Fresnel lenses consist of a flat surface with interspaced, concentric steps whereby each step corresponds to the surface of a conventional lens. Each step thereby acts as a refractive surface, much like a prism. This gives the fresnel lens a common focal length equivalent to a traditional lens, but with a fraction of the thickness. ...
Specifications
|
Material: |
PMMA Acrylic |
Lens Type: |
Spherical |
Focal Length: |
100 mm |
Facet Spacing: |
0.5 mm |
Clear Aperture: |
200 mm |