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Related Experiment Video

Updated: Jun 18, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

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Published on: April 26, 2014

A laser interferometer for measuring straightness and its position based on heterodyne interferometry.

Benyong Chen1, Enzheng Zhang, Liping Yan

  • 1Nanometer Measurement Lab, Zhejiang Sci-tech University, Hangzhou 310018, China. chenby@zstu.edu.cn

The Review of Scientific Instruments
|December 2, 2009
PubMed
Summary

This study introduces a novel laser interferometer that precisely measures both the magnitude and position of straightness errors. This advancement offers high-precision, simultaneous measurement capabilities for improved accuracy in metrology applications.

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Area of Science:

  • Metrology
  • Optical Engineering
  • Precision Measurement

Background:

  • Straightness errors are critical in precision engineering.
  • Existing laser interferometers often fail to provide the relative position of straightness errors.
  • Accurate characterization of both magnitude and position is essential for users.

Purpose of the Study:

  • To propose and validate a novel laser interferometer system.
  • To enable simultaneous measurement of straightness error magnitude and its relative position.
  • To achieve high precision and a compact design for practical applications.

Main Methods:

  • Design of a novel optical configuration for a laser interferometer.
  • Theoretical analysis of the heterodyne interferometry measurement principle.
  • Experimental validation using a linear stage and a flexure-hinge stage.

Main Results:

  • The proposed interferometer successfully measures straightness errors and their positions.
  • Experimental results demonstrate validity and repeatability.
  • Nanometer measurement accuracy was achieved, confirming high precision.

Conclusions:

  • The developed laser interferometer offers simultaneous measurement of straightness error and position with high precision.
  • The system exhibits a compact structure, making it suitable for various metrology applications.
  • This technology addresses a key limitation in current straightness measurement techniques.