| Precision Machined Optics Standard Tolerances |
| Feature |
Standard Quality
|
Precision Quality
|
Center Thickness
|
±0.02 mm
|
±0.01 mm |
| Diameter |
±0/-0.02 mm
|
+0/-0.01 mm
|
Surface Deviation
Power Irregularity
|
3 - 1 (Fringes)
|
Precision
1 - 1/4 (Fringes) |
| ETD |
0.05 mm
|
.01 mm
|
Scratch - Dig
|
60 - 40 |
20 - 10
|
| Sag |
±.015 mm
|
±0.10 mm
|
|