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 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. Senba can help customers to design and mould the lens they want.
Senbais one of the most professional fresnel lens suppliersin Chinafor more than 15 years. We are the most advanced factory with complete categories. With strong R&D center, there are digital type and analog type, dual elements and four elements for you choose. The market cover domestic market, Korean, Amertica, Turkey and Europe.
Send product request
Other supplier products
 |
HDPE Pir Motion Detector Lens S9006 for PIR sensor Module | 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 techn... |
 |
Mini SMD Digital Pyroelectric Infrared Sensors S18-L242B-2 | Owning very strong R&D Center, Senba can research and develop the pyroelectric infrared sensor independently. Among those pir sensor manufactur... |
 |
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 | Output Type Number Of Elements Model Window Size (MM) Detection Range(M) Specialty Lighting Doorbell IP Camera Home applicati... |
 |
Analog Output 3- 15V Passive Infrared Sensor D204B | Overview of pir sensor d204b D204B come standard with enhanced immunity to EMI (Electro-Magnetic Interference). It widely used in security system. ... |
Same products
 |
China manufacturer Pressure Gauge HS75668 for power generation | Seller: 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 | Seller: 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 | Seller: 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 | Seller: 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 | Seller: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China Yoyik Upper bearing positioning sleeve DLD320-20X2 for turbine generatorSold by YOYIK. Dey... |
