CN115414000A - Diopter measurement system and method and computer optometry instrument - Google Patents
Diopter measurement system and method and computer optometry instrument Download PDFInfo
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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
- A61B3/0025—Operational features thereof characterised by electronic signal processing, e.g. eye models
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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
- A61B3/0075—Apparatus for testing the eyes; Instruments for examining the eyes provided with adjusting devices, e.g. operated by control lever
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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
- A61B3/0091—Fixation targets for viewing direction
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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
- A61B3/1015—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for wavefront analysis
Abstract
The invention relates to the technical field of medical equipment, in particular to a diopter measuring system, a diopter measuring method and a computer refractometer, wherein the system comprises the following components: the adjustable vision fixation lamp, the semi-transparent semi-reflecting mirror, the vibrating mirror, the scanning objective lens group, the reflecting mirror, the collimating lens and the wavefront aberration detector; the semi-transparent semi-reflecting mirror reflects the measuring light emitted by the adjustable fixed vision lamp to the vibrating mirror; the galvanometer reflects the measuring light to the scanning objective lens group and projects the measuring light to human eyes through the scanning objective lens group; the scanning objective lens group projects the wavefront signal light reflected by the human eyes to the galvanometer; the galvanometer projects the wavefront signal light to the reflector through the semi-transparent semi-reflecting mirror; the reflector projects the wavefront signal light to the wavefront aberration detector through the collimating lens; the wave front aberration detector detects diopter of the human eyes according to the wave front signal light; compared with the existing method which only can detect the diopter of the fovea retina, the method provided by the invention increases the detection area, and further improves the accuracy of the detection result.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a diopter measuring system and method and a computer refractometer.
Background
At present, an optometry instrument is an important auxiliary detection medical means no matter in ophthalmology or a spectacle shop, and a computer optometry instrument is used as an objective optometry instrument, emits a measurement light source through a vision fixation lamp, penetrates eyeball organs such as an eye cornea, a crystalline lens, aqueous humor and a retina, is projected to the retina of an eyeball, is reflected back to a corresponding optical system of the instrument, is received by a CCD (charge coupled device), converts an optical signal into an electric signal, and further completes diopter measurement.
However, when the refractive power of the eyeball is measured by the existing computer optometry instrument, only the diopter of the central fovea retina can be detected due to the internal fixed structure, and the detection area is single, so that the detection result accuracy is low, and certain limitation is realized.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a diopter measuring system, a diopter measuring method and a computer refractometer, and aims to solve the technical problems that in the prior art, an eyeball diopter detection area is single, and the accuracy of a detection result is low.
To achieve the above object, the present invention provides a diopter measurement system including: the adjustable vision fixation lamp, the semi-transparent semi-reflecting mirror, the vibrating mirror, the scanning objective lens group, the reflecting mirror, the collimating lens and the wavefront aberration detector;
the semi-transparent semi-reflecting mirror reflects the measuring light emitted by the adjustable vision fixing lamp to the vibrating mirror;
the galvanometer reflects the measuring light to the scanning objective lens group and projects the measuring light to human eyes through the scanning objective lens group so that the human eyes reflect wavefront signal light;
the scanning objective lens group projects the wavefront signal light reflected by the human eyes to the galvanometer;
the galvanometer projects the wavefront signal light to the reflector through the semi-transparent semi-reflecting mirror;
the reflecting mirror projects the wavefront signal light to the wavefront aberration detector through the collimating lens;
the wavefront aberration detector detects diopter of the human eye according to the wavefront signal light;
wherein, the projection position of the wave front signal light to the human eye is determined by the reflection angle of the galvanometer and the emission angle of the adjustable vision fixation lamp.
Optionally, the half mirror is disposed on an optical path between the galvanometer and the mirror, and the collimating lens is disposed on an optical path between the mirror and the wavefront aberration detector.
Furthermore, in order to achieve the above object, the present invention also proposes a diopter measurement method applied to the diopter measurement system as described above, the method including the steps of:
determining a target acquisition point of a to-be-detected area based on a diopter measurement system, and traversing the target acquisition point by adjusting the space coordinate of a galvanometer;
determining the space coordinate of the current reflection angle of the galvanometer according to the target acquisition point obtained by each traversal;
performing position association according to the obtained space coordinates and the corresponding target acquisition points;
and carrying out diopter detection on the human eye to be detected through the position correlation result based on the diopter measurement system.
Optionally, the step of determining a target acquisition point of the area to be detected based on the diopter measurement system includes:
determining a central point of a to-be-detected area based on a diopter measurement system;
performing area division according to a preset range based on the central point;
and determining a target acquisition point according to the region division result.
