Objective operating in the infrared

Details Objective operating in the infrared Objective operating in the infrared

2006-10-03

2008-12-09

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000, C359S350000

Reexamination Certificate

active

07463432

ABSTRACT:
An objective for use in a night sight device has a front lens group and a rear lens group. The lenses of the front lens group have essentially equal diameters, whereas the lenses of the rear lens group have increasingly large diameters starting from the front end of the lens group.

REFERENCES:
patent: 2846923 (1958-08-01), Tronnier
patent: 5321554 (1994-06-01), Ishiyama et al.
patent: 5434704 (1995-07-01), Connors et al.
patent: 6147815 (2000-11-01), Fujie
patent: 2002/0048080 (2002-04-01), Nagatoshi et al.
patent: 1103616 (1961-03-01), None
patent: 2032131 (1970-11-01), None
patent: 1388546 (1975-03-01), None
patent: 2141556 (1984-12-01), None

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