20 August 1986 Lens-Prism Correctors For Ritchey-Chretien And Quasi Ritchey-Chretien Foci
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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.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Su Ding -qiang, Su Ding -qiang, Liang Ming, Liang Ming, } "Lens-Prism Correctors For Ritchey-Chretien And Quasi Ritchey-Chretien Foci", Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); doi: 10.1117/12.963568; https://doi.org/10.1117/12.963568
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