Patents by Inventor Tsuyoshi Maro
Tsuyoshi Maro 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: 11865964Abstract: An optical apparatus capable of correcting field curvature easily, a method for manufacturing the optical apparatus, and a headlight including the optical apparatus. A lens, a plurality of solid-state light sources, and a substrate on which the solid-state light sources are mounted. The substrate includes a base material, which is rigid, and a mount surface, which is formed on the base material in a curved surface shape that substantially matches a focal plane shape of the lens, and on which a circuit pattern is formed. The solid-state light sources are mounted on the mount surface, and the substrate is positioned with respect to the lens such that a position of a focal plane of the lens substantially coincides with emission surfaces of the solid-state light sources, and thus field curvature can be easily corrected.Type: GrantFiled: March 4, 2021Date of Patent: January 9, 2024Assignee: MAXELL, LTD.Inventors: Tsuyoshi Maro, Atsushi Yusa, Naoki Hiratoge, Junichi Yokoyama
-
Publication number: 20230139866Abstract: An optical apparatus capable of correcting field curvature easily, a method for manufacturing the optical apparatus, and a headlight including the optical apparatus. A lens, a plurality of solid-state light sources, and a substrate on which the solid-state light sources are mounted. The substrate includes a base material, which is rigid, and a mount surface, which is formed on the base material in a curved surface shape that substantially matches a focal plane shape of the lens, and on which a circuit pattern is formed.Type: ApplicationFiled: March 4, 2021Publication date: May 4, 2023Applicant: MAXELL, LTD.Inventors: Tsuyoshi MARO, Atsushi YUSA, Naoki HIRATOGE, Junichi YOKOYAMA
-
Publication number: 20220030675Abstract: A method of manufacturing the microwave oven cooking utensil includes: an upper heating body and a lower heating body each of which absorbs a microwave and generates a heat; and a heating space for heating a food material located between the upper heating body and the lower heating body, the heating being performed from above and below at the same time. Here, the upper heating body and the lower heating body are each formed by including a heat generating part containing ferrite and a molded foam body.Type: ApplicationFiled: March 13, 2020Publication date: January 27, 2022Applicant: MAXELL, LTD.Inventors: Tsuyoshi MARO, Satoshi MATSUNUMA, Masayuki KATO
-
Publication number: 20110298911Abstract: An imaging module for biometrics authentication comprises: a light source irradiating a living body with light capable of passing through the living body; a prism having an incidence surface including an incidence area for taking in light emerging from the living body, two or more reflecting surfaces for reflecting the light taken in through the incidence area, and an outlet surface for outputting the light reflected by the reflecting surfaces; and a camera module including a lens for focusing the light emerging from the outlet surface of the prism and an image pickup device for converting the light focused thereon by the lens into an electric signal and outputting the electric signal.Type: ApplicationFiled: August 22, 2011Publication date: December 8, 2011Inventors: Tsuyoshi MARO, Akito Sakemoto, Akihiko Soya, Takashi Sugiyama, Masaki Yamazaki
-
Patent number: 8027519Abstract: An imaging module for biometrics authentication comprises: a light source irradiating a living body with light capable of passing through the living body; a prism having an incidence surface including an incidence area for taking in light emerging from the living body, two or more reflecting surfaces for reflecting the light taken in through the incidence area, and an outlet surface for outputting the light reflected by the reflecting surfaces; and a camera module including a lens for focusing the light emerging from the outlet surface of the prism and an image pickup device for converting the light focused thereon by the lens into an electric signal and outputting the electric signal.Type: GrantFiled: December 12, 2007Date of Patent: September 27, 2011Assignee: Hitachi Maxwell, Ltd.Inventors: Tsuyoshi Maro, Akito Sakemoto, Akihiko Soya, Takashi Sugiyama, Masaki Yamazaki
-
Patent number: 7988371Abstract: A camera module includes a mount for holding a lens directly or indirectly, a cover plate glass with transparency fixed to the mount. A solid-state imaging device is mounted on the cover plate glass. The cover plate contacts a plurality of ribs formed in the mount, and the mount and the cover plate are positioned.Type: GrantFiled: February 2, 2007Date of Patent: August 2, 2011Assignee: Hitachi Maxell, Ltd.Inventors: Susumu Aoki, Tsuyoshi Maro
-
