An achromatic lens, also referred to as an achromat, typically consists of two
optical components cemented together, usually a positive low-index
(crown) element and a negative high-index (flint) element. Due to
the difference in refractive indices, chromatic aberration with
respect to two selected wavelengths has been corrected. The lenses
have been corrected for on-axis spherical aberration as well.
Achromatic doublets are used as telescope objectives, eye loupes,
magnifying glasses and eyepieces. Achromatic doublets have also
been used to focus and manipulate laser beams because their image
quality is superior to single lenses.
At CLZ Precision Optics , we specialize in manufacturing high quality Spherical lenses for a variety of applications, including Plano Convex Lenses, Plano Concave Lenses, Bi-convex Lenses, Bi-Concave Lenses, Meniscus Lenses, Spherical
Mirrors and Achromatic Doublets.
Here is Catalog of CLZ Achromatic Lens: