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Proceedings Paper

Improvement of UV on/off ratios of a gated ICCD by simultaneously gating the MCP
Author(s): Stephen Hamilton; Emer Conroy
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Paper Abstract

Gated image intensifiers (Gen II) have been quoted in the past of having On/Off, or rejection ratios, of 107. In this paper we investigate the relationship of the On/Off ratio with incident wavelength. The data shows that the On/Off ratio can vary by as much as 102 with values of only 104 at ~200nm for a given image intensifier. This low On/Off ratio can limit the sensitivity of an Intensified CCD camera under certain conditions where there is an abundance of UV, such as spectral imaging in combustion research. This is particularly true in situations where the CCD exposure and readout times, typically milliseconds, take much longer than the required 'On' time of the photocathode, which is typically nanoseconds. Test data also shows the advantage of switching the MCP On and Off simultaneously with the photocathode, which brings the rejection ratios up to >108.

Paper Details

Date Published: 27 August 2003
PDF: 8 pages
Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.463950
Show Author Affiliations
Stephen Hamilton, Andor Technology Ltd. (United Kingdom)
Emer Conroy, Andor Technology Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 4876:
Opto-Ireland 2002: Optics and Photonics Technologies and Applications
Vincent Toal; Norman Douglas McMillan; Gerard M. O'Connor; Eon O'Mongain; Austin F. Duke; John F. Donegan; James A. McLaughlin; Brian D. MacCraith; Werner J. Blau, Editor(s)

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