A process to enhance the performance of plastic optical fiber to operate with a high data rate (e.g., at least 1 gigabit per second) at high temperature (e.g., 100 degrees Celsius) for airplane avionic systems. Gigabit plastic optical fiber has a core including a dopant that enables data transmission at gigabit rates. The enhancement process uses rapid thermal cooling of the gigabit plastic optical fiber to stabilize the polymer matrix of the fiber. This rapid cooling treatment blocks dopant diffusion in a high-temperature environment, thereby avoiding degradation of the fiber's bandwidth and optical loss characteristic. Such degradation typically occurs in gigabit plastic optical fiber having core and cladding made of transparent carbon-hydrogen bond-free perfluorinated polymer.

A light guide plate integrated trim panel for a vehicle is provided and includes, in the trim panel for the vehicle mounted to an interior trim of the vehicle, a light guide plate configured to diffuse light emitted from a light source; and a base formed to surround the circumference and the bottom surface of the light guide plate, wherein the side surface of the light guide plate is formed to be stepped to be fixed by the base holding the circumference of the light guide plate.

A method for fabricating a ceramic matrix composite structure. A core having an ordered structure is fabricated of a preceramic polymer and pyrolyzed. Facesheets, either uncured or cured, are placed on the core (with a bonding layer of preceramic polymer resin if the facesheets are cured) and the assembly is cured and pyrolyzed. The pyrolyzed assembly is re-infiltrated with preceramic polymer resin and re-pyrolyzed. The cycle of re-infiltration and re-pyrolyzation is repeated until the mass gain per cycle stabilizes.

An optical device, including a light waves-transmitting substrate has two major surfaces and edges, optical means for coupling light into the substrate by total internal reflection, and a plurality of partially reflecting surfaces (22a, 22b) carried by the substrate. The partially reflecting surfaces (22a, 22b) are parallel to each other and are not parallel to any of the edges of the substrate, one or more of the partially reflecting surfaces (22a, 22b) being an anisotropic surface. The optical device has dual operational modes in see-through configuration. In a first mode, light waves are projected from a display source through the substrate to an eye of a viewer. In a second mode, the display source is shut off and only an external scene is viewable through the substrate.

A method of manufacturing an optical fiber, in which a coating is provided on a bare optical fiber, includes winding the optical fiber around a bobbin such that a strain sensing coefficient T.sub./KL is greater than 0 and less than or equal to 973, and a one-layer strain .sub.n is greater than or equal to 0.01.

A process to enhance the performance of plastic optical fiber to operate with a high data rate (e.g., at least 1 gigabit per second) at high temperature (e.g., 100 degrees Celsius) for airplane avionic systems. Gigabit plastic optical fiber has a core including a dopant that enables data transmission at gigabit rates. The enhancement process uses rapid thermal cooling of the gigabit plastic optical fiber to stabilize the polymer matrix of the fiber. This rapid cooling treatment blocks dopant diffusion in a high-temperature environment, thereby avoiding degradation of the fiber's bandwidth and optical loss characteristic. Such degradation typically occurs in gigabit plastic optical fiber having core and cladding made of transparent carbon-hydrogen bond-free perfluorinated polymer.

A waveguide includes an input area, a multi-layered substrate, and an output area. The multi-layered substrate includes a plurality of layers of at least a substrate and at least one partially reflective layers. The input area in-couples light in a first band into the waveguide. The one or more partially reflective layers are partially reflective to light in the first band. Each of the one or more partially reflective layers are located between respective layers of the plurality of layers of the substrate. The output area out-couples light from the waveguide. The pupil replication density of the out-coupled light is based in part on a number of the one or more partially reflective layers and respective locations of the one or more partially reflective layers in the waveguide.

A method of forming a three-dimensional object (e.g. comprised of polyurethane, polyurea, or copolymer thereof) is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid comprising a mixture of: (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from the first component; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the second solidifiable component; and then (d) contacting the three-dimensional intermediate to water to form the three-dimensional object.

A wavelength shifting fiber and method of making the same is disclosed. A wavelength shifting fiber can include a plastic core and a coating surrounding the plastic core. The numerical aperture for the wavelength shifting fiber can be at least about 0.53. A method of making a wavelength shifting fiber can include heating and drawing a plastic core precursor to form a plastic core, coating the plastic core with a liquid coating, and curing the liquid coating around the plastic core to form a wavelength shifting fiber.

The present invention discloses a precise extrusion and transfer apparatus for light guide plate production, including: a feed hopper; a dehumidifying and drying device; a screw conveyor fixedly mounted on one side of the outer wall of the dehumidifying and drying device; a screw extrusion device; and a molding box fixedly mounted with first motors and a second motor on one side of the outer wall by means of bolts, where power output ends of two sets of first motors pass through the molding box and are fixedly mounted with first precise roller bearings by means of rotating shafts, and a power output end of the second motor passes through the molding box and is fixedly mounted with a second precise roller bearing by means of a rotating shaft. According to the present invention, one-step molding from a particle base material to a finished light guide film is implemented, the problem of warpage is overcome, the production efficiency is improved, and the production cycle can be shortened to 1 s; and the product is thinner and can be as thin as 80 m, the production costs such as material consumption and labor are greatly reduced, key indicators of the product such as brightness and light transmittance of the light guide film are comprehensively improved, and the advantages in quality and costs are enabled in fierce market competition.