In Situ Measurement and Compensation Turning Technique of Deep MgF2 Conformal Dome

Deng Chao Zhu; Yi Fan Dai; Chao Liang Guan; Gui Lin Wang; Gui Peng Tie

doi:10.4028/www.scientific.net/AMR.1027.136

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In Situ Measurement and Compensation Turning Technique of Deep MgF₂ Conformal Dome
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1027In Situ Measurement and Compensation Turning...

In Situ Measurement and Compensation Turning Technique of Deep MgF₂ Conformal Dome

Abstract:

The adoption of conformal optics system can evidently improve the synthetical performance of infrared missiles. Hot-pressing poly-crystal magnesium fluoride (MgF₂) is an ideal material for conformal optics dome. But many problems about machining and surface test of deep aspheric surface have not been solved at present, and there is not much research about the machining characteristics of MgF₂ material. In this paper, in-situ measurement system is designed, so positional errors that introduced by repeating installation can be avoided. Then, machining process of MgF₂ material by single point diamond turning is studied, and optimized diamond turning process is proposed by experiments in order to obtain low surface roughness. Furthermore, surface accuracy is tested by on-machine measurement system. Based on the result, error compensation process of conformal dome is carried out. Finally, the shape error of the dome is less than 0.8μm PV.

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Periodical:

Advanced Materials Research (Volume 1027)

Pages:

136-139

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1027.136

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Online since:

October 2014

Authors:

Deng Chao Zhu, Yi Fan Dai, Chao Liang Guan*, Gui Lin Wang, Gui Peng Tie

Keywords:

Conformal Optics, Deep Aspheric Surface, Error Compensation, Hot-Pressing Poly-Crystal Magnesium Fluoride, In Situ Measurement

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