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Cornea surface optical path difference measuring device and method of measuring cornea thickness and refractivity

A corneal surface and measuring device technology, applied in the field of optical detection, can solve problems such as corneal optical path difference, achieve the effect of non-destructive measurement and avoid errors

Pending Publication Date: 2019-04-30
FOSHAN UNIVERSITY
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Problems solved by technology

[0005] In order to realize the accurate measurement of human corneal thickness and refractive index, the invention provides a corneal surface optical path difference measuring device and a method for measuring corneal thickness and refractive index, which solves two major problems: the first problem is how to realize the corneal surface optical path difference Poor in vivo measurement; the second problem is how to change the lens focal length without changing the measurement position

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  • Cornea surface optical path difference measuring device and method of measuring cornea thickness and refractivity
  • Cornea surface optical path difference measuring device and method of measuring cornea thickness and refractivity
  • Cornea surface optical path difference measuring device and method of measuring cornea thickness and refractivity

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] Such as Figures 1 to 3 As shown, the corneal surface optical path difference measuring device of the present invention includes a center wavelength of 840nm, a superluminescent light-emitting diode with a bandwidth of 49nm as a detection light source 1, a 50 / 50 optical fiber coupler 2, a reference arm, a sample arm and a spectrometer, The reference arm includes a first collimating mirror 3, a neutral density filter 4 and a first reflecting mirror 5, and the sample arm includes a second collimating mirror 6, a second reflecting mirror 7 and a liquid lens 8 to detect light emitted by a light source 1 After passing through the fiber coupler 2, the light is divi...

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Abstract

A time domain-optical coherence tomography (TD-OCT) technology is adopted to carry out high resolution imaging on a human cornea; the thickness of the human cornea can be accurately measured by usinga quick zoom lens; through the moving distance of a reference arm, the optical path difference between the front surface and the rear surface of a cornea can be calculated, thus the refractivity of the cornea can be calculated by ZEMAX optical simulation software; and the method is noncontact and is used to measure the thickness and refractivity of a cornea. The method can measure the thickness and refractivity of a cornea in a human body, the measurement is noncontact, high precision, and nondestructive; moreover, after a corneal surgery, the thickness and refractivity of corneas can be tracked, and at the same time, a preoperative detection device and method are provided for a refractive surgery.

Description

technical field [0001] The invention belongs to the technical field of optical detection, and in particular relates to a corneal surface optical path difference measuring device and a method for measuring corneal thickness and refractive index. Background technique [0002] The cornea is the transparent part at the front of the eye, covering the iris, pupil and anterior chamber, and provides 70% of the refractive power for the eye. A small change in the cornea can cause a large change in the refractive state. Therefore, people have been working on the research of the cornea. shape and optical properties. Accurate measurement of corneal curvature and central corneal thickness (CCT) provides an important basis for early diagnosis of corneal diseases, preoperative screening and postoperative follow-up of corneal refractive surgery, intraocular lens power calculation, etc. is also of great significance. [0003] The closest existing technical solution to the technical solution...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/10
CPCA61B3/1005A61B3/102
Inventor 黄银瑞秦嘉谭海曙安林蓝公仆黄燕平陈国杰吴小翠
Owner FOSHAN UNIVERSITY
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