OCT (Optical Coherence Tomography) system for measuring optical path value of axis oculi and method

An optical path and eye axis technology, applied in the field of OCT system, can solve the problem of inaccurate human eye axis length, and achieve the effect of improving the measurement speed and accuracy, and accurate measurement.

Active Publication Date: 2014-08-13
SHENZHEN CERTAINN TECH CO LTD +1
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Problems solved by technology

[0006] The present invention provides an OCT system and method for measuring the optical distance value of the eye axis. The axial length of the human eye will not be accurate for this defect

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  • OCT (Optical Coherence Tomography) system for measuring optical path value of axis oculi and method
  • OCT (Optical Coherence Tomography) system for measuring optical path value of axis oculi and method
  • OCT (Optical Coherence Tomography) system for measuring optical path value of axis oculi and method

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[0076] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0077] refer to figure 1 , figure 1 It is the total optical path diagram of the present invention, including the OCT system light source 101, fiber coupler 102, detection system 106, control system 107, sample arm assembly 700 and reference arm assembly 1050 on the main optical path; wherein, the sample arm assembly 700 includes the cornea Front and rear position alignment assembly 800 and outer eye camera assembly 400 (see Figure 7 ). The light emitted by the OCT system light source 101 provides incident light to the sample arm assembly 700 and the reference...

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Abstract

The invention discloses an OCT (Optical Coherence Tomography) system for measuring the optical path value of an axis oculi and a method. The system comprises an OCT system light source, an optical fiber coupler, a detection system, a control system, a sample arm component, a reference arm component, a cornea before-and-back position alignment component and an outer eye camera component, wherein the outer eye camera component is used for monitoring an iris of eyes under test, and an operator controls the sample arm component to adjust a corneal vertex to the main optical axis of the OCT system according to the iris; the control system is used for judging the distance from the corneal vertex to an eye objective lens, and the distance from the corneal vertex to the eye objective lens is adjusted to meet the requirement on work of the system by means of the before-and-back adjustment of the sample arm component controlled by the control system; an optical path adjusting component adjusts the optical path of the sample arm component, and thus fundi of different human eyes are matched with the optical path of a reflector of a reference arm of the system to realize the OCT imaging of the fundi; the optical path value LEye of the axis oculi of the human eye can be measured according to the formula: LEye=LRDK1toEc+S+hRetinal. According to the OCT system for measuring the optical path value of the axis oculi and the method, the corneal vertex is accurately positioned, and by combining with the fundus OCT imaging technology, the test result of the optical path value of the axis oculi of the human eye is more accurate.

Description

technical field [0001] The invention belongs to the field of optoelectronics, and in particular relates to an OCT system and method for measuring the optical path value of the eye axis by using corneal positioning. Background technique [0002] The axial length of the eye is an important indicator for judging the source of refractive error of the human eye, distinguishing true myopia from pseudomyopia, and measuring intraocular lens parameters after cataract surgery. The existing eye axial length measurement devices on the market include A-ultrasound measurement method and optical measurement method. The A-ultrasound measurement method adopts the principle of ultrasonic ranging, which requires the probe to directly contact the human eye, and the resolution of the ultrasonic is low, and the measurement is not accurate enough. The optical measurement method is based on the principle of dual-wavelength optical coherence, and the implementation is relatively complicated and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/10
Inventor 蔡守东李鹏王辉代祥松郭曙光吴蕾
Owner SHENZHEN CERTAINN TECH CO LTD
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