Non-destructive method and apparatus for detection of fruit and vegetable quality

  • US 5,822,068 A
  • Filed: 03/10/1997
  • Issued: 10/13/1998
  • Est. Priority Date: 03/10/1997
  • Status: Expired due to Fees
First Claim
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1. A method for indirectly estimating quality of a harvested, edible fruit or vegetable having a skin which comprises:

  • (a) exposing the skin of the fruit or vegetable to a source of red light which induces a fluorescence intensity at a frequency above the red light from chlorophyll in the skin of the fruit or vegetable;

    (b) detecting the fluorescence intensity produced by the skin; and

    (c) estimating the quality of the fruit or vegetable as a function of the intensity of the fluorescence detected, wherein when the fruit or vegetable has a first level of the fluorescence of the chlorophyll in the skin when the fluorescence intensity is relatively high which is indicative of an acceptable quality and wherein the intensity of the fluorescence of the chlorophyll at a second level which is decreased and which is indicative of an unacceptable quality.

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