click me!
  • 20.0mm Diameter, 50.8mm Focal Length,AR Coated Meniscus ZnSe Focusing Lenses for CO2 Lasers
  • 20.0mm Diameter, 50.8mm Focal Length,AR Coated Meniscus ZnSe Focusing Lenses for CO2 Lasers

20.0mm Diameter, 50.8mm Focal Length,AR Coated Meniscus ZnSe Focusing Lenses for CO2 Lasers

Code: 2121-034


Qty 2-5
Qty 6
Volume pricing
Request a Quote


MaterialsCVD ZnSe CrystalsLens TypeMeniscus
Focal Length 50.8mm (+/-1%) Diameter 20.0mm (+0.0/-0.1mm)
Central Thickness 2.6mm (+/-1%) Aperture>90%
Frings (N)<3Irregularity (delta N)<1
Centration<3’Surface Quality40/20 S/D
CoatingAR/AR@10.6μm (T>99.5%@10.6μm)Fit for CO2 Laser80-150w

Focusing lens is a indispensable part of the CO2 laser systems for laser processing (cutting, punching, welding, graving, etc) and other kind of applications. There are conventionally two types of laser focusing lens, plano-convex and meniscus lenses, which are both available in Shalom EO. Generally meniscus lenses have the benefits of reduced spherical aberration and higher energy density over plano-convex lenses when working with greater beam sizes. Zinc Selenide (ZnSe) is a popular material to be manufactured into focusing lenses for CO2 lasers. ZnSe is advantageous due to having the lowest absorption comparing to other common CO2 laser transmitting materials, therefore particularly suitable for high-power applications. However being relatively soft, ZnSe might be more sensitive to scratches, for applications in dirty or high- splatter environments, Shalom offers GaAs focusing lenses for CO2 lasers, GaAs has a relatively high hardness and a greater thermal conductivity which helps to repel debris particles and transmit heat away from embedded particles.

Shalom EO chooses CVD (chemically vapor deposited) ZnSe which features  extremely low bulk losses due to absorption and scatter, high resistance to thermal shock and stablility in virtually all environments. Due to the relatively high refrative index of ZnSe,AR coating is critical to obtain high transmission. Shalom EO incorporates the the minimum-damage polishing technology during the coating process, and our  AR coating ensures high damaging threshold, high durability and wiping-resistance, with a excellent transmittance of T≥99.5%@10.6mm. 

Both stocked and customized plano-convex or meniscus ZnSe Focusing Lenses for CO2 laser cutting systems are available in Hangzhou Shalom EO, with a maximum diameter of 200mm implying high potentiality to higher power output. While selecting the right focusing lens for your laser systems, you need to take several important considerations:

  • How precise you need the graphics to be
  • How much is the output of your laser device (laser beam wattage).
  • Which materials are to be processed and processing purpose (cutting or engraving).
  • The thickness of the material (the penetration depth of the materials)

Our experienced tech support are capable and willing to provide consultancy to deliver you with the right lenses, which guarantee best operation efficiency for your laser systems, and economized costs. If you have any other specific requirements, we are also able to offer optimized design service of custom focusing lenses.

3 days