Optometry lighting system and optometry device

Abstract

The present invention discloses an optometry lighting system and an optometry device, which relate to the field of optical technology, wherein an optometry lighting system comprises: a light source for emitting a light beam; a pupil diaphragm, wherein the pupil diaphragm is provided with a light-transmitting area, wherein the light-transmitting area is arranged in an annular shape; and a field diaphragm, wherein the field diaphragm is provided with a plurality of light-transmitting holes, and the distances between adjacent light-transmitting holes are equal, and the light beam passes through the light-transmitting area and is emitted through the light-transmitting holes to form projection light. The optometry lighting system provided by the technical solution of the present invention is easy to mass produce, saves costs, and has high reliability.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to an optometry lighting system and an optometry device. Background Art

[0002] The role of the visual condition of the peripheral retina of the human eye in the prevention and control of myopia has been widely studied. In this process, it is necessary to test the peripheral field of vision of the human eye, rather than being limited to the traditional test of the central field of vision of the human eye when fitting glasses.

[0003] At present, the illumination of existing optometry devices requires a large number of light source points and a complex array aperture structure, which makes it impossible to mass-produce optometry devices, and even the manufacture of prototypes is quite difficult. Summary of the invention

[0004] The main purpose of the present invention is to provide an optometry lighting system, aiming to solve the technical problems that the lighting system of the current optometry device is complex, resulting in high processing difficulty, high cost and poor reliability.

[0005] To achieve the above-mentioned purpose, the optometry lighting system proposed by the present invention comprises:

[0006] A light source for emitting a light beam;

[0007] A pupil stop, wherein the pupil stop is provided with a light-transmitting area, and the light-transmitting area is arranged in a ring shape; and

[0008] The field diaphragm is provided with a plurality of light-transmitting holes, and the distances between adjacent light-transmitting holes are equal. The light beam passes through the light-transmitting area and is emitted through the light-transmitting holes to form projection light.

[0009] In one embodiment, the optometry illumination system further includes a first condenser and a second condenser, the light source is arranged at the front focal plane of the first condenser, the pupil stop is arranged at the rear focal plane of the condenser, and the pupil stop is also arranged at the front focal plane of the second condenser.

[0010] In one embodiment, the light source is configured as a light emitting panel.

[0011] In one embodiment, the field stop is conjugate with the light source; and / or,

[0012] The pupil stop is conjugate with the pupil of the human eye.

[0013] In one embodiment, the optometry illumination system further includes a third condenser lens, and the third condenser lens is used to converge the projection light emitted from the field aperture.

[0014] The present invention also proposes an optometry device, comprising: an optometry lighting system, an optical element and an imaging system, wherein the projection light projected by the optometry lighting system is reflected by the optical element into the human eye and forms an array of projection light rings on the retina of the human eye, wherein the projection light rings are reflected by the retina to form reflected light, and the reflected light is incident on the imaging system through the optical element to form an image, wherein the optometry lighting system is the optometry lighting system described above.

[0015] In one embodiment, the optical element is a hollow reflector, and the optical element is provided with a reflective area and a light-transmitting area, the projection light is incident on the reflective area, and is reflected to the human eye by the reflective area, and the projection ring light beam is incident on the imaging system through the light-transmitting area.

[0016] In one embodiment, the optometry device further comprises an objective lens group, and the optical element reflects the projection light and converges the projection light through the objective lens group to enter the human eye; and / or,

[0017] The optical element is arranged tilted, and the optical element is conjugate with the pupil stop and the pupil of the human eye respectively.

[0018] In one embodiment, the imaging system includes an imaging lens group and an imaging sensor. The projected light ring is incident on the imaging lens group through the optical element, and forms a plurality of circular images on the imaging sensor after passing through the imaging lens group.

[0019] In one embodiment, the optometry device further includes a processor, and the processor is used to receive the annular image information transmitted by the imaging sensor and calculate the refractive information through the annular image information.

