Telescope simulator for the Nexus wavefront control testbed

Andrew E. Lowman; Fang Shi; David C. Redding; Scott A. Basinger; Charles W. Bowers; Pamela S. Davila

doi:10.1117/12.394014

28 July 2000 Telescope simulator for the Nexus wavefront control testbed

Andrew E. Lowman, Fang Shi, David C. Redding, Scott A. Basinger, Charles W. Bowers, Pamela S. Davila

Proceedings Volume 4013, UV, Optical, and IR Space Telescopes and Instruments; (2000) https://doi.org/10.1117/12.394014
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

A telescope simulator was built as part of the Nexus wavefront control testbed, an NGST technology experiment at NASA's Goddard Space Flight Center. This testbed was designed to demonstrate complete control of a segmented telescope, from initial capture of light, through coarse alignment and phasing, to fine phasing and wavefront control. The existing telescope simulator allows testing of the fine phasing and wavefront control steps. A small deformable mirror in the simulator allows generation of an unobscured aberrated wavefront, for use in exploring the range of measurement and correction using the testbed's image-based wavefront sensor and larger deformable mirror. An alternate path under development for the simulator will create a segmented wavefront using three spherical mirrors; three-degree-of-freedom mounts under each mirror enable alignment and phasing experiments that will cover most of the operation sequence. Details of the hardware design and performance will be presented.

Citation Download Citation

Andrew E. Lowman, Fang Shi, David C. Redding, Scott A. Basinger, Charles W. Bowers, and Pamela S. Davila "Telescope simulator for the Nexus wavefront control testbed", Proc. SPIE 4013, UV, Optical, and IR Space Telescopes and Instruments, (28 July 2000); https://doi.org/10.1117/12.394014

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