Liquid crystal transfer film and method of making liquid crystal transfer film and birefringence liquid crystal elements

Abstract

The invention discloses a liquid crystal transfer film and a method of making the liquid crystal transfer film and birefringence liquid crystal elements. The liquid crystal transfer film comprises a soft film and a liquid crystal polymer layer located on the upper surface of the soft film. The liquid crystal polymer layer, being of a crystalline phase, comprises a non-flattening end face. Relatively short period of the liquid crystal polymer on the nematic phase enables significant decrease in premature hot curing of the liquid crystal polymer. The liquid crystal polymer powder is not required to enter a process environment. Thus the process environment is free of pollution due to the liquid crystal polymer powder. The location disparity of the liquid crystal transfer film making and the birefringence liquid crystal element making enhances the flexibility of the making environment designs and further lowers the overall cost. Meanwhile, the conventional heating nozzle system needed for the liquid crystal polymer filling is no longer required.

Description

technical field [0001] The invention relates to an optical element, and in particular to a liquid crystal optical element. Background technique [0002] Previous related documents (for example: World Patent Publication No. WO-03 / 015424 and World Patent Publication No. WO-2005 / 006056) mentioned birefringent optical elements with surface relief structures. This birefringent optical element mainly forms a surface relief interface between isotropic materials aligned with each other and birefringence liquid crystal material, and this surface relief interface can be used as a birefringence microlens array. Light with a first polarization state will generate a first-order refractive index when passing through the interface, while light with a second polarization state will generate a different second-order refractive index when passing through the interface. [0003] The manufacturing method of the birefringent optical element with the surface relief structure is as described in t...

AI Technical Summary

Problems solved by technology

However, this approach will encounter the following difficulties in practice

[0004] (1) The liquid crystal polymer must maintain its phase state as a nematic phase for a long time, which tends to cause premature thermal curing of the liquid crystal polymer

[0005] (2) The manufacturer must bring the liquid crystal polymer powder in the crystalline phase into the process environment, which often causes the process environment to be polluted by the liquid crystal polymer powder

[0006] (3) The manufacturer must install the heating nozzle system required to fill the liquid crystal polymer (nematic phase)

Images