抄録
A laser holographic interferometer was successfully applied to the visualization of the phenomena in cryogenic liquids, in particular the visualization of natural convection in liquid nitrogen and of thermal and pressure wave propagations, transient boiling and transient evaporation from a free surface in superfluid helium (He II). This technique has the advantage in yielding straightforward quantitative data. Counting interference fringes which appear in a holographic image provides quantitative information on the temperature or pressure variation in the liquid of interest. This method was also found to be applicable to even a very small variation of temperature, especially in thermal shock waves.
