Thorlabs C260TM‑C Mounted Geltech Aspheric Lens

This is a mounted aspheric lens from Thorlabs’ C-series, designed for collimating or focusing light in free-space optical setups or fiber-coupled systems.

📌 Key Specs

• Type: Mounted Geltech aspheric lens

• Effective Focal Length (EFL): ~15.29 mm

• Numerical Aperture (NA): 0.16

• AR Coating: Optimized for near-infrared wavelengths (typically around 1050 nm–1600 nm range depending on coating variant)

• Thread Mount: Standard small optical mount (commonly M9 × 0.5) that fits standard optomechanical holders

🧠 What It’s Used For

This type of lens is commonly used to:

• Collimate divergent beams from laser diodes and fiber outputs, especially in near-IR systems.

• Focus light for coupling into fibers or onto detectors.

• Serve as a simple objective lens in compact imaging or microscopy setups.