NPS sparse aperture testbed

Brij N. Agrawal; Jae Jun Kim; Jeffrey Baker; Ty Martinez; Bautista Fernandez

doi:10.1117/12.2528022

9 September 2019 NPS sparse aperture testbed

Brij N. Agrawal, Jae Jun Kim, Jeffrey Baker, Ty Martinez, Bautista Fernandez

Proceedings Volume 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX; 111150F (2019) https://doi.org/10.1117/12.2528022
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

This paper presents NPS Sparse Aperture Testbed development to demonstrate sparse aperture concept. The testbed has a sparse aperture array consisting of three 2-inch diameter F/20 spherical mirrors. Each mirror is connected to a separate 6 axis ThorLabs stage to simulate motion in satellite formation. The beam combining platform employs three 1-inch diameter flat mirrors mounted on the correcting PI tip/tilt/piston actuated stages to provide coherent beam combining capabilities. For metrology, the system uses Zygo 9 single-axis displacement measuring interferometers. Transformation matrix between the aperture motion measured by the metrology and required motion by the correcting piston and tip/tilt stages was determined. The mirrors were moved continuously representing satellite formation errors and the motion was measured by laser metrology and using transformation matrix, the correcting stages were commanded, resulting in coherent combination of images from three apertures.

Citation Download Citation

Brij N. Agrawal, Jae Jun Kim, Jeffrey Baker, Ty Martinez, and Bautista Fernandez "NPS sparse aperture testbed", Proc. SPIE 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, 111150F (9 September 2019); https://doi.org/10.1117/12.2528022

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