Abstract: Certain aspects of the present disclosure can be implemented in an electroacoustic device. The electroacoustic device generally includes: a substrate; a bottom electrode layer disposed above the substrate; an acoustic mirror stack having a dielectric layer disposed above the bottom electrode layer and a conductive layer disposed above the dielectric layer; a piezoelectric layer disposed above the acoustic mirror stack; and one or more vias disposed between the bottom electrode layer and the conductive layer, the one or more vias electrically coupling the bottom electrode layer and the conductive layer.

Abstract: The light of luminous units known in prior art is laterally radiated, wherefore LEDs (10 to 13) have to be arranged in an inclined manner on separate sheet metal supports, conductor films, or printed circuit boards. Using such supports and fastening the LEDs (10 to 13) is technically complex and costly. In order to be able to arrange the laterally radiating luminous means (10 to 13) in a simple, low-cost manner without using any additional supports, said luminous means (10 to 13) is provided with a fully reflecting surface (14), on which the beams (S) are reflected towards a reflector (3) that reflects the beams (S) in the direction of a light disk (2). The fully reflecting surface (14) can be arranged according to specific requirements in such a way that the light falls in the desired direction. No additional supports are required. The inventive luminous unit is preferably used in sideview mirrors of motor vehicles but can also be used in all areas of signal technology and illumination engineering.

Abstract: A light assembly for exterior rearview mirrors of vehicles has a support and one or more first LEDs provided as luminous bodies arranged on the support. Two or more second LEDs are provided as luminous bodies and arranged on the support. The first LEDs have a current intensity that is higher than the current intensity of the second LEDs. At least one of the first LEDs is series connected to at least two of the second LEDs, and the at least two second LEDs are parallel connected to one another.

Abstract: A light assembly for exterior rearview mirrors of vehicles has a support and one or more first LEDs provided as luminous bodies arranged on the support. Two or more second LEDs are provided as luminous bodies and arranged on the support. The first LEDs have a current intensity that is higher than the current intensity of the second LEDs. At least one of the first LEDs is series connected to at least two of the second LEDs, and the at least two second LEDs are parallel connected to one another.

Abstract: An optical cable element (5) includes several optical fibers (1) arranged concentrically around a central thread (3) and surrounded by a common envelope (4). The envelope (4) is made of a plastic which adheres to the optical fibers (1), so that after the cable element (5) has been slit open along its longitudinal axis, the round cable element is transformable into a ribbon element in the slit area, which facilitates multiple splicing. Also disclosed are a multiple-fiber tube unit and optical cables containing several such cable elements.