pyroelectric infrared signal is refracted (reflected) on the PIR; the second is the function of dividing the detection area into
several bright and dark areas, so that the moving objects entering the detection area can change in the form of temperature
Generate a varying pyroelectric infrared signal on the PIR. Fresnel lens is a very widely used optical element, its design and
manufacturing design to multiple technical fields, including optical engineering, polymer material engineering, CNC machining,
diamond turning process, nickel plating process; molding, injection molding, Casting and other manufacturing processes.
Features:
1.designed for passive infrared sensor applications
2.Well suited for compact, low profile sensors
3.Can be used in applications involving security, lighting controls and environmental controls
4.Optimized for dual element pyroelectric devices
5.White light immunity to reduce false triggers
6.UV resistant for outdoor applications
7.Designed for uniform sensitivity to reduce electronic gain
Functions:
The Fresnel lens function has two: One, the focusing action, soon hotly releases the infrared signal refraction (reflection) on PIR, the second function is divides into the search coverage in certain area pellucidae and the dark area, causes to enter the search coverage the motion object to be able to produce by the temperature change form on PIR changes releases the infrared signal hotly.
Application areas:
1. Projection display: Fresnel projection TV, rear projection Fresnel screen, overhead projector, collimator;
2. Concentrating light: Fresnel lens for solar energy, Fresnel spotlight for photography, Fresnel magnifying glass;
3. Aviation navigation: Fresnel lens for lighthouse, Fresnel flight simulation;
4. Scientific research: laser detection system, etc.;
5.Infrared detection: passive movement;
6. Lighting optics: car headlights, traffic signs, optical landing systems.