Compared to the conventional spherical lens, a Fresnel lens by the lens divided into a series of concentric circles theoretically infinite number of lines (i.e., the Fresnel zone) to achieve the same optical effect, while saving the amount of material
For these lines, the overall thickness of the lens is reduced; ordinary Fresnel convex lens is actually a continuous curved surface is truncated to a section of a discontinuous change of the curvature as the surface is finely divided, so look like a circle around the lines. Fresnel lenses may in fact be regarded as a series of prisms are arranged in a ring, wherein the relatively sharp edge, and the center of the convex surface is relatively smooth.
In addition,we have some stock lenses for your option.
Note: We have the following size in stock:
Dia 1100mm Focal length 1300mm;
812mm*812mm Focal Length 890mm
We can free cut for you to the size you required .
We also have other smaller fresnel lens, for solar energy using and stage spotlight using.
The following is stock lens for smaller fresnel lens.
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