Abstract: A stack of light-deflecting elements are installed in a window. Each deflecting element has a solar ray inlet, a curved middle section and an end comprising a ray outlet into the room. Each element is rectilinear at the outlet end so that rays are dispersed and emerge from the light-deflecting elements in prisms of rays, the bottom edge of which is horizontal. The solar rays entering the light-deflecting elements are subjected to multiple total internal reflections at a different angle. The angle of the normal line of the deflector elements to the horizontal is selected so that the largest possible amount of sunlight can be captured and conveyed into the room to illuminate the room with a uniform, diffuse distribution.

Abstract: To enable a continuous measurement of damping of a light beam in light wave conductor (LWC)-sensor which is accessible at one end only, a measuring light beam emitted by a transmitter is guided through a light wave conductor into a beam divider in which a measuring partial light beam is guided in the same direction as the transmitted beam to a measuring LWC-sensor. At the free end of the sensor the measuring partial light beam is totally reflected to propagate in reverse direction back against the beam divider where it is deflected by 90.degree. and guided into a light receiving and measuring unit. The other partial light beam is employed either for the temperature compensation or for the compensation of the power output of the light transmitter or of sensitivity of the light receiver.

Abstract: A device for measuring minute elongations of a light wave conductor is constructed as a light wave conductor-type sensing unit assembled of a series connection of a polarizer, a light coupler, a single polarization preserving, doubly refracting monomode light wave conductor enclosed in an elliptical sheathing and an analyzer. A light beam emitted from a laser diode is coupled via a light wave conducting correction cable to the polarizer and upon passage through the sensing unit is coupled via the light wave conducting connection cable to an optoelectric receiver and the electrical signals are evaluated in an electronic circuit. Changes in phase difference of the exiting light wave resulting from the minute changes in length of the light wave conductor are evaluated and scaled as geometric length units.

Abstract: To measure exactly minute elongations, for example on airplanes or bridge structures by means of a light wave conductor-phase sensor, the measuring beams of polarized light at the output of the sensor is divided by means of a beam divider into three partial light beams. The first partial light beam is directly received by a first light receiver; the second light beam is transmitted through a quarter wavelength plate and an analyzer to the second light receiver; and a third partial light beam is transmitted through an analyzer to the third light receiver. The electrical output signals from the light receivers carry information about extreme refraction values of the measuring light beam and are supplied to an electronic evaluation circuit.

Abstract: A light wave conductor-sensor for tension, comprises a primary coated light wave conducting element, at least one coil wound on the primary light wave conducting element and forming together with the latter a sensor core, and a compound including longitudinally extending tension-proof fibers embedded in a synthetic plastic matrix, the compound forming a casing for the sensor core.

Abstract: A structural element is provided with at least one light conduit which is arranged thereon under a selected mechanical initial stress. In this manner, the deformation or breakage can be detected at loads or deformations which are lower than the breaking loads or deformations of the component parts to be monitored.

Abstract: A high tensile wire of a fiber-reinforced synthetic resin encloses an axially arranged light guide in the form of an optical fibers connectable to a light testing instrument. The light guide is enclosed in an intermediate sleeve of a heterogeneous synthetic material which is mechanically firmly connected both to the light guide and to the inner surface of the outer sleeve. In the preferred embodiment, the wire is used as a reinforcing span wire in concrete component parts and the attenuation of the light passing through the light guide indicates tensile strength, bending strength or breakage of the wire in the concrete.

Abstract: A drive shaft for motor vehicles has a tubular shaft portion of synthetic plastic resin in which fibers are embedded. Metallic end pieces are in part received in and bonded to the shaft portion; connecting elements can be connected to the parts which project outwardly from the shaft portion. A method of making this shaft is also disclosed.

Abstract: A drive shaft, particularly for motor vehicles, has a tubular shaft part of a fiber reinforced synthetic plastic material, two end pieces each associated with respective one of the end portions of the shaft and having sleeve-shaped and ring-shaped sections, and a plurality of anchoring pins arranged on the end pieces on the region between the sleeve-shaped and the ring-shaped section at circumferentially spaced locations.

Abstract: A drive shaft, particularly for motor vehicles, has metallic end members having facing axially inner sections of larger diameter, axially outer sections of smaller diameters and transition sections connecting the inner and outer sections. The end members are, with the exception of small axial lengths of the outer sections, embedded in and surrounded by a tubular shaft member which is constructed by winding a plurality of layers of carbon or glass-fiber roving impregnated with synthetic plastic, onto a lost mandrel and heat-hardening the synthetic plastic.