High thermal expansion optical component machined by ion beam figuring

Ion beam figuring (IBF) Technology to fabricate optical materials with a high thermal expansion coefficient, such as BK7, we were aware that the thermal effect is a troublesome problem that generates high thermal stress. If the thermal stress is over the component mechanical stress limit, the compon...

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Bibliographic Details
Published in:Optical Engineering 2012-02, Vol.51 (1), p.013401-013401
Main Authors: Xie, Xuhui, Hao, Yu, Zhou, Lin, Dai, Yifan, Li, Shengyi
Format: Article
Language:English
Subjects:
high thermal expansion optics
ion beam figuring
thermal stress control
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Summary:Ion beam figuring (IBF) Technology to fabricate optical materials with a high thermal expansion coefficient, such as BK7, we were aware that the thermal effect is a troublesome problem that generates high thermal stress. If the thermal stress is over the component mechanical stress limit, the component may crack or break. We discuss this problem in detail and set up a thermal model. Using this model, we gain the machined component temperature field and its corresponding thermal stress field. A filtered IBF method is created to correct the thermal stress field which that gain a more even thermal stress distribution and decrease the thermal stress about 20%.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.51.1.013401