Read-only optical card and system

Details Read-only optical card and system Read-only optical card and system

1987-05-06

1988-03-29

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235487, G06K 710

Patent

active

047345659

ABSTRACT:
An optical data read-only card and system using a length of optical recording material in which data in the form of microscopic spots is disposed in cells forming a regularly spaced grid. The spots contrast with the background media with a reflective contrast ratio of at least 1.5 to 1. While the material is being moved in a lengthwise direction by a transport, rows of cells are being read one row at a time by a linear CCD array capable of detecting the contrasting reflectivities between spots and background.

REFERENCES:
patent: 4634850 (1985-11-01), Pierce

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