Optionally, before the step of performing position association according to the obtained spatial coordinates and the corresponding target acquisition points, the method further includes:
establishing a preset coordinate system according to the region division result;
taking the target acquisition points in the preset direction as marked acquisition points based on the preset coordinate system;
correspondingly, the step of performing position association according to the obtained spatial coordinates and the corresponding target acquisition points includes:
fitting according to the obtained space coordinates and the corresponding mark acquisition points to obtain a fitting model;
and obtaining the space coordinates corresponding to the target acquisition points according to the fitting model, and performing position association on the target acquisition points and the corresponding space coordinates.
Optionally, before the step of obtaining the spatial coordinates corresponding to the target collection point according to the fitting model and performing position association between the target collection point and the corresponding spatial coordinates, the method further includes:
determining residual acquisition points according to the target acquisition points and the marked acquisition points;
correspondingly, the step of obtaining the spatial coordinates corresponding to the target acquisition points according to the fitting model and performing position association on the target acquisition points and the corresponding spatial coordinates comprises the following steps:
obtaining space coordinates corresponding to the residual acquisition points according to the fitting model;
and carrying out position association on the residual acquisition points and the corresponding space coordinates and the marked acquisition points and the corresponding space coordinates.
Optionally, the step of performing diopter detection on a human eye to be detected through a position correlation result based on the diopter measurement system includes:
projecting measuring light to the human eye to be measured through a position correlation result based on the diopter measuring system;
receiving wavefront signal light reflected by the human eyes to be detected, and obtaining corresponding wavefront slope and wavefront aberration according to the wavefront signal light;
and obtaining a diopter detection result of the human eye to be detected according to the wavefront slope and the wavefront aberration.
Optionally, after the step of receiving the wavefront signal light reflected by the human eye to be measured, the method further includes:
filtering the received wavefront signal light to obtain filtered wavefront signal light;
correspondingly, the step of obtaining the corresponding wavefront slope and wavefront aberration according to each wavefront signal light includes:
and obtaining corresponding wavefront slope and wavefront aberration according to the filtered wavefront signal light.
Optionally, the step of filtering the received wavefront signal lights to obtain filtered wavefront signal lights includes:
carrying out characteristic identification on each received wavefront signal light to obtain effective signal light spots;
carrying out region division on the obtained effective signal light spots, and obtaining the distance between the centroids of the effective signal light spots of adjacent regions;
judging whether the distance between the centroids of the effective signal light spots of the adjacent areas exceeds a preset threshold value or not;
and if not, taking the effective signal light spots of the adjacent areas as the filtered wavefront signal light.
In addition, in order to achieve the above object, the present invention also provides a computer refractometer, which comprises the diopter measurement system as described above.
The invention provides a diopter measurement system, which comprises: the adjustable vision fixation lamp, the semi-transparent semi-reflecting mirror, the vibrating mirror, the scanning objective lens group, the reflecting mirror, the collimating lens and the wavefront aberration detector; the semi-transparent semi-reflecting mirror reflects the measuring light emitted by the adjustable vision fixing lamp to the vibrating mirror; the galvanometer reflects the measuring light to the scanning objective lens group and projects the measuring light to human eyes through the scanning objective lens group so that the human eyes reflect wavefront signal light; the scanning objective lens group projects the wavefront signal light reflected by the human eyes to the galvanometer; the galvanometer projects the wavefront signal light to the reflector through the semi-transparent semi-reflecting mirror; the reflector projects the wavefront signal light to the wavefront aberration detector through the collimating lens; the wavefront aberration detector detects diopter of the human eyes according to the wavefront signal light; wherein, the projection position of the wave front signal light to the human eye is determined by the reflection angle of the galvanometer and the emission angle of the adjustable vision fixation lamp. Because the projection position of the wavefront signal light projected to the human eyes is determined by adjusting the reflection angle of the vibrating mirror and the emission angle of the adjustable fixation lamp, the diopter detection can be performed on the retina around the fovea of the human eyes.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a diopter measurement system according to the present invention;
FIG. 2 is a schematic flow chart of a diopter measurement method according to a first embodiment of the present invention applied to a diopter measurement system;
FIG. 3 is a schematic flow chart of a diopter measurement method according to a second embodiment of the present invention;
FIG. 4 is a diagram of a predetermined coordinate system in a second embodiment of the diopter measurement method according to the present invention;
fig. 5 is a schematic flow chart of a diopter measurement method according to a third embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Adjustable |
5 | Human eye |
| 2 | Semi-transparent semi-reflecting mirror | 6 | Reflecting mirror |
| 3 | Vibrating mirror | 7 | Collimating lens |
| 4 | Scanning objective lens assembly | 8 | Wavefront aberration detector |
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
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a diopter measurement system according to a first embodiment of the present invention;
as shown in fig. 1, the diopter measurement system includes: the device comprises an adjustable fixation lamp 1, a semi-transparent semi-reflecting mirror 2, a vibrating mirror 3, a scanning objective lens group 4, a reflecting mirror 6, a collimating lens 7 and a wavefront aberration detector 8;
the semi-transparent semi-reflecting mirror 2 reflects the measuring light emitted by the adjustable vision fixing lamp 1 to the vibrating mirror 3;
the galvanometer 3 reflects the measuring light to the scanning objective lens group 4 and projects the measuring light to a human eye 5 through the scanning objective lens group 4, so that the human eye 5 reflects wavefront signal light;
the scanning objective lens group 4 projects the wavefront signal light reflected by the human eye 5 to the galvanometer 3;
the galvanometer 3 projects the wavefront signal light to the reflector 6 through the semi-transparent semi-reflective mirror 2;
the reflector 6 projects the wavefront signal light to the wavefront aberration detector 8 through the collimating lens 7;
the wave front aberration detector 8 detects diopter of the human eyes 5 according to the wave front signal light;
wherein, the projection position of the wavefront signal light to the human eye 5 is determined by the reflection angle of the galvanometer 3 and the emission angle of the adjustable fixation lamp 1.
