CN109222887A - A kind of portable hand-held cornea curvimeter based on object space telecentric beam path - Google Patents
A kind of portable hand-held cornea curvimeter based on object space telecentric beam path Download PDFInfo
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- CN109222887A CN109222887A CN201811000518.XA CN201811000518A CN109222887A CN 109222887 A CN109222887 A CN 109222887A CN 201811000518 A CN201811000518 A CN 201811000518A CN 109222887 A CN109222887 A CN 109222887A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea
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Abstract
The present invention provides a kind of portable hand-held cornea curvimeters based on object space telecentric beam path, for checking corneal curvature, it has the feature that, comprising: optometry module has collimation lens barrel, fixation lamp, the first aperture diaphragm and the light splitting piece for deflection optical path；Photographing module, for the reflected image of real-time capture cornea, has and be used to eliminate the first achromatic lens of color difference and the second achromatic lens, the first plane mirror for deflection optical path and the second plane mirror in test cursor and test cursor thus the CCD camera module for forming corneal reflection image for receiving；Real-time monitoring display module, for observing cornea reflected image in real time；Central processing module for connecting and controlling optometry module, photographing module, real-time monitoring display module and wireless communication module there is image processing software to complete the real-time judge to cornea measuring state；And wireless communication module, for measuring data communication and transmission.
Description
Technical field
The invention belongs to medical optometry equipment fields, and in particular to a kind of portable hand-held angle based on object space telecentric beam path
Film curvature instrument.
Background technique
In terms of medical health development direction, automation, intelligent and long-range are the inexorable trends of medical treatment development from now on.State
External last century end has just carried out automation, intelligent and long-range transformation, domestic medical treatment just accelerate now automation,
Intelligent and long-range transformation.With the development of technology of Internet of things, traditional medical mode gradually appear the degree of automation it is low, doctor
In place for the treatment of the deficiencies of resource-constrained, this just necessarily leads to the continuous innovation of medical detection instrument.With mentioning for " internet+" concept
Out, miniaturization, intelligence, wearable Medical Instruments service of goods are designed and researched and developed in pre hospital care, clinical diagnosis and treatment and rehabilitation
The fine vision of the modern medical service security system of the diversification of community medicine, residential care that health care combines, intelligent medical treatment is incited somebody to action
To realization.
China's myopia number and disease incidence rank first in the world, and A nearsighted person at least 300,000,000, and myopia has become China
" state's disease ", inspection and prevention for myopia have become research emphasis in recent years, develop the portable hand-held of miniaturization
Optometry equipment effectively can carry out corneal curvature inspection to China's each age group especially population of adolescent.
In the prior art, a kind of intelligent portable of patent name that inventor Liao Liang is lifted holds vision drop instrument and optometry side
Method.Its refraction system arranges that every group of LED light array has 4 groups of infrared light supplies using 6 groups of infrared LED optical arrays in regular hexagon,
Visible LED array is set before two adjacent groups infrared LED optical arrays, and every group includes 3 groups or 3 groups of visible above radiants, is pressed
It is indicated according to different frequency cycles, attract the attention of user, user can realize self-service survey by lamplight pointing and verbal cue
Amount.The prior art mainly has following disadvantage: the visible optical arrays mistake for being used to attract patient in the refraction system of the device
More, system is excessively complicated, and the lamp of different location interferes with each other, and has dispersed the attention of patient, causes shadow to entire measurement process
It rings.The camera system of the product carries out 3D reconstruction to face using twin-lens, to obtain accurate human eye to instrument camera lens
Distance, when carrying out 3D reconstruction, data volume is very big, and the calculating time is long, and for the patient measured, eyes are had significantly
Sense of discomfort, often will cause measurement failure or measurement accuracy is poor.And the human eye and lens distance 100cm mentioned in its patent
As the distance that can be measured, instrument object distance is excessive, does not meet the design concept of Miniaturized portable hand-held instrument.In order to solve
The above problem devises a kind of portable hand-held cornea curvimeter based on object space telecentric beam path.
Summary of the invention
The present invention be to solve the above-mentioned problems and carry out, and it is an object of the present invention to provide it is a kind of based on object space telecentric beam path just
It takes formula and holds cornea curvimeter.
