Fresnel lenses are important compact optical components, which are comprised of multiple
faceted concentric rings. These lenses are the most widely utilized diffractive optical element …

Pyroelectric infrared (PIR) sensors are widely used as a presence trigger, but the analog
output of PIR sensors depends on several other aspects, including the distance of the body …

Passive IR (PIR) sensors are excellent devices for wireless sensor networks (WSN), being
low-cost, low-power, and presenting a small form factor. PIR sensors are widely used as a …

Pyroelectric infrared (PIR) sensors are widely used as a simple but powerful people
presence triggers, eg, automatic lighting systems. In particular, by alternating the effective …

Device-free localization (DFL) techniques based on pyroelectric infrared (PIR) sensors have
attracted much attention due to their advantages of low cost, low power consumption, and …

As technological components continue to utilize space effectively within devices without
compromise to their operational efficiency, the relevance of accurate and precise parts with …

The article reviews signal processing applications of Pyroelectric Infrared (PIR) sensors with
the main focus on the respiration and pulse rate detection. Respiration and pulse rates are …

High fill factor for Fresnel lens arrays has been achieved with the aid of polygonal lenses.
This has been done for both circular trimmed lenses and full polygonal lenses, both of which …

We present PyroSense, the first-of-its-kind system that enables fine-grained 3D posture
reconstruction using ubiquitous COTS passive infrared sensor (PIR sensor). PyroSense …

Surveillance plays a crucial role in day-to-day life. A typical surveillance system continuously
monitors its vicinity and stores the surveillance data locally. This may end up in lots of …