U.S. Philips Corporation

Johannes M Verhoeven

Herman M Amendt

Albert Smid

Johan George Kloosterboer

Robert G Gossink

Renso J Zwiers

Henry A Schweitz

Martinus A Van Den Heuvel

Gerardus M Van De Hei

Peterus H Hanssen

Adrianus L Van Den Eeden

A display device comprising a cathode ray tube is provided with a holder which comprises a faceplate and which is arranged in front of the display window. The space between the faceplate and the display window is filled with a liquid or a gel. An improved image display, in particular an improved contrast and a flatter image are obtained.

Display device and cathode ray tube

A method of manufacturing components such as optical components (17, 18, 21, FIG. 2C) by means of a matrix which comprises a preform 12 of glass or quartz and has a skin 14 of a cured epoxy synthetic resin, the surface of which is the negative of a metal mold from which the matrix is produced. The matrix is suitable for use in the above-mentioned method, whereby optical components are produced which have surfaces that are for example, the aspherical negatives of the matrix surface.

Method of manufacturing optical components

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

For manufacturing monaspherical lenses, a correction layer of a synthetic resin is provided on a substrate having a spherical surface. In this method, centering is performed by using the curvature of the surface of the matrix. With a correct choice of the radius of curvature of the substrate surface, the substrate approaches the matrix most closely near a collection of inflection points in the matrix surface situated on a circle. A good centering without a guiding mechanism is possible by using the method according to the invention. Moreover, the differences in thickness in the correction layer are small enough to prevent shrinkage defects upon curing of the synthetic resin layer.

Optical element having an aspheric surface

Method of manufacturing an optical element having an aspheric surface

A beam-splitting prism provided with a roof-edge prism is described. The roof-edge prism is made of a cured transparent synthetic material and can be arranged on a surface of the beam-splitting prism in a simple and cheap manner.

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Eindhoven, Netherlands

Johannes M Verhoeven