15 October 2012 Measurement of an off-axis parabolic mirror using coordinates measurement machine and swing arm profilometer during the grinding process
Author Affiliations +
Proceedings Volume 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 84150K (2012) https://doi.org/10.1117/12.976811
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China
Abstract
We present the measurement methods for off-axis parabolic mirrors using Coordinates Measurement Machine and Swing Arm Profilometer during the grinding process. An off-axis parabolic mirror with 1200mm in parent focal length, 360mm in off-axis displacement and 410mm in diameter is measured using the methods introduced in this paper. The convergence curves of the surface error are reported, which is reduced from 204.7μm in PV, 55.3μm in rms to 1.1μm in PV, 0.3μm in rms after 39 iterations of grinding. Besides, the measurement methods are able to control the parent focal length and off-axis displacement to less than 0.1mm tolerance. An interferometric result is presented, which validates the measurement methods.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hongwei Jing, Hongwei Jing, Changqing Lin, Changqing Lin, Bin Fan, Bin Fan, Long Kuang, Long Kuang, Shibin Wu, Shibin Wu, Fan Wu, Fan Wu, Tianquan Fan, Tianquan Fan, } "Measurement of an off-axis parabolic mirror using coordinates measurement machine and swing arm profilometer during the grinding process", Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 84150K (15 October 2012); doi: 10.1117/12.976811; https://doi.org/10.1117/12.976811
PROCEEDINGS
9 PAGES


SHARE
Back to Top