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Lens Overview



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.

Specifications

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([email protected])

3

Irregularity([email protected])

0.5

Centration

<3 arc minutes

Focal Length Tolerance

±2%

Clear Aperture

>90%

Chamfer

Protective <0.5mmx45deg



The frequently used AR coatings are as below:


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