The U.T. ELECTROGRAPHIC Camera: A Powerful Detector For Ground Based And Space Astronomy Description And Astronomical Performance

Paul J. Griboval

doi:10.1117/12.957101

3 May 1979 The U.T. ELECTROGRAPHIC Camera: A Powerful Detector For Ground Based And Space Astronomy Description And Astronomical Performance

Paul J. Griboval

Author Affiliations +

Proceedings Volume 0172, Instrumentation in Astronomy III; (1979) https://doi.org/10.1117/12.957101
Event: Instrumentation in Astronomy, 1979, Tucson, United States

Abstract

The U.T. Electrographic camera is the result of nearly 12 years of research undertaken to produce a high resolution and sensitivity detector for astronomy, yet reliable and easy and fast to operate. The Mark II experimental camera has a 5 cm useful field diameter and is equipped with a Cs₃Sb(0) photocathode with typical Q.E. of 15% at 430 nm. The highly corrected magnetic and electric fields produce sharp focus on the entire field with no image distortion. An aluminized thin plastic foil, which comes in intimate contact with the emulsion, prevents photocathode poisonning during the exposure. The camera is operated at accelerating voltages up to 60 kV with no detectable background in a 2 hour exposure. The design permits fast loading and unloading. The camera is being tested extensively at the F/13.5 cassegrain focus of the McDonald Observatory 0.76 m telescope and hundreds of excellent electrographs have been obtained under routine conditions. The high resolution and photocathode Q.E. permitted recording more rapidly and accurately the telescopic images of various astronomical objects. Testing will be continued until enough information is gained for designing and building, upon adequate support, a large field electrographic ca-mera with a roll film magazine and a higher Q.E. photocathode for both ground based and space telescopes.

Citation Download Citation

Paul J. Griboval "The U.T. ELECTROGRAPHIC Camera: A Powerful Detector For Ground Based And Space Astronomy Description And Astronomical Performance", Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); https://doi.org/10.1117/12.957101

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