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Proceedings Paper

Lens-Prism Correctors For Ritchey-Chretien And Quasi Ritchey-Chretien Foci
Author(s): Su Ding -qiang; Liang Ming
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Paper Abstract

Two new lens-prism correctors are designed for secondary foci, of which the diameter of the primary is 7.5 meter, the f-ratio of the primary is 2 and the final f-ratio is about 5.4. The field of view of the R-C system is 46 and that of the quasi R-C system is 1°. These correctors can be used for the correction of both the aberrations and the atmospheric disper-sion. They consist of two cemented lenses. Each cemented lens is made of two different kinds of glasses, of which the indexes of refraction are near and the dispersions are different. The cemented surface is tilted. The two cemented lenses can rotate oppositly around the optical axis for correcting the atmospheric dispersion at different zenith distance. All of surfaces of these correctors are spherical. Spot diagrams of two systems are given for three relative orientations of two cemented lenses, each at nine positions in the field of view, which show both the monochromatic image quality and the effect of correcting the atmospheric dispersion are excellent.

Paper Details

Date Published: 20 August 1986
PDF: 7 pages
Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); doi: 10.1117/12.963568
Show Author Affiliations
Su Ding -qiang, Academia Sinica (China)
Liang Ming, Academia Sinica (China)

Published in SPIE Proceedings Vol. 0628:
Advanced Technology Optical Telescopes III
Lawrence D. Barr, Editor(s)

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