Composite beam coarse and fine coupling scanning device

Abstract

The invention relates to a composite type beam coarse and fine coupling scanning device which comprises a base, a spring, a middle lens frame, an inner lens frame, a wedge prism, a large bearing end cover, a rotary encoder rotor, a rotary encoder stator, an outer lens frame, a large bearing retainer ring, a large bearing, a nylon pad, a wedge retainer ring, a threaded pressing ring, a prism tightening screw, a torque motor stator, a torque motor rotor, a voice coil motor rotor, a push rod, a voice coil motor stator, a push groove, a third nylon pad, a small bearing, a small bearing end cover, a half shaft, and a small rotary encoder assembly. Through the rotation of the wedge prism, the beam large range coarse scanning is realized, through the deflection of the wedge prism, the beam local range high precision scanning is realized. One set of the device or multiple sets of the devices can be used together, the scanning range of the beam can be increased further when the multiple sets of the devices are used, the rich scanning styles are realized, and the device has extensive prospect in the application fields with high requirements of a beam scanning range and precision such as photoelectric imaging detection, free space laser communication, and dynamic target laser tracking.

Description

technical field [0001] The invention relates to an optical scanning device, in particular to a composite beam coarse-fine coupling scanning device, which can be used for high-precision beam scanning, tracking and alignment in the field of precision engineering, and belongs to the field of precision optical scanning. Background technique [0002] Precision optical scanning device is one of the key technologies in the fields of photoelectric imaging detection, free space laser communication, and dynamic target laser tracking. The optical scanning device with the refractive wedge prism as the core optical element has the advantages of compact structure, small moment of inertia, good dynamic performance, etc., and has a wide range of applications in the above-mentioned fields. There are two types of common wedge prism optical scanning devices: rotating double prism scanning device and tilting double prism scanning device. The rotating double prism scanning device uses a pair of...

AI Technical Summary

Problems solved by technology

This mechanism converts the small-angle swing of the prism into a large-distance movement of the slider, which reduces the requirements for control accuracy, but the transmission process is relatively complicated, and it is not suitable for applications such as real-time tracking.

[0013] The common disadvantage of the above rotating double prism scanning devices is that the circumferential scanning accuracy is greatly affected by the precision of the mechanical structure, and the common disadvantage of the above swinging double prism scanning devices is that the scanning field of view is small

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