Development of a miniature objective based on calcium fluoride and zinc sulfide lenses for ultrafast laser microsurgery applications

Hamin Jeon; Michal E. Pawlowski; Liam AndrusAdela Ben-YakarTomasz S. Tkaczyk

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Development of a miniature objective based on calcium fluoride and zinc sulfide lenses for ultrafast laser microsurgery applications

机译：Development of a miniature objective based on calcium fluoride and zinc sulfide lenses for ultrafast laser microsurgery applications

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Calcium fluoride and zinc sulfide crystals exhibit broad multispectral transparency and are used for a multitude of optical applications. However, they both belong to a soft brittle crystal category and are mechanically challenging to process. Thus, a fabrication protocol using a single-point diamond turning method was developed, which can yield surfaces with optical quality for these materials. By using a diamond turning tool with low waviness (≤100-nm waviness) and by using feed rates of 1 and 0.2 μm/rev, CaF_2 and ZnS surfaces with surface roughness of 6 and 5 nm were manufactured, respectively. Design and fabrication of a miniature objective with 0.5 NA are also presented, which was developed for the ultrafast laser microsurgery application. The objective consists of CaF_2 and ZnS lenses to withstand the high power from ultra-short laser pulses and to provide a tightly focused beam with 1.23 μm 1/e~2 spot radius for laser ablation. Based on the spot size measurement of the objective, its performance was considered to be near diffraction limited.

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来源
《Optical Engineering》 |2021年第7期|075106-1-075106-15|共15页
作者
Hamin Jeon; Michal E. Pawlowski; Liam AndrusAdela Ben-YakarTomasz S. Tkaczyk;
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作者单位

Rice University, Department of Bioengineering, Tkaczyk Group, Houston, Texas, United States;

The University of Texas at Austin, Department of Mechanical Engineering, Ben-Yakar Group, Austin, Texas, United States;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
关键词
optics; optical fabrication; single-point diamond turning; crystal lens; ultrafast lasers;

Development of a miniature objective based on calcium fluoride and zinc sulfide lenses for ultrafast laser microsurgery applications

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