Ultralightweight hybrid refractive/diffractive MODE telescopes for space applications

Thomas D. Milster; Nick Brar; Yingying Zhang; Young-Sik Kim; Heejoo Choi; Marcos Esparza; Daewook Kim; Allen Yi; Yuxin Cai; Geonhee Kim; Daniel Apai

doi:10.1117/12.2677762

5 October 2023 Ultralightweight hybrid refractive/diffractive MODE telescopes for space applications

Thomas D. Milster, Nick Brar, Yingying Zhang, Young-Sik Kim, Heejoo Choi, Marcos Esparza, Daewook Kim, Allen Yi, Yuxin Cai, Geonhee Kim, Daniel Apai

Author Affiliations +

Proceedings Volume PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV; PC126770G (2023) https://doi.org/10.1117/12.2677762
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Progress in development of a multiple-order diffractive engineered (MODE) lens as applied to space telescopes, where an ultralightweight primary lens is used instead of a mirror, is presented. Precision glass molding is used to fabricate a prototype 0.24 m diameter primary lens, and advanced alignment technology is used to bond lens segments into a ridged, monolithic structure. The primary lens is used in an f/4.17 telescope with a color corrector that provides diffraction-limited imaging over the astronomical R-band of wavelengths (589 nm to 727 nm) and +/- 0.125° field of view. Fabrication data, alignment results, and imaging experiments are presented.

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Citation Download Citation

Thomas D. Milster, Nick Brar, Yingying Zhang, Young-Sik Kim, Heejoo Choi, Marcos Esparza, Daewook Kim, Allen Yi, Yuxin Cai, Geonhee Kim, and Daniel Apai "Ultralightweight hybrid refractive/diffractive MODE telescopes for space applications", Proc. SPIE PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, PC126770G (5 October 2023); https://doi.org/10.1117/12.2677762

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KEYWORDS

Telescopes

Optical alignment

Fabrication

Lenses

Optical fabrication

Space telescopes

Space mirrors

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