3M

About: 3M is a company organization based out in Saint Paul, Minnesota, United States. It is known for research contribution in the topics: Layer (electronics) & Coating. The organization has 7603 authors who have published 7907 publications receiving 254227 citations. The organization is also known as: Minnesota Mining and Manufacturing Company & 3M Company.

Reflective polarizer with brightness enhancement

Abstract: A multiple layer reflective polarizer (12) is described. This element is placed between an optical cavity (24) and an LCD module (16) to form an optical display. The reflective polarizer reflects some light into the optical cavity (24) where it is randomized and may ultimately emerge with the correct polarization to be transmitted out of the display.

Composite materials and process

Abstract: Composite films and film laminates comprising at least one elastomeric core and a surrounding nonelastomeric matrix preferably prepared by coextrusion The film when stretched and allowed to recover will create an elastomeric composite

Multilayer film having a continuous and disperse phase

Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix The film is oriented, typically by stretching, in one or more directions The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film

Method of making polytetrafluoroethylene composite sheet

Abstract: A polytetrafluoroethylene composite sheet having a tensile strength of at least one megapascal and comprising particulate material distributed in a matrix of interentangled polytetrafluoroethylene fibrils. The composite sheet is prepared by blending the particulate material with polytetrafluoroethylene aqueous dispersion in the presence of sufficient lubricant water to exceed the absorptive capacity of the solids yet maintain a putty-like consistency, subjecting the putty-like mass to intensive mixing at a temperature between 50° C. and 100° C. to cause initial fibrillation of the polytetrafluoroethylene particles, biaxially calendering the putty-like mass to cause additional fibrillation of the polytetrafluoroethylene particles while maintaining the same water content and drying the resultant sheet.

Method and apparatus for machine vision classification and tracking

Abstract: A method and apparatus for classification and tracking objects in three-dimensional space is described. A machine vision system acquires images with a video camera (2) from roadway scenes (6) and processes the images by analyzing the intensities of edge elements within the image. The system then applies fuzzy set theory to the location and angles of each pixel after the pixel intensities have been characterized by vectors. A neural network interprets the data created by the fuzzy set operators and classifies objects within the roadway scene (6). The system also includes a tracking module (22) for tracking objects within the roadway scene, such as vehicle, by forecasting potential track regions and then calculating match scores for each potential track region based on how well the edge elements from the target track regions match those from the source region as weighted by the extent the edge elements have moved.