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Instrument Calibration

Instrument Calibration

Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
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Updated: Mar 19, 2026

Implementation of a Reference Interferometer for Nanodetection

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Published on: April 26, 2014

Self-calibrating subpiconewton balance using optically levitated microspheres.

Xincai Xu, Nan Li, Zhuangzhuang Wang

|March 18, 2026

Summary

This summary is machine-generated.

This study introduces a new apparatus for measuring weak forces at the sub-piconewton scale. The system achieves high sensitivity and resolution using optical levitation, enabling direct force measurement.

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Area of Science:

Physics
Metrology
Optical Engineering

Background:

Accurate measurement of weak forces is crucial for scientific and engineering applications.
Existing sensors often lack sensitivity and require complex signal processing.

Purpose of the Study:

To develop a highly sensitive and high-resolution apparatus for sub-piconewton force measurement.
To enable direct force measurement without intermediate variable conversion.

Main Methods:

Utilized a weakly focused vertical optical levitation system.
Employed an active null-balance method to counteract applied forces.

Main Results:

Achieved direct force measurement over a large linear dynamic range (-1000 fN to 1000 fN).
Demonstrated a force resolution of 52 fN.

Conclusions:

The developed apparatus offers a high-sensitivity platform for sub-piconewton force measurements.
This technology provides a foundation for future micro-force metrology applications.