The APAC14 Achromatic Aspherical Lens is a 425 to 675 nm antireflection coated (front surface), 0.49 inch (12.5 mm) diameter, N-LaK8 and N-SF57 achromatic doublet lens with an effective focal length of 25.0 mm. The aspherized surface has a single layer of MgF2 coating. This achromat is computer optimized to provide optimal color correction and the smallest RMS spot size close to the diffraction limit. These lenses can be used within the wavelength regime of 400-2000nm. However, the color and spherical aberration correction is only optimized over the wavelength regime of 400-700nm. The Aspherical achromatic lenses not only have superior color correction comparing to standard achromats, but also has very similar spherical aberration corrections to those of machined aspheres. To reduce the wavefront errors arising from the standard achromats the second surface of these aspherical achromats are fused with a molded polymer surface. It is an ideal choice for Imaging, Microscopy, Fiber coupling, and Scanning and other applications that use a broadband laser or normal light sources.
| Model | APAC14 |
|---|---|
| Lens Shape | Plano-Convex |
| Lens Type | Achromatic Doublet |
| Effective Focal Length | 25.0 mm |
| Diameter | 0.49 in. (12.5 mm) |
| Antireflection Coating | AR.14 on Lak8 side and single layer MgF2 coating on the SF57 side |
| Surface Quality | 40-20 scratch-dig |
| Clear Aperture | 90% of central diameter |
| Te | 4.28 mm |
| Edge Thickness (Te) Tolerance | ±0.2 mm |
| Center Thickness (Tc) | 5.5 mm |
| Tc1 | 4.00 mm |
| Tc2 | 1.50 mm |
| Center Thickness (Tc) Tolerance | ± 0.2 mm |
| BFL | 21.69 mm |
| Design wavelength | 587.6 nm |
| R | 13.30 mm |
| R2 | -26.00 mm |
| R3 | Infinity |
