Cloudray CO2 Laser Gold Si Reflective Mirrors 25mm (3-Pack) — 99.2% IR Reflectivity, 3mm Thick

These three plane-shaped silicon (Si) mirrors measure 25 mm in diameter and 3 mm thick, with a gold reflective coating optimised for the 10,600 nm CO2 laser band. Built for hobbyist machines like the K40 and for industrial CO2 systems up to several hundred watts, this set focuses on delivering stable beam steering, high reflectivity, and durable thermal behavior. Each mirror is finished with precision slicing, polishing and coating to reduce scatter and maximize lifespan under continuous use.

How do these mirrors affect beam performance in a CO2 laser system?

Replacing worn or lower-quality mirrors with these Cloudray gold Si mirrors reduces power loss along the optical path and preserves beam quality. The high IR reflectivity keeps more energy reaching the focusing lens and workpiece, which translates to more consistent cutting and engraving results.

• Nominal diameter: 25 mm (0.98 in) and thickness: 3 mm (0.12 in).
• Reflectivity over 99.2% at 10,600 nm to minimize transmission losses.
• Plane surface geometry for stable alignment and predictable beam steering.

Are these mirrors compatible with my machine and laser power?

Yes—the mirrors are intended to work across a broad range of CO2 laser systems, from hobbyist K40 setups to larger engraving and cutting machines. Their coating and substrate handle typical operating temperatures for systems rated roughly 60W to 400W, but alignment and cooling practices still matter for high-power installations.

• Works with K40 upgrades, desktop engravers, and many 60W–400W industrial CO2 lasers.
• Gold coating offers good thermal resistance for continuous operation.
• Check mirror mount size and beam diameter for fit before installation.

What maintenance or handling steps help these mirrors last longer?

Proper handling and occasional cleaning extend mirror lifetime and keep reflectivity high. Always handle by the edges, avoid touching coated faces, and clean with appropriate lens tissue and solvent when needed; avoid abrasive materials or excessive pressure.

• Handle edges only; use lint-free gloves or tweezers to avoid fingerprints.
• Clean with optical-grade solvent and soft lens tissue if contaminants appear.
• Ensure mirror mounts are secure and aligned to prevent vibration damage.

Who is this for: These Cloudray 25 mm gold-plated Si mirrors are aimed at DIYers upgrading K40-style machines, small-shop laser operators needing reliable replacements, and production users seeking consistent optical components for medium-power CO2 systems. They are suitable when you need a compact, high-reflectivity mirror set to restore or improve beam efficiency, provided your mounts accommodate 25 mm optics and your system follows standard cooling and alignment practices.