# Implementation of a speckle correlation based optical lever (SC-OptLev) with extended dynamic range

## 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.

## Key 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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Source: https://tomesphere.com/paper/1904.12673