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AssigneeFelten & Guilleaume Energietechnik GmbH
InventorsHelmut Federmann, Friedrich K. Levacher, Georg Noack, Anton Kraus
Estimating the term…
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.
An arrangement of a light wave conductor-phase sensor for measuring minute elongations, comprising a series connection of an emitter of polarized light, a light wave conductor-phase sensor, a light beam divider for dividing the measuring light beam at the output of the sensor into three partial light beams, three light receivers for receiving respective partial light beams and generating electrical output signals corresponding to received light intensities, a first partial light beam being transmitted to the first light receiver via a direct transmission channel, a second partial light beam being transmitted to the second light receiver via a transmission channel including a quarter wave length (.lambda./4) plate and a light analyzer, and the third partial light beam being transmitted to the third light receiver via a transmission channel including a light analyzer, and electrical measuring means for evaluating said electrical output signals.
Dependencies are inferred from the claim text.