CN101224103A - Human eye aberration measuring device and method thereof - Google Patents
Human eye aberration measuring device and method thereof Download PDFInfo
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- CN101224103A CN101224103A CNA2008100334083A CN200810033408A CN101224103A CN 101224103 A CN101224103 A CN 101224103A CN A2008100334083 A CNA2008100334083 A CN A2008100334083A CN 200810033408 A CN200810033408 A CN 200810033408A CN 101224103 A CN101224103 A CN 101224103A
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Abstract
The invention discloses a human eye aberration measurement device and the measurement method, which relates to the field of measurement technology; the method firstly uses an optical path which is composed of a Hartmann-Shack wavefront sensor to measure the human eye wavefront aberration, makes use of a Zernike polynomial equation to carry out wavefront reconstruction and obtains the human eye wavefront aberration which is measured objectively by calculation; at the same time, a visual target is used in the same optical path to measure the human eye subjective aberration, so as to obtain the human eye aberration of the subjective measurement based on the judgement of the displayed visual target of the people to be measured; finally, the different weight values are set according to the different ages and genders of the people to be measured, as well as the calculation results of the statistical analysis in the past, the human eye wavefront aberration of the objective measurement and the aberration of the subjective measurement are subject to weighted information fusion according to the set weight values, and the human eye wavefront aberration after the fusion is finally obtained. The method combines the advantages of different measurement methods on the basis of weighted information fusion, which can improve the measurement accuracy of human eye wavefront aberration.
Description
Technical field
The present invention relates to the optometry measuring technique, particularly relate to the technology of a kind of human eyes wave-front optical aberration measurement device and weighted information fusion method thereof.
Background technology
Human eye aberration is measured the history that arranged decades, develops into the measurement of higher order aberratons from the measurement to low order aberration (out of focus, astigmatism) at initial stage, and the method for measurement is also varied.But also there is not a kind of detection method fast and accurately at present, and human eye is as a biological tissue, itself has regulating power, human eye aberration and people's nervous system is also closely related simultaneously, therefore subjective and objective measurement cuts both ways, and does not also have a kind of effective method to measure human eyes wave-front optical aberration fast and accurately at present.Along with the growth at people's age, the physiological status of human eye also changes taking place, and different types of crowd's human eye aberration is also different, and how detecting fast according to the characteristics of different human eyes also becomes a problem to be solved.
Find through literature search prior art, China's patent application number is 200510064863.6, and open day is on October 11st, 2006, and this patent readme is: " the invention provides a kind of human eyesight measuring apparatus; comprising: Optotype presenting apparatus is used to show sighting target; The measured judges reading device, is used to read the judgement of measured to the sighting target of Optotype presenting apparatus demonstration; Control device is used to control Optotype presenting apparatus and shows sighting target, and calculates measurement result according to measured's reaction.By human eyesight measuring apparatus of the present invention, can make eyesight measurement automatization.In addition, the present invention also is applied to eyesight measurement with the theory of modern psychophysical method, the thought of non-level measurement has been proposed, described control device is according to psychophysical method, the control Optotype presenting apparatus shows sighting target and calculates measurement result according to measured's reaction, thereby makes more science, accurate of eyesight measurement result." its weak point is: 1, can only measure, can not reflect the higher order aberratons of human eye the low order aberration of human eye; Though 2 have added psychophysical method, measuring speed is slower; 3, only measure the subjective aberration of human eye, do not considered the objective aberration of human eye.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provides a kind of measure accurate, real-time human eye aberration measuring device and measuring method thereof good and simple in structure.
In order to solve the problems of the technologies described above, a kind of human eye aberration measuring device provided by the present invention, comprise the computer of the information fusion method program that is provided with human eye aberration, connect measuring device and measured's input keyboard of computer respectively, it is characterized in that, wherein the light channel structure in the measuring device is: the laser after laser instrument sends and process collimates is by behind the diaphragm, enter human eye after the reflection of process lasing light emitter spectroscope, and focus on the retina; The retinal reflex laser of human eye through the transmission of lasing light emitter spectroscope, again through first lens focus, passes through the spectroscopical transmission of sighting target again, is refracted as directional light through second lens again, is received by Hartmann-Shack (Shack-Hartmann) pick off at last; Liquid crystal display shows different sighting target signals, by the sighting target lens, again through being imaged onto human eye through first lens and lasing light emitter spectroscope (transmission) after the reflection of sighting target spectroscope; In the time of the Hartmann-Shack sensor, human eye can be observed the sighting target signal on the liquid crystal display.
