Optical sight assembly

Details Optical sight assembly Optical sight assembly

1993-06-08

1996-08-20

Nguyen, Thong Q.

Optical: systems and elements

Compound lens system

Variable magnification

359421, 359422, G02B 2300

Patent

active

055484425

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 et al.
patent: 3624400 (1971-11-01), Cohen
patent: 3826571 (1974-07-01), Spence-Bate
patent: 4119364 (1978-10-01), Takahashi
patent: 4274092 (1981-06-01), Vonusa et al.
patent: 4307940 (1981-12-01), Hagedorn-Olsen
patent: 4567478 (1986-01-01), Schwab
patent: 4740064 (1988-04-01), Kono et al.
patent: 4961636 (1990-10-01), Gaul et al.

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