| Material | UVFS |
| Diameter tolerance | +0/-0.15 mm |
| Thickness tolerance | ±0.1 mm |
| Apex angle | 90° – 179.98° |
| Clear aperture | >90 % |
| Apex angle tolerance | ±0.5° |
| Surface quality | 40-20 S-D |
| Protective chamfers | <0,25 mm x 45° |
| Coatings | Call us |
Plano-concave axicons have a plano surface in combination with a concave conical surface. Concave axicon produces a ring shaped image along the axis from a point light source (e.g. Gaussian laser beam). Due to specifics in fabrication process, a hole in the center of concave surface is needed. Diameter of the hole is typically 1 mm. Different coatings can be applied on the polished surfaces of axicons. When coated with HR coating, concave conical surface can be used as a conical mirror in some specific applications.