HDPE fresnel lens magnifier
HDPE fresnel lens magnifier
The Fresnel lens, simply say to be in the lens side have equi-distant tooth tattoo. Through these tooth tattoo, can achieve to specified spectrum light band tong (reflecting or refraction) role. The traditional grinding optical equipment band-pass optical filters are expensive. The Fresnel lens can greatly reduce costs. A typical example is PIR (passive infrared detector). PIR used widely in alarm.
product model
8702-1
8702-2
8702-4
8708-4
8719
8727-1
8745-2
specification
44*149mm
38.7*104*0.6mm
23.6*65.5*0.6mm
32*66*76mm
34*53.5*0.6mm
18*37*0.7mm
37*74*0.5mm
focal length
23mm
23mm
23mm
/
22mm…