The measuring method of a kind of described human eye aberration measuring device provided by the present invention is characterized in that, concrete steps are as follows:
1) begin to measure: carry out the measurement that sensor measurement human eye aberration and measured observe sighting target simultaneously, promptly go to step 2 respectively) and step 3);
2) Hartmann-Shack (Shack-Hartmann) sensor measurement human eye aberration: semiconductor laser enters human eye after sending collimated laser light process diaphragm and lasing light emitter spectroscope, and focus on the retina, retinal reflex laser, after passing the telescopic system of lasing light emitter spectroscope and first, second two plus lens compositions, received by the Hartmann-Shack pick off; Can obtain the coefficient of every of Zernike (Ze Nike) multinomial by the wavefront The Fitting Calculation; Go to step 5);
3) demonstration of sighting target and judgement: the computer control liquid crystal display shows the sighting target signal successively, and the measured makes judgement to the direction and the clear degree of sighting target signal, and judged result is imported computer by keyboard by measuring device observation sighting target signal; The measured imports the sighting target that the replacing of back computer control liquid crystal display varies in size or direction is different, till measuring end;
4) COMPUTER CALCULATION obtains the result that the measured observes sighting target: correctness and clear spending according to the measured imports the sighting target direction calculate the out of focus and the scattered-light coefficient of measured's eyes;
5) information fusion of measurement data: according to the crowd of different measured, different sexes difference with set different weights by the statistical analysis of human eye aberration measurement result is in the past calculated, out of focus and scattered-light coefficient and judge that by the measured coefficient that the back COMPUTER CALCULATION obtains is weighted fusion, out of focus after obtaining merging and scattered-light coefficient in the Zernike multinomial coefficient that the Hartmann-Shack sensor measurement is obtained;
6) match of wave front aberration: determined that the polynomial coefficient of Zernike just can be by calculating complete human eyes wave-front optical aberration.
Utilize human eye aberration measuring device provided by the invention and measuring method thereof, because the measuring method that the measurement of adopting sensor measurement human eye aberration and measured to observe sighting target is carried out simultaneously, the measurement of human eye aberration is had measure accurately, real-time is good and characteristic of simple structure, has considered the self regulation of human eye and the influence of psychological factor again; In fusion, also added the factor of the vision characteristics of different crowd, made final measurement more accurate.
Description of drawings
Fig. 1 is the measurement light path sketch map of the embodiment of the invention;
Fig. 2 is the system structure sketch map of the embodiment of the invention;
Fig. 3 is an information fusion schematic flow sheet of the present invention.
The specific embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail; but present embodiment is not limited to the present invention; every employing similar human eye aberration of the present invention is measured weighted information fusion method structure and similar variation thereof, all should list protection scope of the present invention in.
Referring to shown in Figure 2, a kind of human eye aberration measuring device that the embodiment of the invention provided, comprise the computer 14 of the information fusion method program that is provided with human eye aberration, connect measuring device 12 and measured's input keyboard 13 of computer 14 respectively, referring to shown in Figure 1, wherein the light channel structure in the measuring device 12 is: the laser after laser instrument 1 sends and process collimates is by behind the diaphragm 2, through entering human eye 4 after 3 reflections of lasing light emitter spectroscope; The retinal reflex laser of human eye 4 through 3 transmissions of lasing light emitter spectroscope, focuses on through first lens 5 again, passes through sighting target spectroscope 6 (transmission) again, is refracted as directional light through second lens 7 again, is received by Hartmann-Shack pick off 8 at last; Liquid crystal display 10 shows different sighting target signals, by sighting target lens 9, again through being imaged onto human eye 4 through first lens 5 and lasing light emitter spectroscope 3 (transmission) after 6 reflections of sighting target spectroscope, when Hartmann-Shack pick off 8 detected, human eye 4 also can be observed the sighting target on the liquid crystal display.
