Patents by Inventor Renzaburo Miki
Renzaburo Miki 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: 20130063399Abstract: To produce an ultrathin and easily assembled optical pointing device by reducing the number of components, an optical pointing device (10) of the present invention includes: a light source (2) for emitting light to an object (1); a light guide (6) for propagating therethrough light scattered by the object (1), the light guide including an image forming section (4) for forming an image with use of the light scattered by the object (1); and an image capturing section (7) for capturing the image with the light that has been scattered by the object (1) and that has exited the light guide (6). The light guide (6) guides a light beam (L) from the object via no air through an optical path extending from (i) a position where the light beam (L) enters the light guide to (ii) a position where the light beam exits the light guide (6).Type: ApplicationFiled: March 3, 2011Publication date: March 14, 2013Applicant: Sharp Kabushiki KaishaInventors: Tetsushi Noro, Takahiro Miyake, Renzaburo Miki
-
Patent number: 7315502Abstract: An object of the present invention is to attain stable tracking servo performance by suppressing an offset caused by a shift of an object lens or a tilt of a disk, despite the one-beam method which does not cause reduction in light quantity of the main beam. A diffraction grating is provided between a hologram and a light receiving section, and a diffraction efficiency of the diffraction grating is varied in a grating longitudinal direction. For example, if an incident light beam on the diffraction grating is shifted in the grating longitudinal direction, the quantity of received light in each light receiving section varies to cause offset. By performing tracking servo so as to cancel the change, it is possible to correct the offset, thereby attaining stable tracking servo performance.Type: GrantFiled: November 5, 2002Date of Patent: January 1, 2008Assignee: Sharp Kabushiki KaishaInventors: Keiji Sakai, Takahiro Miyake, Tetsuo Ueyama, Renzaburo Miki, Hiroshige Makioka, Noboru Fujita, Osamu Miyazaki
-
Patent number: 7295390Abstract: Power from a focusing motor (14) is transmitted via a gear (35a) to a focusing lead screw (15) so that a first lens holder (4) is moved in a direction of an optical axis. Power from a zooming motor (10) is transmitted via a gear (35b) to a zooming lead screw (11) so that a second lens holder (8) is moved in the direction of the optical axis. The first and second lens holders (4, 8), the focusing and zooming lead screws (15, 11), the focusing and zooming motors (14, 10), and the gears (35a, 35b) are contained in a housing (30, 31). The focusing motor (14) and the zooming motor (10) may be fixed to a gear case (30).Type: GrantFiled: November 30, 2005Date of Patent: November 13, 2007Assignee: Sharp Kabushiki KaishaInventor: Renzaburo Miki
-
Patent number: 7236316Abstract: An opening direction of guide grooves formed in sub bearing portions 55, 58 are different from an opening direction of guide grooves formed in the main bearing portions 54, 57. Therefore, when the first, second lens holders 31, 32 can easily be assembled to the main guide shaft 50 and the sub guide shaft 51 by one operation that after the fitting of the sub guide shaft 51 into the guide groove of the sub bearing portion 55, 58 in the first, second lens holder 31, 32, the first, second lens holder 31, 32 is rotated and slid against the sub guide shaft 51 so that the guide groove of the main bearing portion 54, 57 is fitted to the main guide shaft 50 in Y direction.Type: GrantFiled: November 30, 2005Date of Patent: June 26, 2007Assignee: Sharp Kabushiki KaishaInventor: Renzaburo Miki
-
Patent number: 7106682Abstract: An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.Type: GrantFiled: February 16, 2005Date of Patent: September 12, 2006Assignee: Sharp Kabushiki KaishaInventors: Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Naotaka Otsuka, Renzaburo Miki, Hiroshige Hirajima, Noboru Fujita
-
