Method for numerical control milling, forming and polishing of large-diameter aspheric lens
US12019424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2020 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Jan 4, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45157
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for numerical control milling, forming and polishing of a large-diameter aspheric lens to solve the problems of long time-consuming and severe tool wear in the machining of a meter-scale large-diameter aspheric surface is disclosed. An aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined through generating cutting by using an annular grinding wheel tool; the rings are equally spaced, there are a total of N rings, and the width of any ring is jointly determined by the Nth ring, the (N−1)th ring, positioning accuracy, and a generatrix equation of the aspheric lens, and the nth ring has a curvature radius of Rn=sqrt(R02−k*(n*dx)2); and the aspheric surface is enveloped by a large number of rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.