[0020] The technical solution of the present invention adopts a light-transmitting area in the pupil diaphragm, which is arranged in an annular shape, and a plurality of light-transmitting holes are arranged in the field diaphragm, and the light-transmitting holes are evenly arranged, and the light beam passes through the light-transmitting area and the light-transmitting holes to form a projected light. The light-transmitting area is arranged in an annular shape to control the shape of the projection light ring formed on the retina by the projection light, so that the original pattern of each field refraction test is unified, which is convenient for the unified processing of the image algorithm. Compared with the existing optometry device that needs to obtain multiple annular diaphragm holes, the technical solution of the present invention is easy to manufacture and convenient to achieve mass production through a pupil diaphragm and multiple light-transmitting holes in the field diaphragm, and the position distribution of the multiple light-transmitting holes can control each retinal field position that needs to be measured, avoiding the overlap of the projection light ring at the fundus and thus being unable to be calculated. More importantly, the light beams of the technical solution of the present invention are all emitted through the same annular light-transmitting area of ​​the pupil diaphragm, and the shape of the projection light formed must be consistent, which is convenient for image processing and has high optometry accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of an optometry lighting system and an optometry device embodiment provided by the present invention;

[0023] Figure 2 A schematic structural diagram of an embodiment of a pupil stop light transmission area of ​​an optometry illumination system provided by the present invention;

[0024] Figure 3 A schematic structural diagram of an embodiment of a field stop light transmission hole of an optometry illumination system provided by the present invention;

[0025] Figure 4 Schematic diagram of the light projection rings arranged in an array on the retina.

[0026] Description of Figure Numbers:

[0027] 10. Optometry lighting system;

[0028] 100. Light source;

[0029] 200, pupil stop; 210, light-transmitting area;

[0030] 300, field stop; 310, light transmission hole;

[0031] 400, a first condenser;

[0032] 500, second condenser;

[0033] 600, third condenser;

[0034] 700, human eye; 710, projection halo;

[0035] 800, optical element; 810, objective lens group;

[0036] 900, imaging system; 910, imaging lens assembly; 920, imaging sensor.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] In the prior art, the illumination of the existing optometry devices requires a large number of light source points and a complex array aperture structure, which results in the inability to mass-produce the optometry devices, and even the manufacture of prototypes is quite difficult.

[0042] The invention provides an optometry lighting system.

[0043] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the optometry lighting system 10 includes: a light source 100, a pupil stop 200 and a field stop 300, wherein the light source 100 is used to emit a light beam. The pupil stop 200 is provided with a light-transmitting area 210, and the light-transmitting area 210 is arranged in an annular shape. The field stop 300 is provided with a plurality of light-transmitting holes 310, and the distances between adjacent light-transmitting holes 310 are equal. The light beam passes through the light-transmitting area 210 and is emitted through the light-transmitting holes 310 to form a projection light.

[0044] refer to Figure 2As shown, in the specific implementation process, the optometry lighting system 10 is suitable for optometry with a wide field of view. The light beam emitted by the light source 100 is irradiated toward the pupil stop 200 and passes through the light-transmitting area 210 of the pupil stop 200. The light-transmitting area 210 is arranged in an annular shape, so that the shape of all light beams directed toward the field stop 300 can be controlled. It should be noted that the annular light-transmitting area 210 can be formed on the pupil stop 200 by glass silk-screen printing, and the light-transmitting area 210 is continuous. Of course, the annular light-transmitting area 210 can also be formed by opening through holes at intervals, and the light-transmitting area 210 is discontinuous. The specific implementation method of the light-transmitting area 210 is not limited in this embodiment, and it is found through multiple experiments that the imaging pattern formed on the retina by the continuous light-transmitting area 210 is relatively clear, and there will be no mutual interference and overlap.

[0045] refer to Figure 3 As shown, the light holes 310 are evenly distributed on the field aperture 300, and the distance between two adjacent light holes 310 is equal, so as to avoid the light projection ring 710 overlapping at the fundus and thus being unable to be calculated. The distribution range of the light holes 310 allows the projected light passing through each light hole 310 to be imaged at different positions on the retina, and the light beam passes through the same annular light transmission area 210, thereby improving the optometry accuracy. Both the light holes 310 and the annular light transmission area 210 can be obtained, and the optometry accuracy can be guaranteed, thereby simplifying the production process and achieving mass production compared with the complex array aperture structure required for traditional wide-field optometry.

[0046] The technical solution of the present invention adopts a light-transmitting area 210 in a pupil diaphragm 200, and the light-transmitting area 210 is arranged in an annular shape, and a plurality of light-transmitting holes 310 are arranged in a field diaphragm 300, and the light-transmitting holes 310 are evenly arranged, and the light beam passes through the light-transmitting area 210 and the light-transmitting holes 310 to form a projected light. The light-transmitting area 210 is arranged in an annular shape to control the shape of the projection ring 710 formed on the retina by the projected light, so that the original pattern of each field refraction test is unified, which is convenient for the unified processing of the image algorithm. Compared with the existing optometry device that needs to obtain multiple annular diaphragm holes, the technical solution of the present invention is easy to manufacture through a pupil diaphragm 200 and multiple light-transmitting holes 310 are arranged in the field diaphragm 300, and it is convenient to realize mass production, and the position distribution of the plurality of light-transmitting holes 310 can control each retinal field position that needs to be measured, and avoid the overlap of the projection ring 710 at the fundus and thus the inability to calculate. More importantly, the light beams of the technical solution of the present invention are all emitted through the same annular light-transmitting area 210 of the pupil aperture 200, and the resulting projection light shape must be consistent, which is convenient for image processing and has high optometry accuracy.

