Process for fabricating lenses for manufacturing cathode ray tub

Details Process for fabricating lenses for manufacturing cathode ray tub Process for fabricating lenses for manufacturing cathode ray tub

1976-09-15

1977-06-21

Lazarus, Richard B.

350189, 354 1, H01J 942

Patent

active

040307905

ABSTRACT:
A process for fabricating lenses for use in manufacturing cathode ray tube screen structure wherein a matrix of data points is selected on the viewing screen of the cathode ray tube and a light source is positionally located at each of the data points by optical scanning exposure apparatus. The location information for each of the data points is recorded and a cathode ray tube is constructed having the screen structure fabricated in accordance with the recorded light source location information. Error between the light source location information and electron beam landing of the cathode ray tube is measured and the error measurements are utilized to correct the light source location information which is then submitted to a lens design program to furnish lens manufacturing information.

REFERENCES:
patent: 3949226 (1976-04-01), Dugan et al.
patent: 3949411 (1976-04-01), Yonai et al.

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