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Miniature optical readhead for optical diagnostic device

  • US 7,339,673 B2
  • Filed: 06/22/2005
  • Issued: 03/04/2008
  • Est. Priority Date: 03/05/2004
  • Status: Expired due to Fees
First Claim
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1. A miniature readhead for a photometric diagnostic instrument for illuminating a target area and detecting color information from the target area, the readhead comprising:

  • a housing having a hand-held form factor including a holder configured for receiving reagent sample media therein, the sample media having a plurality of test areas disposed in spaced relation thereon, each of the test areas configured to react with a sample when disposed in contact with the sample and to change color according to an amount of an analyte in the sample;

    the holder sized and shaped for forming an indexed fit with the sample media;

    an array of light sources coupled to said housing, each of said light sources configured to emit light onto a respective one of the test areas;

    an array of chambers disposed in said housing;

    an array of light detectors respectively disposed within said array of chambers;

    said chambers configured to enable each of said light detectors to receive diffuse, non-specular reflections of the light from a respective one of the test areas when the sample media is indexed within said holder; and

    said chambers configured to substantially prevent said light detectors from receiving specular reflections of the light.

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