brewster angle microscopyIt is mainly used to observe the morphology, state, and changes of the polymer layer on the surface or internal interface of the liquid phase, with good image quality and resolution. It is an ideal way for online control and observation of morphological membrane parameters, which can be used at the gas-liquid interface toVisualize Langmuir monolayer or adsorption film for observation.

brewster angle microscopyUtilizing the polarization characteristics of light. When natural light reflects and refracts at the interface between two isotropic dielectrics, the polarization state of the light changes. In reflected light, the vibration of light perpendicular to the incident surface is greater than that parallel to it, and the degree of polarization of reflected light is related to the incident angle. When the incident angle is equal to the Brewster angle, the reflected light becomes only linearly polarized light perpendicular to the incident plane, and the intensity of the reflected light is zero at this time. If there is a monolayer on the interface, a new refractive index interface will be formed, and the original Brewster angle will no longer correspond to the Brewster angle of this new interface, and the reflected light intensity will no longer be zero. By receiving the reflected light information, the morphology of the surface of the monolayer can be observed.