Fresnel PIR lens has two functions: 1. It is the focusing effect, that is, the pyrolysis infrared signal is refracted (reflected) on the PIR. 2. The detection area is divided into a number of bright areas and dark areas, so that the moving object entering the detection area can generate a modified pyroelectric infrared signal on the PIR in the form of temperature change.
Introduction: The PIR sensor Fresnel lens is a crucial component in passive infrared (PIR) motion sensors. This lens plays a significant role in detecting motion by focusing infrared radiation onto the sensor, allowing it to detect changes in heat signatures within its field of view. In this article, we will explore the importance of the PIR sensor Fresnel lens and how it enhances the functionality of PIR motion sensors.
What is a PIR Sensor Fresnel Lens? A PIR sensor Fresnel lens is a specially designed lens that is used in PIR motion sensors to detect infrared radiation emitted by objects in its vicinity. The lens is made up of multiple concentric rings that are designed to focus infrared radiation onto the sensor, increasing its sensitivity to changes in heat signatures. This allows the sensor to accurately detect motion and trigger an appropriate response.
Importance of the PIR Sensor Fresnel Lens: The PIR sensor Fresnel lens is a critical component in PIR motion sensors as it helps to improve the sensor's detection capabilities. By focusing infrared radiation onto the sensor, the lens enhances the sensor's sensitivity to changes in heat signatures, making it more accurate in detecting motion. This is particularly important in applications where precise motion detection is required, such as security systems and automatic lighting systems.
Benefits of Using a PIR Sensor Fresnel Lens: There are several benefits to using a PIR sensor Fresnel lens in motion sensors. Some of the key benefits include:
Improved Detection Range: The Fresnel lens helps to extend the detection range of the sensor by focusing infrared radiation onto the sensor, allowing it to detect motion at greater distances.
Enhanced Sensitivity: The lens increases the sensor's sensitivity to changes in heat signatures, making it more responsive to motion within its field of view.
Reduced False Alarms: By accurately detecting motion, the Fresnel lens helps to reduce false alarms triggered by environmental factors such as changes in temperature or sunlight.
Energy Efficiency: PIR motion sensors equipped with Fresnel lenses are more energy-efficient as they only activate in response to detected motion, helping to conserve energy and reduce operating costs.
In conclusion, the PIR sensor Fresnel lens is a crucial component in PIR motion sensors that enhances their detection capabilities and improves their overall performance. By focusing infrared radiation onto the sensor, the lens helps to increase sensitivity, extend detection range, and reduce false alarms, making it an essential tool in various applications where accurate motion detection is required.
Product classification of Fresnel PIR lens
Fresnel infrared sensor lens produced by our company is divided into five series according to the appearance and size.
1. Helical series below Φ30mm ----Easy to install, easy to conceal
2. Φ30mm or more hemispherical series ----- mostly used for ceiling lamps, large sensing angle
3. square sheet series ------ mostly used in security series, long sensing distance, large horizontal sensing angle
4. circular sheet series ----- mostly used for infrared thermometer, small diameter, small focal length
5. special shape series ------ customer special requirements open mold
