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: 20130145608
    Abstract: A method for designing a diffraction grating lens of the present invention is a method for designing a diffraction grating lens having a diffraction grating composed of a plurality of diffraction zones, the method including the steps of: (a) determining widths of the plurality of diffraction zones; and (b) determining an aspherical coefficient of a diffraction surface on which the diffraction grating is provided while the determined widths of the plurality of diffraction zones are fixed, after the step (a).
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 8441728
    Abstract: A diffractive lens 11 that 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: Grant
    Filed: December 18, 2009
    Date of Patent: May 14, 2013
    Assignee: Panasonic Corporation
    Inventors: Tsuguhiro Korenaga, Takamasa Ando
  • Patent number: 8390799
    Abstract: 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.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: March 5, 2013
    Assignee: Panasonic Corporation
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 8384996
    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: Grant
    Filed: June 12, 2009
    Date of Patent: February 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 8346010
    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: Grant
    Filed: September 11, 2009
    Date of Patent: January 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120300301
    Abstract: An imaging optical system according to the present invention includes: at least one diffraction grating lens with a diffraction grating that is made up of q diffraction ring zones; and a stop. A surface of the at least one diffraction grating lens that has the diffraction grating is a lens surface that is located closest to the stop. Supposing the respective widths of diffraction ring zones that are located first, second, (m?1)th and mth closest to the optical axis of the optical system are identified by P1, P2, Pm-1 and Pm, at least one m that falls within the range 3<m?q satisfies the following Inequality (3): k = ( 1 P m - 1 · P m - 1 - P m P m - 1 · P m ) ( 1 P 1 · P 1 - P 2 P 1 · P 2 ) > 1.
    Type: Application
    Filed: December 9, 2011
    Publication date: November 29, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 8284388
    Abstract: A measurement method and an evaluating apparatus are provided which accurately evaluate 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. Light emitted from a white light source passes through a wavelength band-pass filter and is diaphragmed by a pinhole slit. The resultant light is paralleled by a collimator lens and enters a diffraction optical element as an imaging lens. The light getting out from the diffraction optical element is converged to be a spot beam, is magnified by a microscope 18, and is then projected on a CCD. A distance changing member changes the distance between the CCD and the diffraction optical element, and then, the intensity distribution in the optical axis direction is measured.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: October 9, 2012
    Assignee: Panasonic Corporation
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120243096
    Abstract: A diffraction grating lens according to the present invention includes a lens body and a diffraction grating provided on the surface of the lens body, the diffraction grating including a plurality of annular zones having slopes inclined along a width direction and a plurality of step surfaces respectively located between the plurality of annular zones. At least one of the plurality of annular zones is light-transmissive across its entire area along the width direction, and in the at least one annular zone, a light transmittance near at least one of two ends along the width direction is smaller than a light transmittance near a central portion along the width direction.
    Type: Application
    Filed: December 28, 2010
    Publication date: September 27, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120182618
    Abstract: A diffraction grating lens according to the present invention includes a lens body 171, and a diffraction grating which has been formed on the surface of the lens body 171 and which includes diffraction steps and concentric annular zones. Each annular zone is interposed between two adjacent ones of the diffraction steps. The lens body 171 is made of a first material that has a refractive index n1 (?) at an operating wavelength ?. The diffraction grating is in contact with the air. At least one of the annular zones has one of a recess 11 and a protrusion 12 provided for at least a part of the inner end portion thereof and the other provided for at least a part of the outer end portion thereof, respectively. The diffraction grating lens satisfies the relation 0.9 ? d ? m · ? n 1 ? ( ? ) - 1 ? 1.1 ? d where d represents a designed step length of the diffraction step 14 and m represents an order of diffraction.
    Type: Application
    Filed: August 11, 2011
    Publication date: July 19, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Yuka Okada, Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120170121
    Abstract: A diffraction grating lens according to the present invention is a diffraction grating lens 11 including: a lens body 12; and a plurality of diffraction steps relative to a base shape and a plurality of diffraction gratings 13 interposed between the diffraction steps, provided on a surface of the lens body 12. The lens body 12 is made of a first material having a refractive index n1(?) at a used wavelength ?; the diffraction grating 13 is in contact with air; and the relationship of an inequality below is satisfied, where d is a design step length of the diffraction steps, and m is an order of diffraction.
    Type: Application
    Filed: August 12, 2011
    Publication date: July 5, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Yuka Okada, Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120140209
    Abstract: A measurement method and an evaluating apparatus are provided which accurately evaluate 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. Light emitted from a white light source passes through a wavelength band-pass filter and is diaphragmed by a pinhole slit. The resultant light is paralleled by a collimator lens and enters a diffraction optical element as an imaging lens. The light getting out from the diffraction optical element is converged to be a spot beam, is magnified by a microscope 18, and is then projected on a CCD. A distance changing member changes the distance between the CCD and the diffraction optical element, and then, the intensity distribution in the optical axis direction is measured.
