In recent years, nano-sized particles and bubbles have been used in various fields, such as equipment cleaning, agricultural growth promotion, and food cleaning. However, it is difficult to accurately measure their size and quantity suspended in water. The purpose of this study is to develop a device that can simply measure the size and quantity of particles and bubbles. In this report, we applied the laser diffraction and scattering method to capture images of scattered light using a digital camera when water containing standard particles of 200 to 800 nm in diameter mixed in pure water was placed in a glass tank and irradiated with a single wavelength laser light of 532 nm. The results suggest that it is possible to estimate the size of particles by performing a Gaussian function approximation using the RGB R values of the obtained scattered light images, and calculating the peak R values and area from the approximation formula.
Minami et al. (Wed,) studied this question.