Publication number: 20060114583Abstract: Power from a focusing motor (14) is transmitted via a gear (35a) to a focusing lead screw (15) so that a first lens holder (4) is moved in a direction of an optical axis. Power from a zooming motor (10) is transmitted via a gear (35b) to a zooming lead screw (11) so that a second lens holder (8) is moved in the direction of the optical axis. The first and second lens holders (4, 8), the focusing and zooming lead screws (15, 11), the focusing and zooming motors (14, 10), and the gears (35a, 35b) are contained in a housing (30, 31). The focusing motor (14) and the zooming motor (10) may be fixed to a gear case (30).Type: ApplicationFiled: November 30, 2005Publication date: June 1, 2006Applicant: Sharp Kabushiki KaishaInventor: Renzaburo Miki
-
Publication number: 20060114581Abstract: An opening direction of guide grooves formed in sub bearing portions 55, 58 are different from an opening direction of guide grooves formed in the main bearing portions 54, 57. Therefore, when the first, second lens holders 31, 32 can easily be assembled to the main guide shaft 50 and the sub guide shaft 51 by one operation that after the fitting of the sub guide shaft 51 into the guide groove of the sub bearing portion 55, 58 in the first, second lens holder 31, 32, the first, second lens holder 31, 32 is rotated and slid against the sub guide shaft 51 so that the guide groove of the main bearing portion 54, 57 is fitted to the main guide shaft 50 in Y direction.Type: ApplicationFiled: November 30, 2005Publication date: June 1, 2006Applicant: Sharp Kabushiki KaishaInventor: Renzaburo Miki
-
Publication number: 20060108427Abstract: Portable equipment (14) includes a housing (13), a first cushioning (12) and a camera module (10). The camera module (10) includes an optical component mounting portion (10A) having an optical lens and a CCD photodetecting portion, a camera module housing portion (10C) (mass body) and a second cushioning (10B). The camera module housing portion (10C) is connected to the optical component mounting portion (10A) via the second cushioning (10B). In the camera module (10), the upper surface and the bottom surface of the camera module housing portion (10C) are held by the housing (13) via the first cushioning (12). When an impact is applied to the housing (3), acceleration generated in the optical component mounting portion (10A) is reduced by the vibration of the camera module housing portion (10C). With this arrangement, the damage of the CCD photodetecting portion and so on due to a drop impact or the like can be prevented with a simple construction, allowing the portable equipment (14) to be downsized.Type: ApplicationFiled: November 22, 2005Publication date: May 25, 2006Applicant: Sharp Kabushiki KaishaInventors: Ryohhei Kawamuki, Renzaburo Miki, Toshiyuki Tanaka
-
Patent number: 7019280Abstract: The object of the invention is to accurately detect the amount of tilt in the light reflector to the optical axis of an output light with a simple configuration. A tilt sensing apparatus includes a light reflector, a light source, a condensing unit for condensing an output light from the light source onto the light reflector, and a light sensing unit for sensing the reflected light from the light reflector. An optical device provided in the condensing unit for varying the light quantity of the transmitting light has first and second optical device strips that are formed at the positions of axial symmetry about the optical axis and have a predetermined shift in the direction of a straight line of connecting the axis of the light reflector to the condensed position where the light emitted from the light source is condensed onto the light reflector by the condensing unit.Type: GrantFiled: September 17, 2002Date of Patent: March 28, 2006Assignee: Sharp Kabushiki KaishaInventors: Fumio Kokubo, Keiji Sakai, Tetsuo Ueyama, Renzaburo Miki
-
Publication number: 20050141391Abstract: An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.Type: ApplicationFiled: February 16, 2005Publication date: June 30, 2005Inventors: Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Naotaka Otsuka, Renzaburo Miki, Hiroshige Hirajima, Noboru Fujita
-
Patent number: 6868055Abstract: An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.Type: GrantFiled: July 12, 2001Date of Patent: March 15, 2005Assignee: Sharp Kabushiki KaishaInventors: Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Naotaka Otsuka, Renzaburo Miki, Hiroshige Hirajima, Noboru Fujita
-
