Fresnel Lenses

Fresnel lenses reduce the amount of material required compared to a conventional lens structure by breaking the lens into a set of concentric angular sections known as Fresnel zones.

Fresnel lens structures can be formed onto the surface of thin film materials using a UV coating process to produce thin, flexible lens structures.

Applications for thin film Fresnel lenses

• Thin Film Fresnel lenses are used as solar concentration devices and in architectural lighting to produce uniform area lighting effects from point light sources such as L.E.D’s

• Thin film lenses are an increasingly attractive alternative to cast Fresnel lenses. With our patented InADiT process, we can now produce high quality lenses with efficiencies of up to 85% at a fraction of the cost of similar quality cast lenses.

Point Focus Lenses

Circular in form, point focus or “2D” lenses focus light to a point (or collimate a point light source)

Microsharp has the capability to produce lenses with diameters from 1cm to 20cm and varying focal lengths with optical efficiencies of up to 85%.

For solar Concentrator applications, effective concentration rations of up X120 are achievable

Linear Fresnel Lenses

These lenses focus light in one dimension only.

Microsharp produces structures of up to 1.5m wide that can achieve effective concentration ratios of up to X25

Production Capabilities
Microsharp can produce linear lenses with the following characteristics:

• Lens Size (width) Current maximum 150cm

• Focal length 10cm – 100cm

• Concentration factor up to X25

• Optical efficiency up to 90% (typically 85%)

• Film thickness 70 micron – 250micron

• Structure depth Approximately 35 micron

• Base film PET, PMMA, TAC

• Refractive index 1.5 – 1.8

• Format Continuous film rolls