The present invention provides a kind of portable hand-held cornea curvimeters based on object space telecentric beam path, for checking cornea song
Rate has the feature that, comprising: optometry module has the collimation lens barrel for projecting anterior corneal surface for that will test cursor, uses
In the first aperture diaphragm and use for being used to limit visible light size for issuing the fixation lamp of visible light, being arranged in below fixation lamp
Visible light after it will limit size deflects so that visible light directive tester eyes are to fix the light splitting piece of tester's eye position；
Photographing module has and passing through for eliminating by cornea below light splitting piece is arranged in for the reflected image of real-time capture cornea
First achromatic lens of color difference in the test cursor of reflection, be arranged in below the first achromatic lens for deflecting for the first time
The first plane mirror of test light target after eliminating color difference is arranged in the right side of the first plane mirror and surveys for deflection again
Try the second plane mirror of cursor, eliminating for second for the top that the second plane mirror is arranged in tests cursor color difference
The second achromatic lens, be arranged in the second achromatic lens top for limit second eliminate color difference after test cursor
Second aperture diaphragm of size and for receiving test cursor to form the CCD camera module of corneal reflection image；In real time
Monitoring display module, the corneal reflection image captured for observing photographing module in real time, is provided with for showing corneal reflection
The LED display of image；Central processing module, for connecting and controlling optometry module, photographing module, real-time monitoring display module
And wireless communication module, there is image processing software to complete the real-time judge to cornea measuring state, and complete in one second
Judgement, acquisition, processing and the calculating of pairs of cornea reflected image；And wireless communication module, for being carried out with mobile terminal
The corneal reflection image of tester and corneal curvature numerical value are uploaded to cloud and store and carry out to examining by data communication
The wireless printing of disconnected report, wherein visible light is overlapped after light splitting piece deflects with systematic optical axis, and the quantity for collimating lens barrel is six
It is a, collimate the third hole being provided in lens barrel for issuing test light target light source, for limiting the test cursor size issued
Diameter diaphragm and the collimation lens projected for that will limit the test light standard straight after size, six collimation lens barrels are in regular hexagon
It is distributed and tilts identical angle, so that the test light target joints that six collimation lens barrels project are located on systematic optical axis,
It about joint centrosymmetric two is a pair of of luminous point group, the raw three pairs of luminous point groups of common property, every a pair of light in six test cursors
Point group indicates the corneal curvature on this radial line in the distance on corneal reflection image.
In a kind of portable hand-held cornea curvimeter based on object space telecentric beam path provided by the invention, can also have
Such feature: where light source is near-infrared LED lamp.
In a kind of portable hand-held cornea curvimeter based on object space telecentric beam path provided by the invention, can also have
Such feature: where fixation lamp is visible LED lamp.
In a kind of portable hand-held cornea curvimeter based on object space telecentric beam path provided by the invention, can also have
Such feature: where the second aperture diaphragm is located on the focal plane of the second achromatic lens, the focus of the second achromatic lens
It is overlapped with the center of the second aperture diaphragm, to constitute the object for eliminating measurement error caused by due to the inaccuracy of object plane position
Square telecentric beam path.
In a kind of portable hand-held cornea curvimeter based on object space telecentric beam path provided by the invention, can also have
Such feature: where the receiving plane of CCD camera module is located at the picture plane of the second achromatic lens, and imaging position is located at
The central area of receiving plane.
The action and effect of invention
A kind of portable hand-held cornea curvimeter based on object space telecentric beam path involved according to the present invention, because of the angle
Film curvature instrument structure is simple, miniaturization has thus it is possible to be suitable for the crowd that old man, child etc. are not able to cooperate central seats that directly face the stage measurement
Good applicability；Because the image processing software used realizes the real-time judge to cornea measuring state, and can be
Judgement, acquisition, processing and the calculating that image is completed in one second, thus it is possible to realize automatic measurement corneal curvature；Because using
Equipment can be connect with mobile terminal and be carried out communication and corneal measurement data is uploaded to cloud to carry out by wireless communication module
Storage, enables the surgeon to directly acquire data by cloud to provide diagnostic result, so, the convenience of interrogation is improved,
Enable to patient be in can be completed it is medical, and beyond the clouds on to corneal measurement data store can for hospital save
The time of data preparation, backup and preservation realizes convenient effective management corneal measurement data.Therefore, of the invention one
Portable hand-held cornea curvimeter of the kind based on object space telecentric beam path is measured quick and precisely using easy, wide application of the crowd, can
Realize effectively easily modernization diagnosis and treatment.
