PTvis
Non-contact thermography with flash pulses
The PTvis system uses powerful flash lamps for short thermal excitations of thin layers. Fast IR camera images and a Fourier-based pulse-phase evaluation allow layer thicknesses, porosity, thermal conductivity and material defects to be precisely determined - ideal for paint testing, coatings and CFRP analyses
Applications
- Coating and paint thickness measurement
- Inspection for corrosion under coatings (e.g., filiform corrosion)
- Inspection of CFRP and other fiber-reinforced composites
- Bonding inspection of inserts
- Detection of delaminations, porosity, impacts
- Inspection of adhesive joints
- Non-destructive surface inspection
Advantages of PTvis
- Particularly suitable for crack detection in metals and composite materials
- Non-contact, defect-selective inspection method
- High penetration depth combined with high resolution
- Phase analysis reduces surface artifacts
- Applicable even on rough surfaces or complex geometries
- Automatable and suitable for inline integration
VIS
IR
How does inspection with PTvis work?
PTvis systems use the principle of active pulse thermography: a short, intense light pulse from flash lamps generates a rise in temperature on the component surface. Defects in the material affect the resulting heat flow – these thermal deviations are made visible using a high-speed infrared camera and analyzed with the support of specialized software.
Typical procedure of a PTvis inspection
1. Excitation by flash light
High-performance flash lamps generate a short, intense heat pulse on the surface within milliseconds.
2. Heat flow within the material
The heat spreads evenly – until it is disrupted by material defects, delaminations, or changes in layer thickness.
3. Detection using an infrared camera
A fast, high-resolution IR camera captures the thermal responses in real time.
4. Software-assisted analysis
The evaluation is performed automatically using the edevis software DisplayImg. Fourier analysis generates phase and amplitude images that reveal even subtle differences – including inspection report, quantification, and visualization.
Modular system
PTvis consists of:
- PTvis flash generator
- Flash lamp(s)
- Software module for device control
Additionally required:
- IR camera with MWIR or LWIR detector
- ESG signal generator
- edevis DisplayImg software
- Test bench/handling system (optional, for automated tests)
The system can be used for both laboratory tests and automated inline setups.
- PTvis flash generator
- Flash lamp(s)
- Software module for device control
Additionally required:
- IR camera with MWIR or LWIR detector
- ESG signal generator
- edevis DisplayImg software
- Test bench/handling system (optional, for automated tests)
The system can be used for both laboratory tests and automated inline setups.
Evaluation software:
DisplayImg Professional
- Control of laser unit & camera
- Phase image analysis & Fourier evaluation
- Project management, API integration
- Compatible with all edevis excitation types
DisplayImg Automation
- Flexible modular system
- Active & passive thermography
- Automated data acquisition
- OPC connection & SQL export
- Barcode/DMC scanner
FAQ
Our frequently asked questions — answered quickly and easily.
Can PTvis be used automatically in production lines?
How does PTvis differ from OTvis or other edevis systems?
What advantages does PTvis offer compared to other methods?
What is pulse thermography – and how does it work with PTvis?
What typical applications are there for PTvis?
Product inquiries
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