Optical range finder

Details Optical range finder Optical range finder

1975-10-10

1976-12-28

Corbin, John K.

Optics: measuring and testing

Range or remote distance finding

External basis type

G01C 302

Patent

active

039998533

ABSTRACT:
An optical range finder is described which makes use of a variable length reference line juxtaposed on a view of a distant object whose height, width or other dimension is known. The user varies the reference line until it matches the known dimension. At this point he can read the distance to the object from a scale. The reference line is a magnified image of a slit which is covered or uncovered by the user to change its length. The relation between the motion of the adjusting means and the corresponding change in slit length is a hyperbola. This linearizes the scale to make for easier interpolation of all values of distance.

REFERENCES:
patent: 2189964 (1940-02-01), Sealey
patent: 2423718 (1947-07-01), Morrison
patent: 2734273 (1956-02-01), Blindenbacher et al.
patent: 3409987 (1968-11-01), New
patent: 3907288 (1975-09-01), Hudak

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