Hand-held image reading apparatus with position tracker

Details Hand-held image reading apparatus with position tracker Hand-held image reading apparatus with position tracker

1986-08-18

1988-08-30

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, 340710, 382 59, G01V 904

Patent

active

047679239

ABSTRACT:
An image reading apparatus includes three two-dimensional position detection mechanisms and an image reading mechanism including a line sensor array. Each two-dimensional position detecting mechanism includes a pair of ball rotation detecting mechanisms perpendicular to each other. The ball rotation detecting mechanisms are arranged that optical detection elements are arranged near discs with slits assembled integrally with rollers in rolling contact with a ball exposed below a lower surface of a bottom surface of a housing. The detection elements detect detecting positions, rotational angle and rotational direction of the balls.

REFERENCES:
patent: 3473157 (1969-10-01), Little et al.
patent: 3502882 (1970-03-01), Von Voros
patent: 3602638 (1971-08-01), Pascoe et al.
patent: 3624283 (1971-11-01), Logan
patent: 4464652 (1984-08-01), Lapson et al.
patent: 4562347 (1985-12-01), Hovey et al.
patent: 4639790 (1987-01-01), Kusaka

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