This paper uses a pseudo-cassegrain system as the initial structure, whose full field of view and F number are 5.6°and 1.63, respectively. Then the authors make further improvements and optimization in large weights and serious central obscuration. The final system is designed with preference of smaller central obscuration, lower manufacturing difficulty, lighter, simpler configuration and lower cost compared with the initial pseudo-cassegrain optical system. In addition, what is different from the previous modified cassegrain system is that secondary mirror of the final system is a plane mirror which is easier to fabricate and install. At the same time, the final system has three significant characteristics of these three systems: cassegrain, maksutov and schmidt. At last, the dissertation certificates the feasibility of the new system in the angle of aberration analysis, spot diagram analysis and energy analysis. It also provides a new design method for the optical system of moderate field, large relative aperture and wide spectral.

Date Published: 21 August 2013
PDF: 7 pages
Proc. SPIE 8908, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications, 89081R (21 August 2013); doi: 10.1117/12.2034464

Published in SPIE Proceedings Vol. 8908:
International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications
Jun Ohta; Nanjian Wu; Binqiao Li, Editor(s)