28 October 2016 Hot isostatic atmospheric pressure casting H-K9L lightweight mirror
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Proceedings Volume 9683, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 96832E (2016) https://doi.org/10.1117/12.2243602
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China
Abstract
Glass lightweight mirror can be made by Hot Isostatic Atmospheric Pressure (HIAP) casting method which melting small glass chunks into a mold that made lots of hexagon-shaped pockets in the back of the mirror. Alumina-silica refractory cores which used to form honeycomb mold can withstand over 950 degree Celsius temperature. Furnace temperature rises to 950 degree Celsius after H4 H-K9L chunks loaded into mold, holds this temperature over 2 hours and then drops to room temperature slowly. HIAP casting lightweight blank can used to form 1/60 λ RMS (λ=0.6328μm) mirror and this method can use to made big diameter lightweight blank.
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Jianfeng Ren, Jianfeng Ren, Yi Wang, Yi Wang, Gufeng Qiu, Gufeng Qiu, Yin Ni, Yin Ni, QiTai Huang, QiTai Huang, Gang Wang, Gang Wang, Xiaojun Tang, Xiaojun Tang, } "Hot isostatic atmospheric pressure casting H-K9L lightweight mirror", Proc. SPIE 9683, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 96832E (28 October 2016); doi: 10.1117/12.2243602; https://doi.org/10.1117/12.2243602
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