Hollow cylindrical magnetic flux source for image detectors

Details Hollow cylindrical magnetic flux source for image detectors Hollow cylindrical magnetic flux source for image detectors

1992-09-03

1993-12-28

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 535, 335306, G09G 104, H01F 702

Patent

active

052743098

ABSTRACT:
An image detecting device is disclosed wherein an image detector is mounted within a rare earth permanent magnet structure with a hollow cavity and an access port that passes through the structure and thereby accessing the cavity. The shell is permanently magnetized to produce a substantially uniform magnetic field in the cavity. The shell's magnetization is the resultant of two magnetization components M1 and M2. M2 components are uniform in both magnitude and direction while M1 components are uniform in magnitude but not uniform in direction. Preferably, the magnitudes of the M1 and M2 components are substantially equal to each other but aligned in opposite directions in regions adjacent to the access port. The image detector located within the cavity of the magnet is oriented such that the magnetic flux in the cavity flows in the same direction as the electron beam passing through the cavity.

REFERENCES:
patent: 4835506 (1989-06-01), Leupold
patent: 4837542 (1989-06-01), Leupold
patent: 4839059 (1989-06-01), Leupold
patent: 4887058 (1989-12-01), Leupold
patent: 5216401 (1993-06-01), Leupold
Leupold et al., A Catalogue of Novel Permanent-Magnet Field Sources, paper o. W3.2, 9th International Workshop on Rare-Earth Magnets and their Applications, 1987, Bad Soden, FRG.

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