Bar code symbol readers with variable spot size and/or working d

Details Bar code symbol readers with variable spot size and/or working d Bar code symbol readers with variable spot size and/or working d

1987-01-28

1989-02-28

Pellinen, A. D.

Registers

Coded record sensors

Particular sensor structure

235454, 235470, 350 376, 350 61, G06K 710

Patent

active

048088048

ABSTRACT:
Systems for changing the working distance and/or the beam spot size of an outgoing laser beam scanned across symbols to be read by a bar code symbol reader use different optical assemblies, or a single optical assembly having changeable light-transmissive portions of a plate, or changeable pupils, or a movable laser light source.

REFERENCES:
patent: 3928759 (1975-12-01), Sansone
patent: 3995166 (1976-11-01), Hobart et al.
patent: 4333006 (1982-06-01), Gorin et al.
patent: 4414468 (1983-11-01), Laurer et al.
patent: 4560862 (1985-12-01), Eastman et al.
patent: 4575625 (1986-03-01), Knowles

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