As shown in Figure 3, the information fusion method of human eye aberration of the present invention, its concrete steps are as follows:
1) begin to measure: carry out the measurement that sensor measurement human eye aberration and measured observe sighting target simultaneously, go to step 2 respectively) and step 3);
2) Hartmann-Shack sensor measurement human eye aberration: according to light path as shown in Figure 1, the laser behind the process collimation that semiconductor laser 1 sends narrows down by diaphragm 2 back light beams, through entering human eye 4 after 3 reflections of lasing light emitter spectroscope; And focus on the retina; The retinal reflex laser of human eye 4, through 3 transmissions of lasing light emitter spectroscope, through the telescopic system of forming by first lens 5 and lens 7, wherein through sighting target spectroscope 6 transmissions between first lens 5 and second lens 7, received by Hartmann-Shack pick off 8 at last, COMPUTER CALCULATION obtains each coefficient of Zernike (Ze Nike); Go to step 5);
3) demonstration of sighting target signal and judgement: computer 14 control liquid crystal displays 10 show the sighting target signal successively, the sighting target signal is by sighting target lens 9, again through be imaged onto measured 11 human eye 4 after the sighting target spectroscope between first lens 5 and second lens 76 reflection through first lens 5 and lasing light emitter spectroscope 3 (transmission), measured 11 is by measuring device 12 observation sighting target signals, and judge and the direction of present demonstration sighting target be input to computer 14 by keyboard 13; Also be input to computer 14 if can not see sighting target clearly by keyboard 13; Measured's 11 input back computers 14 control liquid crystal displays 10 sighting targets that replacing varies in size or direction is different are till measurement finishes;
4) calculate out of focus, scattered-light value: be input to according to the measured computer judgement correctness and can not observe clearly the sighting target situation and calculate, obtain measured's out of focus and scattered-light value;
5) weighting method information fusion: the measured according to all ages and classes section, different sexes and different eyesight status set different weights to the statistical analysis result calculated of different crowd measurement result with passing through in the past, the respective value of judging the Zernike multinomial coefficient that the out of focus calculate and scattered-light value and Hartmann-Shack sensor measurement calculate by sighting target is weighted calculating, obtains the polynomial coefficient of Zernike (please specifying computational process for example) of the correspondence after the weighting;
A typical wave front aberration can be with the Zernike polynomial expansion
Wherein (x y) is wave front aberration to W, and n is a mode coefficient; C
kIt is the Zernike multinomial coefficient; Z
k(x y) is k item Zernike multinomial.Use the wave front aberration of Hartmann-Shack sensor measurement human eye, can calculate C by wavefront reconstruction
k, use C here
0(n, m) expression, the C that calculate this moment
0(n m) is the value that objective approach measures, wherein C
0The value of (2,0) expression out of focus, C
0(2,2) and C
0(2 ,-2) represent scattered-light value.Also can calculate out of focus and scattered-light value by the measured to the judgement of sighting target, use C here respectively
S(2,0), C
S(2,2) and C
S(2 ,-2) are represented.Set weights W according to the measured of all ages and classes section, different sexes and different eyesight status with by the statistical analysis result calculated to the different crowd measurement result in the past
AiAnd W
BiFor example can set the age is W at the child's in 6-12 year weights
A1And W
B1, the teen-age weights of age in 12-18 year are W
A2And W
B2, the young weights of age in 18-24 year are W
A3And W
B3Deng.Determined just can use following formula to be weighted fusion behind the weights:
C
Fi(n，m)＝W
AiC
0(n，m)+W
BiC
S(n，m)
W wherein
Ai+ W
Bi=1
So just can obtain the coefficient C after weighting is merged
Fi(n, m).
6) calculate fusion results: use the Zernike multinomial coefficient after merging to replace original coefficient, the human eyes wave-front optical aberration after obtaining at last merging.
Claims (2)
1. human eye aberration measuring device, comprise the computer of the information fusion method program that is provided with human eye aberration, connect measuring device and measured's input keyboard of computer respectively, it is characterized in that, wherein the light channel structure in the measuring device is: the laser after laser instrument sends and process collimates is by behind the diaphragm, enter human eye after the reflection of process lasing light emitter spectroscope, and focus on the retina; The retinal reflex laser of human eye through the transmission of lasing light emitter spectroscope, again through first lens focus, passes through the spectroscopical transmission of sighting target again, is refracted as directional light through second lens again, is received by the Hartmann-Shack pick off at last; Liquid crystal display shows different sighting target signals, by the sighting target lens, again through after the reflection of sighting target spectroscope through first lens and lasing light emitter spectroscope transmission imaging to human eye; In the time of the Hartmann-Shack sensor, human eye can be observed the sighting target signal on the liquid crystal display.
2. the measuring method of the described human eye aberration measuring device of claim 1 is characterized in that concrete steps are as follows:
1) begin to measure: carry out the measurement that sensor measurement human eye aberration and measured observe sighting target simultaneously, promptly go to step 2 respectively) and step 3);
2) Hartmann-Shack sensor measurement human eye aberration: semiconductor laser enters human eye after sending collimated laser light process diaphragm and lasing light emitter spectroscope, and focus on the retina, retinal reflex laser, after passing the telescopic system of lasing light emitter spectroscope and first, second two plus lens compositions, received by the Hartmann-Shack pick off; Can obtain the coefficient of every of Zernike multinomial by the wavefront The Fitting Calculation; Go to step 5);
3) demonstration of sighting target and judgement: the computer control liquid crystal display shows the sighting target signal successively, and the measured makes judgement to the direction and the clear degree of sighting target signal, and judged result is imported computer by keyboard by measuring device observation sighting target signal; The measured imports the sighting target that the replacing of back computer control liquid crystal display varies in size or direction is different, till measuring end;
4) COMPUTER CALCULATION obtains the result that the measured observes sighting target: correctness and clear spending according to the measured imports the sighting target direction calculate the out of focus and the scattered-light coefficient of measured's eyes;
5) information fusion of measurement data: according to the crowd of different measured, different sexes difference with set different weights by the statistical analysis of human eye aberration measurement result is in the past calculated, out of focus and scattered-light coefficient and judge that by the measured coefficient that the back COMPUTER CALCULATION obtains is weighted fusion, out of focus after obtaining merging and scattered-light coefficient in the Zernike multinomial coefficient that the Hartmann-Shack sensor measurement is obtained;
6) match of wave front aberration: determined that the polynomial coefficient of Zernike just can be by calculating complete human eyes wave-front optical aberration.
