Custom Negative Achromatic Doublet Lenses

Negative achromatic doublets are cemented compound lenses consisting of two elements: a crown (low-dispersion) element and a flint (high-dispersion) element. This design corrects chromatic aberration while providing negative optical power (diverging), making them essential for beam expansion, field correction, and aberration compensation in optical systems.

Our configurator provides instant online quoting for custom negative doublets with two material pair options: N-BK7/F2 for standard visible wavelength applications (400-700nm), and Fused Silica/CaF2 for extended UV/IR range (200-2000nm). You can specify diameter, all three radii of curvature (front surface, cemented interface, and back surface), individual edge thicknesses for both elements, and optional AR coatings.

The two elements are permanently bonded with optical cement, creating a monolithic component that eliminates alignment issues and provides superior performance compared to air-spaced designs. The configurator validates both the crown (DCC-like) and flint (meniscus) elements to ensure manufacturability.

If you need materials, coatings, or specifications not available in the configurator, please contact us at [email protected] for a custom quote. For triplet lenses, please email us a quote request.

Note: It costs about as much to make one custom doublet as it does to make ten, hence the minimum order quantity is 10 pieces. Large price drops occur as volume increases to 100 units.