Method and Device for Generating Multispectral or Hyperspectral Light, for Hyperspectral Imaging and/or for Distance Measurement and/or 2D or 3D Profile Measurement of an Object by Means of Spectrometry

摘要

The invention relates to methods and to devices for generating multispectral illuminating light having an addressable spectrum, for adaptive multispectral imaging and for capturing structural and/or topographical information of an object or of the distance to an object. The illuminating device comprises a multispectral light source and a modulator for temporal modulation of the individual spectral components of the multispectral light source having modulation frequencies. The multispectral light source comprises at least one light source having a continuous, quasi-continuous, or frequency comb spectrum and wavelength-dispersive means, or an assembly or array of monochromatic or quasi-monochromatic light sources having emission wavelengths or emission wavelength bands which are different from one another in each case. The modulator comprises at least one electrically controllable three-dimensional light modulator, or a plurality of electronic control modules assigned to the individual monochromatic or quasi-monochromatic light sources.

主权项

1. An illuminating device for generating multispectral or hyperspectral illuminating light having an addressable spectrum, the illuminating device comprising:
a multispectral light source; a modulation device which is configured to time-modulate individual spectral components of the multispectral light source with mutually different modulation frequencies, modulation frequency ranges, or modulation sequences, wherein (i) the multispectral light source comprises at least one light source having a continuous spectrum, a quasi-continuous spectrum, or frequency comb spectrum, and wavelength-dispersive element for spectral splitting of the light emitted by the light source in a plurality of spatially separate spectral components each having different wavelengths or wavelength bands, and the modulation device comprises at least one electrically controllable spatial light modulator, wherein the modulation device is configured to time-modulate the individual spectral components in terms of time; or (ii) the multispectral light source comprises at least an assembly or array of monochromatic or quasi-monochromatic light sources for emitting light having emission wavelengths, or emission wavelength bands, differing from one another, and
the modulation device comprises a plurality of electronic control modules assigned to the individual monochromatic or quasi-monochromatic light sources, and wherein the modulation device is configured to time-modulate the light emitted by the respective monochromatic or quasi-monochromatic light source; and wherein the illuminating device further comprises optical elements, wherein the optical elements are configured to combine the individual, modulated spectral components of the multispectral light source such that they substantially spatially overlap each other so as to form the multispectral or hyperspectral illuminating light having an addressable spectrum.