Eye ground camera imaging system based on liquid lens focusing

Abstract

The invention discloses an eye ground camera imaging system based on liquid lens focusing. The system comprises an imaging subsystem and an illumination subsystem, the imaging subsystem comprises an eye objective lens, an imaging objective lens, a receiving device and a displaying device which are arranged in sequence, the illumination subsystem comprises a light source, a uniform light mirror and an eye objective lens, the illumination subsystem and the imaging subsystem are connected together through a semi-reflecting semi-transmitting lens, the eye ground camera imaging system further comprises a liquid varifocus lens, the liquid varifocus lens is arranged between the eye objective lenses and an image surface of the imaging subsystem, the liquid varifocus lens is matched with a corresponding driving device, and the receiving device is a charge coupled device (CCD). According to the eye ground camera imaging system based on liquid lens focusing, the liquid varifocus lens is introduced to the imaging system, input voltage or mechanical force that is exerted on a lens body is changed so that surface curvature of the liquid lens can be changed, clear imaging of human eyes with different visions can be achieved, the mechanical structure is simple, requirements of proficiency of operators are low, and operation by a professional doctor or nurse is not required.

Description

technical field [0001] The invention relates to the technical field of medical fundus imaging, in particular to a liquid lens-based focusing fundus camera imaging system. Background technique [0002] The retina of the human eye, also known as the fundus, is a thin film with a highly complex structure and an important part of the human eye. The position of the retina in the eye is equivalent to the receiver of the imaging system. There are a large number of blood vessels distributed on the retina of the eye. Observing the vascular veins on the retina of the human eye can provide an important basis for doctors to diagnose many eye diseases, and even many diseases in the whole body. For example, diabetic retinopathy is the main cause of blindness in diabetic patients and has become one of the four major lesions that cause blindness in patients. Diabetes is becoming a global epidemic. There are 347 million people with diabetes worldwide. It is predicted that in the next 10 ye...

AI Technical Summary

Problems solved by technology

Most of the fundus cameras developed in China have the following problems: the equipment requires professional doctors or nurses to operate, the equipment cost and medical expenses are high, and drugs are needed to dilate the human eye, and mydriasis has certain side effects on the human body

These all severely limit the use of fundus cameras

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