Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

Donald G. Bruns; Todd K. Barrett; Timothy J. Brinkley; Domingo Goyena; David G. Sandler; Hubert M. Martin; Guido Brusa; James Roger P. Angel

doi:10.1117/12.290145

17 October 1997 Final prototype design for the adaptive secondary mirror of the 6.5-m MMT

Donald G. Bruns, Todd K. Barrett, Timothy J. Brinkley, Domingo Goyena, David G. Sandler, Hubert M. Martin, Guido Brusa, James Roger P. Angel

Author Affiliations +

Proceedings Volume 3126, Adaptive Optics and Applications; (1997) https://doi.org/10.1117/12.290145
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The upgraded 6.5 m MMT in Arizona will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred voice coil actuators installed in an aluminum reference surface deform the shell according to commands from a wavefront sensor. Capacitor position sensors surrounding each actuator provide feedback in an inner servo loop, much faster than the exterior wavefront sensor control bandwidth. A 60 actuator prototype, nearly identical to the final adaptive secondary size, has been built and is currently being tested.

Citation Download Citation

Donald G. Bruns, Todd K. Barrett, Timothy J. Brinkley, Domingo Goyena, David G. Sandler, Hubert M. Martin, Guido Brusa, and James Roger P. Angel "Final prototype design for the adaptive secondary mirror of the 6.5-m MMT", Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); https://doi.org/10.1117/12.290145

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