HOANG-YAN LIN2018-09-102018-09-102014https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942369006&doi=10.1364%2fAO.53.000E38&partnerID=40&md5=d9fea10c135c4155abaf49aa18485596http://scholars.lib.ntu.edu.tw/handle/123456789/387053We have demonstrated an efficient speckle reduction method for laser illumination using a microvibrated paper screen along the projection direction. Using this method, a micro-vibrated amplitude of 0.532 μm, or a 2π phase change is sufficient to de-correlate the generated speckle pattern for a static SHG green laser beam image. When the measured speckle contrast is lowered to about 5.0%, and comparable with an LED source, a speckle-free image can be achieved. This technique will be suitable for compact and portable laser illumination equipment, image display, signal sensing devices, and so forth. Wearable and near-to-eye laser display applications are also included. © 2014 Optical Society of America.Display devices; Harmonic generation; Laser beams; Image display; Laser illuminating; Laser illumination; Projection direction; Signal-sensing devices; Speckle contrasts; Speckle patterns; Speckle reduction; Specklejournal article10.1364/AO.53.000E382-s2.0-84942369006