OTvis
Accurate Non-Destructive Testing with Lock-in Thermography
OTvis systems are based on optically excited lock-in thermography —a highly sensitive method for non-contact detection of subsurface defects. Perfectly suited for quality assurance, research, and industrial serial testing.
Applications
- CFRP Inspection
- Glue inspection
- Leather (inclusions, folds, repair areas)
- Corrosion Testing
- Wall Thickness Measurement
- Plastic Weld Joint Inspection
- Wind turbine rotor blade inspection
Advantages of OTvis
- Non-contact and non-destructive
- Depth-resolved flaw detection and wall thickness determination
- Suitable for testing large areas
- Precise and repeatable
VIS
IR
How does inpsection with OTvis work?
OTvis systems utilize optically excited lock-in thermography, a contactless testing method in which the surface of the object is stimulated with modulated light (e.g., halogen lamps). Internal defects such as delaminations or inclusions disrupt the resulting heat flow creating thermal patterns that are captured by an infrared camera and analyzed via software.
This method is especially suitable for inspecting large surfaces and complex geometries fast, highly sensitive, and depth-resolved.
This method is especially suitable for inspecting large surfaces and complex geometries fast, highly sensitive, and depth-resolved.
Typical OTvis Testing Workflow
1. Excitation
Periodically modulated light (e.g., halogen) generates thermal waves on the surface.
2. Heat Propagation
Heat flows into the component defects alter the thermal behavior.
3. Infrared Imaging
A synchronized IR camera captures the thermal response.
4. Signal Processing
Fourier transformation produces phase images where defects become visible—independent of surface variations.
Modular System
OTvis consists of:
- OTvis lamp controller
- Halogen lamps with tripods
- Software module for device control
Additionally required:
- IR camera with MWIR or LWIR detector
- ESG signal generator (except for OTvis 3600 with integrated 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.
- OTvis lamp controller
- Halogen lamps with tripods
- Software module for device control
Additionally required:
- IR camera with MWIR or LWIR detector
- ESG signal generator (except for OTvis 3600 with integrated 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 Elements
- Introduction in Active & passive thermography
- Easy data recording & analysis
- Basis image processing tools
DisplayImg Professional
- Laser unit & camera control
- Phase image analysis & Fourier evaluation
- Project management, API connection
- Compatible with all edevis excitation types
Our OTvis Systems
FAQ
Our frequently asked questions — answered quickly and easily.
Can OTvis be integrated into automated production lines?
For which materials and components is OTvis particularly suitable?
How deep can OTvis 'look' into the material?
What distinguishes OTvis from the other edevis systems?
What is the advantage of lock-in thermography over classical thermography?
Product inquiries
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