Implementation of a speckle correlation based optical lever (SC-OptLev) with extended dynamic range
A. Vijayakumar, D. Jayavel, M. Muthaiah, Shanti Bhattacharya, and, Joseph Rosen
TL;DR
This paper introduces the SC-OptLev, a speckle correlation optical lever with double the dynamic range of traditional devices, utilizing filtering techniques and automated systems for improved surface angle measurement.
Contribution
The paper presents a novel speckle correlation optical lever with extended dynamic range and compares different filtering mechanisms and automated implementations.
Findings
Dynamic range is doubled compared to conventional OptLev.
Filtering mechanisms affect correlation results.
Automated systems enable low-cost and commercial implementations.
Abstract
A speckle correlation based optical lever (SC-OptLev) is constructed for the measurement of small changes in the angle of orientation 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, 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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