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We can make lenses from 3 to 80mm diameter with almost any focal length. We have own growth facility for CaF2 crystal growth. That is why we offer Calcium Fluoride (CaF2) plano-concave lenses at very competitive price - up to 60% lower than major online optical catalogs!
Maximum size of CaF2 plano-concave is 76.2mm diameter. Alkor Technologies manufactures VUV grade CaF2 lenses for 193nm and 157nm upon request.
| Cat# |
Dia,in |
Dia,mm |
FOC,mm |
CT,mm |
R,mm |
ET,mm |
| Cf-pc-12.7-25 |
0.5 |
12.7 |
-25.4 |
1.5 |
10.209 |
3.7 |
| Cf-pc-12.7-50 |
0.5 |
12.7 |
-50.8 |
1.5 |
20.46 |
2.5 |
| Cf-pc-25.4-50 |
1.0 |
25.4 |
-50.8 |
2.0 |
20.46 |
6.4 |
| Cf-pc-25.4-63 |
1.0 |
25.4 |
-63.5 |
2.0 |
25.59 |
5.4 |
| Cf-pc-25.4-76 |
1.0 |
25.4 |
-76.2 |
2.0 |
30.698 |
4.8 |
| Cf-pc-25.4-100 |
1.0 |
25.4 |
-100 |
2.0 |
40.35 |
4.0 |
| Cf-pc-38.1-50 |
1.5 |
38.1 |
-50.8 |
2.5 |
20.46 |
15.5 |
| Cf-pc-38.1-63 |
1.5 |
38.1 |
-63.5 |
2.5 |
25.59 |
11.0 |
| Cf-pc-38.1-76 |
1.5 |
38.1 |
-76.2 |
2.5 |
30.698 |
9.1 |
| Cf-pc-38.1-100 |
1.5 |
38.1 |
-100 |
2.5 |
40.35 |
7.1 |
| Cf-pc-50.8-76 |
2.0 |
50.8 |
-76.2 |
3.0 |
30.698 |
13.0 |
| Cf-pc-50.8-100 |
2.0 |
50.8 |
-100 |
3.0 |
40.35 |
12.0 |
| Cf-pc-50.8-200 |
2.0 |
50.8 |
-200 |
3.0 |
80.54 |
7.1 |
| Cf-pc-50.8-500 |
2.0 |
50.8 |
-500 |
3.0 |
200.42 |
4.6 |
| Any other custom shape, size and focal length are available upon request. We do not have online purchasing at present so please contact us by email and order by stock code or if you do not see what you need, contact us and ask. You are assured of a friendly and direct response. |
Calcium Fluoride is used for lenses in transmision range 0.15-9µm. Degradation due to to moisture in the atmosphere is minimal and polished surfaces of the CaF2 lenses may be expected to withstand several years exposure to normal atmospheric conditions. Because of CaF2 low refractive index, Calcium Fluoride can be used without an anti-reflection coating.
FAQ: ordering information, delivery and payment terms.
| Standard Specifications |
| Material |
CaF2 optical grade (VUV, UV or IR grade) |
| Dimensions |
± 0.00/-0.10mm |
| Thickness |
± 0.2mm |
| Focal length tolerance |
±2% at 5 microns |
| Surface quality |
60/40 |
| Surface accuracy |
1 λ at 0.63µm |
| Edges |
Fine Ground |
| Clear Aperture |
90% of diameter |
| Centration |
≤ 3 Arc mins |
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