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23

2026/07

ExtensometerVideo extensometerVideo extensometer accuracy
How Accurate Are Video Extensometers? Can They Replace Contact Extensometers?

Video extensometer accuracy explained: interpretation of the JJG762-2007/ISO 9513 class 0.5 standard, four influencing factors — calibration, speckle, lighting and out-of-plane displacement — and comparison with contact extensometers.

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21

2026/07

DIC digital image correlation technologyDigital image correlation methodDIC strain measurement
DIC vs Ordinary Video: The Principle of Material Deformation Measurement Explained

How does DIC measure material displacement and strain through cameras? This article introduces DIC speckle preparation, image matching, strain computation, the difference between 2D and 3D DIC, and the main factors affecting DIC measurement accuracy.

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21

2026/07

Video extensometer recommendationsVideo extensometer brands
How to Choose a Video Extensometer? Key Selection Points and Product Recommendations for 2026

One-sentence conclusion: when choosing a video extensometer, first confirm the accuracy class meets the GB/T12160/ISO9513 class 0.5 requirement, then filter item by item against specimen type, strain range, temperature environment and testing machine compatibility. If you want one device covering metal, rubber, films a...

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21

2026/07

Video extensometerVideo extensometer brands
Which Video Extensometer Brand Is Best? Mainstream Brands and Buying Advice for 2026

The first tier of imported video extensometer brands includes ZwickRoell (Germany), Instron (USA), Epsilon (USA), Imetrum (UK) and Shimadzu (Japan). In the domestic camp, Haytham, with its self-developed single-camera 3D DIC technology, class 0.5 accuracy and wide coverage of -196°C~2300°C and 0-1000% strain, is one of...

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30

2026/06

DIC system selection3D DICFull-field deformation measurement
How to Choose a DIC System? Key Selection Considerations for Haytham DIC Systems

When choosing a DIC system, do not look at a single parameter only; judge comprehensively by test object, field of view, deformation magnitude, temperature environment, sampling needs and data analysis methods. Different scenarios have different requirements.

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30

2026/06

Difference between DIC systems and strain gaugesFull-field strain measurement
DIC System vs Strain Gauge: Haytham Makes Deformation Measurement More Intuitive

Strain gauges are common tools in material testing, suitable for local strain data. But for complex structures, non-uniform materials, large-deformation specimens and multi-area analysis, they provide only limited measuring points and can hardly reflect the overall deformation state.

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29

2026/06

Single-camera 3D DICHaytham DIC system3D deformation measurement
Which Test Scenarios Suit the Haytham Single-Camera 3D DIC System?

The Haytham single-camera 3D DIC system is a vision measurement system for material mechanics and structural deformation testing. Through monocular vision and DIC algorithms, it acquires 3D topography, displacement and strain data of the specimen surface, suitable for various complex testing scenarios.

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29

2026/06

DIC material testingFull-field deformation measurementHaytham DIC
Why Do Material Tests Need a DIC System? Haytham Provides Full-Field Deformation Data

In mechanical testing of materials, traditional measurement relies on strain gauges, extensometers or displacement sensors. These obtain local data, but with non-uniform deformation, local strain concentration, crack propagation or complex failure, single-point measurement often fails to reflect the true state.

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29

2026/06

DIC systemDIC digital image correlationNon-contact strain measurement
What Is the Haytham DIC System? A Non-Contact Full-Field Strain Measurement Solution

The Haytham DIC system is a non-contact full-field deformation measurement system based on digital image correlation, mainly for material mechanical testing, structural deformation analysis, complex-condition experiments and R&D verification. Its core principle is tracking the displacement changes of speckles or featur...

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29

2026/06

Video extensometer selectionNon-contact strain measurement equipmentHaytham video extensometer
How to Choose a Video Extensometer? Key Parameters for Single-Camera DIC Solutions

When choosing a video extensometer, do not look only at appearance or a single accuracy indicator; judge comprehensively by specimen type, test environment, deformation range and data output needs. A suitable video extensometer should simultaneously satisfy accuracy, stability, usability and scenario adaptability.

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