×

Laser scanning code symbol reading system providing control over length of laser scan line projected onto a scanned object using dynamic range-dependent scan angle control

  • US 10,049,245 B2
  • Filed: 06/20/2012
  • Issued: 08/14/2018
  • Est. Priority Date: 06/20/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method of reading code symbols using a laser scanning code symbol reading system having a working distance, said method comprising the steps of:

  • (a) supporting, adjacent an object with a code symbol, a hand supportable laser scanning code symbol reading system having a scan line data buffer;

    (b) estimating a distance of said object from said reading system, and generating data representative of said estimated distance;

    (c) projecting a laser scanning beam, wherein the laser scanning beam is swept through a scan angle while maintaining a constant scan line length projected onto said object scanned by the laser scanning beam as the estimated distance of said object from said laser scanning code symbol reading system changes over time;

    (d) detecting the intensity of laser light reflected/scattered from a scanning field of said laser scanning code symbol reading system during the scan sweep of the laser scanning beam across said scanning field and any object in said scanning field, and generating a scan data signal representative of the detected laser light;

    (e) collecting a line of scan data over a sweep of the laser beam across the scanning field and any object therein, and buffing the collected line of scan data; and

    (f) decode processing said line of scan data collected and buffered in step (e) in an attempt to read any code symbol represented in said line of scan data, and when a code symbol is read within said line of scan data, then generating and transmitting symbol character data, corresponding to said decoded code symbol, to an intended destination.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×