It should be noted that the adjustable fixation lamp 1 can be used as a measurement light source to emit measurement light, and in order to increase the scanning range of the human eye 5, the emitting angle of the adjustable fixation lamp 1 can be adjusted, so as to change the visual axis direction of the human eye 5, thereby realizing the scanning of the retina around the human eye 5.
It can be understood that the aforementioned galvanometer 3 may be connected to a corresponding motor shaft (not shown in the figure), and the motor shaft may control the galvanometer 3 to deflect, so as to change the spatial coordinate of the galvanometer 3, and adjust the reflection angle of the galvanometer 3, so as to change the angle of the measuring light projected to the human eyes 5, thereby detecting the refractive status around the corresponding visual axis.
It should be understood that the scanning objective lens group 4 may include a plurality of scanning lenses, the number of the scanning lenses may be set according to user requirements, the embodiment is not limited thereto, and the wavefront aberration detector 8 may perform diopter detection on the human eye 5 according to the shack-hartmann wavefront aberration principle after receiving the wavefront signal light.
It should be emphasized that, in order to ensure that the wavefront signal light reflected by the human eye 5 can be accurately transmitted to the wavefront aberration detector 8, in the present embodiment, the half mirror 2 is disposed on the optical path between the galvanometer 3 and the reflector 6, and the collimator lens 7 is disposed on the optical path between the reflector 6 and the wavefront aberration detector 8.
The diopter measurement system provided by the embodiment comprises: the device comprises an adjustable fixation lamp 1, a semi-transparent semi-reflecting mirror 2, a vibrating mirror 3, a scanning objective lens group 4, a reflecting mirror 6, a collimating lens 7 and a wavefront aberration detector 8; when diopter detection is carried out, the half-transmitting and half-reflecting mirror 2 reflects the measuring light emitted by the adjustable fixation lamp 1 to the vibrating mirror 3; the galvanometer 3 reflects the measuring light to the scanning objective lens group 4 and projects the measuring light to a human eye 5 through the scanning objective lens group 4, so that the human eye 5 reflects the wavefront signal light; the scanning objective group 4 projects the wave front signal light reflected by the human eyes 5 to the galvanometer 3; the galvanometer 3 projects the wavefront signal light to the reflector 6 through the semi-transparent semi-reflecting mirror 2; the reflector 6 projects the wavefront signal light to the wavefront aberration detector 8 through the collimating lens 7; the wavefront aberration detector 8 performs diopter detection on the human eye 5 according to the wavefront signal light; because this embodiment determines the projection position that wavefront signal light throws to human eye 5 through the reflection angle of adjusting galvanometer 3 and the emission angle of adjustable look lamp 1, and then can carry out diopter detection to the retina of human eye 5 fovea periphery, increased the detection area, promoted the degree of accuracy of testing result.
Further, based on the diopter measurement system, the present embodiment provides a diopter measurement method applied to the above system, referring to fig. 2, and fig. 2 is a schematic flow diagram of a diopter measurement method applied to the diopter measurement system according to the first embodiment of the present invention. As shown in fig. 2, the above method includes the steps of:
step S10: determining a target acquisition point of a to-be-detected area based on a diopter measurement system, and traversing the target acquisition point by adjusting the space coordinate of a galvanometer;
it should be noted that the executing body of the present embodiment may be applied in a scene of performing diopter detection on human eyes or a scene of performing diopter detection on other eyeballs. The executing body of the embodiment may be a diopter measuring device, and the diopter measuring system, such as a computer refractometer, may be disposed inside the diopter measuring device, or may be other devices capable of implementing the same or similar functions. This embodiment and the following embodiments are specifically described with the diopter measurement device (hereinafter, simply referred to as a device) described above, and a scene in which diopter detection is performed with respect to the human eye is also specifically described.
