 A lens with one plane surface and one convex surface.
Manufacturing Tolerances
| Attribute |
Commercial standard |
Precision Standard |
| Material |
BK7 |
BK7,Fused Silica |
| Diameter (Φ) (mm) |
+0/-0.5,+0/-0.25 |
+0/-0.20,-0.15 |
| Effective Focal Length (f) |
±5%,±3% |
±2%,±1% |
| Irregularity of Fringes |
0.5 |
0.2 |
| Surface Quality |
λ / 2, λ / 4 |
λ /4, λ / 10 |
| Cosmetics (Scratch-dig) |
80-50,60-40 |
20-10,10-5 |
| Center Thickness (t)(mm) |
±0.25,±0.20 |
±0.15, ±0.1 |
| Centering Error (arc min) |
3,2 |
2,1 |
| Clear Aperture |
80% of diameter |
90% of diameter |
| Bevel (mm) |
Fine ground, beveled |
Fine ground, beveled |
Coating |
See attached coating chapter |
See attached coating chapter |
 All dimensions are in mm unless otherwise specified.
Different material, sizes, tolerance and coating are available upon request.
|
|
|
