Projection cathode ray tube

Details Projection cathode ray tube Projection cathode ray tube

H - Electricity

01

J

313/35

H01J 29/00 (2006.01) H01J 29/89 (2006.01)

Patent

CA 1131285

PROJECTION CATHODE RAY TUBE Abstract of the Disclosure A projection cathode ray tube has a target that is mechanically adjustable by means external to the evacuated envelope. The target extends into the evacuated space and is mounted upon a bellows that forms part of the envelope. The target is moved relative to other optical elements within the envelope by means extending through the bellows to provide both axial and pivotal adjustment after the tube is sealed. This structure enables other optical components including image reflectors to be constructed integrally with the envelope, and also improves heat transfer between the target and the external space, permitting control of the target temperature.

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