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Home > Laser Crystals and Components > CO2 Laser Optics > ZnSe Focusing Lenses for CO2 Lasers (Stocks)

ZnSe Focusing Lenses for CO2 Lasers (Stocks)

  • Two types of lenses available: Plano-convex and Meniscus lenses
  • High-Quality CVD ZnSe grew in America, ensuring efficient power output and thermal resistance
  • AR coating with an excellent transmittance of T≥99.5%@10.6mm
  • Maximum diameter 200mm
  • Off-the-shelf and custom versions offered
Inquire for custom product  
Code Types Material Diameter CT Focal length Coating Unit Price Delivery Cart
2121-001 Plano Convex ZnSe 12.0mm 2.8mm 38.1mm AR@10.6μm $14.00 3 Days
2121-002 Meniscus ZnSe 12.0mm 2.6mm 50.8mm AR@10.6μm $14.00 3 Days
2121-003 Meniscus ZnSe 12.0mm 2.6mm 63.5mm AR@10.6μm $14.00 3 Days
2121-004 Plano Convex ZnSe 12.0mm 2.8mm 76.2mm AR@10.6μm $14.00 3 days
2121-005 Plano Convex ZnSe 12.0mm 2.8mm 95.25mm AR@10.6μm $14.00 3 days
2121-006 Plano Convex ZnSe 12.0mm 2.8mm 101.6mm AR@10.6μm $14.00 3 days
2121-007 Meniscus ZnSe 12.0mm 2.6mm 127mm AR@10.6μm $14.00 3 days
2121-008 Meniscus ZnSe 12.0mm 2.6mm 190.5mm AR@10.6μm $14.00 3 days
2121-009 Plano Convex ZnSe 15.0mm 2.8mm 38.1mm AR@10.6μm $19.50 3 days
2121-010 Meniscus ZnSe 15.0mm 2.6mm 50.8mm AR@10.6μm $19.50 3 days
2121-011 Meniscus ZnSe 15.0mm 2.6mm 63.5mm AR@10.6μm $19.50 3 days
2121-012 Plano Convex ZnSe 15.0mm 2.8mm 76.2mm AR@10.6μm $19.50 3 days
2121-013 Plano Convex ZnSe 15.0mm 2.8mm 95.25mm AR@10.6μm $19.50 3 days
2121-014 Plano Convex ZnSe 15.0mm 2.8mm 101.6mm AR@10.6μm $19.50 3 days
2121-015 Meniscus ZnSe 15.0mm 2.6mm 127mm AR@10.6μm $19.50 3 days
2121-016 Meniscus ZnSe 15.0mm 2.6mm 190.5mm AR@10.6μm $19.50 3 days
2121-017 Plano Convex ZnSe 18.0mm 2.8mm 38.1mm AR@10.6μm $22.00 3 days
2121-018 Meniscus ZnSe 18.0mm 2.6mm 50.8mm AR@10.6μm $22.00 3 days
2121-019 Meniscus ZnSe 18.0mm 2.6mm 63.5mm AR@10.6μm $22.00 3 days
2121-020 Plano Convex ZnSe 18.0mm 2.8mm 76.2mm AR@10.6μm $22.00 3 days
2121-021 Plano Convex ZnSe 18.0mm 2.8mm 95.25mm AR@10.6μm $22.00 3 days
2121-022 Plano Convex ZnSe 18.0mm 2.8mm 101.6mm AR@10.6μm $22.00 3 days
2121-023 Meniscus ZnSe 18.0mm 2.6mm 127mm AR@10.6μm $22.00 3 days
2121-024 Meniscus ZnSe 18.0mm 2.6mm 190.5mm AR@10.6μm $22.00 3 days
2121-025 Plano Convex ZnSe 19.0mm 2.8mm 38.1mm AR@10.6μm $22.00 3 days
2121-026 Meniscus ZnSe 19.0mm 2.6mm 50.8mm AR@10.6μm $22.00 3 days
2121-027 Meniscus ZnSe 19.0mm 2.6mm 63.5mm AR@10.6μm $22.00 3 days
2121-028 Plano Convex ZnSe 19.0mm 2.8mm 76.2mm AR@10.6μm $22.00 3 days
2121-029 Plano Convex ZnSe 19.0mm 2.8mm 95.25mm AR@10.6μm $22.00 3 days
2121-030 Plano Convex ZnSe 19.0mm 2.8mm 101.6mm AR@10.6μm $22.00 3 days
2121-031 Meniscus ZnSe 19.0mm 2.6mm 127mm AR@10.6μm $22.00 3 days
2121-032 Meniscus ZnSe 19.0mm 2.6mm 190.5mm AR@10.6μm $22.00 3 days
