U.S. Philips Corporation

U.a. Philips Corporation

Robert G Gossink

Giok D Khoe

Cornelis M Jochem

Dirk Jan Broer

Rifat A Hikmet

Johan George Kloosterboer

Johannes M Verhoeven

Henricus Matheus Van Ass

Gerardus M Van De Hei

By using an adhesive layer (9) between a mount (3) and an optical component (5), which adhesive layer comprises liquid crystalline monomers, the polymerization shrinkage can be minimized in the desired directions X and Y if the monomers are oriented in the Z-direction by an external field before they are polymerized.

Bonding using a difunctional liquid crystalline monomer adhesive under

A replica lens having a glass lens body 1 and a cured layer 2 of a synthetic resin composition provided thereon in which the refractive indices n.sub.1, n.sub.2 of the glass lens body and the synthetic resin composition, respectively, as well as the shrinkage factor k of the synthetic resin composition upon curing thereof satisfy the relationship n.sub.1 =n.sub.2 (1-k)+k.

Replica lens having a glass lens body

Laminated optical component, for example an aspherical lens, comprising a supporting member which is manufactured from a transparent inorganic material and on at least one side has a layer of lacquer of a specific composition cured by means of radiation, for example UV radiation.

Laminated optical component

A coupling element for coupling a laser radiation source to a monomode optical transmission fiber. The end of the fiber is monotonically flattened at a temperature at which the fiber core has a viscosity of between 10.sup.7 to 10.sup.8.5 poises. The fiber has a cladding glass chosen to have a viscosity of between 10.sup.10 -10.sup.11 poises at the flattening temperature. This causes the core glass to emerge in the form of a semi-ellipsoidal lens, when the fiber is flattened.

Coupling element for an optical transmission fiber

Method of producing a coupling element for coupling a laser radiation source to a monomode optical transmission fiber. The end of the fiber is monotonically flattened at a temperature at which the fiber's core has a viscosity of between 10.sup.7 to 10.sup.8.5 poises. The fiber has a cladding glass chosen to have a viscosity of between 10.sup.10 -10.sup.11 poises at the flattening temperature. This causes the core glass to emerge in the form of a semi-ellipsoidal lens, when the fiber is flattened.

Method of producing a coupling element for an optical transmission fiber

Glass composition pairs which are suitable for processing into fibers with a gradient refractive index profile for use in telecommunication. They consist of GeO.sub.2 B.sub.2 O.sub.3 /SiO.sub.2, alkali oxide which in one composition consists of Li.sub.2 O and/or Na.sub.2 O and in the other composition of Na.sub.2 O and/or K.sub.2 O and other compatible oxides.

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Eindhoven, Netherlands

Robert G Gossink