Diffraction on a segmented telescope mirror

Details Diffraction on a segmented telescope mirror Diffraction on a segmented telescope mirror

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sva....26..734l&link_type=abstract

(Astronomicheskii Zhurnal, vol. 59, Nov.-Dec. 1982, p. 1225-1228) Soviet Astronomy (ISSN 0038-5301), vol. 26, Nov.-Dec. 1982, p.

Physics

Optics

Diffraction, Geometrical Optics, Mirrors, Reflecting Telescopes, Distribution Functions, Illuminance, Resolution, Segments

Scientific paper

The possibility of using a composite telescope mirror as a reflection echelon is demonstrated. An aberration-free optical telescopic system whose primary mirror is made up of identical hexagons is analyzed in terms of the distribution function of illuminance in the diffraction image of a point and the interference function characterizing the effect of the interference of beams from all the segments. It is shown that a polychromatic point image can be expanded into a spectrum using a segemented mirror; the resolving power and angular dispersion of the mirror acting as a reflection echelon are obtained. A limit is found for the maximum size of a segment for a chosen magnification, based on the need to avoid blurring of the interference effect.

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