Edmund Optics 43-346 Protected Gold, Spherical Mirror

The Edmund Optics 43‑346 is a 1″ diameter, 4″ focal length spherical mirror with a protected gold coating—an excellent option for multispectral imaging and light collection in the 700–10,000 nm range. Here’s a breakdown:

🧱 Key Specifications (via Edmund Optics data)

• Diameter: 25.4 mm ±0.3 mm

• Focal Length: 4.00″ (101.6 mm), ±2% tolerance

• Radius of Curvature: 203.2 mm

• Aperture: f/4

• Surface Quality & Accuracy: 60‑40 scratch/dig and λ/4

• Coating: Protected gold metal, 700–10,000 nm

• Reflectivity: >96% average over 700–2000 nm, and 2000–10,000 nm

• Damage Threshold: 0.8 J/cm² at 1064 nm, 10 ns pulses

✅ Advantages

• High IR reflectivity — Protected gold excels in the 700–10,000 nm spectral range.

• Chromatic aberration-free focusing — Spherical design focuses across full range.

• Precision optics — λ/4 surface accuracy ensures sharp focusing.

• Robust durability — Substrate and coating designed for resilience.

🧩 Ideal Applications

• IR imaging or spectroscopy

• Laser beam collection/focusing in IR

• Multispectral optical setups requiring high reflectance in IR