Design of 10x uncooled thermal infrared zoom optical system

Da Mu; Yu-nan Du; Shi-long Mi; Yan-chi Guo

doi:10.1117/12.2033229

11 September 2013 Design of 10^x uncooled thermal infrared zoom optical system

Da Mu, Yu-nan Du, Shi-long Mi, Yan-chi Guo

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 890733 (2013) https://doi.org/10.1117/12.2033229
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

For 320x240 pixel² uncooled focal plane array detector, an infrared continuous zoom optical system of 10^x zoom ratio for long-wavelength is designed in this paper. This system can be applied in joint transform correlator and other infrared tracing systems. The spectral band of the system is 8μm~12μm, the focal length is 20mm ~200mm , and the F number of the system is 2. The relative aperture is invariant during the zoom process, and the variable magnification curve and compensation curve are smooth as well. The system only consists of 7 lenses and one aspherical surface. The results have shown that when the maximum spatial frequency is 17lp/mm, the MTF(Modulation Transfer Function) curves in the whole range of focal length are all above 0.5 which are closed to diffraction limited curve. The stability of image plane is well, and the imaging quality is perfect, which show that the system meets the requirement of technical specification.

Citation Download Citation

Da Mu, Yu-nan Du, Shi-long Mi, and Yan-chi Guo "Design of 10^x uncooled thermal infrared zoom optical system", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 890733 (11 September 2013); https://doi.org/10.1117/12.2033229

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