| Material | BK7, UVFS |
| Diameter tolerance | +0/-0.1 mm |
| Center thickness | 3 mm |
| Thickness tolerance | ±0.1 mm |
| Focal length tolerance | ±3 % |
| Clear aperture | >90 % |
| Surface quality | 40-20 S-D |
| Surface figure | <λ/4 @ 632.8 nm |
| Protective chamfers | <0,25 mm x 45° |
| Laser damage threshold | Protected Aluminum: >0.25 J/cm² for 10 ns pulses @1064 |
Cylindrical concave metallic coated mirrors are used for focusing light to a thin line without chromatic aberration. Being metallic coated, mirrors work as reflectors in broadband spectral range. Most common application for cylindrical mirrors is either beam expansion or line generation. Altechna offers gold, silver and aluminum as standard coatings, but other type mirrors coatings such as chrome, copper, dielectric high reflection or partial reflection are available on request.