CN201234974Y - Compensating device for measuring and correcting human eye wave front aberration - Google Patents
Compensating device for measuring and correcting human eye wave front aberration Download PDFInfo
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- CN201234974Y CN201234974Y CNU2008200570132U CN200820057013U CN201234974Y CN 201234974 Y CN201234974 Y CN 201234974Y CN U2008200570132 U CNU2008200570132 U CN U2008200570132U CN 200820057013 U CN200820057013 U CN 200820057013U CN 201234974 Y CN201234974 Y CN 201234974Y
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Abstract
本实用新型涉及一种用于人眼波前像差测量及矫正的补偿装置，包括调焦系统、离焦补偿系统，调焦系统包括扩束透镜、准直透镜和精密电控平移台，准直透镜固定在精密电控平移台的可移动端；离焦补偿系统由一望远系统和精密电控平移台构成，其中精密电控平移台设置在望远系统的两透镜之间，并与计算机控制系统相连；离焦补偿系统中的精密电控平移台上还装有四块反射镜，其中两块反射镜固定在精密电控平移台的固定端，另两块反射镜固定在精密电控平移台的可移动端。本实用新型与现有技术相比有很大的完善；对比插片式的补偿方式，更具有连续性，可以不受限制的对任何大小的离焦量进行矫正；与手动式平移台相比具有精确、速度快、移动量确定等优点。
The utility model relates to a compensation device for measuring and correcting human eye wave front aberration, which comprises a focus adjustment system and a defocus compensation system. The lens is fixed on the movable end of the precision electronically controlled translation stage; the defocus compensation system is composed of a telescopic system and a precise electronically controlled translation platform, wherein the precision electronically controlled translation platform is set between the two lenses of the telescopic system, and is connected with the computer control system connected; the precision electronically controlled translation platform in the defocus compensation system is also equipped with four mirrors, two of which are fixed on the fixed end of the precision electronically controlled translation platform, and the other two mirrors are fixed on the precision electronically controlled translation platform removable terminal. Compared with the prior art, the utility model has great improvement; compared with the insert type compensation method, it is more continuous, and can correct any defocus amount without limitation; compared with the manual translation stage It has the advantages of precision, fast speed and definite movement amount.
Description
Technical field
This utility model relates to a kind of medical checkout equipment, in particular for human eyes wave-front optical aberration measurement and corrigent device.
Background technology
Eyes are that the mankind obtain the most important approach of external information, because internal structure is complicated and changeable, there are a large amount of wave front aberrations in human eye.Accurately measure human eye aberration and carry out refraction correction surgery to instructing the ophthalmologist, the image quality that improves human eye is significant.The individuation cutting needs very high accuracy to control laser cutting accurately in operation.Therefore in " individuation " cornea refractive surgery of wave front aberration guiding, the accurate measurement and the rectification of wave front aberration are vital.
Human eyes wave-front optical aberration measurement and apparatus for correcting are to utilize the adaptive optics principle, and the amphiblestroid wave front aberration in human eye optical fundus is measured and corrigent medical apparatus and instruments accurately.Inject ophthalmic with a branch of semiconductor laser from pupil in the measuring process, the light that scatters through the human eye optical fundus is attended by the wave front aberration of human eye, measures this aberration with Hartmann sensor, and directs variable shape reflecting mirror is corrected this aberration.
In human eyes wave-front optical aberration measurement, except measuring, can also measure the multinomial higher order aberratons that has a strong impact on visual quality in the human eye, thereby obtain than the more accurate measurement result of common optometry to the human eye low order aberration that common spectacles promptly can compensate.But concerning the human eye near-sighted, that hyperopia degree is very big, since Beacon Point be by semiconductor laser after a branch of small-bore directional light after the beam-expanding collimation optical system is by observed human eye pupil in the film formed bright spot of human eye optical fundus view, therefore human eye aberration has a direct impact the shape and the size of optical fundus Beacon Point, because the laser beam bore by the human eye pupil is little, the human eye of twenty-twenty vision aberration in small-bore is less, influence to the optical fundus Beacon Point is little, but the aberration of the human eye of ametropia eyesight abnormality in small-bore just has tangible influence to the optical fundus Beacon Point.For myopia or the very big human eye of hyperopia degree, beacon beam does not focus on the human eye retina after injecting the human eye pupil, but focuses on retina the place ahead or rear, no longer is directional light from the scattering of human eye optical fundus by the light that pupil penetrates.Therefore when this human eye was carried out wave-front optical aberration measurement, the detected signal of Hartmann sensor was very faint, can have a strong impact on the certainty of measurement of human eye aberration like this.
