Optical adhesive system having low refractive index
US5045397A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31612
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An optical cement system having an index of refraction of 1.50 or less, which can be used to bond pieces of optical quality glass during the preparation of devices. The surfaces of the glass pieces to be bonded are treated with an organosilane to produce activated sites, to which the adhesive forms a chemical bond. The adhesive is prepared by mixing together a transparent polymerizable monomer having a refractive index of 1.50 or less, a thickener, and an initiator. The adhesive is flowable, and its consistency is determined by the nature of the thickener. A layer of the adhesive is placed between the pieces of organosilane-treated glass, and polymerized by ultraviolet light or other energy, bonding the pieces of glass together with an adhesive having a refractive index less than that of the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.