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Proceedings Paper

Step-zoom dual-field-of-view IR telescope
Author(s): Muhammad Nadeem Akram; Muhammad Hammad Asghar
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Paper Abstract

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.

Paper Details

Date Published: 23 December 2002
PDF: 6 pages
Proc. SPIE 4832, International Optical Design Conference 2002, (23 December 2002); doi: 10.1117/12.486458
Show Author Affiliations
Muhammad Nadeem Akram, Royal Institute of Technology (Sweden)
Muhammad Hammad Asghar, Advanced Engineering Research Organization (Pakistan)


Published in SPIE Proceedings Vol. 4832:
International Optical Design Conference 2002
Paul K. Manhart; Jose M. Sasian, Editor(s)

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