Brassboard Astrometric Beam Combiner (ABC) development for the Space Interferometry Mission (SIM)

Muthu Jeganathan; Gary Kuan; Mike Rud; Sean Lin; Kristen Sutherland; James Moore; Xin An

doi:10.1117/12.789520

28 July 2008 Brassboard Astrometric Beam Combiner (ABC) development for the Space Interferometry Mission (SIM)

Muthu Jeganathan, Gary Kuan, Mike Rud, Sean Lin, Kristen Sutherland, James Moore, Xin An

Proceedings Volume 7013, Optical and Infrared Interferometry; 70134X (2008) https://doi.org/10.1117/12.789520
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The Astrometric Beam Combiner (ABC) is a critical element of the Space Interferometry Mission (SIM) that performs three key functions: coherently combine starlight from two siderostats; individually detect starlight for angle tracking; and disperse and detect the interferometric fringes. In addition, the ABC contains: a stimulus, cornercubes and shutters for in-orbit calibration; several tip/tilt mirror mechanisms for in-orbit alignment; and internal metrology beam launcher for pathlength monitoring. The detailed design of the brassboard ABC (which has the form, fit and function of the flight unit) is complete, procurement of long-lead items is underway, and assembly and testing is expected to be completed in Spring 2009. In this paper, we present the key requirements for the ABC, details of the completed optical and mechanical design as well as plans for assembly and alignment.

Citation Download Citation

Muthu Jeganathan, Gary Kuan, Mike Rud, Sean Lin, Kristen Sutherland, James Moore, and Xin An "Brassboard Astrometric Beam Combiner (ABC) development for the Space Interferometry Mission (SIM)", Proc. SPIE 7013, Optical and Infrared Interferometry, 70134X (28 July 2008); https://doi.org/10.1117/12.789520

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