• Collimate Light
• Focal Length/NA: 2 mm/0.50
• AR-Coating: 600-1050 nm
• Diffraction-Limited Performance if Used with FC/PC Patch Cables
• Non-Magnetic Stainless Steel Housing

Thorlabs' CFC-2X-B Adjustable Focus FC Collimator, which consists of a spring-loaded, AR-coated aspheric lens mounted inside a stainless steel cell, is designed to collimate light exiting a fiber. This adjustable collimator has an FC/PC receptable. Rotation of the outer barrel of the collimator leads to translation of the housed aspheric lens along the optical axis, making it possible to adjust the distance between the lens and the tip of the fiber; the optic, which is held in place with two setscrews, can be translated by a distance equal to the "Fiber-to-Lens Distance" listed in the list below.

Please note that for this collimator, which accepts both FC/PC and FC/APC connectors, the light will not travel through the center of the apheric lens if an FC/APC connector is used. For wavefront-sensitive applications that suffer from off-axis performance characteristics of aspheres, consider using a FiberPort; with 6 degrees of freedom, the optic location can be adjusted to ensure the beam travels through the optical axis of the lens.

• Focal Length: 2 mm
• Input MFD: 4.3 µm
• Output Waist Diameter: 0.38 mmb
• Max Waist Distance: 89 mm
• Divergence: 0.123°
• Compatible Connectors: FC/PC, FC/APC
• Fiber-to-Lens Distance: 1.9 - 3.5 mm
• AR Coating: 600-1050 nm