Electrodeless fluorescent light source having reduced far field

Details Electrodeless fluorescent light source having reduced far field Electrodeless fluorescent light source having reduced far field

1979-06-18

1980-12-16

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315 57, 315 70, 315 85, 336226, 336232, H05B 4116, H05B 4124

Patent

active

042400104

ABSTRACT:
An electrodeless fluorescent light source includes an electrodeless fluorescent lamp and an induction coil wherein the magnitude of the far field electromagnetic radiation, produced directly by the induction coil, is minimized. The induction coil includes current loops which are configured so that the magnetic dipole moment of each current loop is offset by the magnetic dipole moment of other current loops in order to minimize the net magnetic dipole moment of the induction coil. One embodiment of the induction coil includes a conductor wound in the shape of a square prism. The current on adjacent side edges of the prism is in opposite directions, thus resulting in two pairs of mutually opposing magnetic dipole moments.

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