Angle Sensor Based on Multiple Optical Arm Amplification

Angle measurement technology, an essential geometric measurement technique, has extensive applications in manufacturing, aerospace, and other fields. It has become a focal point in the research of measurement technology. The novel optical angular sensor that adopts multiple optical arm amplification technology is presented in this paper. The system is equipped with a dual-layer pyramid reflector configuration. This configuration takes advantage of multiplicative light path reflection effects to amplify angular displacements. The reflection laser displacement is detected by using a position-sensitive detector (PSD), effectively converting angular measurements into linear displacement parameters. By alternating measurement of multiple measuring units, continuous high-precision angle measurement can be achieved. Experimental verification has confirmed the technical feasibility of this multiple optical arm amplification principle. Prototype testing shows that the sensor can achieve an accuracy of ±0.5″ under standard operating conditions. The continuous measurement principle of the angle sensor prototype is verified by the alternating measurement of multiple measuring units with two adjacent groups of reflective surfaces. The proposed measurement principle offers a low-cost and high-precision solution for angle measurement.