Pupil geometry and pupil re-imaging in telescope arrays

Details Pupil geometry and pupil re-imaging in telescope arrays Pupil geometry and pupil re-imaging in telescope arrays

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1237...70t&link_type=abstract

IN: Amplitude and intensity spatial interferometry; Proceedings of the Meeting, Tucson, AZ, Feb. 14-16, 1990 (A91-30676 12-89).

Physics

Optics

1

Imaging Techniques, Interferometers, Pupil Size, Telescopes, Apertures, Arrays, Mirrors, Optical Paths, Wave Fronts

Scientific paper

This paper considers the issues of lateral and longitudinal pupil geometry in ground-based telescope arrays, such as IOTA. In particular, it is considered whether or not pupil re-imaging is required before beam combination. By considering the paths of rays through the system, an expression is derived for the optical path errors in the combined wavefront as a function of array dimensions, telescope magnification factor, viewing angle, and field-of-view. By examining this expression for the two cases of pupil-plane and image-plane combination, operational limits can be found for any array. As a particular example, it is shown that for IOTA no pupil re-imaging optics will be needed.

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