| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device and an observation device which can prevent its optical member from being damaged by heat caused by the light emitted from a light source. SOLUTION: The lighting device is equipped with a xenon lamp 11 to generate illumination light, a rotatable filter plate 14 arranged on a light path of the illumination light, which has an excitation filter 28 to filter the light within a wavelength band range of an excitation beam, and a G' filter 29 and an IR' filter to filter the light within a wavelength band range of a reference beam, and a band range switching filter plate 12 provided on the light path of the illumination light and between the xenon lamp 11 and the rotatable filter plate 14, which has an infrared fluorescence observation filter 22 to filter the light within a wavelength band range including the wavelength band ranges of the excitation beam and the reference beam. In the infrared fluorescence observation filter 22, the transmittance of the reference beam within the wavelength band range is predetermined to be lower than that of the excitation beam within the wavelength band range. COPYRIGHT: (C)2007,JPO&INPIT
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