OPTICS CRYSTALS LASERS
   
 
Spherical Bi-Convex Lenses

MATERIAL - Ge (Germanium)


Crystaltechno LTD makes spherical bi-convex lenses from different types of optical crystals and glasses.

Germanium (Ge) spherical bi-convex lenses are widely used as focusing optics.

PARAMETER VALUE
 
  Surface form tolerances - Irregularity   Lambda/2 at 633 nm  
  Scratch-Dig   60 - 40  
  Diameter tolerance   +/- 0.1 mm  
  Paraxial Focal Length Tolerance   +/- 2%  
  Centration   less than 5 arc minutes  
  Clear aperture   90 % (80 %, if detail size less 20 mm)  
  Bevels   (0.2-0.5) mm x 45 degrees  


For thin Germanium Ge bi-convex lenses
Surface form tolerance - without requirements, if ratio of central thickness (tc) to Diameter (D) less 1/10.

D, mm FLx, mm R1=R2, mm tc, mm temin, mm Part Number
 
  12,7   25.0   149.14   2.3   2,0   BCX14-01  
  12,7   50.0   299.20   2.1   2,0   BCX14-02  
  25.4   25,0   148.84   3.1   2,0   BCX14-03  
  25.4   50,0   299.04   2.5   2,0   BCX14-04  
  25,4   75.0   449.14   2.4   2,0   BCX14-05  
  25,4   100   599.14   2.3   2,0   BCX14-06  
  25,4   150.0   899.20   2.2   2,0   BCX14-07  
  25,4   200.0   1199.18   2.1   2,0   BCX14-08  
  25,4   250.0   1499.18   2.1   2,0   BCX14-09  
  50.8   50.0   298.06   5.2   3,0   BCX14-10  
  50.8   100   598.44   4.1   3,0   BCX14-11  
  50.8   150.0   898.58   3.7   3,0   BCX14-12  
  50.8   200.0   1198.70   3.5   3,0   BCX14-13  
  50.8   250.0   1498.70   3.4   3,0   BCX14-14  
  50.8   500.0   2998.78   3.2   3,0   BCX14-15  

* Numerical parameters correspond to wavelength 10.6 microns (n=4)

Perhaps you will find the required Ge optics at our stock, please see item Optical Crystals.

 



 
 
 
CaF2
BaF2
MgF2
LiF
FS
BK7
Si
Ge
ZnSe


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