Optic-misalignment tolerances for the POINTS interferometers

Martin Charles Noecker; Marc A. Murison; Robert D. Reasenberg

doi:10.1117/12.155749

10 September 1993 Optic-misalignment tolerances for the POINTS interferometers

Martin Charles Noecker, Marc A. Murison, Robert D. Reasenberg

Proceedings Volume 1947, Spaceborne Interferometry; (1993) https://doi.org/10.1117/12.155749
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

We present the results of two parallel studies of the sensitivity of astrometric measurements to misalignment of each of the major optical assemblies in the POINTS instrument. Tilt and displacement of the optics lead to tilt, displacement, and defocussing of the starlight and metrology beams, giving rise to systematic errors. In one method, we derive analytic expressions for the lowest order dependence of the error on the misalignment, and evaluate them in the present interferometer design. In the second method, we use a commercial numerical ray tracing program to calculate the overall optical path travelled through the misaligned starlight and metrology paths; from those results, our own software determines the dependence of the residual error on the original misalignment. These sensitivities are compared to the analytic results for mutual verification. We also discuss the impact these results have had on the design of the instrument.

Citation Download Citation

Martin Charles Noecker, Marc A. Murison, and Robert D. Reasenberg "Optic-misalignment tolerances for the POINTS interferometers", Proc. SPIE 1947, Spaceborne Interferometry, (10 September 1993); https://doi.org/10.1117/12.155749

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