Optical encoding method and device

Details Optical encoding method and device Optical encoding method and device

1990-09-17

1992-02-04

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

250566, 340710, G08C 2100, G01V 904

Patent

active

050861972

ABSTRACT:
An optical encoding means and device for magnifying, condensing, and encoding displacement information relative to an compound grid image sensed by a Photo Sensor Array. The device comprises a specific Grid Pad defined by vertical-horizontal coordinate lines along a plane and in a uniform color. The coordinate lines on the Grid Pad are magnified optically, and are then condensed along a horizontal and vertical axis by means of condenser lenses or reflective mirrors. The condensed image is projected on vertically and horizontally arranged Photo Sensors, and X-axial and Y-axial displacement information is generated by the Photo Sensor Array.

REFERENCES:
patent: 4751380 (1988-06-01), Victor et al.
patent: 4880967 (1989-11-01), Fong et al.

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