PATTERN PROJECTOR BASED ON VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL) ARRAY
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IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
H01S-005/042
G02B-027/42
H01S-005/42
출원번호
17428000
(2019-03-01)
공개번호
20220123522
(2022-04-21)
국제출원번호
PCT/CN2019/076666
(2019-03-01)
발명자
/ 주소
Wang, Yang
Li, Danyong
출원인 / 주소
Shenzhen Raysees Technology Co., Ltd.
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초록▼
The present invention discloses a pattern projector based on VCSEL array. The VCSEL array has a plurality of VCSELs configured in a regular pattern on a VCSEL chip. A certain number but not all of the VCSELs are selected for two groups. In one operational mode, VCSELs of one group are powered on to
The present invention discloses a pattern projector based on VCSEL array. The VCSEL array has a plurality of VCSELs configured in a regular pattern on a VCSEL chip. A certain number but not all of the VCSELs are selected for two groups. In one operational mode, VCSELs of one group are powered on to form a low-density irregular pattern. A lens system projects an image of the low-density irregular pattern on a diffractive optical element (DOE). The DOE multiplies a replica of the image and generates a matrix of the replicas on a target surface. In another operational mode, VCSELs of the two groups are powered on simultaneously or the second group is powered on alone to form a high-density irregular pattern. An image of the high-density irregular pattern is projected on the DOE. Thus, the pattern projector may provide irregular light patterns for low-resolution and high-resolution 3D sensing.
대표청구항▼
1. A pattern projector, comprising: a plurality of Vertical Cavity Surface Emitting Laser (VCSEL) structures formed on a VCSEL chip, wherein the plurality of VCSEL structures is configured in a predetermined regular pattern;a first metal structure electrically connecting a selected number but not al
1. A pattern projector, comprising: a plurality of Vertical Cavity Surface Emitting Laser (VCSEL) structures formed on a VCSEL chip, wherein the plurality of VCSEL structures is configured in a predetermined regular pattern;a first metal structure electrically connecting a selected number but not all of the VCSEL structures;a second metal structure electrically connecting at least some of the VCSEL structures which are not electrically connected to the first metal structure, wherein the first and second metal structures are electrically insulated from each other;a lens system, wherein the lens system processes laser beams emitted from at least some of the VCSEL structures of the VCSEL chip; anda diffractive optical element (DOE), wherein the DOE receives the laser beams processed by the lens system, generates diffracted beams, and projects the diffracted beams onto a surface of a target. 2. The pattern projector of claim 1 further comprising a first control circuit for driving the VSCEL structures electrically connected by the first metal structure and a second control circuit for driving the VCSEL structures electrically connected by the second metal structure. 3. The pattern projector of claim 2, wherein the VCSEL structures connected by the first metal structure form a first irregular pattern. 4. The pattern projector of claim 3, wherein the VCSEL structures connected by the second metal structure form a second irregular pattern. 5. The pattern projector of claim 3, wherein the VCSEL structures connected by the first metal structure and the VCSEL structures connected by the second metal structure form a second irregular pattern. 6. The pattern projector of claim 1, wherein VCSEL structures which are not electrically connected to the first metal structure or the second metal structure are electrically connected to a third metal structure, the first, second, and third metal structures are electrically insulated from each other. 7. The pattern projector of claim 6 further comprising a first control circuit for driving the VSCEL structures electrically connected by the first metal structure, a second control circuit for driving the VCSEL structures electrically connected by the second metal structure, and a third control circuit for driving the VCSEL structures electrically connected by the third metal structure. 8. The pattern projector of claim 1 further comprising an optical component, wherein the first and second metal structures are deposited on the optical component before the optical component is fixed above the VCSEL structures during a packaging process. 9. The pattern projector of claim 1 further comprising a submount, wherein the first and second metal structures are deposited on the submount before the VCSEL structures are mounted on the submount during a packaging process. 10. The pattern projector of claim 1, wherein the VCSEL structures connected by the first metal structure and the VCSEL structures connected by the second metal structure are interleaved. 11. A pattern projector, comprising: a plurality of Vertical Cavity Surface Emitting Laser (VCSEL) structures formed on a VCSEL chip, wherein the plurality of VCSEL structures are configured in a predetermined regular pattern;a first metal layer electrically connecting a selected number but not all of the VCSEL structures to form a first pattern, wherein the first pattern is an irregular pattern;a second metal layer electrically connecting at least some of the VCSEL structures which are not electrically connected to the first metal layer to form a second pattern, wherein the first and second metal layers are electrically insulated from each other;a lens system, wherein the lens system processes laser beams emitted from VCSEL structures of at least one of the first and second patterns; anda diffractive optical element (DOE), wherein the processed laser beams received from the lens system are diffracted by the DOE. 12. The pattern projector of claim 11 further comprising a plurality of control circuits, wherein the plurality of control circuits drives VSCEL structures of the first and second patterns respectively. 13. The pattern projector of claim 12, wherein at least some of the VCSEL structures which are not in the first and second patterns are electrically connected to a third metal layer to form a third pattern, the first, second, and third metal layers are electrically insulated from each other. 14. The pattern projector of claim 12, wherein combination of the first and second patterns is an irregular pattern. 15. The pattern projector of claim 12, wherein the second pattern is irregular. 16. The pattern projector of claim 12, wherein the DOE generates a plurality of prearranged patterns on a surface of a target, and wherein the prearranged patterns correspond to at least one of the first and second patterns. 17. The pattern projector of claim 12 further comprising an optical component, wherein the first and second metal layers are deposited on the optical component before the optical component is fixed above the VCSEL structures during a packaging process. 18. The pattern projector of claim 12 further comprising a submount, wherein the first and second metal layers are deposited on the submount before the VCSEL structures are mounted on the submount during a packaging process.
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