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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
An analytical balance measures mass and requires regular calibration to...

Calibration Curves: Linear Least Squares

Calibration Curves: Linear Least Squares

A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...

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Related Experiment Video

Updated: Feb 20, 2026

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

Calibration method for a large-scale structured light measurement system.

Peng Wang, Jianmei Wang, Jing Xu

|October 20, 2017

Summary

This summary is machine-generated.

This study introduces a cost-effective calibration method for structured light systems using a planar mirror and an out-of-focus camera. This approach enhances measurement precision for large-scale 3D scanning applications.

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Last Updated: Feb 20, 2026

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

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Published on: May 20, 2013

Determining 3D Flow Fields via Multi-camera Light Field Imaging

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Published on: March 6, 2013

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Published on: June 6, 2017

Area of Science:

Metrology and Measurement Science
Optical Engineering
Computer Vision

Background:

Structured light (SL) 3D scanning is a key non-contact measurement technique.
Calibration accuracy is critical for SL system precision, but large-scale calibration requires expensive, precise gauges.
Existing methods face challenges with defocusing in close-range calibration setups.

Purpose of the Study:

To develop a cost-effective and accurate calibration method for large-scale structured light systems.
To reduce the reliance on large, expensive calibration gauges.
To address and overcome the defocusing issue in short-distance calibration.

Main Methods:

A novel calibration method utilizing a planar mirror to decrease gauge size and cost.
Implementation of an out-of-focus camera calibration technique to manage defocusing.
Experimental validation of the proposed calibration approach.

Main Results:

The planar mirror method significantly reduces the required size and cost of calibration gauges.
The out-of-focus camera calibration effectively resolves issues caused by shortened working distances.
Experimental data confirms the high accuracy of the proposed calibration method.

Conclusions:

The proposed calibration method offers a practical solution for accurate and affordable large-scale structured light 3D scanning.
This technique lowers the barrier to entry for high-precision 3D measurement systems.
The study demonstrates the feasibility and effectiveness of using planar mirrors and out-of-focus imaging for SL system calibration.