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6 February 2012 High thermal expansion optical component machined by ion beam figuring
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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%.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2012/$25.00 © 2012 SPIE
Xuhui Xie, Yu Hao, Lin Zhou, Yifan Dai, and Shengyi Li "High thermal expansion optical component machined by ion beam figuring," Optical Engineering 51(1), 013401 (6 February 2012).
Published: 6 February 2012


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