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Imaging device for realizing anterior segment OCT integrated biological measuring instrument function based on beam splitter prism

A spectroscopic prism and biometric technology, applied in the field of medical devices, can solve problems such as easy misreading, eye gaze aberration, intraocular structure disorder, etc., and achieve the effect of reducing interference and improving accuracy

Inactive Publication Date: 2021-01-22
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above measurements are highly dependent on the patient's gaze coordination. Patients with partial retinal detachment, silicone oil-filled aphakia, vitreous hemorrhage nystagmus, and Alzheimer's disease, due to the structural disorder in the eye and poor eye gaze, are less than normal. The structure of the eye is more complex and changeable
In conventional ocular axis measurement, it is easy to misread or cause large errors due to eye movement when measuring the interface of detached retina and hemorrhagic membrane.

Method used

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  • Imaging device for realizing anterior segment OCT integrated biological measuring instrument function based on beam splitter prism
  • Imaging device for realizing anterior segment OCT integrated biological measuring instrument function based on beam splitter prism
  • Imaging device for realizing anterior segment OCT integrated biological measuring instrument function based on beam splitter prism

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Embodiment 1

[0024] Such as Figure 1-5 As described above, an imaging device that realizes anterior segment OCT integrated biometric instrument functions based on a beam-splitting prism includes a control center 1 , a light source 2 , a fiber optic coupler 3 , a reference arm 4 , a sample arm 5 and a spectrometer 6 .

[0025] The control center 1 can adopt a computer, which is mainly used for action control and image analysis and processing.

[0026] The light source 2 is used to output light beams, which can be an SLD light source with a center wavelength of 840-880nm and a bandwidth of 45nm.

[0027] Described optical fiber coupler 3 can adopt 2X2 optical fiber coupler, and it is set correspondingly with light source 2, and optical fiber coupler 3 can divide the light beam that light source 2 outputs into two, one beam enters reference arm 4 for reference arm light, and one beam is The light from the sample arm enters the sample arm 5, and at the same time, the reflected light from the...

Embodiment 2

[0044] The second embodiment is basically the same as the first embodiment, the difference is that the reference arm 4 further includes an electric translation stage 46 capable of linear reciprocating motion along the direction of the first reference arm light beam.

[0045] Such as Figure 7 As shown, the first plane mirror 43 is installed on the electric translation platform, and the electric translation platform 46 is connected with the control center 1, and the electric translation platform 46 can be controlled to move through the control center 1, thereby driving the first plane mirror 43 to make a straight line reciprocating action.

[0046] Through the design of the electric translation stage 46, the inherent mode of the original planar mirror fixed design is abandoned, so as to get rid of the inherent measurement range limitation of the OCT system, and achieve eye axis measurement in a larger depth range.

Embodiment 3

[0048] The third embodiment is basically the same as the first embodiment, the difference is that the reference arm 4 also includes an electric translation stage 46 capable of rectilinear reciprocating motion along the direction of the first beam of reference arm light. The electric translation stage 46 is provided with a grating ruler 47 .

[0049] Such as Figure 8 As shown, the first plane reflector 43 is installed on the electric translation stage, and the electric translation stage 46 and the grating ruler 47 are connected with the control center 1, and the electric translation stage 46 can be controlled to move through the control center 1, thereby driving the first plane reflection The mirror 43 performs linear reciprocating motion.

[0050] In addition to achieving eye axis measurement in a wider depth range, the grating scale and the electric translation stage 46 can realize closed-loop automatic control, and the absolute positioning accuracy can reach micron level, r...

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Abstract

The invention provides an imaging device for realizing an anterior segment OCT integrated biological measuring instrument function based on a beam splitter prism. The imaging device divides referencearm light into two beams through the beam splitter prism, when a movable shielding plate is located at a first position, the first beam of reference arm light can be shielded, so that only a second plane mirror can reflect and interfere with a sample arm, and imaging of the anterior segment is realized independently; and when the movable shielding plate is located at a second position, a first plane mirror and the second plane mirror can both reflect and interfere with the sample arm, and imaging is carried out in the same image at the same time, so that the purpose that the positions of the cornea and the retina are still relatively fixed in the involuntary movement process of the eyeball is achieved, the interference of eye movement and other factors on the numerical value is reduced, the accuracy of eye axis measurement is improved, and the imaging device is particularly suitable for special crowds with poor gaze such as nystagmus and Alzheimer's disease.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an imaging device that realizes the function of an anterior segment OCT integrated biometric instrument based on a dichroic prism. Background technique [0002] Optical coherence tomography (OCT) is a new imaging technology based on the principle of low-coherence optical interference. It has the characteristics of high resolution, fast scanning imaging, non-contact and non-destructive detection, and is widely used in the field of medical imaging. . Spectral domain OCT uses the spectrometer detection system to obtain interference spectral signals, and obtains depth information through Fourier transform, thereby further improving the imaging speed and imaging sensitivity. Spectral-domain OCT is an important ophthalmic optical imaging technique. [0003] At present, ophthalmic imaging OCT is divided into anterior segment OCT and fundus OCT according to different imaging ob...

Claims

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Application Information

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IPC IPC(8): A61B3/10
CPCA61B3/102A61B3/10
Inventor 陈思思沈梅晓朱德喜邵一磊吕帆
Owner WENZHOU MEDICAL UNIV
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