1 April 1981 Thermo-Optical Analysis Of Two Long-Focal-Length Aerial Reconnaissance Lenses
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A 36-inch f/5.0 lens and a 24-inch f/3.5 lens used for aerial reconnaissance missions are described. During design, these lenses were analyzed over t heir full operating temperautre range of 20 to 60 C. Their performance at ambient conditions and at the maximum operating temperature is reported. The results indicate that at steady state the performance of each lens is affeted only modestly over the operating temperature range when the image is held in focus by a thermal comensating lens mount.
Irwin Friedman, "Thermo-Optical Analysis Of Two Long-Focal-Length Aerial Reconnaissance Lenses," Optical Engineering 20(2), 202161 (1 April 1981). https://doi.org/10.1117/12.7972684 . Submission:

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