Optical code reading device with autofocussing

Details Optical code reading device with autofocussing Optical code reading device with autofocussing

1991-07-16

1992-06-16

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235467, 235410, 235472, G06F 710

Patent

active

051226448

ABSTRACT:
In a code reading device, which receives reflected light obtained by scanning a code represented on a recording medium with a laser light beam and decodes it to obtain the code, the reading probability is improved by varying the focusing position for every scanning period with the laser light beam.

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patent: 4831275 (1989-05-01), Drucker
patent: 4843222 (1989-06-01), Hochcraf
patent: 4877949 (1989-10-01), Danielson
patent: 4939355 (1990-07-01), Rando et al.
Tech. Notes, RCH, Princeton N.J., "Automatic Cal. Krc", Tn No. 1361, Jan. 16, 1985, 2 pages.

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