Abstract: In a printed circuit board pair, each of the printed circuit boards having a contact region with contact elements, a contact-making system includes a first circuit board having three-dimensionally structured contact elements and a second circuit board also having three-dimensionally structured contact elements structured complementarily with respect to the contact elements of the first circuit board for positioning the two boards together. The contact elements of the first board reciprocally electrically contact the contact elements of the second board. The configuration ensures a high positioning accuracy of the two contact regions with respect to one another. A mask having cutouts for contact elements of the two boards can be provided. Such contact element positioning using the conductor track pattern and being independent of a contact-making housing has the advantage that the positioning accuracy is unaffected by tolerances between the conductor track pattern and the contact-making housing.

Abstract: An electrical connector includes a connector housing formed of a connector body carrying contact pins and a fixing part. A receiving gap for a foil conductor is formed between the connector body and the fixing part. At least some of the contact pins carry at least one contact element protruding into the receiving gap to make contact with a conductor track of the foil conductor. The fixing part is in the form of a sleeve and receives at least one longitudinal portion of the connector body, in an assembled state. The receiving gap, which is formed by an inner surface of the fixing part and a peripheral surface of the connector body, at least partially encloses the connector body.

Abstract: In order, in the context of making contact between two printed circuit boards (2, 4), to ensure a high positioning accuracy of their two contact regions (8) with respect to one another, the two contact regions (8) are three-dimensionally structured complementarily with respect to one another. A mask (12) having cutouts (14) for contact elements (10) of the two printed circuit boards (2, 4) is preferably provided. This positioning using the conductor track pattern and independently of a contact-making housing (26) has the advantage that the positioning accuracy is unaffected by tolerances between the conductor track pattern and the contact-making housing (26).

Abstract: A method of producing an optical component for the transmission of UV light is provided. An optical fiber is prepared from synthetic quartz glass or from doped synthetic quartz glass with a transmission region for the transmission of UV light, and the transmission region is charged with hydrogen and/or with deuterium. The charging includes coating the fiber with a blocking layer inhibiting hydrogen diffusion, and charging the fiber in an atmosphere containing hydrogen and/or deuterium. This atmosphere is under a pressure in the range from 0.1 MPa to 200 MPa and at a temperature between 100° C. and 800° C. so as to produce a concentration of said hydrogen and/or deuterium of at least 5×1019 molecules/cm3 in the transmission region. The coating and charging steps may be performed repeatedly, and the blocking layer is built up to comprise a plurality of thinner layers including a top layer, after application of which charging is discontinued.

Abstract: The invention relates to a method of measuring the eccentricity of a waveguide embedded in a cylindrical connector pin. The optical center of the end face of the waveguide is introduced into the mechanical axis of rotation of a distance sensor scanning the outer surface of the connector pin. Subsequently, the eccentricity of the waveguide is determined from the measuring values obtained during the relative rotation of the distance sensor along the outer surface of the connector pin.

Abstract: The connection end of a light waveguide (LWG) is bonded to a holder for use in coupling the LWG to a plug connector. Two axially extending centering surfaces are provided which enable aligning the connection end of the LWG in a guide groove of the connector. Such centering surfaces are exposed axial zones of the glass sheath layer of the LWG, in which zones the outer primary coating of the LWG have been removed. Removal thereof is preferably effected by a cutting tool.

Abstract: The invention relates to a method of measuring the optical radiation energy reflected by a reflection place as a relative fraction of energy supplied by an optical transmitter via an optical line. Using few components, reliable and constantly exact measuring values can be obtained in that the optical line (12,25) is connected to a backscattering measuring device (1) (OTDR) which transmits radiation in known manner via an optical connector (5) and which comprises a reception and evaluation device (6 and 7, respectively) for forming a measuring value which is proportional to the optical power backscattered in the optical connector (5) of the backscattering measuring device (1) and in that a reflection element (17, 19) having known reflection factor R.sub.N is arranged in the optical path between the connector (5) of the OTDR (1) and the end of an optical path comprising the reflection area (9) to be examined.

Abstract: The invention relates to a plug connector for the ends of two light waveguides (LWG) which are connected to holders and are pressed in the guide groove of a guide element and are pressed against each other with their end faces by means of an elongate resilient element. In order to substantially avoid damage of the LWG in the coupling process and to ensure a constantly good and low-damping optical connection, the guiding devices are constructed so that at least one of the ends of the LWG (2) can first be moved with a free space over the guide groove over such a distance to the other LWG (1) that a small axial distance remains between the end faces of the LWGs (1, 2) that the LWG (2), while maintaining a small axial distance, is then pressed into the guide groove and that by further movement of the LWG (2) in the guide groove a resilient engagement of the end faces of the LWGs (1, 2) to be connected is then obtained (FIG. 1).

Abstract: The invention relates to a plug pin for a light waveguide (LWG) which can be plugged in a pin bushing, comprising a core tube having a central aperture into which core the LWG can be inserted and which tube is enveloped by a sleeve made of a material which is softer than that of the core tube and which has a higher coefficient of thermal expansion. A plug connection which is low-loss in a large temperature range is obtained in that the wall thicknesses of the sleeve (3) and of the core tube (2) are proportioned so that the resulting coefficient of thermal expansion of the plug pin corresponds substantially to the value of the material of the pin bushing (4).