Fresnel lenses made of plastic

Fresnel lenses

 

What are Fresnel lenses?

A Fresnel lens is a special type of lens that was originally developed by the French physicist Augustin-Jean Fresnel. Fresnel lenses are optical lenses whose refractive surfaces are arranged in several concentric rings or steps. They are suitable for focussing incident light or for collimating point light sources.

 

Advantages

Thanks to their special design, Fresnel lenses can deflect light in a similar way to thicker conventional optical lenses. The main advantages of Fresnel lenses are therefore their reduced thickness and space requirements as well as their lower weight.

The reduced thickness of Fresnel lenses is also advantageous for an efficient and cost-effective injection moulding process in large quantities.

 

Areas of application:

• Sensors
• Light barriers
• Overhead projectors
• Lighting

 

Injection moulding of Fresnel lenses

The injection moulding process is very suitable for the cost-effective production of spherical or aspherical Fresnel lenses and Fresnel double lenses made of optical plastic. Polymeroptix has many years of experience in the production of Fresnel lenses. Our injection moulding of Fresnel lenses can economically produce quantities from a few hundred to several tens of thousands per year. We also offer prototypes of Fresnel lenses. If only a few prototypes are required, it often makes sense to use diamond-turned parts. For larger quantities, it is often worth building a prototype tool and producing the parts by injection moulding.