Fresnel Lens
Fresnel lens, also known as threaded lens, plastic Fresnellens 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.
There are two functions of large plastic 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. As one of the most professional fresnel lens suppliersin China, Senba can help customers to design and mould the lens they want.
Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality pir sensor analog. If you want to know more details, just feel free to contact us!
Отправить запрос, связаться с поставщиком
Другие товары поставщика
 |
6Pins Long Rang Human Motion Detector HM612 for Smart Light Switch | Overview of pir human motion sensor HM612 is a newest smart digital motion detector. This Smart digital detector offers a complete motion detector ... |
 |
BQ404 Quad Elements type PIR Sensor | Senba Sensing Technology Co Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components, such as intelligent pi... |
 |
PIR Sensor Module | Owning very strong R&D Center, Senba can research and develop the passive infrared sensorindependently. Among those chinese pirsensor manufactu... |
 |
Analog PIR Sensor | Senba Sensing Technology Co Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components, such as intelligent pi... |
 |
Digital PIR Sensor | Senba Sensing Technology Co Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components, such as intelligent pi... |
Похожие товары
 |
LVDT Displacement Sensors LVDT-150-6 for thermal power plant | Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "Made in China LVDT Displacement Sensors LVDT-150-6 for thermal power plantIs YOYIK for the use o... |
 |
honeycomb filter | Продавец: Xuhaifa Filter Co., Ltd. | honeycomb filter Honeycomb Filter Featuring a unique , these filters provide high surface... |
 |
China made Vibration sensorHD-ST-A3-B3 for power plant | Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China made Vibration sensorHD-ST-A3-B3 for power plant is an exclusive product for power units o... |
 |
GE FANUC PLC Module IC693MDL340 | Продавец: 840499 | The IC693MDL340 is a 120 volt, 0.5 Amp AC Output Module of the Series 90-30 manufactured by GE Fa... |
 |
China Manufacturer Axial seal DLD320-20X2 for steam turbine | Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | China Manufacturer Axial seal DLD320-20X2 for steam turbineSelection of advanced technology, abso... |
