Abstract
A new optical pressure measurement technique has recently received wide attention. This scheme is based on the fact that some compounds emit light when excited by a suitable light source (photoluminescence).The intensity of the light is inversely related to partial pressure of oxygen (oxygen quenched), and is of longer wavelength than the excitation light. Taking pressure distribution on the surface is now practical. However, pressure distribution in space is not. Taking pressure distribution in space approached by lifetime method is discussed. As a result, it was confirmed to be able to measure the three-dimensional pressure distribution by using the time constant method.
