천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제42권1호
- /
- Pages.57.3-58
- /
- 2017
- /
- 1226-2692(pISSN)
Fabrication of Freeform Aluminum mirrors for Wide Field Infrared Telescopes
- Jeong, Byeongjoon (Optical Instrumentation Development Team, Korea Basic Science Institute (KBSI)) ;
- Gwak, Jeongha (Dept. of Astronomy and Space Science, Kyung Hee University) ;
-
Pak, Soojong
(School of Space Research, Kyung Hee University)
;
-
Kim, Geon Hee
(Optical Instrumentation Development Team, Korea Basic Science Institute (KBSI))
;
- Lee, Kwang Jo (Dept. of Applied Physics, Kyung Hee University) ;
- Park, Junbeom (Yoonseul Inc.) ;
- Lee, Hye-In (School of Space Research, Kyung Hee University) ;
- Park, Woojin (School of Space Research, Kyung Hee University) ;
- Ji, Tae-Geun (School of Space Research, Kyung Hee University)
- 발행 : 2017.04.10
초록
Single Point Diamond Turning (SPDT) is a cost-effective technique to fabricate metallic mirrors. In particular, the servo-assisted diamond turning option is highly useful for the fabrication of freeform surfaces. However, the SPDT process leaves periodic tool marks on machined mirror surfaces, leading to undesirable diffraction effect, as well as the deviation of input beam. In order to solve this problem, we propose new SPDT machining conditions to minimize tool marks. We will also show the results from optical measurement and Power Spectral Density (PSD) analysis to evaluate the expectable performance for applications in wide field infrared telescopes.
키워드