PROCESS FOR BROADENING CHOLESTERIC REFLECTION BANDS OF PHOTOPOLYMERIZABLE CHOLESTERIC LIQUID CRYSTALS AND OPTICAL ELEMENTS PRODUCED BY THIS PROCESS

摘要

Process for broadening cholesteric reflection bands of photopolymerizable cholesteric liquid crystals, and optical elements produced by this process. The invention relates to a process for broadening the cholesteric reflection bands of photopolymerizable cholesteric liquid crystals, which comprises the following process steps: 1) partial polymerization of a layer containing photopolymerizable cholesteric liquid crystals by exposure to actinic light for a defined brief period at a defined temperature, 2) observance of a defined waiting time without exposure (dark phase) at a defined temperature, 3) fixing of the resultant layer by exposure to actinic light at a defined temperature.