Optical scanner including position sensors

Details Optical scanner including position sensors Optical scanner including position sensors

1986-07-23

1989-01-10

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358293, 382 59, G01V 904

Patent

active

047975440

ABSTRACT:
An optical scanning device (14) receives information from a page (11) of printed text (12) via an electrooptical transducer (16) and uses that information to fill a bit map in a memory device (102). In order to track the location of the optical scanner relative to the printed page, thus facilitating entry of information into the bit map, an optical mouse (19) is included in the scanner. In accordance with another embodiment of this invention, two optical mice (19, 150) are provided on the scanner (148) to indicate not only the position of the scanner relative to the page but also the angle that the scanner is held at relative to the page. The scanner can be used in conjunction with an optical character recognition device, a photocopying device, or any of a number of other devices. In accordance with another embodiment of this invention, indicia of location (210) are placed either on a transparent sheet or a mechanical constraint (200). A set of sensors (208) on an optical scanner (202) are adapted to sense this indicia but the sensors are spaced differently from the indicia, therefore indicating movement with very fine resolution.

REFERENCES:
patent: 4581657 (1986-04-01), Takano
patent: 4581761 (1986-04-01), Ichinokawa et al.
patent: 4620233 (1986-10-01), Ogawa et al.
patent: 4647771 (1987-03-01), Kato
patent: 4677494 (1987-01-01), Sue
patent: 4684998 (1987-08-01), Tanioka et al.
patent: 4686329 (1987-08-01), Joyce

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