CN115553714A - Optometry equipment - Google Patents
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- CN115553714A CN115553714A CN202110753238.1A CN202110753238A CN115553714A CN 115553714 A CN115553714 A CN 115553714A CN 202110753238 A CN202110753238 A CN 202110753238A CN 115553714 A CN115553714 A CN 115553714A
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- 210000001525 retina Anatomy 0.000 claims abstract description 53
- 210000005252 bulbus oculi Anatomy 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 32
- 238000003384 imaging method Methods 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims description 46
- 239000000835 fiber Substances 0.000 claims description 8
- 230000002123 temporal effect Effects 0.000 claims description 8
- 230000000007 visual effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000013307 optical fiber Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 208000001491 myopia Diseases 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 210000001508 eye Anatomy 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000004438 eyesight Effects 0.000 description 2
- 230000004379 myopia Effects 0.000 description 2
- 230000002207 retinal effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000002189 macula lutea Anatomy 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0016—Operational features thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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- Medical Informatics (AREA)
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- Ophthalmology & Optometry (AREA)
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Abstract
The invention discloses optometry equipment, which comprises a light source system, an optical component, an imaging system and a processing system, wherein the light source system comprises a light source, a light source and a light source; the light source system is used for emitting a plurality of emergent light beam units; the optical component is arranged opposite to the light source system and used for projecting the emergent light beam units to different positions of the retina of the tested eyeball and guiding the reflected light beam units reflected by the retina to the imaging system; the imaging system acquires a plurality of image units corresponding to the plurality of reflected light beam units and sends the plurality of image units to the processing system to calculate the refraction information. The optometry equipment in the technical scheme of the invention can obtain the refraction information of a plurality of positions of the retina by only measuring once, thereby improving the detection efficiency and the test accuracy.
Description
Technical Field
The invention relates to the technical field of optics, in particular to optometry equipment.
Background
Near vision, far vision, astigmatism and other refractive errors are the most common diseases in clinical ophthalmic outpatients, wherein the near vision is the most common in teenage groups, and the near vision not only brings influence to personal life, but also influences the selection and culture of special professionals such as national recruits, pilots and the like. Therefore, accurate optometry of the eye is particularly important for effective prevention and control of diseases such as myopia and the like.
Refractive information of a macular region and a peripheral retinal region in the center of the retina is very important for myopia prevention and control, but a computer optometer commonly used in the market at present can only obtain the refractive information of the macular region, but cannot obtain the refractive information of the peripheral retinal region. However, in the related art, there is also a method of changing the gazing direction of the person to be measured to obtain the refractive information of the peripheral field, but each measurement requires the person to be measured to change the gazing direction once, the measurement speed is too slow, the detection efficiency is low, and multiple measurements are easily interfered by changes of the state of human eyes, resulting in low accuracy of the refractive information.
Disclosure of Invention
The invention mainly aims to provide optometry equipment, which aims to solve the technical problems of low detection efficiency and low accuracy caused by the fact that refractive information of a plurality of positions of retina of a measured person can be obtained through multiple times of measurement in the prior art.
In order to achieve the above purpose, the optometry equipment provided by the invention comprises a light source system, an optical assembly, an imaging system and a processing system;
the light source system is used for emitting a plurality of emergent light beam units;
the optical component is arranged opposite to the light source system and used for projecting the emergent light beam units to different positions of the retina of the tested eyeball and guiding the reflected light beam units reflected by the retina to the imaging system;
the imaging system acquires a plurality of image units corresponding to the plurality of reflected light beam units and sends the plurality of image units to the processing system to calculate the refraction information.
In an embodiment of the present invention, the plurality of outgoing beam units are arranged in a preset arrangement; the preset arrangement mode comprises the following steps:
a plurality of concentric circular ring type distribution modes taking the visual axis of the detected eyeball as the center;
or, the horizontal meridian of the field angle is distributed along the same interval from the nasal side to the temporal side of the tested eyeball;
or, the horizontal meridian of the non-uniform angle of view from the nasal side to the temporal side of the tested eyeball is distributed;
or, a mode of randomly selecting a plurality of point positions on the retina of the detected eyeball to form distribution is adopted.
In an embodiment of the present invention, the outgoing light beam unit takes two cross sections perpendicular to the main optical axis between the outgoing surface of the light source system and the eyeball to be measured, and the unit patterns corresponding to the two cross sections are similar patterns.