It can be understood that the area to be detected may be the entire retina of a human eye, or may be a certain area of the retina in the human eye, and the target collection point may be a collection point for diopter detection.
It should be understood that the spatial coordinate of the galvanometer is the rotation step of the motor shaft, the reflection angle of the galvanometer can be changed by changing the rotation step of the motor shaft, and in order to accurately project the measurement light reflected by the galvanometer to the target collection points, the device can project the measurement light to each target collection point by adjusting the spatial coordinate of the galvanometer, thereby realizing traversal of each collection point.
Considering that when the number of target acquisition points is large, the traversal time of the target acquisition points may be long, and in order to improve the traversal efficiency, in this embodiment, a part of the acquisition points may be selected from the to-be-detected region for traversal, and the specific steps are as follows:
the step of determining the target acquisition point of the area to be detected based on the diopter measurement system comprises the following steps:
step S11: determining a central point of a to-be-detected area based on a diopter measurement system;
it should be noted that, in order to ensure that the selected acquisition points may conform to the linear relationship between the whole area to be detected and the spatial coordinates, the above-mentioned device may set acquisition points in the area to be detected at certain intervals, for example, set an acquisition point every 5 intervals, or set an acquisition point in other units of numerical values, which is not limited in this embodiment.
It can be understood that the device can take the acquisition point located at the center of the region to be detected as the center point.
Step S12: performing area division according to a preset range based on the central point;
it should be understood that the preset range may be set according to actual situations, and the device may perform area division in a circle form within the preset range by taking the center point as a center of the circle, or perform area division in other (e.g., rectangular) forms, and in view of that the obtained area in the circle form may be ensured to better conform to characteristics of human eyes, the circle form is adopted in this embodiment.
Step S13: and determining a target acquisition point according to the region division result.
After the area division is performed, the device may use the acquisition point located in the area as the target acquisition point.
In a specific implementation, the device may determine a central point in a region to be detected, perform region division in a preset range in a circle form with the central point as a center of a circle, and finally use a collection point located in the circle as a target collection point, so as to reduce the number of the target collection points and ensure that the target collection points more conforming to human eye characteristics are obtained.
Step S20: and determining the space coordinate of the current reflection angle of the galvanometer according to the target acquisition point obtained by each traversal.
It should be noted that, during the traversal, the device may determine coordinate information of the target acquisition point, and determine whether the device traverses the target acquisition point by receiving the wavefront signal light reflected by the to-be-detected region onto the wavefront aberration detector, and if the position of the received wavefront signal light matches the coordinate information, it may be determined that the device traverses the target acquisition point, and obtain the spatial coordinate of the current reflection angle of the galvanometer corresponding to the target acquisition point.
Step S30: and performing position association according to the obtained space coordinates and the corresponding target acquisition points.
It can be understood that, in order to directly perform diopter detection on the target acquisition points during actual detection, the device can construct a mapping relationship between each target acquisition point and the corresponding spatial coordinates and store the mapping relationship, so that the corresponding spatial coordinates can be directly obtained according to the mapping relationship during subsequent use.
Step S40: and carrying out diopter detection on the human eye to be detected through the position correlation result based on the diopter measurement system.
It should be emphasized that, in order to further increase the detection range, before the step S10, the emission angle of the adjustable fixation lamp may be adjusted to further change the visual axis direction of the human eye, so that the region to be detected is changed, and the scanning surface of the peripheral retina is increased.
In a specific implementation, the device can determine the spatial coordinates of the galvanometer through a position correlation result, and the position of the measuring light projected to the human eyes can be changed by adjusting the spatial coordinates of the galvanometer, so that the detection area is increased.
The device can determine a central point in a region to be detected, the central point is used as a circle center, region division is performed in a circle mode in a preset range, finally, the collecting points in the circle are used as target collecting points, the number of the target collecting points can be reduced, meanwhile, the target collecting points which are more consistent with human eye characteristics can be obtained, the target collecting points are traversed by adjusting the space coordinates of the vibrating mirror, the space coordinates corresponding to the vibrating mirror are determined according to the target collecting points obtained by traversal, position correlation is performed between the space coordinates and the target collecting points, and then during subsequent diopter detection, the device can determine the space coordinates corresponding to the vibrating mirror in the region to be detected according to the position correlation result, diopter detection is achieved by adjusting the vibrating mirror to the space coordinates, the detection region is enlarged, and the accuracy of the detection result is improved.