Publication number: 20080175444Abstract: An imaging module for biometrics authentication comprises: a light source irradiating a living body with light capable of passing through the living body; a prism having an incidence surface including an incidence area for taking in light emerging from the living body, two or more reflecting surfaces for reflecting the light taken in through the incidence area, and an outlet surface for outputting the light reflected by the reflecting surfaces; and a camera module including a lens for focusing the light emerging from the outlet surface of the prism and an image pickup device for converting the light focused thereon by the lens into an electric signal and outputting the electric signal.Type: ApplicationFiled: December 12, 2007Publication date: July 24, 2008Applicant: HITACHI MAXELL, LTD.Inventors: Tsuyoshi Maro, Akito Sakemoto, Akihiko Soya, Takashi Sugiyama, Masaki Yamazaki
-
Patent number: 7389050Abstract: For use in combining and/or splitting a 3-wavelength multiplexed light, in which if central wavelengths of the three bands are denoted as ?1, ?2 and ?3, in a relation that 0.92??2/?1?1.08, 0.20??3/?1?0.92 or 1.08??3/?1?5.00, the wavelength multiplexing and demultiplexing device comprises two optical filters of different characteristics, supported by one of more optical substrates combined in a single package, wherein, when a 3-wavelength multiplexed light is led to a first filter A for splitting the 3-wavelength multiplexed light into light of a band of ?3 and a 2-wavelength multiplexed light of ?1 and ?2, and when the 2-wavelength multiplexed light is led to a second filter B for splitting the 2-wavelength multiplexed light into light of a band of ?1 and light of a band of ?2, an optical edge filter is used for the filter A and an optical band-pass filter is used for the filter B.Type: GrantFiled: September 16, 2004Date of Patent: June 17, 2008Assignee: Hitachi Maxell, Ltd.Inventors: Yoshiaki Minakawa, Tsuyoshi Maro
-
Publication number: 20070183773Abstract: A camera module includes a mount for holding a lens directly or indirectly, a cover plate glass with transparency fixed to the mount. A solid-state imaging device is mounted on the cover plate glass. The cover plate contacts a plurality of ribs formed in the mount, and the mount and the cover plate are positioned.Type: ApplicationFiled: February 2, 2007Publication date: August 9, 2007Applicant: HITACHI MAXELL, LTD.Inventors: Susumu Aoki, Tsuyoshi Maro
-
Patent number: 7079322Abstract: The wavelength division multiplexer includes a single optical substrate or a plurality of optical substrates integrated together, on which the first optical filter and the second optical filter are placed. The center wavelengths of three wavelength bands, ?1, ?2, and ?3, satisfy: 0.92??2/?1?1.08, and 0.20??3/?1?0.92 or 1.08??3/?1?5.00. The first optical filter combines or separates light of ?3 and two-wavelength multiplexed light of ?1 and ?2. The second optical filter combines or separates light of ?1 and light of ?2.Type: GrantFiled: September 23, 2004Date of Patent: July 18, 2006Assignee: Hitachi Maxell, Ltd.Inventors: Yoshiaki Minakawa, Tsuyoshi Maro
-
Patent number: 7027385Abstract: An optical disk 100 is provided with a hub 3 at the central portion of a substratel. A relationship Y/X?0.015, preferably Y/X?0.05 is satisfied where X is the projected area of the substrate 1 and Y is a contact area between the hub 3 and the substrate 1. As result, no slippage occurs between the hub 3 and the substrate 1 even when they are rotated at high speed than conventional. With this higher rotational speed, the data transfer rate is improved, and irregular rotation and the camming are suppressed, thereby reducing tracking errors and write/read errors.Type: GrantFiled: November 8, 1999Date of Patent: April 11, 2006Assignee: Hitachi Maxell, Ltd.Inventors: Katsusuke Shimazaki, Yuuji Yamazaki, Hikaru Mizutani, Tsuyoshi Maro, Kenji Ohta, Hiroyoshi Takagi, Katsuhiro Takahashi
-
Publication number: 20050094282Abstract: The wavelength division multiplexer includes a single optical substrate or a plurality of optical substrates integrated together, on which the first optical filter and the second optical filter are placed. The center wavelengths of three wavelength bands, ?1, ?2, and ?3, satisfy: 0.92??2/?1?1.08, and 0.20??3/?1?0.92 or 1.08??3/?1?5.00. The first optical filter combines or separates light of ?3 and two-wavelength multiplexed light of ?1 and ?2. The second optical filter combines or separates light of ?1 and light of ?2.Type: ApplicationFiled: September 23, 2004Publication date: May 5, 2005Applicant: HITACHI MAXELL, LTD.Inventors: Yoshiaki Minakawa, Tsuyoshi Maro
-
Publication number: 20050063423Abstract: For use in combining and/or splitting a 3-wavelength multiplexed light, in which if central wavelengths of the three bands are denoted as ?1, ?2 and ?3, in a relation that 0.92??2/?1?1.08, 0.20??3/?1?0.92 or 1.08??3/?1?5.00, the wavelength multiplexing and demultiplexing device comprises two optical filters of different characteristics, supported by one of more optical substrates combined in a single package, wherein, when a 3-wavelength multiplexed light is led to a first filter A for splitting the 3-wavelength multiplexed light into light of a band of ?3 and a 2-wavelength multiplexed light of ?1 and ?2, and when the 2-wavelength multiplexed light is led to a second filter B for splitting the 2-wavelength multiplexed light into light of a band of ?1 and light of a band of ?2, an optical edge filter is used for the filter A and an optical band-pass filter is used for the filter B.Type: ApplicationFiled: September 16, 2004Publication date: March 24, 2005Inventors: Yoshiaki Minakawa, Tsuyoshi Maro
