Method and device for examining a biological tissue by analysing fluorescence response to illumination and for treating the tissue
First Claim
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1. A method for examining biological tissue, wherein the method comprises:
- illuminating the biological tissue to be examined by illumination radiation emitted by a light source along an illumination optical path to cause the biological tissue to emit fluorescence radiation;
filtering the emitted fluorescence radiation by a filter positioned in an observation optical path to generate an image of the biological tissue based on the filtered fluorescence radiation, which image is capable of at least one of (i) being observed and (ii) being recorded and optically displayed;
the filter being a double bandpass filter comprising a combination of a longpass filter and a notch filter and having a first passband within a wavelength range of from 460 nm to 560 nm and a second passband within a wavelength range of from 600 nm to 685 nm, the first passband and the second passband being apart from one another by at least 60 nm.
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Abstract
Method, and the associated device, for examining a biological tissue, in particular dental tissue or tooth enamel of one or several teeth, the method including the steps of taking into account at least the fluorescence of the tissue detected in a first wavelength range and the fluorescence of the tissue detected in a second wavelength range. The device can be a surgery microscope with one or several filters. The filters can be swiveled into or out the Illumination beam path or the optical path of the light source of the device.
50 Citations
29 Claims
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1. A method for examining biological tissue, wherein the method comprises:
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illuminating the biological tissue to be examined by illumination radiation emitted by a light source along an illumination optical path to cause the biological tissue to emit fluorescence radiation; filtering the emitted fluorescence radiation by a filter positioned in an observation optical path to generate an image of the biological tissue based on the filtered fluorescence radiation, which image is capable of at least one of (i) being observed and (ii) being recorded and optically displayed; the filter being a double bandpass filter comprising a combination of a longpass filter and a notch filter and having a first passband within a wavelength range of from 460 nm to 560 nm and a second passband within a wavelength range of from 600 nm to 685 nm, the first passband and the second passband being apart from one another by at least 60 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for examining biological tissue, wherein the apparatus comprises:
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a light source which provides illumination radiation for illuminating an object; an illumination optical path from the light source to the object; at least one of an ocular for viewing an image of the illuminated object and a camera for recording an image of the illuminated object; an observation optical path from the object to the at least one of an ocular and a camera; a filter positioned in the observation optical path, which filter is a double bandpass filter comprising a combination of a longpass filter and a notch filter and having a first passband within a wavelength range of from 460 nm to 560 nm and a second passband within a wavelength range of from 600 nm to 685 nm, the first passband and the second passband being apart from one another by at least 60 nm. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification