Automatic incremental focusing scanner system

Details Automatic incremental focusing scanner system Automatic incremental focusing scanner system

1988-10-31

1990-04-24

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710, G06K 714

Patent

active

049202553

ABSTRACT:
An automatic incremental focusing scanner system which optically reads a code pattern on an object. The system includes a scanner which directs a beam of radiation onto the object at one of a number of focal lengths. The system further includes a range determining unit for measuring the range of the object relative to the scanner, and a mechanism for alternating the focal length of the radiation beam to selectively focus it as commanded by a control module. The focal length of the beam is adjusted based on the measured range to enable accurate reading of the code pattern.

REFERENCES:
patent: 4794237 (1988-12-01), Ferrante

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