Image improvement of CFHT's primary mirror: primary mirror cooling

Edward G. Stokes; Rohendra Dulip Atapattu; Rod Hendrix

doi:10.1117/12.211457

8 June 1995 Image improvement of CFHT's primary mirror: primary mirror cooling

Edward G. Stokes, Rohendra Dulip Atapattu, Rod Hendrix

Proceedings Volume 2479, Telescope Control Systems; (1995) https://doi.org/10.1117/12.211457
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The Canada-France-Hawaii-Telescope is in the process of upgrading the primary mirror cell for cooling of the mirror during non-operating hours. This paper addresses the goals of CFHT in insulating and actively cooling the primary mirror cell environment. The main design criteria is to have a system that would introduce chilled dry air to a sealed and insulated primary mirror cell during daylight hours. This could remove the deleterious effects of having the primary mirror warmer than the ambient air. A system is planned to protect the mirror in case of sudden moisture exposure and also decrease the frequency of recoating due to contamination.

Citation Download Citation

Edward G. Stokes, Rohendra Dulip Atapattu, and Rod Hendrix "Image improvement of CFHT's primary mirror: primary mirror cooling", Proc. SPIE 2479, Telescope Control Systems, (8 June 1995); https://doi.org/10.1117/12.211457

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