Projection cathode-ray tube with uniform optical multiple...

Details Projection cathode-ray tube with uniform optical multiple... Projection cathode-ray tube with uniform optical multiple...

H - Electricity

01

J

H01J 29/10 (2006.01) C03C 17/34 (2006.01) G02B 5/28 (2006.01) H01J 29/18 (2006.01) H01J 29/28 (2006.01) H01J 29/89 (2006.01)

Patent

CA 2049491

A projection cathode-ray tube for use in a projection television set. Usually, three tubes for three primary colors R, G and B are used. In the projection cathode-ray tube provided with an optical multiple interference film in order to effectively concentrate light beam emitted from a fluorescent plate onto a screen, the uniformity of the film thickness of the optical multiple interference film affects white uniformity of an image. By determining a short edge length / a long edge length of a face panel glass 0.85, .DELTA..lambda.50 is reduced.

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