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Colorimeter and assay device

  • US 6,445,451 B1
  • Filed: 02/12/1999
  • Issued: 09/03/2002
  • Est. Priority Date: 02/12/1998
  • Status: Expired due to Fees
First Claim
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1. A color measurement apparatus for determining the color composition on a specimen having an exposed surface, the apparatus comprising:

  • a first light emitting diode for producing light along a light path illuminating the specimen with light;

    a sensing means along the light path for receiving light reflected from said specimen and producing a detection signal representative of the intensity of light reflected from the specimen in response thereto;

    a mirror, elliptically shaped and having an aperture disposed therein, placed along the light path for focusing light reflected from the specimen and directing the reflected light to the sensing means; and

    a processor for receiving the detection signal and determining the characteristic of the specimen in response thereto, by strobing the light source and a detector simultaneously.

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