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Ten-high

TEN-HIGH CO2 Laser Lens 18mm Laser Mirror CO2 Laser Focal Lens Laser Focus Lens, ZnSe for CO2 Laser Engraving Cutting Machine, Dia18mm FL63.5mm

    • Based on 242 reviews
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Availability: Only 7 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Jan 1
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Size: D:18mm FL:63.5mm/2.5"


Features

  • Diameter: 18mm/0.71"; Focal Length: 63.5mm/2.5"; Thickness: 2mm/0.09"; Weight: 0.1KG
  • Shape: Meniscus; Transmittance: 99.5%
  • Material: PVD Znse; Compatible power: 30W-100W
  • High QualitySuperb double-sided solid coating. Precision slicing, polishing, grinding. Resistant to high temperature, excellent optical properties; long working life, high working efficiency.
  • Package includes: 1 x Lens

Description

Attention CO2 laser focal lens can be applied to CO2 laser engraving/cutting machines. Generally, a laser machine needs 1 piece of focal lens and 3 reflective mirrors.For engraving, it’s recommended to use the lens of focal length 38.1/50.8mm; for cutting, lenses of focal length 63.5/76.2/101.6mm are more commonly used.Suggestion: convex upward, the plane side faces to material. Product Details - D18mm Diameter 18mm/0.71 inch (‘+0.0/-0.1mm) Focal Length 25.4/38.1/50.8/63.5/76.2/101.6/127/190.5mm (‘±0.01mm) Thickness FL50.8/63.5mm:2mm; others:2.2mm ('+0.2mm/-0.1mm) Material China PVD Znse Compatible Power 30W-100W Transmittance ≥99.5% Wavelength 10.6um Shape FL50.8/63.5mm:Meniscus; Others:Plano-Convex Double-side AR Coating R＜0.5% per surface Clear Aperture ＞90% (polished) Surface Quility 40-20 scratch and dig Centration ＜3 arc minutes Package 1 pcs, 0.1KG Package Dimension 6cm x 6cm x 2cm How to determine focal length? Notes: Before installing the lens, please confirm the diameter and focal length.The focal length is the distance between the lens and the cutting/engraving material.Suggestion: convex upward, the plane side faces to material. China PVD ZnSe Focal Lens USA CVD ZnSe Focal Lens GaAs Focal Lens Mo Reflective Lens Si Reflective Lens Diameter 12/15/18/19.05/20/25/25.4mm 12/15/18/19.05/20/25/25.4/28/38.1mm 18/19.05/20/25/25.4/28mm 20/25/30mm 20/25/30mm Focal Length 25.4/38.1/50.8/63.5/76.2/101.6/127/190.5 mm 25.4/38.1/50.8/63.5/76.2/101.6/127/190.5 mm 50.8/63.5/76.2/101.6/127mm None None Material China PVD ZnSe USA PVD ZnSe GaAs Molybdenum Silicon Wavelength 10.6um 10.6um 10.6um 10.6μm 10.6μm Power 30W-400W 30W-400W 100W-600W 40W-100W 60W-400W Coating ✓ ✓ ✓ X ✓ How to clean CO2 laser lens? Step 1 - Cleaning for Light Contamination (dust, lint particles) Use an air bulb to blow off any loose contaminants from the optic surface before proceeding to the cleaning steps. Step 2 - Cleaning for Light Contamination (smudges, fingerprints) Lay the lens tissue on the optic's surface. Using an eyedropper, squeeze a few drops of acetone onto the lens tissue, wetting the complete optic's diameter. Without lifting the lens tissue, drag the lens tissue across the optic just fast enough so that the liquid evaporates behind the tissue. This should leave no streaks. Step 3 - Cleaning for Moderate Contamination (spittle, oils) Dampen an unused cotton swab or cotton ball with white distilled vinegar. Using light pressure, wipe the optic's surface with the damp cotton. Wipe excess distilled vinegar with a clean dry cotton swab. Immediately dampen a cotton swab or cotton ball with acetone. Gently wipe the optic's surface to remove any acetic acid. Read more


