Abstract: Multi-color light sources are mixed in a recycling housing to achieve high light output. Light from each color light source is multiplexed and a portion of the mixed light passes through an output aperture in the light pipe and a portion light is recycled back, for example, by a shaped reflective surface and/or a reflective coating adjacent the aperture. In one embodiment, the light is directed back from the output side of the housing to an input light source having the same color. In another embodiment, the light is directed back from the output side of the housing to a coating designed to reflect that color. The reflected light is then reflected back toward the output aperture and a portion of that reflected light is again reflected toward the input and impacts the original source for that color light. In this way, light theoretically recycles infinitely.

Abstract: Multi-color light sources are mixed in a recycling housing to achieve high light output. In one embodiment, the light from each color light source, such as from red, green and blue LEDs, is multiplexed together and a portion of the mixed light passes through an output aperture in the light pipe. A portion of each colored light is recycled back, for example, by a shaped reflective surface and/or a reflective coating adjacent the aperture. The shape of the reflective surface is such as to direct each color of light back to a specific location to maximize the ultimate output light. In one embodiment, the light is directed back from the output side of the housing to an input light source having the same color. In another embodiment, the light is directed back from the output side of the housing to a coating designed to reflect that color light.

Abstract: A method and apparatus for testing rubber tires includes an abrader for rubbing against the surface of the tire and an eraser for removing particles of rubber left on the abrading surface by the tire. The eraser has the capability of absorbing oil or wax included in the tire being tested and in the particles deposited on the abrading surface.

Abstract: A method and apparatus for testing rubber tires includes an abrader for rubbing against the surface of the tire and an eraser for removing particles of rubber left on the abrading surface by the tire. The eraser has the capability of absorbing oil or wax included in the tire being tested and in the particles deposited on the abrading surface.

Abstract: An automated apparatus for testing a plurality of sample wheels includes a grindstone, a first programmable servo motor coupled to the grindstone, a plurality sample wheels disposed about a circumference of the grindstone, and a second programmable servo motor coupled to each of the plurality of sample wheels. In addition, the automated apparatus also includes a controller that outputs a first control signal to the first programmable servo motor and a second control signal to the second programmable servo motor to provide a variable slip ratio between the grindstone and the plurality of sample wheels. The controller includes a simulator that simulates a plurality of road conditions and varies the plurality of slip ratios to simulate the plurality of road conditions.