Research Article
Study on Design and Diamond Turning of Optical Freeform Surface for Progressive Addition Lenses
Table 2
Machining parameters for PAL.
| Processing steps | Sampling number | Feed rate (mm/r) | Tool nose radius (mm) |
| Roughing | 36 | 0.1 | 0.8 | Finishing | 180 | 0.01 | 0.8 |
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