Detailed description of the invention
Fig. 1 is a kind of system of the portable hand-held cornea curvimeter based on object space telecentric beam path in the embodiment of the present invention
Structural block diagram；
Fig. 2 is a kind of optometry of the portable hand-held cornea curvimeter based on object space telecentric beam path in the embodiment of the present invention
The concrete structure schematic diagram of module and photographing module；
Fig. 3 is the schematic diagram of the corneal reflection image in the embodiment of the present invention.
Specific embodiment
In order to which the technological means for realizing the present invention is easy to understand with effect, with reference to embodiments and attached drawing is to this
Invention is specifically addressed.
Embodiment:
Fig. 1 is a kind of system of the portable hand-held cornea curvimeter based on object space telecentric beam path in the embodiment of the present invention
Structural block diagram, Fig. 2 are that a kind of portable hand-held cornea curvimeter based on object space telecentric beam path is tested in the embodiment of the present invention
The concrete structure schematic diagram of optical module and photographing module.
As depicted in figs. 1 and 2, a kind of portable hand-held corneal curvature based on object space telecentric beam path of the embodiment of the present invention
Instrument 100, for checking corneal curvature, including optometry module 10, photographing module 20, real-time monitoring display module 30, central processing
Module 40 and wireless communication module 50.
Optometry module 10 has for test cursor to be projected the collimation lens barrel 11 of anterior corneal surface, is used to issue visible light
Fixation lamp 12, the first aperture diaphragm 13 for limiting visible light size for being arranged in below fixation lamp 12 and for will limit
Visible light after size processed deflects so that visible light directive tester eyes are to fix the light splitting piece 14 of tester's eye position.
Visible light is overlapped after the deflection of light splitting piece 14 with systematic optical axis, and the quantity of collimation lens barrel 11 is six (in figure
Show two), it is big to collimate the test cursor being provided in lens barrel 11 for issuing test light target light source 15, for limiting sending
Small third aperture diaphragm 16 and the collimation lens 17 projected for the test light standard straight after size will to be limited, six collimations
Lens barrel 11 is distributed in regular hexagon and tilts identical angle, so that the test light target that six collimation lens barrels 11 project crosses
Point is located on systematic optical axis.
Light source 15 is near-infrared LED lamp, and preferred center wavelength is the near-infrared LED lamp of 850mm.
Fixation lamp 12 is visible LED lamp, and optimal wavelength is the visible LED lamp of 680mm.
Photographing module 20 is used for the reflected image of real-time capture cornea, is used to eliminate with being arranged in below light splitting piece 14
By the first achromatic lens 21 of color difference in the test cursor by corneal reflection, it is arranged in below the first achromatic lens 21
For deflecting the first plane mirror of test light target 22 after eliminating color difference for the first time, the first plane mirror 22 being arranged in
Top of the right side for deflecting the second plane mirror of test light target 23 again, being arranged in second plane mirror 23 is used for
Second eliminate the second achromatic lens 24 of test cursor color difference, the top that the second achromatic lens 24 is set for limiting
The second aperture diaphragm 25 of cursor size is tested after second of elimination color difference of system and for receiving test cursor to form angle
The CCD camera module 26 of film reflected image.
Second aperture diaphragm 25 is located on the focal plane of the second achromatic lens 24, the focus of the second achromatic lens 24 with
The center of second aperture diaphragm 25 is overlapped, to constitute the object for eliminating measurement error caused by due to the inaccuracy of object plane position
Square telecentric beam path.
The receiving plane of CCD camera module 26 is located at the picture plane of the second achromatic lens 24, and imaging position is located at reception
The central area in face.
The corneal reflection image that real-time monitoring display module 30 is captured for observing photographing module in real time, is provided with and is used for
Show that the LED display of corneal reflection image, LED display can also show the calculated result of corneal curvature and as man-machine friendships
Mutual window controls instrument.
Central processing module 40 is for connecting and controlling optometry module 10, photographing module 20, real-time monitoring display module 30
And wireless communication module 50, there is image processing software to complete the real-time judge to cornea measuring state, and in one second
It completes to the judgement of cornea reflected image, acquisition, processing and calculating.
