Abstract

It has been known for some time that, if curved legs rather than the usual straight ones are used in the spider that supports the secondary optics in certain telescopes, the visible diffraction effect is reduced. Fraunhofer theory is used to calculate the diffraction effects due to the curved leg spider. Calculated and photographic diffraction patterns are compared for straight and curved leg spiders.

© 1984 Optical Society of America

Diffraction effects of telescope secondary mirror spiders on various image-quality criteria

James E. Harvey and Christ Ftaclas
Appl. Opt. 34(28) 6337-6349 (1995)

Fresnel diffraction by a semitransparent straight edge object with acoustically coherence-controllable illumination

Yoshihiro Ohtsuka and Yin Mei Cheah
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Sonine’s Bessel identity applied to apodization

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Comparison of the imaging characteristics of curved-channel and straight-channel microchannel plates

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Comparison of various grazing incidence spectrometer designs based on conical diffraction

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