Measuring Instrument for Determining the Tissue Alcohol Concentration
First Claim
1. A measuring instrument for determining the concentration of components in the body tissue by reflection spectroscopy, more particularly for determining the alcohol concentration in the body tissue, comprising:
- a diode laser with at least one laser diode; and
a waveguide structure, which has an external resonator, with a wavelength selective element, for each laser diode,wherein the waveguide structure is embodied and arranged such that the radiation generated by the laser diodes of the diode laser is respectively coupleable into the resonator associated with the respective laser diode and is decoupleable again after passing through the resonator.
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Accused Products
Abstract
A measuring instrument for determining the concentration of components in the body tissue by reflection spectroscopy is disclosed. In order, inter alia, to increase the functional reliability in the case of vibrations, the measuring instrument includes a diode laser with at least one laser diode and a waveguide structure, which has an external resonator, with a wavelength selective element, for each laser diode. In the process, the radiation generated by a laser diode is coupleable into the waveguide structure and the corresponding resonator and once again decoupleable from the resonator and the waveguide structure. Moreover, a corresponding method and a motor vehicle equipped therewith are disclosed.
11 Citations
13 Claims
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1. A measuring instrument for determining the concentration of components in the body tissue by reflection spectroscopy, more particularly for determining the alcohol concentration in the body tissue, comprising:
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a diode laser with at least one laser diode; and a waveguide structure, which has an external resonator, with a wavelength selective element, for each laser diode, wherein the waveguide structure is embodied and arranged such that the radiation generated by the laser diodes of the diode laser is respectively coupleable into the resonator associated with the respective laser diode and is decoupleable again after passing through the resonator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13)
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11. A method for determining the concentration of components in the body tissue by reflection spectroscopy, more particularly for determining the alcohol concentration in the body tissue, comprising:
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generating radiation by at least one laser diode, wherein the radiation wavelength is tuned in a step-wise or continuous fashion, more particularly in a range between ≧
2100 nm and ≦
2400 nm, for example by a resonator;radiating the radiation into the body tissue to be examined; measuring the intensity of the radiation reflected by the body tissue as a function of the radiation wavelength; and determining the concentration of at least one component of the body tissue from the obtained data.
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12. A motor vehicle having a measuring instrument for determining the concentration of components in the body tissue by reflection spectroscopy, more particularly for determining the alcohol concentration in the body tissue, the measuring element comprising:
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a diode laser with at least one laser diode; and a waveguide structure, which has an external resonator, with a wavelength selective element, for each laser diode, wherein the waveguide structure is embodied and arranged such that the radiation generated by the laser diodes of the diode laser is respectively coupleable into the resonator associated with the respective laser diode and is decoupleable again after passing through the resonator.
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Specification