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- W4288245887 abstract "Speckle correlation based optical levers SC OptLev possess attractive characteristics suitable for sensing small changes in the angular orientations of surfaces. In this study, we propose and demonstrate a spatial multiplexing technique for improving the dynamic range of SC OptLev. When the surface is in its initial position, a synthetic speckle intensity pattern, larger than the area of the image sensor is created by transversely shifting the image sensor and recording different sections of a larger speckle pattern. Then, the acquired images are stitched together by a computer program into one relatively large synthetic speckle pattern. Following the calibration stage, the synthetic speckle intensity pattern is used to sense changes in the surfaces angular orientation. The surface is monitored in realtime by recording part of the speckle pattern which lies within the sensor area. Next, the recorded speckle pattern is a cross correlated with the synthetic speckle pattern in the computer. The resulting shift of the correlation peak indicates the angular orientations of the reflective surface under test. This spatial multiplexing technique enables sensing changes in the angular orientation of the surface beyond the limit imposed by the physical size of the image sensor." @default.
- W4288245887 created "2022-07-28" @default.
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- W4288245887 date "2019-08-30" @default.
- W4288245887 modified "2023-10-18" @default.
- W4288245887 title "Improving Dynamic Range of Speckle Correlation based Optical Lever by spatial multiplexing" @default.
- W4288245887 doi "https://doi.org/10.48550/arxiv.1909.02095" @default.
- W4288245887 hasPublicationYear "2019" @default.
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