Method and device for measuring circular dichroism spectra

A device for measuring circular dichroism spectra comprising:

• a white light source which irradiates a white light,
• a sample cell in which a sample is disposed,
• a spectroscope dispersing the light output from the sample cell, and
• a detector detecting a light intensity of the dispersed light by the spectroscope, which has a sensor consisting of a charge-coupled device,
• wherein
• the white light source, the sample cell, the spectroscope, and the detector are disposed on a light path of the white light in series,
• the white light is irradiated from the white light source to the sample without dispersing the light into a monochromatic light,
• the light output from the sample is dispersed,
• the light intensity of the dispersed light is detected by the detector having the sensor consisting of the charge-coupled device, and then
• a circular dichroism spectrum of the sample is measured on the basis of the light intensity of the dispersed light by the detector, and
• wherein said detector comprises a micro-channel plate, and
• wherein a light input timing into the detector is regulated by the micro-channel plate.

A method for measuring circular dichroism spectra comprising the steps of:

• irradiating a white light projected from a white light source to a sample without dispersing the light into a monochromatic light,
• dispersing the light output from the sample,
• polarizing one of the white light or dispersed light both linearly by a light polarizer and circularly by a polarization modulator,
• detecting a light intensity of the dispersed light by a detector having a sensor consisting of a charge-coupled device, and then
• measuring a circular dichroism spectrum of the sample on the basis of a result of the detection by the detector, and
• wherein a dependence of polarization degree of the circularly polarized light on a wavelength is reduced by a summation of block spectra on the respective wavelength of the light intensity that is detected by the sensor.