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KMID : 1011420220270030193
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Journal of Korean Ophthalmic Optics Society
2022 Volume.27 No. 3 p.193 ~ p.200
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Line-Focusing Optical System for Laser Beams Using Folding Mirrors
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Lee Jeong-Hyeon
Lee Dong-Hee
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Abstract
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Purpose: This study aimed to develop a laser beam line-focusing optical system with improved uniformity of the focusing line beam using a folding mirror in the line-focusing optical system configuration that generates a one-line beam by combining two laser diode (LD) stacks.
Methods: We inserted a folding mirror that can adjust the folding angle between the focusing optical system composed of two LD stacks and the cylinder lenses to adjust the angle of the folding mirror. Hence, we could use the reflection angle of the folding mirror as an optimization variable to improve the uniformity of the focusing line beam according to the working distance.
Results: In the newly designed optical system, the size of the laser beam line-focused by combining beams from the emission areas of the two LD stacks was 1 mm × 40 mm (±10%), and the irradiance uniformity of the focused laser beam line at a working distance of 280±10 mm was within approximately ±15%.
Conclusions: Using a folding mirror, it was possible to design a new laser beam linefocusing optical system that combines two LD stacks to generate a single line beam. This optical system could become a laser beam line-focusing optical system with improved irradiance uniformity within the working distance range compared to the existing optical system using a reverse biprism.
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KEYWORD
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Folding mirror, LD stack, Emitting area, Irradiance uniformity, Line focusing optical system
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