Portable variable camber liquid lens fundus camera

Abstract

The invention discloses a fundus camera for photographing retinas of human eyes and particularly relates to a portable variable camber liquid lens fundus camera. The portable variable camber liquid lens fundus camera comprises an eye positioning system, an imaging system, an illuminating system, an image acquisition unit, a control circuit and an intelligent remote control terminal, wherein the imaging system comprises an eyepiece lens group, an imaging objective lens group, a zoom liquid lens and the image acquisition unit, an intermediary image of a fundus image is formed by an eyepiece lens, the intermediary image is subjected to zooming through the liquid lens and finally imaged on a sensor target surface of the image acquisition unit by an imaging objective lens to be real-timely displayed through a screen, the illuminating system comprises a ring illuminator, a uniform light lens of a front group and the eyepiece lens of a back group, the illuminating system and the imaging system share the eyepiece lens, the ring illuminator is directly imaged at a position of an eye pupil by the illuminating system to pass through the eyepiece lens of an imaging light path and then enter a polarizing beam splitter (PBS), and the illuminating system and the imaging system are coaxial. Besides, with a wireless fidelity (Wi-Fi) connecting function, the fundus camera can be remotely operated through the intelligent remote control terminal.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to a portable fundus camera with a variable curvature liquid lens, which is used for taking pictures of the retina of the human eye in the range of visible light and near-infrared. Background technique [0002] The fundus camera is a medical testing instrument commonly used in clinical screening of fundus diseases, such as screening retinal photos to detect diabetes, retinopathy of prematurity, glaucoma, age-related macular degeneration, etc. The sooner these diseases are detected, the more conducive to the clinical treatment of these diseases. [0003] At present, the widely used fundus cameras adopt the mechanical movement method of moving the lens group or the image plane to adjust the diopter. The structure of this focusing method is relatively complicated, and the tester needs to observe the image in real time and adjust the definition, and the operation is ...

AI Technical Summary

Problems solved by technology

[0003] At present, the widely used fundus cameras adopt the mechanical movement method of moving the lens group or the image plane to adjust the diopter. The structure of this focusing method is relatively complicated, and the tester needs to observe the image in real time and adjust the definition, and the operation is relatively cumbersome.

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