![]() ![]() Nowadays, most of phones, computers, television sets and other electronic devices implement LCDs as a one of the most important optical display systems for high-performance flat panel display of information. The color (wavelength) of the reflected light depends on mechanical stress, temperature, external electric and magnetic fields, etc.ĭue to the abovementioned properties, LCs have been used in practical applications for many years, for instance in liquid crystal displays (LCDs). However, the most popular engineering applications of them are caused by selective reflection of the incident light. CLCs also exhibit optical activity and circular dichroism. ![]() It means that in such an optical media, the propagating wave of the monochromatic light decomposes into two waves, which propagate with different velocities. this substance have two different refractive indices. First of them is the abovementioned optical birefringence, i.e. However, due to the strongly periodic helical structure, cholesteric liquid crystals are characterized by unique optical properties. The abovementioned groups differ in physical properties, especially in optical ones. nematic, smectic, and cholesteric liquid crystals (CLCs). The classification of LCs includes three types of liquid crystalline phases, i.e. Most of them are organic compounds with elongated molecules that influence their physical properties. In some temperature ranges, these materials exhibit both the properties of liquids and the properties of crystalline solid state. Liquid crystals are the interesting fourth state of matter that lies between the crystalline solid and amorphous liquid states. Among the mentioned crystalline structures, special importance have the so-called liquid crystals (LCs). The best characterized materials possessing these properties are crystals, because their refractive indices are well defined due to their specific structures. Birefringence is the optical property of materials having refractive indices, which depend both on the polarization and propagation direction of the incident light. ![]()
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