Author:
Pan Shuixin,Cui Jinlin,Zhang Yueqiang,Hu Biao,Liu Xiaolin,Yu Qifeng
Abstract
Light detection and ranging (LiDAR) systems have made significant
contributions in different applications. The laser ranging (LR) system
is one of the core components of LiDARs. However, existing coaxial LR
systems suffer from low energy efficiency due to obstruction of the
reflection mirror. In this study, we carefully design a laser
transmitter and receiver subsystem and consequently propose a highly
energy-efficient coaxial design for a time of light-based LR system,
where a perforated mirror and splicing lens account for the promotion
of energy efficiency. The small hole in the perforated mirror is
located on the object focus of the focusing lens to ensure the laser
beam will pass through the perforated mirror without obstructions. The
ring-shape splicing lens, consisting of two parts, is used for laser
collimation and laser reception simultaneously. Laboratory experiments
proved that the proposed design eliminates the complex calibration
process for noncoaxial LR systems while reaching a comparable energy
efficiency, which is higher than 98%. We believe it is an economical
yet efficient way to promote the energy efficiency of coaxial LR
systems.
Funder
National Natural Science Foundation of
China