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  • 1
    Publication Date: 2019-07-13
    Description: The Wavefront Control Testbed (WCT) was created to develop and test wavefront sensing and control algorithms and software for the segmented James Webb Space Telescope (JWST). Last year, we changed the system configuration from three sparse aperture segments to a filled aperture with three pie shaped segments. With this upgrade we have performed experiments on fine phasing with line-of-sight and segment-to-segment jitter, dispersed fringe visibility and grism angle;. high dynamic range tilt sensing; coarse phasing with large aberrations, and sampled sub-aperture testing. This paper reviews the results of these experiments.
    Keywords: Space Sciences (General)
    Type: SPIE Astronomical Telescopes Conference; Jun 21, 2004 - Jun 25, 2004; Glasgow, Scotland; United Kingdom
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Description: Future large astronomical telescopes in space will have architectures that will have complex and demanding requirements to meet the science goals. The Large UV/Optical/IR Surveyor (LUVOIR) mission concept being assessed by the NASA/Goddard Space Flight Center is expected to be 8 to 16 meters in diameter, have a segmented primary mirror, active control, and be diffraction limited at a wavelength of 500 nanometers. The optical stability is expected to be in the picometer range for minutes to hours. Architecture studies to support the NASA Science and Technology Definition teams (STDTs) are underway to evaluate systems performance. A wave front error budget has been developed to help define the technology needs and assess performance. The budget includes both spatial and temporal domain aspects for the active, adaptive and passive elements in the optical design.
    Keywords: Astronomy
    Type: GSFC-E-DAA-TN66136 , SPIE Astronomical Telescopes + Instrumentation; Jun 10, 2018 - Jun 15, 2018; Austin, TX; United States|Proceedings of SPIE, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave (ISSN 0277-786X) (e-ISSN 1996-756X); 10698; 1069813
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