Tolerancing of Wide-Field/Planetary Camera-II

James P. McGuire Jr.; Robert P. Korechoff

doi:10.1117/12.164977

7 December 1993 Tolerancing of Wide-Field/Planetary Camera-II

James P. McGuire Jr., Robert P. Korechoff

Proceedings Volume 1993, Quality and Reliability for Optical Systems; (1993) https://doi.org/10.1117/12.164977
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The second generation Wide-Field/Planetary Camera (WF/PC-II) for the Hubble Space Telescope (HST) was modeled to access the impact of manufacturing, alignment, and environmental tolerances on performance. This analysis showed that the lateral registration of the image of the Optical Telescope Assembly (OTA) pupil to the surface providing the spherical correction must be aligned and maintained through launch to 50 microns; WF/PC-I was an order of magnitude less sensitive. Inherited WF/PC-I hardware was subjected to new WF/PC-II environmental tests. As a result WF/PC-II was reconfigured to ensure on-orbit performance: the focus mechanism was removed to increase stability through launch and on- orbit, and four formerly fixed mirrors were actuated, to provide capability for on-orbit pupil alignment. This paper traces the evolution of the WF/PC-II error budget from its WF/PC-I beginnings to the current configuration.

Citation Download Citation

James P. McGuire Jr. and Robert P. Korechoff "Tolerancing of Wide-Field/Planetary Camera-II", Proc. SPIE 1993, Quality and Reliability for Optical Systems, (7 December 1993); https://doi.org/10.1117/12.164977

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