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1. (WO2018195998) ANGLE CALIBRATION IN LIGHT DETECTION AND RANGING SYSTEM

Pub. No.:    WO/2018/195998    International Application No.:    PCT/CN2017/082603
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: G02B 26/10
G02B 26/08
G01S 7/497
G01S 17/88
Applicants: SZ DJI TECHNOLOGY CO., LTD.
Inventors: WANG, Ke
LONG, Chenghui
HONG, Xiaoping
Title: ANGLE CALIBRATION IN LIGHT DETECTION AND RANGING SYSTEM
Abstract:
A light detection and ranging device and method thereof is provided, the device includes: a light beam emitter (101) operable to emit a light beam; a prism set (151,152) positioned in an optical path of the light beam to refract the light beam onto a surface of a surrounding object (104); a light detector (105) to detect light reflected by the surface of the surrounding object (104); a controller configured to estimate the surface of the surrounding object (104) based on the detected light. The controller is operable to (1) determine a relative bias in the prism set (151,152), and (2) cause, based on the relative bias in the prism set (151,152), a compensation for an estimation error in the controller's estimation of the surface of the surrounding object (104).