Patent ID: 8369374

Claim:
A light source device, comprising a hollow light emission tube, in which mercury or a light-emitting gas is enclosed as a light emitting means, and a pulsed laser oscillator part emitting a pulsed laser beam towards said light emission tube, wherein a continuous-wave laser oscillator part is provided emitting a continuous-wave laser beam towards said light emission tube, wherein the continuous-wave laser oscillator part is adapted to produce the continuous-wave laser beam with an intensity that is smaller than an intensity of the pulsed laser beam that the pulsed laser oscillator part is adapted to produce, and wherein the light source device is adapted to emit both the continuous-wave laser beam and the pulsed laser beam are emitted towards said light emission tube when lighting is initiated, and is adapted to stop the emission of the pulsed laser beam towards said light emission tube after the lighting has been started so that only the continuous-wave laser beam is emitted towards said light emission tube to maintain lighting.