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.
Item
Specifications
Material
N-BK7（H-K9L) + H-ZF2 or
others
Diameter tolerance
+0.0/-0.2mm
Thickness tolerance
±0.2mm
Wavelength
Specified by customer
Centration
<3min
Focus length tolerance
±2%
Surface quality
60/40
Clear aperture
85%
Bevel(face width×45°)
0.2~0.4mmor specified by
customer
Coating
Specified by
customer