Blind zone-suppressed hybrid beam steering for solid-state Lidar
Chao Li, Xianyi Cao, Kan Wu, Gaofeng Qiu, Minglu Cai, Guangjin Zhang, Xinwan Li, Jianping Chen
Abstract
We demonstrate a blind zone-suppressed and flash-emitting solid-state Lidar based on lens-assisted beam-steering technology. As a proof-of-concept demonstration, with the design of a subwavelength-gap 1D long-emitter array and multiwavelength flash beam emitting, the device was measured to have 5% blind zone suppression, 0.06°/point-deflection step, and 4.2 μs scanning speed. In time-of-flight ranging experiments, Lidar systems have a field of view of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"><mml:mrow><mml:mn>11.3</mml:mn><mml:mo>°</mml:mo><mml:mo>×</mml:mo><mml:mn>8.1</mml:mn><mml:mo>°</mml:mo></mml:mrow></mml:math> (normal device) or <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m2"><mml:mrow><mml:mn>0.9</mml:mn><mml:mo>°</mml:mo><mml:mo>×</mml:mo><mml:mn>8.1</mml:mn><mml:mo>°</mml:mo></mml:mrow></mml:math> (blind-zone suppressed device), far-field number of resolved points of 192, and a detection distance of 10 m. This work demonstrates the possibility that a new integrated beam-steering technology can be implemented in a Lidar without sacrificing other performance.