04734565 is referenced by 99 patents and cites 1 patents.

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.

Title
Read-only optical card and system
Application Number
541166
Publication Number
4734565
Application Date
May 6, 1987
Publication Date
March 29, 1988
Inventor
James L Buxton
East Palo Alto
CA, US
Gerald A Pierce
Redwood City
CA, US
Agent
Thomas Schneck
Assignee
Drexler Technology Corporation
CA, US
IPC
G06K 7/10
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