| 摘要 |
The optical device is used for monitoring a rotatable shaft (10) with an orientated axis (13). It comprises at least one optical waveguide (20) which is arranged on the rotatable shaft (10), provided with at least one optical sensor (21) and via which the at least one optical sensor (21) can be queried by means of a light signal (LS). Further, it comprises a transmitting/receiving unit (40) which is arranged in a positionally fixed manner with respect to the rotatable shaft (10) and which can be used to transmit the light signal (LS). Additionally, the optical device has transfer means, which are used to transfer the light signal (LS) between the transmitting/receiving unit (40) which is arranged in a positionally fixed manner and the optical waveguide (20) which is arranged on the rotatable shaft (10), and has an evaluation unit (43) for determining a physical variable from a light signal (LS') coming from the at least one optical sensor (21) and transferred by the transfer means, with the evaluation unit (43) being associated with the transmitting/receiving unit (40). Here, the transfer means has in turn at least one optical 'multimode' waveguide (30), associated with coupling means (30K), which waveguide (30) is associated with the transmitting/receiving unit (40) and arranged in a positionally fixed manner with respect to the rotatable shaft (10), and at least one further optical 'multimode' waveguide (31), with associated coupling means (31K), which waveguide (31) is associated with the at least one optical waveguide (20) and arranged on the rotatable shaft (10) eccentrically to its axis (13). Here, the optical signals (LS, LS') can be transferred via the coupling means (30K, 31K) between the optical 'multimode' waveguides (30, 31). |
