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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. Additionally, because the lens is so thin little light is lost by absorption. Fresnel Lenses can be desirable for use in condenser and lighting systems to collimate and collect light. Fresnel lenses can be used as magnifiers, but this is not recommended unless the thin profile and light weight is absolutely necessary.

Knight Optical offers a range of stock Fresnel Lenses made from PMMA Acrylic. Our stock range of PMMA Fresnel Lenses comes in two grades. Our “standard range” start from 5mm f.l x 5mm diameter aperture up to 254mm f.l x 152mm dia aperture. 

Items 21-30 of 65

Name Focal Length (mm) Clear Aperture (mm) Overall Size (mm) Facet Width (mm) Thickness (mm) Type Price Buy
LFQ300300 300 300 dia. 300x300 0.5 2 Precision
US$111.20
LFQ275400 275 400 dia 400x400 0.5 2 Precision
US$183.48
LFQ25125 25 125 dia. 125x125 0.2 2 Precision
US$83.40
LFQ250500 250 500 dia 500x500 0.5 2 Precision
US$214.06
LFQ20100 20 100 dia. 100x100 0.5 2 Precision
US$83.40
LFQ200401 200 400 dia. 400x400 0.5 2 Precision
US$183.48
LFQ150301 150 300 dia. 300x300 0.5 2 Precision
US$111.20
LFQ100200 100 200 dia. 200x200 0.5 2 Precision
US$111.20
LFQ0945 9 45. dia 45x45 0.1 2 Precision
US$83.40
LFQ0840 8 40. dia 40x40 0.1 2 Precision
US$83.40
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Fresnel Lenses

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