Physics – Optics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apopt..25..503d&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 25, Feb. 15, 1986, p. 503-509.
Physics
Optics
2
Apertures, Digital Techniques, Interferometry, Mirrors, Optical Measurement, Flat Surfaces, Kalman Filters
Scientific paper
A procedure used for testing afocal telescopes involves the use of a double-pass interferometer and a large flat mirror. The present paper is concerned with the employment of a number of smaller flats because of difficulties to obtain a sufficiently large reference flat, taking into account the utilization of a subaperture testing (SAT) technique. The classical SAT theory is extended to cover sequences of measurements. Attention is given to the solution to the static SAT problem, the dynamic SAT problem, a new solution to the dynamic SAT problem, the use of a simplified Kalman filter in the implementation of the new solution, the simulation of interferometer measurements, a primary test case, a performance criterion, test results, the sensitivity of the Kalman processor to subaperture misalignment, and the sensitivity to measurement noise.
de Hainaut Christopher R.
Erteza Ahmed
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