CN104095610A - 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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- CN104095610A CN104095610A CN201410360741.0A CN201410360741A CN104095610A CN 104095610 A CN104095610 A CN 104095610A CN 201410360741 A CN201410360741 A CN 201410360741A CN 104095610 A CN104095610 A CN 104095610A
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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 of measuring human eye diopter and corneal curvature radius of the present invention, relates to optometry imaging measurement technical field, specifically a kind of optical system that can measure human eye diopter and corneal curvature.
Background technology
No matter be in ophthalmology or optician's shop, eye refractometer is all important auxiliary detection medical procedure.Rafractive is as a kind of optometry equipment of objectivity, by launching the infrared light of a branch of specific wavelength, through eyeball organs such as cornea, crystalline lens, aqueous humor, retinas, finally project eyeball retina, then be reflected back in the respective optical system of instrument, then received by CCD, optical signal is converted into the signal of telecommunication, decomposite the data such as concave-sphere, post mirror and axle position, draw the parameter such as refractive diopter of tested eye, correct refractive diopter and interocular distance are more accurately provided for eyeglass.Have that measuring speed is fast, data accuracy is strong, automaticity high.
Cornea is one of important structure of human eye, if each curvature of meridian radius of cornea is inconsistent, will form astigmatism, therefore attaches great importance to clinically the inspection of corneal curvature radius, the inspection of especially front radius of curvature.Contact lens is worn in recent years, and what artificial intraocular lenses's implantation and myopia radial keratotomy were performed the operation carries out, and the inspection of corneal curvature radius is essential especially.Cornea curvimeter is used for measuring anterior surface of cornea curvature, its measuring principle is to place the object of specific size at a precorneal ad-hoc location, this object produces a upright virtual image after anterior surface of cornea reflection, and the size of measuring this picture can calculate the radius of curvature of anterior surface of cornea.
The domestic existing eye refractometer with corneal curvature function, its design principle and precision all do not reach the requirement of national standard, can not meet the need of market.The image that forms the most accurate corneal reflex light in keratometry in the time that tested eyes are just positioned at the focal length place of detecting light path, can calculate accurate corneal curvature value.But shown reflected light image is determined the exact position of tested eyes and is not easy from eye refractometer display.The measuring position of eyes may produce because of eye motion displacement.In addition, determine that the degree of accuracy of measuring position also depends on the skill of survey crew.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, provide a kind of by the method for human eye diopter measurement and the effective combination of keratometry, realize on an eye refractometer and can carry out the measurement of human eye diopter and corneal curvature simultaneously, there is a kind of optical system of measuring human eye diopter and corneal curvature radius that measurement accuracy is high, speed is fast, easy to operate.
The present invention adopts following technical scheme: it comprises that positioning monitoring light path, projecting light path, optical path, mist look light path and keratometry light path common optical elements, four groups of light sources that projection lighting lamp, white light, location illuminating lamp, illuminating lamp form produce reflection of light or refraction by Amici prism one, Amici prism two, dichroic reflector, prism with holes, reflecting mirror respectively, and formation supervision light path, projecting light path, optical path, mist are looked light path and keratometry light path Wu road light path; Wherein:
Illuminating lamp left side, location is provided with location orifice plate, illuminating lamp right side, location is provided with and connects order 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 arranged by connecing order object lens, Amici prism one, dichroic reflector, reflecting mirror, measurement object lens, stain plate, relay objective, image-forming objective lens and diopter measurement imageing sensor order;
Keratometry light path according to bright lamp, aperture, collimator objective, connect order object lens, Amici prism one, Amici 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 order object lens orders and arrange;
Mist depending on optical routing white light, mist depending on image plate, mist depending on object lens, dichroic reflector, Amici prism one, connect order object lens order and rearrange.
Further, described location illuminating lamp is 8 LED uniform on a circle, and the emission wavelength of LED is 940nm.
