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pir sensor fresnel lens 8002-2
brief introduction:
The Fresnel lens (Fresnel lens) is by the polyolefin material injection molding a wafer, lens surface is smooth on one side, the other side the burn from concentric circles, its texture is to use light dry involving interference shot and according to the relative sensitivity and receiving Angle requirements to design, very tall to the requirement of lens, a high quality lens must be the surface is bright and clean, texture clear, its thickness is in commonly 1 mm or so, characteristic of the area is larger, thin thickness and detection distance
effect:
The Fresnel lens effect to have two: one is focusing effect, the pyroelectric infrared signal refraction (reflection) in PIR, the second is the role detection area is divided into several Ming area and dark area, make into the detection region of the moving object to temperature change in the form of the PIR changes pyroelectric infrared signal.
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Fast shipping1>.We will make the shipment within three days after received the payment.
2>.Normally, we advise to ship the goodfs via DHL.
We also can ship to you by UPS, FedEx, EMS, TNT. Anyway, you can select which is your preferred ways.3>.We are not responsible for an item lost or damaged during transit therefore insurance is highly recommended although optional.
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pir sensor fresnel lens 8002-2