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1 January 1991 Thermal compensation of infrared achromatic objectives with three optical materials
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Proceedings Volume 1354, 1990 Intl Lens Design Conf; (1991) https://doi.org/10.1117/12.47933
Event: 1990 International Lens Design Conference, 1990, Monterey, CA, United States
Abstract
Often it is not possible to fix pairs of infrared refractive materials in the γv-v diagram to design achromatic doublets with focal distance thermal change, matching the expansion of the focal plane supporting structure. The problem can be solved with three refractive materials if they form a finite area triangle in the γV-V diagram. We derive formulas for the calculation of the power of the elements that include both the doublet and the triplet solutions.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Juan L. Rayces and Lan Lebich "Thermal compensation of infrared achromatic objectives with three optical materials", Proc. SPIE 1354, 1990 Intl Lens Design Conf, (1 January 1991); https://doi.org/10.1117/12.47933
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