Ophthalmologic OCT (Optical Coherence Tomography) system and ophthalmologic OCT imaging method

Abstract

The invention discloses an ophthalmologic OCT (Optical Coherence Tomography) system and an ophthalmologic OCT imaging method. The OCT system comprises a light source, a coupler, a reference arm, a sample arm, a spectrograph and a computer processing unit, wherein the sample arm comprises a polarization controller, a sample arm focusing lens, a two-dimensional galvanometer unit, a diopter adjustment lens, an eye and object lens, a light path switching galvanometer and a reflector unit; the light path switching galvanometer comprises at least two turn angles; emergent light from a sample arm focusing lens is incident into the light path switching galvanometer and reflected by the light path switching galvanometer; the light path switching galvanometer controls the emergent angle of the emergent light through different turn angles, so that the emergent light can be incident into the two-dimensional galvanometer unit through different light paths; and the different light paths comprise a light path in which the light is directly incident into the two-dimensional galvanometer unit from the light path switching galvanometer and a light path in which the light is reflected through the reflector unit and incident into the two-dimensional galvanometer unit. According to the ophthalmologic OCT system and the ophthalmologic OCT imaging method, large-range fundus OCT scanning can be finished.

Description

technical field [0001] The present invention relates to optical coherence tomography (English: Optical Coherence Tomography, abbreviation: OCT) technology, in particular to an ophthalmic OCT system and an ophthalmic OCT imaging method. Background technique [0002] In the traditional time-domain OCT system, the reference arm vibrates to achieve a certain depth range detection, but the depth is limited. The depth position range allows the fiber optic collimator in the reference arm or the sample arm to adjust the optical path forward and backward. However, the front and back of the fiber optic collimator are often driven by motors, which cannot achieve fast switching of the detection range. In the traditional frequency-domain OCT system, the reference arm is fixed, and the optical distance is adjusted by the fiber optic collimator of the sample arm. The front and rear of the fiber collimator are also driven by motors, which cannot realize fast switching of the detection range...

AI Technical Summary

Problems solved by technology

Because the human eyeballs will unconsciously move slightly, and this movement can not be ignored relative to the forward and backward movement of the motor, and the OCT system in both the time domain and the frequency domain cannot achieve fast and large-scale fundus scanning imaging

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