Patent ID: 8616747

Claim:
A light source apparatus comprising: a first light source that emits light including a first wavelength band and a second wavelength band; a second light source that emits light in a third wavelength band, the third wavelength band being different from the light in the first and second wavelength bands; an optical filter section including a transmission section that transmits light in the first wavelength band; an optical path joining section that reflects the light in the third wavelength band emitted from the second light source to join an optical path of the light in the third wavelength band to an optical path of the light emitted from the first light source; an illumination mode selection section for selecting at least one of first to third illumination modes; and an optical filter drive section that if the first illumination mode is selected in the illumination mode selection section, drives the optical filter section so that the transmission section is retracted from the optical path of the light emitted from the first light source, if the second illumination mode is selected, drives the optical filter section so that the transmission section is continuously inserted in the optical path of the light emitted from the first light source, and if the third illumination mode is selected, drives the optical filter section so that the transmission section is intermittently inserted in the optical path of the light emitted from the first light source.