6 May 1989 Diffractive Optics For Broadband Infrared Imagers: Design Examples
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Abstract
Two optical designs for infrared imagers, a fast (F/1) staring system and a slower (F/2.4) scanning system, are discussed to demonstrate the advantages and limitations of using hybrid diffractive/refractive elements as replacements for conventional elements. Each case is compared to a conventional design of all spherical elements satisfying a specific set of hypothetical requirements for resolution, field-of-view, and spectral bandwidth (8-12 μm). We find that as much as a 33 percent reduction in the number of elements can be achieved in the slower system using hybrid elements. For the fast system, spherochromatism greatly limits the performance of the hybrid design. A table is presented showing the trades among F-number, field-of-view, bandwidth, and materials needed to maintain constant resolution in the fast system.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Teresa A. Fritz, Teresa A. Fritz, J. Allen Cox, J. Allen Cox, } "Diffractive Optics For Broadband Infrared Imagers: Design Examples", Proc. SPIE 1052, Holographic Optics: Optically and Computer Generated, (6 May 1989); doi: 10.1117/12.951483; https://doi.org/10.1117/12.951483
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