[0047] In one embodiment, the optometry illumination system 10 further includes a first condenser 400 and a second condenser 500, the light source 100 is disposed at the front focal plane of the first condenser 400, the pupil stop 200 is disposed at the rear focal plane of the condenser, and the pupil stop 200 is also disposed at the front focal plane of the second condenser 500.

[0048] In the specific implementation process, the first condenser 400 and the second condenser 500 can be a combination of multiple groups of lenses or a single lens, which are used to control and converge the light beam to ensure that the light beam passes through the light-transmitting area 210 of the pupil aperture 200 and further passes through the light-transmitting hole 310.

[0049] In one embodiment, the light source 100 is configured as a light emitting panel, which provides a light source 100 for a wide field of view of the human eye 700. Compared with the prior art which requires a large number of light sources 100, this embodiment uses a light emitting panel, and compared with the prior optometry device which requires a large number of light sources 100, this technical solution can simplify the processing method and save costs, has high reliability, and can achieve mass production.

[0050] In one embodiment, the field stop 300 is conjugated with the light source 100, thereby limiting the light beam and the field of view, controlling the transmission and imaging of the light beam. The pupil stop 200 is conjugated with the pupil of the human eye 700, improving the imaging quality on the retina.

[0051] In one embodiment, the optometry illumination system 10 further includes a third condenser 600, which is used to converge the projection light emitted from the field aperture 300. In the specific implementation process, the third condenser 600 cooperates with the second condenser 500, so that the projection light emitted from the field aperture 300 is converged and imaged to the corresponding area through the third condenser 600, and further reflected into the human eye 700. It can be understood that the third condenser 600 can be a combination of multiple groups of lenses, or a single lens.

[0052] The present invention further proposes an optometry device, which includes: an optometry lighting system 10, an optical element 800 and an imaging system 900. The specific structure of the optometry lighting system 10 refers to the above embodiment. Since the optometry device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0053] Among them, the projection light projected by the optometry lighting system 10 is reflected into the human eye 700 through the optical element 800, and forms an array of projection light rings 710 distributed on the retina of the human eye 700. The projection light rings 710 are reflected by the retina to form reflected light, and the reflected light is incident on the imaging system 900 through the optical element 800 to form an image.

[0054] refer to Figure 1 and Figure 4As shown, in the specific implementation process, the optical element 800 is arranged between the human eye 700 and the imaging system 900, and is arranged opposite to the optometry lighting system 10. The optical element 800 is used to reflect the projection light from the lighting system to the optical element 800, and reflect the transmitted light to the human eye 700, and the projection light forms a projection light ring 710 on the retina of the human eye 700. The projection light ring 710 is reflected by the retina to form reflected light. The optical element 800 is also used to avoid the reflected light, so that the reflected light is incident on the imaging system 900 for imaging. The optical element 800 is arranged at an angle, and the optical element 800 is conjugate with the pupil stop 200 and the pupil of the human eye 700 respectively. In this embodiment, the optical element 800 is arranged at an angle of 45 degrees, and the two sides of the optical element 800 are the human eye 700 and the imaging system 900 respectively. When the projection light of the optometry lighting system 10 converges on the optical element 800, it is reflected to the human eye 700 through the optical element 800.

[0055] In one embodiment, the optical element 800 is a hollow reflector, and the optical element 800 is provided with a reflective area and a light-transmitting area. The projected light is incident on the reflective area and reflected by the reflective area to the human eye 700 . The light beam of the projection ring 710 is incident on the imaging system 900 through the light-transmitting area.

[0056] Specifically, the third condenser 600 of the optometry lighting system 10 converges the projected light in the reflection area and reflects it to the human eye 700 through the reflection area. The reflection area can be a reflector. A circular light-transmitting hole 310 is opened in the middle of the hollow reflector. The light-transmitting hole 310 is a light-transmitting area. The reflected light passes through the hollow reflector from the light-transmitting hole 310 and is incident on the imaging system 900.

