Optical element producing device, optical element producing method, controlling program, and recording medium
US9427919B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Sep 27, 2012 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Jun 14, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2043/5833
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
When an optical element is produced by sandwiching a resin between a pair of molds, the resin is cured while a mold is kept in contact with the resin until the temperature of the resin reaches a gel point. Throughout the process, a load cell monitors pressure exerted to the mold. After detection of a state in which the pressure exerted to the mold is a negative pressure, the resin is cured while the position of the mold is controlled so that the pressure exerted to the mold is increased to a predetermined positive pressure and thereafter the positive pressure is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.