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Proceedings Paper

A 40 Mn Photon Counting Camera
Author(s): A. Blazit
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Paper Abstract

We are developping a 40 mm photocathode photon counting camera for astronomical use, mainly stellar interferometry and multislit spectroscopy. Light intensification is performed by a stack of two image intensifiers; the first, a 1st generation one, provides the resolution, the quantum efficiency and the peak shaped pulse amplitude distribution. It is followed by a microchannel one which provides most of the gain. Readout of the intensified image is achieved by 4 CCD cameras (288 x 384 pixels each). They are coupled to the intensifier stack with a fiber optic reducer and 4 fiber optic cylinders to split the image in 4 quadrants. The video signals of the CCDs are digitized and 4 wired processors compute on line the photocenter of each event with an accuracy of 1/4 CCD pixel. This provides a total image sampling of 3072 x 2304 pixels, their size beeing 13 x 13 μm in the input photocathode plane. Coordinates of the centers of the events are sent to a VME bus based microcomputer that performs preproing and storage of the information.

Paper Details

Date Published: 18 May 1987
PDF: 6 pages
Proc. SPIE 0702, International Topical Meeting on Image Detection and Quality, (18 May 1987); doi: 10.1117/12.966772
Show Author Affiliations
A. Blazit, Centre d' Etudes et de Recherches Geodynamiques et Astronomiques (France)

Published in SPIE Proceedings Vol. 0702:
International Topical Meeting on Image Detection and Quality
Lucien F. Guyot, Editor(s)

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