Pit detector and method

Details Pit detector and method Pit detector and method

G - Physics

01

N

G01N 33/02 (2006.01) G01N 21/35 (2006.01) G01N 21/59 (2006.01) G01N 21/84 (2006.01)

Patent

CA 2144335

A method and apparatus for detecting the presence of an impurity within a substantially spherical object, such as piece of stone fruit. An infrared point source light emitting diode (32) positioned on one side of an inspection zone (24) transmits a single light beam across the inspection zone (24). A linear CCD array (44) for generating a signal that is proportional to the intensity of the light transmitted through the fruit as the fruit passes through the inspection zone (24) and a slit lens for focussing the light beam on the the CCD array (44) are provided. An infrared filter (42) is positioned between the lens (40) and the CCD array (44). Thus, as the fruit passes through the inspection zone (24) and the intensity of the light transmitted through the fruit is received by the CCD array (44), a two-dimensional analyzable bit map representative of the cross-section of the object's density is produced.

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