Optical Design Of An All-Reflecting, High Resolution Camera For Active-Optics On Ground-Based Telescopes

E. H. Richardson; C. L. Morbey

doi:10.1117/12.948989

16 January 1986 Optical Design Of An All-Reflecting, High Resolution Camera For Active-Optics On Ground-Based Telescopes

E. H. Richardson, C. L. Morbey

Author Affiliations +

Proceedings Volume 0551, Adaptive Optics; (1986) https://doi.org/10.1117/12.948989
Event: 1985 Technical Symposium East, 1985, Arlington, United States

Abstract

"Seeing" effects of the Earth's atmosphere cause motion and blur of stellar images produced by ground-based telescopes. In order to sharpen the images over long exposures it is necessary to add a camera which produces an image of the pupil, i.e. of the primary mirror, followed by the reimaged field of stars. A vital feature of such a camera is the provision for analyzing the imperfections of the image of a guide star at the center of the field. Any movement of the guide star in excess of a small threshold is sensed and corrected by feedback to an active mirror located at the pupil. Small, rapid motions of the active mirror sharpen both the guide star and the nearby images that lie within the "aplanatic patch" where seeing effects are correlated with those of the guide star. The aplanatic patch covers a field of about 2.5 arcmin at most. Usually, some magnification of the images is required to match the pixel size of the detector. Optical designs are given of cameras optimized for use at the secondary foci of two different telescopes: the 3.6 meter Canada-France-Hawaii Telescope (CFHT), which has classical optics (paraboloidal primary); and the 2.2 metre University of Hawaii telescope, which has Ritchey-Chretien optics (hyperboloidal primary). Absorption in the infrared is avoided by using only mirrors in the cameras.

Citation Download Citation

E. H. Richardson and C. L. Morbey "Optical Design Of An All-Reflecting, High Resolution Camera For Active-Optics On Ground-Based Telescopes", Proc. SPIE 0551, Adaptive Optics, (16 January 1986); https://doi.org/10.1117/12.948989

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Mirrors

Telescopes

Cameras

Stars

Disk lasers

Sensors

Monochromatic aberrations

Show All Keywords

Keywords/Phrases

Search In:

Publication Years