期刊
OPTICAL REVIEW
卷 12, 期 2, 页码 93-96出版社
OPTICAL SOC JAPAN
DOI: 10.1007/s10043-004-0093-4
关键词
computer-generated hologram; kinoform; speckle noise; isolated zero; 2 pi ambiguity; phase freedom; iterative dummy area algorithm
类别
An iterative speckle reduction method is proposed to reduce the speckle noise in the reconstruction of kinoforms. Because a kinoform only has phase modulation, the phase freedom of the reconstructed image is usually utilized for spectrum smoothing. We consider the speckle noise as isolated zeros among the discrete reconstructed points. An isolated zero leads to a 2 pi circle of the image phase differences. Our proposed iterative speckle reduction method changes the image phase to avoid the 2 pi circles in the reconstructed points. Computer simulations are shown to demonstrate the effect of our method. (c) 2005 The Optical Society of Japan.
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