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9 January 1984 On The Possible Use Of Deep U.V. Photoresists Correctors To Obtain The Ultimate U.V. Resolution Of Space Borne Telescopes
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Abstract
Large Space Borne Telescopes are limited in their Ultra Violet resolution by their large and medium scale (20-30 cm) surface irregularities (ripples). We present the principle, instrumentation and first results of a new interferometric method using a Michelson-Twyman configuration (diverging light beams) that allows to engrave on deep U.V. photoresists a phase compensating plate which permit to recover, partly or entirely, the diffraction limited resolution of the telescope. In our recording procedure there is no intermediary step between the "aberrated" mirror and its corrector : the aberrated mirror directly records its own corrector with all the interferometric quality available from a 257 nm U.V. coherent source. The corrector that we obtain is a phase compensating plate in reflection with highs and lows on its surface perfectly conjugated in negative, with the primary mirror surface irregularities.
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Luc Dame, Roger M Bonnet, and Guy E Artzner "On The Possible Use Of Deep U.V. Photoresists Correctors To Obtain The Ultimate U.V. Resolution Of Space Borne Telescopes", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); https://doi.org/10.1117/12.966163
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