The present invention is a method for producing a spectacle lens from a lens material, and includes: a marking step (step S10) of marking an identification mark for identifying the spectacle lens, and a processing information mark which is used to process a lens blank and includes a tray identification 2D code, a tray identification code, a shape line and a position mark by forming a hole or a groove in a convex surface of the lens material by laser; and a concave surface machining processing step (step S13) of reading the processing information mark, and machining a concave surface of the lens blank based on the read processing information mark.

The invention relates to a method for storage of information and to an information storage medium with increased storage density by multi-bit coding.

A container may include a tubular sidewall defining interior and exterior surfaces of the container, and including first and second regions disposed relative to one another along a major axis of the tubular sidewall. The container further may include an identification mark embedded within the tubular sidewall at a plurality of sectors about the tubular sidewall within the first region. Each sector may have a width, and the identification mark is machine readable by a reader viewing any arbitrary one or more of the sectors. An exemplary method for preparing such a container is also provided.

A method of manufacturing a metal product comprise forming a base region on a surface of a metal member by repeatedly scanning along a predetermined first direction while irradiating the surface of the metal member with a base laser beam over a first set of rows. The method further comprises forming a marking by repeatedly scanning along a predetermined second direction while irradiating the surface of the metal member with a marking laser beam over a second set of rows. The second direction is different from the first direction. An identification code having a predetermined pattern comprises a combination of the base region and the marking.

Methods and apparatus to identify additively manufactured parts are disclosed. An example apparatus includes a body, formed of layers layered substantially parallel to a base layer, composed of a first material having a first density, a first indicium embedded internally in the body as a void, and a second indicium on an external surface of the body, the second indicium aligning with the first indicium.

A printed wiring board includes a lower layer including conductor layers and insulating layers, a conductor layer formed on the outermost insulating layer in the lower layer, and a solder resist layer formed on the conductor layer such that the solder resist layer is covering the conductor layer on the outermost insulating layer, and a two-dimensional code structure formed on the lower layer and including the conductor layer and a portion of the solder resist layer such that the portion of the solder resist layer has openings forming exposed portions of the conductor layer and that the openings of the solder resist layer and the exposed portions of the conductor layer form the two-dimensional code structure. The conductor layer includes a portion corresponding to the two-dimensional code structure such that the portion of the conductor layer has a residual copper rate that allows the two-dimensional code structure to be read.

An engraved code includes a plurality of dot dented portions defined on an article. The engraved code includes an opening peripheral edge portion of each of the dot dented portions which has a polygonal or quadrilateral shape. This configuration leads to detection of each dot dented portion as a polygonal or quadrilateral dot.

An article allows an engraved code to be detected. The engraved code includes a plurality of dot dented portions defined on the article. Each of the dot dented portions has a quadrilateral pyramid shape with a coating layer on a prior stage dented portion having a quadrilateral pyramid shape. Corner dented portions dented at acute angles outward along a diagonal direction are defined at four corner positions of an opening peripheral edge portion of the prior stage dented portion.

The invention relates to a method for storage of information and to an information storage medium with increased storage density by mulit-bit coding.

Methods and apparatus to identify additively manufactured parts are disclosed. An example method of manufacturing includes layering a first set of layers of a first material via an additive manufacturing technique, the first material having a first density and layering a second set of layers of the first material via the additive manufacturing technique, the second set of layers to form a void embedded internally in the part, the void forming an indicium.