发明授权
- 专利标题: Laser radar projection with object feature detection and ranging
- 专利标题(中): 激光雷达投影与物体特征检测和测距
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申请号: US12001606申请日: 2007-12-11
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公开(公告)号: US08085388B2公开(公告)日: 2011-12-27
- 发明人: Steven P. Kaufman , Arkady Savikovsky , Christopher C. Chagaris , Joel Stave
- 申请人: Steven P. Kaufman , Arkady Savikovsky , Christopher C. Chagaris , Joel Stave
- 申请人地址: US NH Londonderry
- 专利权人: Laser Projection Technologies, Inc.
- 当前专利权人: Laser Projection Technologies, Inc.
- 当前专利权人地址: US NH Londonderry
- 代理机构: Finch & Maloney PLLC
- 主分类号: G01C3/08
- IPC分类号: G01C3/08
摘要:
A 3D pulsed laser projection system scans an object to produce a dense 3D point cloud and projects a laser light beam onto an object as a glowing template. A high-sensitivity optical feedback system receives and detects a feedback beam of the output beam light diffusely reflected from the object. The feedback light and projected beam share the same beam path between steering mirrors and the object. A light suppression component controls stray scattered light, including ambient light, from being detected. A time-of-flight measurement subsystem provides a distance-to-object measurement for projected pulses. An acousto-optical modulator, variable gain detected signal amplification and variable photo-detector power together produce a dynamic range for detected reflected feedback signals of at least 100,000, and up to 500,000. Optical fiber cables spatially filter scattered light and isolate the photo-detectors thermally. The laser is preferably pulsed at least 50 kHz, with sampling of the projected and feedback reflected optical pulse signals at a sampling rate of up to 10 gigasamples per second.
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