The focal length of a plano-concave spherical reflector is half the radius of curvature of the sphere. The focal length of a plano-concave spherical reflector is half the radius of curvature of the sphere. We provide spherical reflectors with no coating or with reflective coating. The reflective coating options include ordinary protective aluminum coating, protective UV reflective aluminum coating, protective silver coating, protective gold coating or dielectric high-reflective coating.
| Material | fine annealed H-K9L optical glass |
| Surface shape | λ/4@633nm |
| Centering error | <3 arc minutes |
| Reflection surface finish | 40/20-60/40 |
| Back | fine grinding or inspection polishing |
| Dimension error | '+0.0/-0.1mm |
| Thickness tolerance | ±0.2mm |
| Focal length tolerance | ±2% |
| Chamfer | protective chamfer 0.2mmx45° |
| Coating | according to customer requirements |
sales@leithopt.com.sg 
Tel: +86-13756880126 
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