Wireless communication module 50 is used to carry out data communication with mobile terminal, by the corneal reflection image of tester and angle
Film curvature values are uploaded to cloud and are stored and carried out the wireless printing to diagnosis report.
Fig. 3 is the schematic diagram of the corneal reflection image in the embodiment of the present invention.
As shown in figure 3, about centrosymmetric two luminous points of joint being a pair of of luminous point group, common property in six test cursors
Raw three pairs of luminous point groups, every a pair of luminous point group indicate the corneal curvature on this radial line in the distance on corneal reflection image.
The course of work of the portable hand-held cornea curvimeter based on object space telecentric beam path of the present embodiment is as follows:
When the portable hand-held cornea curvimeter 100 based on object space telecentric beam path of the present embodiment starts measurement, fixation lamp
12 issue visible light, are overlapped after the deflection of light splitting piece 14 with systematic optical axis and come immobilized patients eye position, collimate the light in lens barrel 11
The test cursor that source 15 issues projects cornea after third aperture diaphragm 16 limits beam size and collimation lens 17 collimates
Central area, enters photographing module 20 after anterior surface of cornea reflection, and test cursor images mould by CCD after achromatism twice
Group 26 captures to form corneal reflection image, to be formed by the LED display in real-time monitoring display module 30 to observe in real time
Corneal reflection image, be moved forward and backward instrument, be imaged in corneal reflection image clearly and when focusing good, central processing module
Image processing software in 40 can automatically handle cornea reflected image to calculate corneal curvature, and by the cornea after calculating
Curvature shows in LED display, later can by wireless communication module 50 by the corneal reflection image of tester and angle
Film curvature values are uploaded to cloud and are stored, and the printing of diagnosis report is realized with printer wireless connection.
The action and effect of embodiment
A kind of portable hand-held cornea curvimeter based on object space telecentric beam path according to involved in the present embodiment, because should
Cornea curvimeter structure is simple, miniaturization has thus it is possible to be suitable for the crowd that old man, child etc. are not able to cooperate central seats that directly face the stage measurement
There is good applicability；Because the image processing software used realizes the real-time judge to cornea measuring state, and can
Judgement, acquisition, processing and the calculating that image is completed in one second, thus it is possible to realize automatic measurement corneal curvature；Because using
Wireless communication module, equipment can be connect with mobile terminal and be carried out communication and by corneal measurement data be uploaded to cloud into
Row storage, enables the surgeon to directly acquire data by cloud to provide diagnostic result, so, improve the convenient of interrogation
Property, enable to patient be in can be completed it is medical, and beyond the clouds on to store to corneal measurement data can be hospital
The time for saving data preparation, backup and preservation, realize convenient effective management corneal measurement data.Therefore, this implementation
A kind of portable hand-held cornea curvimeter based on object space telecentric beam path of example is measured quickly quasi- using easy, wide application of the crowd
Really, effectively easily modernization diagnosis and treatment be can be realized.
A kind of portable hand-held cornea curvimeter based on object space telecentric beam path involved in the present embodiment, because using object
Square telecentric beam path is as phtographic lens, thus it is possible to measurement error caused by effectively eliminating due to image planes positional shift.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (5)
1. a kind of portable hand-held cornea curvimeter based on object space telecentric beam path, for checking corneal curvature, which is characterized in that
Include:
Optometry module has and projects the collimation lens barrel of anterior corneal surface for that will test cursor, is used to issue the fixation of visible light
Lamp, be arranged in below the fixation lamp for limit the visible light size the first aperture diaphragm and for will limit greatly
The visible light after small deflects so that the visible light directive tester eyes are to fix the light splitting of tester's eye position
Piece；
Photographing module has and passing through below the light splitting piece for eliminating is arranged in for the reflected image of real-time capture cornea
It crosses the first achromatic lens of color difference in the test cursor by the corneal reflection, be arranged in first achromatic lens
First plane mirror of test light target of lower section being used to deflect after eliminating color difference for the first time, setting are flat described first
