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Optical Engineering

Optical Design Of Thermal Imaging Systems Utilizing Gradient-Index Optical Materials
Author(s): James W. Howard; Danette P. Ryan-Howard
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Paper Abstract

Lens systems used in thermal imaging systems frequently employ aspheric surfaces in order to obtain aberration correction with a minimum number of lenses. The use of infrared-transmitting gradient-index materials is a theoretical alternative method for achieving this aim. Moreover, gradient-index materials can be used in some cases to correct chromatic aberrations, which aspherics cannot correct. A design study has been conducted in which it is shown how the polychromatic optical performance of particular lens systems could be improved by utilizing ZnSe/ZnS axial gradient lenses, and how the performance over the field of view could be improved by utilizing a germanium/ silicon spherical gradient.

Paper Details

Date Published: 1 April 1985
PDF: 4 pages
Opt. Eng. 24(2) 242263 doi: 10.1117/12.7973467
Published in: Optical Engineering Volume 24, Issue 2
Show Author Affiliations
James W. Howard, Honeywell Electro-Optics Division (United States)
Danette P. Ryan-Howard, Northrop Corporation (United States)


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