Optical sight assembly

Details Optical sight assembly Optical sight assembly

1996-05-21

1997-11-25

Nguyen, Thong

Optical: systems and elements

Compound lens system

Variable magnification

359421, 359422, G02B 2300

Patent

active

056918429

ABSTRACT:
An optical assembly (10) includes a first plurality of optical elements (14) providing the viewer a first field of view and a second plurality of optical elements (18) that, when moved into the optical path (16), provides the viewer with a second field of view. A support structure (36) for the second plurality of optical elements (18) includes a permanent magnet (64) that is disposed to cause a switch (66) located on the housing (12) of the optical assembly (10) to close. The changing of the position of the switch (66) results in a signal being provided to identify to the viewer which field of view is being presented by the assembly (10).

REFERENCES:
patent: 3572886 (1971-03-01), Curtiss
patent: 4961636 (1990-10-01), Gaul et al.
patent: 5548442 (1996-08-01), Devenyi et al.

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