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CRT Beam Spot Contour Measurement

IP.com Disclosure Number: IPCOM000064392D
Original Publication Date: 1985-Jul-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Clitheroe, AM Shepherd, ET [+details]

Abstract

The beam spot size in a shadow mask CRT may be investigated and measured by plotting a 5% maximum brightness level contour of the spot. To do this, the position of maximum brightness which occurs when the spot is centered over a phosphor dot on the screen is found.