DUET: dual use exoplanet telescope

Thomas D. Ditto; Mei-Li Hsieh

doi:10.1117/12.2676811

4 October 2023 DUET: dual use exoplanet telescope

Thomas D. Ditto, Mei-Li Hsieh

Proceedings Volume 12676, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts XI; 1267609 (2023) https://doi.org/10.1117/12.2676811
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

DUET is an embodiment of an astronomical telescope without mirrors or lenses. All optics are diffractive. The primary objective is a gossamer membrane annular Gabor Zone Cone which has the characteristic of focusing by wavelength. The secondary is a very high resolution spectrometer. The annulus primary has a diameter sufficiently wide so that the spectral separation of the parent star is resolved to cm/sec Doppler shift as needed to detect Earth analogs in the 10 pc "Neighborhood." Proximate stars are removed by the dual dispersion method permitted with a precise secondary spectrometer. Residual photons detected after coronagraphy come from the exoplanetary system and are natively spectrographic. The optical train allows for new types of coronagraphy, because of a natural bandpass spectral separation. Two types of coronagraph are proposed. The physical embodiment presumes in-space construction. The large primary is delivered as a ribbon on mandrels and is installed over a network of active trusses.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Thomas D. Ditto and Mei-Li Hsieh "DUET: dual use exoplanet telescope", Proc. SPIE 12676, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts XI, 1267609 (4 October 2023); https://doi.org/10.1117/12.2676811

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