Patents by Inventor Katsushi Ota
Katsushi Ota 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: 11936162Abstract: A light source device includes a semiconductor laser that has a first end surface and a second end surface parallel to each other and forming a first resonator, and an optical system that is disposed on an optical path of laser light emitted from the semiconductor laser, that forms a second resonator with the second end surface of the semiconductor laser, and that has a reflection characteristic in which a reflectance with respect to light having a previously specified wavelength width centered at a specified center wavelength of the semiconductor laser is higher than the reflectance of the first end surface.Type: GrantFiled: July 8, 2021Date of Patent: March 19, 2024Assignees: YOKOGAWA ELECTRIC CORPORATION, YOKOGAWA TEST & MEASUREMENT CORPORATIONInventors: Katsushi Ota, Tsukasa Kokubo
-
Publication number: 20220341813Abstract: An optical pulse tester includes an optical divider configured to cause a return light to divide into first divided light and second divided light, a first optical receiver configured to receive the first divided light and output a first optical receiver signal, a second optical receiver configured to receive the second divided light and output a second optical receiver signal, and a signal processor configured to obtain a waveform indicating an intensity distribution of the return light in a longitudinal direction of the optical fiber by performing level conversion of the first optical receiver signal and the second optical receiver signal on the basis of a divided ratio of the optical divider and optical receiver sensitivities of the first optical receiver and the second optical receiver and synthesizing the first optical receiver signal and the second optical receiver signal which have been subjected to the level conversion.Type: ApplicationFiled: April 7, 2022Publication date: October 27, 2022Inventors: Akira TAKIKAWA, Shoichi AOKI, Katsushi OTA, Haruyoshi UCHIYAMA
-
Publication number: 20220341812Abstract: An optical pulse tester is for testing characteristics of an optical fiber on the basis of return light obtained by causing an optical pulse to be incident on the optical fiber. The optical pulse tester includes a plurality of light source elements configured to emit optical pulses of different wavelength bands, a plurality of light receiving elements provided to correspond to the plurality of light source elements, a first spatial optical system in which the optical pulses emitted from the plurality of light source elements are spatially combined by wavelength to be incident on the optical fiber, and a second spatial optical system in which return light from the optical fiber is spatially separated by wavelength to be incident on the plurality of light receiving elements.Type: ApplicationFiled: April 7, 2022Publication date: October 27, 2022Inventors: Haruyoshi UCHIYAMA, Shoichi AOKI, Katsushi OTA, Akira TAKIKAWA
-
Publication number: 20220021184Abstract: A light source device includes a semiconductor laser that has a first end surface and a second end surface parallel to each other and forming a first resonator, and an optical system that is disposed on an optical path of laser light emitted from the semiconductor laser, that forms a second resonator with the second end surface of the semiconductor laser, and that has a reflection characteristic in which a reflectance with respect to light having a previously specified wavelength width centered at a specified center wavelength of the semiconductor laser is higher than the reflectance of the first end surface.Type: ApplicationFiled: July 8, 2021Publication date: January 20, 2022Applicants: YOKOGAWA ELECTRIC CORPORATION, YOKOGAWA TEST & MEASUREMENT CORPORATIONInventors: Katsushi Ota, Tsukasa Kokubo
-
Patent number: 11175458Abstract: A multi-fiber connector fiber-optic measurement device identifies a polarity type and measures an optical power of a multi-fiber connector fiber-optic patch cord. The device includes: a beam splitter that splits light from the multi-fiber connector fiber-optic patch cord into a plurality of lights; a first optical sensor that receives one of the lights split by the beam splitter and outputs a first signal according to the received light; a second optical sensor that receives another of the lights split by the beam splitter and outputs a second signal according to the received light; and a signal processor that calculates the optical power based on the first signal and identifies the polarity type based on the second signal.Type: GrantFiled: May 28, 2020Date of Patent: November 16, 2021Assignees: YOKOGAWA ELECTRIC CORPORATION, Yokogawa Test & Measurement CorporationInventors: Katsushi Ota, Toshikazu Yamamoto
-
Publication number: 20200379177Abstract: A multi-fiber connector fiber-optic measurement device identifies a polarity type and measures an optical power of a multi-fiber connector fiber-optic patch cord. The device includes: a beam splitter that splits light from the multi-fiber connector fiber-optic patch cord into a plurality of lights; a first optical sensor that receives one of the lights split by the beam splitter and outputs a first signal according to the received light; a second optical sensor that receives another of the lights split by the beam splitter and outputs a second signal according to the received light; and a signal processor that calculates the optical power based on the first signal and identifies the polarity type based on the second signal.Type: ApplicationFiled: May 28, 2020Publication date: December 3, 2020Applicants: YOKOGAWA ELECTRIC CORPORATION, Yokogawa Test & Measurement CorporationInventors: Katsushi Ota, Toshikazu Yamamoto
-
Patent number: 10499551Abstract: An electronic component mounting system is disclosed. An elapsed time acquiring section acquires an elapsed time from printing onto circuit board by solder printer. A raising and lowering operation changing section changes raising and lowering operation of component holding tool based on the elapsed time from printing acquired by the elapsed time acquiring section. A mounter mounts an electronic component on the solder printed on circuit board by performing raising and lowering of the component holding tool at the raising and lowering operation changed by the raising and lowering operation changing section.Type: GrantFiled: September 19, 2014Date of Patent: December 3, 2019Assignee: FUJI CORPORATIONInventor: Katsushi Ota
-
Patent number: 10064320Abstract: A component mounter which picks components which are stored in tape and supplied from a component supply device by a component picking device and mounts components on a board which is conveyed by a board conveyance device including a waste box which stores the cut tape after the components are picked, a scraping out device which can scrape the tape out of the waste box, and a control device which controls scraping out the stored tape by the scraping out device when the tape is stored in the waste box to a predetermined amount.Type: GrantFiled: July 2, 2012Date of Patent: August 28, 2018Assignee: FUJI CORPORATIONInventors: Hidetoshi Kawai, Masafumi Amano, Katsushi Ota, Kazuhiro Asada, Tsutomu Kunihiro
-
Publication number: 20170273227Abstract: An electronic component mounting system is disclosed. An elapsed time acquiring section acquires an elapsed time from printing onto circuit board by solder printer. A raising and lowering operation changing section changes raising and lowering operation of component holding tool based on the elapsed time from printing acquired by the elapsed time acquiring section. A mounter mounts an electronic component on the solder printed on circuit board by performing raising and lowering of the component holding tool at the raising and lowering operation changed by the raising and lowering operation changing section.Type: ApplicationFiled: September 19, 2014Publication date: September 21, 2017Applicant: FUJI MACHINE MFG. CO., LTD.Inventor: Katsushi OTA
-
Publication number: 20150208561Abstract: A component mounter which picks components which are stored in tape and supplied from a component supply device by a component picking device and mounts components on a board which is conveyed by a board conveyance device including a waste box which stores the cut tape after the components are picked, a scraping out device which can scrape the tape out of the waste box, and a control device which controls scraping out the stored tape by the scraping out device when the tape is stored in the waste box to a predetermined amount.Type: ApplicationFiled: July 2, 2012Publication date: July 23, 2015Applicant: FUJI MACHINE MFG. CO., LTDInventors: Hidetoshi Kawai, Masafumi Amano, Katsushi Ota, Kazuhiro Asada, Tsutomu Kunihiro