| タイトル | Cryogenic Optical Position Encoders for Mechanisms in the JWST Optical Telescope Element Simulator (OSIM) |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160000785 |
| 著者（英） | Kirk, Jeffrey; Eichhorn, William; Anderjaska, Thomas; Guishard, Corina; Leviton, Douglas B.; Kadari, Madhu; Garza, Mario; Capon, Tom; Nyquist, Richard; Haghani, Shadan; Haney, Paul; Hakun, Claef; Wilson, Erin; Davis, CLinton; Sullivan, Joseph; Happs, David; Badger, James; Hovmand, Lars; Dicks, Brent; Robinson, F. David |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2013-08-25 |
| 言語 | eng |
| 内容記述 | The JWST Optical Telescope Element Simulator (OSIM) is a configurable, cryogenic, optical stimulus for high fidelity ground characterization and calibration of JWST's flight instruments. OSIM and its associated Beam Image Analyzer (BIA) contain several ultra-precise, cryogenic mechanisms that enable OSIM to project point sources into the instruments according to the same optical prescription as the flight telescope images stars - correct in focal surface position and chief ray angle. OSIM's and BIA's fifteen axes of mechanisms navigate according to redundant, cryogenic, absolute, optical encoders - 32 in all operating at or below 100 K. OSIM's encoder subsystem, the engineering challenges met in its development, and the encoders' sub-micron and sub-arcsecond performance are discussed. |
| NASA分類 | Optics |
| レポートNO | GSFC-500-13-D-0264 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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