Achromatic lenses are cemented with two lenses mainly used to reduced values of spherical aberration, coma and chromatic aberration. Sunday offer positive achromatic lenses and negative achromatic lens with coatings
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Parameter
| Structure | Achromatic doublet lenses |
| Material | Optical glass, UVFS, Ge, Silicon, CaF2, MgF2, ZnSe ZnS, Sapphire. |
| Diameters Available | 0.5mm to 600mm |
| Diameter Tolerance | +0.00/-0.01mm or customer design |
| Surface Quality | 10-5 |
| Surface Irregularity | λ/10 PV @632.8nm or customer design |
| Thickness tolerance | +0/-0.01mm |
| Clear Aperture | >90% of Diameter |
| Chamfer | 0.05-0.5mmx45degree, according to customer's needs. |
| Centeration | <10 arcsec |
| Coating | Single Mag2, Multiple Layers AR Coating A:350-650nm B:650-1050nm C:1050-1585nm D: Customer Design |
Case Study
Axial and vertical color difference
Axial chromatic aberration arises from the difference in refractive index of the same material for different wavelengths of light, resulting in varying optical focal degrees.
While lateral chromatic aberration is caused by the different magnification ratios of the same material for different wavelengths of light. In essence, all of this is due to the different refractive indices of the same material for different wavelengths of light.
The function of the double-coated lens
1. The core method for eliminating aberrations
2. The key design for correcting color differences
3. An important way to optimize the optical system
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