Abstract
Optical properties of Polymer Dispersed Liquid Crystals (PDLC) are determined by the used polymerisation method. We have previously performed a systematic study on UV curable mixtures in order to obtain a correlation between the characteristics of the UV irradiation i.e. intensity and exposure time, and the optical properties of PDLC samples. Here we report the results of a detailed investigation performed by using the UV lines of an Ar ion laser as light source to cure the standard mixture NOA65-E7. We observe that, due to the high intensity in a narrow wavelength region (333–363 nm), fast curing can be obtained leading to peculiar morphologies. We also demonstrate how is possible to exploit the laser curing technique to write switchable images in these materials.
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