In the human eyes wave-front optical aberration correcting process, except correcting, can also correct the multinomial higher order aberratons that has a strong impact on visual quality in the human eye, thereby obtain than the better rectification effect of common spectacles to the human eye low order aberration that common spectacles can compensate.For deformation reflection mirror, can only correct less defocusing amount, the human eye very big to defocusing amount, deformation reflection mirror can't be finished rectification.The deformation reflection mirror that proves the native system use by experiment can only be corrected with interior defocusing amount by right ± 1.5D, surpasses the out of focus of this numerical value, and deformation reflection mirror can't be corrected.In addition, the major part of the deformation reflection mirror ability of correcting all is used for correcting this available common spectacles just can corrigent low order aberration, also is unnecessary waste.If taking certain indemnifying measure corrects defocusing amount in advance, the deflection of the deformation reflection mirror that native system is used just can be little a lot, not only can improve the rectification precision of deformable mirror, can also reduce design and difficulty of processing, thereby help reducing manufacturing cost.
Above-mentioned two kinds of problems have been carried out preliminary solution both at home and abroad at present.In patent " the precompensation device of living human eye retina cell imager ", adopting the fixed slot of the concave-sphere compensating plate that is provided for installing the compensation human eye in the side nearby of human eye carriage is the blade inserting penalty method, and the defocusing amount of human eye is carried out precompensation.This application number is 200420060165.X.And the modes of organizing before using the manual translation platform to change in other relevant patents between focusing lens and the back group focusing lens such as distance are carried out precompensation and rectification to human eyes wave-front optical aberration.But the compensation precision of blade inserting penalty method is limited, because the minimum number of degrees of most of eyeglass are 25 degree.Adopt the method for manual platform, speed, precision all are very limited, and amount of movement also is difficult to accurate Calculation simultaneously.
Summary of the invention
This utility model is that a kind of human eyes wave-front optical aberration measurement and corrigent compensation arrangement of being used for will be provided, this device is applied to accurate electronic control translation stage in the focusing system and defocusing compensation system in this device, by focusing system the defocusing amount of eyesight abnormality human eye is carried out precompensation, make beacon luminous energy focus on the retina of measured human eye accurately, improve optical fundus Beacon Point quality, and then improve the certainty of measurement of human eye aberration; By by the defocusing compensation system, the defocusing amount in the detected human eye aberration of Hartmann is carried out precision correct, thereby the rectification precision of raising deformable mirror reduces the deformation reflection mirror timing to the deflection requirement, and the instrument and equipment manufacturing cost is reduced.
The technical solution of the utility model is as follows:
A kind of human eyes wave-front optical aberration measurement and corrigent compensation arrangement of being used for, comprise focusing system, defocusing compensation system, be characterized in: focusing system comprises extender lens, collimating lens and accurate electronic control translation stage, wherein collimating lens is fixed on the movable terminal of accurate electronic control translation stage, and accurate electronic control translation stage links to each other with computer control system; Collimating lens is realized the focusing function of focusing system along with move jointly the mobile terminal of computer-controlled translation stage; The defocusing compensation system is arranged between spectroscope and the deformable mirror, and is made of a telescopic system and accurate electronic control translation stage, and wherein accurate electronic control translation stage is arranged between two lens of telescopic system, and links to each other with computer control system; On the accurate electronic control translation stage four reflecting mirrors are housed also, wherein two reflecting mirrors are fixed on the stiff end of accurate electronic control translation stage, other two reflecting mirrors are fixed on the movable terminal of accurate electronic control translation stage, and mobile jointly with computer-controlled accurate electronic control translation stage mobile terminal, change the optical distance between two lens.
Accurate electronic control translation stage stroke is 100mm in the defocusing compensation system.
