Imaging and producing parallel rays .It is suitable for projector,epidiascope and so on

Fresnel lens Size: 340x340mm Focal length: 170 Thickness: 2mm Groove pitch: 0.5mm

Fresnel lens

Material: PMMASize: 340x340mmFocal length: 170Thickness: 2mm

Groove pitch: 0.5mm

Also with 240x240mm,   1206x126mm, 1000x860mm, 1040x780mm, 400x320mm  etc.

fresnel lens