Compact laser radar ranging optical system

Abstract

The invention provides a compact laser radar ranging optical system. The compact laser radar ranging optical system is compact in structure and can increase the collimation system focal length and improve the collimation parallelism degree of an output beam, and thus the measured distance can be increased; and the compact laser radar ranging optical system comprises a collecting mirror, a mountinghole is formed in the center of the collecting lens, the mounting hole is provided with a cassegrain collimation system in an embedded mode, the cassegrain collimator system comprises a semiconductordiode emission source, a concave reflecting mirror and a convex reflecting mirror which are coaxially arranged, and an opening is formed in the center of the concave reflecting mirror.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a compact laser radar ranging optical system. Background technique [0002] In modern industrial production, the use of laser as a sensor to measure various parameters has been widely used. The laser beam hits the target object and generates a diffuse reflection signal, and then the detector receives the reflected laser signal to analyze the material structure and measure the shape of the object. Appearance, measuring the position and distance of objects, etc., especially LiDAR ranging, has important applications in various occasions. Among them, there are many types of lidar ranging, and the coaxial ranging method has great potential because of its compact structure. As the preferred light source for compact coaxial ranging systems, semiconductor diode lasers have different divergence angles and Beam quality, but its output power is larger, and the greater the output pow...

AI Technical Summary

Problems solved by technology

Among them, there are many types of lidar ranging, and the coaxial ranging method has great potential because of its compact structure. As the preferred light source for compact coaxial ranging systems, semiconductor diode lasers have different divergence angles and Beam quality, but its output power is larger, and the higher the output power, the worse the beam quality, the worse the collimation effect, the faster the beam divergence, and the lower energy concentration, which leads to the increase of output power is not proportional to the increase of measurement distance, then in order Increasing the collimation of the beam requires lengthening the focal length of the collimation system, but it will increase the length of the collimation system, which is not conducive to reducing the size of the system structure

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