2121-033 Plano Convex ZnSe 20.0mm 2.8mm 38.1mm AR@10.6μm $22.00 3 days
2121-034 Meniscus ZnSe 20.0mm 2.6mm 50.8mm AR@10.6μm $22.00 3 days
2121-035 Meniscus ZnSe 20.0mm 2.6mm 63.5mm AR@10.6μm $22.00 3 days
2121-036 Plano Convex ZnSe 20.0mm 2.8mm 76.2mm AR@10.6μm $22.00 3 days
2121-037 Plano Convex ZnSe 20.0mm 2.8mm 95.25mm AR@10.6μm $22.00 3 days
2121-038 Plano Convex ZnSe 20.0mm 2.8mm 101.6mm AR@10.6μm $22.00 3 days
2121-039 Meniscus ZnSe 20.0mm 2.6mm 127mm AR@10.6μm $22.00 3 days
2121-040 Meniscus ZnSe 20.0mm 2.6mm 190.5mm AR@10.6μm $22.00 3 days
2121-041 Plano Convex ZnSe 22.0mm 2.8mm 38.1mm AR@10.6μm $26.00 3 days
2121-042 Meniscus ZnSe 22.0mm 2.6mm 50.8mm AR@10.6μm $26.00 3 days
2121-043 Meniscus ZnSe 22.0mm 2.6mm 63.5mm AR@10.6μm $26.00 3 days
2121-044 Plano Convex ZnSe 22.0mm 2.8mm 76.2mm AR@10.6μm $26.00 3 days
2121-045 Plano Convex ZnSe 22.0mm 2.8mm 95.25m AR@10.6μm $26.00 3 days
2121-046 Plano Convex ZnSe 22.0mm 2.8mm 101.6mm AR@10.6μm $26.00 3 days
2121-047 Meniscus ZnSe 22.0mm 2.6mm 127mm AR@10.6μm $26.00 3 days
2121-048 Meniscus ZnSe 22.0mm 2.6mm 190.5mm AR@10.6μm $26.00 3 days
2121-049 Plano Convex ZnSe 25.0mm 3.7mm 38.1mm AR@10.6μm $45.00 3 days
2121-050 Meniscus ZnSe 25.0mm 3.2mm 50.8mm AR@10.6μm $45.00 3 days
2121-051 Meniscus ZnSe 25.0mm 3.2mm 63.5mm AR@10.6μm $45.00 3 days
2121-052 Plano Convex ZnSe 25.0mm 3.7mm 76.2mm AR@10.6μm $45.00 3 days
2121-053 Plano Convex ZnSe 25.0mm 3.7mm 95.25mm AR@10.6μm $45.00 3 days
2121-054 Plano Convex ZnSe 25.0mm 3.7mm 101.6mm AR@10.6μm $45.00 3 days
2121-055 Meniscus ZnSe 25.0mm 3.2mm 127mm AR@10.6μm $45.00 3 days
2121-056 Meniscus ZnSe 25.0mm 3.2mm 190.5mm AR@10.6μm $45.00 3 days
2121-057 Plano Convex ZnSe 28.0mm 3.77mm 38.1mm AR@10.6μm $80.00 3 days
2121-058 Meniscus ZnSe 28.0mm 3.0mm 50.8mm AR@10.6μm $80.00 3 days
2121-059 Meniscus ZnSe 28.0mm 3.0mm 63.5mm AR@10.6μm $80.00 3 days
2121-060 Plano Convex ZnSe 28.0mm 3.77mm 76.2mm AR@10.6μm $80.00 3 days
2121-061 Plano Convex ZnSe 28.0mm 3.77mm 95.25mm AR@10.6μm $80.00 3 days
2121-062 Plano Convex ZnSe 28.0mm 3.77mm 101.6mm AR@10.6μm $80.00 3 days
2121-063 Meniscus ZnSe 28.0mm 3.0mm 127mm AR@10.6μm $80.00 3 days
2121-064 Meniscus ZnSe 28.0mm 3.0mm 190.5mm AR@10.6μm $80.00 3 days
2121-065 Plano Convex ZnSe 38.1mm 7.87mm 38.1mm AR@10.6μm $80.00 3 days
2121-066 Meniscus ZnSe 38.1mm 7.87mm 50.8mm AR@10.6μm $80.00 3 days
2121-067 Meniscus ZnSe 38.1mm 7.87mm 63.5mm AR@10.6μm $80.00 3 days
2121-068 Plano Convex ZnSe 38.1mm 7.87mm 76.2mm AR@10.6μm $80.00 3 days
2121-069 Plano Convex ZnSe 38.1mm 7.87mm 95.25mm AR@10.6μm $80.00 3 days
2121-070 Plano Convex ZnSe 38.1mm 7.87mm 101.6mm AR@10.6μm $80.00 3 days
2121-071 Meniscus ZnSe 38.1mm 7.87mm 127mm AR@10.6μm $190.00 3 days
2121-072 Meniscus ZnSe 38.1mm 7.87mm 190.5mm AR@10.6μm $190.00 3 days

