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Updated: Mar 8, 2026
12:14
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
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Measurement of straightness without Abbe error using an enhanced differential plane mirror interferometer
Applied Optics
|February 4, 2017
Summary
This study introduces an enhanced interferometer for high-resolution straightness measurement. It achieves 17.5 nm resolution by minimizing errors and enhancing stability using a novel optical design.
Area of Science:
- Metrology
- Optical Engineering
- Precision Measurement
Background:
- Interferometers are crucial for precise measurements.
- Traditional interferometers face challenges with Abbe error and dead path error.
- High-resolution straightness measurement is essential in various scientific and industrial applications.
Purpose of the Study:
- To present an enhanced differential plane mirror interferometer for high-resolution straightness measurement.
- To overcome limitations of conventional interferometers, specifically Abbe error and dead path error.
- To achieve a measurement resolution of 17.5 nm.
Main Methods:
- Utilizing two sets of space-symmetrical beams in measurement and reference arms.
- Incorporating a Koster prism, wedge prism assembly, and wedge mirror assembly.
- Employing a differential optical path change converted to phase shift within a common path interferometer system.
Main Results:
- Achieved a measurement resolution of 17.5 nm.
- Successfully avoided Abbe error crosstalk from pitch, yaw, and roll angles.
- Minimized dead path error, significantly improving measurement stability and accuracy.
Conclusions:
- The enhanced differential plane mirror interferometer offers high resolution and accuracy for straightness measurement.
- The novel optical design effectively mitigates common interferometric errors.
- Experimental results validate the theoretical analysis and performance of the developed system.
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