Achromatic lens is one of the most common optical elements, which can diverge or converge light. It is most commonly used in various optical systems, and is generally coated with corresponding anti-reflection coating to increase transmittance. Of course, a single achromatic lens will have inherent dispersion problems. Usually, the dispersion effect is reduced by designing a pair of lenses of different materials to be glued together.
| Material | Glass, fused quartz, calcium fluoride, etc. |
| Plane surface type | λ/8- 3λ @633nm |
| Spherical surface type | N λ/2- 3λ/2 @633nm |
| Irregular spherical surface | λ/4-λ @633nm |
| Surface quality | 40-20, 60-40 20-10,10-5 |
| Thickness tolerance | ±0.1 mm ±0.02 mm |
| Outer diameter tolerance | +0.0 / -0.1 mm +0.0 / -0.02 mm |
| Eccentricity | ≤5 arcmin < 3 arcmin |
| Clear aperture | >90% 100% |
| Focal length tolerance | ±1% |
| Curvature range | 2mm-∞ |
| Coating | AR, AS, AF, Filter, Refector |
Material: Optical glass.
Diameter: 0.5 to 350 mm
Diameter Tolerance: +0/-0.02 mm
Thickness Tolerance: ±0.01 mm
Surface Quality: 10-5
Surface Figure: λ/10
Centration: 1 minute or 30 Second
Coating: Uncoated, AR and HR
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