unit 10 this unit 10 performs operations of correction correlation generality and others a display and record unit 11 consists of a graphic recorder x y plotter teletypewriter or the like for indication of the arithmetic results as shown detector 6 for the measurement of absorbency and circular dichroism is disposed at the terminal end of the light axis a 1 according to this invention another detector 12 is disposed by way of another spectroscope 13 along an extension axis a 2 crossed with light a 1 at the sample cell 5 this detector 12 detects fluorescence i e photoenergy which said samples are excited by radiations to generate and to emit the fluorescent output signal is fed to a measuring circuit 14 and then is introduced into the data processing and control unit 10 in the same manner as the other measured data the data processing and control unit 10 not only performs correlation and correction of the output data at the respective measuring circuits 8 9 and 14 but also controls the spectroscope 13 for wavelength scanning of radiations to sample cell 5 the circular polarization modulator 4 and the temperature ph value concentration and other features of said sample cell for these purposes a circular polarization modulating circuit 15 and temperature control circuit 16 are provided respectively to receive instructions from the data processing and control unit 10 and respectively to control operations of circular polarization modulator 4 and the temperature and other conditions of said sample cell 5 the strength of radiations to samples 5 is watched.