Referring to fig. 3, fig. 3 is a flowchart illustrating a diopter measurement method according to a second embodiment of the present invention.
In view of the fact that when the number of target acquisition points is still large, in order to improve the efficiency of position correlation, as shown in fig. 3, based on the first embodiment, in this embodiment, before the step S30, the method further includes:
step S301: and establishing a preset coordinate system according to the region division result.
It should be noted that the preset coordinate system may be a rectangular coordinate system, and the apparatus may establish the rectangular coordinate system for the region division result.
Step S302: and taking the target acquisition point in the preset direction as a marked acquisition point based on the preset coordinate system.
For convenience of understanding, reference may be made to fig. 4 for explanation, as shown in fig. 4, the apparatus establishes a preset coordinate system in the region division result, and uses an X-axis direction, a Y-axis direction, an X-axis 45 ° included angle direction, and an X-axis 135 ° included angle direction as the preset direction according to the preset coordinate system, and uses a target acquisition point located in the preset direction as a mark acquisition point.
It is understood that the preset direction may be a direction based on the central symmetry of the preset coordinate system, and the preset direction is only convenient for understanding and does not limit the actual content, and may also be other included angle directions of the X axis.
Accordingly, the step S30 includes:
step S31: and fitting according to the obtained space coordinates and the corresponding mark acquisition points to obtain a fitting model.
It should be understood that, since there is a certain linear relationship between the spatial coordinates and the mark acquisition points, in order to describe the linear relationship, the mark acquisition points and the corresponding spatial coordinates may be fitted by software to obtain a fitting model.
Step S32: and obtaining the space coordinates corresponding to the target acquisition points according to the fitting model, and carrying out position association on the target acquisition points and the corresponding space coordinates.
It should be noted that, because the fitting model can represent the linear relationship between the mark collection point and the corresponding spatial coordinate, and the spatial coordinate relationship between the target collection point and the corresponding spatial coordinate also satisfies the linear relationship, the spatial coordinate corresponding to the whole target collection point can be obtained through the fitting model, and the position of the target collection point and the corresponding spatial coordinate can be correlated, and further, the position of each target collection point can be correlated without adjusting the spatial coordinate, thereby improving the efficiency of position correlation.
In a specific implementation, the device may establish a preset coordinate system according to the region division result, and based on the preset coordinate system, use the target collection points in the preset direction as the marked collection points, perform fitting according to the marked collection points and the corresponding spatial coordinates to obtain a fitting model, obtain spatial coordinates corresponding to each target collection point according to the fitting model, and perform position association on each target collection point and the corresponding spatial coordinates.
It can be understood that, since the device has already obtained the mark collection point and the corresponding spatial coordinate, it is not necessary to obtain the mark collection point and the corresponding spatial coordinate again through a fitting model in the position association process, and further the specific steps are as follows: before the step S32, the method further includes: determining residual acquisition points according to the target acquisition points and the marked acquisition points; accordingly, the step S32 includes: obtaining space coordinates corresponding to the residual acquisition points according to the fitting model; and carrying out position association on the residual acquisition points and the corresponding space coordinates and the marked acquisition points and the corresponding space coordinates.
It should be understood that the above-described apparatus may compensate the spatial coordinates of the remaining acquisition points by an interpolation algorithm according to the fitted model.
According to the embodiment, a preset coordinate system can be established according to the region division result, target acquisition points in a preset direction are used as marked acquisition points based on the preset coordinate system, fitting is carried out according to the marked acquisition points and corresponding space coordinates to obtain a fitting model, then, the remaining acquisition points are determined according to the target acquisition points and the marked acquisition points, the space coordinates corresponding to the remaining acquisition points are determined by applying an interpolation algorithm based on the fitting model in a compensation mode, at the moment, all the target acquisition points and the corresponding space coordinates can be obtained, and further, the position correlation of all the target acquisition points can be realized.
Further, in consideration of the fact that dust may be attached to the optical elements (the galvanometer, the reflector, etc.) during diopter detection, so that stray light exists in the wavefront signal received by the wavefront aberration detector and affects the detection result, referring to fig. 5, fig. 5 is a flowchart of a diopter measurement method according to a third embodiment of the present invention. As shown in fig. 5, based on the above embodiments, the step S40 includes:
step S41: and projecting the measuring light to the human eye to be measured through the position correlation result based on the diopter measuring system.
It should be noted that, the above-mentioned device can adjust the spatial coordinate of the galvanometer through the result of the position correlation, and then can project the measuring light emitted by the adjustable fixation lamp to each target collecting point on the human eye to be detected, so as to realize the detection of the periphery of the human eye in the visual axis direction.
Step S42: and receiving the wavefront signal light reflected by the human eye to be detected, and obtaining the corresponding wavefront slope and wavefront aberration according to the wavefront signal light.
