Retinal blood flow measuring device based on light beam parallel scanning mode

Abstract

The invention relates to the field of medical optical detection and discloses a human eye retina blood flow measuring device based on a light beam parallel scanning mode. Blood vessel branches of different parts of the retina of the human eye and the total blood flow of the retina can be quantitatively detected, so that a detection light beam passes through the front focus of the human eye, and then the retina of the human eye is scanned in a manner of being parallel to the main optical axis or the radial axis of the human eye; the light beam parallel incidence mode can effectively increase the included angle between the detection light beam and the retinal vessel, so that the quantitative detection of the blood flow of vessel branches at different parts of the retina of the human eye is realized, and the accuracy of blood flow measurement results is improved. Meanwhile, a single-beam OCT system is used for measuring the blood flow of the retina of the human eye, so that the complexityof the OCT retina blood flow measuring device is reduced, the cost is greatly reduced, popularization and application of the retina blood flow measuring technology in medical clinic are promoted, andassistance is offered for diagnosis and research of ophthalmic diseases.

Description

technical field [0001] The invention relates to the field of medical optical detection, in particular to a retinal blood flow measurement device based on a beam parallel scanning mode, which is an ophthalmic optical detection device and has the function of detecting the blood flow of human retina. Background technique [0002] Optical coherence tomography (OCT) is a non-contact, non-invasive medical optical imaging technology. By detecting the scattered light inside the sample, OCT can perform high-resolution imaging of the structure of biological samples with a resolution on the order of microns. In addition to providing tissue morphological information, OCT can also detect the Doppler frequency shift of light scattered from biological tissue, thereby analyzing and measuring the blood flow inside the tissue. [0003] In Doppler OCT, the flowing blood produces a Doppler frequency shift (Δf) to the scattered light, [0004] Δf=-(2nVcosα) / λ 0 (1) [0005] Where n is the r...

AI Technical Summary

Problems solved by technology

Because this technology uses two sets of OCT systems, the cost is high, the adjustment is complicated, it is not conducive to clinical application, and it is difficult to be popularized

In addition, this technique is not perfect in theory. In the incident direction of the beam, the detection light and the blood vessel to be measured are required to be close to perpendicular, and the angle between the scanning direction and the blood vessel needs to be detected as an auxiliary parameter.

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