High-precision optical correction assembly method for scanning mirror

By using optical path calibration and shrinkage compensation mechanisms, the problems of insufficient precision, low efficiency, and high cost in the assembly of the scanning mirror and the motor shaft have been solved, achieving high-precision and low-cost axial assembly of the scanning mirror and the motor, and improving assembly efficiency and yield.

CN122151310APending Publication Date: 2026-06-05HANGZHOU DIANZI UNIVERSTIY INFORMATION ENG SCHOOL
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Patent Information

Application Number
CN202610614343.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-07
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the existing technology, the assembly of the scanning mirror and the motor shaft has problems such as difficulty in quantifying and controlling the precision, no compensation for UV adhesive curing shrinkage, low assembly efficiency and high cost of special equipment, which cannot meet the production requirements of high precision, high efficiency and low cost of lidar.

Method used

Employing a point laser, scanning mirror adjustment module, photopolymerization device, reflector array, and scale receiving plate, the system achieves high-precision, quantitative, and high-efficiency assembly of the scanning mirror and motor axis through optical path calibration and adhesive shrinkage compensation mechanisms. Preset offset compensation is performed using spot offset quantification control and adhesive shrinkage database.

Benefits of technology

It achieves high-precision assembly of the scanning mirror and the motor axis, improving assembly accuracy and yield, reducing equipment investment costs, and is suitable for the production needs of small and medium-sized enterprises and research institutions.

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Abstract

The invention relates to a high-precision optical correction assembly method for a scanning mirror, belongs to the technical field of laser radar manufacturing equipment, and solves the technical problems of insufficient precision, uncompensated glue shrinkage, low efficiency and high cost of special equipment in the assembly of the existing scanning mirror. According to the method, based on the light reflection principle, the included angle between a scanning mirror and the axial direction of a motor is represented through light path amplification offset, an optical calibration system is constructed through point laser, a reflector group and a scale receiving plate, coarse adjustment and fine adjustment are completed in cooperation with a scanning mirror adjusting jig, and after the motor rotates by 180 degrees, the positions of laser spots on the scale receiving plate coincide; and then UV glue curing is completed through a light curing device, and high-precision assembly is achieved in combination with a glue shrinkage compensation mechanism and a quantitative verification standard. According to the invention, the high-precision assembly of the scanning mirror and the motor shaft is realized in combination with quantitative adjustment, verification standards and a glue shrinkage compensation mechanism through an optical calibration mode of light path amplification offset, a glue shrinkage preset offset compensation scheme is established, and the problem of angular deviation of UV glue curing shrinkage is avoided.
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