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Optical method of measuring angular displacement using four photodiode arrays.

K Sato¹, S Yamamoto, O Kamada

¹Utsunomiya University, Faculty of Engineering, Utsunomiya 321, Japan.

|December 1, 1984

Summary

This study introduces a novel angular displacement measurement method using photodiode arrays and cylindrical mirrors. The technique significantly reduces measurement errors, even with rotation axis inclination.

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Area of Science:

Optics and Photonics
Measurement Science and Instrumentation

Background:

Accurate measurement of angular displacement is crucial in various scientific and engineering fields.
Existing methods can be susceptible to errors, particularly with inclined rotation axes.

Purpose of the Study:

To investigate a new method for measuring angular displacement.
To enhance the accuracy and robustness of angular displacement measurements.

Main Methods:

Utilizing two pairs of photodiode arrays arranged in a square configuration.
Employing crossed linear images generated by two cylindrical mirrors.

Main Results:

The proposed method demonstrates a significant reduction in measurement error.

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The technique remains effective even when the rotation axis is inclined.

Conclusions:

The investigated method offers a promising approach for precise angular displacement measurement.
This technique provides improved accuracy and reliability in applications with potential axis inclination.