Laser scanning mechanism based on lens refraction

Abstract

Provided is a laser scanning mechanism based on lens refraction. The laser scanning mechanism comprises a light source, a refraction lens and a mobile assembly, the mobile assembly comprises a fixed voice coil motor stator and a movable voice coil motor rotor arranged on the voice coil motor stator, and the refraction lens is fixed on the voice coil motor rotor to move with the voice coil motor rotor. Compared with the prior art, the beneficial effects of the laser scanning mechanism based on lens refraction are that through the setting and operation of a voice coil motor, rapid and reciprocating movement of the refraction lens is realized, rapid, high-frequency and continuous scanning of laser beams is realized, the structure is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of laser scanning equipment, and in particular relates to a laser scanning mechanism based on lens refraction. Background technique [0002] A laser scanner is an instrument that uses scanning technology to measure the size and shape of a workpiece. In the prior art, there is a rotating motor with good stability and precision in the laser scanner. When the laser source hits the beam to the The multi-faceted prism driven by the rotating motor is reflected to form a scanning beam. Since the multi-faceted prism is located on the front focal plane of the scanning lens, the rotation of the multi-faceted prism changes the incident angle of the scanning beam relatively continuously, so the reflection angle is also continuous. Change, through the action of the scanning lens, a parallel and continuous scanning line from top to bottom or from left to right is formed. [0003] It can be seen from the above that the current gene...

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Problems solved by technology

[0003] It can be seen from the above that the current general-purpose laser scanning mainly uses the motor-driven laser transmitter to do the back-and-forth deflection action or uses the motor-driven reflector mirror to swing back and forth to realize the back-and-forth first scanning action of the laser; the light scans back and forth through the deflection mirror, which requires very precision. the rotating mechanism

At the same time, the reflective area of ​​the lens is very small, and it is difficult to improve the accuracy when converting back to the deflection angle. At the same time, the mechanical deflection mechanism is limited by the maximum speed limit of the motor, so it is difficult to achieve high-speed scanning. If the double-speed mechanism is used, the control error will inevitably increase, and the ultra-high-speed motor is used. or the drive system would add significantly to the overall cost

[0004] Therefore, the current laser scanning mechanism mainly has problems such as slow scanning speed, complex mechanical structure processing, high assembly precision requirements, poor control precision, high cost, and difficulty in realizing multi-dimensional scanning; With the rapid development of the market, there is an urgent demand for a high-speed, low-cost, and simple laser scanning mechanism

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