An anterior and posterior segment frequency-domain optical coherence tomography system

Abstract

An anterior-posterior segment frequency-domain optical coherence tomography system. During the anterior / posterior segment imaging process, the FD-OCT system uses the same optical path hardware, and realizes detection light by internally adjusting the position of the specially designed scan conversion component in the sample arm. The transition of the scanning focus range from the fundus retina to the cornea. In the anterior / posterior segment imaging process of the present invention, the frequency-domain optical coherence tomography system adopts the same optical path hardware, and internally adjusts the position of the scanning conversion component specially designed in the sample arm to realize the scanning focus range of the detection light from the fundus retina to the The conversion at the cornea enables the anterior and posterior segment frequency-domain optical coherence tomography system to have the anterior segment imaging function without adding FD‑0CT system hardware. The present invention enables the posterior segment frequency-domain optical coherence tomography system to realize the imaging function of the anterior segment without adding an additional imaging objective lens, and simplifies the detection operation process and system structure.

Description

technical field [0001] The invention relates to an anterior and posterior segment imaging system. In particular, it relates to an anterior and posterior segment frequency-domain optical coherence tomography system. Background technique [0002] Optical coherence tomography (OCT) has been successfully used in the field of ophthalmic disease diagnosis since the 1990s due to its advantages of high resolution, high sensitivity, non-contact, nondestructive real-time live imaging, etc. [1] Afterwards, it has developed rapidly, and its technology has also developed from the time-domain OCT stage to the frequency-domain OCT stage; the technical field has also developed from tissue structure imaging to tissue function imaging. Frequency-domain OCT, including FD-OCT and SS-OCT, has become the first choice for early diagnosis of age-related macular degeneration, diabetic retinopathy, glaucoma and other fundus lesions in clinical ophthalmology due to its high resolution and rapid imagi...

AI Technical Summary

Problems solved by technology

This has just brought the following problems: 1, due to the need to replace or increase the imaging objective lens, it will inevitably bring operational complexity; 2, due to the need to replace or increase the imaging objective lens, the working distance will be increased, which will affect the work of the entire system structure. The distance range brings additional requirements; 3. In order to adapt to the conversion from the fundus imaging mode to the anterior segment imaging mode, the compensation range of the reference arm also brings additional requirements

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