The Focusing Lens is an indispensable part of CO2 laser systems for laser processing (cutting, punching, welding, graving, etc) and other kinds of applications. There are conventionally two types of laser focusing lenses, plano-convex and meniscus lenses, which are both available in Shalom EO. Generally, Plano-convex ZnSe Lenses are the more conventional option, but for applications involving greater beam sizes and power densities, Meniscus ZnSe Lenses are more ideal in terms of lower spherical aberrations. 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 compared 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.

Hangzhou Shalom EO offers Plano-convex and Meniscus Zinc Selenide (ZnSe) Focusing Lens for CO2 laser systems and versatile applications. For off-the-shelf versions, the specifications are: Diameters 12.0-38.1mm, Central Thicknesses 2.6-7.87mm, Focal Length 38.1-190.5mm with 10.6μm AR Coatings. For custom versions, the maximum diameter is 200mm, suggesting the potentiality to handling higher power levels.

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 stability in virtually all environments. Due to the relatively high refractive index of ZnSe， AR coating is critical to obtaining high transmission. Additionally, Shalom EO incorporates the minimum-damage polishing technology during the coating process, and our  AR coating ensures a high damaging threshold, high durability, and wiping resistance, with an excellent transmittance of T≥99.5%@10.6mm. Our experienced tech support is capable and willing to provide consultancy to deliver you the appropriate lens modules, which guarantee optimized interest for your laser systems, and economized costs. If you have any other specific requirements, we are also able to offer design services for custom focusing lenses.


Application Notes:

While selecting the right focusing lens for your laser systems, you need to take several important considerations:

  • How precisely do 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 what processing purpose (cutting or engraving).
  • The thickness of the material (the penetration depth of the materials)

Specifications:

MaterialsCVD ZnSe crystalsSize Tolerance+0.0/-0.1mm
Central Thickness Tolerance+/-0.1mmSurface Quality40/20 S/D
Frings (N)<3Irregularity(delta N)<1
Centration<3’Tolerance of Focal Length+/-1%
Aperture>90%Chamfer0.1-0.3mmx45degree
CoatingAR/AR@10.6μm (T>99.5%@10.6μm)

  

Basic Properties:

Transmission Range0.6 to 21.0μmRefractive Index2.4028 at 10.6μm
Reflection Loss29.1% at 10.6μm (2 surfaces)Absorption Coefficient0.0005 cm-1 at 10.6μm
Reststrahlen Peak45.7μmdn/dT+61 x 10-6 /°C at 10.6μm at 298K
dn/dμ = 05.5μmDensity5.27 g/cc
Melting Point1525°C (see notes below)Thermal Conductivity18 W m-1 K-1 at 298K
Thermal Expansion7.1 x 10-6 /°C at 273KHardnessKnoop 120 with 50g indenter
Specific Heat Capacity339 J Kg-1 K-1Dielectric Constantn/a
Youngs Modulus (E)67.2 GPaShear Modulus (G)n/a
Bulk Modulus (K)40 GPaElastic CoefficientsNot Available
Apparent Elastic Limit55.1 MPa (8000 psi)Apparent Elastic Limit55.1 MPa (8000 psi)
Poisson Ratio0.28Solubility0.001g/100g water
Molecular Weight144.33Class/StructureHIP polycrystalline cubic, ZnS, F43m

 

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