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Knight Optical’s Fresnel Lenses for Magnification Displays

13 May 2020

An exceptional component offered by Knight Optical – the leading supplier in high-quality, metrology-tested optics – is the Fresnel Lens; popular for a range of uses, from integration with traffic lights to use in photovoltaics and magnification displays.

 Our Fresnel Lens' formation consists of a flat surface with interspaced, concentric steps whereby each step corresponds to the surface of a conventional lens. What's more, Fresnel Lenses feature a typical focal length equivalent to a traditional lens, but with a fraction of the thickness. And, because the lens is so thin, little light is lost by absorption. 

 Here at Knight Optical, we stock a wide variety of Fresnel Lenses – from PMMA Acrylic, PMMA Cylindrical, Glass, Reverse Configurations (for solar concentration) and Lenticular types. Popular amongst specifiers working on magnification displays is our high-quality PMMA Acrylic Fresnel Lenses, thanks to the substrate's light weight, which makes it easy to integrate into larger-scale devices. Not only are our Fresnel Lenses offered in a range of shapes and sizes from stock, but we also supply customers with Custom-Made Fresnel Lenses manufactured specifically to meet the needs of their end product. 

 Our stock range varies from 5mm to 650mm apertures and comprises two types – standard and precision ranges. The precision varieties have tighter tolerances with improved surface quality, and are uncoated; however, Antireflective (AR) Coatings can be applied at short notice.

 Typical specs:

Material: PMMA Acrylic/Borosilicate

Centre thickness: +/- 0.2mm

Clear aperture: Nominal

Focal length:

Standard range: ± 5%

Precision range:  ± 2% typically (± 5% manufacturing data)

Design condition:  Parallel light on the grooved side.

 First-Class Quality 

Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department. 

To discover how we can enhance your supply chain experience and to learn more about our stock and custom-made Fresnel Lenses, contact a member of our technical sales team today. 

 UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk 

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com 

Tel +001 401-583-7846 

 View our QA and Metrology information

CONTACT DETAILS
Knight Optical Ltd
Roebuck Business Park
Harrietsham
Kent
ME17 1AB
United Kingdom
Tel: 44 (0)1622 859444
Fax: 44 (0)1622 859 555
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