摘要:
Particles having a first region and a second region surrounding the first region where the second region includes a copolymer extending across a thickness of the second region are described. The volume of the second region is at least 75 percent of the volume of the particle. The particles have a composition and a refractive index that each vary across the thickness of the second region.
摘要:
A solid state light having a solid state light source such as LEDs, a light guide having an enclosed interior volume such as a bulb shape without vents, and a thermal guide. The light guide is coupled to the light source for receiving and distributing light from the light source. The thermal guide is at least partially contained within the interior volume with an air gap between a portion of the thermal guide and the light guide. The thermal guide provides for thermal conduction from the light source and dissipating heat through convection and radiation for cooling the light.
摘要:
Transfer tapes include an optically transparent adhesive layer with a first major surface and a second major surface, with at least one of the major surfaces including a microstructured pattern that is a permanent feature of the adhesive surface. The microstructured surface alters the direction of light. The optically transparent composition may include a low Tg polymeric component with a Tg of less than 20° C., and an acid or base functionality, and a high Tg polymeric component with a Tg of greater than 20° C., and an acid or base functionality, such that the functionality of the low Tg polymeric component and the functionality of the high Tg polymeric component form an acid-base interaction when mixed. The transfer tapes can be adhered to substrates to provide a microstructured surface to the substrate surface.
摘要:
An optical light redirecting film that can be made by microreplication, and that is suitable for use in an autostereoscopic backlight or display, includes opposed first and second structured surfaces. The first structured surface includes lenticular features and the second structured surface includes prismatic features. In some cases, at least a first prismatic feature has a first prism optical axis that is tilted relative to a thickness axis of the film perpendicular to the film plane. In some cases, at least a first lenticular feature has a first lenticular optical axis that is tilted relative to the thickness axis. In some cases, the film may have a central film caliper (thickness) at a central portion of the film and an edge film caliper at a first edge portion of the film, the central film caliper being greater than the edge film caliper.
摘要:
Microstructured features having a variable pitch or angles on a birefringence surface of an article and a process for making it. The article is uniaxial oriented to provide the birefringence. The variable pitch provides for various optical effects and can include a random pitch, periodic pitch, quasi-periodic pitch, or a combination of them.
摘要:
A lighting component including an optical volume and a switchable diffuser disposed at least partially within the optical volume is described. The optical volume includes a light injection region, at least one reflective or transflective outer major surface, and an output major surface. The at least one reflective or transflective outer major surface defines opposing boundaries of the optical volume. The output major surface is adjacent one or more distal edges of the at least one reflective or transflective outer major surface. The switchable diffuser has at least a first state and a second state. The switchable diffuser may have a surface normal that is not parallel to an optical axis of the optical volume. The at least one reflective or transflective outer major surface may have a spatially varying reflective property.