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DeLn Optics Co.,Ltd. (China)

China Manufacturer with main products: Lenses, Windows, Prisms, Filters, Mirrors, Waveplates, Crystals, Ktp

Home  >Products Catalog > Optical Windows-Laser Window,Infrared Window,Brewster Window

Optical Windows-Laser Window,Infrared Window,Brewster Window


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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Specifications

Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate. DeLn Optics’ Optical Windows are offered in a variety of substrates, such as Ge, Si, N-BK7, UV Fused Silica, ZnSe, Multiple anti-reflection coating options are available for the UV, visible, or IR.
 
Standard AR Coating
Name
Wavelength Range 
Reflection Specifications
MgF2
¼ Wave  550nm
Ravg ≤ 1.75% 400 - 700nm (N-BK7)
VIS 0°
425 - 675nm
Ravg ≤ 0.4% 425 - 675nm
VIS 45°
425 - 675nm
Ravg ≤ 0.75% 425 - 675nm
UV-AR
250 - 450nm
Ravg ≤ 0.75% 250 - 425nm
Ravg ≤ 0.5% 370 - 420nm
UV-VIS
250 - 700nm
Ravg ≤ 1.5% 250 - 700nm
VIS-NIR
400 - 1000nm
Ravg ≤ 1.25% 400 - 870nm
Ravg ≤ 1.25% 890 - 1000nm
NIR 1
600 - 1050nm
Ravg ≤ 0.5% 600 - 1050nm
NIR 2
750 - 1550nm
Rave ≤ 0.7% 750 - 1550nm
NIR3
1200 - 1600nm
Ravg ≤ 0.25% 1200 - 1600nm
NIR4
900 - 1700nm
Ravg ≤ 1.0% 900 - 1700nm
NIR5
3 - 5um
Ravg ≤ 2% 3-5um
NIR6
8 - 12um
Ravg ≤ 2% 8-12um
NIR7
3 - 12um
Ravg ≤ 5% 3-12um
"V"
Design wavelength
 R ≤ 0.25% DWL
 
Laser Windows are ideally suited for applications which require protecting laser output. Laser Windows feature a high efficiency, high damage threshold V-coating to maximize transmission at the design wavelength.
Material
UV grade fused silica
Dimension Tolerance
+0.0/-0.1mm
Thickness Tolerance
±0.1mm
Clear Aperture
>90%
Parallelism
5 arc seconds
Surface Quality
20/10
Wavefront Distortion
High Precision: λ/10 at 633nm per 25mm
Chamfer
Protected <0.25mmx45deg
AR Coating
R ≤ 0.25% per surface at DWL
Wavelengths
266nm, 355nm, 405nm, 532nm, 633nm, 755nm, 785nm, 980nm, 1064nm, 1550nm
 
 
DeLn Optics offers a wide variety of infrared windows. the available material includes CaF2, MgF2, Si, Ge, and ZnSe etc. We can offer different AR coatings covering 3-12µm.
 
Material
CaF2, MgF2, Si, Ge, and ZnSe
Dimension Tolerance
+0.0/-0.1mm
Thickness Tolerance
±0.1mm
Clear Aperture
> 90%
Parallelism
< 1 arc min
Surface Quality
60/40
Wavefront Distortion
< λ at 633nm per 25mm
Chamfer
< 0.25mmx45deg
AR Coating
Ravg ≤ 2% 3-5um or Ravg ≤ 2% 8-12um or Ravg ≤ 5% 3-12um or None,
Other coatings is available upon request
 
Brewster Windows are uncoated substrates of laser grade surface quality and parallelism that are designed to be used at Brewster’s Angle (the angle at which p-polarized light incident on the surface is not reflected). At this angle, p polarization reflectance drops to zero. When used in a laser cavity, a Brewster Window reduces the cavity loss for p-polarized light compared to s-polarized light. The result of preferentially reducing the loss along one polarization axis is that the laser will emit linearly polarized light.
Material
N-BK7 Grade A optical glass, UV grade fused silica
Dimension Tolerance
+0.0/-0.1mm
Thickness Tolerance
±0.1mm
Clear Aperture
> 90%
Parallelism
< 10 arc seconds
Surface Quality
20/10
Wavefront Distortion
λ/10 at 633nm per 25mm
Brewster Angle:
55° 32'
Chamfer
< 0.25mmx45deg

 

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