Effect of telecentric use of narrow-band filters on diffraction-limited imaging

Details Effect of telecentric use of narrow-band filters on diffraction-limited imaging Effect of telecentric use of narrow-band filters on diffraction-limited imaging

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3355..955b&link_type=abstract

Proc. SPIE Vol. 3355, p. 955-961, Optical Astronomical Instrumentation, Sandro D'Odorico; Ed.

Physics

Optics

1

Scientific paper

Sometimes Fabry-Perot, and other narrow-band filters, are used for astronomical imaging in the so-called telecentric mode. In it the pupil is collimated through the filter, resulting in different incidence angles on the filter for rays coming from different parts of the objective. This results in variations of the central transmission wavelength, which broaden the effective filter bandpath. In addition each wavelength within this filter bandpath sees a different illumiatnon of the pupil when viewed from behind the fitler. This causes the diffraction limited point-spread-function to vary with wavelength. With the advent of diffraction limited imaging using adaptive optics, this can cause complications. In this paper, which elaborates further on research published elsewhere, I examine the magnitude of this effect.

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