Magnetic shield for image intensifier tube

Details Magnetic shield for image intensifier tube Magnetic shield for image intensifier tube

1975-07-25

1976-12-28

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For shield

313239, 313313, 313 94, 315 85, 250213VT, H01J 152

Patent

active

040004325

ABSTRACT:
Intensifier tubes for x-rays or low-light levels form an image of photoelectrons which is focused on a fluorescent viewing screen. Stray magnetic fields, including the earth's field, bend the electron trajectories and distort the image. Magnetic shielding has been used around the tube, leaving the image-receiving end open. Magnetic field leaking through the open end is reduced by extending the end of the shield around the image-receiving aperture inward and forward of the edge of the tube.

REFERENCES:
patent: 3026437 (1962-03-01), Niklas
patent: 3577027 (1971-05-01), Szegho
patent: 3688146 (1972-08-01), Bouwers
patent: 3858050 (1974-12-01), Carlson
"CRT Mounting System," by Swenson, IBM Technical Disclosure Bulletin, vol. 14, No. 1, June, 1971, p. 146.

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