OPTICS CRYSTALS LASERS
   
 
ZnSe Spherical Biconvex Lenses

MATERIAL - CVD ZnSe (Zinc Selenide)


Crystaltechno Ltd. manufactures spherical biconvex lenses from Zinc Selenide (CVD ZnSe) material as well as from, glass, fused silica and different optical crystals Zinc Selenide spherical biconvex lenses are widely used as focusing transfer optics.

Our company manufactures Zinc Selenide (ZnSe CVD) biconvex lenses for infrared applications including high power CO2 laser systems. CVD ZnSe biconvex lenses diameter (12.7 - 50.8) mm is available.

Two-sided AR coating of ZnSe biconvex lenses is available.

Perhaps you will find the required Zinc Selenide lenses and other ZnSe optics at our stock, please see item Optical Crystals.

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 zinc selenide ZnSe biconvex lenses
Surface form tolerance - without requirements, if ratio of central thickness (tc) to Diameter (D) less 1/10

ZnSe Lens
Diameter
D, mm
Focal
Length
FL, mm
Radius of
Curvature
R1=R2, mm
ZnSe Lens
Center
Thicknesstc, mm
ZnSe Lens
Edge
Thicknesste, mm
Part Number
 
  12,7   12,7   34,61   3,2   2,0   BCX17-01  
  12,7   19,0   52,52   2,8   2,0   BCX17-02  
  12,7   25,0   69,24   2,6   2,0   BCX17-03  
  19,05   19,0   52,23   3,8   2,0   BCX17-04  
  19,05   25,0   69,02   3,3   2,0   BCX17-05  
  19,05   50,0   139,23   2,7   2,0   BCX17-06  
  19,05   75,0   209.29   2.4   2,0   BCX17-07  
  25,4   25,0   68.70   4.4   2,0   BCX17-08  
  25,4   50,0   139.07   3,2   2,0   BCX17-09  
  25,4   75,0   209.19   2.8   2,0   BCX17-10  
  25,4   100,0   279.26   2.6   2,0   BCX17-11  
  38,1   50.0   138.34   5.6   3,0   BCX17-12  
  38,1   75.0   208.61   4.7   3,0   BCX17-13  
  38,1   100,0   278.74   4.3   3,0   BCX17-14  
  38,1   150,0   418.88   3.9   3,0   BCX17-15  
  50,8   50,0   137.72   7.7   3,0   BCX17-16  
  50,8   100,0   278.44   5.3   3,0   BCX17-17  
  50,8   150,0   418.68   4.5   3,0   BCX17-18  
  50,8   200,0   558.79   4.2   3,0   BCX17-19  
  50,8   250,0   698.85   3.9   3,0   BCX17-20  

* Numerical parameters correspond to wavelength 10.6 microns (n=2.4)

We produce ZnSe biconvex lenses from CVD grown Zinc Selenide laser grade material.

Basic characteristics of CVD Zinc Selenide laser grade material: transparency in spectral range (0.5 - 20) microns, grain size (50 -70 ) microns; index of absorption 0.0005 (1/cm) at 10.6 microns;

You can see spectral transmittance of ZnSe window (thickness 10 mm).

As ZnSe material has high refractive index (n = 2.4 at 10.6microns), Fresnel losses of Zinc Selenide polished surface are equal 17 % (at one side, at 10.6 microns), thus the transmission of ZnSe lens equals 68.9%. Crystaltechno Ltd. offers two sides antireflection AR coating both for spectral range (3 - 12) microns and for one wavelength (10.6 microns or another). Transmission of AR/AR coated ZnSe lenses - up to 99%. Please contact us for ZnSe lenses pricing.

Perhaps you will find required CVD Zinc Selenide lenses and other CVD ZnSe 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