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.

Article with holographic and retroreflective features

Abstract: An article is disclosed having both holographic and retroreflective features. The article includes a holographic layer that is perceptible under normal lighting conditions and substantially imperceptible to the unaided eye under retroreflective lighting conditions, a retroreflective layer perceptible under retroreflective lighting conditions, and means for bonding the two layers together.

Multifocal diffractive ophthalmic lens and method of manufacture

Abstract: A multifocal ophthalmic lens includes first and second lens members. Each lens member has a smooth outer surface and an inner surface with an edge about its perimeter. A multifocal diffractive zone plate on at least one of the lens members is characterized by an index of refraction. The lens members are joined at the edges by ultrasonic welding to form a cavity adjacent the diffractive zone plate. The cavity is filled with a liquid medication having an index of refraction which is different than the index of refraction of the diffractive zone plate. A hole through one of the lens members functions as a fluid transport mechanism to permit transfer of the medication between the cavity and eye.

Retroreflective sheeting having an abrasion-resistant ceramer coating

Abstract: Retroreflective sheeting having an abrasion-resistant ceramer coating that is prepared from about 20 % to about 80 % ethylenically unsaturated monomers; about 10 % to about 50 % of acrylate functionalized colloidal silica; and about 5 % to about 40 % N,N-disubstituted acrylamide or N-substituted-N-vinyl-amide monomer having a molecular weight between 99 and 500 atomic units; wherein said percentages are weight percents of the total weight of said coating. A method of coating retroreflective sheeting with an abrasion-resistant cured ceramer layer is also disclosed.

Abrasive article having a diamond-like coating layer and method for making same

Abstract: An abrasive article having a sheet-like substrate having at least one major surface; an abrasive coating adhered to the at least one major surface of the substrate, wherein the abrasive coating comprises a plurality of abrasive particles and an organic binder medium; and, a hard carbon coating layer comprising a diamond-like carbon film. The hard carbon coating layer in the coated abrasive article can be provided as a top coat or, alternatively, as located between the abrasive coating and a covering layer based on an organic binder layer. The invention also pertains to a method of making such an abrasive article.

Integrated retroreflective electronic display

Abstract: An integrated retroreflective data communication display (2) for visual and electromagnetic communication is described. The display (2) may be configured as an integrated retroreflective electronic license plate, with printed visual information (4), similar to the information printed on traditional license plates, on retroreflective sheeting (6). An antenna network (8) is integrated within the license plate for electromagnetic communication and may be connected to external electronic modules. The display may also be configured as an integrated retroreflective electronic road sign (140), also providing visual and electromagnetic information in a unitary structure.