Optical egg inspecting apparatus

Details Optical egg inspecting apparatus Optical egg inspecting apparatus

1985-02-27

1986-05-27

Howell, Janice A.

Radiant energy

Luminophor irradiation

With ultraviolet source

G01N 2164

Patent

active

045917230

ABSTRACT:
An optical egg inspecting apparatus includes a first transducer unit having a first sensitivity range of 400 to 500 nm in wavelength which corresponds to the absorption spectrum range of yolk (the yellow) and a second transducer unit having a second sensitivity range of 500 to 700 nm in wavelength which corresponds to the visual range excluding the first range. Therefore, the first transducer unit can detect eggshells but cannot detect the yolk, while the second transducer unit can detect both shells or yolk. When the first unit does not detect shells and additionally the second unit detects yolk, the presence of yolk included in egg white is decided even where the egg white includes shells. Further, the two transducer units cannot detect the presence of egg white because a polarized beam projected onto and reflected from egg white to be inspected is shut off by an analyzer having polarization axes arranged perpendicular to those of the polarized beam.

REFERENCES:
patent: 2961540 (1960-11-01), Jaskowsky et al.
patent: 4516856 (1985-05-01), Popelka

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