Patent
1974-12-06
1976-06-29
Corbin, John K.
350 52, G02B 2302
Patent
active
039662985
ABSTRACT:
There is disclosed a sighting device or system, such as a periscope having a gimballed objective lens, which includes means for relaying an optical image off of a gimballed portion of the sighting system to a fixed position eyepiece without incurring an image rotation about the line of sight as the objective is moved. The system includes a prism or V mirror assembly which is pivoted through its apex and which has its pivot axis aligned with but independent of the gimbal axis thereby permitting the gimbal axis to be located in the middle of two optical paths without interferring with either path. The mirror or prism assembly, forms a 90.degree. V cross-section reflector having its axis of rotation aligned with the gimbal axis and perpendicular to the apex line formed by the intersection of its two plane reflecting surfaces. Each mirror preferably makes a 45.degree. angle with the gimbal axis to which the two optical axes are parallel. The reflector assembly is programmed to move at half the angular rate of rotation of the gimballed sight.
REFERENCES:
patent: 621283 (1899-03-01), Pulfrich
patent: 784487 (1905-03-01), Goerz et al.
patent: 1006230 (1911-10-01), Kollmorgen
patent: 2152726 (1939-04-01), Baroni
patent: 2963942 (1960-12-01), Montremy
patent: 3790248 (1974-02-01), Kellow
Corbin John K.
Henry Jon W.
Hughes Aircraft Company
Keaveney D. C.
MacAllister W. H.
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