-
Publication number: 20040246877Abstract: A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.Type: ApplicationFiled: July 19, 2004Publication date: December 9, 2004Applicant: Hitachi Maxell, Ltd.Inventors: Osamu Ishizaki, Katsusuke Shimazaki, Hiroyuki Awano, Reiji Tamura, Tsuyoshi Maro, Toshinori Sugiyama
-
Patent number: 6781926Abstract: A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.Type: GrantFiled: October 10, 2001Date of Patent: August 24, 2004Assignee: Hitachi Maxell, LimitedInventors: Osamu Ishizaki, Katsusuke Shimazaki, Hiroyuki Awano, Reiji Tamura, Tsuyoshi Maro, Toshinori Sugiyama
-
Patent number: 6760279Abstract: An object of the present invention is to provide a film-surface light-incident type magneto-optical recording medium which is used by means of an objective lens having a large NA value and is excellent in productivity and yield, and a magneto-optical recording apparatus. According to the present invention, there is provided a magneto-optical recording medium for conducting recording or reading-out from the film surface side of the recording medium by traveling of a flying head incorporated with an objective lens having a numerical aperture (NA) of not more than 0.95 and not less than 0.8, wherein at least a reflective film, a recording layer, a transparent dielectric layer, a transparent resin layer and a lubricant layer are laminated on a substrate in that order.Type: GrantFiled: February 13, 2002Date of Patent: July 6, 2004Assignee: Hitachi Maxell, Ltd.Inventor: Tsuyoshi Maro
-
Publication number: 20020097639Abstract: A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.Type: ApplicationFiled: October 10, 2001Publication date: July 25, 2002Applicant: Hitachi Maxell, Ltd.Inventors: Osamu Ishizaki, Katsusuke Shimazaki, Hiroyuki Awano, Reiji Tamura, Tsuyoshi Maro, Toshinori Sugiyama
-
Patent number: 6366541Abstract: A magneto-optical recording medium comprises a protective layer having a self-lubricating property formed at an uppermost layer on a side opposite to a substrate wherein a recording or reproducing light beam comes into a side of the protective layer. The thickness and the refractive index of the protective layer are selected under predetermined conditions depending on whether or not evanescent light is transmitted through the protective layer. It is possible to perform high density recording and reproduction thereof by utilizing the evanescent light. A protective layer having a self-lubricating property may be also formed on a bottom surface of an optical head opposing to the optical recording medium. Even when the optical head contacts with the surface of the optical recording medium, the sliding scratch scarcely occurs, because the optical head smoothly glides on the recording medium surface.Type: GrantFiled: October 11, 2000Date of Patent: April 2, 2002Assignee: Hitachi Maxell, Ltd.Inventors: Satoru Ohnuki, Toshinori Sugiyama, Masafumi Yoshihiro, Tsuyoshi Maro
-
Patent number: 6333900Abstract: A magneto-optical recording medium comprises, on a substrate, a reflective layer, a first dielectric layer, a recording layer, and a second dielectric layer successively in this order, for being irradiated with a recording or reproducing light beam coming from a side of the second dielectric layer. A diamond-like carbon layer as a self-lubricating layer is formed on the second dielectric layer. An optical head comprises a floating type slider installed with a solid immersion lens. A protective film having a self-lubricating property may be also formed on a bottom surface of the slider opposing to the optical recording medium. Even when the floating position of the optical head is varied, and the optical head contacts with the surface of the optical recording medium, then the sliding scratch scarcely occurs, because the optical head smoothly glides on the recording medium surface. A lubricating layer may be further formed on the self-lubricating layer.Type: GrantFiled: July 25, 2000Date of Patent: December 25, 2001Assignee: Hitachi Maxell, Ltd.Inventors: Tsuyoshi Maro, Hideo Daimon, Osamu Ishizaki, Tatsuo Araki, Takeshi Ohnuki
-
Patent number: 6333089Abstract: A cavity surface-forming plate of a mold for injection-molding a plastic substrate is coarsely polished, and then a surface for defining a cavity is applied with electroless Ni—P plating. The surface of the plating is polished with abrasive grains to obtain surface roughness of Ra≦2.0 nm and Rmax≦22 nm. The plastic substrate molded with the mold has smoothness equivalent to the polished plating surface. A concave-convex pattern for forming pits may be formed on the cavity surface. A magnetic disk or an optical disk provided with the substrate makes it possible to realize the near contact system for a magnetic or magneto-optical head. Thus, it is possible to realize high density recording.Type: GrantFiled: July 28, 2000Date of Patent: December 25, 2001Assignee: Hitachi Maxwell, Ltd.Inventors: Hiroyuki Hirata, Tatsuo Araki, Osamu Ishizaki, Hideo Daimon, Yasuhiko Kokufuda, Tsuyoshi Maro, Makoto Aihara