CN214856579U - Vision detection device - Google Patents
Vision detection device Download PDFInfo
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- CN214856579U CN214856579U CN202120096833.8U CN202120096833U CN214856579U CN 214856579 U CN214856579 U CN 214856579U CN 202120096833 U CN202120096833 U CN 202120096833U CN 214856579 U CN214856579 U CN 214856579U
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- barrel
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- concave lens
- viewing frame
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- 230000004438 eyesight Effects 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 title abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 230000005484 gravity Effects 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 39
- 238000000034 method Methods 0.000 abstract description 21
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000004304 visual acuity Effects 0.000 description 8
- 238000012937 correction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 206010012689 Diabetic retinopathy Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Abstract
The utility model discloses an eyesight detecting device, which is provided with a cylinder body and a connecting component; one end of the barrel is provided with an ocular lens, and the end part is suitable for being attached to the eyes; a viewing frame is arranged below the barrel, at least three conductor points are arranged on the edge of the bottom layer of the viewing frame, and the gravity centers of the three conductor points are superposed with the center of the viewing frame; a concave lens is arranged in the cylinder body; the connecting component is used for fixing the barrel on an intelligent terminal, and the viewing frame is attached to a screen of the intelligent terminal; the distance between the concave lens and the screen is an object distance, the focal length of the concave lens is larger than the object distance, and the sum of the image distance and the distance from one end of the barrel to the concave lens is a specified distance for vision determination. Through the utility model discloses, can carry out visual detection anytime and anywhere cheaply, the testing process standard can realize accurate visual detection moreover, plays fine supporting role to the management of eyesight (including prevention and control, supervision).
Description
Technical Field
The utility model relates to a look optical instrument and optometry technical field especially relate to an eyesight detection device.
Background
At present, most of vision tests are performed by using visual charts, and the vision tests can be performed only in fixed places, large spaces and environments with standard visual chart brightness, and at present, the vision tests are generally performed in places such as hospitals and spectacle shops. Because the vision detection needs to be specially carried out in a fixed place, the detection is carried out when people feel that the vision is possibly problematic, and the passive detection leads to that the vision is not responded but can not be prevented and controlled in advance. If the vision test can be self-tested at any time and any place without being limited to specific environments and facilities, the vision test is a very favorable support in the aspect of vision protection and the aspect of preventing and controlling vision problems.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made in order to provide a solution that overcomes or at least partially solves the above mentioned problems. Accordingly, in one aspect of the present invention, there is provided a vision testing device having a barrel and a connecting member; one end of the barrel is provided with an ocular lens, and the end part is suitable for being attached to the eyes; a viewing frame is arranged below the barrel, at least three conductor points are arranged on the edge of the bottom layer of the viewing frame, and the gravity centers of the three conductor points are superposed with the center of the viewing frame; a concave lens is arranged in the cylinder body; the connecting component is used for fixing the barrel on an intelligent terminal, and the viewing frame is attached to a screen of the intelligent terminal; the distance between the concave lens and the screen is an object distance, the focal length of the concave lens is larger than the object distance, and the sum of the image distance and the distance from one end of the barrel to the concave lens is a specified distance for vision determination.
Optionally, the barrel is telescopic.
Optionally, the eyepiece is a predetermined distance away from one end of the barrel, and one end of the barrel is horn-shaped.
Optionally, the three conductor points form an isosceles triangle.
Optionally, the three conductor points form an equilateral triangle.
Optionally, the flat mirror is a surface mirror.
The technical scheme provided by the application at least has the following technical effects or advantages: the vision detection device is convenient to carry, combines the application that the intelligent terminal of extensive use operation corresponds, can carry out vision detection anytime and anywhere cheaply, and the testing process standard can realize accurate vision detection moreover, plays fine supporting role to the management of eyesight (including prevention and control, supervision).
