Optical scanning system comprising optical chopper

Details Optical scanning system comprising optical chopper Optical scanning system comprising optical chopper

1993-01-27

1994-05-24

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359219, 250233, 250236, G02B 2608

Patent

active

053154282

ABSTRACT:
Optical scanning system to scan a code on an object comprising a laser source (1), a laser beam shaper (2) receiving a laser beam from the laser source and focussing the laser beam on the object, a mirror polygon (4) having facets (6-9), of which at least one is reflective, and being rotated by a motor (5), a mirror array (10) surrounding the polygon arranged in such a way that the laser beam will generate a scanning pattern (3) on the code to be detected, and a detector (24) receiving the light scatterred by the object, in which system the mirror array (10) is substantially entirely surrounding the polygon (4); the polygon (4) is designed to perform an optical chopper function, in such a way that during one rotation cycle of the polygon (4) each mirror (11-22; 61-75) of the mirror array (10) will at least once receive the laser beam and generate its own scanning line.

REFERENCES:
patent: 3399590 (1968-09-01), Johnson, Jr. et al.
patent: 4003627 (1977-01-01), Wu et al.
patent: 4018504 (1977-04-01), Wu et al.
patent: 4795224 (1989-01-01), Goto

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