G - Physics – 02 – B
Patent
G - Physics
02
B
26/197
G02B 6/32 (2006.01) G02B 6/255 (2006.01)
Patent
CA 1309579
J. W. Fanning - 1 WAVE-SHAPED AC ARC FOR LENSING SYSTEM ABSTRACT OF THE DISCLOSURE A system is provided for forming an end of an optical fiber into a lens, using a high frequency AC electric arc of predetermined frequency, which avoids the creation of harmonic frequencies that could degrade the finished lens. An arc is established between a pair of electrodes, wherein the arc current varies substantially sinusoidally, to minimize the amplitude of harmonic frequencies. Voltage pulses are delivered to a primary of a transfomer, while the secondary of the transformer is coupled through a capacitor to one electrode, and the other electrode is coupled back to the secondary of the transformer. The inductance of the secondary winding plus the reflected inductance of the primary winding, when combined with the capacitance, results in a resonant circuit, which generates a sinusoidal output when excited at its resonant frequency. The square waves inputted to the transformer primary are at a frequency approximately equal to the resonant frequency of the resonant circuit.
555998
Fanning John W.
Itt Corporation
Smart & Biggar
LandOfFree
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