OPTICS CRYSTALS LASERS
   
 
Plane Parallel Windows

MATERIAL - BK7 (Borosilicate Crown Glass)


Crystaltechno LTD makes optical windows from different types of optical crystals and glasses.

BK7 (Borosilicate Crown Glass) plane parallel windows are widely used as transfer optics and shields.

PARAMETER VALUE
 
  Surface form tolerances - Flatness   Lambda/4 at 633 nm per inch  
  Surface form tolerances - Irregularity   Lambda/4 at 633 nm  
  Scratch-Dig   40 - 20  
  Size tolerance   +/- 0.1 mm  
  Parallelism   less than 3 arc minutes  
  Clear aperture   90 % (80%, if detail size less 20 mm)  
  Bevels   (0.2-0.5) mm x 45 degrees  


For thin BK7 windows
Surface form tolerance - without requirements, if ratio of Thickness (T) to Diameter (D) less 1/10

Diameter, mm Thickness, mm Part Number
 
  12,7   2   W9-05  
  25,4   3   W9-10  
  38,1   4   W10-15  
  50,8   6   W9-20  
  76,2   8   W9-30  
  101,6   12   W9-40  

Large sizes are also available per customer request.

Perhaps you will find the required BK7 windows and another BK7 optics at our stock, please see item Glass

 



 
 
 
CaF2
BaF2
MgF2
LiF
Al2O3
FS
Quartz
BK7
Si
Ge
ZnSe
ZnS



Ordering Info
 
  (c) Crystaltechno Ltd. Vernadskogo 113-106, Moscow 119571, Russia
+7 (495) 234-5951, 234-5952, 956-7610
fax +7 (495) 433-1551
sales@crystaltechno.com
Site suggestions: webmaster@crystaltechno.com