What Are LODIFF PIR Fresnel Lenses And How Can They Enhance Alarm Sensor Performance?
What Are LODIFF PIR Fresnel Lenses – LODIFF Fresnel lenses are a patented optical technology developed by Fresnel Technologies to enhance PIR performance in demanding environments where efficiency, precision and stability are critical.
Unlike standard Fresnel lenses that rely on uniform groove geometry, LODIFF lenses use individually engineered aspheric grooves with variable widths across the lens surface. With LODIFF, while groove width changes to suit optical requirements, groove depth remains consistent. This structure significantly reduces diffraction effects and improves energy transmission, delivering sharper focusing and more efficient use of available infrared energy, especially within the 8–14-micron wavelength band associated with human body heat.
In PIR detectors, LODIFF lenses improve sensitivity and detection accuracy by better concentrating infrared signals onto the sensor element. This allows for longer detection ranges, improved target definition and more reliable discrimination between genuine movement and background noise. As a result, the technology is commonly used in higher-grade commercial detectors, including professional systems such as Paradox ProLine, where optical performance directly affects detection reliability.
LODIFF lenses are typically manufactured using POLY IR, a proprietary infrared-transmitting polymer also developed by Fresnel Technologies. This material provides stable transmission characteristics, environmental durability and resistance to temperature and humidity changes, making it suitable for both indoor and outdoor devices.
You can learn more about Fresnel PIR arrays here or find more SEN news here.
LODIFF PIR Fresnel Lenses Feature
- LODIFF aspheric Fresnel groove design with variable groove width and consistent depth
- Reduced diffraction with high infrared efficiency in the 8–14-micron range
- POLY IR infrared-transmitting material for environmental stability
- Excellent for pro-grade PIR motion detectors where performance matters
- Ideal For infrared sensing and precision lighting applications.
“What Are LODIFF PIR Fresnel Lenses And How Can They Enhance Alarm Sensor Performance?”
