Abstract: An apparatus for bioluminescence measurement, which measures a substance in vivo on the basis of bioluminescence, is provided with a device for supplying a reagent or buffer solution kept at a constant temperature in a thermostat tank to a container for culturing cells, so that the temperature of the container can be kept constant and the reagent or buffer solution in the container can be stirred.

Abstract: In a fluorescence spectrophotometer a first spectrum of fluorescence emitted by a sample in a state where the wavelength of excitation light is fixed to an arbitrary wavelength; a second spectrum of fluorescence emitted by the sample in a state where the wavelength of excitation light is changed to another wavelength; and the wavelength when corresponding peaks in the two spectra are approximately in accordance with each other is set for the fluorescence wavelength emitted by said sample.

Abstract: This invention is for obtaining ratios of Raman spectrum by using a referential sample representing at least two of Raman spectral lines, and for correcting fluorescence intensities of the sample to measured on the basis of the obtained ratios of Raman spectrum.

Abstract: A spectrofluorophotometer enabling spectrum correcting treatment to be done highly accurately, including an intercepter the incident light in a fluorescence detecting system, and an interceptor intercepting the incident light in a monitoring detecting system, so as to carry out zero point correction for both of these detecting systems.

Abstract: This invention relates to a device for measuring fluorescence polarization, which permits to measure the degree of fluorescence polarization in a short time and also its variations in time.In order to achieve this object, a device for measuring fluorescence polarization according to this invention is provided with a control means permitting to set arbitrarily the polarization angle of the polarizer and that of the analyzer, by means of which the polarization angle of the polarizer or the analyzer is successively varied to arbitrary values so as to obtain polarization angles and fluorescence intensities corresponding thereto so that the degree of fluorescence polarization is obtained by using a plurality of the polarization angles and the fluorescence intensities corresponding thereto.

Abstract: A spectrophosphorimeter with a single spectrometer so as to obviate the need of a couple of spectrometers of conventional spectrophosphorimeters, wherein one spectrometer is operated as an excitation-side spectrometer only when the light is allowed to pass a light interceptor, and the other spectrometer works as a phosphorescence-side spectrometer only when the light is substantially interrupted. The single spectrometer is used on the excitation side when the light is allowed to pass and on the phosphorescence side when the light is interrupted.