A method is provided to fasten a pin in a target position extending at least partially into a cavity with a distance (D) between a bottom surface of the cavity and a facing end of the pin. The pin is positioned at the target position, and the distance (D) is determined between the bottom surface of the cavity and the facing end of the pin in the target position. The pin is removed from the cavity, and a rigid spacer is applied on the bottom surface. A thickness of the rigid spacer equals the distance (D) between the bottom surface and the facing end of the pin in the target position. The adhesive is filled into the cavity onto the rigid spacer, and the pin is repositioned at the target position. The adhesive is then cured to obtain a joint between the pin and the second component.

A method is provided for joining a pin member of a first component to a second component with a cavity, using an adhesive, to fasten the pin in a target position extending at least partially into the cavity. A distance (D) is provided between the bottom surface of the cavity and the facing end of the pin. A flexible spacer is positioned on the bottom surface of the cavity. The thickness of the spacer equals or exceeds the distance (D) between the bottom surface of the cavity and the facing end of the pin in the target position. The adhesive is filled into the cavity onto the flexible spacer, and the pin is positioned in the target position. The adhesive is cured to obtain a joint between the pin and the second component.

Provided is a dielectric material (1, 2, 3, 4) to solve the problems of low production efficiency and high production cost of the existing dielectric material. The dielectric material (1, 2, 3, 4) is a tube structure. The tube wall of the tube structure is formed from a foam material foamed. The dielectric material further includes metal wires (11, 21, 31, 41). The metal wires (11, 21, 31, 41) are disposed in the longitudinal direction of the tube structure, and are evenly distributed in the tube wall of the tube structure without being in contact with each other. The dielectric material (1, 2, 3, 4) with such a structure has the advantages of simple structure, accurate control of the dielectric constant, light weight per unit volume, easy and efficient production, and stable technical indicators. Further provided is a dielectric material production method.

A method for producing a spectacle lens 2 including a base portion 2 that is made of a resin material and includes a convex object-side face and a concave eyeball-side face, and an optical element 12 that is made of a material different from the material for forming the base portion and is embedded in the base portion, is described. The method includes: arranging an optical element in a cavity 28 of a mold including a first mold part 20 and a second mold part 24 that can be opened and closed; introducing a resin material for forming a base portion of the spectacle lens into the cavity of the mold; obtaining the spectacle lens by curing the resin material that is a resin for forming the base portion; disassembling the mold; and detaching the spectacle lens from the mold.

Provided is a method for preparing a polymeric article including introducing a polymerizable composition into a mold; sealing the composition within the mold using a sealing means; placing the mold into a convection cure oven; subjecting the polymerizable composition to a cure cycle sufficient to partially cure the composition; extracting the mold from the convection cure oven; optionally, removing the sealing means from the mold; placing the mold into an auxiliary curing chamber which is placed into the convection cure oven, or placing the mold into an auxiliary curing chamber which is within the convection cure oven; subjecting the polymerizable composition to a further cure cycle to complete polymerization of the composition, thereby forming a cured polymeric article; and removing the cured polymeric article from the mold.

Provided herein are methods of molding thermoplastic polymers into optical elements. The optical elements in the form of cylindrical discs, semi-finished lens blanks or finished lenses are compression molded at high temperature typically above thermoplastic polymers softening temperature and under high pressure. The semi-finished lens blanks and finished lenses are molded using front and back glass molds inside a mold assembly which reshapes the cylindrical discs that are either previously molded or cut out from thick slab. Also provided are methods for producing single vision and progressive addition lens prescriptions.

An optical device comprising a lens barrel part housing one or more lens elements and comprising a first coupling formation. A support part is provided comprising a second coupling formation mechanically mated with the first for supporting the lens barrel part in front of an optical sensor. The first and second coupling formations are mated at a connection plane. At least a rear portion of the lens barrel part extends rearward from the connection plane such that at least one lens element is located between the connection plane and the optical sensor. Forward movement of the connection plane caused by thermal expansion of the support part is compensated by rearward thermal expansion of the rear portion for maintaining the image plane substantially coincident with the sensitivity plane.

A method of manufacturing an optical member by curing a thermally polymerizable composition by heating includes, in the following order: a first step of filling an inside of a mold with the thermally polymerizable composition in which the mold is configured by disposing a frame-shaped member, with a Young's modulus of 1.0 GPa or more at a polymerization initiation temperature of the thermally polymerizable composition, between two mold members facing each other; and a second step of heating the mold to the polymerization initiation temperature or more.

An optical lens assembly has a central axis and includes at least one dual molded lens element. The dual molded lens element includes a light transmitting portion and a light absorbing portion, wherein the light transmitting portion includes an optical effective region and a lens peripheral region, and the lens peripheral region surrounds the optical effective region. The light absorbing portion surrounds the optical effective region. The light transmitting portion and the light absorbing portion are made of different plastic materials with different colors, and are integrally formed by an injection molding. The light transmitting portion or the light absorbing portion includes a plurality of annular convex structures, and the annular convex structures surround the central axis.

Provided is a resin sheet including a plurality of aspheric sections having low variation of thickness precision and high shape precision. A method of producing a resin sheet includes hot press forming a thermoplastic resin film formed using a thermoplastic resin so as to produce a resin sheet including a plurality of aspheric sections that are separated from one another. The hot press forming is performed by increasing the pressing pressure to a final pressing pressure with an average pressure increase rate of 0.1 MPa/s or less at a pressing temperature that is at least 40° C. higher than the glass-transition temperature of the thermoplastic resin.