In an embodiment of the present invention, a light source system includes:
a light source module; and
the light beam shaping module is provided with an incident end and an emergent end;
the light beam emitted by the light source module enters the light beam shaping module through the incident end and is emitted from the emergent end to form a plurality of corresponding emergent light beam units.
In an embodiment of the present invention, the light source system further includes a control module, and the control module is configured to control a lighting state of the multiple outgoing light beam units.
In an embodiment of the present invention, the beam shaping module includes an optical fiber bundle and a plurality of diaphragms, the optical fiber bundle has an incident end and an exit end, the exit end includes a plurality of output ports, the incident end corresponds to the light source module, and the plurality of output ports correspond to the plurality of diaphragms one to one.
In an embodiment of the invention, the light source module is configured to emit a plurality of point light source output beams; the beam shaping module comprises a plurality of diaphragms, and the output beams of the point light sources correspond to the diaphragms one to one.
In an embodiment of the invention, the light source module comprises a light-emitting plate and a baffle plate with a plurality of small holes, the baffle plate is positioned between the light-emitting plate and the beam shaping module, and the plurality of small holes correspond to the plurality of diaphragms one to one;
or the light source module comprises a plurality of point light sources, and the plurality of point light sources correspond to the plurality of diaphragms one to one.
In an embodiment of the present invention, the light source module includes a plurality of light sources; the beam shaping module comprises a plurality of lens groups and a plurality of diaphragms, and each lens group is positioned between the corresponding light source and the diaphragm.
In an embodiment of the invention, the light source module is a laser light source, and the beam shaping module is a diffractive optical element.
In the optometry equipment adopting the technical scheme, a plurality of emergent beam units are emitted by a light source system, an optical assembly projects the emergent beam units to different positions of the retina of an eyeball to be measured and guides a plurality of reflected beam units reflected by the retina to an imaging system, the imaging system forms a plurality of corresponding image units by the reflected beam units reflected by the retina at different positions, and the image units are sent to a processing system for calculation so as to obtain refraction information of different positions of the retina. The embodiment realizes that the refraction information of a plurality of position points of the retina can be obtained only by measuring once, thereby improving the detection efficiency and the test accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an optometric instrument of the present invention;
FIG. 2 shows an arrangement of a plurality of exit beam elements in an embodiment of the present invention;
FIG. 3 is another arrangement of multiple exit beam elements in an embodiment of the present invention;
FIG. 4 shows another arrangement of multiple exit beam elements in an embodiment of the present invention;
FIG. 5 is a diagram of another arrangement of multiple exit beam units according to an embodiment of the present invention;
FIG. 6 is an embodiment of a pattern unit of an exit beam unit in an embodiment of the invention;
FIG. 7 is a diagram illustrating an embodiment of a pattern of an emergent beam element emitted from a light source system during transmission according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a light source system according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a light source module and a beam shaping module in a light source system according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an embodiment of a light source module and a beam shaping module in a light source system according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another embodiment of a light source module and a beam shaping module in a light source system according to an embodiment of the invention;
fig. 12 is a schematic structural diagram of a light source module and a beam shaping module in a light source system according to another embodiment of the present invention;
fig. 13 is a schematic structural diagram of a light source module and a beam shaping module in a light source system according to still another embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name(s) | |
| 100 | |
| Emitting terminal | |
| 101 | |
| Lens group | |
| 110 | |
131 | |
|
| 120 | |
200 | |
|
| 121 | |
300 | |
|
| 122 | |
400 | |
|
| 122a | |
500 | |
|
| 130 | Light |
600 | Detected |
|
| | Incident end | 610 | Retina |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides optometry equipment, which aims to project a plurality of emergent light beam units towards different positions of retina of an eyeball to be detected, send a plurality of reflected light beam units reflected by the retina to an imaging system for imaging, calculate each image unit through a processing system to obtain corresponding refraction information of the eyeball to be detected, such as spherical power, cylindrical power, axial direction and the like, realize that the refraction information of a plurality of positions of the retina can be obtained by only measuring once, improve the detection efficiency and improve the test accuracy.
