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Hand held dataform reader having strobing ultraviolet light illumination assembly for reading fluorescent dataforms

  • US 6,123,263 A
  • Filed: 01/29/1998
  • Issued: 09/26/2000
  • Est. Priority Date: 01/29/1998
  • Status: Expired due to Term
First Claim
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1. A dataform reader for a portable data collection device, the dataform reader adapted to image and decode a dataform, the dataform reader comprising:

  • a) an illumination assembly including an illumination source energizable to direct strobing illumination of a first range of wavelengths toward an imaging target area of the dataform reader for illuminating a target dataform positoned within the imaging target area such that the illuminated dataform emits an illumination pattern corresponding to an image of the target dataform, the illumination pattern having a second range of wavelengths and wherein the first and the second ranges of wavelengths are mutually exclusive;

    b) a two dimensional imaging assembly including a two dimensional photosensor array, the two dimensional imaging assembly actuatable to generate a signal representative of the image of the target dataform positioned in the imaging target area;

    c) the two dimensional imaging assembly including signal and image processing circuitry for processing and decoding the signal representative of the image of the target dataform positioned in the imaging target area;

    d) an optic assembly positioned with respect to the imaging target area to focus the emitted illumination from the target dataform onto the photosensor array and including a filter permitting illumination in the second range of wavelengths to be focused onto the photosensor array and preventing illumination in the first range of wavelengths from being focused onto the photosensor array; and

    e) control and selection circuitry electrically coupled to the imaging assembly and the illumination assembly to selectively actuate the imaging assembly and selectively energize the illumination source to image and decode the target dataform.

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