Low Light Level Imaging Design,
Abstract
Low-light-level imaging design involves evaluation of a number of variables that affect overall gain. Most systems include an image intensifier and some sort of recording device, such as film, a CCD array, or a TV camera. A list of factors that should be considered in design includes (though may not be limited to) input lens speed, filter transmission, spectral response of image intensifier, image intensifier gain, output phosphor spectral distribution, relay lens speed or fibre optics transmission, film speed (if used) or CCD or TV camera characteristics such as spectral response, sensitivity, and integration capability. One normally has to rely on manufacturers' technical data for many of the above parameters, and these are often quoted in inconvenient or unfamiliar photometric units, often at an unspecified resolution. As a result, quoted gains or sensitivities of electro-optical devices may bear little relation to the specific problem being considered. The purpose of this Report is to illustrate design calculations for a typical LLL imaging system that might be used in auroral or airglow research, and to provide appropriate explanations and definitions of the physical units one encounters in such calculations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1982
- Accession Number
- ADA124283
Entities
People
- R. H. Eather