Fresnel Lens
With our own R&D Center, SenbaSensor can do a lot of basic research, and develop our chinese pirsensor and other products with our unique technologies. Our manufacturing people pay a great deal of attention to the product quality, and our factory has become ISO9001 and ISO14001 certified.
Fresnel lens, also known as threaded lens, Fresnel lens is mostly made of polyolefin material, the surface of the lens is smooth, and the other side is filled with concentric circles from small to large. Its texture is designed to utilize the interference of light and to be based on relative sensitivity and acceptance angle requirements. The quality requirement of the lens is very high. A good lens must have a smooth surface, clear texture. Its thickness varies with the application and normally about 0.6 mm. The lens characteristics are wider surface, thinner and farther detection distance.
As one of the leading large fresnel lens suppliers, there are kinds of large fresnel lens for salessuch as large plastic fresnel lens, plastic fresnel lens, etc.
There are two functions of Fresnel lens: one is the focusing effect; the other is to divide the detection area into several bright and dark areas, so that the moving object entering the detection area can produce the change of heat release on the PIR in the form of temperature change. It is what we called Infrared signal. We can say that fresnel lens help to strengthen the infrared signal and to make PIR work well.
The Fresnel lens is a convex lens that is equivalent to infrared and visible light in many cases, and the effect is better, but the cost is much lower than that of a conventional convex lens. It is often used in applications where accuracy is not critical, such as slide projectors, thin film magnifiers, infrared detectors, etc.
Normally the lens’ shapes are dome and flat. But these years as the smart home is more and more popular, different lens are needed to match with different controllers. Senba can help customers to design and mould the lens they want.
Send product request
Other supplier products
 |
Outdoor Human Motion Sensor D203S | Owning very strong R&D Center, Senba can research and develop the pyroelectric infrared sensor independently. Among those pir sensor manufactur... |
 |
Metal Casing Good Reliablity Phototransistor D57 Series for Light Control Lamp | Owning very strong R&D Center, Senba can research and develop the pyroelectric infrared sensor independently. Among those pir sensor manufactur... |
 |
Low Power Consumption Infrared Motion Sensor for Lighting G2X2 | An Overview of Low pir sensor power consumptionInfrared Motion Sensor for Lighting G2X2 G2X2, with the low power pir motion sensor module, is quad ... |
 |
3Pins Electronic Components PIR BL312 From Senba Factory | Overview Senbais the specialist PIR manufacturer for more than 15 years. We are the most advanced factory with complete categories. With strong R&... |
 |
Low Differential Pressure Transmitter/Transducer | Low Differential Pressure Transmitter For measuring very small pressure differences between two measurement points either side of a ventilation fan... |
