CN104095610B - Optical system for measuring eyes diopter and cornea curvature radius of human - Google Patents
Optical system for measuring eyes diopter and cornea curvature radius of human Download PDFInfo
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- CN104095610B CN104095610B CN201410360741.0A CN201410360741A CN104095610B CN 104095610 B CN104095610 B CN 104095610B CN 201410360741 A CN201410360741 A CN 201410360741A CN 104095610 B CN104095610 B CN 104095610B
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Abstract
The invention provides an optical system for measuring eyes diopter and cornea curvature radius of a human. The system comprises a positioning monitoring light path, a projection light path, a measuring light path, a scieropia light path, and a cornea curvature measuring light path, which share an optical element. Compared with the prior art, the optical system has the technical effects that 1, a human eyes diopter measuring light path and the cornea curvature measuring light path are effectively combined in an optical system, and therefore, the human eyes diopter and cornea curvature can be accurately measured through an computer optometry unit; 2, the scieropia light path is adopted, by which the optimal cornea curvature testing state can be reached while the optic nerves of eyes to be tested are relaxed; the positioning monitoring light path enables accurate measuring precision after the distance from the eyes to be tested to the cornea curvature measuring light path is fixed; as a result, the eyes diopter and cornea curvature radius of human can be synchronously measured with one optometry unit.
Description
Technical field
A kind of optical system measuring human eye diopter and corneal curvature radius of the present invention, relates to optometry imaging and surveys
Amount technical field, a kind of optical system that can measure human eye diopter and corneal curvature.
Background technology
Either in ophthalmology or optician's shop, eye refractometer is all important auxiliary detection medical procedure.Computer is tested
Light instrument is as the optometry equipment of a kind of objectivity, by launching the infrared light of a branch of specific wavelength, through cornea,
The eyeball organs such as crystalline lens, aqueous humor, retina, finally project eyeball retina, then are reflected back the phase of instrument
Answer in optical system, then received by CCD, convert optical signal into the signal of telecommunication, decomposite concave-sphere, post mirror
With the data such as axle position, draw the parameter such as refractive diopter of tested eye, correct for eyeglass and accurate diopter is provided
Number and interocular distance.Have that measuring speed is fast, data accuracy strong, automaticity high.
Cornea is one of important feature of human eye, if each meridian radius of curvature of cornea is inconsistent, by shape
Become astigmatism, attach great importance to the inspection of corneal curvature radius, the inspection of especially front radius of curvature the most clinically.
Contact lens is worn in recent years, and what Intraocular implantation and myopia radial keratotomy were performed the operation carries out,
The inspection of corneal curvature radius is the most essential.Cornea curvimeter is used for measuring anterior surface of cornea curvature, and it is surveyed
Amount principle is to place the object of particular size at a precorneal ad-hoc location, and this object reflects through anterior surface of cornea
One upright virtual image of rear generation, the size measuring this picture can calculate the radius of curvature of anterior surface of cornea.
The eye refractometer of domestic existing band corneal curvature function, its design principle and precision all do not reach national standard
Requirement, it is impossible to meet the market demand.Keratometry is located just at detecting the focal length of light path when tested eyes
Form the image of the most accurate corneal reflex light during place, accurate corneal curvature value can be calculated.But, from testing
Reflected light image shown on light instrument display determines that the exact position of tested eyes is not easy to.Eyes
Measure position and may produce displacement because of eye motion.It addition, really the degree of accuracy of measurement position also depends on
Skill in survey crew.
Summary of the invention
It is an object of the invention to overcome drawbacks described above, it is provided that a kind of by human eye diopter measurement and corneal curvature
Measure the method effectively combined, it is achieved that human eye diopter can be carried out on an eye refractometer simultaneously and cornea is bent
The measurement of rate, has measurement accuracy is high, speed is fast, easy to operate a kind of measurement human eye diopter and cornea
The optical system of radius of curvature.
