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Optical fiber type rapid measuring system for eyeball axial multiparameter

A measurement system and multi-parameter technology, which is applied in the fields of eye testing equipment, medical science, gonioscopy, etc., can solve problems such as divergence of returning light, and achieve the effect of reducing installation accuracy, precise positioning accuracy, and simple installation process

Active Publication Date: 2019-08-27
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The delay line has the characteristics of fast scanning speed and good linearity, but the return light will diverge due to the focal length of the curved mirror

Method used

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  • Optical fiber type rapid measuring system for eyeball axial multiparameter
  • Optical fiber type rapid measuring system for eyeball axial multiparameter
  • Optical fiber type rapid measuring system for eyeball axial multiparameter

Examples

Experimental program
Comparison scheme
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Embodiment

[0054]The low-coherence light source 1 adopts a broadband light source, selects a superluminescent diode with a wavelength of 840nm and a bandwidth of 50nm, and its coherence length is 11.5 μm. Of course, a broadband light source that meets the requirements can also be used. The broadband light source is divided into two paths by an optical fiber beam splitter 2. One of them is the measurement light, the measurement light enters the first collimator 4 through the second exit after the first circulator 3, and the parallel light emitted by the first collimator 4 shoots to the eyeball 6 and returns, carrying the eyeball 6 The reflected light of the information enters the first circulator 3 through the first collimator 4, and enters the first coupler 8 from the third exit of the first circulator 3; the other light is the reference light, and the reference light passes through the second ring Type 7 enters the wavelength division multiplexer 11 through its second exit, and enters th...

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Abstract

The invention relates to an optical fiber type rapid measuring system for eyeball axial multiparameter, and belongs to the technical field of measurement applying optical instruments to ophthalmology.The system is composed of a set of low coherent systems integrated on a triaxial mobile platform, a set of high coherent systems and an eyeball aligning system; two sets of optical fiber interferencesystems are constructed to realize measuring requirements; the high coherent systems are a Mach Zehnder interferometer; low coherent signals are used to perform accurate positioning on different tissue interfaces of eyeball axial direction; the high coherent systems are a Michelson interferometer; uniform high coherent signals are used as metering scales for performing distance measurement on thelow coherent signals. The system has the advantages of non-contact measurement, rapid measuring speed, high accuracy, high signal-to-noise ratio, high eyeball alignment accuracy and the like.

Description

technical field [0001] The invention belongs to the technical field of measurement of optical instruments applied in ophthalmology, and in particular relates to an optical fiber type eyeball axial multi-parameter rapid measurement system. Background technique [0002] The biological measurement of the axial length of the eyeball is to measure the axial structural parameters of the eyeball by various related inspection methods. Including the measurement of corneal thickness, anterior depth, lens thickness, vitreous cavity length and axial length. Many ophthalmic diseases are related to ocular axial biometric parameters. Such as glaucoma, myopia, hyperopia, cataract, etc., whose clinical manifestations are changes in the axial length of the eye or other biometric parameters. Accurately obtaining axial parameters of the eyeball is of great help to the diagnosis of ophthalmic diseases. [0003] With the development of new diagnosis and treatment technologies in ophthalmology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/10A61B3/117
CPCA61B3/102A61B3/1005A61B3/1173
Inventor 王劲松许鹏飞候亮李海兰郑印
Owner CHANGCHUN UNIV OF SCI & TECH
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