Patent ID: 6888319
Filing Date: 2005-05-03
Classification: A61B,H05B

Abstract:
1. A drive circuit for a pulsed flashlamp including: a capacitor chargeable to a voltage sufficient when applied across said lamp to maintain a desired optical output; an inductor connected in series with said lamp; a high speed semiconductor switch connected to, when off, block discharge of said capacitor and to, when on, permit discharge of said capacitor through said inductor and lamp; a one-way path for current flow from said inductor through said lamp at least when said switch is off; a sensor for power through said lamp; and a control operative in response to said sensor to control the on/off state of said switch to maintain the ratio of the power deviations through said lamp to the average pulsed lamp power substantially constant over a desired range of average pulsed lamp power.