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High-velocity measurement method in dual-frequency laser interference tracker based on beam expander and
Optics Express
|July 21, 2023
Summary
This study enhances laser tracker performance by introducing a beam expander and acousto-optic modulator. These innovations significantly increase transverse and radial tracking velocities for high-speed precision measurements.
Area of Science:
- Metrology
- Optical Engineering
- Precision Measurement
Background:
- Laser trackers offer intelligent, portable, and accurate large-scale measurements.
- Current laser trackers have limitations in measuring high-speed moving targets, reducing efficiency.
- Addressing the speed limitations is crucial for expanding laser tracker applications.
Purpose of the Study:
- To analyze factors limiting laser tracker velocity.
- To propose novel methods for enhancing laser tracker transverse and radial velocities.
- To enable high-velocity laser interference tracking for large-scale precision measurement.
Main Methods:
- Utilized a beam expander device to improve transverse tracking velocity.
- Employed an acousto-optic modulator to increase frequency difference between laser beams.
- Conducted experiments to validate the enhanced tracking capabilities.
Main Results:
- Achieved a transverse tracking velocity of 4.34 m/s and acceleration of 2.4 g.
- Reached a radial tracking measurement velocity of 6.2 m/s.
- Demonstrated a laser tracker miss distance of 2.25 mm.
Conclusions:
- The proposed methods effectively increase laser tracker measurement velocities.
- The developed high-velocity laser interference tracker is suitable for large-scale precision measurements.
- Applications include nuclear power, medical treatment, and rail transit.
