Patent ID: 8459853

Claim:
A light source apparatus comprising: a light source section that emits a luminous flux whose quantity of light is larger in a central region than in a peripheral region; a condensing optical system that condenses an incoming luminous flux; a light distribution correction optical element positioned between the light source section and the condensing optical system, the light distribution correction optical element including a discrete central portion separated from a peripheral portion by a well-defined boundary, the discrete central portion having a constant negative power higher than that of the peripheral portion of the light distribution correction optical element; and a connector section capable of being detachably connected with a light guide that guides the luminous flux condensed by the condensing optical system; wherein the light source apparatus satisfies the expression 2.2<|fc/f|<5.5, where fc is the focal length of the discrete central portion of the light distribution correction optical element, and f is a focal length of the condensing optical system.