Free-beam delay line for a multi-aperture optical space interferometer stabilized on a guide star

Details Free-beam delay line for a multi-aperture optical space interferometer stabilized on a guide star Free-beam delay line for a multi-aperture optical space interferometer stabilized on a guide star

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2209..423s&link_type=abstract

Proc. SPIE Vol. 2209, p. 423-430, Space Optics 1994: Earth Observation and Astronomy, M. G. Cerutti-Maori; Philippe Roussel; Eds

Physics

Optics

Scientific paper

A key technique for optical aperture synthesis instruments is the cophasing of the beams from the individual apertures. A cophasing system includes a number of delay lines for the adjustment of the optical path lengths. The design of a high-resolution delay line is based on the mission requirements of a space-borne interferometer. A cat's-eye type of retroreflector is the selected option for the optics. Three delay lines, including actuators and control electronics, have been built and have been tested in a dedicated setup, which includes a star simulator and a cophasing interferometer. The test results support the feasibility of the presented delay line concept.

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