Optical space telescope without mirrors

doi:10.1117/12.2561673

Optical space telescope without mirrors

2020-12-13

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DOI：10.1117/12.2561673

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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.

Keyword:

exoplanet

spectroscopy

holography

Gabor Zone Plate

Newton Prism Experiment

Dittoscope

Optical space telescope without mirrors

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