Fundus camera with auto focus

Abstract

The present disclosure relates to an autofocus fundus camera, which includes: a light source for emitting a first light beam and a second light beam to the fundus of the eye, the first light beam is a light beam insensitive to the eye; a lens assembly; an imaging element for Receive the first light beam and the second light beam passing through the lens assembly; a recording module, which is used to record the first focus position when the first light beam is focused on the imaging element; a processing module, which is based on the wavelength of the first light beam and the diopter of the lens assembly Obtain the diopter of the eyeball with the first focus position, and obtain the second focus position after the second beam passes through the lens assembly based on the wavelength of the second light beam, the diopter of the eyeball and the diopter of the lens assembly; and the driving mechanism, which is based on the second focus The position adjusts the relative position between the lens assembly and the imaging element. According to the present disclosure, the fundus can be accurately auto-focused when the fundus image is collected, and the light stimulation to the eyes can be effectively reduced during the focusing process.

Description

technical field [0001] The present disclosure relates to an autofocus fundus camera. Background technique [0002] With the development of ophthalmic medical care, doctors can diagnose whether the subject suffers from fundus diseases by observing the fundus such as the retina, optic disc, and blood vessel distribution. At present, in clinical practice, doctors and the like usually use a fundus camera to collect fundus images of human eyes to observe the fundus. [0003] The fundus camera can emit a beam of light to the fundus through the pupil, and receive the reflected beam to image the fundus. In the existing fundus cameras, a single visible light is usually used to directly collect fundus images. Visible light is good for lighting, so it can be used to collect images of the dark fundus. However, this single visible light fundus camera still has many shortcomings. . For example, since the eyes are more sensitive to visible light, when using visible light to collect fund...

AI Technical Summary

Problems solved by technology

In the existing fundus cameras, a single visible light is usually used to directly collect fundus images. Visible light is good for lighting, so it can be used to collect images of the dark fundus. However, this single visible light fundus camera still has many shortcomings.

For example, because the eyes are more sensitive to visible light, when using visible light to collect fundus images and focus on the fundus, the eyes are easily stimulated by light, causing the pupils to shrink in a short time, and the focusing time is too short to make it difficult to accurately focus on the fundus

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