It can be understood that the measuring light can form wavefront signal light on the retina of the human eye to be measured, distorted wavefront (wavefront signal light) from the retina of the human eye is projected to the wavefront aberration detector through the vibrating mirror, the semi-transparent semi-reflective lens, the reflecting mirror and the collimating lens to form a series of fuzzy light spots on the wavefront aberration detector, and then each light spot is processed based on the shack-hartmann wavefront aberration principle to obtain the centroid position edge difference between the actual light spot and the theoretical light spot, the corresponding wavefront slope can be obtained through geometric optics, and the wavefront aberration of each light spot can be obtained through the centroid position edge difference.
Step S43: and obtaining a diopter detection result of the human eye to be detected according to the wavefront slope and the wavefront aberration.
It should be understood that, according to the above-mentioned wavefront slope and wavefront aberration, a corresponding zernike coefficient can be obtained, and according to the above-mentioned zernike coefficient, a diopter detection result of the human eye to be detected can be obtained.
Further, in order to filter stray light, after the step of receiving the wavefront signal light reflected by the human eye to be measured, the method further includes: filtering each received wave front signal light to obtain filtered wave front signal light; correspondingly, the step of obtaining the corresponding wavefront slope and wavefront aberration according to each wavefront signal light includes: and obtaining corresponding wavefront slope and wavefront aberration according to the filtered wavefront signal light.
Considering that the existing filtering mode can be to filter the whole received wavefront signal light, the filtering effect is poor, in order to further improve the filtering effect, the step of filtering the received wavefront signal light to obtain the filtered wavefront signal light includes: carrying out characteristic identification on each received wavefront signal light to obtain effective signal light spots; carrying out region division on the obtained effective signal light spots, and obtaining the distance between the centroids of the effective signal light spots of adjacent regions; judging whether the distance between the effective signal light spot centroids of the adjacent areas exceeds a preset threshold value or not; and if not, taking the effective signal light spots of the adjacent areas as the filtered wavefront signal light.
It should be noted that a feature extraction model may be stored in the apparatus, and the feature extraction model may identify an effective signal spot and stray light in the wavefront signal light according to the spot texture and the arrangement features of each wavefront signal light, and extract the identified effective signal spot.
It can be understood that the feature extraction model can be established based on a binocular monitoring camera, a three-dimensional reconstruction system is established by monitoring the binocular monitoring camera, further, the spatial correlation between the visual axis direction of the human eye to be detected and the wavefront signal light can be obtained, and the feature extraction model is obtained according to the spatial correlation.
It should be understood that, after the device extracts the effective signal spots, in order to facilitate further filtering, each effective signal spot may be divided into independent rectangular areas, and the size of the rectangular area may be set according to the actual spot size, which is not limited in this embodiment.
It is emphasized that the above-mentioned device can filter according to the centroid distance of the light spots in each independent rectangular area, when the centroid distance of the adjacent area does not exceed the preset threshold, it can be determined that the area does not need to be filtered, and diopter detection is performed through the wavefront signal light of the area, when the centroid distance of the adjacent area exceeds the preset threshold, it can be determined that the area needs to be filtered; it should be noted that the preset threshold may be set according to actual conditions.
Meanwhile, in order to facilitate the use of a user, the device can also evaluate the quality of the wavefront signal light collection according to the filtering result and the feature extraction model.
In the specific implementation, when the device receives wavefront signal light, the device can perform feature recognition through a feature extraction model to obtain effective signal light spots, divide each effective signal light spot into independent rectangular regions, obtain a distance between centroids of effective signal light spots of adjacent regions, and judge whether the distance exceeds a preset threshold, if so, filter the effective signal light spots of the regions, if not, retain the effective signal light spots of the regions, and use the effective signal light spots of the regions as the filtered wavefront signal light.
The embodiment can project measuring light to human eyes to be measured according to different angles based on a diopter measuring system through a position correlation result, receive wavefront signal light reflected by the human eyes to be measured, form a series of fuzzy light spots on a wavefront aberration detector, obtain effective signal light spots through a feature extraction model, perform area division on the effective signal light spots, judge whether the distance between the centers of mass of the light spots in adjacent areas exceeds a preset threshold value, if not, retain the effective signal light spots in the areas, further realize stray light filtration, process each filtered light spot based on a shack-Hartmann wavefront aberration principle, obtain the center of mass position edge difference between an actual light spot and a theoretical light spot, obtain a corresponding wavefront slope through geometrical optics, obtain the wavefront aberration of each light spot through the center of mass position edge difference, obtain a corresponding Zernike coefficient according to the wavefront slope and the wavefront difference, and obtain the diopter detection result of the human eyes to be measured according to the Zernike coefficient.
