Patent ID: 9572240
Date: 2017-02-14
CPC Classifications: F21V,G03F,H01J,H05G

Claim:
1. A light source apparatus, comprising: a vessel; a debris trap configured to trap at least a part of debris from a plasma, the plasma emitting light and being generated in the vessel; a light condenser mirror arranged at a light emitting side of the debris trap; and a shielding member arranged between the plasma and the debris trap, the shielding member having an aperture configured to limit a solid angle of the light such that an irradiation area of the light emitted from the plasma becomes smaller than an aperture of the debris trap at a side of the plasma, the debris trap being provided with a driving mechanism configured to drive the debris trap such that a part of the debris trap to which the debris adheres is deviated from a position of the debris trap facing the aperture.