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Proceedings Paper

Free-beam delay line for a multi-aperture optical space interferometer stabilized on a guide star
Author(s): Bart Snijders; Ben C. Braam; Henk Bokhove
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Paper Abstract

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.

Paper Details

Date Published: 13 September 1994
PDF: 8 pages
Proc. SPIE 2209, Space Optics 1994: Earth Observation and Astronomy, (13 September 1994); doi: 10.1117/12.185275
Show Author Affiliations
Bart Snijders, TNO-TPD (Netherlands)
Ben C. Braam, TNO-TPD (Netherlands)
Henk Bokhove, TNO-TPD (Netherlands)


Published in SPIE Proceedings Vol. 2209:
Space Optics 1994: Earth Observation and Astronomy
Guy Cerutti-Maori; Philippe Roussel, Editor(s)

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