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Spherical Bi-Convex Lenses
CaF2 BaF2 MgF2 LiF FS
BK-7 Si Ge ZnS ZnSe
   
  Material   Zinc Sulphide 
  Surface figure   Lambda/2 at 633 nm per inch
  Scratch-Dig   80 - 50
  Diameter   tolerance   ± 0.1 mm
  Paraxial
  Focal Length   Tolerance 		  ± 2%
  Centration   less than 5 arc minutes
  Clear aperture   > 80%
  Bevels   (0.2+0.3)mm x 45°
   
D, mm FLx, mm R, mm tc, mm temin, mm Part Number
12.7 12.7 29.53 3.4 2.0 BCX18-01
12.7 19.0 44.90 2.9 2.0 BCX18-02
12.7 25.0 59.26 2.7 2.0 BCX18-03
19.05 19.0 44.59 4.1 2.0 BCX18-04
19.05 25.0 59.02 3.5 2.0 BCX18-05
19.05 50.0 119.24 2.8 2.0 BCX18-06
19.05 75.0 179.32 2.5 2.0 BCX18-07
25.4 25.0 58.67 4.8 2.0 BCX18-08
25.4 50.0 119.08 3.4 2.0 BCX18-09
25.4 75.0 179.21 2.9 2.0 BCX18-10
25.4 100.0 239.28 2.7 2.0 BCX18-11
           

* Numerical parameters correspond to Lambda=10.6 µm (n=2.2)
 
     
 

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