产生环形激光的光学系统设计

陈宝华; 吴泉英; 唐运海; 范君柳; 陈晓翌; 余浩墨; 孙毅

doi:10.37188/CO.2023-0045

Volume 16 Issue 6

Nov. 2023

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Article Contents

Chinese Optics > 2023 > 16(6): 1365-1375.

CHEN Bao-hua, WU Quan-ying, TANG Yun-hai, FAN Jun-liu, CHEN Xiao-yi, YU Hao-mo, SUN Yi. Design of an optical system for generating ring-shaped laser beam[J]. Chinese Optics, 2023, 16(6): 1365-1375. doi: 10.37188/CO.2023-0045

Citation:

CHEN Bao-hua, WU Quan-ying, TANG Yun-hai, FAN Jun-liu, CHEN Xiao-yi, YU Hao-mo, SUN Yi. Design of an optical system for generating ring-shaped laser beam[J]. Chinese Optics, 2023, 16(6): 1365-1375. doi: 10.37188/CO.2023-0045

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Design of an optical system for generating ring-shaped laser beam

doi: 10.37188/CO.2023-0045

1.
Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China
2.
Suzhou Mason Optical Co. Ltd., Suzhou 215127, China
3.
Graduate Practice Station in Soochow Mason Optics Co. Ltd., Suzhou 215127, China

Funds: Supported by National Natural Science Foundation of China (No. 62275187, No. 61875145, No. 11804243); The Jiangsu Key Disciplines of the Fourteenth Five-Year Plan (No. 2021135); Suzhou Industrial Outlook and Key Core Technology Project (No. SYC2022145); Suzhou Key Laboratory (No. SZS201202)

More Information

Corresponding author: wqycyh@mail.usts.edu.cn
Received Date: 20 Mar 2023
Rev Recd Date: 19 Apr 2023

Available Online: 12 Jul 2023

Abstract

Abstract

We present a method for designing a transmissive-reflective combined optical system to generate a focused ring-shaped laser beam. The design aims to achieve a freely adjustable radius for the focused ring-shaped laser beam and ensure uniform beam intensity even after defocusing. Based on the principle of equal energy splitting, the transmissive system establishes mapping functions for the input and output light projection height. It optimizes the lens parameters to shape the incident Gaussian light into a flat-topped circular shape, thus achieving uniformity of beam intensity. On the other hand, the reflective system uses the adjustable diameter range of the focal plane ring-shaped light and working distance parameters. By applying the principle of geometric ray tracing, it calculates the parameters of the conical reflecting mirror, parabolic cylindrical mirror, and dynamic mirror, then the flat-topped circular light is transformed into a ring-shaped light. The experimental results show that when the half-apex angle of the dynamic mirror is 16°, the designed system can achieve a freely adjustable radius for the focused ring-shaped laser beam from 15 mm to 30 mm with a size error not more than 0.05 mm, and the intensity uniformity after defocusing reaches 84%. The design method can achieve both uniformity of intensity and freedom of size adjustment without replacing the system lens. It has good operability and yields higher precision and efficiency in the processing of ring-shaped light.
- optical system,
- ring-shaped laser,
- radius control,
- defocus uniformity

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References(22)

References

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