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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Dual-reflector configuration in varied line-space grating displacement sensor
Zhengkun Liu1, Xiangdong Xu, Qin Zhou
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China.
The Review of Scientific Instruments
|May 2, 2008
Summary
A new dual-reflector configuration significantly improves grating displacement sensor accuracy. This method reduces measured displacement errors to below 0.03 mm, a tenfold improvement over single-mirror designs.
Area of Science:
- Optics and Photonics
- Metrology and Measurement Science
Background:
- Grating displacement sensors are crucial for precise measurement.
- Existing single-mirror configurations exhibit significant displacement errors.
Purpose of the Study:
- To enhance the accuracy of wavelength encoding varied line-space grating displacement sensors.
- To reduce measurement errors in displacement sensing.
Main Methods:
- Analysis of displacement errors in single-mirror grating displacement sensors.
- Implementation of a novel dual-reflector configuration.
- Comparative experimental evaluation of single-mirror versus dual-reflector setups.
Main Results:
- The dual-reflector configuration substantially decreases measured displacement errors.
- Errors for the dual-reflector sensor are less than 0.03 mm across the full 50 mm scale.
- This represents approximately a 90% reduction in error compared to the single-mirror design.
Conclusions:
- The dual-reflector configuration offers a significant advancement in grating displacement sensor accuracy.
- This improved sensor design is suitable for applications requiring high-precision displacement measurements.
