Very efficient speckle contrast reduction realized by moving diffuser device
作者： Shigeo Kubota , Joseph W. Goodman
DOI: 10.1364/AO.49.004385
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摘要: Speckle noise reduction is best tested on a precise speckle contrast measurement bench, which should be able to measure 100% in fully developed as well the smallest (for example, less than 10%) after its reduction. On such test we have measured very efficient by temporal averaging using moving diffuser tuning fork, vibrates at 100Hz over 60μm amplitude, distance that three times surface roughness correlation length of diffuser.
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