Photochemical adhesion of fused silica glass for UV transmittance

Masataka M. Murahara; Takayuki Funatsu; Yoshiaki Okamoto

doi:10.1117/12.588385

21 February 2005 Photochemical adhesion of fused silica glass for UV transmittance

Masataka M. Murahara, Takayuki Funatsu, Yoshiaki Okamoto

Proceedings Volume 5647, Laser-Induced Damage in Optical Materials: 2004; (2005) https://doi.org/10.1117/12.588385
Event: Boulder Damage Symposium XXXVI, 2004, Boulder, Colorado, United States

Abstract

The new, strong adhesion method has been developed for optical materials to transmit vacuum ultraviolet rays by using silicone oil. Silicone oil (dimethyl siloxane) has the main chain of siloxane bonds like quartz and the side chains of methyl group. By irradiating ultraviolet rays in oxygen atmosphere, the organic silicone oil was photo-oxidized and changed into inorganic glass. The silicone oil was poured into the thin gap between two pieces of silica glass in oxygen atmosphere and irradiated with the Xe₂ excimer lamp. Consequently, the siloxane of the silicone oil was bonded with the O atoms that had been absorbed on the glass surface to form SiO₂. The UV transmittance of the silicone oil was improved by 62%, from 30% before the lamp irradiation to 92% after the 60-minute irradiation. Furthermore, the adhesive strength of the silicone oil was enhanced from 0 kgf/cm² before the irradiation to 180 kgf/cm² after the irradiation. The honeycomb structure board and plane mirrors were adhered with the Xe₂ excimer lamplight and photo-oxidized silicone oil.

Citation Download Citation

Masataka M. Murahara, Takayuki Funatsu, and Yoshiaki Okamoto "Photochemical adhesion of fused silica glass for UV transmittance", Proc. SPIE 5647, Laser-Induced Damage in Optical Materials: 2004, (21 February 2005); https://doi.org/10.1117/12.588385

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