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Two-Axial Measurement of the Angular Microdeflection of a Laser Beam Using One Single-Axis Sensor.

Marek Dobosz1, Michał Jankowski1, Jakub Mruk1

  • 1The Metrology and Biomedical Engineering Institute, Warsaw University of Technology, 02-525 Warsaw, Poland.

Sensors (Basel, Switzerland)
|November 25, 2023
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Summary
This summary is machine-generated.

This study introduces a novel method for measuring laser beam deflection in 3D using a single-axis sensor. The technique directs the laser beam through two paths, one direct and one using optics to rotate the deflection plane, enabling two-axial measurements.

Keywords:
angular microdeflectionsinterferometric sensoroptical beam deflection sensing (OBDS)two-axial measurementvariable phase retarder

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Laser Technology

Background:

  • Current laser beam deflection measurement techniques are typically limited to single-plane measurements.
  • Many scientific and industrial applications require 3D angular deflection measurements.

Purpose of the Study:

  • To develop a method for achieving two-axial laser beam deflection measurements using a single-axis angular sensor.
  • To enable 3D deflection analysis with a simplified sensor setup.

Main Methods:

  • A measurement system directs a laser beam alternately into two distinct optical paths.
  • One path transmits the beam directly to the angular sensor.
  • The second path utilizes a specialized optical element (variable phase retarder and polarizing beamsplitter) to rotate the deflection plane, converting horizontal to vertical deflection and vice versa.

Main Results:

  • The proposed technique successfully enables two-axial measurements of laser beam deflection.
  • Experimental verification confirmed the effectiveness and accuracy of the developed method.
  • The system allows for comprehensive 3D deflection analysis using a single-axis sensor.

Conclusions:

  • The presented approach offers a practical solution for 3D laser beam deflection measurement.
  • This method simplifies the measurement setup by employing a single-axis sensor.
  • The technique has potential applications in fields requiring precise laser beam control and analysis.