Description
Achromatic lens are combinations of two kinds of optical grade glasses, Mostly they are useful for reducing spherical aberration due to the differences of two glass’s dispersions and shapes of both lenses. They are often used for CCD images system, focusing and expanding of lasers system, and focusing/collimating light for fiber optics.
Achromatic Lens Specification:
Material:
low-index
Crown Glass& high-index Flint Glass etc optical glass
Dimension
Tolerance:
±0.1mm(Standard),
±0.01mm(High Precision)
Center
Thickness Tolerance:
±0.1mm(Standard),
±0.05mm(High Precision)
Paraxial
Focal Length:
±2%
Surface
quality:
60/40(Standard),
20/10(High Precision)
Clear
Aperture:
>85%
Surface
Figure:
λ/2(Standard),
λ/4(High Precision) @633nm
Centration:
3
arc minutes
Bevel:
<0.25mm×45°
Coating:
Upon
requirement
