Lens

Lens

Lenses which minimize absorption of the laser beam, which has significant influence on processing quality, and realize high focusing performance and economy. We provide various lenses such as normal plano-convex lenses, meniscus lenses, aspherical lenses which realize high concentration, and pressure-resistant lenses used for laser processing machines.
The adoption of an aspherical surface shape minimizes spherical and realizes a small spot size. It is effective for optical systems with a large incident beam diameter and a short focus.

●Materials

Zinc selenide (ZnSe) is the material used most frequently because its transparency to infrared CO2 laser beams is high (absorption coefficient is small), and it transmits visible guide light. Sumitomo Electric has established a consistent production through growth of the optical crystal to polishing and coating.

●Coating

The anti-reflection coatings are used on the both side of lenses. We provide the low absorption series that has an important quality of absorption reduced by our coating technology. It is effective in high power laser processing.

No ThF4 (thorium fluoride : radioactive material) is used for CO2 laser optics of Sumitomo Electric. We provide environment-friendly products.

ZnSe pressure-resistant lens for laser processing

This is used for laser processing machines which cut iron sheets, etc. using high pressure assist gas with high power laser beam at high speed. There are two types of lens shapes; plano-convex type and meniscus type. Additionally the following types are also available; the standard type (S) which reduces absorption of laser beam and the low absorptance type (L) which solves thermal instability due to high power laser and improves and stabilizes the laser processing performance.

・ZnSe Pressure-Resistant Plano-Convex Lenses

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LXZ 38.1F95.3-2.03-S/L 1.5×3.75 38.1 95.3 2.03 3.4 93.8
LXZ 38.1F95.3-7.62-S/L 7.62 9.0 91.5
LXZ 38.1F95.3-7.87-S/L 7.87 9.2 91.4
LXZ 38.1F127-2.03-S/L 1.5×5.0 127.0 2.03 3.1 125.7
LXZ 38.1F127-4-S/L 4.00 5.0 124.9
LXZ 38.1F127-7.62-S/L 7.62 8.6 123.4
LXZ 38.1F127-7.87-S/L 7.87 8.9 123.3
LXZ 38.1F190.5-4-S/L 1.5×7.5 190.5 4.00 4.7 188.6
LXZ 38.1F190.5-7.62-S/L 7.62 8.3 187
LXZ 38.1F190.5-7.87-S/L 7.87 8.6 186.9
LXZ 50.8F127-7.87-S/L 2.0×5.0 50.8 127.0 7.87 9.7 123
LXZ 50.8F127-9.65-S/L 9.65 11.5 122.2
LXZ 50.8F190.5-3.05-S/L 2.0×7.5 190.5 3.05 4.3 188.7
LXZ 50.8F190.5-7.87-S/L 7.87 9.1 186.7
LXZ 50.8F190.5-9.65-S/L 9.65 10.9 186
LXZ 50.8F222.3-7.87-S/L 2.0×8.75 222.3 7.87 8.9 218.5
LXZ 50.8F222.3-9.65-S/L 9.65 10.7 223.3
LXZ 50.8F254-3.05-S/L 2.0×10.0 254.0 3.05 4.0 252.4
LXZ 50.8F254-7.87-S/L 7.87 8.8 250.3
LXZ 50.8F254-9.65-S/L 9.65 10.6 249.6
LXZ 63.5F222.3-7.87-S/L 2.5×8.75 63.5 222.3 7.87 9.5 218.3
LXZ 63.5F254-9.90-S/L 2.5×10.0 254.0 9.90 11.3 255.4

・ZnSe Pressure-Resistant Meniscus Lenses

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LMZ 38.1F63.5-6-S/L 1.5×2.5 38.1 63.5 6.00 8.0 56.9
LMZ 38.1F95.3-6-S/L 1.5×3.75 95.3 6.00 7.3 89.6
LMZ 38.1F95.3-7.37-S/L 7.37 8.7 88.7
LMZ 38.1F127-6-S/L 1.5×5.0 127.0 6.00 7.0 121.8
LMZ 38.1F127-8.99-S/L 8.99 10.0 120.0
LMZ 38.1F190.5-8.99-S/L 1.5×7.5 190.5 8.99 9.7 183.7
LMZ 38.1F254-7.37-S/L 1.5×10.0 254.0 7.37 7.9 248.5
LMZ 38.1F254-8.99-S/L 8.99 9.5 247.4

ZnSe Standard Lenses

・ZnSe Plano-Convex Lenses

This lens type is used most frequently for CO2 laser processing.

