Step-zoom dual-field-of-view infrared telescope

Details Step-zoom dual-field-of-view infrared telescope Step-zoom dual-field-of-view infrared telescope

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apopt..42.2312n&link_type=abstract

Applied Optics OT, vol. 42, Issue 13, pp.2312-2316

Physics

Optics

Scientific paper

The design of a dual-field-of-view telescope for an 8 -12- μm imaging waveband is described. Preliminary calculations are made to determine the first-order parameters of the narrow- and the wide-field modes. To achieve a switchable dual-field-of-view system, one uses an optical configuration based on the axial motion of a single lens group along the optical axis. The same lens is also used for focusing at near objects and for athermalization by small axial movement. A total of six lenses with one conic surface are used in the design, making the telescope cost effective and lightweight. The final optical design is presented, along with the aberrations curves and modulation transfer function plots, showing excellent performance in both fields of view.

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