Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-09-08
1996-06-18
Epps, Georgia Y.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356240, 209526, G01N 904
Patent
active
055280269
ABSTRACT:
According to the process of the invention, optical inspection of a translucent article, in particular optical inspection of a concave bottom of a container, in which the article is positioned between a radiation source and an image recording apparatus and an image of the article is recorded and processed, is improved by placing at least one optical correction element in the paths of rays between the radiation source and the image recording apparatus to correct ray paths causing undesired dark or black spots on the image, so that such dark or black spots are prevented or brightened in order that an adequate image for satisfactory image-analysis is produced.
REFERENCES:
patent: 3302786 (1967-02-01), Conrad
patent: 4083637 (1978-04-01), Ellinger et al.
patent: 4221961 (1980-09-01), Peyton
patent: 4551627 (1985-11-01), Reich
patent: 4959537 (1990-09-01), Kimoto et al.
patent: 5280170 (1994-01-01), Baldwin
Japanese Abstracts vol.4, No. 86, (P--16) (568) Jun. 20, 1980, & JP--A--55 050144 (Hajime Sangyo).
Japanese Abstract vol. 2, No. 75, (E--38) Jun. 14, 1978, & JP--A--53 040 583 (Hitachi Denshi), Apr. 13, 1978.
Burri Karl-Georg
Gysi Peter
Elpatronic AG
Epps Georgia Y.
Steady Jacqueline M.
LandOfFree
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