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 Standard Lenses

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