Vision screening instrument
By using reflectors to fold the optical path and designing an ergonomic detection window in the vision screener, the problem of large size and inconvenience in carrying the equipment is solved, and the portability and comfort are improved.
Patent Information
- Application Number
- CN202411159438.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2024-12-27
AI Technical Summary
The existing vision screening device is large in size and inconvenient to carry, which affects its portability and comfort in practical applications.
By setting up three reflectors in the vision screener to fold the light path, reduce the volume of the equipment, and design the detection window on the upper part of the housing, and combine it with the imaging lens group and image sensor to form a structure suitable for ergonomic design, which is convenient for Carry and use.
It achieves the reduction of the equipment size and is easy to carry, while improving the comfort and detection accuracy of the person being tested, complying with ergonomic design, and improving the convenience of the equipment.
Smart Images
Figure CN119184607A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and in particular to a vision screening instrument. Background Art
[0002] A vision screener is a device used to detect the refractive state of the human eye. It uses a light source to project into the pupil. The light reflected by the pupil will present different images under different refractive states. The pupil image is captured and then processed to obtain the refractive data such as the spherical diameter, cylindrical diameter and axial position of both eyes. It has the advantages of being automatic, non-destructive, fast and effective. However, existing vision screeners have the problem of being large in size and inconvenient to carry. Summary of the invention
[0003] The main purpose of the present invention is to provide a vision screening instrument, aiming to improve the problem that the existing vision screening instruments are large in size and inconvenient to carry.
[0004] To achieve the above-mentioned purpose, the vision screening device proposed by the present invention comprises:
[0005] A housing, wherein a detection window is provided on the upper portion of the housing;
[0006] A camera module is disposed in the housing and located at the lower part of the housing, wherein the camera module includes an image sensor and an imaging lens group sequentially disposed along an optical axis thereof;
[0007] a light source, disposed in the housing and located on a side of the imaging lens assembly away from the image sensor; and
[0008] The reflector group is arranged in the shell, and the reflector group includes a first reflector, a second reflector and a third reflector, and is used to fold the light path in the shell.
[0009] In one embodiment, the camera module further includes an aperture, and the aperture is disposed between the imaging lens group and the light source.
[0010] In one embodiment, the upper end of the first reflector is inclined in a direction away from the light source, and the angle between the first reflector and the optical axis of the camera module is 70° to 82.5°;
[0011] The upper end of the second reflector is inclined toward the first reflector, and the angle between the second reflector and the optical axis of the camera module is 70° to 82.5°;
[0012] The upper end of the third reflector is inclined away from the second reflector, and the angle between the third reflector and the optical axis of the camera module is 70° to 82.5°.
[0013] In one embodiment, the angle between the first reflector and the optical axis of the camera module is 75°, the angle between the second reflector and the optical axis of the camera module is 75°, and the angle between the third reflector and the optical axis of the camera module is 75°.
[0014] In one embodiment, at least two of the first reflector, the second reflector and the third reflector are arranged in parallel.
[0015] In one embodiment, the distance from the imaging lens group to the first reflector is a, the distance from the first reflector to the second reflector is b, the distance from the second reflector to the third reflector is c, and the distance from the third reflector to the detection window is d, wherein 980mm≤a+b+c+d≤1020mm.
[0016] In one embodiment, a=160 mm, b=250 mm, c=250 mm, and 320 mm≤d≤360 mm.
[0017] In one embodiment, the vision screening instrument further comprises a shading plate, wherein the shading plate is disposed in the housing and located between the third reflector and the detection window to block stray light.
[0018] In one embodiment, a forehead rest is provided at the periphery of the detection window for positioning the eyes.
[0019] In one embodiment, a touch display screen is provided on the outer side wall of the housing.
