Device for detecting strain and foreign matters in glass contain

Details Device for detecting strain and foreign matters in glass contain Device for detecting strain and foreign matters in glass contain

1975-06-05

1976-06-15

McGraw, Vincent P.

Optics: measuring and testing

Material strain analysis

With polarized light

2091117T, 250223B, 250225, 356114, 356197, 356198, 356240, G01B 1118, G01N 2104, G01N 2116

Patent

active

039633489

ABSTRACT:
A device for detecting a strain and foreign matters in a glass container is designed to amplify the electrical output obtained by bringing vertical scanning lines into intersection with the image of horizontally rotating strain polarized light. A polarizer and an analyzer are disposed in such a manner that their optical axes cross each other at right angles, and polarized light from the polarizer is projected upon a rotating glass container under inspection and is allowed to pass through the analyzer only when strain and/or foreign matter is found in the glass container. The resulting strain polarized light is projected upon a non-storage camera tube through a lens so as to vertically scan with a line through the center of an image of the glass container on the photoelectric surface of the tube at a speed proportional to the moving speed of the glass container to thereby bring the vertical scanning lines into intersection with the image of the horizontally rotating strain polarized light.

REFERENCES:
patent: 1934187 (1933-11-01), Glasgow et al.
patent: 2073691 (1937-03-01), Gray
patent: 2509068 (1950-05-01), McMahon
patent: 2798605 (1957-07-01), Richards
patent: 3351198 (1967-11-01), Wyman
patent: 3456788 (1969-07-01), Stape et al.
patent: 3656854 (1972-04-01), Bricker et al.

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