Abstract: A steam distributor for a coffee machine and a coffee machine are described. The steam distributor includes a rod-like distributor body and an outlet area for discharging steam and/or air from an interior of the distributor body into a surrounding of the distributor body. The outlet area is arranged on an outer surface of the distributor body and is configured to discharge the steam and/or the air in such a way that the steam and/or the air forms a flow which has a tangential flow direction with respect to the distributor body and flows tangentially out of the distributor body. This structure of the distributor body allows milk or a milk substitute liquid to be foamed advantageously, because a circular flow is produced in the milk or the milk substitute liquid.

Abstract: A coffee machine, a coffee bean container, and a system including a coffee machine and a coffee bean container are described. The coffee bean container has an identification element that is read by the coffee machine when the coffee bean container is placed on the coffee machine. Based on the information read from the identification element, a parameter set is applied to the coffee machine and the coffee machine is individually adjusted for the coffee bean container placed on it.

Abstract: An optical cable includes an optical fiber having a fiber core and a fiber cladding, and an output coupling plug at an output coupling-side fiber end of the optical fiber. The output coupling plug comprises at least one cladding light sensor arranged behind the output coupling-side fiber end and configured to measure cladding light that exits frontally from the fiber cladding at the output coupling-side fiber end.

Abstract: An optical cable includes an optical fiber having a fiber core and a fiber cladding, and an output coupling plug at an output coupling-side fiber end of the optical fiber. The output coupling plug comprises at least one cladding light sensor arranged behind the output coupling-side fiber end and configured to measure cladding light that exits frontally from the fiber cladding at the output coupling-side fiber end.

Abstract: An apparatus for coupling out radiation from an optical fiber, includes a housing, and a stop having a stop opening for delimiting an output coupling angle of radiation that is coupled out of an output end of the optical fiber to a maximum output coupling angle with respect to a central axis of the stop opening, wherein the stop is arranged in the housing. The stop has a stop body made from a transparent material, the stop body has a first total internal reflection face for reflecting radiation that is coupled out of the output end of the optical fiber with greater output coupling angles than the maximum output coupling angle, and the stop body has a second total internal reflection face for reflecting radiation that propagates opposite to the radiation coupled out of the output end and is reflected back by a workpiece.

Abstract: An apparatus for coupling out radiation from an optical fiber, includes a housing, and a stop having a stop opening for delimiting an output coupling angle of radiation that is coupled out of an output end of the optical fiber to a maximum output coupling angle with respect to a central axis of the stop opening, wherein the stop is arranged in the housing. The stop has a stop body made from a transparent material, the stop body has a first total internal reflection face for reflecting radiation that is coupled out of the output end of the optical fiber with greater output coupling angles than the maximum output coupling angle, and the stop body has a second total internal reflection face for reflecting radiation that propagates opposite to the radiation coupled out of the output end and is reflected back by a workpiece.