X-ray image intensifier tube apparatus having magnetic shield

Details X-ray image intensifier tube apparatus having magnetic shield X-ray image intensifier tube apparatus having magnetic shield

1996-05-17

1998-05-26

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313313, 313242, 313479, 250214VT, H01J 3100

Patent

active

057571180

ABSTRACT:
In an X-ray image intensifier tube apparatus inc-luding a cylindrical magnetic shield placed to surround the outer periphery of an X-ray image intensifier tube, a ferromagnetic thin plate is placed in front of a convex input window of a vacuum envelope and a correcting magnetic coil is placed inside the cylindrical magnetic shield to surround the input window. This structure allows an output image which is substantially free of distortion to be obtained.

REFERENCES:
patent: 3809889 (1974-05-01), McBroom
patent: 4000432 (1976-12-01), Coon et al.
patent: 4220890 (1980-09-01), Beekmans
patent: 4245160 (1981-01-01), Harao
patent: 4328418 (1982-05-01), Morgan et al.
patent: 4809309 (1989-02-01), Beekmans
patent: 4945223 (1990-07-01), Beauzamy
patent: 5059854 (1991-10-01), Smits

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