In an embodiment of the present invention, as shown in fig. 1 to 6, the optometric instrument comprises a light source system 100, an optical assembly (not shown), an imaging system 400, and a processing system 500;
the light source system 100 is used for emitting a plurality of outgoing light beam units;
the optical components are disposed opposite to the light source system 100, and are used for projecting the multiple emergent light beam units to different positions of the retina 610 of the eyeball 600 to be detected, and guiding the multiple reflected light beam units reflected by the retina 610 to the imaging system 400;
the imaging system 400 acquires a plurality of image cells corresponding to the plurality of reflected beam cells and sends the plurality of image cells to the processing system 500 for calculating refractive information.
In this embodiment, the light source system 100 is configured to emit a plurality of outgoing light beam units to the eyeball 600 to be tested. The optical components may function to guide the plurality of emergent beam units, and may specifically include projecting the plurality of emergent beam units emitted from the light source system 100 to different positions on the retina 610 of the eyeball 600 to be measured, or may also include guiding the plurality of reflected beam units to the imaging system 400 after the plurality of emergent beam units are reflected by the retina 610 to form a plurality of reflected beam units that are emitted from the eyeball 600 to be measured. The imaging system 400 is configured to expose and image the plurality of reflected beam elements into a plurality of image elements, which correspond one-to-one to the plurality of reflected beam elements reflected by the retina 610. The processing system 500 is configured to obtain raw data of a plurality of image units, so as to calculate and obtain refractive information of each image unit, such as spherical power, cylindrical power, axial direction, and the like, according to each image unit, thereby achieving obtaining refractive information of a plurality of positions of the retina 610 by one-time measurement, and improving detection efficiency.
The plurality of emergent beam elements emitted by the light source system 100 are projected to different positions on the retina 610, and may be understood as being projected to both the macular region and the peripheral region of the retina 610, or only to the macular region of the retina 610, or only to the peripheral region of the retina 610. As long as the refractive information can be projected at different positions of the retina 610, refractive information of multiple positions on the retina 610 can be obtained, so as to achieve more accurate refractive information of the measured eyeball 600. In this embodiment, considering that the macular region of the retina 610 is the most vision-sensitive region, the plurality of outgoing beam units may be projected to the macular region and the peripheral region of the retina 610 at the same time to obtain the refractive information of the macular region and the peripheral region, and further, the prevention and control diagnosis and the like can be more accurately detected for the eyeball 600 to be measured based on the refractive information of different regions of the retina 610.
It can be understood that the distribution of the plurality of emergent beam units emitted from the emergent surface of the light source system 100 is consistent with the distribution entering the eyeball 600 to be detected and falling onto the retina 610, that is, the detection of the corresponding position point on the retina 610 can be realized by adjusting the distribution positions of the plurality of emergent beam units on the light source system 100. In an actual application process, the arrangement of the multiple emergent beam units may be determined according to an actual situation, for example, the emergent beam units may be arranged in a regular array or an irregular scattered distribution, or multiple different emergent beam units may be selected to be arranged, and the specific distribution is not limited herein.
It should be noted that each outgoing beam unit presents a specific pattern when emitted from light source system 100, and different patterns are projected at different positions on retina 610, so as to provide different calculation data for eye refraction. The pattern of the exit beam unit can be any shape, and can be determined according to actual situations, such as a single circular ring shape, a concentric circular ring shape, a point ring shape, a concentric point ring shape or other special shapes.
In practical applications, the optical assembly includes a projection lens assembly 200 and a beam splitter 300, the projection lens assembly 200 is disposed between the light source system 100 and the eyeball 600 to project a plurality of emergent beam units to different positions of the retina 610 of the eyeball 600; the beam splitter 300 is disposed between the projection lens assembly 200 and the eyeball 600 to direct the plurality of reflected light beam units reflected by the retina 610 to the imaging system 400.
The beam splitter 300 is used to separate a projection optical path and an imaging optical path, and the beam splitter 300 is capable of transmitting a light beam emitted from the projection lens group 200, reflecting the light beam reflected from the retina 610 and changing the direction of the reflected optical path to be directed to the imaging system 400.
