Dobosz, M.; Jankowski, M.; Mruk, J. Two-Axial Measurement of the Angular Microdeflection of a Laser Beam Using One Single-Axis Sensor. Sensors2023, 23, 9276.
Dobosz, M.; Jankowski, M.; Mruk, J. Two-Axial Measurement of the Angular Microdeflection of a Laser Beam Using One Single-Axis Sensor. Sensors 2023, 23, 9276.
Dobosz, M.; Jankowski, M.; Mruk, J. Two-Axial Measurement of the Angular Microdeflection of a Laser Beam Using One Single-Axis Sensor. Sensors2023, 23, 9276.
Dobosz, M.; Jankowski, M.; Mruk, J. Two-Axial Measurement of the Angular Microdeflection of a Laser Beam Using One Single-Axis Sensor. Sensors 2023, 23, 9276.
Abstract
The majority of current methods for measuring the angular deflection of a laser beam enable measurement only in one selected plane. However, there are tasks in which measurements of laser beam deflections in 3D are required. In this paper, we present a way of enabling two-axial measurements of the deflection of a beam based on a single-axis sensor. The key idea is to direct a laser beam alternately into one of two arms of a measurement system. In the first arm, the beam is transmitted directly to the angular sensor, while in the second, the beam is directed to the sensor via a special optical element that rotates the plane of the beam deflection; in other words, this element changes the deflection in the horizontal plane into a deflection in the vertical plane, and vice versa. To alternate the path of the beam, a variable phase retarder and a polarising beamsplitter are used. The proposed technique is experimentally verified, and the results confirm its effectiveness.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
