| 摘要 |
Observation is performed at a more appropriate sensitivity without causing deterioration of the image quality. Provided is a fluorescence observation apparatus (1) including an excitation light source (3) that emits excitation light to be radiated onto an imaging subject (A); a fluorescence-image acquisition portion (21) that is provided with an imaging device (18) that acquires fluorescence images (G 2 and G 3 ) by capturing fluorescence generated at the imaging subject (A) due to the irradiation with the excitation light emitted from the excitation light source (3); and a sensitivity adjusting portion (22) that adjusts an number of pixels for binning summing (B) and/or an exposure time for the imaging device (18) on the basis of luminance information of the fluorescence image (G 2 ) acquired by the imaging device (18) of the fluorescence-image acquisition portion (21) so that an SN ratio of the fluorescence image (G 2 ) becomes equal to or higher than a predetermined threshold. |
