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Proceedings Paper

Extended-range near-infrared image intensifier
Author(s): Joseph Lindmayer; David McGuire
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Paper Abstract

A class of stimulable phosphors, called electron trapping (ETTM) materials, have been developed that are responsive in the infrared. When the ET materials have been prepumped with short wavelength visible light and subsequently exposed to infrared, a visible orange to red wavelength is produced. Such an emission is readily detected by an image intensifier and offers an inexpensive method for extending the sensitivity range of image intensifier photocathodes, such as S-25. The infrared sensitivity range is from 0.8 ,um to 1.6gm, and the response time is on the order of tens of nanoseconds. A hand-held infrared viewer (called a NIRSCOPETM) has been constructed by mating the IR-stimulable phosphor with an image intensifier. The specific applications where the NIRSCOPE is useful are those involved with the imaging of near-JR emitting objects or imaging scenes in a dark environment. These include the following: o Imaging the emission output of laser diodes. o Detection of JR leakage from damaged fiber optic cables. o Imaging of near-JR laser targeting and ranging. o Alignment of optical bench components for near-JR propagation. o Dark room viewer for film processing.

Paper Details

Date Published: 1 July 1990
PDF: 7 pages
Proc. SPIE 1243, Electron Image Tubes and Image Intensifiers, (1 July 1990); doi: 10.1117/12.19470
Show Author Affiliations
Joseph Lindmayer, Quantex Corp. (United States)
David McGuire, Quantex Corp. (United States)

Published in SPIE Proceedings Vol. 1243:
Electron Image Tubes and Image Intensifiers
Illes P. Csorba, Editor(s)

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