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Related Experiment Video

Updated: May 7, 2026

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection

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Active angular alignment of gauge blocks in double-ended interferometers.

Zdeněk Buchta¹, Simon Reřucha, Václav Hucl

¹Institute of Scientific Instruments, Academy of Sciences of the Czech Republic, Královopolská 147, Brno 612 64, Czech Republic. buchta@isibrno.cz.

Sensors (Basel, Switzerland)

|October 3, 2013

Summary

This study introduces an automated system for contactless gauge block calibration. It precisely measures gauge block length and alignment using combined interferometry techniques.

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Area of Science:

Metrology
Optical Engineering
Precision Measurement

Background:

Accurate calibration of gauge blocks is essential for industrial metrology.
Traditional calibration methods can be time-consuming and prone to errors.
Contactless methods offer potential for improved efficiency and accuracy.

Purpose of the Study:

To develop and implement an automated system for contactless gauge block calibration.
To integrate low-coherence and laser interferometry for precise measurements.
To create an algorithm for robust gauge block alignment and monitoring.

Main Methods:

A novel system combining low-coherence interferometry (for side positioning) and laser interferometry (for length measurement).
Development of a specialized algorithm for aligning gauge blocks to the measuring beam.
Implementation of tilt compensation (lateral and longitudinal up to 0.141 mrad) within the alignment algorithm.
Real-time monitoring of gauge block position during length measurement.

Main Results:

Successful implementation of an automatic contactless calibration system for gauge blocks.
Demonstrated capability of the system to identify gauge block side positions and measure length accurately.
Validated the alignment algorithm's effectiveness in compensating for significant lateral and longitudinal tilts.
Achieved precise gauge block position monitoring throughout the measurement process.

Conclusions:

The developed system offers an efficient and accurate solution for gauge block calibration.
The integrated interferometry approach and advanced alignment algorithm enhance measurement reliability.
This contactless method has the potential to significantly improve industrial metrology practices.