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention can be implemented according to the content of the description, and in order to make the technical solutions of the present invention and the objects, features, and advantages thereof more obvious and understandable, the following embodiments of the present invention are described specifically.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1a and 1b show a structure diagram of the vision testing device provided by the present invention;
fig. 2 shows an optical path diagram of the vision inspection device proposed by the present invention;
FIG. 3 shows the process of correcting and displaying the sighting target image based on the vision detection device by the intelligent terminal;
fig. 4 shows and utilizes the utility model provides a vision detection device combines intelligent terminal to carry out vision detection's process.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As proved in the technical operating Specification for visual acuity test, the visual acuity test chart can be selected from a logarithmic visual acuity test chart, an international standard visual acuity test chart and an ETDRS (early treatment diabetic retinopathy research) visual acuity test chart, the examination distance of the first two visual acuity test charts is 5m, and the examination distance of the latter visual acuity test chart is 4m, so that the existing visual acuity test charts require spacious physical space. The technical operating specification of vision examination requires that 1.0 line of the visual chart should be as high as the eye to be examined, however, the visual charts are fixed on the wall, and the height of the person to be examined is different, and the difference is large, so that the requirement is difficult to meet in the actual vision examination. The technical operating specification of vision examination also requires that the illumination of the visual chart should be uniform and free of glare, if manual illumination is used, the illumination intensity should be 300-.
The utility model discloses on aiming at accord with the basis of above-mentioned standard, provide one kind can not be subject to the physics space, can conveniently, accurately carry out visual detection's device and method again. The utility model discloses in the eyesight detection device that provides be an independent product or equipment. When the eyesight is detected, the method needs to be matched with an app running on the intelligent terminal for use. The intelligent terminal can provide stable sighting target image backlight brightness and sighting target patterns meeting requirements.
In one aspect of the present invention, there is provided a vision testing device, as shown in fig. 1a and 1b, the device has a barrel 1 and a connecting member 2, one end of the barrel is provided with an ocular lens 3, and the end is suitable for fitting with the eye; a viewing frame 4 is arranged at the other end below the barrel, at least three conductor points 6, 7 and 8 are arranged on the edge of the bottom layer of the viewing frame, and the gravity centers of the three conductor points are superposed with the center of the viewing frame; a concave lens 5 is arranged in the cylinder; the connecting component 2 is used for fixing the barrel 1 on an intelligent terminal, and the view-finding frame 4 is attached to a screen of the intelligent terminal; the distance between the concave lens 5 and the screen is an object distance, the focal length of the concave lens is larger than the object distance, and the sum of the image distance and the distance from one end of the barrel to the concave lens is a specified distance for vision determination.
According to the imaging principle of the concave lens, as shown in fig. 2, when the object distance is within the focal distance, an enlarged erect real image can be formed on the same side relative to the concave lens, and the image distance of the real image is greater than the object distance, that is, the distance from the erect real image to the concave lens is greater than the distance from the concave lens to the screen. When the object distance is equal to the focal length, the image distance is infinity. The utility model discloses utilize above-mentioned principle, install concave lens in the barrel near the one end of framing frame. The distance between the concave lens and the view frame, namely the object distance, is adjusted by selecting the concave lens with proper focal length, so that the length of the barrel and the image distance are equal to the testing distance specified in the technical operating specification of vision examination. When the object distance, the image distance and the focal length of the concave lens are respectively represented as u, v and f, the three have the following relationship:
1/u+1/v＝1/f
the sighting target image specified in the visual inspection technical operation standard is obtained by amplifying the sighting target image displayed on the intelligent terminal, so that the sighting target image displayed on the intelligent terminal is smaller than the standard sighting target image. The real image can be seen by human eyes, the image distance of the real image is larger than the object distance, so that people can feel like seeing the actual image, and the technical effect that the visual distance of the real image of the sighting target image seen by a user can reach 5 meters is achieved through the barrel with the limited length by means of the characteristic that the image distance is far larger than the object distance.
As a preferred embodiment, in order to make the whole vision testing device smaller, the size of the barrel body is smaller, and the barrel body is of a telescopic structure.
In use, an eye of a person is positioned against one end of the barrel, looking inwardly, said one end of the barrel preferably being flared in order to allow the eye to better engage said one end of the barrel.
In order to avoid dust or other things falling into the barrel and dirtying the plane mirror and the inside of the barrel, the eyepiece is arranged in the barrel close to the end, plane transparent glass can be selected as the eyepiece, the eyepiece is arranged close to the position of one end of the barrel in order to clean the surface of the eyepiece close to one side of human eyes, and the eyepiece is far away from the preset distance of one end of the barrel and cannot be arranged in a too deep place.
