Method and device for detecting the surface structure and properties of a probe
First Claim
1. A method for detecting the surface structure and composition of a sample by means of a scanning unit wherein the sample and the scanning unit are moved in relation to one another,whereina sample surface is irradiated line-by-line using a laser beam emitted from the scanning unit, having predefined laser beam diameter in a step width corresponding to the laser beam diameter, and the reflected laser beam is detected and analyzed coaxially in relation to the emitted laser beam, the laser beam reflected from the sample surface is detected and a digital image of the topography of the sample surface and the intensity of the reflected laser beam is generated from deviations of the reflected laser beam from the emitted laser beam and a run time, which is dependent on the distance of the scanning unit from the sample surface, of the laser beam, which is emitted from the scanning unit and reflected from the sample surface, is detected and analyzed to prepare a distance image corresponding to the topography of the sample surface.
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Accused Products
Abstract
A method for detecting the surface structure and composition of a sample by means of a scanning unit, in particular for detecting traces, which are induced by contact of the skin of the human body on the surface of an object or absorbed by means of a trace carrier. The sample and the scanning unit are moved in relation to one another. The sample surface is irradiated line-by-line using a light beam or laser beam emitted from the scanning unit. The light beam or laser beam reflected from the sample surface is detected, and a digital image of the topography of the sample surface and the intensity of the reflected light beam or laser beam is generated from deviations of the reflected light beam or laser beam from the emitted light beam or laser beam to illustrate the composition of the sample surface.
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Citations
20 Claims
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1. A method for detecting the surface structure and composition of a sample by means of a scanning unit wherein the sample and the scanning unit are moved in relation to one another,
wherein a sample surface is irradiated line-by-line using a laser beam emitted from the scanning unit, having predefined laser beam diameter in a step width corresponding to the laser beam diameter, and the reflected laser beam is detected and analyzed coaxially in relation to the emitted laser beam, the laser beam reflected from the sample surface is detected and a digital image of the topography of the sample surface and the intensity of the reflected laser beam is generated from deviations of the reflected laser beam from the emitted laser beam and a run time, which is dependent on the distance of the scanning unit from the sample surface, of the laser beam, which is emitted from the scanning unit and reflected from the sample surface, is detected and analyzed to prepare a distance image corresponding to the topography of the sample surface.
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10. A device for detecting the surface structure and composition of a sample, comprising:
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a sample receptacle, a scanning unit comprising a laser light source for emitting a laser beam having a wavelength range of a known or previously ascertained significant absorption peak of a chemical substance or for ascertaining the significant absorption peak, a laser beam is tuned in a range of the infrared spectrum, a receiver for receiving laser beams transmitted or reflected from a sample surface, and an X-Y axis deflection unit, which scans the sample surface using the laser beams emitted from the laser source, and. an analysis unit comprising a first computer unit for generating a topographic distance image of the sample surface having the chemical substance, the image being generated using a run time, which is dependent on the distance of the scanning unit from the sample surface, of the laser beam, which is emitted from the scanning unit and reflected from the sample surface, is detected and analyzed to prepare a distance image corresponding to the topography of the sample surface, a second computer unit for generating an infrared image, which depicts an intensity of the reflected laser beams, of the sample surface having the chemical substance, and a central computer unit which is bidirectionally connected to a data memory, an image display unit or display screen, and the first and second computer unit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification