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Windows

Flat Windows

Precision windows

Ideal for interferometer flats, laser windows, beamsplitter substrates, or parallel plates.      

Material: BK7 and Fused silica typically. Other Glass, Sapphire, Quartz, Germanium(Ge), Silicon(Si) are also available.     

General Specifications 

    

Dimension(mm):

Dia12.7

12.7x12.7

Dia25.4

25.4x25.4

Dia50.8

50.8x50.8

upon request

Thickness:

Per request

Dimension Tolerance:

+/- 0.1mm

Surface Quality:

20-10 scratch and dig

Surface Flatness:

λ/4 up to λ/10 @ 633 nm 

Transmitted Wavefront Error:

λ/4 up to λ/10 per inch

Parallelism:

< 3 arc min up to 5 arc sec

AR Coating Range:

350-700nm

650-1050nm

1050-1700

Per Request

Reflectance over AR Coating Range:

Ravg < 0.5% or R<0.2%@single wavelength    

Clear Aperture:

>90%

Substrate:

N-BK7/H-K9L




Commercial Quality Windows

Non-precision windows commonly used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows, etc.     

 

 

Specifications:       

Diameter Tolerance: +0.0, -0.1mm    
Thickness Tolerance: ± 0.2mm    
Clear Aperture: >85%    
Parallelism: 1'    
Surface Quality: 60-40 scratch and dig     
Flatness: λ/4 @632.8nm     
Protective Bevel     
AR coating is available by request.    
R<0.2%@single wavelength     

Ravg<0.5%@broadband wavelength range    




Laser Windows

With perfect surface polishing, the window have extremly smooth surface to fit fot the high power application.    

It also can be used as substrate for laser mirror, laser coupler, etc.    

Material: BK7 or Fused silica     

 

Specifications:      
Diameter Tolerance: +0.0, -0.1mm     
Thickness Tolerance: ± 0.2mm     
Clear Aperture: >85%     
Surface Quality: Better than 10-5     
Flatness: Better than λ/10 @632.8nm       
Parallelism: up to 5"    
Protective Bevel     
High damage threshold AR coating is availabe.     

e.g. Damage threshold >2GW/cm^2 (pulse laser) or >5KW/cm^2 (CW laser) for AR coating at 1064nm.    


 Customer designed special windows are available!

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