Transparent sheet-like pad with reflective grid layer to provide

Details Transparent sheet-like pad with reflective grid layer to provide Transparent sheet-like pad with reflective grid layer to provide

1990-10-25

1991-12-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250221, 340710, G06K 500, G06K 1100

Patent

active

050755587

ABSTRACT:
A sheet-like pad having a grid pattern constituted by X-axis grid lines and Y-axis grid lines perpendicular to the X-axis grid lines, and adapted to be placed between a document and an optical reader of a type which comprises an optical scanner for scanning the document to read an image on the document while the document is radiated with first rays of light emitted therefrom and a position sensor for reading the grid pattern for locating the position of the optical reader on the document while the document is radiated with second rays of light emitted therefrom. The sheet-like pad comprises a film-like base having upper and lower surfaces opposite to each other, reflective layers formed on the upper surface of the base for periodically reflecting the second rays of light in first and second directions perpendicular to each other, and a protective layer formed on the upper surface of the base so as to overlay the reflective layers. Each of the base and the protective layer is made of material capable of passing therethrough both of the first and second rays of light.

REFERENCES:
patent: 4260979 (1981-04-01), Smith
patent: 4409479 (1983-10-01), Sprague et al.
patent: 4686329 (1987-08-01), Joyce
patent: 4751380 (1988-06-01), Victor et al.
patent: 4799054 (1989-01-01), House
patent: 4834502 (1989-05-01), Bristol et al.
patent: 4920260 (1990-04-01), Victor et al.
patent: 4942621 (1990-07-01), Angwin
patent: 4984287 (1991-01-01), Massoudi

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