Color grading apparatus utilizing infrared light source

Details Color grading apparatus utilizing infrared light source Color grading apparatus utilizing infrared light source

1976-05-13

1977-11-08

Evans, F. L.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

2091115, 2091116, 250226, G01J 350, G01N 2122

Patent

active

040573524

ABSTRACT:
Apparatus for color grading of products, such as fruits, vegetables, et cetera, employing light sources for illuminating the products in the infrared and green or lower wavelengths, and means for detecting and comparing the reflectance in the two light regions to measure certain properties of the product. The light source used for the infrared radiation is an improved gas discharge lamp utilizing argon gas.

REFERENCES:
patent: RE29031 (1976-11-01), Irving et al.
patent: 2933613 (1960-04-01), Powers
patent: 2982408 (1961-05-01), Blackburn et al.
patent: 2988219 (1961-06-01), Bartlett
patent: 3382975 (1968-05-01), Hoover
Desrosier et al, Food Engineering, May 1952, pp. 92, 93, 190 and 192.
Smith, Food Engineering, Sept. 1953, p. 53.

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