The beneficial effects of the utility model are: accurate electronic control translation stage is applied in focusing system and the defocusing compensation system, in whole device, only just can realize focusing and defocusing compensation function by mobile electronic control translation stage, do not need any other optics original paper in the mobile device, by focusing system the defocusing amount of eyesight abnormality human eye is carried out precompensation, make beacon luminous energy focus on the retina of measured human eye accurately, improve optical fundus Beacon Point quality, and then improve the certainty of measurement of human eye aberration;
Use the defocusing compensation device that the detected human eye defocusing amount of Hartmann sensor is carried out precision and correct, thereby the rectification precision of raising deformable mirror reduces the deformation reflection mirror timing to the deflection requirement, and the instrument and equipment manufacturing cost is reduced.The adding of electronic control translation stage has increased the stability of system, and easy to operate.Make the mobile accuracy of translation stage reach micron dimension by computer control simultaneously, and then improved human eye aberration greatly and measured and correct precision.
This utility model compared with prior art has very big perfect; The compensation way of contrast blade inserting has more seriality, can unrestricted defocusing amount to any size correct; Compare with the manual type translation stage and advantage such as to have accurately, speed is fast, amount of movement is definite.
Description of drawings
Fig. 1 is the index path of human eyes wave-front optical aberration measurement of the present utility model and correction system;
Fig. 2 is the bucking-out system program control flow chart.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is described in further detail.
As shown in Figure 1, human eyes wave-front optical aberration measurement and correction system comprise the beacon light source 1 that is made of the LD semiconductor laser, focusing system 2, reflecting mirror 3, spectroscope 4, measured human eye 5, defocusing compensation system 6, deformable mirror 7, No. two reflecting mirrors 8, bore matching system 9, Hartmann sensor 10, computer 11, high-voltage amplifier 12.
This utility model is for being used for human eyes wave-front optical aberration measurement and corrigent compensation arrangement, is arranged on by beacon light source 1, focusing system 2, defocusing compensation system 6, measures aberrations control and guiding deformation reflection mirror according to Hartmann wave front sensor 10 this aberration is carried out in the human eyes wave-front optical aberration measurement and correction system that corrigent optics Adaptable System forms.
(1) focusing system is made up of extender lens L1, collimating lens L2 and accurate electronic control translation stage, and this system can carry out precompensation to the defocusing amount of human eye.Wherein collimating lens L2 is fixed on the movable terminal on the translation stage, by computer control system 11 controls.Focus by controlling these translation stage collimation lens, and then realize the focusing function of focusing system, make beacon beam can accurately focus on the retina place of measured human eye 5, improve the certainty of measurement of human eye 5 aberrations.
(2) add defocusing compensation system 6 between spectroscope 4 and deformable mirror 7, this system is made of a telescopic system and accurate electronic control translation stage.Wherein accurate translation stage is arranged on two lens L3 of telescopic system, between the L4, by computer 11 controls, moves accurate electronic control translation stage, and the defocusing amount of observed human eye is corrected.Deformation reflection mirror 7 is only corrected other aberrations of removing out of focus in the human eye aberration, makes the rectification effect of human eye aberration better, precision is higher.Also greatly reduce simultaneously the requirement of deformation reflection mirror 7 correcting unit deflections, make design, manufacturing and the processing of wave-front corrector easier, manufacturing cost reduces.
(3) in whole device, only just can realize the defocusing amount precompensation and the correcting function of measured human eye by mobile electronic control translation stage.Do not need any other optics original paper in the mobile device.Not only can conveniently control but also can strengthen the stability of whole system by the method.Make the mobile accuracy of translation stage reach micron dimension by computer control simultaneously, and then improved human eye aberration greatly and measured and corrigent precision.
