The achromatic-doublet consists of a positive low-index(crown)
and a negative high-index(flint)lens. These lenses are computer-optimized
and exhibit excellent paraxial performance, minimal spherical aberration,
coma and smallest chromatic aberration.
Specifications
| Material |
OPtical
crown and flint glasses or equivalent |
| Focal
Length Tolerance |
2% |
| Fringes
Power |
1-5 |
| Fringes
Irregularity |
0.2-0.5 |
| Diameter
Tolerance |
0/-
0.20 mm |
| Center
Thickness(Tc) Tolerance |
0/-
0.25 mm |
| Centration
|
3
arc minutes |
| Clear
Aperture |
90%
of diameter |
| Surface
Quality: |
60-40
scratch and dig |
| Coating |
Singe-layer
MgF2 AR Coateds |
Note: Products are available upon request.
