Coherence gating and focal plane coincided and dynamic focusing type retina full-field OCT (optical coherence tomography) imager

A technology of dynamic focusing and coherence gate, which is applied in the fields of eye testing equipment, medical science, diagnosis, etc., and can solve the problem of not being able to obtain retinal high Δx images

Active Publication Date: 2019-03-19
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, its combination with dynamic focusing technology has not been seen, let alone the characteristic that the coherence gate and the focal plane al

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  • Coherence gating and focal plane coincided and dynamic focusing type retina full-field OCT (optical coherence tomography) imager
  • Coherence gating and focal plane coincided and dynamic focusing type retina full-field OCT (optical coherence tomography) imager
  • Coherence gating and focal plane coincided and dynamic focusing type retina full-field OCT (optical coherence tomography) imager

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown, the present invention proposes a retinal full-field OCT imager with coherence gate and focal plane overlapping and dynamic focusing, including: a broadband light source 1, a collimating mirror 2, a first lens 3, a beam splitter 4, and a dichroic Mirror 5, second lens 6, Badal mechanism 7, third lens 10, water column 11, reference mirror 12, driver 13, translation stage 14, dispersion compensator 15, fourth lens 16, fifth lens 17, detector 18, Bottom plate 19 , electric translation stage 20 , visual mark 21 , sixth lens 22 and seventh lens 23 .

[0031] After the light beam emitted by the broadband light source 1 is collimated by the collimator 2, it enters the beam splitter 4 through the first lens 3, the part reflected by the beam splitter 4 is the sample beam, and the transmitted part is the reference beam....

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Abstract

The invention discloses a coherence gating and focal plane coincided and dynamic focusing type retina full-field OCT (optical coherence tomography) imager, which comprises a broadband light source, acollimating lens, a first lens, a spectroscope, a dichroscope, a second lens, a Badal mechanism, a third lens, a water column, a reference lens, a driver, a dispersion compensator, a fourth lens, a fifth lens, a detector, an electric translation platform, a sighting mark and the like. By the Badal mechanism formed by the first lens, the spectroscope, the dichroscope and the second lens, especiallyby the electric translation platform, the spectroscope and the dichroscope are driven to move axially for dynamic focusing of the retina. When a front focal length f2 of the second lens, a distance dbetween the second lens and a human eye dioptric system and a back focal length fe of the human eye dioptric system meet conditions as shown in the specification, a coherence gating and a focal planecan be constantly kept coincided in a dynamic focusing process. The system structure, control, adjustment and the like are all greatly simplified, and high-transverse-resolution and high-longitudinal-resolution OCT images of all layers of the retina can be obtained.

Description

technical field [0001] The invention relates to the technical field of OCT imagers, in particular to a retinal full-field OCT imager in which a coherence gate overlaps a focal plane and dynamically adjusts focus. Background technique [0002] The retina is not only related to visual acquisition and brain cognition (the optic nerve is connected to the brain), but also a window for the performance of eye diseases and some systemic diseases. It is possible to realize early detection of lesions through its monitoring. The longitudinal structure of the retina is extremely complex, and within a thickness of less than 400 μm (different regions have different thicknesses), it contains about 8 layers of tissue from the nerve fiber layer to the pigment epithelial cell layer, as well as the internal limiting membrane, external limiting membrane and Bruch's membrane etc. They have different tissue components, structural forms and functions, and their observation requires that the imagin...

Claims

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Application Information

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IPC IPC(8): A61B3/10A61B3/14
CPCA61B3/0016A61B3/102A61B3/14
Inventor 杨亚良邱悦
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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