The other end of the vision detection device is provided with a viewing frame 4 and a connecting component 2, and the barrel is fixed on the mobile phone screen through the connecting component 2, so that the viewing frame is attached to the mobile phone screen.
During the use, open visual detection app on the intelligent terminal at first after, fix the visual detection device on the intelligent terminal screen through connecting device again. The intelligent terminal collects the positions of the at least three conductor points, determines the display position of the pre-stored sighting target image based on the positions of the conductor points, and displays the sighting target image.
Because the vision detection device is used with the app on the intelligent terminal in a matched manner, the sighting target image displayed on the screen of the intelligent terminal is required to be just displayed in the viewing frame of the vision detection device. When the vision inspection device is fixed on the screen, the position fixed on the screen is difficult to be accurately fixed, but the visual target image on the screen needs to be displayed in the visual frame. The utility model discloses in, through set up not at the three conductor point of a straight line on the frame of finding a view, fixed and when laminating on the intelligent terminal screen of frame of finding a view, these three conductor point can be discerned to the intelligent terminal to the position of the sighting mark image that the position correction that the intelligent terminal detected according to the three conductor point shows carries out the visual detection process again.
As shown in fig. 3, the vision testing method using the vision testing apparatus is implemented by the intelligent terminal executing a software program, and includes the following steps:
s1, detecting position information of the at least three conductor point contacts with a screen;
s2, determining the display position of the sighting target image based on the position information;
s3, sequentially displaying the visual target images corresponding to the visual force values according to the determined display positions;
s4, receiving user input;
s5, analyzing whether the user input is matched with the attribute of the displayed sighting target image, if so, determining that the test is correct, otherwise, determining that the test is wrong; and determining the visual force value according to the test result corresponding to each visual force value.
The step S2 determines the display position of the optotype image based on the position information, and specifically includes the following steps, as shown in fig. 4:
s21, determining a triangular gravity center point formed by the three conductor points according to the position information of the three conductor points contacting the screen;
s22, calibrating the central point display position of the sighting mark image based on the gravity center point;
s23, determining the display position of the forward marking of the sighting mark image according to the gravity center point and the position information corresponding to a preset conductor point;
and S24, sequentially displaying the pre-stored sighting target images based on the calibrated central point display position and the calibrated forward marking display position.
Through the steps, as long as the viewing frame is placed on the screen of the intelligent terminal, the sighting target image can be guaranteed to be displayed under the viewing frame, so that the viewing frame is not limited to be placed, and the operation and the use are convenient. As can be seen from the above correction process, in order to simplify the calculation process of the position of the center of gravity, as one preferred embodiment, the three conductor points constitute an equilateral triangle, and as another preferred embodiment, the three conductor points constitute an isosceles triangle other than the equilateral triangle.
As a second correction method for the visual target image display, the correction process includes the steps of:
determining a straight line where the first conductor point and the second conductor point are located;
aligning the straight line with a positioning reference line of the sighting target images, wherein at least one sighting target image is provided with the positioning reference line and positioning reference point information;
aligning a third conductor point with the positional reference point;
and sequentially displaying the pre-stored sighting target images according to the alignment result.
In this calibration method, the order of the calibration of the reference line and the calibration of the reference point is not limited.
As a third correction mode of the sighting target image display, the correction process comprises the following steps:
collecting the position of a conductor point, and determining a first conductor point, a second conductor point and a third conductor point;
matching a first positioning reference point of the sighting target image with a first conductor point, wherein three positioning reference points are stored corresponding to each sighting target image;
matching the second positioning reference point and the third reference point of the sighting mark image with a second conductor point and a third conductor point respectively;
and sequentially displaying the pre-stored sighting target images based on the three-point matching result.
After the display position and the display direction of the sighting target image are corrected, a voice prompt or other prompt tones can be sent out, the vision testing process is started, and the step S3 is executed.
And displaying the visual target images according to the visual values from low to high, and displaying a preset number of visual target images corresponding to each visual value. The attributes of the sighting target image comprise left, right, upper and lower.
The optotype image corresponding to the category may be displayed as the first optotype image according to the vision value input by the user, or the optotype image corresponding to the lowest vision value may be displayed as the first optotype image by default according to a program.