[0020] In the technical solution of the present invention, when performing detection, the eyes of the person being detected are aligned with the detection window, and the light beam emitted by the light source is reflected by the first reflector and reaches the second reflector, and then is reflected by the second reflector and reaches the third reflector, and then is reflected by the third reflector. The reflected light passes through the detection window and enters the human eye, forming a pupil image; the light beam reflected by the pupil is then reflected by the third reflector, the second reflector and the first reflector in turn, and then enters the imaging lens group, and then the pupil image is displayed through the image sensor; the technical solution of the present invention folds the light path by setting three reflectors, which can reduce the size of the device and facilitate carrying. At the same time, the detection window is set at the upper part of the shell, which is more ergonomically designed and more comfortable for the person being detected. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 A schematic diagram of the internal structure of an embodiment of a vision screening device provided by the present invention;
[0023] Figure 2 A three-dimensional schematic diagram of an embodiment of a vision screening device provided by the present invention.
[0024] Description of Figure Numbers:
[0025] 100. Vision screener; 1. Shell; 11. Detection window; 12. Forehead rest; 13. Touch screen; 14. Shutter button; 15. Equipment switch; 2. Light source; 3. Camera module; 31. Image sensor; 32. Imaging lens group; 33. Aperture; 4. Reflector group; 41. First reflector; 42. Second reflector; 43. Third reflector; 5. Sunshade; 200. Human eye.
[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0030] A vision screener is a device used to detect the refractive state of the human eye. It uses a light source to project into the pupil. The light reflected by the pupil will present different images under different refractive states. The pupil image is captured and then processed to obtain the refractive data such as the spherical diameter, cylindrical diameter and axial position of both eyes. It has the advantages of being automatic, non-destructive, fast and effective. However, existing vision screeners have the problem of being large in size and inconvenient to carry.
[0031] The present invention provides a vision screening instrument, which can reduce the size of the device, is easy to carry, and provides a higher level of comfort for the person being tested. Figure 1 A schematic diagram of the internal structure of an embodiment of a vision screening device provided by the present invention; Figure 2 A three-dimensional schematic diagram of an embodiment of a vision screening device provided by the present invention.
[0032] See also Figure 1 and Figure 2 In one embodiment of the present invention, the vision screening instrument 100 includes a housing 1, a camera module 3, a light source 2 and a reflector group 4. The upper portion of the housing 1 is provided with a detection window 11. The camera module 3 is arranged in the housing 1 and is located at the lower portion of the housing 1. The camera module 3 includes an image sensor 31 and an imaging lens group 32 (such as Figure 1 As shown, the Z direction is the optical axis of the camera module 3); the light source 2 is arranged in the shell 1 and is located on the side of the imaging lens group 32 away from the image sensor 31; the reflector group 4 is arranged in the shell 1, and the reflector group 4 includes a first reflector 41, a second reflector 42 and a third reflector 43, which are used to fold the light path in the shell 1.
[0033] In the technical solution of the present invention, when performing detection, the eyes of the person being detected are aligned with the detection window 11, and the light beam emitted by the light source 2 is reflected by the first reflector 41 and reaches the second reflector 42, and then is reflected by the second reflector 42 and reaches the third reflector 43, and then is reflected by the third reflector 43, and the reflected light passes through the detection window 11 and enters the human eye 200, which will form a pupil image; the light beam reflected by the pupil is then reflected by the third reflector 43, the second reflector 42 and the first reflector 41 in turn, and then enters the imaging lens group 32, and then the pupil image is displayed through the image sensor 31; the technical solution of the present invention folds the light path by setting three reflectors, which can reduce the size of the device and facilitate carrying. At the same time, the detection window 11 is set at the upper part of the shell 1, which is more ergonomically designed and more comfortable for the person being detected.
[0034] It can be understood that the light source 2 can be a lighting lamp group, and the first reflector 41, the second reflector 42 and the third reflector 43 are all plane reflectors; the first reflector 41 is located on the side of the light source 2 away from the imaging lens group 32, the reflecting surface of the first reflector 41 is set relative to the light source 2, the reflecting surface of the second reflector 42 is set relative to the reflecting surface of the first reflector 41, the reflecting surface of the third reflector is set relative to the reflecting surface of the second reflector 42, and is set relative to the detection window 11 to fold the light path in the shell 1.
