A front heated optical window of lidar

Abstract

The invention discloses a front heating optical window of laser radar, which comprises an optical substrate, at least one of the two surfaces of the optical substrate is provided with a transparent conductive film, the side of the optical substrate is provided with a frame, and the optical substrate is fixed on the frame Above, the frame is provided with an electrode corresponding to the transparent conductive film, and the electrode is attached to the transparent conductive film. A sealing device is provided between the optical substrate and the frame to isolate the inside of the frame from the outside world. The advantage is that by adding a frame around the optical window , redesigning the heating circuit and lead-out method greatly simplifies the circuit connection from both ends of the transparent conductive film to the heating and control system, making it possible to heat the laser radar optical window toward the outside of the laser radar device, thus solving the existing problem The two biggest problems in the technology are low heating efficiency, slow deicing speed and large internal heat radiation.

Description

technical field [0001] The invention relates to an optical window of a laser radar, in particular to a front heating optical window of a laser radar. Background technique [0002] Solid-state lidar refers to the use of semiconductor "micro-motion" devices (such as MEMS scanning mirrors) to replace macroscopic mechanical scanners, and realize laser scanning at the radar transmitter on a microscopic scale. MEMS scanning mirror is a silicon-based semiconductor component, which is a solid-state electronic component. It integrates a "movable" micro-mirror inside, which has both "solid-state" and "motion" properties. For lidar, MEMS is the largest The value lies in: Originally, in order to realize the scanning of the mechanical lidar, the laser transmitter must be rotated. The MEMS micro-electromechanical system can directly integrate a very compact micro-vibration mirror on a silicon-based chip, and the rotatable micro-vibration mirror reflects the light of the laser to realize ...

AI Technical Summary

Problems solved by technology

When the heating surface of the traditional solution faces inward, a large amount of heat will be transferred to the interior of the lidar through radiation during the process of ice melting and defrosting, which will cause temperature changes in the internal photoelectric components, thereby affecting the detection performance of the lidar

Of course, temperature control or temperature compensation can be performed by adding active temperature control devices, but the complexity of the system will increase accordingly, resulting in increased cost and volume

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