The present invention adopts the following technical scheme that it includes positioning monitoring light path, projecting light path, optical path, mist
Depending on light path and keratometry light path common optical elements, projection lighting lamp, white light, location illuminating lamp,
Four groups of light sources that illuminating lamp is formed are respectively by Amici prism one, Amici prism two, dichroic reflector, with holes
Prism, reflecting mirror produce reflection or the refraction of light, are formed and monitor light path, projecting light path, optical path, mist
Depending on light path and five tunnel light paths of keratometry light path；Wherein:
Location illuminating lamp on the left of be provided with location orifice plate, location illuminating lamp on the right side of be provided with connect mesh object lens, Amici prism one,
Amici prism two, positioning monitoring object lens and positioning monitoring imageing sensor composition positioning monitoring light path；
Optical path is by connecing mesh object lens, Amici prism one, dichroic reflector, reflecting mirror, measurement object lens, stain
Plate, relay objective, image-forming objective lens and the order arrangement of diopter measurement imageing sensor；
Keratometry light path according to bright lamp, aperture, collimator objective, connect mesh object lens, Amici prism one, point
Light prism two, diaphragm, keratometry object lens, keratometry imageing sensor order rearranges；
Projecting light path by projection lighting lamp, annular graticle, projection objective, prism with holes, dichroic reflector,
Amici prism one, connect mesh object lens order arrangement；
Mist depending on optical routing white light, mist visible image plate, mist depending on object lens, dichroic reflector, Amici prism one, connect
Mesh object lens order rearranges.
Further, described location illuminating lamp is the transmitting wavelength of 8 LED, LED uniform on a circle
For 940nm.
Further, described location orifice plate is a dark slide having centre bore, have above dark slide 8 uniform
Printing opacity aperture, its position with location illuminating lamp arrangement corresponding.
Further, described projection lighting lamp be an emission spectrum be the LED of 850nm.
Further, the emission spectrum of described white light is 380nm～780nm.
Further, the projection lighting lamp in projecting light path and annular graticle, the relay objective in optical path,
Mist is fixed on a matrix depending on the white light in light path and mist visible image plate, is combined into moving cell, can be along light
Direction of principal axis moves simultaneously.
Further, described illuminating lamp be an emission spectrum be the LED of 950nm.By illuminating lamp, aperture and
Light path launched by the collimation of collimator objective composition, the most uniform.
Further, a pair wavelength of described Amici prism is that the light of 380nm～780nm and 850nm is high anti-,
High thoroughly to the light that wavelength is 950nm.
Further, the described Amici prism two R:T=1:1 to the light that wavelength is 950nm.
Further, described dichroic reflector is high anti-to the light that wavelength is 380nm～780nm, to wavelength is
The light of 950nm is high thoroughly.
The present invention has following technical effect that compared with in first technology
1, human eye diopter measurement light path and keratometry light path are effectively combined in an optics by the present invention
In system, the accurate measurement of human eye diopter and corneal curvature can be realized in rafractive.
2, have employed mist in the present invention and regard light path, when corneal curvature is tested, the optic nerve of eye to be measured loosens,
Reach optimal test mode.Have employed positioning monitoring light path, make eye to be measured to keratometry light path away from
From immobilizing, so can reach certainty of measurement more accurately.
Accompanying drawing explanation
Fig. 1 is the optical system structure schematic diagram of the present invention；
Fig. 2 is the schematic diagram of the location orifice plate of the present invention；
Fig. 3 is the keratometry hot spot schematic diagram of the present invention.
Detailed description of the invention
Combine accompanying drawing with face, by embodiment, technical scheme is further described specifically, but
Protection scope of the present invention should not limited with this.
As shown in accompanying drawing 1,2,3, a kind of optical system that can measure human eye diopter and corneal curvature radius,
It includes that positioning monitoring light path, projecting light path, optical path, mist regard light path and keratometry light path, this
Five kinds of light path common optical elements, projection lighting lamp 201, white light 301, location illuminating lamp 101, illumination
Four groups of light sources that lamp 501 is formed are respectively by Amici prism 1, Amici prism 2 106, dichroic reflector
205, prism 204 with holes, reflecting mirror 401 produce reflection or the refraction of light, form positioning monitoring light path, throwing
Shadow light path, optical path, mist regard light path and five tunnel light paths of keratometry light path.Wherein:
It is provided with on the left of the illuminating lamp 101 of location on the right side of location orifice plate 102, location illuminating lamp 101 to be provided with and connects mesh object lens
104, Amici prism 1, Amici prism 2 106, positioning monitoring object lens 107 and positioning monitoring image sensing
Device 108 forms positioning monitoring light path；Amici prism 1 be connected to positioning monitoring light path and projecting light path,
Optical path, mist regard light path.Amici prism 2 106 is connected to positioning monitoring light path and keratometry light
Road；
Optical path by connect mesh object lens 104, Amici prism 1, dichroic reflector 205, reflecting mirror 401,
Measure object lens 402, stain plate 403, relay objective 404, image-forming objective lens 405 and diopter measurement image to pass
Sensor 406 order arrangement；
Keratometry light path according to bright lamp 501, aperture 502, collimator objective 503, connect mesh object lens 104,
Amici prism 1, Amici prism 2 106, diaphragm 504, keratometry object lens 505, corneal curvature
Measure imageing sensor 506 order to rearrange；Amici prism 106 connects keratometry light path and location
Monitor light path；
Projecting light path by projection lighting lamp 201, annular graticle 202, projection objective 203, prism with holes 204,
Dichroic reflector 205, Amici prism 1, connecing mesh object lens 104 order arrangement, dichroic reflector 205 is even
Jie Liao projecting light path and mist regard light path；Prism 204 with holes is connected to optical path and projecting light path；
Mist regard optical routing white light 301, mist visible image plate 302, mist regard object lens 303, dichroic reflector 205,
Amici prism 1, connecing mesh object lens 104 and form, dichroic reflector 205 is connected to mist and regards light path and projected light
Road, optical path.