In the process of testing and analyzing, the following steps are carried out:
s4, receiving user input;
s5, analyzing whether the user input is matched with the attribute of the displayed sighting target image, if so, determining that the test is correct, otherwise, determining that the test is wrong; and determining the visual force value according to the test result corresponding to each visual force value.
If the first visual target image is displayed according to the input visual force value of the user, in S5, if the number of times of correct testing reaches a predetermined threshold, controlling to display a visual target image corresponding to a second visual force value, which is higher than the first visual force value, repeating the execution until the number of times of wrong testing reaches the predetermined threshold, and outputting the previously corresponding visual force value as a vision test result. And if the times of the test errors reach a preset threshold value, controlling to display a visual target image corresponding to a second visual force value, wherein the second visual force value is lower than the first visual force value, repeatedly executing until the times of the test errors reach the preset threshold value, and outputting the corresponding visual force value.
If the first optotype image is displayed at the default lowest vision value, in S5, if the number of times of correct testing reaches a predetermined threshold, controlling to display the optotype image corresponding to a second vision value higher than the first vision value, repeating the execution until the number of times of wrong testing reaches the predetermined threshold, and outputting the previously corresponding vision value as the vision test result.
The utility model discloses in, the sighting mark image is according to the vision value classification prestore that corresponds, and every sighting mark image corresponds the storage and has image attribute information, the attribute of sighting mark image includes left and right, upper and lower. The user can input through voice, and the intelligent terminal determines whether the user inputs left, right, up or down through recognizing and analyzing the voice. The user also can realize through the button on the eyesight detection device barrel, and button information sends intelligent terminal through wireless mode, and this just needs to set up 4 buttons on the barrel, and key-press connection wireless communication module receives the key signal moreover.
The display of the sighting target images in a vision value range can be randomly displayed or displayed according to a preset sequence. In-process of app operation, intelligent terminal is detecting behind the three conductor point, just carry out the correction of sighting mark image display position and carry out the demonstration of sighting mark image, it is unable to see the sighting mark image not through visual detection device, through the utility model provides a visual detection device and method can avoid making false to the visual detection result.
The technical scheme provided by the application at least has the following technical effects or advantages: the vision detection device is convenient to carry, combines the application that the intelligent terminal of extensive use operation corresponds, can carry out vision detection anytime and anywhere cheaply, and the testing process standard can realize accurate vision detection moreover, plays fine supporting role to the management of eyesight (including prevention and control, supervision).
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (5)
1. A vision testing device is characterized in that the device is provided with a cylinder body and a connecting component; one end of the barrel is provided with an ocular lens, and the end part is suitable for being attached to the eyes; a viewing frame is arranged below the barrel, at least three conductor points are arranged on the edge of the bottom layer of the viewing frame, and the gravity centers of the three conductor points are superposed with the center of the viewing frame; a concave lens is arranged in the cylinder body; the connecting component is used for fixing the barrel on an intelligent terminal, and the viewing frame is attached to a screen of the intelligent terminal; the distance between the concave lens and the screen is an object distance, the focal length of the concave lens is larger than the object distance, and the sum of the image distance and the distance from one end of the barrel to the concave lens is a specified distance for vision determination.
2. The vision testing device of claim 1, further characterized in that the barrel is of a telescoping construction.
3. The vision testing device of claim 1, further characterized in that said eyepiece is a predetermined distance from an end of said barrel, said barrel end being flared.
4. The vision testing device of claim 1, further characterized in that said three conductor points form an isosceles triangle.
5. The vision testing device of claim 1, further characterized in that said three conductor points form an equilateral triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120096833.8U CN214856579U (en) | 2021-01-14 | 2021-01-14 | Vision detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120096833.8U CN214856579U (en) | 2021-01-14 | 2021-01-14 | Vision detection device |
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| CN214856579U true CN214856579U (en) | 2021-11-26 |
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| CN202120096833.8U Expired - Fee Related CN214856579U (en) | 2021-01-14 | 2021-01-14 | Vision detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112741590A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Vision detection device and vision detection method |
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2021
- 2021-01-14 CN CN202120096833.8U patent/CN214856579U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112741590A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Vision detection device and vision detection method |
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Granted publication date: 20211126 |