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Feature

Sumitomo Electric Industries respond to customer demands as quickly as an all-round manufacturer of laser optics for CO2 laser processing machines.

Beam Combiners

The beam combiner is an optical component which superimposes two beams with different wavelengths concentrically. The CO2 laser beam is transmitted and the other beam is reflected. It is used as the alignment guide light of the CO2 laser beam, which is an invisible light, for coaxial visible laser (HeNe and diode laser) guide.

Beam Splitters

This is used to divide one laser beam into two or to take out a part of the beam.

Beam Expanders

This is used when you change the incident beam diameter to the lens and when controlling beam divergence during long distance delivery. There are both fixed magnification type and a variable magnification (zoom) type.

Windows

It is used for the output window of an unstable resonator, the window that confines the assist gas of a parabolic reflector head, etc. For materials, Zinc Selenide (ZnSe) is used commonly as with lenses.

Brewster Windows

The thickness reflection of the beam incident to an uncoated window in P-polarized light becomes zero at the angle called Brewster’s angle. The Brewster window uses this phenomenon and its shape is suitable for the Brewster’s angle.

●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.

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

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