In practical applications, the imaging system 400 has an image sensor, and the optical assembly guides a plurality of reflected light beam units to the image sensor of the imaging system 400 and forms a plurality of image units on the image sensor, wherein the plurality of image units on the image sensor correspond to the projected unit patterns on the retina 610 in a one-to-one manner according to a predetermined mapping relationship. It can be understood that the imaging system 400 forms a plurality of image units on the image sensor by exposure imaging, the number of exposure times depends on the lighting mechanism of the control module 110 in the light source system 100, all the channel units can be simultaneously and concurrently lighted in this embodiment, and the imaging system 400 records all the image units by one exposure, thereby achieving faster optometry speed and optometry accuracy.
It should be noted that, because the detected eyeball 600 is an asymmetric sphere and the defocus degrees at different positions are different, a plurality of image cells on the image sensor may finally present cell patterns with different shapes and sizes.
The processing system 500 may obtain raw data of a plurality of unit images on the image sensor (each unit image is in a form of a result of deformation of a unit emission beam pattern output by the light source system 100 after refraction of the refraction interstice of the human eye), each unit image corresponds to a specific position or a specific gaze direction of the retina 610, and a specific calculation method thereof may refer to an algorithm similar to a common refractometer to solve dioptric information such as spherical power, cylindrical power, axial direction, etc. of each unit image.
In the optometry equipment of the technical solution of the present invention, the light source system 100 emits a plurality of emergent beam units, the optical assembly projects the plurality of emergent beam units to different positions of the retina 610 of the eyeball 600 to be measured, and guides a plurality of reflected beam units reflected by the retina 610 to the imaging system 400, the imaging system 400 forms a plurality of corresponding reflected beam units reflected by different positions of the retina 610 into a plurality of image units, and sends the plurality of image units to the processing system 500 for calculation, so as to obtain the refraction information of different positions of the retina 610. The embodiment realizes that the refraction information of a plurality of position points of the retina can be obtained only by measuring once, and improves the detection efficiency and the test accuracy.
In an embodiment of the present invention, referring to fig. 2 to 5, a plurality of emergent beam units are arranged according to a preset arrangement; the preset arrangement mode comprises the following steps:
a plurality of concentric circles around the visual axis of the eyeball 600 to be measured;
or, the horizontal meridians along the equal-interval field angles from the nasal side to the temporal side of the eyeball 600;
or, the horizontal meridians are distributed along the horizontal meridians of the non-equidistant field angles from the nasal side to the temporal side of the eyeball 600;
or, a plurality of points on the retina 610 of the eyeball 600 to be tested are randomly selected to form a distribution mode.
It can be understood that the arrangement positions of the plurality of exit beam units correspond to corresponding position points on the retina 610, and the arrangement manner of the plurality of exit beam units may be determined according to actual conditions.
Alternatively, referring to fig. 2, the plurality of light beam emitting units are distributed in a circular ring shape around the visual axis (corresponding to the macula lutea region) of the eyeball 600 to be measured. In addition, the light beam may be distributed in a single ring form around the exit beam unit corresponding to the visual axis, or may be distributed in a plurality of concentric rings around the exit beam unit corresponding to the visual axis. In this distribution mode, the respective emergent beam units are uniformly distributed, and refractive information of a macular region in the retina 610 of the eyeball 600 to be measured and refractive information of a plurality of position points annularly distributed around the macular region in the peripheral region can be measured.
Alternatively, referring to fig. 3, the plurality of emergent beam units are distributed along the horizontal meridian of the equally spaced field angles in the direction from the nasal side to the temporal side of the eyeball 600, and it can be understood that the emergent beam units are uniformly distributed along the outer surface of the eyeball 600 in the transverse direction, and at this time, 1 or more emergent beam units near the middle position correspond to the macular region of the retina 610.
Alternatively, referring to fig. 4, the plurality of emergent beam units are distributed along the horizontal meridian of the non-equally spaced field angles from the nasal side to the temporal side of the eyeball 600, it can be understood that the emergent beam units are distributed irregularly laterally along the outer surface of the eyeball 600, and at this time, 1 or more emergent beam units near the middle position may or may not correspond to the macular region.
Alternatively, referring to fig. 5, the plurality of exit beam elements may also be irregularly randomly distributed to correspond to randomly located points in retina 610.
It should be noted that, in the practical application, the distribution of the plurality of emergent light beam units is not limited to the above four cases, and other arrangements are also possible, such as a plurality of non-concentric circular ring-shaped arrangements, or a rectangular arrangement with the macular region as the center, etc.
