Achromatic lens is designed to limit the effects of chromatic and spherical abberation. It is corrected to bring two wavelengths(typically red and blue) into focus in the same plane. Achromatic lenses can be doublets or triplets, with two or three individual glasses cemented together.

Material--------------------BK7 Grade A or equivalent optical glasses

Design Wavelength-------480-650nm

Diameter Tolerance-------±0.1mm, ±0.15mm for Dia.≥75mm

Paraxial Focus Length-----±2% @546.1nm

Centration-----------------<3 arc minutes

Clear Aperture------------->80%

Surface Figure-------------λ/4 @632.8nm

Surface Quality------------60/40~40/20 scratches and dig

Coatings-------------------Antireflection coatings or NIR coatings

Bevel-----------------------A slight protective bevel

(For different applications, there are various choices in the specifications, which must be determined according to users’ specific requirements.)