28 May 2004 Dynamic diffraction ring projector by doped polymer-dispersed liquid crystal
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Abstract
Ring light distribution patterns emerging after illumination of a material that forms a conic beam can be obtained in diverse cases. There are some phenomena that produce such distributions without an artificially tailored or designed mask. This device is produced by intermixing and curing of conventional PDLC form by the combination of optical glue and the nematic liquid crystal E7. When the device is illuminated with a He-Ne laser, a ring diffraction pattern with a spot in the center is observed. It was observed experimentally that the radius of the projected ring decreased when we applied an external voltage to the device with the indium tin oxide electrodes. The voltage dependent variation in the radii of the rings can be understood as a change in the period of the concentric spiral following the direction of the applied field when a voltage is applied in this device.
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Mario Perez-Cortes, Arturo Olivares-Perez, Mauricio Ortiz-Gutierrez, Juan Carlos Ibarra-Torres, "Dynamic diffraction ring projector by doped polymer-dispersed liquid crystal", Proc. SPIE 5289, Liquid Crystal Materials, Devices, and Applications X and Projection Displays X, (28 May 2004); doi: 10.1117/12.526847; https://doi.org/10.1117/12.526847
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