In order to further improve the accuracy of the refraction result, referring to fig. 7, in an embodiment of the present invention, the unit patterns of the emergent beam unit are similar between the emergent surface 101 of the light source system 100 and the eyeball 600 under test, and the unit patterns corresponding to two cross sections perpendicular to the main optical axis are similar (the cross sections should be located away from the light beam convergence point).
In this embodiment, the unit pattern of the outgoing light beam unit when the outgoing light beam unit exits from the light source system 100 is limited not to deform on the path before entering the eyeball 600 to be measured, so as to ensure the optometry accuracy.
In practical applications, the unit patterns when emitted from the light source system 100 are not deformed on the path before entering the eyeball 600 to be measured, and it can be understood that there may be a change in magnification, and the unit patterns corresponding to two cross sections perpendicular to the main optical axis are similar patterns, such as an enlarged pattern or a reduced pattern, so as to avoid errors.
In order to realize the above-mentioned multiple outgoing beam unit outgoing, referring to fig. 8 to 13, a specific structure of the light source system 100 will be exemplified below:
the light source system 100 includes a light source module 120 and a beam shaping module 130.
The beam shaping module 130 has an incident end 130A and an exit end 130B;
the light beam emitted from the light source module 120 enters the beam shaping module 130 through the incident end 130A and exits from the exit end 130B to form a plurality of corresponding exit beam units.
The purpose of the beam shaping module 130 is to shape the light beam emitted from the light source module 120 and finally emit a plurality of outgoing beam units from the outgoing end 130B.
It is understood that the light beam received by the incident end 130A of the beam shaping module 130 may be a single light beam or multiple light beams, as long as a plurality of emergent beam units emitted from the emergent end 130B are ensured. Based on this, the light beam emitted from the light source module 120 may be a single light beam or a plurality of light beams.
Alternatively, the light source module 120 may be a single light source, and the beam shaping module 130 may be internally configured as a one-to-many optical splitter.
Alternatively, the light source module 120 may directly provide multiple light source outputs, and in this case, the inside of the beam shaping module 130 may be configured to be implemented by many-to-many optical paths.
Alternatively, the light source module 120 may be a single light source + multiple light source outputs, and in this case, a part of the inside of the beam shaping module 130 may be configured as one-to-many optical branches, and another part may be configured as a many-to-many optical path structure.
Further, in an embodiment of the present invention, the light source system 100 further includes a control module 110, and the control module 110 is configured to control a lighting state of the plurality of outgoing light beam units.
In the present embodiment, the lighting state of the plurality of outgoing beam units includes a state in which the plurality of outgoing beam units are all lit, a state in which the plurality of outgoing beam units are partially lit, a lighting order, and the like.
Specifically, the control module 110 may be an electronic control module or a mechanical control module:
when the control module 110 is an electronic control module, the electronic control module is electrically connected to the light source module 120, and when the light source module 120 is a single light source, the electronic control module can control the light source module 120 to be turned on or off in actual application; when the light source module 120 is a multi-light source, the electronic control module can control the on, off, number of lighting or lighting sequence of the multi-light source.
On this basis, the exit end 130B of the beam shaping module 130 may be set as a controllable or fixed output port. When the output port of the beam shaping module 130 is controllable, the beam shaping module can also be electrically connected with the electric control module to control the opening and closing of the output port through electric power; or a mechanical structure is adopted to control the opening number and the opening sequence of the plurality of output ports.
When the control module 110 is a mechanical control module, the control module 110 may partially block or open the light beam emitted by the light source module 120, or may control only opening and closing of the output port of the light beam shaping module 130 without controlling the light source module 120.
In an embodiment of the present invention, referring to fig. 10, the beam shaping module 130 includes an optical fiber bundle and a plurality of diaphragms 131, the optical fiber bundle has an incident end 130A and an exit end 130B, the exit end 130B includes a plurality of output ports, the incident end 130A corresponds to the light source module 120, and the plurality of output ports correspond to the plurality of diaphragms 131 one to one.
In this embodiment, the light source module 120 may be a single light source or multiple light sources, and the light source module 120 may adopt a light emitting structure such as an LED, a halogen lamp, and an incandescent lamp.
When the light source module 120 uses a single light source, the beam shaping module 130 may use a single-input multi-output fiber bundle, so that the single light beam emitted from the light source module 120 is divided into multiple light beams and emitted from multiple output ports after passing through the fiber bundle, and finally emitted from the corresponding diaphragms 131.
