving element includes a first light receiving portion and a second light receiving portion which receive the light quantities of direct current part of light entering from the first and second light receiving portions.
    Type: Application
    Filed: March 15, 2005
    Publication date: September 22, 2005
    Inventors: Takamasa Ando, Yoshiaki Hoashi, Takekazu Terui
  • Publication number: 20050046823
    Abstract: In a radar apparatus, a laser light generating device generates a laser light. An optical device reflects the laser light to output it in a predetermined direction. The optical device has at least two reflective surfaces with different reflectance to the laser light. A reflected light detecting device detects a reflected light when the laser light is reflected by an object. An object detecting device detects the object based on the reflected light. An intensity changing device changes an intensity of the outputted laser light by switching the reflective surfaces. Thus, it can be prevented that an intensity of the reflected light becomes too large and an accuracy of detection of the object can be improved.
    Type: Application
    Filed: June 29, 2004
    Publication date: March 3, 2005
    Inventors: Takamasa Ando, Takekazu Terui, Makoto Inomata