Lenses have many applications ranging from the simple collection of the scanning of laser beams to precise imaging and image transfer.
DELN can provide all kinds of spherical and cylindrical lenses, usually we can offer.
Spherical: Rectangular, circular, plano-convex, plano-concave, double-convex, double-concave, meniscus, achromatic, dome lens, rod lens, ball lens, half ball
Cylindrical: Rectangular, circular, plano-convex, plano-concave, achromatic
Assembly: Doublet, triplet, customer designed special lens kit
Mixture: One side spherical, the other side cylindrical
Usually lenses are not only used in visible band, but also in IR band and UV band, that means special material should be used. Now, DELN can offer lenses made of various materials such as CaF2, MgF2, Sapphire, Silicon, Germanium, ZnSe and etc. DELN can also provide various coatings for lenses upon your request. Dimension And Tolerance 1mm to 500mm,+0/-0.1mm Thickness Tolerance ±0.2mm Radius Tolerance ±0.5% Surface Quality 60/40 scratch and dig or better Power(fringe@633nm) 3 Irregularity(fringe@633nm) 0.5 Centration <3 arc minutes Focal Length Tolerance ±2% Clear Aperture >90% Chamfer Protective <0.5mmx45deg
Specifications
The frequently used AR coatings are as below:
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