CN117204805A - Objective analysis optical system for analyzing visual quality - Google Patents
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Abstract
The present invention relates to an objective analysis optical system for analyzing visual quality, comprising: a Hartmann wavefront aberration detection light path module and a point diffusion image acquisition light path module; the Hartmann wavefront aberration detection light path module is used for receiving fundus reflected light of the eye to be detected and preliminarily calculating a refraction value D according to the position of the light spot array in the second image sensor; and accurately calculating wavefront aberration according to the received light spot array image; the point diffusion image acquisition light path module is used for receiving fundus reflection light of the eye to be detected and obtaining point diffusion images of the eye to be detected under the condition of scotopic vision and the condition of photopic vision; and according to the wavefront aberration, calculating a calculated value of the point spread function diagram, comparing the calculated value with the actually acquired point spread image, and analyzing the visual quality of the eye to be measured. The invention can accurately evaluate the visual quality of human eyes.
Description
Technical Field
The invention relates to the technical field of optical instruments for computer optometry, in particular to an objective analysis optical system for analyzing vision quality.
Background
Visual quality is a higher level concept than vision, and the evaluation of definition (contrast sensitivity) is increased on the basis of vision, so that the capability of the human eyes to observe objects can be comprehensively reflected.
Currently mainstream computerized optometry devices can only detect myopia/hyperopia (defocus) and astigmatism of the human eye. In recent years, the human eye wavefront aberration measuring technology can calculate an optical transfer function, a point spread function and the like of a human eye according to the objectively measured wavefront aberration, so that the evaluation capability of visual functions is improved.
Although the point spread function can be calculated through Hartmann wavefront aberration data, the wavefront aberration is only estimated from the angle of aberration, and the influence of light scattering of media such as cataract of human eyes or vitreous opacity is not considered, so that accurate visual quality analysis results cannot be given to people with cataract or vitreous opacity to a certain extent.
In addition, with the development of technology, the multifocal intraocular lens becomes the best means for treating severe cataract, and the multifocal intraocular lens can be used for clearly observing objects at a short distance and a long distance, but the Hartmann wavefront aberration detection technology cannot be suitable for eye measurement of a person implanted with the multifocal intraocular lens.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned drawbacks and deficiencies of the prior art, the present invention provides an objective analysis optical system for analyzing visual quality, which solves the technical problem that an accurate visual quality analysis result cannot be given to a human eye having a certain degree of cataract or vitreous opacity and a human eye implanted with a multifocal intraocular lens at present.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
in a first aspect, an embodiment of the present invention provides an objective analysis optical system for analyzing visual quality, including: a Hartmann wavefront aberration detection light path module and a point diffusion image acquisition light path module;
the Hartmann wavefront aberration detection light path module is used for receiving fundus reflected light of the eye to be detected through the second image sensor and preliminarily calculating a refraction value D according to the position of the light spot array in the second image sensor; after the relative position of the moving component of the objective analysis optical system is adjusted according to the refraction value D to carry out defocus compensation, the wavefront aberration is accurately calculated according to the light spot array image received by the second image sensor;
the point diffusion image acquisition light path module is used for receiving fundus reflected light of the eye to be detected through the first image sensor after adjusting the relative position of the moving component of the objective analysis optical system according to the refraction value D to carry out defocus compensation, so as to obtain a point diffusion image of the eye to be detected under the condition of scotopic vision; the method is also used for obtaining a point spread image of the eye to be measured under the photopic vision condition under the condition of high brightness; and according to the wave front aberration, calculating to obtain a calculated value of the point spread function chart through Fourier transformation, comparing the calculated value with the actually acquired point spread image, and analyzing the visual quality of the eye to be measured.
The objective analysis optical system for analyzing visual quality provided by the embodiment of the invention comprehensively utilizes the Hartmann wavefront aberration detection technology and the point diffusion image direct detection technology, can accurately evaluate the visual quality of human eyes, can be suitable for the human eyes with a certain degree of cataract or vitreous opacity and the human eyes implanted with multifocal artificial lenses, and can give accurate visual quality analysis results.
Optionally, the method further comprises: the system comprises a peripheral imaging light path module, a sighting target light path module and a single-point illumination light path module;
the peripheral imaging light path module is used for integrally imaging the eye to be measured under the low-brightness condition and is used for monitoring and adjusting the relative position of the objective analysis optical system and the eye to be measured according to the refraction value D so as to realize alignment;
the optotype light path module is used for projecting a pattern of the target into the tested eye through target transmission light transmitted by the target;
the single-point illumination light path module is used for projecting the measuring light beam emitted by the measuring light source into the eye to be measured;
optionally, the peripheral imaging optical path module includes: the system comprises a first illumination light source, a second illumination light source, a lens, a first light splitting sheet, a first focusing lens and an area array image sensor;
the first illumination light source and the second illumination light source illuminate the periphery of the eye to be measured, and the reflected light of the periphery of the eye is focused by the eye lens, transmitted by the first light splitting sheet and focused by the first focusing lens to form an image on the area array image sensor.
The optotype light path module includes: a first mirror, a second focusing lens, a target, and a third illumination source;
the light emitted by the third illumination light source illuminates the target, and the target transmitted light is reflected by the second focusing lens, the first reflecting mirror and the first light splitting sheet in sequence and then projected into the eye to be tested through the eye receiving lens.
Optionally, the target is a semitransparent material with a color pattern; the target and the third illumination light source can synchronously move back and forth, and the relative position between the target and the third illumination light source is unchanged in the moving process.
Optionally, a second beam splitter is further arranged between the eye lens and the first focusing lens; the light reflected by the periphery of the eye is focused by the eye lens, transmitted by the first light splitting sheet and the second light splitting sheet and focused by the first focusing lens;
the single-point illumination light path module includes: the device comprises a deflection mirror, a middle lens, a first beam splitter prism, a second reflecting mirror, a fourth focusing lens, a second collimating lens and a measuring light source;
the measuring light source is arranged at the back focus of the second collimating lens, and the emitted measuring light beam is collimated into parallel light by the second collimating lens; then reflected by the fourth focusing lens and the second reflecting mirror, reflected by the first beam splitter prism for the second time, subjected to divergence angle adjustment by the middle lens, reflected by the deflection mirror for the third time and reflected by the second beam splitter for the fourth time, and projected into the eye to be measured by the eye lens.
Optionally, the Hartmann wavefront aberration detection light path module comprises a lens, a second beam splitter, a deflection mirror, a middle lens, a first beam splitter prism, a second beam splitter prism, a third reflector, a third collimating lens, a micro lens array and a second image sensor;
after the measuring light beam emitted by the measuring light source is projected into the eye to be measured, fundus reflected light of the eye to be measured is emitted through pupils, is converged through the eye receiving lens, is reflected through the second beam splitter, is reflected through the deflection mirror for the second time, is focused through the middle lens, is transmitted through the first beam splitter prism, is reflected for the third time through the second beam splitter prism, is reflected for the fourth time through the third reflecting mirror, is collimated through the third collimating lens, is projected onto the micro lens array, and is received by the second image sensor after being split and focused through the micro lens array.
Optionally, the point spread image acquisition optical path module includes: the optical system comprises a receiving lens, a second light-splitting piece, a deflection mirror, a middle lens, a first light-splitting prism, a second light-splitting prism, a first collimating lens, a third focusing lens and a first image sensor;
after the measuring light beam emitted by the measuring light source is projected into the eye to be measured, the fundus reflected light of the eye to be measured is emitted through the pupil, and then is converged through the eye receiving lens, reflected through the second beam splitter, reflected for the second time by the deflection mirror, focused through the middle lens, transmitted through the first beam splitter prism, transmitted through the second beam splitter prism, collimated through the first collimating lens, focused through the third focusing lens and imaged in the first image sensor.
Optionally, the deflection mirror is a mirror whose angle can be periodically changed by the oscillation of the mirror surface, and the period of the change of the angle is less than 10ms; the change range of the angle is 1-5 degrees; the installation position of the deflection mirror and the position of the micro lens array are conjugate with the pupil forming object image of the tested eye.
Optionally, the first light splitting prism is a polarizing light splitting prism; the polarization directions of the reflected light and the transmitted light of the first light splitting prism are mutually perpendicular; the second beam splitter prism is a proportional beam splitter prism, and the ratio of the light intensity of the reflected light to the light intensity of the transmitted light of the second beam splitter prism is 2-5.
Optionally, the system further comprises a moving sliding table, and the third illumination light source, the target, the fourth focusing lens and the first collimating lens are driven by the moving sliding table to synchronously move to form a moving assembly of the objective analysis optical system together.
Advantageous effects
The beneficial effects of the invention are as follows: the objective analysis optical system for analyzing visual quality disclosed by the invention comprehensively utilizes the Hartmann wavefront aberration detection technology and the point spread image direct detection technology, and can accurately evaluate the visual quality of human eyes; by adjusting the optotype light, the bright field and dark field visual quality can be evaluated.
Drawings
FIG. 1 is a schematic structural view of an objective analysis optical system for analyzing visual quality according to a preferred embodiment of the present invention;
FIG. 2 is a light spot diagram of wavefront sensing according to a preferred embodiment of the present invention; FIG. 2 (a) is a plot of the spot of wavefront sensing at the time of ametropia; FIG. 2 (b) is a plot of the spot of a wavefront measurement in the presence of refractive errors;
fig. 3 is a point spread image of a preferred embodiment of the present invention.
[ reference numerals description ]
1. An eye to be tested; 3. a contact lens; 4. a first beam splitter; 5. a second light splitting sheet; 6. a first focusing lens; 7. an area array image sensor; 8. a first mirror; 9. a second focusing lens; 10. a target; 11. a third illumination source; 12. a deflection mirror; 13. an intermediate lens; 14. a first beam-splitting prism; 15. a second light splitting prism; 16. a first collimating lens; 17. a third focusing lens; 18. a first image sensor; 19. a second mirror; 20. a fourth focusing lens; 21. a second collimating lens; 22. measuring a light source; 23. a third mirror; 24. a third collimating lens;
25. a microlens array; 26. a second image sensor; 27. moving the sliding table; 28. a motor;
201. a first illumination source; 202. and a second illumination source.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An objective analysis optical system for analyzing visual quality according to an embodiment of the present invention includes: the system comprises a peripheral imaging light path module, a sighting target light path module, a single-point illumination light path module, a Hartmann wavefront aberration detection light path module and a point diffusion image acquisition light path module. Wherein:
the peripheral imaging light path module is used for integrally imaging the tested eye 1 under the low-brightness condition and is used for monitoring and adjusting the relative position of the objective analysis optical system and the tested eye 1 according to the refraction value D so as to realize alignment;
a optotype light path module for projecting a pattern of the target 10 into the eye 1 to be measured by target transmission light transmitted through the target 10;
the single-point illumination light path module is used for projecting the measuring light beam emitted by the measuring light source 22 into the measured eye 1;
the Hartmann wavefront aberration detection light path module is used for receiving fundus reflection light of the eye 1 to be detected through the second image sensor 26 and preliminarily calculating a refraction value D according to the position of the light spot array in the second image sensor 26; after the relative position of the moving component of the objective analysis optical system is adjusted according to the refraction value D to carry out defocus compensation, the wavefront aberration is accurately calculated according to the spot array image received by the second image sensor 26;
the point spread image acquisition light path module is used for receiving fundus reflection light of the tested eye 1 through the first image sensor 18 after the relative position of the moving component of the objective analysis optical system is adjusted according to the refraction value D to carry out defocus compensation, so as to obtain a point spread image of the tested eye 1 under the condition of scotopic vision; also used for obtaining the point spread image of the tested eye 1 under the photopic vision condition under the condition of high brightness; according to the wavefront aberration, a calculated value of a point spread function diagram is obtained through Fourier transformation calculation, and compared with an actually acquired point spread image, the vision quality of the tested eye 1 is analyzed.
The structure comprehensively utilizes the Hartmann wavefront aberration detection technology and the point spread image direct detection technology, and can accurately evaluate the vision quality of human eyes; by adjusting the optotype light (brightness), the bright field and dark field visual quality can be evaluated.
In the implementation, in order to adjust the relative position of the objective analysis optical system and the tested eye 1, the objective analysis optical system is further provided with an electric control moving sliding table, and the motor 28 drives the moving sliding table 27 to translate back and forth, so as to adjust the relative position of the objective analysis optical system and the tested eye 1.
In practice, the peripheral imaging optical path module includes: a first illumination light source 201, a second illumination light source 202, an ocular lens 3, a first beam splitter 4, a second beam splitter 5, a first focusing lens 6, and an area array image sensor 7; the first illumination light source 201 and the second illumination light source 202 illuminate the periphery of the eye 1 to be measured, and the reflected light of the periphery of the eye is focused by the ocular lens 3, transmitted by the first light-splitting sheet 4 and the second light-splitting sheet 5, and focused by the first focusing lens 6 on the area array image sensor 7 for imaging. Preferably, the first illumination light source 201 and the second illumination light source 202 are near infrared LED light sources, and the light source wavelength is 750-1000 nm, preferably 750-800 nm.
In practice, the optotype light path module includes: a ocular lens 3, a first beam splitter 4, a first mirror 8, a second focusing lens 9, a target 10 and a third illumination source 11; the light emitted by the third illumination light source 11 illuminates the target 10, and the target transmitted light is reflected by the second focusing lens 9, the first reflecting mirror 8 and the first light splitting sheet 4 in sequence and then projected into the tested eye 1 through the ocular lens 3. Wherein the target 10 is made of semitransparent material with color patterns; the target 10 and the third illumination light source 11 can synchronously move back and forth, and the relative position between the target 10 and the third illumination light source 11 is unchanged during the movement. By moving the target 10, the tested eyes 1 with different diopters can see the patterns in the target 10 clearly. In this embodiment, the first dichroic beam splitter 4 is a dichroic beam splitter, and reflects light with a wavelength of 450 to 650nm and transmits light with a wavelength of 700 to 1000 nm. The third illumination source 11 is a white light source whose brightness is electrically adjustable (to achieve a differential measurement of scotopic vision and photopic vision). The low brightness and the high brightness of the scotopic vision and the photopic vision are set comprehensively according to the needs of the industry according to the experience value of the industry and the environment of the site.
When in implementation, the single-point illumination light path module comprises: a deflection mirror 12, an intermediate lens 13, a first beam splitter prism 14, a second reflecting mirror 19, a fourth focusing lens 20, a second collimating lens 21, and a measuring light source 22; the measuring light source 22 is arranged at the back focus of the second collimating lens 21, and the emitted measuring light beam is collimated into parallel light by the second collimating lens 21; then reflected by the fourth focusing lens 20 and the second reflecting mirror 19, reflected by the first beam splitter prism 14 for the second time, subjected to divergence angle adjustment by the intermediate lens 13, reflected by the deflection mirror 12 for the third time and reflected by the second beam splitter 5 for the fourth time, and projected into the tested eye 1 by the eye lens 3. The measuring light source 22 is a near infrared point light source (so that a point spread image can be obtained), and has a wavelength of 800 to 950nm, preferably 810 to 860nm, and a light emitting point diameter of less than 10 μm, preferably less than 5 μm. Whereas laser speckle will lead to measurement bias if compared with the type of point light source such as a semiconductor laser. In this embodiment, the spot diameter of the light emitted by the measuring light source 22, which is finally formed at the cornea of the eye, is less than 3mm, preferably less than 2mm. The deflection mirror 12 is a reflecting mirror, the angle of which can be periodically changed, and the angle change period is less than 10ms; the angle adjustment range of the deflection mirror 12 is 1-5 degrees, preferably 1-3 degrees; the installation position of the deflection mirror 12 is conjugate with the pupil of the eye to be measured. The first dichroic prism 14 is a polarizing dichroic prism, and the polarization directions of the reflected light and the transmitted light of the first dichroic prism 14 are perpendicular to each other. The fourth focusing lens 20 can be moved back and forth, and the focusing position of the light source is changed by moving the fourth focusing lens 20, so that the light beam can be focused well on the fundus.
In practice, the Hartmann wavefront aberration detecting optical path module includes an objective lens 3, a second beam splitter 5, a deflection mirror 12, a middle lens 13, a first beam splitter prism 14, a second beam splitter prism 15, a third reflector 23, a third collimating lens 24, a microlens array 25 and a second image sensor 26. After the measuring light beam emitted by the measuring light source 22 is projected into the measured eye 1, the fundus reflected light of the measured eye 1 is emitted through the pupil, is converged through the eye lens 3 in sequence, is reflected through the second beam splitter 5, is reflected through the deflection mirror 12 for the second time, is focused through the middle lens 13, is transmitted through the first beam splitter prism 14, is reflected for the third time through the second beam splitter prism 15, is reflected for the fourth time through the third reflecting mirror 23, is collimated through the third collimating lens 24, is projected onto the micro lens array 25, is split and focused through the micro lens array 25, and is received by the second image sensor 26. In this embodiment, the second image sensor 26 is an area array image sensor, and is disposed at the back focal plane of the microlens array 25. The size of a single microlens in the microlens array 25 is 200-500 mu m; the microlens array position is in object-image conjugate relation with the pupil of the eye 1 under test. When the measured eye has no refractive abnormality, the fundus reflected light is collimated into a parallel beam by the third collimating lens 24, and finally an array of uniformly distributed light spots is formed in the second image sensor 26, as shown in fig. 2 (a). When the human eye has refractive errors, the position distribution of the light spot array changes, and as shown in fig. 2 (b), the refractive error (refractive value D) and wavefront aberration of the human eye can be calculated according to the position change of the light spot array. In this embodiment, a point light source is used, and no diaphragm is required to be secondarily arranged. In this embodiment, the second light splitting prism 15 is a proportional light splitting prism, and the ratio of the light intensity of the reflected light to the light intensity of the transmitted light of the second light splitting prism 15 is 2-5.
In practice, the point spread image acquisition optical path module includes: the optical pickup device comprises a lens 3, a second beam splitter 5, a deflection mirror 12, an intermediate lens 13, a first beam splitter prism 14, a second beam splitter prism 15, a first collimating lens 16, a third focusing lens 17 and a first image sensor 18. After the measuring light beam emitted by the measuring light source 22 is projected into the measured eye 1, the fundus reflection light of the measured eye 1 exits through the pupil, and then the fundus reflection light of the measured eye 1 sequentially converges through the eye lens 3, then reflects through the second beam splitter 5, reflects for the second time through the deflection mirror 12, focuses through the intermediate lens 13, transmits through the first beam splitter prism 14, transmits through the second beam splitter prism 15, is collimated through the first collimating lens 16, focuses through the third focusing lens 17, and then forms an image in the first image sensor 18 (see fig. 3). In this embodiment, the first image sensor 18 is an area array image sensor, and is disposed at the back focal plane of the third focusing lens 17. The first collimating lens 16 is movable back and forth, and by moving back and forth, the refractive error of the eye 1 to be measured is complemented, so that the fundus reflected light becomes a parallel beam after being collimated by the first collimating lens 16, and thus the fundus reflected light is well focused in the first image sensor 18. In the present embodiment, the size of the object of the fundus of the eye 1 to be measured and the size of the imaging of the object in the first image sensor 18 are set with the magnification ratio β. Assuming that the size of an object of the fundus of the eye 1 to be measured is 5 μm, the image size of the first image sensor 18 after passing through the point-spread image acquisition optical path is 15 to 30 times the self-pixel size of the first image sensor 18.
In this embodiment, the mounting position of the deflection mirror 12 and the position of the microlens array 25 are conjugate with the pupil forming object image of the eye 1 to be measured. The target 10, the fourth focusing lens 20 and the first collimating lens 16 are moved synchronously. The deflection mirror 12 can eliminate the backward stray light of the lens by swinging at a high speed, and improve the illumination uniformity and measurement accuracy, so that a calibrator (expensive) is not required, and higher precision can be achieved, thereby saving the cost.
In this embodiment, the electronic control moving slipway mainly includes a moving slipway 27 and a motor 28, and the motor can drive the moving slipway 27 to translate back and forth when rotating. The target 10, the third illumination light source 11, the first collimating lens 16 and the fourth focusing lens 20 are fixedly connected with a movable sliding table, so that a movable assembly of the objective analysis optical system is formed together, and the target 10, the third illumination light source 11, the first collimating lens 16 and the fourth focusing lens 20 are driven to synchronously move when the movable sliding table moves forward and backward.
When the embodiment works, the detection is realized by adopting the following steps:
(1) the third illumination light source 11 is turned on, and the light emission brightness thereof is controlled to be in a low brightness state;
(2) the measured eye 1 is imaged and observed through the area array image sensor 7, the position of the objective analysis optical system (hereinafter referred to as the device) is adjusted according to the eye image, so that the measured eye 1 is aligned with the center position of the device, and the front and back alignment is realized;
(3) turning on the measuring light source 22, the light of the measuring light source 22 is projected to the fundus of the eye 1 to be measured, fundus reflected light is collected by the second image sensor 26, and a refraction value D is preliminarily calculated according to the position of the light spot array in the second image sensor 26;
(4) the motor 28 is controlled to rotate according to the calculated refraction value D, the position of the movable sliding table 27 is adjusted, the target 10, the fourth focusing lens 20 and the collimating lens 16 are integrally driven to move back and forth, the measured eye 1 can clearly see the pattern on the target 10 after movement, the light of the measuring light source 22 is focused on the fundus, at the moment, the second image sensor 26 and the first image sensor 18 collect image data at the same time, the wave front aberration is accurately calculated according to the image in the second image sensor 26, and the position of the movable sliding table 27 is further finely adjusted;
(5) acquiring the image in the first image sensor 18 again to obtain a point spread image of the tested eye 1 under the condition of scotopic vision;
(6) then increasing the brightness of the third illumination light source 11, and collecting the image in the first image sensor 18 again to obtain a point spread image of the tested eye 1 under the photopic vision condition;
(7) and calculating a point spread function diagram through Fourier transformation according to the wavefront aberration data, comparing the point spread function diagram with the actually acquired point spread image, and analyzing the vision quality of the tested eye 1.
In summary, the objective analysis optical system for analyzing vision quality is provided with the optotype, which is important for stable fixation and aberration measurement of eyes; the Hartmann wavefront aberration detection technology and the point spread image direct detection technology are comprehensively utilized, so that the visual quality of human eyes can be accurately estimated; by adjusting the optotype light, the bright field and dark field visual quality can be evaluated.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (10)
1. An objective analysis optical system for analyzing visual quality, comprising: a Hartmann wavefront aberration detection light path module and a point diffusion image acquisition light path module;
the Hartmann wavefront aberration detection light path module is used for receiving fundus reflection light of the eye (1) to be detected through the second image sensor (26) and preliminarily calculating a refraction value D according to the position of the light spot array in the second image sensor (26); after the relative position of the moving component of the objective analysis optical system is adjusted according to the refraction value D to carry out defocus compensation, the wavefront aberration is accurately calculated according to the spot array image received by the second image sensor (26);
the point diffusion image acquisition light path module is used for receiving fundus reflection light of the tested eye (1) through the first image sensor (18) after adjusting the relative position of the moving component of the objective analysis optical system according to the refraction value D to carry out defocus compensation, so as to obtain a point diffusion image of the tested eye (1) under the condition of scotopic vision; the method is also used for obtaining a point spread image of the eye (1) to be tested under the condition of photopic vision under the condition of high brightness; and according to the wavefront aberration, calculating a calculated value of a point spread function chart through Fourier transformation, comparing the calculated value with an actually acquired point spread image, and analyzing the visual quality of the tested eye (1).
2. The objective analysis optical system for analyzing visual quality according to claim 1, further comprising: the system comprises a peripheral imaging light path module, a sighting target light path module and a single-point illumination light path module;
the peripheral imaging light path module is used for integrally imaging the tested eye (1) under the condition of low brightness and is used for monitoring and adjusting the relative position of the objective analysis optical system and the tested eye (1) according to the refraction value D so as to realize alignment;
the optotype light path module is used for projecting a pattern of the target (10) into the tested eye (1) through target transmission light transmitted through the target (10);
the single-point illumination light path module is used for projecting the measuring light beam emitted by the measuring light source (22) into the measured eye (1).
3. The objective analysis optical system for analyzing visual quality according to claim 2, wherein the peripheral imaging optical path module includes: the device comprises a first illumination light source (201), a second illumination light source (202), a lens (3), a first light splitting sheet (4), a first focusing lens (6) and an area array image sensor (7);
the first illumination light source (201) and the second illumination light source (202) illuminate the periphery of the eye (1) to be measured, and the reflected light of the periphery of the eye is focused by the eye lens (3) and transmitted by the first light splitting sheet (4) and focused by the first focusing lens (6) on the area array image sensor (7) for imaging;
the optotype light path module includes: a first mirror (8), a second focusing lens (9), a target (10) and a third illumination source (11);
the light emitted by the third illumination light source (11) illuminates the target (10), and the target transmitted light is projected into the tested eye (1) through the eye lens (3) after being reflected by the second focusing lens (9), the first reflecting mirror (8) and the first light splitting sheet (4) in sequence.
4. An objective analysis optical system for analyzing visual quality according to claim 3, characterized in that the target (10) is a translucent material with a colored pattern; the target (10) and the third illumination light source (11) can synchronously move back and forth, and the relative position between the target (10) and the third illumination light source (11) is unchanged in the moving process.
5. An objective analysis optical system for analyzing visual quality according to claim 3, characterized in that a second light splitter (5) is further provided between the ocular lens (3) and the first focusing lens (6); the reflected light of the periphery of the eye is focused by the eye lens (3), transmitted by the first light-splitting sheet (4) and the second light-splitting sheet (5), and focused by the first focusing lens (6);
the single-point illumination light path module includes: a deflection mirror (12), an intermediate lens (13), a first beam splitter prism (14), a second reflecting mirror (19), a fourth focusing lens (20), a second collimating lens (21) and a measuring light source (22);
the measuring light source (22) is arranged at the back focus of the second collimating lens (21), and the emitted measuring light beam is collimated into parallel light by the second collimating lens (21); then reflected by a fourth focusing lens (20) and a second reflecting mirror (19), reflected by a first beam splitting prism (14) for the second time, subjected to divergence angle adjustment by an intermediate lens (13), reflected by a deflection mirror (12) for the third time and reflected by a second beam splitting mirror (5) for the fourth time, and projected into the eye (1) to be measured by a lens (3).
6. The objective analysis optical system for analyzing visual quality according to claim 1, wherein the hartmann wavefront aberration detecting optical path module includes a ocular lens (3), a second beam splitter (5), a deflection mirror (12), an intermediate lens (13), a first beam splitter prism (14), a second beam splitter prism (15), a third mirror (23), a third collimating lens (24), a microlens array (25), and a second image sensor (26);
after the measuring light beam emitted by the measuring light source (22) is projected into the eye (1) to be measured, fundus reflected light of the eye (1) to be measured is emitted through pupils, is converged through the eye lens (3) in sequence, is reflected through the second beam splitter (5), is reflected by the deflection mirror (12) for the second time, is focused through the middle lens (13), is transmitted through the first beam splitter prism (14), is reflected by the second beam splitter prism (15) for the third time, is collimated through the third collimating lens (24) after being reflected by the third reflecting mirror (23) for the fourth time, is projected onto the micro lens array (25), and is received by the second image sensor (26) after being split and focused through the micro lens array (25).
7. The objective analysis optical system for analyzing visual quality according to claim 6, wherein the point spread image acquisition optical path module includes: a lens (3), a second beam splitter (5), a deflection mirror (12), a middle lens (13), a first beam splitter prism (14), a second beam splitter prism (15), a first collimating lens (16), a third focusing lens (17) and a first image sensor (18);
after the measuring light beam emitted by the measuring light source (22) is projected into the measured eye (1), the fundus reflection light of the measured eye (1) is emitted through the pupil, is converged through the eye lens (3) in sequence, is reflected through the second light splitting sheet (5), is reflected by the deflection mirror (12) for the second time, is focused through the middle lens (13), is transmitted through the first light splitting prism (14), is transmitted through the second light splitting prism (15), is collimated through the first collimating lens (16), is focused through the third focusing lens (17), and is imaged in the first image sensor (18).
8. Objective analysis optical system for analyzing visual quality according to any of claims 5 to 7, characterized in that the deflection mirror (12) is a mirror whose angle can be periodically changed by the oscillation of the mirror surface, the period of change of the angle being less than 10ms; the change range of the angle is 1-5 degrees; the installation position of the deflection mirror (12) and the position of the micro lens array (25) are conjugated with the pupil forming object image of the eye (1) to be tested.
9. Objective analysis optical system for analyzing visual quality according to any of claims 5 to 7, characterized in that the first light splitting prism (14) is a polarizing light splitting prism; the polarization directions of the reflected light and the transmitted light of the first light splitting prism (14) are mutually perpendicular; the second light splitting prism (15) is a proportional light splitting prism, and the light intensity ratio of the reflected light to the transmitted light of the second light splitting prism (15) is 2-5.
10. Objective analysis optical system for analyzing visual quality according to any of claims 5 to 7, characterized in that it further comprises a moving slide (27), said third illumination source (11), target (10), fourth focusing lens (20) and first collimating lens (16) being moved synchronously under the drive of the moving slide (27), together forming a moving assembly of the objective analysis optical system.
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