30 Sep 2009 Achromatic lenses are very common type of viewer lenses, they consist of two or more lenses elements, which have been corrected for chromatic aberration with respect to two selected wavelengths Specification of Achromatic Lens
Design Wavelength: upon request
Diameter Tolerance (mm):+0.0/-0.2 (General), +0.0/-0.02 (High Precision)
Paraxial Focal Length Tolerance (mm):±2%
Centration:3 arc min
Clear Aperture :80% (Small Size), >95% (Large Size)
Surface Figure (per 25mm@632.8nm):<1.5λ, (General), <λ/4 (High Precision)
IRR ( @632.8nm):<λ/4 (General), <λ/10 (High Precision)
Surface Quality:60/40 (General), 10/5 (High Precision)
Bevel (face width x 45．):<0.25mm
Coating: upon request
Note:
(1). Please refer to our web for list of standard Achromatic Lenses.
(2). Custom-made Achromatic Lenses are available from FOCtek.
(3). FOCtek can design Achromatic Lenses for you according your requirement. |
