10 September 1987 Measurement Of Magnification Of IR Telescopes
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Proceedings Volume 0807, Passive Infrared Systems and Technology; (1987) https://doi.org/10.1117/12.941447
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands
The measurement of the magnification factor of infra-red or thermal band afocal telescopes to high accuracy may not be as easy as it might at first seem. One may need to carry out this measurement to an accuracy of 1% or better for systems, for example, where dual band overlay is required (eg a thermal display superimposed on the same scene viewed in the visual band). This paper describes some of the methods and experiments that we have carried out in an attempt to measure magnification to a target accuracy of 0.1%. These are for telescopes designed for a scanning thermal imaging system working in the 8-12um spectral region. Measurements are presented here only for a nominal X3 telescope, but in addition we have made measurements on others of larger magnification.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J Peter Jennings, J Peter Jennings, F J Busselle, F J Busselle, Clive R Foster, Clive R Foster, Sarah Rose, Sarah Rose, Steven G Shaw, Steven G Shaw, "Measurement Of Magnification Of IR Telescopes", Proc. SPIE 0807, Passive Infrared Systems and Technology, (10 September 1987); doi: 10.1117/12.941447; https://doi.org/10.1117/12.941447


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