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公开(公告)号：US11240402B2
公开(公告)日：2022-02-01
申请号：US15869830
申请日：2018-01-12
Applicant: Hitachi, Ltd.
Inventor： Shinsuke Onoe , Toshiteru Nakamura , Kenichiro Yamada , Takahiro Matsuda , Yoshiho Seo
Abstract: An optical scanning device for displaying or capturing an image is used, the device including: an optical scanning unit configured to scan emitted light while drawing a spiral trajectory, wherein the unit includes: a light guide path configured to guide incident light to output the emitted light from an emission end; and a vibration unit configured to vibrate the emission end; a light emission control unit configured to control light emission of the emitted light; a polar coordinate generation unit configured to generate a radius and a deflection angle relating to the spiral trajectory; a driving signal generation unit configured to generate a driving signal for driving the vibration unit; an angle correction unit configured to perform calculation for correcting an angle based on information from the driving signal generation unit and output an corrected angle; and a coordinate calculation unit configured to calculate coordinates of an image.
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公开(公告)号：US10413187B2
公开(公告)日：2019-09-17
申请号：US15580072
申请日：2016-03-24
Applicant: Hitachi, Ltd.
Inventor： Toshiteru Nakamura , Satoshi Ouchi , Yoshiho Seo , Kouji Fujita , Shinsuke Onoe , Kenichiro Yamada , Tomoto Kawamura
Abstract: An object of the invention is to provide a technology for further improving scanning performance. Provided is an optical scanning device including: a scanning unit including an optical waveguide configured to guide incident light and emit the light from an emission end, and a vibration unit configured to generate a vibration and vibrate the emission end; and a signal transmission unit configured to transmit a signal to the scanning unit and cause the scanning unit to scan an object, characterized in that the scanning unit includes a first bonding and vibration attenuating unit configured to bond, with an elastic member, an end surface of the vibration unit closer to the emission end and the optical waveguide.
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公开(公告)号：US11212423B2
公开(公告)日：2021-12-28
申请号：US16627914
申请日：2018-06-01
Applicant: Hitachi, Ltd.
Inventor： Takahiro Matsuda , Yoshiho Seo , Satoshi Ouchi , Shinsuke Onoe
Abstract: To propose an optical scanning method for a video device including an optical scanning unit in which one end of a light guide path has a protruding beam-shaped structure. The video device includes the optical scanning unit having the light guide path in which light enters from one end and emits from the other end, and a vibration unit configured to apply vibration to the light guide path via a joint unit in a vicinity of the other end of the light guide path; a drive signal generation unit that generates a drive signal for inducing vibration in the vibration unit; and a scanning trajectory control unit which has a function of independently vibrating the light guide path in a first direction substantially perpendicular to an optical axis direction of the light guide path, and in a second direction substantially perpendicular to the optical axis direction of the light guide path and substantially perpendicular to the first direction by the vibration unit, and which generates a first drive signal configured to drive the vibration unit in the first direction and a second drive signal configured to drive the vibration unit in the second direction with any pattern. The scanning trajectory control unit generates the first drive signal and the second drive signal as sine waves having different phases and a substantially same frequency, and sets a modulation amount of an amplitude modulation of a sine wave of the second drive signal to be larger than a modulation amount of an amplitude modulation of a sine wave of the first drive signal.
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公开(公告)号：US11317812B2
公开(公告)日：2022-05-03
申请号：US16223146
申请日：2018-12-18
Applicant: HITACHI, LTD.
Inventor： Shinsuke Onoe , Takahiro Matsuda , Yoshiho Seo , Satoshi Ouchi , Tomohiko Tanaka , Taiichi Takezaki , Ryo Imai
IPC: G01S17/08 , A61B5/00 , G02B26/10 , H01L41/04 , H01L41/09 , G01N29/24 , G01S7/481 , G02B26/08 , G01S17/89
Abstract: An optical scanning device includes: an optical scanning unit configured to repeatedly scan an irradiation destination of irradiation light to a predetermined trajectory; a light emission control unit configured to control light emission of the irradiation light to irradiate irradiation points to the predetermined trajectory; and a driving signal generation unit configured to generate a driving signal for driving the optical scanning unit, wherein the light emission control unit irradiates the irradiation points to the predetermined trajectory so that the irradiation points are substantially uniformly dispersed in a region in which a density of the irradiation points is relatively low in a region in which the irradiation light is irradiated.
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