Oscillatable holographic optical element for bar code scanning

Details Oscillatable holographic optical element for bar code scanning Oscillatable holographic optical element for bar code scanning

G - Physics

06

K

G06K 7/10 (2006.01)

Patent

CA 2062819

2062819 9117516 PCTABS00008 An oscillating holographic optical element for scanning a light beam across a bar code symbol. The holographic element (36) is mounted on a holding frame which is connected to a stepper motor (38) that is excited by electrical signals to cause the holographic element to oscillate. The holographic element can either transmit light outwardly toward the bar code symbol, or collect light scattered from the bar code symbol, or both. The holographic element can consist of a single hologram, two separate holograms, or two holograms superimposed over one another. The holographic element can also serve to filter received light.

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