Abstract: A spectroscopic measurement apparatus 1A comprises an integrating sphere 20 in which a sample S is located, a spectroscopic analyzer 30 dispersing the light to be measured from the sample S and obtaining a wavelength spectrum, and a data analyzer 50. The analyzer 50 includes an object range setting section which sets a first object range corresponding to excitation light and a second object range corresponding to light emission from the sample S in a wavelength spectrum, and a sample information analyzing section which determines a luminescence quantum yield of the sample S, determines a measurement value ?0 of the luminescence quantum yield from results of a reference measurement and a sample measurement, and determines, by using factors ?, ? regarding stray light in the reference measurement, an analysis value ? of the luminescence quantum yield with the effect of stray light reduced by ?=??0+?.

Abstract: A spectrometer is provided with an integrating sphere 20, inside which a sample S of a measurement target is disposed and which is adapted for observing measured light emitted from the sample S, and a Dewar vessel 50 which retains a refrigerant R for cooling the sample S and at least a portion of which is located so as to face the interior of the integrating sphere 20. Gas generated from the refrigerant R is introduced through predetermined gaps G1-G6 functioning as a gas introduction path and through a plurality of communicating passages 64 formed in a support pedestal 61, into the integrating sphere 20. The gas introduced into the integrating sphere 20 absorbs water in the integrating sphere 20 to decrease the temperature in the integrating sphere 20, so as to prevent dew condensation from occurring on a portion of a second container portion 50b of the Dewar vessel 50 exposed in the integrating sphere 20.

Abstract: A spectrometer 1A is provided with an integrating sphere 20 for observing measured light emitted from a sample S of a measurement target, and a Dewar vessel 50 which retains a medium R for regulating temperature of the sample S, so as to cover the sample S and a second container portion 50b of which is located so as to face the interior of the integrating sphere 20. The sample S can be easily regulated at a desired temperature with the use of the Dewar vessel 50 retaining the medium R so as to cover the sample S. As the second container portion 50b is located so as to face the interior of the integrating sphere 20, the temperature of the sample S is regulated by the medium R, while inhibiting an external ambience around the integrating sphere from affecting the sample S. Therefore, the sample S can be efficiently regulated at a desired temperature.

Abstract: A spectroscopic measurement apparatus 1A comprises an integrating sphere 20 in which a sample S is located, an irradiation light supplying section 10 supplying excitation light via an entrance aperture 21 to the interior of the integrating sphere 20, a sample container 400 holding the sample S in the interior of the integrating sphere 20, a spectroscopic analyzer 30 dispersing the light to be measured from an exit aperture 22 and obtaining a wavelength spectrum, and a data analyzer 50 performing data analysis of the wavelength spectrum. The analyzer 50 includes a correction data obtaining section which obtains correction data of the wavelength spectrum considering light absorption by the sample container 400, and a sample information analyzing section which corrects and analyzes the wavelength spectrum to obtain sample information.

Abstract: A photodetecting device 1 includes an integrating sphere 20 for observing light to be measured generated according to irradiation of a sample with excitation light and a sample holder 60 removably attached to the integrating sphere 20, the integrating sphere 20 has an excitation light introducing hole 201 for introducing the excitation light and a sample introducing hole 205 for introducing a cell C held by the sample holder 60, the sample holder 60 is locked to the sample introducing hole 205 and holds the cell C for accommodating the sample, and the cell is disposed so that an entrance surface of the cell C, through which the excitation light enters the cell C, inclines relative to the surface perpendicular to the optical axis L of the excitation light.

Abstract: In a fluorescence measuring method and apparatus, a sample S is irradiated with pulsed pumping light supplied from a pumping light source. Fluorescence generated by the sample S is detected by a photodetector by way of a condensing optical system and a spectroscope. The fluorescence time waveform is subjected to a data analysis in a data processing unit in a controller. This computes waveform data and physical quantities such as fluorescence lifetime. The pumping light time waveform is fixedly arranged with respect to a time axis used for data analysis. Fitting calculations are carried out while moving the fluorescence time waveform and fitting range from an initial position earlier than a pumping light peak to a later end position, and optimal measurement waveform data is selected according to a predetermined selection criterion. Waveform data is thus computed accurately and efficiently regardless of fluctuations in the fluorescence time waveform.

Abstract: A sample S is irradiated with pulsed pumping light supplied from a pumping light source 1, fluorescence generated by the sample S is detected by a photodetector 5 by way of a condensing optical system 3 and a spectroscope 4, and the fluorescence time waveform is subjected to a data analysis in a data processing unit 62 in a controller 6, so as to compute waveform data and physical quantities such as fluorescence lifetime. Here, the pumping light time waveform is fixedly arranged with respect to a time axis used for the data analysis, a plurality of fitting calculations are carried out while moving the fluorescence time waveform and fitting range from an initial position earlier than a pumping light peak to a later end position, and optimal measurement waveform data is selected according to a predetermined selection criterion.