Mydriasis-free fundus camera used in conjunction with smart phone

Abstract

The invention provides a mydriasis-free fundus camera used in conjunction with a smart phone. The camera comprises an optical path system, the smart phone, a control module and a mobile phone adapterenabling the optical path system to cooperate with the smart phone. The optical path system comprises lighting sources, a lighting objective lens group, an imaging objective lens group, a photoconverter and an ocular lens group. The lighting sources are characterized in that near infrared / visible light LEDs symmetrically rotate around the center and are arrayed in an alternating manner. The smartphone is used for shooting images which are reflected by human eyes and pass through the lighting objective lens group, the imaging objective lens group, the photoconverter and ocular lenses. The control module is used for controlling near infrared LED lamps of the lighting sources to emit light when the imaging objective lens group is adjusted to focus the fundus camera and for controlling visible light LED lamps of the lighting sources to emit light when human eyes are shot. During focusing, the near infrared LED lamps are adopted to illuminate so as not to simulate human eyes. Therefore, pupils of human eyes do not contract. During shooting, the visible light LED lamps are adopted and the photoconverter is utilized for enhancement. Therefore, human eye fundus images can be shot by thesmart phone in a mydriasis-free manner.

Description

technical field [0001] The invention relates to a portable fundus camera, in particular to a non-mydriatic fundus camera used in combination with a smart phone, and belongs to the technical field of ophthalmic medical equipment. Background technique [0002] The fundus image obtained by the fundus camera is intuitive, easy to understand, and has a high magnification, which can clearly display the details of the fundus tissue structure. It is widely used in the screening and diagnosis of fundus diseases, such as diabetic retinopathy, glaucoma, age-related macular degeneration and other diseases. [0003] Smart phones have the characteristics of image acquisition, information processing, wireless Internet access, third-party software installation, and strong scalability, and have gradually been deeply and widely used in people's daily life. Combining the fundus camera with a smart phone can realize the mobility, portability and digitization of the fundus camera. After the sma...

AI Technical Summary

Problems solved by technology

[0005] None of the above-mentioned fundus cameras that can be used in combination with smartphones has the function of taking fundus images without mydriasis, and all of them need mydriasis to use

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