Publication number: 20040238727Abstract: The object of the invention is to accurately detect the amount of tilt in the light reflector to the optical axis of an output light with a simple configuration. A tilt sensing apparatus includes a light reflector, a light source, a condensing unit for condensing an output light from the light source onto the light reflector, and a light sensing unit for sensing the reflected light from the light reflector. An optical device provided in the condensing unit for varying the light quantity of the transmitting light has first and second optical device strips that are formed at the positions of axial symmetry about the optical axis and have a predetermined shift in the direction of a straight line of connecting the axis of the light reflector to the condensed position where the light emitted from the light source is condensed onto the light reflector by the condensing unit.Type: ApplicationFiled: March 15, 2004Publication date: December 2, 2004Inventors: Fumio Kokubo, Keiji Sakai, Tetsuo Ueyama, Renzaburo Miki
-
Publication number: 20040156299Abstract: An object of the present invention is to attain stable tracking servo performance by suppressing an offset caused by a shift of an object lens or a tilt of a disk, despite the one-beam method which does not cause reduction in light quantity of the main beam. A diffraction grating is provided between a hologram and a light receiving section, and a diffraction efficiency of the diffraction grating is varied in a grating longitudinal direction. For example, if an incident light beam on the diffraction grating is shifted in the grating longitudinal direction, the quantity of received light in each light receiving section varies to cause offset. By performing tracking servo so as to cancel the change, it is possible to correct the offset, thereby attaining stable tracking servo performance.Type: ApplicationFiled: November 17, 2003Publication date: August 12, 2004Inventors: Keiji Sakai, Takahiro Miyake, Tetsuo Ueyama, Renzaburo Miki, Hiroshige Makioka, Noboru Fujita, Osamu Miyazaki
-
Publication number: 20020024916Abstract: An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.Type: ApplicationFiled: July 12, 2001Publication date: February 28, 2002Inventors: Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Otsuka Naotaka, Renzaburo Miki, Hiroshige Hirajima, Noboru Fujita
-
Patent number: 5410623Abstract: An optical device includes: a first dielectric slab waveguide having an effective refractive index N.sub.1 ; a second dielectric slab waveguide having an effective refractive index N.sub.2 ; and a third dielectric slab waveguide having a length 1 and an effective refractive index N.sub.3, the third dielectric slab waveguide being formed between the first dielectric slab waveguide and the second dielectric slab waveguide so as to connect the first dielectric slab waveguide with the second dielectric slab waveguides optically; wherein the length I and the effective refractive index N.sub.3 substantially satisfy following equations; ##EQU1## where .lambda. is a free-space wavelength of light traveling in the optical device and the light travels from the first dielectric slab waveguide to the third dielectric slab waveguide at an incident angle .THETA. in a single mode.Type: GrantFiled: August 24, 1993Date of Patent: April 25, 1995Assignee: Sharp Kabushiki KaishaInventors: Kouji Minami, Kuniaki Okada, Renzaburo Miki, Hiroyuki Yamamoto, Yoshio Yoshida, Yukio Kurata
-
Patent number: 5410622Abstract: An optical integrated circuit is disclosed. The optical integrated circuit includes: a dielectric waveguide having at least a waveguide layer for transmitting light in a first direction; a first reflector for reflecting the light in a substantially opposite direction to the first direction, the first reflector being formed on an end face of the waveguide layer; a grating coupler having a grating for diffracting at least a part of the light in a second direction which is different from the first direction, the grating coupler being formed at a surface of the waveguide layer; and a light detector for detecting the diffracted light, the light detector being optically connected with the dielectric waveguide.Type: GrantFiled: August 19, 1993Date of Patent: April 25, 1995Assignee: Sharp Kabushiki KaishaInventors: Kuniaki Okada, Kouji Minami, Renzaburo Miki, Hiroyuki Yamamoto, Yoshio Yoshida, Yukio Kurata