1. Field of the Invention
The present invention relates to an apparatus for measuring a particle size and a method for measuring the particle size.
2. Description of the Related Art
As conventional methods for measuring the particle size, there are known an electric detection method of electrically detecting a volume of the particle which is suspended in an electrolytic solution (see U.S. Pat. No. 3,757,213, for example) and an image analysis method of optically capturing an image of the particle and analyzing the size of the particle from the captured image (see Japanese Unexamined Patent Publication No. HEI 8(1996)-136439, for example).
As another method of measuring the particle size, there is known a method of estimating the particle size from light scattering characteristics of the particle. However, it is not easy to find out a light scattering characteristic such as shows a good and simple correspondence to the particle size, and therefore, a problem lies in that complicated calculation is required for obtaining the particle size from the scattered light.