Camera Technology

Digital Image Correlation (DIC) is a flexible, full-field measurement technique. Istra4D is one of the only commercially available DIC software platforms that enables users the flexibility to choose the best camera technology for any given materials testing application. At Dantec Dynamics, we embrace, integrate and support the very latest in what camera technology has to offer so you can do more with DIC. As of Istra4D 4.6, 10GigE, CoaXPress, USB 3 and GigE cameras are supported.

chart of camera capabilities
Figure 2 – Resolution, frame rate, cable length and multicamera setup capability for supported 10GigE, USB 3, CoaXPress and GigE cameras.

Material testing applications have a wide range of measurement requirements. Specimens differ in size from millimeters to multiple meters which requires a wide selection range of camera resolutions from small (<1 Mpx) to ultra-high (>10 Mpx). Samples can be loaded: uni-, bi- or multi-axially, requiring specific multicamera setup configurations, including: planar, bi-planar or circular. Testing speeds can be slow or fast requiring specific camera frame rates to capture precise measurement moments and events. Cable lengths are also important to consider when testing components within test rigs.  Ultimately size is not a challenge for DIC as with the new release of Istra4D 4.7, the limits of multicamera technoogy for USB 3 and GigE has now been expanded to up to the 16 cameras!

The growing demand for higher resolution as well as faster frame rates is a continuing trend that is pushing the performance envelope of camera technology. The performance of most camera types, often described through maximum resolution & frame rate, is limited by the bandwidth of their corresponding transport layer.The transport layer also determines the maximum cable length available, which is a factor that can limit the range of a DIC rig setup. Other limitations are multicamera capabilities, which are dependent on the PC & connection capacity.

The attributes of each camera model is easily identifiable through icons that categorize the respective characteristics of; camera resolution, frame rate, cable length & multi-camera setup capability. 

overview table of different camera
Figure 5 – Attribute overview of camera technologies, including: resolution, frame rate, cable length and multicamera setup capability