Three-dimensional imaging device for retina

Abstract

The invention discloses a three-dimensional imaging device for a retina. The device consists of a light source component, an interference arm component, a two-dimensional scanning component, a field lens component, a confocal signal detection component and an interference signal detection component. The three-dimensional imaging device for the retina finishes scanning on the retina of a human eye by using the two-dimensional scanning component, extracts a surface image of the retina by using the confocal signal detection component and depth information of the retina by using the interference signal detection component, and jointly finishes the reconstruction of a three-dimension image of the retina through a confocal signal and an interference signal; the system is compact by adopting the design of optical fiber access and an optical fiber coupler; the influence of curvature of field and aberration in the imaging process is reduced through the design of a field lens so as to acquire a large-field-of-view three-dimensional image of the retina of the human eye; and the three-dimensional imaging device for the retina which is compactly designed and is high in imaging resolution and large in imaging field of view is realized, so that the imaging effect of the traditional fundus imaging instrument is greatly improved.

Description

technical field [0001] The invention relates to an ophthalmic imaging device, in particular to a three-dimensional retinal imaging device, which can scan and image different areas and thicknesses of the retina within a large field of view, reconstruct the three-dimensional retinal image and output the observation results via video, Provide scientific reference for the diagnosis of retinal diseases. Background technique [0002] Confocal scanning imaging and optical coherence tomography have been widely and maturely applied in the field of biological histology imaging (Webb RH, Hughes GW. Scanning Laser Ophthalmoscope. Biomedical Engineering, IEEE Transactions on.1981, BME-28 (7 ): 488-92.); A.F.Fercher et al earlier proposed to measure the length of the eye axis by interferometric imaging (A.F.Fercher et.Al "Eye-length measurement by interferometry with partially coherent light", Optics Letters.13, 186 -188 (1998)), and then David Huang et al. did more research on the devel...

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Problems solved by technology

[0008] 1) Overcoming the limitation that traditional fundus cameras cannot obtain retinal tomographic images; 2) Overcoming the limitation that traditional fundus OCT cannot obtain high-resolution retinal surface images; 3) Overcoming the problem that traditional fundus cameras can only take single retinal images; 4) Overcoming The imaging field of view of the traditional fundus OCT imaging system is too small; the present invention proposes a three-dimensional retinal imaging device, which can not only obtain high-resolution fundus surface scanning images of the human retina, but also obtain retinal tomographic images, and realize 45 Wide field of view fundus 3D imaging in ° angle range

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