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Spherical Plano-Convex Lenses
MATERIAL - ZnSe (Zinc Selenide) CVD
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Crystaltechno Ltd. manufactures spherical plano-convex lenses from fused silica, glass and different types of optical crystals, including ZnSe (Zinc Selenide) CVD.
ZnSe (Zinc Selenide) spherical plano-convex lenses are widely used as focusing transfer optics.
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PARAMETER |
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VALUE |
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Surface figure |
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Lambda/2 at 633 nm per inch |
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Scratch-Dig |
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60 - 40 |
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Diameter tolerance |
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± 0.1 mm |
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Paraxial Focal Length Tolerance |
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± 2% |
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Centration |
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less than 5 arc minutes |
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Clear aperture |
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90 % |
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Bevels |
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(0.2-0.3) mm x 45 arc degrees |
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D, mm |
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FLx, mm |
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R, mm |
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tc, mm |
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te, mm |
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Part Number |
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Unit price, EUR
laser grade |
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Unit price, EUR
IR optical grade |
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12,7 |
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12,7 |
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17,78 |
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3,2 |
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2,0 |
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PCX17-02 |
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44 |
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44 |
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12,7 |
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19,0 |
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26,67 |
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2,8 |
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2,0 |
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PCX17-02 |
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44 |
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44 |
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12,7 |
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25,0 |
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35,0 |
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2,6 |
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2,0 |
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PCX17-03 |
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44 |
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44 |
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19,05 |
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19,0 |
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26,67 |
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3,8 |
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2,0 |
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PCX17-04 |
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47 |
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47 |
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19,05 |
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25,0 |
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35,0 |
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3,3 |
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2,0 |
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PCX17-05 |
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46 |
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46 |
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19,05 |
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50,0 |
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70,0 |
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2,7 |
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2,0 |
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PCX17-06 |
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46 |
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46 |
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19,05 |
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75,0 |
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105,0 |
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2,4 |
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2,0 |
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PCX17-07 |
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45 |
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45 |
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25,4 |
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25,0 |
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35,0 |
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4,4 |
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2,0 |
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PCX17-08 |
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43 |
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43 |
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25,4 |
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50,0 |
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70,0 |
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3,2 |
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2,0 |
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PCX17-09 |
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50 |
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50 |
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25,4 |
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75,0 |
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105,0 |
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2,8 |
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2,0 |
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PCX17-10 |
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50 |
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50 |
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25,4 |
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100,0 |
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140,0 |
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2,6 |
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2,0 |
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PCX17-11 |
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49 |
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49 |
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38,1 |
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50,0 |
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70,0 |
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5,6 |
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3,0 |
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PCX17-12 |
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115 |
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77 |
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38,1 |
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75,0 |
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105,0 |
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4,7 |
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3,0 |
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PCX17-13 |
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105 |
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73 |
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38,1 |
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100,0 |
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140,0 |
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4,3 |
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3,0 |
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PCX17-14 |
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101 |
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72 |
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38,1 |
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150,0 |
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210,0 |
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3,9 |
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3,0 |
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PCX17-15 |
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97 |
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70 |
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50,8 |
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50,0 |
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70,0 |
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7,8 |
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3,0 |
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PCX17-16 |
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215 |
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125 |
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50,8 |
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100,0 |
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140,0 |
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5,3 |
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3,0 |
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PCX17-17 |
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169 |
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106 |
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50,8 |
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150,0 |
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210,0 |
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4,5 |
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3,0 |
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PCX17-18 |
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154 |
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100 |
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50,8 |
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200,0 |
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280,0 |
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4,2 |
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3,0 |
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PCX17-19 |
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149 |
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97 |
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50,8 |
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250,0 |
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350,0 |
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3,9 |
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3,0 |
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PCX17-20 |
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143 |
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95 |
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* Numerical parameters correspond to Lambda=10.6 microns (n=2.4).
We produce two kinds of Zinc Selenide (ZnSe) CVD material, which differ in spectral transmittance and grain size, namely
- Zinc Selenide (ZnSe) CVD laser grade, grain size (50-70) microns, index of absorption 0.0005 cm-1 at 10.6 microns, optical component dimensions (3 - 100) mm, thickness 20mm, used in high power CO2 laser optics, in medical applications.
- Zinc Selenide (ZnSe) CVD IR optical grade, grain size (20-100) microns, index of absorption 0.003 cm-1 at 10.6 microns, optical component dimensions (3 - 300) mm, thickness 20mm, used in protective windows and thermal imaging equipment, in industrial applications.
You can see both spectral transmittance of laser grade and IR optical grade uncoated polished windows (thickness 2 mm).
Because of high refractive index (n=2.4 at 10.6 microns), Fresnel losses of ZnSe polished surface are equal 17% (at one side), thus the transmission of Zinc Selenide polished window equals 68.9% at 10.6 micron. We offer two sides antireflection (AR/AR) coating both for one wavelength (10.6 microns or another) and for the spectral range (3 - 12) microns. Transmission of AR/AR coated Zinc Selenide (ZnSe) window - up to 99%.
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