The Fresnel lens independently developed by horn

The more the viewing area, the larger the detection Angle (for example, the detection Angle of only one pyroelectric infrared sensor will not exceed 180 degrees).The more the horizontal viewing area, the smaller the Angle of detecting the horizontal area, the more accurate it is,

Fresnel lenses are generally designed at (0.65-1, 5mm) thickness, the surface is processed into circles from small to large.The less blind spots are detected, the serrated edges appear from the profile, and the top arc lines of each serrated edge are composed of arcs of the same size.The more layers in the vertical direction, the more distance stages in the detection. (generally, a wide-angle Fresnel lens design can detect long distance, medium distance and short distance. This design is generally used as a curtain passive infrared detector.The Fresnel lens independently developed and designed by haun has the characteristics of high precision, long detection range, strong anti-interference ability and low energy loss, etc. In practical application, however, this also needs to be combined with the position of the pyroelectric infrared probe and the concentric circles from shallow to deep.It can also be designed to be symmetrical and arranged in vertical columns, so that the detection distance will be different for different positions, and revolutionary improvements have been made in product performance, stability and accuracy.This can be designed according to customer requirements.Because the lens is restricted by the field of view of the infrared probe, there are various Fresnel lenses on the market

Fresnel optical lens lens area is also limited. The circular shape Fresnel lens is cut into small pieces of shape arranged in a regular manner to form a multilayer multi-vision Fresnel lens.From the appearance of the classification: strip, square, round, vertical and horizontal induction Angle limited, curtain type.