Cryogenic deformable mirror technology development

Maureen L. Mulvihill; Michael E. Roche; Jeffrey L. Cavaco; Ryan J. Shawgo; Zaffir A. Chaudhry; Mark A. Ealey

doi:10.1117/12.506269

15 October 2003 Cryogenic deformable mirror technology development

Maureen L. Mulvihill, Michael E. Roche, Jeffrey L. Cavaco, Ryan J. Shawgo, Zaffir A. Chaudhry, Mark A. Ealey

Proceedings Volume 5172, Cryogenic Optical Systems and Instruments X; (2003) https://doi.org/10.1117/12.506269
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Xinetics is working with NASA to develop a cryogenic deformable mirror (DM) specific to the needs of future Origins Program missions such as TPF and JWST. Of utmost importance was the development of an electroceramic material that exhibited electrostrictive properties at cryogenic temperatures. In this paper, the actuator developmental tests and subsequent cryogenic deformable mirror design and cryogenic testing performance of the 349-channel discrete actuator deformable mirror demonstrator are discussed. The cofired actuator stroke response was nearly constant from 35 to 65 K such that at 150V the actuator free-stroke was ~3 microns. The 349-ch cryogenic DM was designed and built with as few parts and materials as possible to minimize the CTE mismatch. The polished mirror was cycled twice from 300 to 35 K. The rms surface figure was monitored using a Zygo interferometer on cooling and consistent data was measured during both temperature cycles. The figure changed from 0.5 waves (P-V) at 300 K to 5 waves at 35 K and returned to 0.6 waves at 300K. The actuators were powered and the influence functions were measured between 35 and 65 K. Even though it is not a functional DM at 35 K, it is a substantial step forward in the development of a cryogenic deformable mirror technology.

Citation Download Citation

Maureen L. Mulvihill, Michael E. Roche, Jeffrey L. Cavaco, Ryan J. Shawgo, Zaffir A. Chaudhry, and Mark A. Ealey "Cryogenic deformable mirror technology development", Proc. SPIE 5172, Cryogenic Optical Systems and Instruments X, (15 October 2003); https://doi.org/10.1117/12.506269

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available