Electric lamp or space discharge component or device manufacturi – Process – With testing or adjusting
Patent
1991-11-27
1992-09-08
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With testing or adjusting
445 30, 445 64, 445 68, 358107, H01J 900, H01J 942
Patent
active
051454327
ABSTRACT:
An optical interrogation system has camera arrays useful for determining the locations of a plurality of apertures on a flat tension shadow mask and fiducial marks on a screened front panel of a CRT. The system determines the actual location of apertures or fiducial marks with respect to the cameras' field of view. By eliminating gray scaling, the processing only for light/dark transitions in single-bit binary valued pixels from each of the cameras in parallel, i.e., simultaneously, remarkable rapidity is obtained in the interrogation of widely spaced fields with minimal hardware. The system may also be used to interrogate mask support surfaces on the front panel prior to welding the mask thereto.
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Midland Richard W.
Rozansky Boris
Tepe Thomas W.
Ramsey Kenneth J.
Zenith Electronics Corporation
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