When Error Is Not an Option
Telecentric lenses are the optical foundation behind modern semiconductor inspection, precision metrology, and AI vision systems.
In advanced manufacturing environments, image accuracy determines the reliability of inspection results. If the optical system introduces distortion, magnification variation, or reflection artifacts, even the most advanced algorithms cannot compensate for errors at the source.
This is exactly where telecentric lenses become critical.
Telecentric optics eliminate perspective errors, stabilize magnification, and deliver distortion-free imaging—providing the reliable visual foundation required for precision inspection, metrology, and AI training data.
Why Conventional Industrial Lenses Are Becoming a Bottleneck
Semiconductor Inspection
Micron-level geometric deviations can lead to incorrect defect classification. Even minor optical distortion can significantly increase defect misjudgment rates.
Precision Measurement
When the object's position shifts slightly, conventional lenses introduce perspective changes, causing measurement results to fluctuate.
Reflective Surface Inspection
Mirror-like materials often produce overexposed hotspots, creating blind spots in quality inspection.
AI Vision Training
If training data comes from distorted images, the AI model itself becomes compromised.
What Is a Telecentric Lens and Why It Matters
Telecentric lenses are designed so that the chief rays travel parallel to the optical axis. This optical structure eliminates perspective distortion and maintains constant magnification across the entire field of view.
This enables:
- Zero perspective error
- Constant magnification
- Ultra-low distortion
- Highly repeatable measurements
Telecentric lenses are widely used in:
- Semiconductor wafer inspection
- PCB and LCD panel inspection
- Precision metrology systems
- AI vision training platforms
- Lithium battery inspection
- Advanced material sorting
Why Choose Contrastech Telecentric Lenses
Ultra-Low Distortion Optical Design
Distortion levels as low as ≤0.01%, meeting semiconductor-grade inspection requirements.
Support for Ultra-High-Resolution Sensors
- Compatible with up to 151MP area sensors
- Supports 24K line-scan cameras
Extra-Large Field of View
Maximum field of view up to 390 mm, ideal for large PCB inspection, LCD inspection, and large-area material analysis.
Wide Sensor Compatibility
Supports sensor sizes from 1/2.5", 1", 2/3", APS-C to full-frame with image circles up to 88 mm.
Broad Magnification Range
Magnification options from 0.024X – 8X, supporting both macro inspection and micron-level measurement.
Advanced Spectrum Solutions
UV Telecentric
- Semiconductor inspection
- Micro-crack detection
- Precision metrology
SWIR Telecentric
- Material penetration inspection
- Silicon wafer analysis
- Electronic packaging inspection
Bi-Telecentric
- Sub-pixel dimensional measurement
- Precision metrology systems
- Ultra-stable machine vision
Industry Feedback
How to Choose the Right Telecentric Lens
- Sensor size
- Required measurement accuracy
- Field of view
- Spectral requirements (UV / Visible / SWIR)
- Whether bi-telecentric optics are required
Without proper matching, even high-end vision systems may fail to achieve expected performance.
Find the Right Telecentric Solution
Contrastech can help design the optimal telecentric optical solution for semiconductor inspection, AI vision systems, and precision metrology.
Contact Us for Your Application