Ultra-precision bonding for cryogenic fused-silica optics

被引:38
作者
Gwo, DH [1 ]
机构
[1] Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA
来源
CRYOGENIC OPTICAL SYSTEMS AND INSTRUMENTS VIII | 1998年 / 3435卷
关键词
bonding; cryogenic; fused silica; hydroxide; optical contacting; optical materials;
D O I
10.1117/12.323731
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
This paper describes the state-of-the-art precision bonding technique for cryogenic fused-silica optics. It was developed for assembling the fused-quartz Gravity Probe-B science instrument, which will be used to prove or disprove Einstein's Theory of General Relativity with unprecedented accuracy and precision. This room-temperature bonding process is based on hydroxide catalysis. The resulting bonding strength is comparable with that of fused silica or fused quartz. The interface is typically 200 nm essentially Limited by surface figure mismatch. It is as precise as optical contacting, as reliable as high-temperature frit bonding, as transparent as optical epoxies. So far it is the only bonding approach that meets all the stringent requirements for GP-B's applications at 2.5 Kelvin.
引用
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页码:136 / 142
页数:7
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