14 August 2006 Measurement of the non-common vertex error of a double corner cube
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Abstract
The Space Interferometry Mission (SIM) requires the control of the optical path of each interferometer with picometer accuracy. Laser metrology gauges are used to measure the path lengths to the fiducial corner cubes at the siderostats. Due to the geometry of SIM a single corner cube does not have sufficient acceptance angle to work with all the gauges. Therefore SIM employs a double corner cube. Current fabrication methods are in fact not capable of producing such a double corner cube with vertices having sufficient commonality. The plan for SIM is to measure the non-commonalty of the vertices and correct for the error in orbit. SIM requires that the non-common vertex error (NCVE) of the double corner cube to be less than 6 μm. The required accuracy for the knowledge of the NCVE is less than 1 μm. This paper explains a method of measuring non-common vertices of a brassboard double corner cube with sub-micron accuracy. The results of such a measurement will be presented.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alireza Azizi, Alireza Azizi, Martin Marcin, Martin Marcin, Douglas Moore, Douglas Moore, Steve Moser, Steve Moser, John Negron, John Negron, Eung-Gi Paek, Eung-Gi Paek, Daniel Ryan, Daniel Ryan, Alex Abramovici, Alex Abramovici, Paul Best, Paul Best, Ian Crossfield, Ian Crossfield, Bijan Nemati, Bijan Nemati, Tim Neville, Tim Neville, B. Platt, B. Platt, Leonard Wayne, Leonard Wayne, } "Measurement of the non-common vertex error of a double corner cube", Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 629203 (14 August 2006); doi: 10.1117/12.696088; https://doi.org/10.1117/12.696088
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