hese lenses have considerably reduced values of spherical aberrations. Best used to replace single components where performance must be improved. They are made of BK7, fused silica and CaF2. Special focusing systems can be designed by our engineers upon request.
Achromatic Lens
|
Combinations of
Two Optical Grade Glasses |
Diameter Size
|
smallest 5 mm
|
Diameter Tolerance
|
+0.0, -0.05mm
|
Paraxial Focal Length
|
±2%
|
Cerntration
|
5 arc minutes
|
Clear Aperture
|
>80%
|
Surface Figure:Power(N)
|
<3
|
S Surface Irregularity (N)
|
<0.5
|
Surface Quality
|
40/20 scratch and dig
|
Bevel
|
< 0.2 mm x 45°
|
Coating
|
Single layer MgF2 broadband AR
|