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DOE OSTI · 1831675

Geometry-based, Gaussian profile model for optical knife-edge displacement sensor

Zameroski, Ross·Gomez, Michael·Schmitz, Tony
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Abstract

This article describes an analytical model for the well-known optical knife-edge displacement sensor that predicts the relationship between the knife-edge displacement and photointerrupter output. The model includes: 1) the geometry of a rectangular knife-edge profile penetrating a circular laser beam perpendicular to the beam axis; and 2) the Gaussian intensity profile for the beam cross-section. A comparison between the model predictions and measured photointerrupter for a linear range of knife-edge displacements is provided. It is shown that good agreement is obtained without model calibration.

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Zameroski, Ross, Gomez, Michael, Schmitz, Tony. 2021-10-21. Geometry-based, Gaussian profile model for optical knife-edge displacement sensor. https://doi.org/10.1016/j.precisioneng.2021.10.011

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