When the light source module 120 employs multiple light sources, the beam shaping module 130 may employ a multi-input multi-output fiber bundle, so that multiple light beams emitted from the light source module 120 enter the fiber bundle through multiple input ports, then exit from multiple output ports, and finally exit from corresponding diaphragms 131.
It is understood that the plurality of diaphragms 131 may be arranged in a predetermined arrangement, so that the plurality of emergent beam units are distributed in the same manner as the arrangement mentioned in the foregoing embodiments. The pattern formed by the transmissive area of the diaphragm 131 is then the cell pattern of the outgoing beam unit.
Optionally, a lens group may be provided at the input end of the bundle to ensure that more light enters the bundle.
In this embodiment, the light of the light source module 120 is guided to the input port of the optical fiber bundle, and the irradiation area of the light source module 120 needs to completely cover the input end face of the optical fiber bundle, so as to avoid the occurrence of a shadow at the output end of the optical fiber bundle.
The output ports of the fiber bundles are spaced sufficiently from the corresponding diaphragms 131 to ensure that the divergence angle of the outgoing beams of the unit is kept within a small range, further avoiding losses caused by too much divergence of the beams.
In the practical application process, a plurality of emergent beam units can be simultaneously lightened, and the design of independently controlling the opening and closing of the diaphragm 131 can be adopted, so that the flexible output of the plurality of emergent beam units is realized.
Optionally, an optical path isolation design may be added between the output port of the fiber bundle to the stop 131 to ensure individual exit beam elements.
In one embodiment of the present invention, referring to fig. 11, the light source module 120 is configured to emit a plurality of point light source output beams; the beam shaping module 130 includes a plurality of diaphragms 131, and the plurality of point light source output beams correspond to the plurality of diaphragms 131 one to one.
In this embodiment, the light beam emitted from the light source module 120 to the light beam shaping module 130 is a multi-path light beam, and the internal structure of the light beam shaping module 130 is a many-to-many light path structure, so as to implement a multi-input and multi-output manner.
It is understood that the beam shaping module 130 may be directly implemented by using a structure with a plurality of diaphragms 131, that is, a plurality of output beams emitted by the light source module 120 directly exit through a corresponding plurality of diaphragms 131 to form the aforementioned plurality of emergent beam units.
Optionally, the light source module 120 includes a light emitting plate 121 and a baffle 122 having a plurality of small holes 122a, the baffle 122 is located between the light emitting plate 121 and the beam shaping module 130, and the plurality of small holes 122a correspond to the plurality of diaphragms 131 one to one.
In this embodiment, the light emitting plate 121 emits light beams, and the light beams are emitted through the plurality of small holes 122a on the baffle 122 to form a plurality of light source output light beams, and meanwhile, the plurality of small holes 122a correspond to the plurality of incident ports of the beam shaping module 130 one by one, so that the plurality of light source output light beams can enter the beam shaping module 130 from the plurality of incident ports correspondingly, that is, exit from the plurality of diaphragms 131, and form the plurality of exit light beam units. In practice, the lighting sequence may be achieved by adding individually controllable diaphragms 131.
Optionally, the light source module 120 includes a plurality of point light sources, and the plurality of point light sources correspond to the plurality of diaphragms 131 one to one. In this embodiment, the light source module 120 may be implemented by using a plurality of LED array light sources with sufficiently small light emitting surfaces, and the lighting sequence may be implemented by directly controlling each light source unit by the control module 110.
In an embodiment of the present invention, referring to fig. 12, the light source module 120 includes a plurality of light sources; the beam shaping module 130 includes a plurality of lens groups 130C and a plurality of diaphragms 131, each lens group 130C being located between a corresponding light source and a diaphragm 131.
In this embodiment, multiple light beams are output from the light source, and the vergence of the light beams output from the light source is adjusted by the light beam shaping module 130. The light source module 120 includes multiple light sources, such as LED array light sources. The beam shaping module 130 may adopt a plurality of lens assemblies 130C or a self-focusing lens assembly to adjust the light beam output from the light source, and then emit the adjusted light beam from a corresponding plurality of diaphragms 131.
It is understood that the lighting sequence of the present embodiment can be implemented by directly controlling each light source by the control module 110.
