Laser radar transmitting unit, laser radar receiving unit and laser radar

Abstract

The invention provides a laser radar transmitting unit. The transmitting unit comprises: a telecentric lens system, wherein the telecentric degree of the telecentric lens system is smaller than or equal to a preset value, and the telecentric degree is defined as the size of an included angle between the image space and the normal of an image plane of chief light of each view field; and a laser array comprising a plurality of lasers located upstream of an optical path of the telecentric lens system, wherein each laser emits laser light incident on the telecentric lens system. The invention also provides a receiving unit and a laser radar comprising the transmitting unit and / or the receiving unit.

Description

technical field [0001] The present invention generally relates to the field of optoelectronic technology, and in particular to a transmitting unit, a receiving unit and a laser radar including a telecentric lens system. Background technique [0002] Laser radar (LiDAR) is a general term for laser active detection sensor equipment. The working principle of laser radar based on TOF (time-of-flight) technology is roughly as follows: the transmitter of laser radar emits a beam of laser light, and the laser beam encounters objects. , after diffuse reflection, returns to the laser receiver, the radar module multiplies the time interval between sending and receiving signals by the speed of light, and then divides by 2 to calculate the distance between the transmitter and the object. [0003] For the solid-state laser radar with area array emission and area array reception, for example, the laser adopts VCSEL laser, the laser light emitting surface is on the same plane, perpendicula...

AI Technical Summary

Problems solved by technology

[0005] The layout of the laser array in the shape of a curved surface requires more complex process control, and the expected cost is relatively high

The existing solid-state lidar does not describe the structure of the optical lens in detail, and ordinary vehicle-mounted camera lenses are often not suitable for lidar applications due to reasons such as small numerical apertures.

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