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公开(公告)号：US20220244557A1
公开(公告)日：2022-08-04
申请号：US17725907
申请日：2022-04-21
发明人： Wataru YOSHIKI , Yukari MIYAGI , Masaharu IMAKI , Takayuki NAKANO
摘要： A light pattern generation device is provided with a laser light source to emit laser light, a light scanner to deflect the laser light emitted from the laser light source, and a diffractive optical element unit including a plurality of diffractive optical element components each of which modulates at least one of phase distribution or intensity distribution of the laser light deflected by the light scanner so that the laser light that passes therethrough forms a predetermined light pattern on an image plane. The light scanner can change a deflection direction in which the laser light emitted from the laser light source is deflected so that the laser light emitted from the laser light source is deflected toward a predetermined diffractive optical element component out of the plurality of diffractive optical element components.
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公开(公告)号：US20230350071A1
公开(公告)日：2023-11-02
申请号：US18221208
申请日：2023-07-12
发明人： Masaharu IMAKI , Takayuki NAKANO , Yusuke ITO
CPC分类号： G01S17/95 , G01S7/4814 , G01N21/39
摘要： A lidar device radiating a first laser beam in an absorption band of a gas and a second laser beam having a lower absorption rate than that of the first laser beam to the gas in a space includes: a light source of a laser beam; a frequency outputter outputting a first frequency or a second frequency different from the former; a reference light outputter outputting the laser beam as reference light; a transmitter generating the first laser beam by modulating a frequency of the laser beam by the first frequency, generating the second laser beam by modulating the frequency of the laser beam by the second frequency, and radiating both to the space; and a receiver receiving the first laser beam and then scattered by the gas or the second laser beam and then similarly scattered and detect interference between the scattered light and the reference light.
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公开(公告)号：US20220244361A1
公开(公告)日：2022-08-04
申请号：US17727422
申请日：2022-04-22
发明人： Masaharu IMAKI , Takayuki NAKANO , Masahiro KAWAI
IPC分类号： G01S7/497 , G01S7/4865 , G01S7/486 , G01S17/08
摘要： A lidar control device controls a lidar device including a background light cut filter that allows transmission of reflected laser light that is laser emission light reflected by an object and suppresses transmission of background light incident on the lidar device, the lidar control device including: a filter temperature acquiring unit to acquire a filter temperature of the background light cut filter; a filter characteristic acquiring unit to acquire a filter temperature characteristic of the background light cut filter; a transmission wavelength acquiring unit to acquire a transmission wavelength of the background light cut filter on the basis of the filter temperature and the filter temperature characteristic; and a control signal generating unit to generate a control signal for causing the lidar device to emit the laser emission light having a wavelength corresponding to the transmission wavelength acquired by the transmission wavelength acquiring unit.
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公开(公告)号：US20240053590A1
公开(公告)日：2024-02-15
申请号：US18378377
申请日：2023-10-10
CPC分类号： G02B13/146 , G02B13/18 , G02B7/021
摘要： An infrared optical system includes: a spherical lens unit having an image-forming function as a whole and including one or more spherical lenses that form an image of an incident light beam from a subject; an aperture diaphragm unit that limits transmission of the incident light beam through the spherical lens unit; an aberration correcting plate unit that is disposed at a preceding stage of the spherical lens unit, has at least one aspherical surface, and gives an optical path length difference for compensating an aberration to be generated in the spherical lens unit to the incident light beam; and a lens barrel unit holding the spherical lens unit, the aperture diaphragm unit, and the aberration correcting plate unit.
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