Manufacturing method of plastic lens and the lens
US8025819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2004 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Jul 26, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a plastic lens which can simplify the installation, can enhance the forming accuracy and can exhibit extremely small optical irregularities. Molds having a planned combination are heated, using at least one pre-numerically controlled automatic chucking transport device and/or manually, the molds are constituted to be sequentially overlapped in accordance with the combination. First of all, an optical thermoplastic resin molten material having an extremely small agitation flow is placed on a forming surface of one lower mold. Subsequently, a forming surface of another upper mold is brought into contact with the resin molten material by inclining the posture of the upper mold, and both molds are made to approach each other to define a given distance therebetween so as to form a lens by pressing the resin molten material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.