Product Dimensions: 1.97 x 0.79 x 1.97 inches


Item model number: ABCD


Is Discontinued By Manufacturer: No


Item Weight: 0.704 ounces


Manufacturer: TEN-HIGH


Date First Available: April 25, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jan 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • For the price it is a good focusing lens
Size: D:18mm FL:50.8mm/2"
Yah sure it is not an American made high end optic but then again most of us using Co2 laser cutters aren't running high end American made machines. Vast majority are of Asian origin machines. If I was using a high end machine I might swap to high end optics. For now these do the job on a 45 watt machine ( they say it is a 50 watt machine but not likely). I am a retired Laser engineering tech and prior field service engineer on CO2 and YAG laser so I am extremely versed in laers..optics etc. If I were to upgrade ( and I will) my stock chinese laser tube to a true 60 watt tube and modify the cavity to fit the tube ( which is easy)...then I will, at that time, order new optics all the way around as it would be a good time to suffer the pain of a full optics replacement and full alignment. Til then I will use these style optics as they work fine as long as you keep your system clean. I can tell you, as any true laser field service guy can, that dirty optics are by far the leading problems we faced...probably 60-70 percent of all calls were optics related and dirty or burnt optics led the way. You can clean these ZiSe optics with either a good alcohol ( not jim beam) or I will use eyegless wipes if they are mainly alcohol. Unless you are seriously harsh in cleaning them they will clean and run fine. I have had them so bad they lost 70 percent power to the work surface and was able to clean them back to close to spec power. granted they will need cleaning more often as once you get a slight burn scar on an optic is tends to burn or get "dirty" sooner but just keep an eye on power or how the laser is engraving. Most of us even myself do not have laser power meters...wish I did but too much money for me. I use a power puck now and then though...works just fine. Anyway back to the optic...sure it is not the best you can get but I find they work fine for most lasers under 100 watts. Above 80 or so watts I might wonder but for 40-60 watt machines no problem....even 80 watts I would be fine with. ... show more
Reviewed in the United States on July 26, 2019 by Shughey
    • Works but focus and transparency are problematic
Size: D:18mm FL:101.6mm/4"
I bought this replace the original lens which has a fl of 2 inch. I need to have larger working depth since we are engraving on a spherical surface. The one I bought is 4 inch FL. After testing, we found the focus spot is much larger than the original, which is somehow ok. But compared to the original lens, this lens only allow 1/2-2/3 of the power passed through, which significantly reduced the engrave depth and final look. We are an Amazon seller too - we understand the pain of selling on Amazon. We will not return it because it is what it is. It works but just not as good as expected. ... show more
Reviewed in the United States on February 2, 2021 by Klean
    • Excellent lens for the price and very accurate cut
Size: D:18mm FL:50.8mm/2"
I was very satisfied and surprized by the immediate improvement in my engraving and cutting. The meniscus type lens provides a finer focus point and what appears to be a longer “sweet spot” for cutting. I read the issues with the lens cracking but I believe it is just user error.
Reviewed in the United States on July 6, 2021 by abassham
    • Good lens for Chinese laser machine
Size: D:18mm FL:63.5mm/2.5"
I have a 60W Chinese laser machine and this lens is similar in style to the ones that come with them. Works great and cuts deeper than the 1.5inch that came with it. If you buy a lens for your laser machine, just keep in mind the higher you go in (inches) the taller the focal point ( Distance from your work piece to the laser head) my laser machine is designed with the round part of the lens facing down. Hope some of that info is useful for you buyers... ... show more
Reviewed in the United States on April 9, 2018 by Jeff Justin
    • best upgrade for the k40, 18mm 2"/50.8
Size: D:18mm FL:50.8mm/2"
Review Image by David M. David M.
this lens was the best upgrade for the k40 with lightobject air assist lens holder, burns way cleaner and beam is more focused than the small factory lens that come with k40, will definitely be buying more just as a backup set of lenses
Reviewed in the United States on June 14, 2019 by David M. David M.
    • Wish I changed my lens a long time ago
Size: D:18mm FL:50.8mm/2"
Replacing my old lens with this one almost doubled the speed that I could cut. That means doubling the money I make per hour. 1000% worth the investment
Reviewed in the United States on June 22, 2022 by Bishy
    • Replacement lens works great. Point of caution
Size: D:18mm FL:50.8mm/2"
Replacement lens works great. Point of caution. The lens will crack if you are over ambitions tightening it. A simple screwdriver in the pin hole works but requires lots of force. I 3d printed a tool with two finishing nails as the pins. The holes are not aligned on the center of the nut so 3d printing allowed a custom fit. New lens went in perfectly after that and it is performing well. ... show more
Reviewed in the United States on April 10, 2017 by Joseph Julicher
    • Replacement lens
Size: D:18mm FL:50.8mm/2"
Works good, upgraded my k40 stock lens
Reviewed in the United States on March 31, 2021 by M.Stenny

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