The invention relates to a method for producing a spectacle lens, wherein an edge structure is produced on the spectacle lens. The invention is characterized in that expected light effects produced or at least influenced by the edge structure of the spectacle lens, in particular light reflections and/or light transmissions, are ascertained for the spectacle lens with the edge structure, and the ascertained light effects are reduced, in particular in terms of intensity and/or direction and/or color, by applying one or more layers onto the edge structure of the spectacle lens.

A self-controlling feedback method for operating at least one coating installation for producing layer systems, a method for producing a layer system in at least one coating installation, a method for running in a coating process in at least one coating installation for producing a layer system, a coating system for producing a layer system, a coating installation for producing a layer system, a system of coating installations for producing layer systems, a database for storing installation datasets, a computer program product for a method for operating at least one coating installation, and a data processing system for executing a data processing program are disclosed.

Provided is a polycarbonate resin composition having excellent impact strength, molding residence stability, and dry heat resistance and that maintains high total light transmittance while suppressing light transmittance in a specific ultraviolet region, that is, harmful wavelengths near 420 nm. The polycarbonate resin composition of the present disclosure includes 0.1-1.5 mass part of an additive (B) per 100 mass parts of a polycarbonate resin (A) having a viscosity average molecular weight of 21,000-26,000 and includes 0.2 mass part or more of an ultraviolet absorber (B1) having a benzotriazole skeleton represented by formula 1 as the additive (B): In formula 1, R.sup.1-R.sup.5 each independently represent any of a hydrogen atom, a C1-20 hydrocarbon group, and a hydroxyl group, and the hydrocarbon group(s) may include an oxygen-containing group; R.sup.6-R.sup.9 each independently represent any of a hydrogen atom or a sulfur-containing group represented by R—S—, and at least one of R.sup.6-R.sup.9 is a sulfur-containing group represented by R—S—; and R is a C1-24 hydrocarbon group or a C6-24 aromatic group in which a hydrogen atom may be substituted by a C1-18 alkyl group.

An optical element has a substrate body made from transparent plastic and a coating having multiple layers. The coating includes a hard lacquer layer adjoining the substrate. The coating has a diffusivity ensuring the absorption of water molecules passing through the coating in the substrate and the release of water molecules from the substrate through the coating from an air atmosphere on that side of the coating facing away from the substrate with a flow density which, proceeding from the equilibrium state of the quantity of water molecules absorbed in the substrate in an air atmosphere at 23° C. and 50% relative humidity, brings the setting of the equilibrium state of the quantity of water molecules absorbed in the substrate in an air atmosphere at 40° C. and 95% relative humidity within an interval not more than 10 h longer than for setting this equilibrium under corresponding conditions with an identical uncoated substrate.

A blocked lens assembly suitable for on-block processing and cleaning includes a blocked lens and a sealing member disposed on at least a portion of an edge and/or surface defined by the blocked lens. The blocked lens further includes a lens blank having a front surface and a back surface, a lens blocking piece to hold the lens blank while processing the back surface of the lens blank, and an adhesive layer, disposed between the front surface of the lens blank and the lens blocking piece, to affix the lens blank to the lens blocking piece. The sealing member protects the blocked lens so as to facilitate cleaning of the blocked lens while the lens blocking piece is affixed to the front surface of the lens blank

A method includes: providing lens blank data relating to the first, second and peripheral blank surfaces of the lens blank; providing optical lens data relating to the first, second and peripheral optical surfaces of the optical lens; virtually positioning the optical lens in the lens blank in a position so that at least one of the first optical surface or the second optical surface is included within the lens blank; evaluating a manufacturing prism cost function, the machining prism cost function corresponding to a weighed sum of the first manufacturing prism to be used when blocking the lens blank on the second surface to machine the first optical surface and of the second manufacturing prism to be used when blocking the lens blank on the first optical surface to machine the second optical surface. The positioning and evaluation steps are repeated so as to minimize the manufacturing prism cost function.

A method for making a spectacle lens includes joining a mold and a sealing ring. The mold has an integrated block piece and a mold shell made by primary shaping and the sealing ring has a first end face, a second end face, a peripheral seal, an opening disposed on the first end face configured to receive a mold, and a flexible membrane on the second end face. A polymerizable material is introduced into the mold cavity with the aid of a pump action of the flexible membrane of the sealing ring. The flexible membrane of the sealing ring is fixed in a desired surface shape and the polymerization is carried out. The mold is removed with a cast-on spectacle lens blank.

A method for manufacturing a spectacle lens according to at least one data set of edging data and a computer program product with instructions for performing the method are disclosed. A spectacle lens blank, semifinished spectacle lens product, or a finished spectacle lens product is inspected for defects and compared to a data set to determine if it can be manufactured into an edged finished spectacle lens that fits into a specific spectacle frame such that the defect is not present in the edged finished spectacle lens.

Disclosed is a method implemented by computer for determining a lens blank intended to be used for the manufacturing of a finished optical article. The method includes: —a virtual volume data determining step, during which virtual volume data are determined based at least on finished optical article data representative of the volume of the finished optical article and over-thickness data representative of over-thickness requirements, the virtual volume data are determined so that the virtual volume defined by the virtual volume data includes the volume of the finished optical article volume of the finished optical article and the over-thickness, —a lens blank determining step, during which a lens blank is determined based on the virtual volume data so as to include the virtual volume defined by the virtual volume data.

A curved lens protector can include a tempered glass body having a self-supporting x-y axis curve with a concave inner surface and a convex outer surface opposite the inner surface. The tempered glass body can have an outer boundary of a predetermined shape to substantially match and fit with respect to an inner boundary of a lens holder portion of a predetermined lens frame. The tempered glass body can be configured for attachment to a predetermined curved lens without the use of an adhesive.