[0057] In another embodiment, the optical element 800 may be a combination of a semi-transparent mirror and a rear aperture. When the projected light converges on the semi-transparent mirror, part of the light is reflected to the human eye 700, and the other part passes through the optical element 800. The optical element 800 is tilted and is also shielded by the rear aperture, so that the light passing through the optical element 800 does not enter the imaging system 900. It can be understood that when the reflected light converges on the optical element 800, part of the reflected light passes through the semi-transparent mirror to the imaging system 900, and the semi-transparent mirror also reflects another part of the light.

[0058] In one embodiment, the optometry device further includes an objective lens group 810, and the projection light reflected by the optical element 800 is converged through the objective lens group 810 to enter the human eye 700. Specifically, the objective lens group 810 is disposed between the optical element 800 and the human eye 700, and is used to project the projection light reflected by the optical element 800 to different positions of the retina of the human eye 700. The objective lens group 810 can be a single lens or a combination of multiple lenses. The objective lens group 810 is disposed between the human eye 700 and the optical element 800, and is used to converge the light reflected by the hollow reflector to form an image on the retina, and converge the reflected light reflected by the retina and pass it through the light transmission hole 310, thereby reducing the loss of light.

[0059] In one embodiment, the imaging system 900 includes an imaging lens group 910 and an imaging sensor 920. The light projection ring 710 is incident on the imaging lens group 910 through the optical element 800, and forms a plurality of circular ring images on the imaging sensor 920 after passing through the imaging lens group 910. The imaging sensor 920 can be a large-surface camera, and the circular ring images correspond to the light projection ring 710 on the retina in a one-to-one manner according to a predetermined mapping relationship. The human eye 700 is not a symmetrical sphere, and the refractive state of different positions of the retina is different, and the degree of convergence of the projected light is different, resulting in different shapes of the light projection ring 710, and finally the circular ring images on the imaging sensor 920 have certain differences.

[0060] In the specific implementation process, the optometry device also includes a processor, which is used to receive the annular image information transmitted by the imaging sensor 920 and calculate the refractive information through the annular image information. The refractive information includes spherical power, cylindrical power, axial power, etc. Through the cooperation of the pupil diaphragm 200 and the field diaphragm 300, the image is formed at different positions of the retina to form a projection ring 710. In this way, the refractive information of multiple positions of the retina can be obtained by measuring once, thereby improving the detection efficiency and detection accuracy.

[0061] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optometry lighting system, characterized in that: include: a light source for emitting a light beam; A pupil diaphragm, wherein the pupil diaphragm is provided with a light-transmitting area, the light-transmitting area is arranged in a ring shape, and the pupil diaphragm is conjugate with the pupil of the human eye; as well as A field stop, wherein the field stop is provided with a plurality of light-transmitting holes, and the distances between adjacent light-transmitting holes are equal, and a light beam passes through the light-transmitting area and is emitted through the light-transmitting holes to form a projection light, and the field stop is conjugate with the light source; A first condenser and a second condenser, the light source is disposed at a front focal plane of the first condenser, the pupil stop is disposed at a rear focal plane of the condenser, and the pupil stop is also disposed at a front focal plane of the second condenser; A third condenser is used to condense the projection light emitted from the field aperture.

2. The optometry lighting system according to claim 1, characterized in that: The light source is configured as a light emitting panel.

3. An optometry device, characterized in that: include: An optometry lighting system, an optical element and an imaging system, wherein the projection light projected by the optometry lighting system is reflected by the optical element into the human eye and forms an array of projection light rings on the retina of the human eye, the projection light rings are reflected by the retina to form reflected light, and the reflected light is incident on the imaging system through the optical element to form an image, wherein the optometry lighting system is the optometry lighting system as described in any one of claims 1 to 2.

4. The optometry device according to claim 3, characterized in that: The optical element is a hollow reflector, and the optical element is provided with a reflection area and a light-transmitting area. The projection light is incident on the reflection area and reflected to the human eye through the reflection area. The projection ring light beam is incident on the imaging system through the light-transmitting area.

5. The optometry device according to claim 3, characterized in that: The optometry device further comprises an objective lens group, and the optical element reflects the projection light, which is converged by the objective lens group to enter the human eye; and / or, The optical element is arranged tilted, and the optical element is conjugate with the pupil stop and the pupil of the human eye respectively.

6. The optometry device according to claim 5, characterized in that: The imaging system comprises an imaging lens group and an imaging sensor. The projected light ring is incident on the imaging lens group through the optical element and forms a plurality of circular ring images on the imaging sensor after passing through the imaging lens group.

7. The optometry device according to claim 6, characterized in that: The optometry device further includes a processor, which is used to receive the annular image information transmitted by the imaging sensor and calculate refractive information through the annular image information.

Images