The present invention relates to a replication tool for replicating an element from a replication material, the replication tool comprising a replication side, a plurality of cavities on the replication side, each defining the shape of one element or a group of elements, the replication tool further comprising at least one bump portion, protruding, on the replication side, from the cavities, and further comprising means for confining the replication material to a predetermined area of the tool, when the tool is pressed against a substrate, which predetermined area exceeds the desired volume of the element in at least one direction along the surface of the substrate.

A lens plate includes a transparent substrate wafer, and a plurality of lenses and spacers that are formed of a single portion of material on the transparent substrate wafer. An assembly includes a first lens plate that includes a first transparent substrate wafer, a plurality of first lenses and a plurality of spacers, the first lenses and spacers being formed of a single portion of material on said first transparent substrate wafer. The assembly also includes a second lens plate that includes a second transparent substrate wafer and a plurality of second lenses formed thereon, each of the plurality of second lenses corresponding to a respective one of the plurality of first lenses. The lens plates are aligned such that each of the plurality of first lenses aligns with the respective one of the plurality of second lenses, and the lens plates are bonded to one another.

A method for the production of an optical glass element, with the following process sequence: a) applying a liquid embossing material on an embossing die, b) embossing the embossing material at a temperature of less than 500° C., c) hardening the embossing material, d) sintering the embossing material and thus executing the primary forming of the optical glass element. In addition, an optical glass element that is produced with the method, a device for implementing the method, and a use of this device are disclosed.

A resin amount for forming each first-stage resin layer portion (a first-stage resin replica portion) 41da in a first process is defined to be greater than a resin amount for forming each second-stage resin layer portion (a second-stage resin replica portion) 41db in a second process. Therefore, at a boundary between the first-stage resin layer portion 41da and the second-stage resin layer portion 41db, a joint portion 48 at which resin overlaps is formed, whereby occurrence of an undercut shape can be avoided. Therefore, in a molding process using a sub-master die 40 and a sub-sub-master die 50 obtained from the sub-master die 40, occurrence of an undesired shape can be avoided, whereby mold release resistance can be reduced or eliminated.

An embodiment of the present disclosure may provide a microlens array including: an optical substrate configured to define multiple cells; and multiple microlenses distributed on the optical substrate and having angle profiles or tilting profiles, wherein angle profiles of the multiple cells are defined based on the shapes of edges of the cells, and tilting profiles of the multiple cells are defined based on the tilts of the microlenses or the tilt of the optical substrate.

A microlens array substrate includes a substrate. A plurality of first recesses are provided in a first area of a surface of the substrate. A plurality of second recesses are provided in a second area of the surface of the substrate. The second area is outside of the first area. A light transmission layer has a refractive index which is different from a refractive index of the substrate and is provided to cover the surface of the substrate and to bury the first recesses and the second recesses. Each of the first recesses has a first depth from a surface of the light transmission layer. Each of the second recesses has a second depth from the surface of the light transmission layer. The second depth is deeper than the first depth.

An optical lens assembly includes at least one dual molded lens element. The dual molded lens element has a central axis, and includes a light transmitting portion and a light absorbing portion. The light transmitting portion includes an optical effective region and a lens peripheral region, and the lens peripheral region surrounds the optical effective region. A 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 the light absorbing portion includes at least three gate portions surrounding the central axis, wherein all gate portions are located on the same surface of the dual molded lens element. The light transmitting portion and the light absorbing portion of the dual molded lens element are integrally formed by the injection molding.

Various embodiments include a display panel with integrated micro lens array. The display panel typically includes an array of pixel light sources (e.g., LEDs) electrically coupled to corresponding pixel driver circuits (e.g., FETs). The array of micro lenses are aligned to the pixel light sources and positioned to reduce the divergence of light produced by the pixel light sources. The display panel may also include an integrated optical spacer to maintain the positioning between the micro lenses and pixel driver circuits.

This invention relates to a die tool, a device and a method for producing, in particular embossing, a monolithic lens wafer that has a large number of microlenses.

Provided is a molded article that has such a shape as to offer a light condensing or light diffusing effect, has excellent mechanical strengths and heat resistance, and has a high thickness deviation ratio. This molded article includes a cured product of a curable composition containing an epoxy compound (A). The cured product has a flexural modulus of 2.5 GPa or more as measured in conformity with JIS K 7171:2008, except for performing measurement on a test specimen having a length of 20 mm, a width of 2.5 mm, and a thickness of 0.5 mm and at a span between specimen supports of 16 mm. The molded article has a thickness deviation ratio (thickest portion thickness to thinnest portion thickness ratio) of 5 or more and offers a light condensing or light diffusing effect. The molded article preferably has a thinnest portion thickness of 0.2 mm or less. The curable composition is preferably a photocurable composition.