Lens, Mirror for CO2 Laser

Other

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.

Spec Examples

Beam Combiners

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Spec. No. Dimensions (mm) Combined Beam
øD T Wavelength Angle of Incident Polarization
MFZ 19.1-2-532R 19.1 2 532nm 45° Random
MFZ 19.1-2-635R 635nm
MFZ 25.4-3-635R 25.4 3
MFZ 25.4-3-633R 633nm
MFZ 30-3-633R 30 3
MFZ 30-3-532R 532nm
MFZ 38.1-4-633R 38.1 4 633nm
MFZ 50.8-5-633R 50.8 5

Beam Splitters

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Spec. No. Dimensions (mm) Reflectivity Polarization Angle of Incident
øD T
BSZ 25.4-3-50 25.4 3 50% R 45deg
BSZ 25.4-3-50P P
BSZ 25.4-3-50S S
BSZ 38.1-3-50 38.1 3 R
BSZ 38.1-3-50P P
BSZ 38.1-3-50S S
BSZ 50.8-5.08-50 50.8 5.08 R
BSZ 50.8-5.08-50P P
BSZ 50.8-5.08-50S S

Beam Expanders
Fixed Magnification (High Performance Type)

Scroll horizontally

Spec. No. Magnification Clear Input Aperture
(ø mm)		 Clear Output Aperture
(ø mm)		 External × Length
(ø mm)(mm)
BXHZ X2-25-45 2 25 45 70×100
BXHZ X3-25-45 3 70×110
BXHZ X4-25-45 4 70×130

Beam Expanders
Fixed Magnification (Compact Type)

Scroll horizontally

Spec. No. Magnification Clear Input Aperture
(ø mm)		 Clear Output Aperture
(ø mm)		 External × Length
(ø mm)(mm)
BXCZ X2-11-21 2 11 21 42×64
BXCZ X2.5-11-21 2.5 42×96
BXCZ X3-11-21 3 42×86
BXCZ X3.5-11-21 3.5 42×92
BXCZ X4-11-34 4 34 50×106
BXCZ X5-11-47 5 47 60×120

Beam Expanders
Variable Magnification (Zoom)

Scroll horizontally

Spec. No. Magnification Clear Input Aperture
(ø mm)		 Clear Output Aperture
(ø mm)		 External × Length
(ø mm)(mm)
ZXZ X2-5-24-35 2.0 ～ 5.0 24 35 70×170

Windows

Scroll horizontally

Spec. No. Dimensions (mm)
øD T
WZ 25.4-3 25.4 3
WZ 38.1-3 38.1
WZ 38.1-4 4
WZ 50-4 50
WZ 50.8-5.08 50.8 5.08
WZ 55-6 55 6
WZ 60-6 60
WZ 63.5-6.35 63.5 6.35
WZ 70-6 70 6
WZ 76.2-6.35 76.2 6.35

Brewster Windows

Scroll horizontally

Spec. No. Dimensions (mm)
Length Width Thickness
BWZ 40X16-2 40 16 2
BWZ 53X20-2 53 20 2
BWZ 66X25.4-3.1 66 25.4 3.1
BWZ 101.6X38.1-4 101.6 38.1 4

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