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公开(公告)号：US12117561B2
公开(公告)日：2024-10-15
申请号：US17575216
申请日：2022-01-13
发明人： Masatsugu Nakano , Ryo Iijima , Shin Kuwashiro
IPC分类号： G01S7/481 , G01S17/931
CPC分类号： G01S7/4811 , G01S7/4817 , G01S17/931
摘要： An optical apparatus includes a deflection unit configured to deflect illumination light from a light source to scan an object and to deflect reflected light from the object, a light guiding unit configured to guide the illumination light from the light source to the deflection unit and to guide the reflected light from the deflection unit to a light receiving element, and an optical system configured to guide the illumination light from the deflection unit to the object and to guide the reflected light from the object to the deflection unit. The optical system includes a front lens unit that consists of lenses located closer to the object than an intermediate image and a rear lens unit that consists of lenses located closer to the deflection unit than the intermediate image. The rear lens unit consists of three or more and five or less positive lenses.
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公开(公告)号：US20230077822A1
公开(公告)日：2023-03-16
申请号：US17902058
申请日：2022-09-02
发明人： Ryo Iijima
摘要： Provided is a projection lens including: a first optical system configured to form an intermediate image from an enlargement conjugate side toward a reduction conjugate side; and a second optical system configured to image the intermediate image onto an imaging plane on the reduction conjugate side, wherein the first optical system at least includes a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, wherein the second lens unit is arranged on the reduction conjugate side with respect to the first lens unit, and wherein the first lens unit and the second lens unit are configured to move in different trajectories on an optical axis so that curvature of field is adjusted.
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公开(公告)号：US20220229156A1
公开(公告)日：2022-07-21
申请号：US17575216
申请日：2022-01-13
发明人： Masatsugu Nakano , Ryo Iijima , Shin Kuwashiro
IPC分类号： G01S7/481 , G01S17/931
摘要： An optical apparatus includes a deflection unit configured to deflect illumination light from a light source to scan an object and to deflect reflected light from the object, a light guiding unit configured to guide the illumination light from the light source to the deflection unit and to guide the reflected light from the deflection unit to a light receiving element, and an optical system configured to guide the illumination light from the deflection unit to the object and to guide the reflected light from the object to the deflection unit. The optical system includes a front lens unit that consists of lenses located closer to the object than an intermediate image and a rear lens unit that consists of lenses located closer to the deflection unit than the intermediate image. The rear lens unit consists of three or more and five or less positive lenses.
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公开(公告)号：US10955732B2
公开(公告)日：2021-03-23
申请号：US16433827
申请日：2019-06-06
发明人： Ryo Iijima
IPC分类号： G03B21/14 , G02B15/177
摘要： There are provided a first lens unit having negative refractive power, a second lens unit having positive refractive power, a third lens unit having negative refractive power, and fourth, fifth, sixth, and seventh lens units, which are arranged from an enlargement conjugate side toward a reduction conjugate side in this order, the first lens unit includes at least one negative lens and at least one positive lens arranged closer to the reduction conjugate side than the at least one negative lens, the third lens unit is movable from the enlargement conjugate side toward the reduction conjugate side for the zooming, and the refractive index of a lens included in the third lens unit meets a predetermined conditional equation.
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公开(公告)号：US20170153430A1
公开(公告)日：2017-06-01
申请号：US15358585
申请日：2016-11-22
发明人： Ryo Iijima , Makoto Takahashi
IPC分类号： G02B15/177 , G02B27/28 , G02B27/00 , G02B13/16 , G02B1/04
CPC分类号： G02B15/177 , G02B13/16 , G02B13/22 , G02B27/102
摘要： The projection lens includes at least one plastic lens having a negative power and disposed on an enlargement conjugate side further than a reduction conjugate side pupil. The projection lens satisfies 1.4≦ft/fw≦2.5, −0.70≦ft/fPL≦−0.33 and −1.0≦1−(fnot×L×tan(ωt))/ft≦0.2. fPL represents a focal length of a most reduction side plastic lens among the at least one plastic lens, fw represents a focal length of the projection lens at its wide-angle end, ft represents a focal length of the projection lens at its telephoto end, L represents a distance at the telephoto end between an enlargement conjugate side lens surface of the most reduction side plastic lens and the reduction conjugate side pupil on an optical axis of the projection lens, fnot represents an F-number of the projection lens at the telephoto end, and ωt (degree) represents a half field angle of the projection lens at the telephoto end.
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