Method for inspecting cathode-ray-tube window for objectionable

Details Method for inspecting cathode-ray-tube window for objectionable Method for inspecting cathode-ray-tube window for objectionable

1976-06-29

1978-02-28

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

G01N 2116

Patent

active

040764265

ABSTRACT:
In inspecting a cathode-ray-tube window having a light-scattering inner surface, a pattern, which approximates the structure of the video images to be viewed through the window, is placed close to or against the inner surface. The pattern is observed through the window, and those local regions where the pattern appears to be distorted are identified.

REFERENCES:
patent: 3185022 (1965-05-01), Holeman

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