Method for suppressing halo on face plate of cathode ray tube

Details Method for suppressing halo on face plate of cathode ray tube Method for suppressing halo on face plate of cathode ray tube

H - Electricity

01

J

313/35.151

H01J 29/18 (2006.01)

Patent

CA 1169115

ABSTRACT OF THE DISCLOSURE A cathode ray tube face plate construction for suppressing the halo on the face plate of the cathode ray tube having a face plate formed of glass with an index of refraction in the vicinity of 1.52 and with outer and inner surfaces. A fluorescent phosphor screen is carried by the inner surface. A metallic coating may overlie the phosphor screen on the side of the screen facing away from the face plate. An absorbing filter is disposed between the phosphor screen and the face plate for absorbing light emitted from the phosphor screen. An angle sensitive short wave pass filter is dis- posed between the phosphor screen and the absorbing filter for reflecting light emitted at a high angle from the phosphor screen.

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