Fresnel Lens
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.
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. As one of the fresnel lens suppliers,Senba can help customers to design and mould the lens they want.
在线联系供应商
Other supplier products
 |
Fresnel Lens | We have large fresnel lens for sale! Fresnel lens, also known as threaded lens, Fresnel lens is mostly made of polyolefin material, the surface of ... |
 |
Digital PIR Sensor | Output Type Number Of Elements Model Window Size (MM) Detection Range (M) No Of Pins Specialty Digital output Dual Elements ... |
 |
Digital PIR Sensor | What ispir sensor digital? Specifications ofpyroelectric passive infrared sensor Output Type Number Of Elements Model Window Size (MM) ... |
 |
3Pins Electronic Components PIR BL312 From Senba Factory | Senba Sensing Technology Co.,Ltd. is a professional china sensor manufacturer. We provide Infrared Thermopile Sensor, Digital PIR Sensor, passive i... |
 |
Optocoupler Semiconductor Device LCR-0202 Series for Electric Circuit | Overview Optocoupler is a Optoelectronic devices which use the current changes to control the resistance change. It is a Linear optocoupler which ... |
Same products
 |
China manufacturer Pressure Gauge HS75668 for power generation | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China manufacturer Pressure Gauge HS75668 for power generation It is YOYIK special sale. Deyang ... |
 |
"China factory Vacuum Switch HS70595 for power station | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China factory Vacuum Switch HS70595 for power station Our company mainly serves thermal power pl... |
 |
China made TSI Preamplifier CON021/916-240 for power plant | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | China made TSI Preamplifier CON021/916-240 for power plant Dongfang Yoyik has advanced technology... |
 |
China manufacturer Preamplifier for power generation | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China manufacturer Preamplifier for power generationIs to use the generator sets of professiona... |
 |
China Yoyik Upper bearing positioning sleeve DLD320-20X2 for turbine generator | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China Yoyik Upper bearing positioning sleeve DLD320-20X2 for turbine generatorSold by YOYIK. Dey... |
