Title:
Line-Scanning Three-Dimensional Sensing System
Document Type and Number:
WIPO Patent Application WO/2024/031758
Kind Code:
A1
Abstract:
A line-scanning three-dimensional sensing system measures a surface profile of an object. In the system, a dispersion optical module (DOM) (110) performs a forward optical process of chromatically dispersing a polychromatic linear light beam (131) into constituent narrowband linear light beams (CNLLBs) (180) and focusing the CNLLBs (180) on different focal planes (183a-c) to form a rainbow light pattern (181) for illuminating a scanned surface (283) of the object (95). The illuminated object (95) displays an information-bearing color image (IBCI) (282) containing height information of the scanned surface (283). The DOM (110) captures the IBCI (282), and performs a backward optical process of optically condensing the captured IBCI (282) to form an elongated light pattern (210). The backward optical process is an inverse of the forward one. A slit (122) spatially filters the elongated light pattern (210) to form an output light line (220). A height profile of the scanned surface is obtained by analyzing a spectral content at each point of the output light line (220).
Inventors:
JIANG JINBO (CN)
XIE STEAPHAN SI FAN (CN)
CHI YONG (CN)
XIE STEAPHAN SI FAN (CN)
CHI YONG (CN)
Application Number:
PCT/CN2022/116027
Publication Date:
February 15, 2024
Filing Date:
August 31, 2022
Export Citation:
Assignee:
HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD (CN)
International Classes:
G01B11/25
Domestic Patent References:
| WO2013064395A1 | 2013-05-10 |
Foreign References:
| CN112648926A | 2021-04-13 | |||
| CN113465547A | 2021-10-01 | |||
| CN111220090A | 2020-06-02 | |||
| CN115060363A | 2022-09-16 | |||
| CN108344695A | 2018-07-31 | |||
| US5675407A | 1997-10-07 |
Attorney, Agent or Firm:
SHANGHAI SAVVY INTELLECTUAL PROPERTY AGENCY (CN)
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