Specifications:
| Type | Achromatic Doublet Lenses | Material | Customized |
| Clear Aperture | >90% | Focal Length Tolerance | ±2% |
| Coating | R<0.5%@400-700nm or Custom | Diameter Tolerance | +0.0/-0.1mm |
| Thickness Tolerance | ±0.2mm | Centering | 3 arcmin |
| Irregularity | λ/4@632.8nm | Surface Quality | 40/20 S/D |
| Chamfer | 0.2mm x 45 degree |
Using paired two different glasses and correcting chromatic aberration caused by the variation of focal length with wavelength, achromatic doublet lenses have the better performance to minimize spherical aberration than single lenses, and are able to use in the whole visible light region. This kind of lenses is probably the most economical way of achieving quality white light illumination and imaging.
Hangzhou Shalom EO provide the custom achromatic doublet lenses according to customer’s request.
