Optical viewing system

Details Optical viewing system Optical viewing system

1986-10-16

1988-08-16

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

With magnetic compass

33364, 33348, 33334, G01C 2300

Patent

active

047634197

ABSTRACT:
There is provided an optical viewing system, which is preferably a compass which eliminates the parallax and sighting problems of prior art optical systems. The compass includes a beam splitter which displays a sighted image both on a reference screen and a free-floating magnetized sphere or other moving surface. The sighted image on the reference screen and on the sphere are superimposed upon each other when viewed through one facet of the beam splitter. In this manner parallax is eliminated, thus the direction and elevation of the image may be readily and accurately determined.

REFERENCES:
patent: 811777 (1906-02-01), Konig
patent: 1705146 (1929-03-01), Willson
patent: 2022516 (1935-11-01), Owen
patent: 3423051 (1969-01-01), Jakab
patent: 3527523 (1970-09-01), Travis
patent: 4402140 (1983-09-01), Nagae

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