Dual field of view afocal

Details Dual field of view afocal Dual field of view afocal

1998-05-28

1999-08-03

Nguyen, Thong

Optical: systems and elements

Having significant infrared or ultraviolet property

Lens, lens system or component

359355, 359796, G02B 1314

Patent

active

059332727

ABSTRACT:
An infrared afocal lens assembly for providing an observed magnified IR ie scene with a field of view and a substantially less temperature dependent performance. The assembly includes a collecting lens, focusing lens subassembly, an intermediate focal plane, an eyepiece lens subassembly, and an aperture stop. A wide field of view lens subassembly may be used about the focusing lens subassembly. All lenses are made of either GaAs or ZnS, and all lenses are either single lens or doublets.

REFERENCES:
patent: 4479695 (1984-10-01), Neil
patent: 5504628 (1996-04-01), Borchard

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