    Type: Application
    Filed: November 30, 2011
    Publication date: June 7, 2012
    Applicant: Panasonic Corporation
    Inventors: Takamasa ANDO, Tsuguhiro Korenaga
  • Publication number: 20120113518
    Abstract: A diffraction grating lens of the present invention includes a lens base 51 having a surface 51b obtained by providing a diffraction grating 52 on a base shape. The diffraction grating 52 includes a plurality of zones 61A and 61B and a plurality of first diffraction steps 65A and second diffraction steps 65B located between the plurality of zones; the lens base is made of a first material whose refractive index is n1(?) at a working wavelength ?; and the first diffraction steps 65A and the second diffraction steps 65B have substantially the same height d. The height d satisfies Expression (1) below, where m denotes a diffraction order. A first surface 66A on which tips 63A of the first diffraction steps 65A are located and a second surface 66B on which tips 63B of the second diffraction steps 65B are located are at different positions from each other on an optical axis 53.
    Type: Application
    Filed: October 26, 2010
    Publication date: May 10, 2012
    Inventors: Takamasa Ando, Seiji Nishiwaki, Tsuguhiro Korenaga
  • Publication number: 20120112955
    Abstract: A peak detecting threshold determining method is provided which determines a peak detecting threshold which is used by an FMCW radar in detecting a peak frequency component which appears as representing a target object in a frequency spectrum. A CW radar wave is transmitted to produce a CW noise spectrum. An offset is added to frequency components in a high-frequency region of the CW noise spectrum to define a first distribution as a value of the peak detecting threshold. This enables the value of the peak detecting threshold in the high-frequency region to be determined with high precision by reflecting a receiver noise containing a leakage noise.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 10, 2012
    Applicant: DENSO CORPORATION
    Inventors: Takamasa Ando, Kazuma Natsume
  • Publication number: 20120105300
    Abstract: A radome covers an antenna substrate of a millimeter-band radar apparatus, with a partition wall formed integrally in the radome separating the internal space of the radome into a first internal space, located in correspondence with a transmitting antenna section, and a second internal space, located in correspondence with a receiving antenna section. Increased isolation between transmission and reception is achieved thereby, by reducing the amount of transmitted radar waves which directly reach the receiving antenna section.
    Type: Application
    Filed: September 21, 2011
    Publication date: May 3, 2012
    Applicant: DENSO CORPORATION
    Inventors: Takamasa Ando, Kazuma Natsume
  • Publication number: 20120092769
    Abstract: A diffractive lens according to the present invention has the function of focusing light. The diffractive lens has a side on which a diffraction grating is arranged on either an aspheric surface or a spherical surface in its effective area. The diffraction grating has n0 phase steps, which are arranged concentrically around the optical axis of the diffractive lens. And the radius rn of the circle formed by an nth one (where n is an integer that falls within the range of 0 through n0) of the phase steps as counted from the optical axis of the diffractive lens satisfies rn=?{square root over (a{(n+c+dn)?b(n+c+dn)m})}{square root over (a{(n+c+dn)?b(n+c+dn)m})} where a, b, c and m are constants that satisfy a>0, 0?c<1, m>1, and 0.05 ? b 0 < b < b 0 b 0 = 1 mn 0 m - 1 and dn is an arbitrary value that satisfies ?0.25<dn<0.25.
    Type: Application
    Filed: April 28, 2011
    Publication date: April 19, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Seiji Nishiwaki, Takamasa Ando, Tsuguhiro Korenaga
  • Patent number: 8154803
    Abstract: 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: Grant
    Filed: April 5, 2007
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Takamasa Ando, Tsuguhiro Korenaga, Masa-aki Suzuki, Yuka Okada
  • Publication number: 20120075704
    Abstract: An imaging optical system according to the present invention includes a lens that has first and second surfaces and that has a diffraction grating on only one of the first and second surfaces. If the diameter of an effective area, which is defined by a light ray that has entered the lens with a maximum angle of view, is D when measured on the surface with the diffraction grating, an F number of the imaging optical system at the maximum angle of view is Fno, a d-line Abbe number of the lens is ?d, and an F number of an axial bundle of rays is F, then the average diffracting ring zone pitch of the effective area satisfies 0.008 ? ? D × Fno ? 0.
    Type: Application
    Filed: June 4, 2010
    Publication date: March 29, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Takamasa Ando, Tsuguhiro Korenaga
  • Publication number: 20120069327
    Abstract: 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.
    Type: Application
    Filed: November 30, 2011
    Publication date: March 22, 2012
    Applicant: Panasonic Corporation
    Inventors: Takamasa ANDO, Tsuguhiro Korenaga
  • Publication number: 20120050091
    Abstract: Four rows on one side of linear arrays arranged at equal intervals in the vertical direction and arranged at a predetermined interval in the horizontal direction form transmission channels and remaining twelve rows form a reception channel group. Among the remaining twelve rows, linear arrays of four rows in the center form a reception-first-array with each row set as a channel unit. Linear arrays of eight rows on both sides form a reception-second-array with two rows set as a channel unit. In wide-angle-middle-detection-processing, signals are combined using the reception-first-array. In long-detection-processing, signals are combined using the reception-second-array. Second null of a radiation pattern by a transmission array and first null of the reception-second-array are matched. The first null of the transmission array is filled such that a gain difference between the first null and a first side lobe of the transmission array is within a predetermined value.
    Type: Application
    Filed: March 17, 2010
    Publication date: March 1, 2012
    Applicants: DENSO CORPORATION, MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuyoshi Inami, Takamasa Ando
  • Patent number: 8106993
    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: Grant
    Filed: May 11, 2007
    Date of Patent: January 31, 2012
    Assignee: Panasonic Corporation
    Inventors: Tsuguhiro Korenaga, Takamasa Ando, Masa-aki Suzuki