Operation principle of the present utility model is (as Fig. 1, so 2): the beacon beam that the beacon light source 1 that is made of the LD semiconductor laser sends, expand bundle, collimation by extender lens L1 in the focusing system 2 and collimating lens L2, after reflecting mirror 3 reflections, enter the pupil of human eye 5 again through spectroscope 4 reflections; The beacon beam of observed human eye 5 optical fundus scatterings sees through spectroscope and sees through defocusing compensation system 6 again, through deformation reflection mirror 7 reflections, by No. two reflecting mirror 8 reflections, 'go'gage matching system 9 enters Hartmann wave front sensor 10 again, Hartmann sensor 10 is delivered to Control Computer 11 with the error signal that records, observe the image of the signal that Hartmann sensors 10 receive, i.e. human eyes wave-front optical aberration hot spot dot chart by computer 11.Electronic control translation stage in the mobile focusing system 2, the hot spot dot chart of human eye is the most clear in display, carries out the measurement and the rectification of human eyes wave-front optical aberration then.Beacon beam by beacon light source 1 sends by focusing system 2, after reflecting mirror 3 reflections, is reflected into the pupil of human eye again through spectroscope; The beacon beam of observed human eye 5 optical fundus scatterings sees through spectroscope and sees through defocusing compensation system 6 again, through deformation reflection mirror 7 reflections, by No. two reflecting mirror 8 reflections, 'go'gage matching system 9 enters Hartmann wave front sensor 10 again, Hartmann sensor 10 is delivered to Control Computer 11 with the error signal that records, computer 11 converts the defocusing amount in the aberration to corresponding displacement, switching value outfan by computer 11 capture cards sends pulse signal to sub-circuit then, the motor that sub-circuit will drive translation stage moves, thereby the defocusing amount that Hartmann wave front sensor 10 records is corrected.Computer 11 again with except the defocusing amount other aberrations be processed into control signal, control signal is applied on the deformation reflection mirror 7, thereby the wave front aberration of human eye is corrected after sending high-voltage amplifier 12 to amplify.
Accurate electronic control translation stage stroke is 100mm in defocusing compensation system 6.On the accurate electronic control translation stage four mirror M 1, M2, M3, M4 are housed.Wherein mirror M 1, and the end that M2 is arranged on translation stage maintains static, and with mirror M 3, M4 is fixed on the movable terminal of translation stage, and by computer 11 control mirror M 3, M4 is along with move jointly the mobile terminal of accurate electronic control translation stage.Thereby change the optical distance between extender lens L1 and the collimating lens L2.In the system design, use 32 sub-circuits to control the motor of accurate electronic control translation stage, send pulse signal to sub-circuit, control moving of translation stage by computer 11 capture cards.Use VB that capture card is programmed and realize translation stage control.
Bucking-out system 6 programme-control processes are as shown in Figure 2: begin to measure, convert the detected defocusing amount of Hartmann sensor to corresponding displacement, move by the computer control translation stage, detected defocusing amount is corrected.Continuation detects with Hartmann sensor, if out of focus is non-vanishing in the aberration, continues mobile electronic control translation stage, and defocusing amount is corrected; If out of focus is zero in the aberration, stop mobile electronic control translation stage, quit a program.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200570132U CN201234974Y (en) | 2008-04-08 | 2008-04-08 | Compensating device for measuring and correcting human eye wave front aberration |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200570132U CN201234974Y (en) | 2008-04-08 | 2008-04-08 | Compensating device for measuring and correcting human eye wave front aberration |
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| CN201234974Y true CN201234974Y (en) | 2009-05-13 |
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| CNU2008200570132U Expired - Fee Related CN201234974Y (en) | 2008-04-08 | 2008-04-08 | Compensating device for measuring and correcting human eye wave front aberration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102283631A (en) * | 2010-08-12 | 2011-12-21 | 中国科学院光电技术研究所 | A Hartmann dynamic aberration measuring instrument that can induce the human eye to adjust automatically |
| CN103052368A (en) * | 2010-07-20 | 2013-04-17 | 约翰霍普金斯大学 | Surface tracking and motion compensating surgical tool system |
-
2008
- 2008-04-08 CN CNU2008200570132U patent/CN201234974Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052368A (en) * | 2010-07-20 | 2013-04-17 | 约翰霍普金斯大学 | Surface tracking and motion compensating surgical tool system |
| CN103052368B (en) * | 2010-07-20 | 2016-01-20 | 约翰霍普金斯大学 | surface tracking and motion compensation surgical tool system |
| CN102283631A (en) * | 2010-08-12 | 2011-12-21 | 中国科学院光电技术研究所 | A Hartmann dynamic aberration measuring instrument that can induce the human eye to adjust automatically |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20100408 |