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公开(公告)号：US20230244085A1
公开(公告)日：2023-08-03
申请号：US18004106
申请日：2021-07-05
发明人： Muyun WANG , Dongliang ZHANG
CPC分类号： G02B27/4266 , G02B27/0012
摘要： A periodic optimization method for a diffractive optical element includes converting coordinates of individual target spots of a target spot array into angular spectrum coordinates, selecting an initial period, calculating diffraction orders of individual target spots, rounding the diffraction order, calculating the coordinates of actual projection spots by using the rounded diffraction orders, calculating evaluation indicator of period optimization, adjusting the period, and repeating the steps, and comparing the evaluation indicators to determine an optimal period for the diffractive optical element. With the periodic optimization method, an actual spot array is made to match a target spot array to the greatest possible extent with a small amount of calculations, thereby improving the design quality and accuracy of a diffractive optical element.
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公开(公告)号：US20220357586A1
公开(公告)日：2022-11-10
申请号：US17763474
申请日：2020-09-21
发明人： Yiyan WANG , Xiaodong YIN
IPC分类号： G02B27/42
摘要： A design method of a diffractive optical assembly, and a diffractive optical assembly. The design method comprises: S110, designing a first diffractive optical element according to a target light field; S120, simulating the first diffractive optical element to obtain a first light field difference between the simulation light field of the first diffractive optical element and the target light field; and S130, designing a second diffractive optical element according to the first light field difference. According to the design method, the performance of the diffractive optical assembly can be improved.
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公开(公告)号：US11774238B2
公开(公告)日：2023-10-03
申请号：US17426540
申请日：2020-01-10
发明人： Xiaodong Yin , Kehan Tian , Lixin Wei
CPC分类号： G01B11/2513 , G01B11/026 , G02B27/4205
摘要： A light projection method with safety protection and a light projection device with safety projection. The light projection method (200) comprises: turning on a light source at a safe power level (S201); using a diffractive optical element to modulate light emitted from the light source so as to project a pattern onto a target surface (S202); acquiring the pattern (S203); determining whether the pattern is normal (S204); and if so, turning on the light source at a rated power level, wherein the rated power level is higher than the safe power level (S205). The invention enables an optical system to have a smaller size while ensuring safety of a user, simplifies a structure, reduces costs, and facilitates efficient utilization of optical energy.
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公开(公告)号：US20220090914A1
公开(公告)日：2022-03-24
申请号：US17426540
申请日：2020-01-10
发明人： Xiaodong YIN , Kehan TIAN , Lixin WEI
摘要： A light projection method with safety protection and a light projection device with safety projection. The light projection method (200) comprises: turning on a light source at a safe power level (S201); using a diffractive optical element to modulate light emitted from the light source so as to project a pattern onto a target surface (S202); acquiring the pattern (S203); determining whether the pattern is normal (S204); and if so, turning on the light source at a rated power level, wherein the rated power level is higher than the safe power level (S205). The invention enables an optical system to have a smaller size while ensuring safety of a user, simplifies a structure, reduces costs, and facilitates efficient utilization of optical energy.
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公开(公告)号：US20220075200A1
公开(公告)日：2022-03-10
申请号：US17431060
申请日：2020-01-10
发明人： Qun LUO , Xingpeng YANG , Ming YUAN
摘要： A beam-splitting optical module (100), comprising: a light-emitting device (101); and a diffractive optical element (103), wherein the diffractive optical element (103) is provided in a light exit path of the light-emitting device (101), and is configured to modulate incident light to project at least two groups of light beams, and can form, on a target surface (105), at least two groups of light spots, the number of groups of which corresponds to that of the light beams, wherein polarization directions of at least two groups of light beams are different, and/or optical distances from the light-emitting device (101) to the target surface (105) are different.
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公开(公告)号：US11740483B2
公开(公告)日：2023-08-29
申请号：US17763474
申请日：2020-09-21
发明人： Yiyan Wang , Xiaodong Yin
IPC分类号： G02B27/42
CPC分类号： G02B27/4233
摘要： A design method of a diffractive optical assembly, and a diffractive optical assembly are provided. The design method comprises: designing a first diffractive optical element according to a target light field; simulating the first diffractive optical element to obtain a first light field difference between the simulation light field of the first diffractive optical element and the target light field; and designing a second diffractive optical element according to the first light field difference.
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公开(公告)号：US11733536B1
公开(公告)日：2023-08-22
申请号：US18004106
申请日：2021-07-05
发明人： Muyun Wang , Dongliang Zhang
CPC分类号： G02B27/4266 , G02B27/0012
摘要： A periodic optimization method for a diffractive optical element includes converting coordinates of individual target spots of a target spot array into angular spectrum coordinates, selecting an initial period, calculating diffraction orders of individual target spots, rounding the diffraction order, calculating the coordinates of actual projection spots by using the rounded diffraction orders, calculating evaluation indicator of period optimization, adjusting the period, and repeating the steps, and comparing the evaluation indicators to determine an optimal period for the diffractive optical element. With the periodic optimization method, an actual spot array is made to match a target spot array to the greatest possible extent with a small amount of calculations, thereby improving the design quality and accuracy of a diffractive optical element.
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公开(公告)号：US20230092042A1
公开(公告)日：2023-03-23
申请号：US18059040
申请日：2022-11-28
发明人： Muyun WANG , Yuming SONG , Peng CHEN , Xiaodong YIN
摘要： A diffractive optical element (10) comprises a microstructure plane provided thereon with at least one microstructural pattern unit. The diffractive optical element (10) can receive a light beam emitted from a partitioned light source array (20) and project a light field on a target surface (OB), wherein the partitioned light source array (20) comprises a plurality of light source arrays (20-1, 20-2, ..., 20-n) spaced along a first direction, and the microstructural pattern unit is configured to be capable of diverging and light homogenization-modulating a light beam emitted from a light source in the plurality of light source arrays (20-1, 20-2, ..., 20-n) along the first direction such that light field regions projected by adjacent light source arrays (20-1, 20-2, ..., 20-n) on the target surface are adjoined or overlapped with each other in the first direction. In the embodiments of the invention, there are gaps between adjacent partitions. The light source partitions are lightened in turn. When each light source partition is lightened, only a region in the target light field corresponding to the partition is illuminated uniformly. Moreover, when all partitions are lightened together, the whole target light field is illuminated uniformly. There is no dark space caused by gaps between partitions, thereby realizing uniform illumination of partitions in the target light field.
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