Non-destructive method and apparatus for detection of fruit and

Details Non-destructive method and apparatus for detection of fruit and Non-destructive method and apparatus for detection of fruit and

1997-03-10

1998-10-13

Evans, F. L.

Optics: measuring and testing

By shade or color

With color transmitting filter

356318, 2504581, G01N 2164

Patent

active

058220682

ABSTRACT:
A non-destructive method of testing of fruits and vegetables for post-harvest quality (firmness, texture, aroma and color) using fluorescence intensity of the skin or leaves is described. A low intensity red light source (10) is used to irradiate the skin or leaves of fruits or vegetables to provide a first level F.sub.o of fluorescence intensity above that of red light in the 710 to 740 nM range. A second high intensity red light source is used to produce a maximal second fluorescence intensity F.sub.m in the skin or leaves in the 710 to 740 nM range. The ratio F.sub.v /F.sub.m =(F.sub.m -F.sub.o)/F.sub.m is then preferably determined to provide a measure of the quality of the fruit or vegetable.

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