Plano-Concave Lenses
 | Features
 | Diverges incident light |
| Various AR coatings are available for all these lenses. Please refer to the Coatings section |
| Other dimensions are available in small and mass production quantities |
|
Description
These simplest negative focus length lens has flat surface on one side and spherical surface on the other.
They are used to expand light beams or to increase focal lengths in optical systems or other applications.
Fibercryst provides PCV lens up to 250 mm diameter. Under customers request lens are anti-reflection coated (please refer to the Coatings section).
Standard Specifications
| Centration |
<3 arc minutes |
| Focal Length |
±3% |
| Focal Length |
±3% |
| Diameter Tolerance |
+0.0, -0.15mm |
| Design wavelength |
632.8 nm |
| Clear Aperture |
>90% |
| Surface Figure |
λ/4@632.8nm |
| Surface quality |
40-20 scratch & dig |
| AR coatings |
None. Please refer to the Coatings section. |
|
Properties (Diameter D, Focal length L)
| D, mm |
D, Inches |
L Minimal, mm |
L Maximal, mm |
| 12,7 |
0.5 |
-25 |
-10.000 |
| 25,4 |
1 |
-30 |
-10.000 |
| 38,1 |
1,5 |
-50 |
-10.000 |
| 50,8 |
2 |
-80 |
-10.000 |
| 76,2 |
3 |
-100 |
-10.000 |
|
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