In addition, the embodiment of the invention also provides a computer optometry unit which comprises the diopter measurement system.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A diopter measurement system, characterized in that it comprises: the adjustable vision fixation lamp, the semi-transparent semi-reflecting mirror, the vibrating mirror, the scanning objective lens group, the reflecting mirror, the collimating lens and the wavefront aberration detector;
the semi-transparent semi-reflecting mirror reflects the measuring light emitted by the adjustable vision fixing lamp to the vibrating mirror;
the galvanometer reflects the measuring light to the scanning objective lens group and projects the measuring light to human eyes through the scanning objective lens group so that the human eyes reflect wavefront signal light;
the scanning objective lens group projects the wavefront signal light reflected by the human eyes to the galvanometer;
the galvanometer projects the wavefront signal light to the reflector through the semi-transparent semi-reflecting mirror;
the reflector projects the wavefront signal light to the wavefront aberration detector through the collimating lens;
the wavefront aberration detector detects diopter of the human eyes according to the wavefront signal light;
wherein, the projection position of the wave front signal light to the human eye is determined by the reflection angle of the galvanometer and the emission angle of the adjustable vision fixation lamp.
2. The diopter measurement system of claim 1, wherein said half mirror is disposed in an optical path between said galvanometer and said mirror, and said collimating lens is disposed in an optical path between said mirror and said wavefront aberration detector.
3. A diopter measurement method applied to a diopter measurement system according to claim 1 or 2, characterized in that said method comprises the steps of:
determining a target acquisition point of a to-be-detected area based on a diopter measurement system, and traversing the target acquisition point by adjusting the space coordinate of a galvanometer;
determining the space coordinate of the current reflection angle of the galvanometer according to the target acquisition point obtained by each traversal;
performing position association according to the obtained space coordinates and the corresponding target acquisition points;
and carrying out diopter detection on the eye to be detected through the position correlation result based on the diopter measurement system.
4. A diopter measurement method according to claim 3, characterized in that said step of determining the target acquisition points of the area to be detected on the basis of a diopter measurement system comprises:
determining a central point of a to-be-detected area based on a diopter measurement system;
performing area division according to a preset range based on the central point;
and determining a target acquisition point according to the region division result.
5. A diopter measurement method according to claim 4, characterized in that said step of associating the position according to the obtained spatial coordinates and the corresponding target acquisition point is preceded by a further step of:
establishing a preset coordinate system according to the region division result;
taking the target acquisition points in the preset direction as marked acquisition points based on the preset coordinate system;
correspondingly, the step of performing position association according to the obtained spatial coordinates and the corresponding target acquisition points includes:
fitting according to the obtained space coordinates and the corresponding mark acquisition points to obtain a fitting model;
and obtaining the space coordinates corresponding to the target acquisition points according to the fitting model, and performing position association on the target acquisition points and the corresponding space coordinates.
6. The diopter measurement method of claim 5, wherein said step of obtaining the spatial coordinates corresponding to said target collection point according to said fitted model and associating the position of said target collection point with the corresponding spatial coordinates further comprises, before said step of:
determining residual acquisition points according to the target acquisition points and the marked acquisition points;
correspondingly, the step of obtaining the spatial coordinates corresponding to the target acquisition points according to the fitting model and performing position association on the target acquisition points and the corresponding spatial coordinates comprises the following steps:
obtaining space coordinates corresponding to the residual acquisition points according to the fitting model;
and carrying out position association on the residual acquisition points and the corresponding space coordinates and the marked acquisition points and the corresponding space coordinates.
7. The diopter measurement method according to any one of claims 3 to 6, wherein said step of diopter detection of human eye to be measured based on said diopter measurement system through the position correlation result comprises:
projecting measuring light to the human eye to be measured through a position correlation result based on the diopter measuring system;
receiving wavefront signal light reflected by the human eyes to be detected, and obtaining corresponding wavefront slope and wavefront aberration according to the wavefront signal light;
and obtaining a diopter detection result of the eye to be detected according to the wavefront slope and the wavefront aberration.
8. A diopter measurement method according to claim 7, wherein said step of receiving the wavefront signal light reflected by the human eye to be measured further comprises, after said step of receiving:
filtering the received wavefront signal light to obtain filtered wavefront signal light;
correspondingly, the step of obtaining the corresponding wavefront slope and wavefront aberration according to each wavefront signal light includes:
and obtaining corresponding wavefront slope and wavefront aberration according to the filtered wavefront signal light.
