Diffraction-Limited Imaging With The Coherently Cophased Mmt

E. Keith Hege; Donald W. McCarthy Jr.; J. C. Hebden; Stuart B. Shaklan; Julian C. Christou

doi:10.1117/12.942074

29 January 1988 Diffraction-Limited Imaging With The Coherently Cophased Mmt

E. Keith Hege, Donald W. McCarthy Jr., J. C. Hebden, Stuart B. Shaklan, Julian C. Christou

Proceedings Volume 0828, Digital Image Recovery and Synthesis; (1988) https://doi.org/10.1117/12.942074
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

The 6.86 m Multiple Mirror Telescope (MMT) has been operated as a coherently cophased interferometric imaging array since 1983. PSF observations at wavelengths from 410 to 850 nm reveal characteristics which must be controlled to achieve reliable imaging at resolutions less than 75 nanoradians (0.015 arc seconds). The MMT has been used to acquire differential speckle images of Alpha Orionis in the H-alpha line and a nearby "continuum" bandpass at 656.9 nm. Broadband images of a 12th magnitude geosynchronous communications satellite, from which shape and size measures have been obtained with 100 nm resolution, give evidence of the capability of the MMT in speckle imaging applications. We have recently extended the cophasing capability to infrared wavelengths by providing reflective pathlength compensation capability.

Citation Download Citation

E. Keith Hege, Donald W. McCarthy Jr., J. C. Hebden, Stuart B. Shaklan, and Julian C. Christou "Diffraction-Limited Imaging With The Coherently Cophased Mmt", Proc. SPIE 0828, Digital Image Recovery and Synthesis, (29 January 1988); https://doi.org/10.1117/12.942074

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