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Proceedings Paper

Considerations For The Design And Evaluation Of Objective Lenses For Low Light Level Applications
Author(s): M. W. McDowell; E. van Rooyen; L. Dicks; A. J. Boettcher
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Paper Abstract

The observation of objects under low illumination conditions is made possible using photo-electronic image intensification of the available light. The intensifier is normally used in conjunction with a large aperture objective lens so as to gather the maximum number of photons. These photons are then imaged onto the photocathode and after electronic amplification the reconstituted optical image can be viewed at the phosphor by means of an eyepiece. At present the limitation of passive night vision devices is the inadequate spatial frequency response of the image intensifier.

Paper Details

Date Published: 1 March 1974
PDF: 12 pages
Proc. SPIE 0042, Image Intensifiers: Technology, Performance, Requirements, and Applications, (1 March 1974); doi: 10.1117/12.953865
Show Author Affiliations
M. W. McDowell, South African Council for Scientific and Industrial Research (South Africa)
E. van Rooyen, South African Council for Scientific and Industrial Research (South Africa)
L. Dicks, South African Council for Scientific and Industrial Research (South Africa)
A. J. Boettcher, South African Council for Scientific and Industrial Research (South Africa)


Published in SPIE Proceedings Vol. 0042:
Image Intensifiers: Technology, Performance, Requirements, and Applications

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