Title:
PATTERN PROJECTOR BASED ON VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL) ARRAY
Document Type and Number:
WIPO Patent Application WO/2020/177007
Kind Code:
A1
Abstract:
A pattern projector (1100) based on VCSEL array (1201). The VCSEL array (1201) has a plurality of VCSELs configured in a regular pattern on a VCSEL chip (1101). 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 (1102) projects an image of the low-density irregular pattern on a diffractive optical element (DOE) (1103). The DOE (1103) 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 (1103). Thus, the pattern projector (1100) may provide irregular light patterns for low-resolution and high-resolution 3D sensing.
Inventors:
WANG YANG (CN)
LI DANYONG (CN)
LI DANYONG (CN)
Application Number:
PCT/CN2019/076666
Publication Date:
September 10, 2020
Filing Date:
March 01, 2019
Export Citation:
Assignee:
SHENZHEN RAYSEES TECH CO LTD (CN)
International Classes:
G02B27/42
Foreign References:
| CN208368943U | 2019-01-11 | |||
| CN109270699A | 2019-01-25 | |||
| CN106997603A | 2017-08-01 | |||
| CN205002744U | 2016-01-27 | |||
| CN106662433A | 2017-05-10 | |||
| US20120293625A1 | 2012-11-22 |
Attorney, Agent or Firm:
SHENZHEN STANDARD PATENT & TRADEMARK AGENT LTD. (CN)
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