Optical design considerations for next-generation space and lunar telescopes

Dietrich G. Korsch

doi:10.1117/12.46718

1 September 1991 Optical design considerations for next-generation space and lunar telescopes

Dietrich G. Korsch

Proceedings Volume 1494, Space Astronomical Telescopes and Instruments; (1991) https://doi.org/10.1117/12.46718
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

The paper discusses the optical requirements for future large space or lunar telescopes and their influence upon the fundamental system parameters. Two telescope concepts, a four-reflection three-mirror telescope, and a spherical-primary four-mirror telescope are introduced. Both have the potential for extreme high performance, and both use four reflections to accomplish this. Considering the present available coating capabilities, the reflectivity loss in the lower UV region due to the additional reflections, compared to a two-mirror system, seriously affects the utility of four-mirror telescopes for this part of the spectrum. Separate telescopes for the UV and for longer wavelengths may therefore be a practical solution, unless significant advances in coating technology are made in the foreseeable future.

Citation Download Citation

Dietrich G. Korsch "Optical design considerations for next-generation space and lunar telescopes", Proc. SPIE 1494, Space Astronomical Telescopes and Instruments, (1 September 1991); https://doi.org/10.1117/12.46718

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