[0035] In the embodiment of the present invention, the camera module 3 further includes an aperture 33, and the aperture 33 is disposed between the imaging lens group 32 and the light source 2. The aperture 33 can limit the imaging light beam to improve the quality of imaging.
[0036] In the embodiment of the present invention, the upper end of the first reflector 41 is inclined in a direction away from the light source 2, and the angle between the first reflector 41 and the optical axis of the camera module 3 is 70° to 82.5°; the upper end of the second reflector 42 is inclined toward the first reflector 41, and the angle between the second reflector 42 and the optical axis of the camera module 3 is 70° to 82.5°; the upper end of the third reflector 43 is inclined away from the second reflector 42, and the angle between the third reflector 43 and the optical axis of the camera module 3 is 70° to 82.5°. The first reflector 41, the second reflector 42 and the third reflector 43 are set in the above-mentioned angle range, and each reflection can deflect the light beam by 15° to 40°, which is conducive to reducing the volume of the device while achieving the reflection effect, and the angle of the light beam emitted from the detection window 11 is also more appropriate, which is conducive to improving the comfort of the person being detected. It can be understood that the setting angle of the detection window 11 can be adapted to the reflector group 4 to ensure the detection accuracy and the comfort of the person being detected.
[0037] Further, in the embodiment of the present invention, the angle between the first reflector 41 and the optical axis of the camera module 3 is 75°, the angle between the second reflector 42 and the optical axis of the camera module 3 is 75°, and the angle between the third reflector 43 and the optical axis of the camera module 3 is 75°. The first reflector 41, the second reflector 42, and the third reflector 43 are set at the above angles, and each reflection can deflect the light beam by 30°, which makes the device smaller in size and the angle of the light beam emitted from the detection window 11 is more suitable, which is conducive to further improving the comfort of the person being detected.
[0038] In an embodiment of the present invention, at least two of the first reflector 41, the second reflector 42, and the third reflector 43 are arranged in parallel. The at least two reflectors are arranged in parallel for easy assembly. It can be understood that at least two of the first reflector 41, the second reflector 42, and the third reflector 43 are arranged in parallel, and the first reflector 41 and the second reflector 42 can be arranged in parallel, the first reflector 41 and the third reflector 43 can be arranged in parallel, the second reflector 42 and the third reflector 43 can be arranged in parallel, and the first reflector 41, the second reflector 42, and the second reflector 42 can also be arranged in parallel with each other.
[0039] In the embodiment of the present invention, the distance between the imaging lens group 32 and the first reflector 41 is a, the distance between the first reflector 41 and the second reflector 42 is b, the distance between the second reflector 42 and the third reflector 43 is c, and the distance between the third reflector 43 and the detection window 11 is d, wherein 980 mm ≤ a + b + c + d ≤ 1020 mm. With the above distances, the length of the optical path from the human eye 200 to the imaging lens group 32 can be about 1000 mm, which can ensure the quality of imaging. It can be understood that the distance from the imaging lens group 32 to the first reflector 41 is the distance from the center of the side of the imaging lens group 32 close to the first reflector 41 to the center of the first reflector 41, the distance from the first reflector 41 to the second reflector 42 is the distance from the center of the first reflector 41 to the center of the second reflector 42, the distance from the second reflector 42 to the third reflector 43 is the distance from the center of the second reflector 42 to the center of the third reflector 43, and the distance from the third reflector 43 to the detection window 11 is the distance from the center of the third reflector 43 to the center of the detection window 11.
