Lissajous optical fiber scanner with double driving parts

By designing a dual-drive Lissajous fiber optic scanner and utilizing a combination of cylindrical and sheet-shaped piezoelectric actuators, the vibration coupling problem of the Lissajous scanner was solved, achieving uniform scanning effect and high yield, while reducing processing difficulty and precision requirements.

CN224096079UActive Publication Date: 2026-04-07CHENGDU IDEALSEE TECH
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Patent Information

Application Number
CN202521104088.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2026-04-07
Estimated Expiration
2034-12-30

AI Technical Summary

Technical Problem

When existing Lissajous scanners utilize natural frequencies close to each other in two directions, vibration coupling effects are easily generated, leading to scanning trajectory distortion and making it difficult to guarantee processing accuracy and yield.

Method used

Design a dual-drive Lissajous fiber optic scanner. By combining a cylindrical piezoelectric actuator and a sheet piezoelectric actuator, the natural frequency difference in the two directions is ensured to be appropriate, vibration coupling is avoided, and the manufacturing difficulty and accuracy requirements are reduced.

Benefits of technology

It achieves uniformity and density in scanning results, improves processing efficiency and yield, avoids vibration coupling, and reduces processing difficulty and precision requirements.

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Abstract

The utility model discloses a dual-driving-part Lissajous optical fiber scanner, which comprises a cylindrical piezoelectric actuating part, a sheet-shaped piezoelectric actuating part and an optical fiber, and is characterized in that at least one of the left side and the right side of a piezoelectric material cylindrical body is provided with a correspondingly matched electrode, and the front end of the piezoelectric material cylindrical body is driven to vibrate left and right along the horizontal direction; the left side wall and the right side wall of the piezoelectric material barrel-shaped body are both provided with installation grooves used for being connected with the sheet-shaped piezoelectric actuating parts. The sheet-shaped piezoelectric actuating parts and the overlapping parts enable the inherent frequency of a combined part composed of the piezoelectric material barrel-shaped body, the sheet-shaped piezoelectric actuating parts and the optical fibers in the horizontal direction to be larger than the same-order inherent frequency in the vertical direction. According to the invention, the vibration frequencies of the combined part in two directions meet the requirements of Lissajous scanning working conditions by adjusting the appearance structure and / or size parameters of the sheet-shaped piezoelectric actuating part, the requirements of the processing size and precision of the cylindrical body are reduced, the processing difficulty of the cylindrical body is low, the processing error is easy to control, and the yield is high.
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