Electric lamp and discharge devices: systems – Cathode ray tube circuits – Pulse storing
Patent
1989-03-28
1991-07-16
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Pulse storing
315 85, 313240, 2505151, H01J 2906
Patent
active
050327640
ABSTRACT:
In order to compensate for the influence of magnetic fields on charged-particle beams, in particular in imaging devices provision is made for a coil constituted by a support plate of substantially constant thickness and by patterns deposited on the support in such a manner as to ensure that the absorption of electromagnetic energy is constant over the entire surface of the coil within a predetermined pass-band.
In a first embodiment, the patterns are transparent to the electromagnetic energy of a desired frequency band. In a second embodiment, complementary patterns are employed in order to obtain constant absorption over the entire surface of the coil.
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General Electric CGR SA
LaRoche Eugene R.
Zarabian Amir
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