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. 1981 Dec 1;20(23):4094-6.
doi: 10.1364/AO.20.004094.

Annular-aperture wide-field camera

G R Carruthers

Annular-aperture wide-field camera

G R Carruthers. Appl Opt. .

Abstract

An annular-aperture wide-field camera, consisting of a spherical mirror and an annular aperture stop at its center of curvature (essentially a correctorless Schmidt camera), has been shown through analysis and laboratory tests to be a useful imaging device in the far and extreme UV, where the efficiencies of conventional refractive correctors and of reflective mirror coatings are relatively low.

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