Bought this to replace the stock lens in my K40 laser in addition to the Si mirrors and have been impressed by the results. I have never heard of the company Cloudray but I decided to take a risk since this lens was a bit cheaper than the alternatives (who similarly had names that I have not seen). If this lens is in fact a CVD ZnSe that is advertised, then the value (i paid 20) is quite good. I definitely have significant improvement in cutting/engraving performance over the stock lens and it has held up well so far.
I'll go ahead and say that this was a good purchase for my situation - the specs say it is good for up to a 200w laser and considering how big a difference I've seen in my performance it would be interesting to see how true that is.
If you're on the fence trying to find a safe lens then I would just go for it - I think most people will be happy with this lens.
I damaged my lens in my laser head. This lens was better than my old one at a lower price.
it is what it says it is
Lens is great
The lens worked better than the one that came with my laser. I would recommend this lens.
Feature Product
- High Quality ZnSe Crystal: USA CVD ZnSe Material. Excellent Optical Properties. Up to 500W CO2 Laser Resistance
- Superb Coating Process: Double-sided Solid Coating. Wiping Resistance. Long Working Life
- High Precision Process: Excellent Substrate. Precision Slicing, Polishing, Grinding Processes. High Temperature, Laser Resistance
- High Transmittance: High Quality Material and Exquisite Coating to reduce the loss of laser.Laser Transmittance Up To 99.5%. Higher Work Efficiency
- Usage: replacemeny DIY part for CO2 laser engraving, cutting & marking machine & CO2 laser head
Description
Feature:
CVD ZnSe Imported From USA, High Quality Material Make Sure the Steady of Laser System.
The CO2 Laser Transmittance of Lens can is more than 99.5% with Excellent Transparency.
Excellent High-Power Density Endurance.
Firm Surface Membrane. High Durabilityand Great Scratch Resistance.
Focusing Spot Size more Smaller.
Note: In general,a laser machine needs 1 pies of focusing lens and 3 reflective mirrors.
CO2 Laser Mirrors Purchase ASIN: B07B8YZLCP or B07BJHL3Y4
CO2 Laser Head Purchase ASIN: B07BGTWRY1
Specification:
Material:USA CVD ZnSe
Wavelength:10.6um
Transmittance:99.5%
Clear Aperture>90%
AR/AR coating R<0.5% per surface
Diameter tolerance:+0/-0.1mm
Thickness tolerance:+0/+0.2mm
FL Tolerance<±2%
Surface Figure<λ/2 per 1"Dia
Surface Quality 40-20scratch and dig
The difference between USA ZnSe and China PVD:
The China ZnSe can withstand less than 100W Laser power. While USA material can withstand higher power up to 200W.
And USA ZnSe has better focusing spot and better laser transmittance than China matierial.
Packing List:
Focus Lens USA x1pcs
Buen producto. Excelente.
Produces a very sharp clean point. Don't try to cut anything thicker than 2.5mm though beam gets wide very quickly.
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