Ophthalmology measurement system based on carrier frequency loading device

By introducing a loading frequency device and an optical path switching scanning device in the ophthalmic measurement system, the problems of limited detection depth, slow imaging speed and low measurement accuracy in the prior art are solved, and the rapid and accurate measurement of multiple optical parameters of the human eye are achieved, and the detection range and stability of the system are improved.

CN119632501AActive Publication Date: 2025-03-18SHENZHEN CERTAINN TECH CO LTD
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Patent Information

Application Number
CN202411883689.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-03-18
Estimated Expiration
2044-12-19

AI Technical Summary

Technical Problem

When measuring the axial length of the eye, corneal curvature and lens thickness, the detection depth is limited, the imaging speed is slow, and the measurement accuracy is not high, so it is impossible to achieve the need to quickly and accurately obtain multiple optical parameters of the human eye.

Method used

The ophthalmic measurement system based on the loading frequency device is adopted, combined with the OCT imaging module and the optical path switching scanning device, through the loading frequency device, the optical path or phase change between adjacent OCT scans A-Scans is changed and the optical path or phase change between adjacent OCT scans is kept constant, and the Doppler shift is introduced to achieve deepening of the detection depth.

Benefits of technology

It realizes efficient and accurate imaging of different parts of the eye, improves the detection range and stability of the OCT system, ensures the accuracy of positioning, does not affect the system signal-to-noise ratio, and can quickly and accurately measure key ophthalmic parameters to meet the needs of clinical diagnosis.

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Abstract

The invention provides an ophthalmology measurement system based on a carrier frequency loading device, which comprises an OCT light source, a reference arm, a sample arm module, an optical fiber coupler and a detector, and is characterized in that the sample arm module is integrated with an optical path switching scanning device and can reflect detection light to a posterior segment or anterior segment optical path. The optical path is dynamically adjusted by introducing a carrier frequency adding device, the A-Scan optical path or phase change is kept constant, Doppler frequency shift is achieved, and the detection depth is enhanced without losing resolution. The system can quickly switch imaging focuses to adapt to eyes with different eyesight, and refraction compensation is carried out to obtain high-resolution OCT (Optical Coherence Tomography) images. In addition, the system can accurately measure key parameters such as corneal curvature, thickness, anterior chamber depth, crystalline lens thickness and the like, and the diagnosis speed is effectively improved. According to the invention, while the imaging quality is ensured, the limitations on detection depth, imaging speed and precision in the prior art are solved.
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