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Minimize Chromatic Aberrations for Sharp, Clear Images

These meticulously crafted optical components function by leveraging the dispersion properties of distinct glass materials to achieve near-perfect collimation of specific wavelengths across the visible spectrum. 

LaCroix manufactures and assembles thousands of achromatic lenses every week, including triplets and aspheric achromats.

Expertise in Achromats

  • 4mm - 150mm
  • Surface accuracies up to λ/20
  • Centration to seconds
  • Broad range of materials including optical glass (Schott, Ohara, Hoya, CDGM), fused silica, fused quartz, filter glass, and float glass.
  • Optical engineering through manufacturing
  • Custom truncations
  • Off-axis spherical lenses

Achromat Applications

Surgical loupes Microscopy Multi-spectral imaging
Telescopes LASIK devices Machine vision
Ophthalmology Threat detection Laser target designators


What is an Achromat?

An achromat combines a convex lens and a concave lens, often made with different materials with different refractive properties, to focus light to the same spot, correcting for chromatic aberration and resulting in a sharper image.

achromatic doublet, achromatic triplet, achromats, achromatic lens
Standard Lens
chromatic aberration achromatic lens
Achromatic Doublet

Achromat Lens Manufacturing

You'll be assigned a LaCroix Manufacturing Engineer dedicated to seeing your project from sketch to completion.

We follow a step-by-step process with rigorous quality checks along the way. 

  1. Optical Design: Collaborate with our engineers to verify your print, or lean on our expertise to get your design just right. We'll recommend the right optical material and send it to production.
  2. Crown and Flint Manufacture: We'll use a lower dispersion material for the convex crown, and a higher dispersion material for the concave flint.  
  3. Optical Alignment and Assembly: After precision alignment in both the optical and mechanical axis, lenses are cemented together using a specialized index-specific optical cement. The optical cement is then cured using UV light.
  4. Centration: After assembly, some of the doublets are centered to the final diameter while others are pre-centered before cementing. Doublets can also be blackened after assembly to reduce scattering, which can be beneficial in some optical applications. 
  5. Test and Measurement: Interferometry, surface roughness, radius of curvature, aberrations, and more. 

In-House Custom Optical Coatings, UV to SWIR

We have extensive in-house coating capabilities to meet your requirements. See our coating capabilities.