Optical scanner producing multiple scan patterns

Details Optical scanner producing multiple scan patterns Optical scanner producing multiple scan patterns

1989-12-08

1990-10-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235467, 350 691, H01J 314

Patent

active

049670760

ABSTRACT:
An optical scanning unit for scanning a bar code includes a plurality of rotatably mounted pattern forming mirrors which are rotated during a single revolution of a drive shaft to generate a plurality of successively larger scan patterns. Each of the mirrors includes a cam portion which is engaged by a roll member driven by a disk member which in turn is rotated by the drive shaft. Biasing members return the mirrors to their home position at the completion of one revolution of the drive member.

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