Raymond D Walters

US Patent:

40764265, Feb 28, 1978

Filed:

Jun 29, 1976

Appl. No.:

5/700892

Inventors:

Harvey Andrew Gross - Circleville OH
Harry Robert Frey - Lancaster PA
John David Messner - Lancaster PA
Raymond Frederick Walters - Columbus OH

Assignee:

RCA Corporation - New York NY

International Classification:

G01N 2116

US Classification:

356239

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.