대두경 알루미늄 합금의 비구면 반사경 형상가공 향상에 관한 연구

This paper described about the technique of ultra-precision machining for aerospace aspheric mirror The reflection mirror system generate parallel beam inside the thermal vacuum chamber A 300 ㎜ diameter asphenc mirror was fabricated by SPDTM Aluminum alloy for mirror substrates is known to be easily machining, but not polishable due to its ductility Aspheric large reflector without a conventional polishing process, the surface roughness of 10 ㎚ Ra, and the form error of λ/2 ~ λ/4(λ=632 8 ㎚) for reference curved surface 300 ㎜ has been required The purpose of this research is to find the optimum machining conditions for reflector cutting of A16061-T651 and apply the SPDTM technique to the manufacturing of ultra precision optical components of Al-alloy aspheric reflector