초록 ▼

The invention relates to an optical measuring device for measuring physical magnitudes such as position, speed, acceleration, force, pressure, elongation, temperature, etc., comprising at least one optical fiber for conducting light between an electronic unit and a transducer forming an optical modu

The invention relates to an optical measuring device for measuring physical magnitudes such as position, speed, acceleration, force, pressure, elongation, temperature, etc., comprising at least one optical fiber for conducting light between an electronic unit and a transducer forming an optical modulator which is directly or indirectly influenced by the quantity being measured and, in dependence thereon, modulates the light emitted to the transducer. The transducer contains at least one optical filter having spectrally varying absorbing and/or transmitting and/or reflecting characteristics within the spectra of the emitted light. The light filter generates one or more stabilizing signals for the fiber optic and optoelectronics, and possibly one or more measurement signals within one or more wavelength ranges.

대표청구항 ▼

Optical measuring apparatus for measuring physical magnitudes, comprising: electronic circuit means including at least one light source for emitting light and means for processing measuring signals; a transducer for receiving said emitted light and including an optical modulator responsive to optica

Optical measuring apparatus for measuring physical magnitudes, comprising: electronic circuit means including at least one light source for emitting light and means for processing measuring signals; a transducer for receiving said emitted light and including an optical modulator responsive to optical signals representing the measured physical magnitudes for modulating the light emitted from said at least one light source; at least one optical fiber for conducting light between said at least one light source and said transducer; said transducer further including at least one optical filter having a spectrally-varying absorbing, transmitting or reflecting characteristic within the spectra of the light emitted by said at least one light source, said at least one optical filter being positioned in the path of the light emitted from the transducer to generate at least one optical stabilization signal for stabilizing the optical signals in said at least one optical fiber and said means for processing measuring signals, and said at least one optical filter generating at least one optical measuring signal, said at least one fiber end in said transducer including an interference filter positioned adjacent thereto for generating a light signal in one wavelength range less dependent on the measured physical magnitude than the light within another, non-identical wavelength range of the light emanating from said transducer, the optical wavelength of said interference filter is changed by mechanical stresses induced in the interference layers thereof; and said means for processing including means for detecting said at least one optical measuring signal.