Implementation of a speckle-correlation-based optical lever with extended dynamic range
A. VijayakumarDepartment of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, IndiaD. JayavelDepartment of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, IndiaM MuthaiahDepartment of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, IndiaShanti BhattacharyaDepartment of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, IndiaJoseph RosenSchool of Electrical and Computer Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer-Sheva 8410501, Israel
2019en
ABI
Аннотация
A speckle-correlation-based optical lever (SC-OptLev) is constructed for the measurement of small changes in the orientation angle of a surface. The dynamic range of SC-OptLev is found to be twice that of a conventional OptLev for the same experimental configurations. Different filtering mechanisms are implemented, and the correlation results are compared. Two types of computer-automated SC-OptLevs, an open-source-based computing system with a low-cost image sensor and a commercial computing system, are presented with assistive computational modules.
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