Optical adhesive system having low refractive index

Details Optical adhesive system having low refractive index Optical adhesive system having low refractive index

1987-02-13

1991-09-03

Gallagher, John J.

Stock material or miscellaneous articles

Composite

Of quartz or glass

156 99, 1562755, 1562757, 156314, 156332, 333239, 428420, 522 60, 522182, 385130, B32B 900, C09J 504

Patent

active

050453971

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.

REFERENCES:
patent: 2453666 (1948-11-01), Kropa
patent: 2921045 (1960-01-01), Di Martino
patent: 3359129 (1967-12-01), Mao
patent: 4374955 (1983-02-01), Gupta et al.
Kirk-Othmer, "Encyclopedia of Chemical Technology", Third Ed., vol. 15, (1981), p. 347.

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