高速ビデオカメラによる液晶の配向ゆらぎの直接観測

抄録

The orietational fluctuations in a smectic liquid crystal were successfully observed with a high-speed video camera. From the series of images obtained, first the Fourier transformation of them was made and then the time correlation function at each wave number was calculated. The time correlation function showed an exponential decay and the inverse of the relaxation time was proportional to the square of the wave number, as expected from the continuum theory. This indicates the validity of our experimental method.