.Spatial modulation for electronic speckle patterns and its demodulation[J].Optoelectronics Letters,2005,1(2):141-143 Spatial modulation for electronic speckle patterns and its demodulation SUN Ping TAO Chun-xian ZHANG Li WANG Xiao-feng HAN Qing College of Physics and Electronics, Shondong Normal University, Jinan 250014, China Abstract:       A spatial modulation method for electronic speckle patterns is presented. Carrier fringes are produced by object tilting and the phase field of deformation is demodulated by Fourier transform. The principle is discussed. The system and some typical experimental results are offered. The results prove that by using object tilting method speckle patterns can be modulated very well and the out-of displacement of an object can be obtained effectively. Hits: 3885 Download times: 170 View Full Text    Download reader