Air_spaced Achromatic Doublets

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.