The Challenge of AOI Lighting: Uneven Illumination Leads to False Detection
In Automated Optical Inspection (AOI) systems, the stability and uniformity of light directly determine image accuracy.
When bright spots, shadows, or uneven light distribution occur, even the most advanced algorithms can produce false detections, missed defects, or inconsistent yield rates.
Engineers developing AOI lighting modules often face the following challenges:
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LED hotspots that cause image glare and reading errors
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Insufficient light diffusion, resulting in shadows or uneven illumination
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Limited design space that restricts optical layer thickness and stack optimization
YONGTEK AOI Diffuser Films and Diffuser Sheets are designed to solve these critical issues.
They enhance light uniformity, minimize brightness variation, and improve overall image stability — helping AOI inspection systems achieve precise, consistent results.
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AOI Diffuser Film / Sheet — Designed for High Light Uniformity and Stability
The YONGTEK AOI Diffuser Series transforms harsh LED point sources into smooth, evenly distributed surface lighting,
ensuring stable brightness and balanced contrast for AOI inspection systems.
Key Product Advantages:
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✅ Multiple transmittance and haze options for optical design flexibility
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✅ Superior diffusion performance with controlled scattering angle
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✅ Available in film type (0.2–0.3 mm) and sheet type (1.2–1.8 mm) thickness ranges
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✅ Compatible with both direct-lit and edge-lit AOI lighting modules
These diffusers can be flexibly applied in various AOI inspection machines, vision lighting systems, and LED backlight modules,
meeting both uniformity and space-saving design requirements.
Our Cutting Service:
We offer professional cutting services within the standard sheet size of 1220 × 1220 mm.
Sheets can be precisely cut or drilled according to customer drawings, ensuring accurate dimensions and shapes tailored to specific product designs.
Trusted Partner to Global AOI Equipment Manufacturers
With over 15 years of experience in optical diffuser film and sheet manufacturing,
YONGTEK has become a trusted long-term partner to AOI lighting and inspection equipment manufacturers worldwide.
Our materials are widely used in:
- Semiconductor AOI lighting modules
- PCB and precision vision inspection systems
- Industrial optical assemblies requiring consistent, uniform light
Consult YONGTEK — Build the Ideal AOI Light Source
If you are developing an AOI or vision inspection light module,
the YONGTEK engineering team can help you select the right combination of diffuser, reflector, and light guide materials,
and provide customized optical recommendations tailored to your design needs.
Contact YONGTEK to request AOI diffuser samples or technical consultation.
Our engineers will help you compare haze levels, thickness options, and light uniformity performance,
so you can build a brighter, more stable, and more precise AOI lighting solution.
