Abstract: A measuring head of the present invention conveys light from an external source through at least one optical fiber to at least one respective plane mirror inside the measuring head, where the light reflects through and is collimated by at least one collimating lens so as to be incident on a sample, in one embodiment, at an angle of substantially 45 degrees. The resulting optical path is folded once and thereby allows enough virtual space to redirect the light without excessive bending of the fibers. Light diffused from the sample is, in one embodiment, perpendicularly collected by a focusing lens, focused on the end of another optical fiber and directed outside of the measuring head to be used, for example, by a measuring instrument for the spectral analysis of the collected light.

Abstract: A measuring apparatus for measuring color characteristics of an object is provided. The apparatus includes at least two measuring units, each of which has at least one optical emitter and at least one optical receiver, wherein the measuring units are combined to form a measuring arrangement. The emitter has an illuminating angle and the receiver has a receiving angle, wherein relative to the object these angles are different for each measuring unit. Respective light guide terminals are provided for each measuring unit. A light source is connectable in common for at least two measuring units via a light guide and a light guide terminal. A detector is connectable in common for at least two measuring units via another light guide and light guide terminal. The light guide terminals can be selectively coupled with the light source and the detector.

Abstract: A measuring head of the present invention conveys light from an external source through at least one optical fiber to at least one respective plane mirror inside the measuring head, where the light reflects through and is collimated by at least one collimating lens so as to be incident on a sample, in one embodiment, at an angle of substantially 45 degrees. The resulting optical path is folded once and thereby allows enough virtual space to redirect the light without excessive bending of the fibers. Light diffused from the sample is, in one embodiment, perpendicularly collected by a focusing lens, focused on the end of another optical fiber and directed outside of the measuring head to be used, for example, by a measuring instrument for the spectral analysis of the collected light.

Abstract: The invention relates to a measuring device (1) comprising at least one measuring unit (2) that, in turn, comprises at least one optical transmitter (13) and at least one optical receiver (14). The inventive measuring device also comprises at least one light source (4), which is connected to the measuring unit (2) via a light guide (10), and comprises a detector (5), which is connected to the measuring unit (2) also via a light guide (10). The inventive measuring device enables a precise determination of color characteristics according to different angles. To this end, at least two measuring units (2) are combined to form a measuring arrangement (3), the measuring units (2) each have light guide terminals (16, 17), and these terminals (16, 17) can be coupled as desired to a light source (4), which is shared by at least two measuring units (2), or to a detector (5), which is shared by at least two measuring units (2).