Acta Optica Sinica, Volume. 27, Issue 6, 1107(2007)
Fabrication of Electrical-Controlled Polymer Dispersed Liquid Crystal Switchable-Focus Holographic Lens
When ac voltage is applied, the refractive indexes of liquid crystal droplets and polymer binders match gradually, and the phase-type electrical-controlled switchable focus lens based on polymer dispersed liquid crystal (PDLC) material is switched on and off . In experiments, recipes and characteristics of micrometer size and nano-scale size polymer dispersed liquid crystal materials have been researched. The newly developed optimized nano-scale liquid crystal droplets polymer dispersed liquid crystal recipe is adopted to fabricate polymer dispersed liquid crystal cell samples with thickness of 5~6 μm. And in plane wave and spherical wave interference optical recording system, primary off-axis polymer dispersed liquid crystal focus-switchable holographic lens sample is developed with focal length of 20 mm. Amplified images with positive one-order diffraction are achieved and the driving voltage threshold for “0”, “1” transfer is about 60 V ac voltage. Furthermore, the conception of electrical-controlled focus-switchable optical image system based on polymer dispersed liquid crystal focus-switchable lens integration is put forward.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese]. Fabrication of Electrical-Controlled Polymer Dispersed Liquid Crystal Switchable-Focus Holographic Lens[J]. Acta Optica Sinica, 2007, 27(6): 1107