title: Visual measurement of the evaporation process of a sessile droplet by dual-channel simultaneous phase-shifting interferometry.
abstract: To perform the visual measurement of the evaporation process of a sessile droplet, a dual-channel simultaneous phase-shifting interferometry (DCSPSI) method is proposed. Based on polarization components to simultaneously generate a pair of orthogonal interferograms with the phase shifts of π/2, the real-time phase of a dynamic process can be retrieved with two-step phase-shifting algorithm. Using this proposed DCSPSI system, the transient mass (TM) of the evaporation process of a sessile droplet with different initial mass were presented through measuring the real-time 3D shape of a droplet. Moreover, the mass flux density (MFD) of the evaporating droplet and its regional distribution were also calculated and analyzed. The experimental results show that the proposed DCSPSI will supply a visual, accurate, noncontact, nondestructive, global tool for the real-time multi-parameter measurement of the droplet evaporation.
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Sun
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China.
authors.forename: Liyun
authors.initials: L
authors.lastname: Zhong
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China.
authors.forename: Chunshu
authors.initials: C
authors.lastname: Luo
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China.
authors.forename: Wenhu
authors.initials: W
authors.lastname: Niu
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China.
authors.forename: Xiaoxu
authors.initials: X
authors.lastname: Lu