What Is a Single-Camera DIC Video Extensometer? How Haytham Achieves Non-Contact Strain Measurement

extensometers, the Haytham video extensometer adopts single-camera DIC digital image correlation technology: it captures specimen surface images with a camera, identifies the displacement changes of the gauge area through algorithms, and calculates axial strain, transverse strain, displacement and deformation data.

The core advantage of single-camera DIC is non-contact measurement. During testing, the device needs no specimen clamping and adds no extra mass or stiffness to the specimen — especially suitable for thin sheets, rubber, plastics, composites, metal specimens and large-deformation materials. For specimens that slip easily, fracture easily or are unsuitable for clamping, the video extensometer effectively reduces human interference, keeping test results closer to the material's true deformation state.

CT specimen point-spacing deformation measurement

Haytham video extensometer supports automatic recognition of markers such as dots, horizontal lines, crosses and QR codes; gauge lengths can be set according to test needs, stress-strain curves are output in real time, and data can be synchronized with testing machine force. The device is calibrated before leaving the factory, so users can start testing right after installation, reducing complex commissioning.

In high- and low-temperature environments, conventional contact extensometers are often limited by fixtures, temperature compensation and installation space, while the Haytham video extensometer can be used in complex scenarios such as high-temperature furnaces and low-temperature chambers, achieving long-distance, non-contact, high-precision strain measurement.

For laboratories that need to improve testing efficiency, reduce specimen interference and expand measurement scenarios, single-camera DICvideo extensometer is a more flexible and intuitive strain measurement solution.