Light scattering spectrophotometer with vibrating exit slip

Abstract

Abstract A spectrophotometer for measuring Raman and Brillouin spectra of the light scattered from a sample. The spectrophotometer of the invention comprises a monochromatic light source, a sample cell into which the monochromatic light is projected so as to be scattered by the sample, and a monochromator for dispersing the light scattered by the sample. The wavelength of the output light from the monochromator is periodically changed at a predetermined frequency by vibrating the exit slit of the monochromator. The periodically changing output light signal is converted to a corresponding electrical signal, which is Fourier decomposed. The Fourier decomposition makes it possible to distinguish the Raman and Brillouin components of the scattered light from the other components such as the exciting or incident light and stray light.

Inventors

• 👤 Akiyoshi Wada

Bibliographic Details