In an embodiment of the invention, referring to fig. 13, the light source module 120 is a laser light source, and the beam shaping module 130 is a diffractive optical element.
In this embodiment, the laser beam emitted by the light source module 120 is diffracted by the diffractive optical element to output a plurality of outgoing beam units.
It will be appreciated that the pattern and arrangement of the exit beam elements of the light source system 100 is determined by the crystal structure, the angle of placement and the wavelength and angle of incidence of the incident laser light.
In practical applications, the exit surface 101 of the light source system 100 may be any plane perpendicular to the main optical axis and emitted from the diffractive optical element, and the collimation characteristic of the laser light itself determines that the vergence of the light output from any point on the exit surface approaches 0.
The control of the lighting sequence in this embodiment may be implemented by introducing an individually controllable diaphragm 131 at the exit end of the diffractive optical element, and specifically, multiple exit beam units may be simultaneously lighted, or a design of individually controlling the switches of the diaphragm 131 may be adopted, so as to implement flexible output of the multiple exit beam units.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields directly/indirectly applied to the present invention are included in the scope of the present invention.
Claims (10)
1. An optometric instrument comprising a light source system, an optical assembly, an imaging system, and a processing system;
the light source system is used for emitting a plurality of emergent light beam units;
the optical assembly is arranged opposite to the light source system and used for projecting the emergent light beam units to different positions of the retina of an eyeball to be detected and guiding a plurality of reflected light beam units reflected by the retina to the imaging system;
the imaging system acquires a plurality of image units corresponding to the plurality of reflected light beam units and sends the plurality of image units to the processing system to calculate the refraction information.
2. The optometric instrument of claim 1, wherein a plurality of the emergent beam elements are arranged in a predetermined arrangement; the preset arrangement mode comprises the following steps:
a plurality of concentric circular ring type distribution modes taking the visual axis of the detected eyeball as the center;
or, the horizontal meridian of the field angle is distributed along the same interval from the nasal side to the temporal side of the tested eyeball;
or, the horizontal meridian of the non-equal interval field angle from the nasal side to the temporal side of the tested eyeball is distributed;
or, randomly selecting a plurality of point positions on the retina of the detected eyeball to form a distribution mode.
3. The optometric instrument of claim 1, wherein the emergent beam element is between the emergent surface of the light source system and the eyeball under test, and two cross sections perpendicular to the main optical axis are taken, and the corresponding element patterns on the two cross sections are similar patterns.
4. Optometric instrument of any one of claims 1 to 3, wherein the light source system comprises:
a light source module; and
the light beam shaping module is provided with an incident end and an emergent end;
the light beam emitted by the light source module enters the light beam shaping module through the incident end and is emitted from the exit end to form a plurality of corresponding exit light beam units.
5. The optometric instrument of claim 4, wherein the light source system further comprises a control module for controlling the lighting state of the plurality of exit beam units.
6. The optometric instrument of claim 4, wherein the beam shaping module comprises a fiber bundle and a plurality of diaphragms, the fiber bundle having the entrance end and the exit end, the exit end comprising a plurality of output ports, the entrance end corresponding to the light source module, the plurality of output ports corresponding to the plurality of diaphragms one to one.
7. The optometric instrument of claim 4, wherein the light source module is to emit a plurality of point light source output beams; the beam shaping module comprises a plurality of diaphragms, and the plurality of point light source output beams correspond to the plurality of diaphragms one to one.
8. The optometric instrument of claim 7 wherein the light source module comprises a light emitting plate and a baffle having a plurality of apertures, the baffle being positioned between the light emitting plate and the beam shaping module, the plurality of apertures corresponding one-to-one to the plurality of diaphragms;
or the light source module comprises a plurality of point light sources, and the plurality of point light sources correspond to the plurality of diaphragms one to one.
9. The optometric instrument of claim 4, wherein the light source module comprises a plurality of light sources; the beam shaping module comprises a plurality of lens groups and a plurality of diaphragms, and each lens group is positioned between the corresponding light source and the diaphragm.
10. The optometric instrument of claim 4, wherein the light source module is a laser light source and the beam shaping module is a diffractive optical element.
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| CN202110753238.1A CN115553714B (en) | 2021-07-02 | 2021-07-02 | Optometry equipment |
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| CN202110753238.1A CN115553714B (en) | 2021-07-02 | 2021-07-02 | Optometry equipment |
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