Setup BAM+shear device

Brewster angle microscope and shear device

A shearing device consisting of rotating rubber bands is mounted on a Langmuir trough.

Illuminating the air/water interface with a laser beam at the Brewster angle, polarized in the plane of incidence (p-polarized), guaraties that virtually no light will be reflected off a pure water interface.

Analysis of the reflected light can be used to extract information on the structure of the monolayer.

The analyzer (A) is set to optimize the contrast in the images (d_i~60º).

BAM+shear device setup A moving barrier is used to set the surface area of the monolayer and to keep a constant surface pressure.

The incident beam is directed at the Brewster angle (q_B) and polarized in the plane of incidence (d_i~0º).

Rotating bands impose a two-dimensional shear flow on a region of the monolayer.


The analyzer (A) is set to optimize the contrast in the images (d_i~60º).
		A moving barrier is used to set the surface area of the monolayer and to keep a constant surface pressure.

		The incident beam is directed at the Brewster angle (q_B) and polarized in the plane of incidence (d_i~0º).


	Rotating bands impose a two-dimensional shear flow on a region of the monolayer.