[20p-S322-1~17] 1.6 Ultrasonics

△ [20p-S322-9] In Situ Size Measurement of Microdroplets via Forward Light Scattering

〇Daichi Hayakawa¹, Shujiro Mitani¹, Keiji Sakai¹ (1.IIS, Univ. of Tokyo)

Keywords:Light Scattering,Inkjet,Size Measurement

An inkjet device depicts a promising future with application extending to printing, encapsulation, and chemical synthesis. Microdroplets created by inkjet are peculiar in that they measure only 10 µm while flying at 10 m/s. In such a small yet fast system, accurate measurement of the physical properties of the microdroplets, including their size, proves to be difficult. Although a few methods for size measurement have been established by previous works, none has been able to fulfill the requirement for a simple, speedy, and accurate measurement. Here, we introduce an in situ size measurement method via forward light scattering. With our method, the radius of a microdroplet was measured with an accuracy of 1%.