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Medical diagnostic apparatus using a Fresnel reflector

  • US 5,986,754 A
  • Filed: 12/08/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 12/08/1997
  • Status: Expired due to Term
First Claim
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1. For use in a medical diagnostic apparatus that comprises a light source to illuminate a sample of a biological fluid and a detector to detect light that has passed through the sample, a device that comprises(a) a reaction area for containing at least a portion of the sample, sandwiched between(b) a substantially transparent first layer, and(c) a second layer, comprising a metallized thermoplastic sheet having means for making an electrical connection to the metallized sheet and including a Fresnel reflector, for providing specular reflection of light that has passed through the first layer and the reaction area and directing the light toward the detector.

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