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Proceedings Paper

Position Sensitivity Of MAMA Detectors
Author(s): J. S. Morgan; D. S. Slater; J. G. Timothy; E. B. Jenkins
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Paper Abstract

We report on the results of laboratory and telescopic measurements of the position sensitivity of a visible MAMA. detector utilizing a "coarse-fine" array. We also report on the photometric accuracy of this detector under the condi-tion of point source illumination. The detector measured uses a bialkalai photocathode and has 25 μm2 pixels in a 256 x 1024 format. It was illuminated with a 3.5 pm spot of light (FWHM) which was moved across the detector in 1 μm increments. It is found that computed centroid positions are accurate across the entire array to within 0.04 pixels. For the extreme case of illumination with a delta function source, this detector experienced photometric errors of 10-15%. Both the position sensitivity and the photometric accuracy with point source illumination are limited in this detector by errors in the flat field corrections caused by the presence of cross-coupling between adjacent pixels. Initial measurements with a MAMA detector utilizing a "fine-fine" array indicate that this cross-coupling has been eliminated in the most recent versions of the detector.

Paper Details

Date Published: 16 August 1988
PDF: 10 pages
Proc. SPIE 0932, Ultraviolet Technology II, (16 August 1988); doi: 10.1117/12.946895
Show Author Affiliations
J. S. Morgan, Stanford University (United States)
D. S. Slater, Stanford University (United States)
J. G. Timothy, Stanford University (United States)
E. B. Jenkins, Stanford University (United States)


Published in SPIE Proceedings Vol. 0932:
Ultraviolet Technology II
Robert E. Huffman, Editor(s)

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