The right side of face reflective mirror for deflect again second plane mirror of test light target, setting it is reflective in second plane
The second achromatic lens for eliminating the test cursor color difference for the second time of the top of mirror is arranged in second achromatism
Second aperture diaphragm for testing cursor size is eliminated after color difference and for connecing for limit second in the top of lens
The test cursor is received to form the CCD camera module of the corneal reflection image；
Real-time monitoring display module, the corneal reflection image captured for observing the photographing module in real time, is provided with
For showing the LED display of the corneal reflection image；
Central processing module, for connecting and controlling the optometry module, the photographing module, the real-time monitoring display module
And the wireless communication module, there is image processing software to complete the real-time judge to the cornea measuring state, and
Judgement, acquisition, processing and the calculating to the corneal reflection image are completed in one second；And
Wireless communication module, for mobile terminal carry out data communication, by the corneal reflection image of the tester with
And the corneal curvature numerical value is uploaded to cloud and is stored and carried out the wireless printing to diagnosis report,
Wherein, the visible light is overlapped after light splitting piece deflection with systematic optical axis,
The quantity of the collimation lens barrel is six, be provided in the collimation lens barrel for issue the test light target light source,
For limiting the third aperture diaphragm of the test cursor size issued and for the test light after size will to be limited
The collimation lens that standard straight projects, six collimation lens barrels are distributed in regular hexagon and tilt identical angle, so that six
The test light target joint that a collimation lens barrel projects is located on the systematic optical axis, in six test cursors
It is a pair of of luminous point group, the raw three pairs of luminous point groups of common property, every a pair luminous point about the joint centrosymmetric two
Distance of the group on the corneal reflection image indicates the corneal curvature on this radial line.
2. portable hand-held according to claim 1 holds cornea curvimeter, it is characterised in that:
Wherein, the light source is near-infrared LED lamp.
3. portable hand-held cornea curvimeter according to claim 1, it is characterised in that:
Wherein, the fixation lamp is visible LED lamp.
4. portable hand-held cornea curvimeter according to claim 1, it is characterised in that:
Wherein, second aperture diaphragm is located on the focal plane of second achromatic lens, second achromatic lens
Focus be overlapped with the center of second aperture diaphragm, thus constitute for eliminate because object plane position inaccuracy due to caused by survey
Measure the object space telecentric beam path of error.
5. portable hand-held cornea curvimeter according to claim 1, it is characterised in that:
Wherein, the receiving plane of the CCD camera module is located at the picture plane of second achromatic lens, and imaging position is located at
The central area of the receiving plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811000518.XA CN109222887A (en) | 2018-08-30 | 2018-08-30 | A kind of portable hand-held cornea curvimeter based on object space telecentric beam path |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811000518.XA CN109222887A (en) | 2018-08-30 | 2018-08-30 | A kind of portable hand-held cornea curvimeter based on object space telecentric beam path |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031835A (en) * | 1989-05-30 | 1991-01-08 | Canon Inc | Apparatus for measuring shape of cornea |
| JP2707249B2 (en) * | 1987-03-06 | 1998-01-28 | キヤノン株式会社 | Corneal shape measuring device |
| CN1561181A (en) * | 2001-07-30 | 2005-01-05 | 博士伦公司 | Anterior chamber diameter measurement system from limbal ring measurement |
| CN101612033A (en) * | 1998-12-10 | 2009-12-30 | 卡尔蔡斯耶拿有限公司 | Heed contacted measure eyes axial length and/or corneal curvature and/or anterior chamber depth, the apparatus and method measured of IOL especially |
| CN104116494A (en) * | 2014-08-21 | 2014-10-29 | 太原中北新缘科技中心 | Corneal curvature measuring device based on telecentric light path system |
-
2018
- 2018-08-30 CN CN201811000518.XA patent/CN109222887A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2707249B2 (en) * | 1987-03-06 | 1998-01-28 | キヤノン株式会社 | Corneal shape measuring device |
| JPH031835A (en) * | 1989-05-30 | 1991-01-08 | Canon Inc | Apparatus for measuring shape of cornea |
| CN101612033A (en) * | 1998-12-10 | 2009-12-30 | 卡尔蔡斯耶拿有限公司 | Heed contacted measure eyes axial length and/or corneal curvature and/or anterior chamber depth, the apparatus and method measured of IOL especially |
| CN1561181A (en) * | 2001-07-30 | 2005-01-05 | 博士伦公司 | Anterior chamber diameter measurement system from limbal ring measurement |
| CN104116494A (en) * | 2014-08-21 | 2014-10-29 | 太原中北新缘科技中心 | Corneal curvature measuring device based on telecentric light path system |
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Application publication date: 20190118 |