As the preferred embodiments of the present invention, described location illuminating lamp 101 is on a circle uniform 8
The a length of 940nm of transmitted wave of individual LED, LED；Described location orifice plate 102 is a shading having centre bore
Plate, has 8 uniform printing opacity apertures above dark slide, its position is corresponding with the arrangement of location illuminating lamp.
As the preferred embodiments of the present invention, described projection lighting lamp 201 be an emission spectrum be 850nm
LED.
As the preferred embodiments of the present invention, the emission spectrum of described white light 301 is 380nm～780nm.
As the preferred embodiments of the present invention, the projection lighting lamp 201 in projecting light path and annular graticle 202,
Relay objective 404 in optical path, mist is fixed on depending on the white light 301 in light path and mist visible image plate 302
On one matrix, it is combined into moving cell 601, can move along optical axis direction simultaneously.
As the preferred embodiments of the present invention, described illuminating lamp 501 be an emission spectrum be 950nm
LED.Light path launched by the collimation that is made up of illuminating lamp 501, aperture 502 and collimator objective 503, vertical and
In horizontal direction the most uniform.
As the preferred embodiments of the present invention, one 105 pairs of wavelength of described Amici prism are 380nm～780nm
The light of (numerical value that employing determines) and 850nm is high anti-, high thoroughly to the light that wavelength is 950nm.
As the preferred embodiments of the present invention, 2 106 pairs of wavelength of described Amici prism are the light of 950nm
R:T=1:1；Described dichroic reflector 205 is 380nm～780nm (numerical value that employing determines) to wavelength
Light high anti-, high thoroughly to the light that wavelength is 950nm.
As shown in accompanying drawing 1,2,3, during work, location illuminating lamp 101 illuminates location orifice plate 102, is formed at
Uniform on one circle 8 luminous circle speckle, these 8 round speckles are irradiated on the cornea of eye 103 to be measured, by cornea
Reflection, through connecing mesh object lens 104, Amici prism 1, Amici prism 2 106, positioning monitoring object lens 107,
It is positioned monitoring picture sensor 108 to receive, is formed at round speckle uniform on the circle of certain diameter.When connecing mesh thing
The optical axis of mirror 104 and the optical axis coincidence of eye to be measured 103, and when meeting a certain designed distance, 8 round speckle imagings
The most clear, and it is positioned at the field of view center of positioning monitoring imageing sensor 108.
Projection lighting lamp 201 illuminates annular graticle 202 and forms the circular ring of light, and the circular ring of light is through projection objective
203, the reflection of prism 204 with holes, the transmission of dichroic reflector 205, the reflection of Amici prism 1 and
Connect the transmission of mesh object lens 104, be irradiated to eye 103 to be measured, by the fundus reflex of eye 103 to be measured, be then passed through
Connecing the transmission of mesh object lens 104, the reflection of Amici prism 1, the transmission of dichroic reflector 205, through band
The aperture of hole prism 204, is reflected by reflecting mirror 401, more measured object lens 402, stain plate 403, in
Continue object lens 404, image-forming objective lens 405, is received by diopter measurement imageing sensor 406.Before optical axis direction
Rear moving movement unit, makes circular ring of light imaging on diopter measurement sensor 406 the most clear.At this moment,
The image on mist visible image plate 302 illuminated by white light 301, regards object lens 303, dichroic reflector through mist
The reflection of 205, the reflection of Amici prism 1, then it is irradiated to eye 103 to be measured through connecing mesh object lens 104.
