BaF2 crystal machining

Yulan Zhang; Jiandong Yang; Jinliang Feng; Yongliang Li

doi:10.1117/12.318304

5 August 1998 BaF₂ crystal machining

Yulan Zhang, Jiandong Yang, Jinliang Feng, Yongliang Li

Proceedings Volume 3557, Current Developments in Optical Elements and Manufacturing; (1998) https://doi.org/10.1117/12.318304
Event: Photonics China '98, 1998, Beijing, China

Abstract

This paper introduces the properties of BaF₂ crystal material. According to these properties material selecting is discussed including initial separation and finish separation, e.g. checking crystal lithogenesis, intercalation, cloud, uniformity and stress and so on. Determine methods are given also. The BaF₂ machining technology is studied. Comparing different cutting methods we select the cutting method with steel saw blade. For the soft and brittle properties of BaF₂, we probe the rough lapping finish lapping and polishing and for different procedure give selecting principle for abrasive, spindle rotating speed, machining allowance, size tolerance, and iris and relative data. Through machining experiments we find that the workpieces machined adopting the technology proposed in this paper can meet the drawing requirement e.g. N equals 1, (Delta) N equals 0.1, center thickness d equals 4 +/- 0.10 surface roughness Ra 0.008 micrometers (P equals III). The paper also points out some problems should be attended to in machining BaF₂ crystal.

Citation Download Citation

Yulan Zhang, Jiandong Yang, Jinliang Feng, and Yongliang Li "BaF₂ crystal machining", Proc. SPIE 3557, Current Developments in Optical Elements and Manufacturing, (5 August 1998); https://doi.org/10.1117/12.318304

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