Fresnel lenses

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Part no. Zone Total height [mm] Total diameter [mm] recommended mounting angle ca. [°] Style Details

1 9.5 10.4 wall/ceiling 19 Cap plus >>


3 9.5 10.4 wall 90 Cap plus >>


4 8.65 10.4 wall/ceiling 61 Cap plus >>


7 8.65 10.4 wall/ceiling 90 Cap plus >>


9 10.0 14.8 ceiling 100 Cap plus >>


1 14.45 17.0 wall/ceiling 16 Cap plus >>


10 11.5 17.0 wall 120 Cap plus >>


26 12.37 17.0 ceiling 100 Cap plus >>


16 12.7 23.0 x 11.0 wall 105 PCB catch plus >>

SAA-Pe.cover lens-4

16 12.0 24.0 x 15.0 wall 110 PCB catch plus >>

To detect moving objects with a pyrosensor the heat radiation of the object has to be imaged into the plane in which the pyroelectric elements are located. Usually this is done with the help of fresnel lenses. These lenses are made of high-density polyethylene (HD-PE). Due to their special construction these lenses are very thin. This is necessary because the heat radiation of the human body is strongly attenuated while passing the lens material. The shorter the optical path through the lens, the less the damping of the radiation. A Fresnel lens is usually built of several lens sections, which are located on a curved surface. The sections are oriented in different directions in space. By proper design of the different section orientations, the sensitivity angle of the movement detector can be adjusted.

NICERA (Nippon Ceramic Co., Ltd) is a Japanese company, founded in1975 and located in Tottori area. The core products of NICERA are ceramic devices and semiconductor materials which are used to make infrared sensors to protect property and life, ultrasonic sensor for car safety and theft prevention, Hall sensors for detecting magnetic fields and ferrite material for producing coils.

contact technique

Dr. Thomas Wolf
Fon: +49 7452 6007 23
Fax: +49 7452 6007 823

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