Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with two or more projected...
Patent
1974-09-05
1976-03-02
Smith, Alfred E.
Optics: measuring and testing
Range or remote distance finding
Triangulation ranging to a point with two or more projected...
350147, 350159, 350175DR, 354195, 356 16, G01C 312
Patent
active
039414760
ABSTRACT:
A system for visually determining the distance to an object includes a lens that is adapted to be sighted upon an object, said lens being divided equally in a first direction with each half covered by polarizing masks arranged at right angles to each other, a flat light transmission analyzer positioned in the vicinity of the focal plane of the lens and dividing the field of view thereof in a second direction displaced 90.degree. with respect to said first direction, each half of the analyzer being covered by polarizing elements arranged at right angles to each other, and calibrated means to indicate the relative position of adjustment of the lens and analyzer when the observed images at the opposite sides of the divided field of view are in coincidence.
REFERENCES:
patent: 2390652 (1945-12-01), Ives
patent: 2412074 (1946-12-01), Benford
patent: 3520592 (1970-07-01), Leib et al.
Bodenstein George E.
Burton Lockwood D.
Evans F. L.
Honeywell Inc.
Smith Alfred E.
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