When circular ring of light imaging on diopter measurement sensor 406 is the most clear, the mist that eye 103 to be measured is seen regards
Image is the most clear, makes the optic nerve of eye 103 to be measured loosen, reaches optimal test mode.
The position of moving cell 601 under different diopter can be demarcated with standard simulation eye, single by measuring motion
The position of unit 601, can calculate the diopter of eye 103 to be measured.
Illuminating lamp 501 in keratometry light path illuminates aperture 502, is formed flat through collimator objective 503
Row light beam is irradiated to eye 103 to be measured, by the corneal reflex of eye to be measured, through connecing mesh object lens 104 and Amici prism
One 105, the prism 2 106 that is split reflects, through diaphragm 504, through keratometry object lens 505,
Received by keratometry imageing sensor 506.Due to illuminating lamp 501, aperture 502 and collimator objective 503
4 collimations of composition launch light path, through keratometry light path, at keratometry imageing sensor
Form 4 circular light spots on 506, by measuring the diameter of 4 circular light spot composition annulus, can calculate
Corneal curvature radius to eye 103 to be measured.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention.All in the present invention
Spirit and principle within any amendment, equivalent and the improvement etc. made, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (6)
1. the optical system measuring human eye diopter and corneal curvature radius, it is characterised in that: include location prison
Regarding light path and keratometry light path depending on light path, projecting light path, optical path, mist, Qie Zhe five tunnel light path is altogether
With optical element, four groups of light sources that projection lighting lamp, white light, location illuminating lamp, illuminating lamp are formed lead to respectively
Cross Amici prism one, Amici prism two, dichroic reflector, prism with holes, reflecting mirror produce light reflection or
Refraction；Wherein:
Location illuminating lamp on the left of be provided with location orifice plate, location illuminating lamp on the right side of be provided with connect mesh object lens, Amici prism one,
Amici prism two, positioning monitoring object lens and positioning monitoring imageing sensor composition positioning monitoring light path；
Optical path is by connecing mesh object lens, Amici prism one, dichroic reflector, reflecting mirror, measurement object lens, stain
Plate, relay objective, image-forming objective lens and the order arrangement of diopter measurement imageing sensor；
Keratometry light path according to bright lamp, aperture, collimator objective, connect mesh object lens, Amici prism one, point
Light prism two, diaphragm, keratometry object lens, keratometry imageing sensor order rearranges；
Projecting light path by projection lighting lamp, annular graticle, projection objective, prism with holes, dichroic reflector,
Amici prism one, connect mesh object lens order arrangement；
Mist depending on optical routing white light, mist visible image plate, mist depending on object lens, dichroic reflector, Amici prism one, connect
The order arrangement of mesh object lens；
Amici prism one connects positioning monitoring light path and projecting light path, optical path, mist regard light path；Amici prism
Two connect positioning monitoring light path and keratometry light path；A pair wavelength of described Amici prism be 380nm～
The light of 780nm and 850nm is high anti-, high thoroughly to the light that wavelength is 950nm；Described Amici prism two
R:T=1:1 to the light that wavelength is 950nm；
Described location illuminating lamp is that the transmitted wave of 6 12 LED, LED uniform on a circle is a length of
940nm；Described location orifice plate is a dark slide having centre bore, have above dark slide 8 uniform saturating
Light aperture, its position is corresponding with the arrangement of location illuminating lamp；
Owing to 4 collimations of illuminating lamp, aperture and collimator objective composition launch light path, through keratometry
Light path, forms 4 circular light spots on keratometry imageing sensor, by measuring 4 circular light spots
The diameter of composition annulus, can be calculated the corneal curvature radius of eye to be measured.
A kind of optical system measuring human eye diopter and corneal curvature radius the most according to claim 1, its
Be characterised by: described projection lighting lamp be an emission spectrum be the LED of 850nm.
A kind of optical system measuring human eye diopter and corneal curvature radius the most according to claim 1, its
It is characterised by: the emission spectrum of described white light is 380nm～780nm.
