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    Switch chamber under vacuum functional reliability evaluation method
    2.
    发明专利
    Switch chamber under vacuum functional reliability evaluation method 未知

    公开(公告)号：DE4407870A1

    公开(公告)日：1995-09-14

    申请号：DE4407870

    申请日：1994-03-04

    Applicant: FORGENTA FORSCHUNGSTECHNIK UND

    Inventor： LEBEK ALEXANDER DR ,  OBST DANKWART DR

    IPC: G01R31/327 ,  H02B13/065 ,  G01R31/333

    Abstract: The method involves feeding power from a source (1) for the measurement to the unloaded switching chamber (2), e.g. a vacuum switch, over a limited period during mechanical opening or closing. The time variation of the discharge between the switch parts is detected, using a coupled inductor coil (4), by a measurement and storage appts. (6). At least two characteristic parameters extracted from the variation are compared with defined values and parameters derived for evaluation of the functional reliability. The characteristic parameters can be coupled with an additional quality parameter for the evaluation of the functional reliability. The characteristic parameters can be the maximum amplitude and the duration of the discharge.

    Arrangement for trace gas analysis
    3.
    发明专利
    Arrangement for trace gas analysis 未知

    公开(公告)号：DE4320607A1

    公开(公告)日：1994-12-22

    申请号：DE4320607

    申请日：1993-06-16

    Applicant: FORGENTA FORSCHUNGSTECHNIK UND

    Inventor： FISCHER GUNTHER DIPL PHYS ,  ROHDE MARTIN DIPL ING

    IPC: G01N27/66 ,  H01J47/02 ,  G01N27/64

    Abstract: Arrangement for trace gas analysis with a radiation source for UV light and with an ionisation chamber and an anode and a cathode assigned to the latter. In the case of such an arrangement, it is intended to improve the measuring accuracy and sensitivity. According to the invention, this is achieved by locating the ionisation chamber inside a space bounded by at least one anode (4.1; 4.2; 4.3) and at least one cathode (5.2; 6.2). In particular, an elongated anode (4.1; 4.2; 4.3) is arranged, to which an elongated cathode (5.2; 6.2) is assigned such that the ionisation chamber is formed as a flow channel (7.2; 8.2) between the two and such that the flow channel is covered on both sides of the anode and cathode vertically with respect to its extent between the anode and the cathode. The arrangement is suitable in particular for detecting pollutants.

    Electro=optical modulator for e.g. Q=switch or interferometry
    4.
    发明专利
    Electro=optical modulator for e.g. Q=switch or interferometry 未知

    公开(公告)号：DE19514517A1

    公开(公告)日：1996-10-17

    申请号：DE19514517

    申请日：1995-04-12

    Applicant: FORGENTA FORSCHUNGSTECHNIK UND

    Inventor： THOENIS THOMAS DIPL ING ,  HAENDEL HEINZ DIPL ING

    IPC: G02F1/03

    Abstract: The modulator has at least two electrodes (2,3) esp. for generating a predetermined phase angle between two linearly polarised waves perpendicular to each other. An active solid state crystal (1) is arranged between two separate transparent surface electrodes. Each electrode may be attached to a substrate (4,5) esp. on the crystal side of the substrate (4,5). The distance between the crystal and the electrodes is preferably between 0 and tenths of a micron. An immersion fluid e.g. glycerine, may be provided between the crystal and the electrodes. The active crystal may have a thickness of one to two millimetres. The substrate and electrodes preferably pass light in the wavelength range of between 180 and 1500 nanometres. The substrate may be made of quartz glass or a transparent material.

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