Interferometric Measuring Instrument for Taking Optical Measurements on Skin Structures
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Abstract
An interferometric measuring instrument for taking optical measurements on skin structures, having a beam splitter for splitting an input beam, emitted by a light source, into an object beam and a reference beam; having an object branch via which the object beam is directed to the skin, and the object beam, scattered back from the skin structures, is returned; having a reference branch via which the reference beam is directed to a reference and returned from it; and having a detector device for picking up the recombined and interfering radiation of the back-scatted object beam and of the returned reference beam and for evaluating the intensity modulation obtained due to the interference. The following measures contribute significantly to a reliable and rapid optical measurement, e.g., of the blood-sugar concentration: In order to scatter back a portion of the object beam directed into the skin, an implant having a front side facing the incident object beam and a back side facing away from it is introduced into the skin, the implant having a refractive index different from the surrounding skin substance.
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Citations
17 Claims
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1-8. -8. (canceled)
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9. An interferometric measuring instrument for taking optical measurements on skin structures of skin, comprising:
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a beam splitter for splitting an input beam, emitted by a light source, into an object beam and a reference beam; an object branch via which the object beam is directed to the skin, and the object beam, scattered back from the skin structures, is returned; a reference branch via which the reference beam is directed to a reference and returned from the reference; and a detector device for picking up recombined and interfering radiation of the back-scattered object beam and of the returned reference beam and for evaluating an intensity modulation obtained due to the interference; and an implant introduced into the skin for scattering back a portion of the object beam directed into the skin, the implant having a front side facing the incident object beam and a back side facing away from the incident object beam, the implant having a refractive index different from a surrounding skin substance. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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15. An interferometric method for taking optical measurements on skin structures of skin, comprising:
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splitting an input beam coming from a light source into a reference beam guided to a reference and an object beam guided to the skin; bringing to interference the reference beam and the object beam scattered back from the reference and from the skin; detecting and evaluating an intensity modulation obtained due to the interference for determining a property of the skin structures; introducing an implant that has a refractive index different from a surrounding skin substance into the skin; and evaluating the intensity modulation brought about by light scattered back at at least one boundary surface of the implant relative to tissue fluid for determining the property of the skin structures. - View Dependent Claims (17)
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Specification