Physical properties of stretched polymeric substrates with periodic microrelief for optical diffraction elements and liquid‐crystal alignment

Abstract

Abstract— The effect of the formation of a periodic surface microrelief while stretching the polymeric substrates with thin hard coatings under specified conditions (a processing temperature lower than the glassing temperature, an elongation magnitude up to 250%, an elongation velocity <5 mm/min) is described. The microrelief period varies in the range from 0.5 μm up to hundreds of micrometers, the height up to 1 μm. The polar and azimuthal orientation of a liquid crystal on the surface of such substrates was studied. Methods are proposed to measure low values of the optical path length in media Δn ∼ λ and components of LC anchoring energy on microreliefed surfaces. The simulation description of the light diffraction in optical anisotropic materials is proposed on the basis of the Rokushima‐Yamakita approach for periodical media. An opportunity for the creation of various optical components on the basis of this effect was considered, namely, diffraction gratings, optical compensators, and various types of light‐scattering elements.

P‐58: Properties of Diffraction Optical Elements on the Base of Discotic Liquid Crystal for Display Applications

“…Practical realization of the materials with the surface microrelief for the DOE as well as methods of measurement of the diffraction parameters are described in [11,12].…”

Paper No P9: Diffraction on Anisotropic Substrates With Sinosoidal Surface Microrelief

“…The method of calculation was described in detail in [6,7]. In the case of investigation of oblique incidence influence on the diffraction orders' intensity the incidence angle was varied in range from 0 to 30 and then the intensities in every positive and negative order were compared.…”

“…For both reflected and transmitted TE and TM waves light intensities in the diffraction orders from 0 to ±5 have been calculated for the normal light incidence. Both theoretical and experimental data are compared in .…”

“…For both reflected and transmitted TE and TM waves light intensities in the diffraction orders from 0 to 65 have been calculated for the normal light incidence. Both theoretical and experimental data are compared in [6]. In [7], the OAGSM software was checked for the cases of oblique incidence on birefringent substrates with rectangular microrelief and different number of the layers in the relief protrusion.…”

Correlation between relief formation and structural rearrangements during annealing of oriented amorphous polymers with metallic coating

“…Such objects can be used as dispersing optical objects, compensators, orienting supports for LC displays, etc. [8].…”