Aug 28, 2022 · The existence of liquid crystal phase can be detected by using polarized optical microscopy, since liquid crystal phase exhibits its unique texture under microscopy. The contrasting areas in the texture correspond to domains …

Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal can flow like a liquid, but its molecules may be oriented in a common direction as in a solid.

In combination with a pulsed light source, the new microscope makes it possible to visualize dynamic phenomena in liquid crystals and other birefringent materials. Pulse illumination in a stroboscopic mode might reveal additional details of repeatable dynamic processes.

PolScope creates a map of the orientation of the optic axis in the sample and of the local value of the optical phase retardation; Limitations: Retardation should be in the range 0-272 nm; chiral structures (twisted) are not properly characterized. , how does the texture look like?

Aug 11, 2021 · We report the implementation of a dual- photoelastic modulator based polarimeter in a light microscope, enabling the determination of Stokes parameters at each pixel. As a case study,...

Jun 10, 2020 · Views of a new phase of liquid crystal as seen under the microscope. The diamond shapes reveal "domains" in which almost all of the molecules take on the same orientation as shown by the arrows (bottom).

Appearing under the polarizing microscope as ellipses, parabolas, hyperbolas, lines and points, colorful structural singularities are understood through topological and geometrical arguments. The most striking feature of liquid crystals is the wide variety of visual patterns they display.

Feb 8, 2014 · These defects, when viewed using polarized light microscopy, give rise to optical textures that are characteristic for each of the different liquid-crystalline mesophases and provide a valuable diagnostic tool for the identification of mesophase type.

As the name suggests, liquid crystals are materials which have properties intermediate to the solid and liquid states of matter. They are true fluids (i.e. they flow readily), but they retain orientational order on melting from the solid to the liquid crystal state.

In this book, we find described the instrument which was fundamental for observing the mesophases of thermotropic liquid crystals, the “crystallisation microscope”, that Otto Lehmann built for his studies on crystals. It consisted of a polarized-light microscope, equipped by heating and cooling systems for the control of temperature.