| Autor: |
David Happs, Douglas B. Leviton, Brent Dicks, Thomas Anderjaska, Corina Guishard, Lars Hovmand, William L. Eichhorn, Paul G. Haney, Erin Wilson, Mario Garza, F. David Robinson, Tom Capon, Richard Nyquist, Jeffrey R. Kirk, Joe H. Sullivan, James Badger, Shadan Haghani, Madhu Kadari, Claef Hakun, C. R. Davis |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.2024807 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
