Achromatic Lenses are used to minimize or eliminate chromatic aberration. The achromatic design also helps minimize spherical aberrations. Achromatic Lenses are ideal for a range of applications, including fluorescence microscopy, image relay, inspection, or spectroscopy. An Achromatic Lens, which is often designed by either cementing two elements together or mounting the two elements in a housing, creates smaller spot sizes than comparable singlet lenses.
Specification

Material Crow glass & Flint glass
Diameter 6.0mm-200mm
Diameter Tolerance ±0.1mm
Thickness 5mm-50mm
Thickness Tolerance ±0.05mm
Surface Quality 60/40 40/20
Surface Flatness lambda~lambda/8
Bevel 0.25mm*45°
Centration  < 3arc min
Coating  as the customer's requirement