Further, described location orifice plate is a dark slide that has centre bore, has 8 uniform printing opacity apertures above dark slide, and its position is corresponding with arranging of location illuminating lamp.
Further, described projection lighting lamp is a LED that emission spectra is 850nm.
Further, the emission spectra 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 image plate depending on the white light in light path and mist, is combined into moving cell, can move along optical axis direction simultaneously.
Further, described illuminating lamp is a LED that emission spectra is 950nm.The collimation transmitting light path being formed by illuminating lamp, aperture and collimator objective, uniform in pairs in vertical and horizontal direction.
Further, a pair of wavelength of described Amici prism is that the light of 380nm～780nm and 850nm is high anti-, and the light that is 950nm to wavelength is thoroughly high.
The R:T=1:1 of the light that further, described Amici prism two is 950nm to wavelength.
Further, the light that described dichroic reflector is 380nm～780nm to wavelength is high anti-, and the light that is 950nm to wavelength is thoroughly high.
The present invention has following technique effect compared with technology formerly:
1, the present invention is effectively combined in human eye diopter measurement light path and keratometry light path in an optical system, can in rafractive, realize the accurate measurement of human eye diopter and corneal curvature.
2, in the present invention, adopted mist to look light path, in the time that corneal curvature is tested, the optic nerve of eye to be measured loosens, and reaches best test mode.Adopt positioning monitoring light path, eye to be measured is immobilized to the distance of keratometry light path, can reach like this certainty of measurement more accurately.
Brief description of the drawings
Fig. 1 is optical system structure schematic diagram of the present invention;
Fig. 2 is the schematic diagram of location of the present invention orifice plate;
Fig. 3 is keratometry hot spot schematic diagram of the present invention.
Detailed description of the invention
With face by reference to the accompanying drawings, by embodiment, technical scheme of the present invention is further described specifically, but should limit protection scope of the present invention with this.
As accompanying drawing 1, 2, shown in 3, a kind of optical system that can measure human eye diopter and corneal curvature radius, it comprises positioning monitoring light path, projecting light path, optical path, mist is looked light path and keratometry light path, these five kinds of light path common optical elements, projection lighting lamp 201, white light 301, location illuminating lamp 101, four groups of light sources that illuminating lamp 501 forms are respectively by Amici prism 1, Amici prism 2 106, dichroic reflector 205, prism 204 with holes, reflecting mirror 401 produces reflection of light or refraction, form positioning monitoring light path, projecting light path, optical path, mist is looked light path and keratometry light path Wu road light path.Wherein:
Illuminating lamp 101 left sides, location are provided with location orifice plate 102, illuminating lamp 101 right sides, location are provided with and connect order object lens 104, Amici prism 1, Amici prism 2 106, positioning monitoring object lens 107 and positioning monitoring imageing sensor 108 and form positioning monitoring light path; Amici prism 1 has connected positioning monitoring light path and projecting light path, optical path, mist are looked light path.Amici prism 2 106 has connected positioning monitoring light path and keratometry light path;
Optical path is arranged by connecing order object lens 104, Amici prism 1, dichroic reflector 205, reflecting mirror 401, measurement object lens 402, stain plate 403, relay objective 404, image-forming objective lens 405 and diopter measurement imageing sensor 406 orders;
Keratometry light path according to bright lamp 501, aperture 502, collimator objective 503, connect order object lens 104, Amici prism 1, Amici prism 2 106, diaphragm 504, keratometry object lens 505, keratometry imageing sensor 506 orders and rearrange; Amici prism 106 connects keratometry light path and positioning monitoring 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, connect order object lens 104 order and arrange, dichroic reflector 205 has connected projecting light path and mist is looked light path; Prism 204 with holes has connected optical path and projecting light path;
Mist depending on optical routing white light 301, mist depending on image plate 302, mist depending on object lens 303, dichroic reflector 205, Amici prism 1, connect order object lens 104 and form, dichroic reflector 205 has connected mist and has looked light path and projecting light path, optical path.
