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Proceedings Paper

Design of Cassegrain-Schmidt optical system
Author(s): Peiming Hao; Kexin Li; Zhengting Wang
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Paper Abstract

The image plane of Newton-Schmidt system is between Schmidt corrector and spheric mirror, which is difficult to be received. Cassegrain-Schmidt system is put forward to shift the image plane behind the primary mirror1. Based on the third order aberration theory and Gaussian formula, and choices of defocus Δ and neutral zone hn, new parameters obscuration ratio of two Cassegrain α mirrors and magnification of the secondary mirror β and concentric condition of two Cassegrain mirrors, the equation of corrector including the 2nd and 4th order terms of the even aspheric plate is established. Then the 4th, 6th and 8th order terms of Schmidt corrector plate are solved by inverse-ray tracing to correct high order spherical aberration. To reduce chromatic aberration of Cassegrain-Schmidt system, new types of achromatic Cassegrain-Schmidt systems are put forward and discussed.

Paper Details

Date Published: 14 November 2007
PDF: 6 pages
Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 67224F (14 November 2007); doi: 10.1117/12.783681
Show Author Affiliations
Peiming Hao, Tongji Univ. (China)
Kexin Li, Tongji Univ. (China)
Zhengting Wang, Tongji Univ. (China)


Published in SPIE Proceedings Vol. 6722:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies

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