System performance analysis for COSTAR design

Paul A. Lightsey; John D. Gerber; Michael L. Kaplan; Dennis A. Teusch

doi:10.1117/12.158779

1 November 1993 System performance analysis for COSTAR design

Paul A. Lightsey, John D. Gerber, Michael L. Kaplan, Dennis A. Teusch

Proceedings Volume 1945, Space Astronomical Telescopes and Instruments II; (1993) https://doi.org/10.1117/12.158779
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

The Corrective Optics Space Telescope Axial Replacement (COSTAR) instrument is designed to provide optical correction for the current figure error in the Hubble Space Telescope (HST) primary mirror to three of the first generation instruments: Faint Object Camera (FOC), Faint Object Spectrometer (FOS), and the Goddard High Resolution Spectrometer. The FOC and FOS each have two optical channels and the GHRS one optical channel that are corrected. The optical correction is achieved by deploying a two mirror relay into the HST hub area in front of the Optical Telescope Assembly (OTA) focal surface for each optical channel. Structural motion of the mirror support system will affect alignment producing changes in wave front error (wfe) and line-of-sight (los). Changes of los during an exposure will blur the image and degrade image quality in addition to alignment degradation of wfe. The system analyses used to perform image quality trades and allocate budgets in the design phase and to help define requirements for the integration and test phase will be presented. These analyses were an integrated and iterative process among the optical, structural, and thermal analysis disciplines. Results of these analyses predict COSTAR performance will meet the image quality requirements.

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Paul A. Lightsey, John D. Gerber, Michael L. Kaplan, and Dennis A. Teusch "System performance analysis for COSTAR design", Proc. SPIE 1945, Space Astronomical Telescopes and Instruments II, (1 November 1993); https://doi.org/10.1117/12.158779

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KEYWORDS

Mirrors

Optical fiber cables

Image quality

Channel projecting optics

Tolerancing

Motion models

Optical calibration

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