[0040] Furthermore, in the embodiment of the present invention, a=160mm, b=250mm, c=250mm, 320mm≤d≤360mm. The positions of the first reflector 41, the second reflector 42, and the third reflector 43 are more appropriately arranged, which can further reduce the size of the device while ensuring the quality of imaging.
[0041] In an embodiment of the present invention, the vision screening instrument 100 further includes a shading plate 5, which is disposed in the housing 1 and between the third reflector 43 and the detection window 11 to block stray light. The shading plate 5 blocks stray light (stray light includes useless light from the light source 2 and stray light in the reflection process), which can improve the quality of imaging. It can be understood that the shading plate 5 does not interfere with the light path in the housing 1.
[0042] In the embodiment of the present invention, a forehead rest 12 is provided on the periphery of the detection window 11 for positioning the eyes. The forehead rest 12 can stabilize the eyes of the person being detected, which is beneficial to ensure the quality of imaging.
[0043] In an embodiment of the present invention, a touch screen 13 is provided on the outer side wall of the housing 1. It is more convenient to operate and view through the touch screen 13. Further, in an embodiment of the present invention, the touch screen 13 can be a folding touch screen 13, and the touch screen 13 can be turned over to face the person being tested, so that the person being tested can operate and view.
[0044] In the embodiment of the present invention, a shutter key 14 is disposed on the outer wall of the housing 1. By disposing the shutter key 14 on the housing 1, the operation of taking pictures by the camera module is more convenient.
[0045] In the embodiment of the present invention, the outer side wall of the housing 1 is provided with a device switch 15. By providing the device switch 15 on the housing 1, the operation of starting and shutting down the device is more convenient.
[0046] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A vision screening instrument, characterized in that: include: A housing, wherein a detection window is provided on the upper portion of the housing; A camera module is disposed in the housing and located at the lower part of the housing, wherein the camera module includes an image sensor and an imaging lens group sequentially disposed along an optical axis thereof; a light source, disposed in the housing and located on a side of the imaging lens assembly away from the image sensor; and The reflector group is arranged in the shell, and the reflector group includes a first reflector, a second reflector and a third reflector, and is used to fold the light path in the shell.
2. The vision screening instrument according to claim 1, characterized in that: The camera module also includes an aperture, which is arranged between the imaging lens group and the light source.
3. The vision screening instrument according to claim 1, characterized in that: The upper end of the first reflector is inclined in a direction away from the light source, and the angle between the first reflector and the optical axis of the camera module is 70° to 82.5°; The upper end of the second reflector is inclined toward the first reflector, and the angle between the second reflector and the optical axis of the camera module is 70° to 82.5°; The upper end of the third reflector is inclined away from the second reflector, and the angle between the third reflector and the optical axis of the camera module is 70° to 82.5°.
4. The vision screening instrument according to claim 3, characterized in that: The included angle between the first reflector and the optical axis of the camera module is 75°, the included angle between the second reflector and the optical axis of the camera module is 75°, and the included angle between the third reflector and the optical axis of the camera module is 75°.
5. The vision screening instrument according to claim 1, characterized in that: At least two of the first reflector, the second reflector and the third reflector are arranged in parallel.
6. The vision screening instrument according to claim 1, characterized in that: The distance from the imaging lens group to the first reflector is a, the distance from the first reflector to the second reflector is b, the distance from the second reflector to the third reflector is c, and the distance from the third reflector to the detection window is d, wherein 980mm≤a+b+c+d≤1020mm.
7. The vision screening instrument according to claim 6, characterized in that: a=160mm, b=250mm, c=250mm, 320mm≤d≤360mm.
8. The vision screening instrument according to claim 1, characterized in that: The vision screening instrument further includes a shading plate, which is disposed in the housing and located between the third reflector and the detection window to block stray light.
9. The vision screening instrument according to claim 1, characterized in that: A forehead rest is arranged on the periphery of the detection window for positioning the eyes.
10. The vision screening instrument according to claim 1, characterized in that: The outer side wall of the shell is provided with a touch display screen.