Optical delay line for stellar interferometer

Details Optical delay line for stellar interferometer Optical delay line for stellar interferometer

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..463k&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89

Computer Science

Performance

3

Delay Lines, Interferometers, Optical Equipment, Stellar Spectrophotometry, Astronomical Spectroscopy, Block Diagrams, French Space Program, Transfer Functions

Scientific paper

One of the major design guidelines of the CHARON program (consisting of a cross shaped array of five 26 cm diameter telescopes allowing variable baselines up to 50 m) was to avoid the utilization of a laser metrology, principally for simplicity and cost reasons. The objective was to achieve a delay line whose vibration level during translation remains negligible, i.e., less tham 12 nm RMS for a 15 msec exposure time, without any measurement of the actual optical path length introduced by the delay line. The optical delay line is built around a 1-meter stroke, retail-market translation table whose carriage can move at speeds between 0.1 micron/sec and 1 mm/sec, while generating a low vibrational level. Results indicate that the performance values achieved were satisfactory for both optical and mechanical aspects.

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