Achromatic Doublets
Achromatic
doublets are the simplest form of compound lens. They consist of two elements of
different refractive index, which are cemented together to provide a positive
focal length imaging lens. Achromats
are corrected for on-axis chromatic and spherical aberration making them good
for broadband collimation and focusing.
They
are supplied coated or with a single layer anti-reflection coating suitable for
the visible (400 - 600 nm) or the near infra-red
(600 – 1200 nm).
A wide range of focal lengths and diameters are available (see datasheet for common sizes and focal lengths). Please ask for sizes and focal lengths required as we can supply a wide selection of these lenses.