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An ophthalmic imaging diagnosis system

An imaging diagnosis and ophthalmology technology, applied in the fields of diagnosis, ophthalmoscopy, medical science, etc., can solve the problems of small field of view, limit the ability of quantitative measurement of the system, and difficult to take into account the internal fixation lamp, etc., to achieve flexible control and field of view resolution. The effect of improving the rate indicator

Active Publication Date: 2019-05-31
SVISION IMAGING LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Among them, the external switching method such as patent US2008 / 0106696A1 requires manual operation by the user, which is less convenient and difficult to take into account the internal fixation lamp; some internal switching methods such as CN102438505ZHONG rely on multiple planar reflective optical elements to perform two independent Switching between optical paths; there are also internal switching methods such as US8427654 and US20080106696A1. By moving the middle image plane of the system to the front, the available field of view is relatively small, and this design is difficult to achieve telecentric imaging, which limits the quantitative measurement of the system. ability

Method used

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Experimental program
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Embodiment 1

[0053] Ophthalmic imaging diagnostic systems, such as Figure 7 As shown, the OCT imaging module, the SLO laser scanning ophthalmoscope imaging module, the anterior segment camera module and the fixation target module share an eyepiece. The working distance L1A from the eyepiece to the human eye under test is adjustable to facilitate the focusing of the anterior segment conjugate imaging system; the distance L2A from the eyepiece to the first dichroic mirror DM01 is adjustable to target the refraction of the human eye Compensate for different differences, specifically for + / -20 diopter range.

[0054] Ophthalmic imaging diagnostic systems, such as Figure 7 As shown, the OCT imaging module and the SLO imaging module are located on the same side of the line where the visual axis of the eye is located; the anterior segment camera module is located on the opposite side. The advantage of this embodiment is that only one dichroic mirror passes through the SLO imaging module, whic...

Embodiment 2

[0067] Ophthalmic imaging diagnostic systems, such as Figure 8As shown, the OCT imaging module, the SLO laser scanning ophthalmoscope imaging module, the anterior segment camera module and the fixation target module share an eyepiece. The working distance L1B from the eyepiece to the tested human eye is adjustable to facilitate the focusing of the anterior segment conjugate imaging system; the distance L2B from the eyepiece to the first dichroic mirror DM01 is adjustable to target the refraction of the human eye Compensate for different differences, specifically for + / -20 diopter range.

[0068] Ophthalmic imaging diagnostic systems, such as Figure 8 As shown, the OCT imaging module, the fixation module, and the anterior segment camera module are all on the same side of the line where the visual axis of the eye is located, while the anterior segment camera module is on the opposite side. The advantage of this embodiment is that the modules are relatively compactly distribu...

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Abstract

The invention discloses an ophthalmic imaging diagnostic system which comprises an eyepiece and an OCT imaging module. The OCT imaging module includes a fundus OCT imaging mode and an anterior segmentOCT imaging mode. The OCT imaging module in the fundus OCT imaging mode has a first intermediate image plane. The first intermediate image plane is located between the eyepiece and the OCT imaging module; and a lens group is arranged in an internal optical path of the OCT imaging module in the fundus OCT imaging mode. The OCT imaging module has a second intermediate image plane located in the OCTimaging module, and a conjugate position of an imaging optical path aperture diaphragm of the OCT imaging module is located between the eyepiece and the OCT imaging module, to obtain the anterior segment OCT imaging mode. The ophthalmic imaging diagnostic system has functions of fundus OCT imaging and anterior segment OCT imaging, and the internal switching of the fundus OCT imaging and the anterior segment OCT imaging is implemented. After the fundus imaging is switched to the anterior segment imaging, a second intermediate image is added in the OCT imaging module. The method enables the angle of incidence of light to the anterior segment to be controlled more flexibly, and the anterior segment field resolution index can be improved. The switching is performed in the optical path of theOCT imaging module, and no influence is generated on other system optical paths in the switching process.

Description

technical field [0001] The invention relates to an ophthalmology imaging diagnosis system. Background technique [0002] Optical coherence tomography (OCT, Optical Coherence Tomography) technology has the characteristics of high resolution, high imaging speed, and no damage. Among them, the OCT device with ophthalmic diagnosis is one of the most widely used OCT technology. [0003] see figure 1 As shown, the patent US8427654 introduces an OCT light path, especially a method for switching between the fundus and anterior segment imaging light paths. By moving a lens group into the OCT optical path, the position of the focal plane of the lens group close to the eye is moved from the inside of the system to the anterior segment. The advantage of this method is that the structure is relatively simple, but the field of view of the anterior segment after switching is small, and the control of the angle of the anterior segment light is inflexible. [0004] see figure 2 As shown...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/10A61B3/12
Inventor 武珩彭先兆
Owner SVISION IMAGING LTD