Research on beam splitting prism in laser heterodyne interferometer

Xiu-hua Fu; Shi-fu Xiong; Yang Kou; Yong-gang Pan; Heng Chen; Zeng-yu Li; Chuan-xin Zhang

doi:10.1117/12.2068856

6 August 2014 Research on beam splitting prism in laser heterodyne interferometer

Xiu-hua Fu, Shi-fu Xiong, Yang Kou, Yong-gang Pan, Heng Chen, Zeng-yu Li, Chuan-xin Zhang

Proceedings Volume 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 92812D (2014) https://doi.org/10.1117/12.2068856
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

With the rapid development of optical testing technology, laser heterodyne interferometer has been used more and more widely. As the testing precision requirements continue to increase, the technical prism is an important component of heterodyne interference. The research utilizing thin film technology to improve optical performance of interferometer has been a new focus. In the article, based on the use requirements of interferometer beam splitting prism, select Ta₂O₅ and SiO₂ as high and low refractive index materials respectively, deposit on substrate K9. With the help of TFCalc design software and Needle method, adopting electron gun evaporation and ion assisted deposition, the beam splitting prism is prepared successfully and the ratio of transmittance and reflectance for this beam splitting prism in 500~850 nm band, incident angle 45 degree is 8:2. After repeated tests, solved the difference problem of film deposition process parameters ,controlled thickness monitoring precision effectively and finally prepared the ideal beam splitting prism which is high adhesion and stable optics properties. The film the laser induced damage threshold and it meet the requirements of heterodyne interferometer for use.

Citation Download Citation

Xiu-hua Fu, Shi-fu Xiong, Yang Kou, Yong-gang Pan, Heng Chen, Zeng-yu Li, and Chuan-xin Zhang "Research on beam splitting prism in laser heterodyne interferometer", Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92812D (6 August 2014); https://doi.org/10.1117/12.2068856

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KEYWORDS

Beam splitters

Prisms

Laser induced damage

Interferometers

Refractive index

Laser damage threshold

Heterodyning

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