Optical space telescope without mirrors

Thomas D. Ditto; Mei-Li Hsieh; Heidi Jo Newberg; Leaf Swordy; Robert Hoyt; Jesse Cushing

doi:10.1117/12.2561673

13 December 2020 Optical space telescope without mirrors

Thomas D. Ditto, Mei-Li Hsieh, Heidi Jo Newberg, Leaf Swordy, Robert Hoyt, Jesse Cushing

Proceedings Volume 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave; 114431B (2020) https://doi.org/10.1117/12.2561673
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

A notional space telescope without any mirrors or lenses is being investigated. DUET (Dual Use Exoplanet Telescope) has a gossamer membrane annular Gabor Zone Plate primary objective that is flat. Highly chromatic stellar imagery is disambiguated in a secondary also made from diffractive elements. The data acquired is intrinsically spectrographic and could (1) detect radial velocity below 5 cm/sec and (2) take direct spectra of a systems exoplanets. DUET is intended as a follow-up to a survey telescope, THE MOST, being developed in tandem which will identify target stellar systems with earth-like exoplanets. DUET observes one star at a time, integrating its light until the exoplanetary system is resolved. DUET utilizes a battery of coronographic methods including angular differential imaging, interferometric nulling, and phased Fraunhofer line subtraction. The potential performance has been given preliminary laboratory tests which are detailed in Conference AS11451-192.

Conference Presentation

Citation Download Citation

Thomas D. Ditto, Mei-Li Hsieh, Heidi Jo Newberg, Leaf Swordy, Robert Hoyt, and Jesse Cushing "Optical space telescope without mirrors", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 114431B (13 December 2020); https://doi.org/10.1117/12.2561673

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