As the preferred embodiments of the present invention, described location illuminating lamp 101 is 8 LED uniform on a circle, and the emission wavelength of LED is 940nm; Described location orifice plate 102 is dark slides that have centre bore, has 8 uniform printing opacity apertures above dark slide, and its position is corresponding with arranging of location illuminating lamp.
As the preferred embodiments of the present invention, described projection lighting lamp 201 is the LED that emission spectra is 850nm.
As the preferred embodiments of the present invention, the emission spectra of described white light 301 is 380nm～780nm.
As the preferred embodiments of the present invention, projection lighting lamp 201 in projecting light path and annular graticle 202, relay objective 404 in optical path, mist is fixed on a matrix depending on image plate 302 depending on the white light 301 in light path and mist, be combined into moving cell 601, can move along optical axis direction simultaneously.
As the preferred embodiments of the present invention, described illuminating lamp 501 is the LED that emission spectra is 950nm.The collimation transmitting light path being formed by illuminating lamp 501, aperture 502 and collimator objective 503, uniform in pairs in vertical and horizontal direction.
As the preferred embodiments of the present invention, described one 105 pairs of wavelength of Amici prism are that the light of 380nm～780nm (adopting definite numerical value) and 850nm is high anti-, and the light that is 950nm to wavelength is thoroughly high.
As the preferred embodiments of the present invention, the R:T=1:1 of the light that described 2 106 pairs of wavelength of Amici prism are 950nm; Described dichroic reflector 205 is that the light of 380nm～780nm (adopting definite numerical value) is high anti-to wavelength, and the light that is 950nm to wavelength is thoroughly high.
As shown in accompanying drawing 1,2,3, when work, location illuminating lamp 101 illuminates location orifice plate 102, be formed on 8 luminous round speckles uniform on a circle, these 8 round speckles are irradiated on the cornea of eye 103 to be measured, by corneal reflex, through connecing order object lens 104, Amici prism 1, Amici prism 2 106, positioning monitoring object lens 107, the monitoring picture sensor 108 that is positioned receives, and is formed on round speckle uniform on the circle of certain diameter.When connecing the optical axis of order object lens 104 and the optical axis coincidence of eye to be measured 103, and while meeting a certain designed distance, 8 round speckle imagings are the most clear, and are 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, 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 order object lens 104, be irradiated to eye 103 to be measured, by the fundus reflex of eye 103 to be measured, then through connecing the transmission of order object lens 104, the reflection of Amici prism 1, the transmission of dichroic reflector 205, through the aperture of prism 204 with holes, being reflected mirror 401 reflects, again through measuring object lens 402, stain plate 403, relay objective 404, image-forming objective lens 405, received by diopter measurement imageing sensor 406.Move forward and backward moving cell along optical axis direction, make the imaging of the circular ring of light on diopter measurement sensor 406 the most clear.At this moment, the mist being illuminated by white light 301 is looked the image on image plate 302, looks object lens 303 through mist, the reflection of dichroic reflector 205, and the reflection of Amici prism 1, then be irradiated to eye 103 to be measured through connecing order object lens 104.In the time that the imaging of the circular ring of light on diopter measurement sensor 406 is the most clear, the eye to be measured 103 mist view pictures of seeing are also the most clear, and the optic nerve of eye 103 to be measured is loosened, and reach best test mode.
The position of moving cell 601 under different diopters can be demarcated with standard simulation eye, by measuring the position of moving cell 601, the diopter of eye 103 to be measured can be calculated.
