Computer Science – Performance
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8214998h&link_type=abstract
Unknown
Computer Science
Performance
Atmospheric Effects, Infrared Telescopes, Optical Properties, Performance Tests, Irises (Mechanical Apertures), Microwave Spectra, Modulation Transfer Function, Point Spread Functions, Spatial Resolution, Wave Diffraction
Scientific paper
Aperture diffraction modulation transfer functions (MTF) were calculated at wavelengths from 0.5 to 10 microns, for a primary aperture of 3.8m, and a secondary diameter of 0.95m. Measured MTF at 0.5 to 4 microns for UKIRT optics is compared with aperture diffraction MTF, including the effect of average seeing conditions. Wavelength dependent MTF under good atmospheric seeing conditions, i.e. 0.5, 1, and 2 arcsec seeing, are presented with point spread functions. Performance matches predictions. The theory of MTF is introduced. It measures the modulation or contrast of features in the exit pupil at various spatial frequencies and expresses them in linear or angular separation distances.
Humphries Colin M.
Purkins T. E.
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