Single-point diamond turning of DAST crystals

Yoshiharu Namba; Masahiro Tsukahara; Atsuya Fushiki; Koji Suizu; Hiromasa Ito

doi:10.1117/12.510445

Translator Disclaimer

22 December 2003 Single-point diamond turning of DAST crystals

Yoshiharu Namba, Masahiro Tsukahara, Atsuya Fushiki, Koji Suizu, Hiromasa Ito

Author Affiliations +

Proceedings Volume 5180, Optical Manufacturing and Testing V; (2003) https://doi.org/10.1117/12.510445
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Organic nonlinear optical crystal 4-dimethylamino-N-metyl-4-stilbazolium tosylate (DAST) can be used for new optical devices such as high frequency electro-optical sampling wavelength conversion, submillimeter wave generation, and terahertz-wave generation. The crystal is soft, brittle and hygroscopic so that it is very difficult to get optical surfaces by using conventional optical polishing process. This paper deals with single-point diamond turning for getting optical surfaces on DAST crystals. Three typical planes on DAST crystals were finished by single-point diamond turning. The quality of single-point diamond turned surface depends upon the crystallographic plane, cutting direction, cutting speed, depth of cut, feed rate, rake angle, nose radius of diamond tool, tool clearance angle, tool wear, lubricant and its supplying method. The turned surface was measured with a Nomarski interference microscope, atomic force microscope, and a three-dimensional optical profiler. By optimizing the machining conditions, 0.33 nm rms surface roughness and 8.7 nm p-v flatness in 1 mm square were obtained on a b-plane of DAST crystal.

Citation Download Citation

Yoshiharu Namba, Masahiro Tsukahara, Atsuya Fushiki, Koji Suizu, and Hiromasa Ito "Single-point diamond turning of DAST crystals", Proc. SPIE 5180, Optical Manufacturing and Testing V, (22 December 2003); https://doi.org/10.1117/12.510445

ACCESS THE FULL ARTICLE