A kind of optical system measuring human eye diopter and corneal curvature radius the most according to claim 1, its
It is characterised by: the projection lighting lamp in projecting light path and the relay objective in annular graticle, optical path, mist
It is fixed on a matrix depending on the white light in light path and mist visible image plate, is combined into moving cell, can be along optical axis
Move in direction simultaneously.
A kind of optical system measuring human eye diopter and corneal curvature radius the most according to claim 1, its
Be characterised by: described illuminating lamp be an emission spectrum be the LED of 950nm；By illuminating lamp, aperture and
Light path launched by the collimation of collimator objective composition, the most uniform.
A kind of optical system measuring human eye diopter and corneal curvature radius the most according to claim 1, its
It is characterised by: described dichroic reflector is high anti-to the light that wavelength is 380nm～780nm, to wavelength is
The light of 950nm is high thoroughly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410360741.0A CN104095610B (en) | 2014-07-25 | 2014-07-25 | Optical system for measuring eyes diopter and cornea curvature radius of human |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410360741.0A CN104095610B (en) | 2014-07-25 | 2014-07-25 | Optical system for measuring eyes diopter and cornea curvature radius of human |
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| CN104095610A CN104095610A (en) | 2014-10-15 |
| CN104095610B true CN104095610B (en) | 2017-01-11 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887176B (en) * | 2015-06-18 | 2018-02-06 | 苏州四海通仪器有限公司 | The autonomous perception measurement device of hand-held and eyesight measurement method |
| CN104905763B (en) | 2015-06-18 | 2017-12-19 | 苏州四海通仪器有限公司 | The optometry equipment of measurable other center defocus |
| US20190004281A1 (en) * | 2015-12-30 | 2019-01-03 | Shenzhen Royole Technologies Co., Ltd. | Head mounted display device |
| CN107436490B (en) * | 2016-05-25 | 2020-11-20 | 中兴通讯股份有限公司 | Adjusting method and device and virtual reality glasses |
| DE102016112023A1 (en) * | 2016-06-30 | 2018-01-04 | Carl Zeiss Ag | Component, computer program, eye glass system and kit |
| CN106344173A (en) * | 2016-09-21 | 2017-01-25 | 爱博诺德（北京）医疗科技有限公司 | Light source for corneal astigmatism real-time positioning device |
| CN110123262B (en) * | 2018-02-08 | 2024-06-28 | 深圳莫廷医疗科技股份有限公司 | Ophthalmic measurement system and method |
| CN109602389B (en) * | 2018-12-18 | 2022-05-17 | 重庆远视科技有限公司 | Modularized optical measurement system and optometry device |
| CN112060052B (en) * | 2020-09-16 | 2022-02-08 | 宁波市眼科医院 | Robot equipment capable of automatically optometry and corneal curvature detection |
| CN113440099B (en) * | 2021-06-07 | 2023-08-15 | 天津市索维电子技术有限公司 | Comprehensive human eye vision inspection device and method |
| TWI822556B (en) * | 2023-01-12 | 2023-11-11 | 張朝凱 | Corneal curvature measurement system and measurement method |
| CN118078203B (en) * | 2024-04-23 | 2024-06-21 | 中国科学院长春光学精密机械与物理研究所 | Optical coherence tomography device for synchronously measuring cornea and retina of eye |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62290435A (en) * | 1986-06-09 | 1987-12-17 | キヤノン株式会社 | Cornea shape measuring apparatus |
| JPH0753151B2 (en) * | 1986-07-17 | 1995-06-07 | 株式会社トプコン | Ophthalmic measuring device |
| JP2707337B2 (en) * | 1989-09-12 | 1998-01-28 | キヤノン株式会社 | Corneal shape measuring device |
| JP4535580B2 (en) * | 2000-08-09 | 2010-09-01 | 株式会社トプコン | Ophthalmic equipment |
| KR101056960B1 (en) * | 2008-11-25 | 2011-08-16 | 주식회사 휴비츠 | Corneal curvature measuring method to compensate for measurement position error and optometry using the same |
| CN102525402A (en) * | 2012-03-01 | 2012-07-04 | 浙江工业大学 | Optical system and optometry method of computer optometer |
| CN102715886B (en) * | 2012-06-21 | 2014-08-06 | 宁波明星科技发展有限公司 | Corneal curvature calculation method for computerized refractometer |
| CN103340596B (en) * | 2013-07-20 | 2014-08-06 | 太原中北新缘科技中心 | Device and method for measuring corneal curvature |
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