A trim element having a coating layer defining an outer surface and an inner surface, the coating layer including at least two distinct backlit pattern areas separated by at least one opaque area preventing the passage of light from the inner surface to the outer surface. The trim element includes at least one light source for each backlit pattern area, the light source being fixed on the inner surface of the coating layer facing an opaque area while being spaced apart from the corresponding backlit pattern area. The trim element has one light guide per backlit pattern area.

A method for manufacturing a Paspol light guide includes disposing a plurality of light guides adjacent to one another so that the light guides form a light-guide bundle, disposing an at least partially light-transparent fabric along at least one partial section of the light-guide bundle, sheathing the light-guide bundle by the fabric so that the fabric forms a fabric sleeve, and closing the fabric sleeve along its longitudinal side. When viewed in a cross-section, the fabric sleeve forms a flag protruding from the light-guide bundle.

An optical article for directing and distributing light including an optically transmissive layer having one or more arrays of TIR channels and a light diffusing element disposed in optical communication with the optically transmissive layer. The TIR channels define reflective surfaces extending perpendicular or near-perpendicular to a prevailing plane of the optically transmissive layer. The TIR channels and the light diffusing element operate concurrently to redirect and redistribute a beam of light received from a light source such as daylight or an LED over a broad angular range.

An apparatus for forming a serration pattern on a light guide plate having a top surface emitting a light, a bottom surface opposite to the top surface, and at least one side surface, arranged between the top surface and the bottom surface, as an incident surface. The apparatus includes a base plate supporting the bottom surface of the light guide plate; a fixing plate facing the top surface of the light guide plate with a predetermined interval; and a serration core transferring the serration pattern onto the at least one side surface of the light guide plate by a thermal pressing process causing a thickness deformation of the light guide plate. Further, the fixing plate induces a changed thickness of the light guide plate to be uniform by limiting a thickness change amount of the light guide plate to the predetermined interval.

An optical fiber is a linear radiator uniform in the longer direction thereof, and a lighting device uses the optical fiber. The optical fiber is a lighting fiber having a core and a cladding. In the fiber, as the cladding, there is used a polymer obtained by polymerizing a polymerizing ingredient containing 90% or more by weight of vinylidene fluoride, and the cladding has a crystallinity of 45% to 52%.

A compact method for forming strong hermetic bonds and seals. Such bonds are made simply and with no intervening adhesives, by directly melting a thermoplastic polymer against or between two surfaces of thermoset materials.

A fiber optic ferrule assembly is provided, which comprises a ferrule and an optical fiber received in the ferrule. The ferrule and the optical fiber are directly joined together, so as to fix the optical fiber in the ferrule. At least a part of the ferrule is directly over-molded on the optical fiber by injection molding or shrunk on the optical fiber. In the embodiments of the present invention, the ferrule is directly over-molded or shrunk on the optical fiber, so that the ferrule and the optical fiber are directly joined together. As a result, the optical fiber is stably fixed in the ferrule.

A waveguide with a hollow core (16) delimited by a closed contour includes a succession of arcs (20) of negative curvature, each arc including a chord (24), characterized in that the contour of the hollow core (16) includes small arcs (PA) and large arcs (GA) arranged alternately, each arc (20) being symmetric with respect to a straight line passing through the center (18) of the hollow core (16) and the middle of the chord (24) thereof, the ratio b=2Ra/C of the large arcs being greater than 0.9 for the large arcs (GA), Ra corresponding to the maximum distance between the chord (24) and the arc (20), C corresponding to the length of the chord (24).

Technologies are generally described for fabricating a self-writing waveguide. Two photo-reactive liquid monomers, each infused with a photo-initiator, may be mixed and dissolved in a carrier solvent to form a mixture. Nanoparticles may be added to the mixture to form a gel. A focused light beam may be provided to cure one of the monomers, initiating polymerization to form a core of the self-writing waveguide. An optional exposure to an optical source, a heat source, or an electron beam source may cure the other monomer, initiating polymerization to form a cladding of the self-writing waveguide. The self-writing waveguide may be formed in a substantially tubular structure or a planar film structure.

An electronic device may have a housing with a display. A protective display cover layer for the display may have an image transport layer such as a fiber optic plate. The fiber optic plate may be formed from fibers. An extruder may form fiber bundles that each include a respective plurality of fibers distributed in binder material. The fiber bundles from the extruder may be fed directly to a block forming die. The block forming die may receive the fiber bundles from the extruder and output a unitary fiber block. The fiber bundles may remain heated in the block forming die such that the binder material of the fiber bundles seamlessly merges during formation of the unitary fiber block. A cutter can be used to cut off a layer of the unitary fiber block. This layer may be machined and polished to form the fiber optic plate.