Molecular Crystals and Liquid Crystals, Vol.612, No.1, 245-250, 2015
Control of Laser Speckle Noise by Using Polymer-Dispersed LC
Laser speckle noise occurs owing to the strong interference that originates in the high coherency of laser light and the surface topography of screen. The suppression of the speckle noise is necessary for laser displays such as an image projection system. To reduce the speckle noise, we have tried to control the speckle pattern by using liquid crystals (LCs). In this paper, we offer an idea for suppressing the speckle noise using a polymer-dispersed LC (PDLC) cell in which the speckle pattern can be varied in addition to the optical diffusive effect.