OCT-based ophthalmological measuring system

摘要

An ophthalmological measuring system for determining distances and/or for tomographic imaging of ocular structures, based on an OCT method. The measuring system includes a light source with a spectral centroid (λ), an interferometric measuring device, a scanner system, which in addition to the lateral deflection of the sample beam also has axial modulations with a frequency (f) in the sample arm, and a control and evaluation unit. The scanner performs a lateral, two-dimensional deflection of the sample beam with the aid of one or even two separate mirror elements and can in particular have axial modulation amplitudes zM>>λ/2. The system can also be used for scanner systems in other fields that use an OCT method, in particular a swept-source OCT method.

主权项

1. An OCT-based ophthalmological measuring system, comprising:
a tunable light source emitting light with a spectral centroid λ; an interferometric measuring arrangement; a scanner system which, in addition to lateral deflection of a sample beam, also causes axial modulations with a frequency fin a sample arm; and a control and evaluation unit; wherein the measuring system comprises a swept-source OCT system and a tuning speed dλ/dt of the tunable light source is adapted to the maximum measuring depth z and a frequency f of the axial modulation of the scanner system.