METHOD FOR MONITORING TIME-DEPENDENT PROPERTIES OF LIGHT DURING SCANNING SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY

摘要

The invention relates to a method for monitoring time-dependent properties of light during scanning swept-source optical coherence tomography, having the steps:a. generating laser light having wavelengths that change on a time-dependent basis and a predetermined sweep duration;b. splitting the laser light into sample light, reference light, and monitor light;c. routing the reference light into a reference arm of an OCT interferometer;d. routing the monitor light into a monitor device, which generates at least one optical monitor signal representing at least one time-dependent property of the monitor light;e. generating at least one electric monitor signal from the at least one optical monitor signal with a light detector;f. illuminating in a point-shaped manner a sample with sample light, wherein the illumination point is guided on the surface of the sample along a predetermined trajectory;g. superimposing the light scattered by the sample with the reference light emerging from the reference arm on a light detector to generate an electric OCT signal;characterized in thath. the at least one electric monitor signal and the electric OCT signal are AD-converted in alternating sequence, in each case equidistantly in time, by means of which a single digital data stream comprising time segments each having only one of the AD-converted signals is formed.