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LXZ 12.7F38.1-3 0.5×1.5 12.7 38.1 3 3.38 36.7
LXZ 12.7F50.8-3 0.5×2.0 50.8 3.28 49.4
LXZ 19.1F38.1-3 0.75×1.5 19.1 38.1 3 3.86 36.5
LXZ 19.1F50.8-3 0.75×2.0 50.8 3.64 49.3
LXZ 25.4F63.5-3 1.0×2.5 25.4 63.5 3 3.91 61.9
LXZ 25.4F95.3-3 1.0×3.75 95.3 3.6 93.7
LXZ 25.4F127-3 1.0×5.0 127 3.45 125.6
LXZ 25.4F190.5-3 1.0×7.5 190.5 3.3 189.1
LXZ 25.4F254-3 1.0×10.0 254 3.23 252.7
LXZ 27.9F63.5-3 1.1×2.5 27.9 63.5 3 4.1 61.8
LXZ 27.9F95.3-3 1.1×3.75 95.3 3.73 93.7
LXZ 27.9F127-3 1.1×5.0 127 3.55 125.5
LXZ 27.9F190.5-3 1.1×7.5 190.5 3.36 189.1
LXZ 27.9F254-3 1.1×10.0 254 3.27 252.6
LXZ 27.9F381-3 1.1×15.0 381 3.18 379.7
LXZ 38.1F95.3-3 1.5×3.75 38.1 95.3 3 4.36 93.4
LXZ 38.1F127-3 1.5×5.0 127 4.02 125.3
LXZ 38.1F190.5-3 1.5×7.5 190.5 3.68 189
LXZ 38.1F254-3 1.5×10.0 254 3.51 252.5
LXZ 38.1F381-3 1.5×15.0 381 3.34 379.6
LXZ 50.8F127-3 2.0×5.0 50.8 127 3 4.82 125
LXZ 50.8F190.5-3 2.0×7.5 190.5 4.21 188.7
LXZ 50.8F254-3 2.0×10.0 254 3.91 252.4
LXZ 50.8F381-3 2.0×15.0 381 3.6 379.5

・ZnSe Meniscus Lenses

It realizes good focusing characteristic reducing distortion by selecting two optimal spherical surfaces.

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LMZ 12.7F38.1-3 0.5×1.5 12.7 38.1 3 3.37 35.6
LMZ 19.1F38.1-3 0.75×1.5 19.1 38.1 3 3.84 35
LMZ 19.1F50.8-3 0.75×2.0 50.8 3.63 48
LMZ 25.4F25.4-2 1.0×1.0 25.4 25.4 2 4.41 21
LMZ 25.4F38.1-2 1.0×1.5 38.1 3.54 34.8
LMZ 25.4F50.8-2 1.0×2.0 50.8 3.14 48
LMZ 25.4F63.5-2 1.0×2.5 63.5 2.91 61
LMZ 25.4F95.3-2 1.0×3.75 95.3 2.6 93.2
LMZ 27.9F25.4-2 1.1×1.0 27.9 25.4 2 4.98 20.2
LMZ 27.9F38.1-2 1.1×1.5 38.1 3.87 34.4
LMZ 27.9F50.8-2 1.1×2.0 50.8 3.38 47.7
LMZ 27.9F63.5-2 1.1×2.5 63.5 3.1 60.8
LMZ 27.9F95.3-2 1.1×3.75 95.3 2.73 93
LMZ 27.9F127-2 1.1×5.0 127 2.54 125
LMZ 38.1F63.5-3 1.5×2.5 38.1 63.5 3 5.06 58.9
LMZ 38.1F95.3-3 1.5×3.75 95.3 4.36 91.6
LMZ 38.1F127-3 1.5×5.0 127 4.02 123.7
LMZ 38.1F190.5-3 1.5×7.5 190.5 3.68 187.7
LMZ 38.1F254-3 1.5×10.0 254 3.51 251.4
LMZ 50.8F127-4 2.0×5.0 50.8 127 4 5.81 122.1
LMZ 50.8F190.5-4 2.0×7.5 190.5 5.2 186.3

・ZnSe Aspheric Lenses

The adoption of an aspherical surface shape minimizes spherical and realizes a small spot size. It is effective for optical systems with a large incident beam diameter and a short focus.

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LASZ 27.9F25.4-3 1.1×1.0 27.9 25.4 3 5.78 19.1
LASZ 27.9F38.1-3 1.1×1.5 38.1 4.81 33.3
LASZ 27.9F50.8-3 1.1×2.0 50.8 4.35 46.7
LASZ 38.1F25.4-4 1.5×1.0 38.1 25.4 4 9.45 15.2
LASZ 38.1F38.1-4 1.5×1.5 38.1 7.43 30.2
LASZ 38.1F50.8-4 1.5×2.0 50.8 6.53 44.3
LASZ 38.1F63.5-4 1.5×2.5 63.5 6.02 57.8
LASZ 38.1F95.3-4 1.5×3.75 95.3 5.34 90.5
LASZ 50.8F63.5-5 2.0×2.5 50.8 63.5 5 8.62 54.7
LASZ 50.8F95.3-5 2.0×3.75 95.3 7.39 88.3
LASZ 50.8F127-5 2.0×5.0 127 6.79 120.9

・ZnSe Plano-Concave Lenses

This lens expands beams with the negative focal length. Like other lenses, Zinc selenide (ZnSe) is a common material.

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LCZ 12.7F25.4-3 0.5×1.0 12.7 25.4 3 2.43 26.4
LCZ 12.7F38.1-3 0.5×1.5 38.1 2.62 39.2
LCZ 12.7F50.8-3 0.5×2.0 50.8 2.72 51.9
LCZ 19.1F38.1-4 0.75×1.5 19.1 38.1 4 3.14 39.4
LCZ 19.1F50.8-4 0.75×2.0 50.8 3.36 52.2
LCZ 25.4F25.4-4 1.0×1.0 25.4 25.4 4 1.66 26.1
LCZ 25.4F38.1-4 1.0×1.5 38.1 2.47 39.1
LCZ 25.4F50.8-4 1.0×2.0 50.8 2.86 52
LCZ 25.4F63.5-4 1.0×2.5 63.5 3.09 64.8
LCZ 25.4F95.3-4 1.0×3.75 95.3 3.4 96.7
LCZ 25.4F127-4 1.0×5.0 127 3.55 128.5
LCZ 27.9F38.1-4 1.1×1.5 27.9 38.1 4 2.15 39
LCZ 27.9F63.5-4 1.1×2.5 63.5 2.9 64.7
LCZ 27.9F95.3-4 1.1×3.75 95.3 3.27 96.6
LCZ 27.9F127-4 1.1×5.0 127 3.45 128.4
LCZ 38.1F63.5-4 1.5×3.75 38.1 63.5 4 1.94 64.3
LCZ 38.1F95.3-4 1.5×3.75 95.3 2.64 96.3
LCZ 38.1F127-4 1.5×5.0 127 2.98 128.2

・ZnSe Cylinder Lenses

This lens forms a linear spot shape focusing only the single axis side of the laser beam. The plano-convex type of Zinc selenide (ZnSe) is used commonly.

Spec. No. φD × FL(inch) Dimension(mm)
φD FL ET CT WD
LCLZ 12.7F38.1-3 0.5×1.5 12.7 38.1 3 3.38 36.7
LCLZ 12.7F50.8-3 0.5×2.0 50.8 3.28 49.4
LCLZ 25.4F25.4-3 1.0×1.0 25.4 25.4 3 5.34 23.2
LCLZ 25.4F38.1-3 1.0×1.5 38.1 4.53 36.2
LCLZ 25.4F50.8-3 1.0×2.0 50.8 4.14 49.1
LCLZ 25.4F63.5-3 1.0×2.5 63.5 3.91 61.9
LCLZ 25.4F95.3-3 1.0×3.75 95.3 3.6 93.7
LCLZ 25.4F127-3 1.0×5.0 127 3.45 125.6
LCLZ 27.9F63.5-3 1.1×2.5 27.9 63.5 3 4.1 61.8
LCLZ 27.9F95.3-3 1.1×3.75 95.3 3.73 93.7
LCLZ 38.1F63.5-3 1.5×2.5 38.1 63.5 3 5.06 61.4
LCLZ 38.1F95.3-3 1.5×3.75 95.3 4.36 93.4
LCLZ 38.1F127-3 1.5×5.0 127 4.02 125.3
LCLZ 50.8F127-3 2.0×5.0 50.8 127 3 4.82 125

・ZnSe Collimating Lenses

This is used to suppress the expansion of the beam when a laser beam is transmitted. Plano-convex lenses with a focal length of more than several meters are used commonly.

Spec. No. φD(inch) Dimension(mm)
φD FL ET CT WD
LXZ 25.4F500-3 1 25.4 500 3 3.11 498.7
LXZ 25.4F1000-3 1000 3.06 998.7
LXZ 25.4F1500-3 1500 3.04 1498.7
LXZ 25.4F2000-3 2000 3.03 1998.7
LXZ 38.1F500-4 1.5 38.1 500 4 4.26 498.2
LXZ 38.1F1000-4 1000 4.13 998.3
LXZ 38.1F1500-4 1500 4.09 1498.3
LXZ 38.1F2000-4 2000 4.06 1998.3
LXZ 38.1F3000-4 3000 4.04 2998.3
LXZ 38.1F5000-4 5000 4.03 4998.3
LXZ 38.1F7500-4 7500 4.02 7498.3
LXZ 38.1F10000-4 10000 4.01 9998.3
LXZ 38.1F12000-4 12000 4.01 11998.3
LXZ 38.1F15000-4 15000 4.01 14998.3
LXZ 50.8F1000-4 2 50.8 1000 4 4.23 998.2
LXZ 50.8F2000-4 2000 4.11 1998.3
LXZ 50.8F5000-4 5000 4.05 4998.3
LXZ 50.8F10000-4 10000 4.02 9998.3
LXZ 50.8F15000-4 15000 4.02 14998.3
LXZ 50.8F20000-4 20000 4.01 19998.3

※ Please contact us with specific requests if you require other specifications.