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| CN101963543A (en) * | 2010-08-19 | 2011-02-02 | 上海理工大学 | System and method for testing lens parameters based on Hartmann-Shark sensor |
| CN102307514A (en) * | 2008-12-01 | 2012-01-04 | 梁俊忠 | Methods and devices for refractive correction of eyes |
| CN103997949A (en) * | 2011-10-17 | 2014-08-20 | 卡尔蔡司光学国际有限公司 | Statistical autorefractor |
| CN105611869A (en) * | 2013-04-29 | 2016-05-25 | 卡尔蔡司光学国际有限公司 | Method and system for determining the refractive properties of an eye of a child |
| CN107788946A (en) * | 2016-09-05 | 2018-03-13 | 尼德克株式会社 | Subjective formula optometry equipment and subjective formula optometry program |
| EP3298950A3 (en) * | 2016-09-05 | 2018-06-13 | Nidek Co., Ltd | Subjective optometry apparatus and subjective optometry program |
| CN109512380A (en) * | 2018-11-02 | 2019-03-26 | 爱尔眼科医院集团股份有限公司 | The method for making full retina dioptric topographic map based on wavefront sensing technique |
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| CN102307514A (en) * | 2008-12-01 | 2012-01-04 | 梁俊忠 | Methods and devices for refractive correction of eyes |
| CN102307514B (en) * | 2008-12-01 | 2015-07-22 | 完美视觉科技（香港）有限公司 | Methods and devices for refractive correction of eyes |
| CN101963543A (en) * | 2010-08-19 | 2011-02-02 | 上海理工大学 | System and method for testing lens parameters based on Hartmann-Shark sensor |
| CN103997949A (en) * | 2011-10-17 | 2014-08-20 | 卡尔蔡司光学国际有限公司 | Statistical autorefractor |
| EP2779889A1 (en) * | 2011-10-17 | 2014-09-24 | Carl Zeiss Vision, Inc. | Statistical autorefractor |
| EP2779889A4 (en) * | 2011-10-17 | 2015-09-09 | Zeiss Carl Vision Inc | Statistical autorefractor |
| US9468371B2 (en) | 2011-10-17 | 2016-10-18 | Carl Zeiss Vision International Gmbh | Statistical autorefractor |
| US10881292B2 (en) | 2013-04-29 | 2021-01-05 | Carl Zeiss Vision International Gmbh | Method and system for determining the refractive properties of an eye of a child |
| CN105611869A (en) * | 2013-04-29 | 2016-05-25 | 卡尔蔡司光学国际有限公司 | Method and system for determining the refractive properties of an eye of a child |
| CN108968906B (en) * | 2013-04-29 | 2021-07-09 | 卡尔蔡司光学国际有限公司 | Method and system for determining the refractive properties of a child's eye |
| CN108968906A (en) * | 2013-04-29 | 2018-12-11 | 卡尔蔡司光学国际有限公司 | For determining the method and system of the ametropia characteristic of the eyes of children |
| CN107788946A (en) * | 2016-09-05 | 2018-03-13 | 尼德克株式会社 | Subjective formula optometry equipment and subjective formula optometry program |
| US10264967B2 (en) | 2016-09-05 | 2019-04-23 | Nidek Co., Ltd. | Subjective optometry apparatus and subjective optometry program |
| EP3298950A3 (en) * | 2016-09-05 | 2018-06-13 | Nidek Co., Ltd | Subjective optometry apparatus and subjective optometry program |
| CN107788946B (en) * | 2016-09-05 | 2022-02-11 | 尼德克株式会社 | Subjective optometry device and subjective optometry program |
| CN109512380A (en) * | 2018-11-02 | 2019-03-26 | 爱尔眼科医院集团股份有限公司 | The method for making full retina dioptric topographic map based on wavefront sensing technique |
| CN113197543A (en) * | 2021-05-06 | 2021-08-03 | 南开大学 | Method and system for evaluating vision quality after refractive surgery based on vector aberration theory |
| CN113197543B (en) * | 2021-05-06 | 2023-02-28 | 南开大学 | Method and system for evaluating vision quality after refractive surgery based on vector aberration theory |
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