9. A diopter measurement method according to claim 8, wherein said step of filtering each received wavefront signal light to obtain a filtered wavefront signal light comprises:
carrying out characteristic identification on each received wavefront signal light to obtain effective signal light spots;
carrying out region division on the obtained effective signal light spots, and obtaining the distance between the centroids of the effective signal light spots of adjacent regions;
judging whether the distance between the effective signal light spot centroids of the adjacent areas exceeds a preset threshold value or not;
and if not, taking the effective signal light spots of the adjacent areas as the filtered wavefront signal light.
10. A computer refractometer, characterized in that it comprises a diopter measurement system according to claim 1 or 2.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000032086A1 (en) * | 1998-12-02 | 2000-06-08 | Ji Cang He | An instrument and a method for measuring the aberration of human eyes |
| US20140055749A1 (en) * | 2006-01-20 | 2014-02-27 | Clarity Medical Systems, Inc. | Apparatus and method for operating a real time large diopter range sequential wavefront sensor |
| CN105662332A (en) * | 2016-04-13 | 2016-06-15 | 南京航空航天大学 | Wide-angle eye ground retina imaging device and method for annular illumination |
| JP2018100923A (en) * | 2016-12-21 | 2018-06-28 | キヤノン株式会社 | Light irradiation device, light irradiation method and light irradiation program |
| CN109512380A (en) * | 2018-11-02 | 2019-03-26 | 爱尔眼科医院集团股份有限公司 | The method for making full retina dioptric topographic map based on wavefront sensing technique |
| CN109770844A (en) * | 2019-03-01 | 2019-05-21 | 中北大学 | A kind of human eye diopter detection device |
| CN111110184A (en) * | 2020-01-07 | 2020-05-08 | 天津市眼科医院 | Peripheral retinal aberration optical measurement system based on Hartmann-Shack wavefront aberration measuring instrument |
| CN111772574A (en) * | 2020-06-06 | 2020-10-16 | 宁波明星科技发展有限公司 | Method and device for eliminating defocusing during wavefront aberration measurement |
| CN113616152A (en) * | 2021-07-29 | 2021-11-09 | 爱尔眼科医院集团股份有限公司 | Ophthalmological instrument for measuring the optical quality of an eye |
| CN113749608A (en) * | 2021-08-11 | 2021-12-07 | 深圳湾实验室 | Human eye wavefront aberration detection system |
| CN114159020A (en) * | 2021-11-17 | 2022-03-11 | 佛山市灵觉科技有限公司 | Refractometer, ophthalmological biological multi-parameter measuring instrument and measuring method |
-
2022
- 2022-11-04 CN CN202211373195.5A patent/CN115414000B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000032086A1 (en) * | 1998-12-02 | 2000-06-08 | Ji Cang He | An instrument and a method for measuring the aberration of human eyes |
| US20140055749A1 (en) * | 2006-01-20 | 2014-02-27 | Clarity Medical Systems, Inc. | Apparatus and method for operating a real time large diopter range sequential wavefront sensor |
| CN105662332A (en) * | 2016-04-13 | 2016-06-15 | 南京航空航天大学 | Wide-angle eye ground retina imaging device and method for annular illumination |
| JP2018100923A (en) * | 2016-12-21 | 2018-06-28 | キヤノン株式会社 | Light irradiation device, light irradiation method and light irradiation program |
| CN109512380A (en) * | 2018-11-02 | 2019-03-26 | 爱尔眼科医院集团股份有限公司 | The method for making full retina dioptric topographic map based on wavefront sensing technique |
| CN109770844A (en) * | 2019-03-01 | 2019-05-21 | 中北大学 | A kind of human eye diopter detection device |
| CN111110184A (en) * | 2020-01-07 | 2020-05-08 | 天津市眼科医院 | Peripheral retinal aberration optical measurement system based on Hartmann-Shack wavefront aberration measuring instrument |
| CN111772574A (en) * | 2020-06-06 | 2020-10-16 | 宁波明星科技发展有限公司 | Method and device for eliminating defocusing during wavefront aberration measurement |
| CN113616152A (en) * | 2021-07-29 | 2021-11-09 | 爱尔眼科医院集团股份有限公司 | Ophthalmological instrument for measuring the optical quality of an eye |
| CN113749608A (en) * | 2021-08-11 | 2021-12-07 | 深圳湾实验室 | Human eye wavefront aberration detection system |
| CN114159020A (en) * | 2021-11-17 | 2022-03-11 | 佛山市灵觉科技有限公司 | Refractometer, ophthalmological biological multi-parameter measuring instrument and measuring method |
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Application publication date: 20221202 Assignee: Hunan Jiuchen Intelligent Medical Equipment Co.,Ltd. Assignor: Beijing jiuchen intelligent medical equipment Co.,Ltd. Contract record no.: X2023980043043 Denomination of invention: Diopter measurement system, method, and computer refractometer Granted publication date: 20230407 License type: Common License Record date: 20231008 |
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