Twist-On Collimators for VIS-NIR (425 nm - 1550 nm).
Twist-On Collimatorsconnect quickly to FC or SMA connectorized fiber cables to produce a collimated beam.
Twist-On Collimatorscontain 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 fine-threaded spring loaded focusing barrel.

 

	Output
Number	Focal Length	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 Collimatorsare 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	MSM	1 cm to 2 m