| abstract |
Excitation light is irradiated to a measuring site in a living body, the excitation light causing the measuring site to produce fluorescence. Light intensity of fluorescence components of the fluorescence produced by the measuring site, which fluorescence components have wavelengths falling within a predetermined wavelength region containing 480 nm, is detected. Also, light intensity of fluorescence components of the fluorescence produced by the measuring site, which fluorescence components have wavelengths falling within a predetermined wavelength region containing either one of 630 nm and 700 nm, is detected. Information in accordance with a ratio between the two detected light intensities is displayed. |