Optical information reading apparatus

Details Optical information reading apparatus Optical information reading apparatus

1991-06-10

1993-10-12

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235470, 235472, G06K 710

Patent

active

052528162

ABSTRACT:
An optical information reading apparatus such as a bar code reader includes a mirror drive unit rotatable to oscillate a movable scanning mirror simultaneously about a first axis and a second axis perpendicular to the first axis so that a laser beam irradiated from a laser unit is directed by the movable scanning mirror vertically and horizontally to scan parallel arranged plural rows bar codes with a raster scanning pattern. Since the raster scanning pattern can be formed by the combination of a single scanning mirror and a single mirror drive unit, the optical information reading apparatus is simple in construction and compact in size. In addition, the number of vertical scanning lines is not limited as opposed to a limited number of vertical scanning lines formed a polygon mirror incorporated in the conventional apparatus.

REFERENCES:
patent: 3643068 (1972-02-01), Mohan et al.
patent: 4871904 (1989-10-01), Metlitsky et al.
patent: 4967076 (1990-10-01), Schuhmacher et al.
patent: 5099110 (1992-03-01), Shepard et al.

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