Quantification of the effects of time-varying speckle patterns on speckle images using a modified speckle influence degree method
| Autor: | Shuo Zhang, Jian Ying Zhu, Dong Dong Wang, Yuan Yuan, Min Yuan Sun, Yong Bi, Wei Nan Gao |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry System of measurement 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Speckle pattern Optics Laser display Human visual perception 0103 physical sciences Degree (angle) Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business |
| Zdroj: | Optics Communications. 463:125368 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2020.125368 |
| Popis: | Numerous methods that generate time-varying speckle patterns have been used unsuccessfully to eliminate speckle. In this study, the speckle influence degree (SID) method is used in conjunction with a measurement system that emulates the human eyes. Time-varying speckle patterns are generated at different velocities, whereby the correlation degree between the speckle patterns, the correlation time, and SID, are calculated as a function of velocity. It is shown that the correlation time is 6 ms and SID is reduced to 6.4% when the velocity is increased up to 40 μ m ∕ ms . Further, when a chip motor with a velocity of 286 μ m ∕ ms is used to modulate speckle patterns, the correlation time and SID are reduced to 1 ms and 3.2%, respectively. Based on these results, the mechanism of time-varying speckle patterns is quantified for the first time, laying a scientific basis for proposing innovative methods of speckle elimination. |
| Databáze: | OpenAIRE |
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