Patent ID: 6504603
Filing Date: 2003-01-07
Classification: G01N

Abstract:
A method for detecting the presence of undesired matter in an egg, comprising the steps of:(a) irradiating the egg to be examined with radiation which comprises at least two predetermined wavelength ranges; (b) providing a first measuring signal S1 representative of the amount of radiation in a first wavelength of said two predetermined wavelength ranges transmitted by the egg; (c) providing a second measuring signal S2 representative of the amount of radiation in a second wavelength of said two predetermined wavelength ranges by the egg; (d) automatically determining whether an egg to be examined is a white or brown egg; (e) only for brown eggs: correcting the first and second measuring signals relative to each other with at least one brown egg correction factor correcting for the shell being brown to produce corrected first and second measuring signals; (f) comparing the first measuring signal S1, with the second measuring signal S2 as corrected relative to each other in step (e); and. (g) determining the presence of undesired matter in the brown egg to be examined on the basis of the outcome of said comparison in step (f).