Optics: measuring and testing – Fiducial instruments
Patent
1983-09-22
1986-06-03
Kittle, John E.
Optics: measuring and testing
Fiducial instruments
89 4106, 350174, 356141, 356252, 356253, 356254, 356255, G02B 2700, G02B 2300, G02B 2310, F41B 100
Patent
active
045926549
ABSTRACT:
A sight such as a gunsight for a helicopter comprises a movable assembly including a reticle generator and a single optical component which is both semireflecting and capable of collimating the image of the reticle. The movable assembly is driven by drive means under servo control to superpose the image of the reticle at an aiming point on a landscape. The aiming point may be computed to make corrections for the behaviour of a ballistic weapon. The single optical component may comprise a hologram physically in the shape of a portion of a surface of a sphere, but acting optically like a portion of the surface of a paraboloid. The optical component may be fixed to the reticle generator by mechanical fixing means which mask the field of view around the optical component very little.
REFERENCES:
patent: 3582178 (1971-06-01), Boughton
patent: 3671100 (1972-06-01), Bushman et al.
patent: 3672782 (1972-06-01), Akin Jr.
patent: 3936137 (1976-02-01), Litman
patent: 3940204 (1976-02-01), Withrington
patent: 4199257 (1980-04-01), Dosch et al.
patent: 4261647 (1981-04-01), Ellis
Gauthier Francois H.
Girault Herve
Thomasson Daniel
"Thomson-CSF"
Kittle John E.
Shah Mukund J.
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