Multi-element Lenses

Acromatic doublets are cemented achromats consisting of two different lenses: Positive low dispersion crown glass and negative high dispersion flint glass.


An economical achromat for general use, suitable for an optical system that does not require high surface quality imaging, such as a microscope or telescope objective.


By combining two lenses with different wavelength dispersion and refractive index, the resulting component provides lower spherical aberration and chromatic aberration than a single spherical lens.
A cylindrical achromat is a single component made by joining two cylindrical surface lenses with different refractive indices.


These lenses contain elements that have different refractive indices and produce a high degree of correction over a bandwidth of 200 - 400 nm.