Optical system for determining the position of a cursor

Details Optical system for determining the position of a cursor Optical system for determining the position of a cursor

1981-12-22

1986-02-04

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350 65, 350 69, 350 691, 350100, 356141, 356152, G01C 310, G01B 1126, G02B 2717

Patent

active

045681821

ABSTRACT:
In an optical digitizer, a cursor is movable on a plane surface having coordinate axis. The cursor includes a source of light that is scanned across the coordinate system, and a detector receiving light from the angle to which the beam is instantaneously directed. The coordinate system has curved mirrors at the origin and point spaced from the origin along the axis thereof, and plane mirrors extending along the axis. A calculator determines the position of the cursor in the coordinate system by triangulation. Alternatively, the cursor may be a curved mirror, with rotating light sources and detectors positioned at determined points in the coordinate system.

REFERENCES:
patent: 3278753 (1966-10-01), Pitts et al.
patent: 3603691 (1971-09-01), Hamilton
patent: 3610755 (1971-10-01), Wieberger et al.
patent: 3788748 (1974-01-01), Knight et al.
patent: 3898445 (1975-08-01), MacLeod et al.
patent: 3923402 (1975-12-01), Turcotte
patent: 4143400 (1979-03-01), Heckman et al.

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