Collimating Lens
To convert divergent beams of light into a parallel beam, a collimating lens is needed. Avantes collimating lenses are optimized for the UV/VIS/NIR range (200-2500 nm) and have anodized aluminum housings.
The COL-UV/VIS and COL-90-UV/VIS have a 6 mm diameter lens with a confocal length of 8.7 mm. The COL-90-UV/VIS is used when a 90-degree exit angle is needed. The focal point for the COL-UV/VIS and COL-90-UV/VIS can be adjusted. The COL-UV/VIS can also be ordered with an FC/PC connector.
The COL-UV/VIS-25 is the big brother of the COL-UV/VIS. It has a lens diameter of 25 mm and a confocal length of 50 mm. This larger collimating lens is suitable for collection of light in free space.
| COL-UV/VIS | COL-90-UV/VIS | COL-UV/VIS-25 | |
| Lens Diameter | 6 mm | 25 mm | |
| Lens confocal length | 8.7 mm | 50 mm | |
| Lens Material | UV grade Fused Silica | ||
| Wavelength range | 200-2500nm | ||
| Fiber connection | SMA 905, UNS 1/4" (standard, FC/PC also possible) | ||
| Mirror reflectivity | n.a. | >90% (200-1100nm) | n.a. |
| Housing Material | Aluminum black anodized | ||
| Thread | UNF 3/8"-24 | n.a. | M6 (on the side for OPM mounting) |
| Temperature | -30ºC to 100ºC (-HT version 200ºC) | -30ºC to 100ºC | |
| COL-UV/VIS | Collimating lens for UV/VIS/NIR, incl. SMA adapter and adj. focus |
| COL-UV/VIS-FCPC | Collimating lens for UV/VIS/NIR, incl. FC/PC adapter, adj. focus |
| COL-90-UV/VIS | Collimating lens under 90 degrees for UV/VIS/NIR, incl. SMA adapter |
| COL-UV/VIS-25 | Collimating lens 25 mm for UV/VIS/NIR, incl. SMA adapter and adj. focus |
| DA-COL-SPEC | Direct Attached Collimator for Spectrometer. Usable for parallel incoming beams |