Achromatic large-aperture fiber collimator LBFC40-PC-B

The LBTEK 40 mm EFL achromatic large-aperture fiber collimator is designed for large beam diameters. To minimize losses caused by surface reflections, all lenses in the collimator are coated with broadband anti-reflection coatings on both sides. The anti-reflection coating wavelength range is 400 - 650 nm. The red focusing ring on the collimator can be adjusted to change the focus distance between infinity and the closest focusing distance. For enhanced stability, the included 1.5 mm hex wrench can be used to tighten the set screw on the side of the housing to lock the focusing ring. During focusing, only the focusing ring rotates, while the remaining components remain unaffected.

• Large Clear Aperture: Ø20.5 mm
• Coating: 400-650 nm
• Effective Focal Length (EFL): 40 mm
• Maximum Couplable Input Fiber NA: 0.25
• Minimum Focusing Distance: 0.35 m
• SM1 External Thread, Compatible with Ø1-inch Lens Tubes