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Chapter 1:
Origins and Manifestations of Speckle
Abstract
In the early 1960s, when continuous-wave lasers first became commercially available, researchers working with these instruments noticed what at the time was regarded as a strange phenomenon. When laser light was reflected from a surface such as paper, or the wall of the laboratory, a high-contrast, fine-scale granular pattern would be seen by an observer looking at the scattering spot. In addition, measurement of the intensity reflected from such a spot showed that such fine-scale fluctuations of the intensity exist in space, even though the illumination of the spot was relatively uniform. This type of granularity became known as “speckle.”
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CHAPTER 1
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