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23 December 2002 A step-zoom dual field-of-view IR telescope
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Proceedings Volume 4832, International Optical Design Conference 2002; (2002)
Event: International Optical Design Conference 2002, 2002, Tucson, AZ, United States
In this paper, the design of a dual field-of-view telescope for 8 - 12 μm imaging waveband is described. Preliminary calculations are done to determine the first-order parameters of the narrow and wide-field modes. To achieve a switchable dual field-of-view system, an optical configuration based on the axial motion of a single lens group along the optical axis is used. The same lens is also used for focusing at near objects and for athermalization by very small axial movement. A total of 6 lenses with one conic surface are used in the design making it cost effective and lightweight. The final optical design is presented along with the aberrations curves and the MTF plots showing excellent performance in both field-of-views.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Muhammad Nadeem Akram and Muhammad Hammad Asghar "A step-zoom dual field-of-view IR telescope", Proc. SPIE 4832, International Optical Design Conference 2002, (23 December 2002);


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