Lensless scanning telescope

Details Lensless scanning telescope Lensless scanning telescope

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apopt..19..504e&link_type=abstract

Applied Optics, vol. 19, Feb. 15, 1980, p. 504-507.

Physics

Optics

Light Transmission, Modulation Transfer Function, Optical Scanners, Spaceborne Telescopes, Apertures, Instrument Errors, Spatial Filtering, Wave Diffraction

Scientific paper

A lensless scanning telescope composed of two circular apertures and having good response with minimum aliasing is described. By analogy with an arrangement of two slits, the modulation transfer function (MTF) of this telescope is derived. The MTF of a lensless telescope scanning the earth's surface from 500-km orbit is developed for both the scan and cross-scan directions. Response of 48% or better at 100-km wavelength in both directions is shown with aliasing errors due to sampling of 1% or less.

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