Light shielding blade material for optical apparatus
US6818287B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2904
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A light shielding blade material for use in an optical apparatus is constructed by a substrate composed of a plastic film having a pair of surfaces opposed to each other. A shield coating capable of blocking an incident light is formed on each surface of the substrate. A reinforcement member is disposed on each shield coating. The reinforcement member is composed of a thermosetting resin prepreg sheet reinforced with fibers arranged in an alignment direction, and hardened to laminate with the substrate through the shield coating. A lubricant coating having a black appearance and a lubricity sufficient to suppress a surface friction is formed on each reinforcement member such that an upper layer of the lubricant coating and a lower layer of the shield coating are separated from each other by an intermediate layer of the reinforcement member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.