Cloudray Laser Si Reflective Lens Gold Plated Mirror 25mm for CO2 Laser Engraving & Cutting, 3PCS

Note: In general,a laser machine needs 1 pies of focusing lens and 3 reflective mirrors.

CO2 Laser Lens Purchase ASIN: B07B8HLZLH

CO2 Laser Head Purchase ASIN: B07BGTWRY1

Features and specifications:

Mateial: Gold-coated Si

Wavelength: 10.6 μm

Diameter Tolerance: +0/-0.13 mm

Thickness Tolerance: ±0.25 mm

FL Tolerance: < ±2%

Centration: < 3 arc minutes

Clear Aperture: > 90%

Surface Figure: < λ/2 per 1 inch diameter

Surface Quality: 40-20 scratch and dig

AR/AR coating: R < 0.5% per surface

The difference between Si mirror and Mo mirror:

Usually a complete beam path outside the laser tube requires three reflect mirror and a focus lens. Laser will loss when it travels, so the laser machine need a higher reflectivity mirror.

There are two kinds of reflect mirror used in co2 laser machine: molybdenum (Mo) mirror and silicon mirror.

Silicon mirror has a better reflective ability, which can reach 99.2%，there is less loss of energy, if the reflective is better, the machine can work better.

For molybdenum, the reflective can only reach over 97%. 

But Mo mirror is more durable, like one year, for silicon mirror, 9 month maybe. And Mo mirror can work under very bad situation, like in low temperature, highly oxidability environment. 

On the surface of silicon, it was coated with film, sometime the cutting material would rust the film

For laser machine with good quality, producer always choose silicon mirror.

Packing List:

Si mirror x3pcs