Abstract: A method for production of a substrate having a patterned optical coating on a curved surface is provided. The method includes applying a masking to a sub-area of the curved surface applying an optical coating using a vacuum deposition method, and removing the masking. A coated substrate, which can be produced in particular by the method described above, is also provided. The coated substrate includes a curved surface that is provided with at least one patterned optical coating. The at least one patterned optical coating is provided on at least one sub-area of the curved surface and is missing on at least one adjacent sub-area.

Abstract: The invention provides a process for producing at least one optical filter layer segment on a substrate. The process includes applying a masking comprising a resist layer on a surface of the substrate, depositing an optical filter layer on the surface and the resist layer by vacuum deposition, and removing the resist layer with a portion of the optical filter layer thereon from the surface. The deposition of the optical filter layer, at least at times, takes place at a temperature of over 150° C., preferably in a range from over 150° C. up to and including 400° C.

Abstract: A method for production of a substrate having a patterned optical coating on a curved surface is provided. The method includes applying a masking to a sub-area of the curved surface, applying an optical coating using a vacuum deposition method, and removing the masking. A coated substrate, which can be produced in particular by the method described above, is also provided. The coated substrate includes a curved surface that is provided with at least one patterned optical coating. The at least one patterned optical coating is provided on at least one sub-area of the curved surface and is missing on at least one adjacent sub-area.

Abstract: The invention provides a process for producing at least one optical filter layer segment on a substrate. The process includes applying a masking comprising a resist layer on a surface of the substrate, depositing an optical filter layer on the surface and the resist layer by vacuum deposition, and removing the resist layer with a portion of the optical filter layer thereon from the surface. The deposition of the optical filter layer, at least at times, takes place at a temperature of over 150° C., preferably in a range from over 150° C. up to and including 400° C.

Abstract: Shifts in rock strata are measured be inserting into a bore hole in the rock a conductive tube in which an insulated conductor runs along the length and the continuity is measured between the conductor and the tube. When conductivity is detected, the shift in the strata amounts to the distance required for the tube wall to break the insulation and create an electrical content between the tube and the conductor.

Abstract: A method of manufacturing a hollow spindle, especially for the pivotal mounting of valve-actuating levers to control exhaust-and-intake valves of an internal combustion engine. The spindle has an outer tube, in the interior of which a shaped tubular body is fixed in order to form at least two liquid-carrying chambers. To form a chamber, the tubular body is provided with a cutout extending in the longitudinal direction. The tubular body is a shaped inner tube that, seen in cross-section, has an inwardly-curved region that makes a rounded and stepless transition to the circular region, and of the tubular body. At least the circular region is joined by virtue of its material to the outer tube.