Fresnel lenses

Diffractive optical structures are characterized by an extremely flat architecture, high design flexibility and large dispersion. Diffractive micro lenses are used e.g. as front lenses in chromatic confocal distance sensors. The fabrication of diffractive micro lenses by mask projection methods using an F2-laser system provides high flexibility concerning design and material selection. The method allows the superimposing of structures onto non-planar substrates even at a late stage of a production process. The diffractive lenses feature high precision, good surface quality and almost diffraction limited performance.

Fresnel lens, fused silica	Fresnel lens, BK7 glass

Further information:

T. Fricke-Begemann, J.Ihlemann, J. Meinertz
Diffraktive Mikrolinsen: Herstellung durch direkte Laserablation
Proc. DGaO 2006 P16 (alternatively as Pdf-Document )

T. Fricke-Begemann, J. Meinertz, J. Ihlemann
Fabrication of diffractive micro lenses by direct laser ablation
Proc. EOS 2006 p.114