The Canadian Astro-H metrology system

Luigi Gallo; Casey Lambert; Alex Koujelev; Denis Laurin; Stephane Gagnon; Martin Guibert

doi:10.1117/12.926371

17 September 2012 The Canadian Astro-H metrology system

Luigi Gallo, Casey Lambert, Alex Koujelev, Denis Laurin, Stephane Gagnon, Martin Guibert

Proceedings Volume 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray; 844354 (2012) https://doi.org/10.1117/12.926371
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The Hard X-ray Telescopes on Astro-H have a 12-meter focal length. In order to achieve this long focal length and still fit compactly in the H-IIA launch fairing, the detectors are mounted at the end of an extendable optical bench that will be deployed in orbit. Once in operations, the spacecraft will experience distortions primarily due to thermal fluctuations in low-earth orbit and it is important that thte misalignment between the telescopes and instruments is accurately measured. The Canadian Astro-H Metrology System (CAMS) is a laser alignment system that will measure optical alignment deviations. The CAMS is compact, consumes little power, and is stable over a wide temperature range. The system will be used to measure lateral (X/Y) displacement as well as rotational shifts in the optical bench. In addition, the CAMS data can be used to enhance the quality of the hard X-ray images that will have been degraded by the deviations.

Citation Download Citation

Luigi Gallo, Casey Lambert, Alex Koujelev, Denis Laurin, Stephane Gagnon, and Martin Guibert "The Canadian Astro-H metrology system", Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844354 (17 September 2012); https://doi.org/10.1117/12.926371

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