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Minimizing laser persistence on two-dimensional image sensors

  • US 9,940,497 B2
  • Filed: 08/16/2016
  • Issued: 04/10/2018
  • Est. Priority Date: 08/16/2016
  • Status: Active Grant
First Claim
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1. A barcode reader comprising:

  • an image sensor having an array of pixels, the image sensor configured to sense an image of a barcode;

    an electronic shutter configured to expose the array of pixels to capture a complete image frame;

    an image processing device configured to receive the complete image frame from the image sensor, the complete image frame being transferred from the image sensor in at least a first part and a second part;

    a reference laser configured to indicate an approximate position of a field of view of the image sensor; and

    a laser control circuit configured to switch the reference laser on and off;

    wherein the laser control circuit is configured to;

    switch the reference laser off while the first part of the image frame is transferred from the image sensor to the image processing device, andswitch the reference laser on while the second part of the image frame is transferred from the image sensor to the image processing device.

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