Illuminating lamp 501 in keratometry light path illuminates aperture 502, form collimated light beam through collimator objective 503 and be irradiated to eye 103 to be measured, by the corneal reflex of eye to be measured, through connecing order object lens 104 and Amici prism 1, by Amici prism 2 106 reflections, through diaphragm 504, through keratometry object lens 505, received by keratometry imageing sensor 506.Because 4 collimations that illuminating lamp 501, aperture 502 and collimator objective 503 form are launched light paths, through keratometry light path, on keratometry imageing sensor 506, form 4 circular light spots, by measuring the diameter of 4 circular light spot composition annulus, can calculate the corneal curvature radius of eye 103 to be measured.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.All any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. measure the optical system of human eye diopter and corneal curvature radius for one kind, it is characterized in that: comprise that positioning monitoring light path, projecting light path, optical path, mist look light path and keratometry light path, Qie Zhe five tunnel light path common optical elements, four groups of light sources that projection lighting lamp, white light, location illuminating lamp, illuminating lamp form produce reflection of light or refraction by Amici prism one, Amici prism two, dichroic reflector, prism with holes, reflecting mirror respectively; Wherein:
Illuminating lamp left side, location is provided with location orifice plate, illuminating lamp right side, location is provided with and connects order 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 arranged by connecing order object lens, Amici prism one, dichroic reflector, reflecting mirror, measurement object lens, stain plate, relay objective, image-forming objective lens and diopter measurement imageing sensor order;
Keratometry light path according to bright lamp, aperture, collimator objective, connect order object lens, Amici prism one, Amici 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 order object lens orders and arrange;
Mist depending on optical routing white light, mist depending on image plate, mist depending on object lens, dichroic reflector, Amici prism one, connect order object lens order and arrange.
2. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: described location illuminating lamp is 6-12 LED uniform on a circle, and the emission wavelength of LED is 940nm.
3. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, it is characterized in that: described location orifice plate is a dark slide that has centre bore, above dark slide, have 8 uniform printing opacity apertures, its position is corresponding with arranging of location illuminating lamp.
4. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: described projection lighting lamp is a LED that emission spectra is 850nm.
5. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: the emission spectra of described white light is 380nm～780nm.
6. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, it is characterized in that: relay objective, mist in the projection lighting lamp in projecting light path and annular graticle, optical path are fixed on a matrix depending on image plate depending on the white light in light path and mist, be combined into moving cell, can move along optical axis direction simultaneously.
7. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: described illuminating lamp is a LED that emission spectra is 950nm; The collimation transmitting light path being formed by illuminating lamp, aperture and collimator objective, uniform in pairs in vertical and horizontal direction.
8. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: a pair of wavelength of described Amici prism is that the light of 380nm～780nm and 850nm is high anti-, and the light that is 950nm to wavelength is thoroughly high.
9. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: the R:T=1:1 of the light that described Amici prism two is 950nm to wavelength.
10. a kind of optical system of measuring human eye diopter and corneal curvature radius according to claim 1, is characterized in that: the light that described dichroic reflector is 380nm～780nm to wavelength is high anti-, and the light that is 950nm to wavelength is thoroughly high.
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| CN104905763A (en) * | 2015-06-18 | 2015-09-16 | 苏州四海通仪器有限公司 | Optometry device capable of measuring paracentral defocus |
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| CN110420008A (en) * | 2016-06-30 | 2019-11-08 | 卡尔蔡司光学国际有限公司 | For determining component, computer program, system and the external member of correcting lens |
| CN110420008B (en) * | 2016-06-30 | 2021-12-17 | 卡尔蔡司光学国际有限公司 | Assembly, computer program, system and kit for determining a corrective lens |
| 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 |
| CN110123262A (en) * | 2018-02-08 | 2019-08-16 | 深圳市斯尔顿科技有限公司 | Ophthalmic measurement system and method |
| CN109602389A (en) * | 2018-12-18 | 2019-04-12 | 重庆远视科技有限公司 | A kind of Modularized optical measuring system and optometry equipment |
| CN112060052A (en) * | 2020-09-16 | 2020-12-11 | 宁波市眼科医院 | Robot equipment capable of automatically optometry and corneal curvature detection |
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| TWI822556B (en) * | 2023-01-12 | 2023-11-11 | 張朝凱 | Corneal curvature measurement system and measurement method |
| CN118078203A (en) * | 2024-04-23 | 2024-05-28 | 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 |
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