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Similar to the relationship between aspheric and spheric surfaces, with atoric and toric surfaces the arc that is rotated in creation of the torus can deviate from a circle with the introduction of a conic constant or aspheric coefficients, allowing the designer greater freedom in creating optical surfaces.
| Criterion | Standard | Custom |
|---|---|---|
| Diameter [mm] | 10-120 | 5-200 |
| Dia. Tolerance [mm] | ±0.1 | ±0.02 |
| Irregularity (RMS) [nm] | 100 | 50 |
| Scratch/Dig | 60-40 | 20-10 |
| CT. Tolerance [mm] | ±0.1 | ±0.03 |
| Surface Roughness Rq [nm] | <7.5nm | <7.5nm |
Standard [1-120] Custom [5-200]
Standard [±0.1] Custom [±0.02]
Standard [200] Custom [100]
Standard [60-40] Custom [20-10]
Standard [±0.2] Custom [±0.05]
Custom [<7.5nm]
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