PIR OPTICAL LENS SOLUTIONS — FROM 3 M OFFICES TO 40 M INDUSTRIAL APPLICATIONS
Our PIR (Passive Infrared) optical lens solutions are engineered to perform reliably across diverse environments — from low-ceiling office spaces to high-mount industrial and outdoor installations up to 40 meters. Through precise Fresnel geometry, SPDT mold fabrication, and material optimization, we ensure consistent infrared energy distribution, stable detection sensitivity, and minimal false triggers at any height.
PIR Optical Lens Solutions — From 3 m Offices to 40 m Industrial Applications
At Aubor Optoelectronics, we develop and manufacture Passive Infrared (PIR) optical lenses that perform reliably across all environments — from 3 m office ceilings to 40 m high-bay industrial and outdoor installations.
Our mission is to transform what was once seen as a simple plastic part into a high-precision optical component.
Every Aubor PIR lens is designed around three pillars:
Accurate Fresnel geometry for predictable infrared energy distribution.
Single-Point Diamond Turning (SPDT) master molds for sub-micron surface precision.
Controlled injection molding and polymer selection to ensure repeatable performance.
How PIR Sensing Works
A PIR (Passive Infrared) sensor detects motion by measuring changes in infrared radiation emitted by warm objects, especially the human body.
When a person moves across the detection field, the PIR element receives alternating levels of infrared energy — creating a voltage signal that the circuit interprets as “motion.”
The PIR lens plays a crucial role in this process.
It doesn’t form a visual image; instead, it divides the infrared field into multiple zones and focuses radiation from each zone onto the pyroelectric detector.
This design enables the sensor to differentiate between motion and static backgrounds, making the lens the optical “eye” of the entire system.
Without precise lens geometry, the sensor’s field of view becomes uneven, resulting in false triggers or missed detections — especially in high-mount installations where signal strength naturally decays with distance.
Tailored Designs for Every Height
Different installation heights require entirely different optical behaviors:
3 – 5 m — wide field of view and soft transitions for office, home, and hallway automation.
6 – 12 m — balanced long-range sensitivity for commercial lighting and security systems.
20 – 40 m — extended focal design for warehouses, tunnels, and outdoor surveillance.
Each design is simulated, optimized, and verified to maintain energy symmetry and stable detection sensitivity at its intended range.
While some brands — like NIKO — claim 3 mm-thin designs that maintain full performance, we remain cautious. In practice, optical behavior follows physics: extreme compactness often compromises infrared uniformity. We believe precision isn’t about being thinner — it’s about being consistently accurate.
Why Aubor Lenses Perform Differently
Our SPDT-machined molds achieve:
Groove form error ≤ ±2 µm
Surface roughness Ra < 10 nm
Smooth zone transitions without edge scatter
Such precision directly defines how infrared energy is collected and projected across detection zones.
Even minor deviations in groove geometry can shift focus points, causing uneven energy intensity on the pyroelectric element.
SPDT master molds eliminate this uncertainty by creating perfectly repeatable surface curves, ensuring that each Fresnel zone contributes a balanced share of energy.
The result is higher signal-to-noise ratio (SNR), more stable sensitivity, and better detection uniformity — particularly critical in long-distance (12 m to 40 m) installations where infrared energy loss is unavoidable.
Through SPDT, Aubor lenses achieve not only mechanical precision but optical control over energy and sensitivity, bridging the gap between polymer manufacturing and scientific instrumentation.
Engineering Predictability into Every Lens
From offices to airports, from smart lighting to industrial safety, Aubor helps global clients achieve optical reliability that scales with height and complexity.
Because when it comes to infrared sensing, every meter — and every micron — matters.
