Twist-On Collimators for VIS-NIR (425 nm – 1550 nm)
Twist-On Collimators connect quickly to FC or SMA connectorized fiber cables to produce a collimated beam.
Twist-On Collimators contain a micro lens that is designed for diffraction-limited performance. Both surfaces of the lens are antireflection coated, with >98% transmission at the peak wavelength.
Focal compensation for different wavelengths is achieved by a simple hand adjustment of the ne-threaded spring loaded focusing barrel.
| Catalog Number | Focal Length | Output Beam Diameter | Clear Aperture | Numerical Aperture |
| FCC-2-λ | 2 mm | 0.5 mm | 1.5 mm | 0.30 |
| FCC-5-λ | 5 mm | 1.0 mm | 2.3 mm | 0.25 |
| FCC-8-λ | 8 mm | 1.6 mm | 3.3 mm | 0.22 |
λ: When ordering, specify wavelength for AR coatings
Twist-On Collimators are available with a choice of different focal length Lenses as follows:
| Connector | Focal Length | Fiber Type | Best Collimation Distance at |
| FC | 2 mm | SM | 2 cm to 50 cm |
| FC | 5 & 8 mm | SM | 5 cm to 1 m |
| SMA | 5 & 8 mm | MM | 1 cm to 2 m |