Process for moulding a lens having an insert
US7022268B2 · kind B2 · utility
0Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2002 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Oct 13, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens has at least one insert (16, 28), which defines an optical path. For manufacturing the lens, the insert is first bonded to an overmould (36). A polymer (44) is then moulded in a mould (42, 36) formed on one of its faces from the overmould. After moulding, the overmould may be preserved and form part of the lens, if necessary after surface grinding. The overmould may also be separated from the lens; in this case, the lens is machined, removing at least part of the inserts. The lens obtained has an insert in a reproducible position, with an entrance or exit surface inducing no optical distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.