Fundus imaging optical system

A technology of imaging optics and imaging light path, which is applied in ophthalmoscope, medical science, equipment for testing eyes, etc. It can solve problems such as affecting photography, unobtainable, weak light source, etc., to save device cost, improve accuracy and reliability Effect

Pending Publication Date: 2022-06-28
SHENZHEN CERTAINN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because if the light is too strong, the pupil of the tested eye will shrink, which will affect the photo taking
The infrared preview light source is weak. If you judge whether the fundus image is adjusted to the clearest through the blurred infrared preview, it will often lead to misjudgment, and it will not be possible to get the clearest fundus image when taking pictures with flash
[0005] In the prior art, there is a lack of an efficient and economical auxiliary adjustment imaging method, and how to conveniently and objectively evaluate whether the adjustment imaging optical path is the clearest

Method used

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  • Fundus imaging optical system
  • Fundus imaging optical system
  • Fundus imaging optical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like figure 1 As shown in the figure, the lens shown in the figure is only a schematic diagram, and it can be formed in the form of a glued part or a mirror group, which belongs to common knowledge. The first probe 10 of the fundus imaging optical system includes: a fundus illumination light path, a fundus imaging light path, a fixation light path, and an auxiliary adjustment refractive light path; they are described as follows:

[0041] 1. Fundus illumination light path

[0042] The fundus illumination light path is used to provide fundus illumination with infrared light and white light flash to illuminate the fundus, so that the fundus imaging light path can realize infrared preview imaging of the fundus and flash photography imaging.

[0043] The fundus illumination light path includes the illumination light output light path 140 , the aperture mirror 1401 and the eyepiece objective lens 1201 . The light source (not shown) in the fundus illumination light path emit...

Embodiment 2

[0073] like image 3 As shown, the probe 20 also includes: a fundus illumination light path, a fundus imaging light path, a fixation light path, an auxiliary adjusting refractive light path, and an iris split image imaging light path. Only the parts different from those in Embodiment 1 will be described in detail below, and other parts will be referred to the descriptions in Embodiment 1.

[0074] 1. Fundus illumination light path

[0075] The fundus illumination light path includes an illumination light source 2401 , an illumination light filter 2403 and an eyepiece objective lens 1201 . The illumination light source 2401 emits light, which is transmitted through the light-emitting filter 2403 and the eyepiece objective lens 1201, and then passes through the human eye E to illuminate the fundus Er. Among them, the middle of the illuminating light filter 2403 has a second through hole, and the second through hole is provided with a second aperture 1203; the illumination ligh...

Embodiment 3

[0087] like Figure 4 As shown, the third probe 30 of the fundus imaging optical system also includes: a fundus illumination light path, a fundus imaging light path, a fixation light path, an auxiliary adjusting refractive light path, and an iris split imaging light path. Only the parts different from those in Embodiment 1 will be described in detail below, and other parts will be referred to the descriptions in Embodiment 1.

[0088] 1. Auxiliary adjustment of refractive path

[0089] The auxiliary adjustment and refraction path includes auxiliary adjustment and refraction light source 3301, pinhole aperture 3303, auxiliary adjustment and refraction path first lens 3304, double aperture aperture 3305, auxiliary auxiliary adjustment refraction path second lens 3306, fixed-refractive beam splitter 1703, The eye objective lens 1201 , the first diaphragm 1203 , the diopter lens 1204 , the imaging lens 1205 , the injection beam splitter 1206 , and the imaging device 1207 .

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Abstract

The invention provides a fundus imaging optical system, which is used for carrying out fundus imaging on a tested eye, and comprises a fundus illumination light path for providing a light source to illuminate the fundus of the tested eye; the fundus imaging light path comprises a refraction adjusting mirror and is used for carrying out fundus imaging on the tested eye; the fixation light path is used for providing a fixation mark so as to fix the vision of the tested eye; and the auxiliary refraction adjusting optical path and the fundus imaging optical path share the refraction adjusting lens, so that the refraction adjusting accuracy and reliability are improved. The auxiliary refraction adjusting optical path and the fundus imaging optical path share the refraction adjusting lens, so that a complex linkage adjusting mechanism is omitted, the accuracy and reliability of refraction adjusting alignment are improved, the device cost is saved, and the purposes of economy, high efficiency, accuracy and convenience are achieved. Furthermore, fundus imaging of the tested eye is realized by combining iris split image imaging and fundus illumination technologies, and whether a flexion adjustment imaging light path of the fundus imaging optical system is adjusted to be clearest according to different diopters of the tested eye is objectively evaluated, so that a clearest fundus color photo is obtained.

Description

technical field [0001] The invention relates to the technical field of fundus imaging, in particular to a fundus imaging optical system. Background technique [0002] Fundus cameras belong to the field of medical imaging, and are used to obtain retinal images of human eyes, so that medical personnel can examine fundus diseases or assist medical personnel in judging the conditions of other organs. Because the blood vessels of the fundus are the only blood vessels that can be directly observed through the body surface, medical personnel can use the fundus camera to check whether the optic nerve, retina, choroid and refractive media of the fundus have lesions, and can also use the fundus camera. Disease diagnosis and condition judgment, such as cerebral infarction, cerebral hemorrhage, cerebral arteriosclerosis, brain tumor, diabetes, kidney disease, hypertension, retinopathy of prematurity, glaucoma, age-related macular degeneration, etc. by screening retinal photos. The soon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/12A61B3/14
CPCA61B3/125A61B3/14
Inventor 蔡守东吴蕾
Owner SHENZHEN CERTAINN TECH CO LTD
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