Concentric optical path equalizer with radially moving mirrors

Details Concentric optical path equalizer with radially moving mirrors Concentric optical path equalizer with radially moving mirrors

1997-01-14

1999-06-15

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

23546236, 359862, G06K 710

Patent

active

059124474

ABSTRACT:
The optical path between a camera positioned above a conveyor and objects traveling on the conveyor is adjusted by moving a plurality of mirrors that at least partially define the optical path. The mirrors are manipulated as a function of the height of the objects so that the length of the optical path between each object and the camera is generally the same. The plurality of movable mirrors are equidistant from and arranged about a central point. The plurality of movable mirrors are contemporaneously moved toward and away from the central point to equalize the length of the optical path. Each of the movable mirrors translates along a different travel path. The travel paths are non-parallel. The plurality of movable mirrors are arranged so that the optical path includes a plurality of segments, and at least one intersection is defined between the segments distant from the movable mirrors.

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