CN116269185A - Positioning system and ophthalmic measuring device - Google Patents

Abstract

The application belongs to the technical field of medical treatment, and particularly relates to a positioning system and an ophthalmic measuring device. The application discloses positioning system, including light emitting device and reflection mechanism, reflection mechanism is located light emitting device's light-emitting side, and reflection mechanism includes first reflection module and second reflection module, and first reflection module is used for the light that reflection light emitting device sent, and second reflection module is used for the light of reflection first reflection module reflection, and the light that light emitting device sent forms the image of predetermineeing in predetermineeing the position behind reflection mechanism. The application also discloses an ophthalmic measuring device comprising a positioning system as above. According to the positioning system disclosed by the application, the light rays emitted by the light emitting mechanism form the preset image at the preset position through the reflection of at least two reflection modules in the reflection mechanism, so that a user can finish the positioning of eyeballs and testing equipment by himself under the condition of no guidance of professionals or third parties, and the self-detection process is accurately finished.

Description

Positioning system and ophthalmic measuring device

Technical Field

The application belongs to the technical field of medical treatment, and particularly relates to a positioning system and an ophthalmic measuring device.

Background

In recent years, a large number of ophthalmic examinations have become normal due to ophthalmic diseases and eye unhealthy, which cause more and more people to suffer from various diseases such as myopia, glaucoma, ocular fundus lesions, cataract, and the like. The ophthalmic examination needs to identify the positioning of eyeballs and test equipment, the traditional method needs to be completed under the guidance of the professional staff of a large hospital or a detection mechanism, and domestic ophthalmic detection equipment which is suitable for household use and is used for the self-completion detection of a tested person is fresh, so that the tested person needs to go to the hospital or the detection mechanism for completion every time, and the detection is time-consuming and labor-consuming.

Disclosure of Invention

The embodiment of the application provides a positioning system which can enable a user to finish positioning of eyeballs and test equipment.

The embodiment of the application provides a positioning system, including luminous mechanism and reflection mechanism, reflection mechanism is located luminous mechanism's light-emitting side, and reflection mechanism includes first reflection module and second reflection module, and first reflection module is used for the light that reflection luminous mechanism sent, and second reflection module is used for the light of reflection first reflection module reflection, and the light that luminous mechanism sent forms the image in predetermineeing the position behind reflection mechanism.

According to an embodiment of the first aspect of the present application, the reflection mechanism further comprises a central axis extending along the first direction, the first reflection module and the second reflection module are both arranged around the central axis, and the preset position is located on the central axis.

According to an embodiment of the first aspect of the present application, the first reflection module and the second reflection module are conical surface reflection modules or concave surface reflection modules.

According to an embodiment of the first aspect of the present application, an included angle formed between the first reflection module and the central axis is greater than 0 ° and less than or equal to 80 °.

According to an embodiment of the first aspect of the present application, the reflection mechanism further comprises a light inlet and a light outlet, the light inlet being located between the first reflection module and the light emitting mechanism in the first direction; the light outlet is positioned at one side of the second reflection module, which is away from the light emitting mechanism, in the first direction.

According to an embodiment of the first aspect of the present application, the shape of the light inlet and the light outlet on the cross section perpendicular to the central axis is the same as the preset image.

According to an embodiment of the first aspect of the present application, the reflection mechanism further includes a light blocking plate, the first reflection module and the second reflection module enclose together to form a preset path, the light inlet and the light outlet are respectively located at two ends of the preset path, and the light blocking plate is used for blocking light rays of the light path intersecting with the preset path.

According to an embodiment of the first aspect of the present application, the preset image comprises one of a circle, an elliptical ring and a polygonal ring.

According to an embodiment of the first aspect of the present application, the light emitting means comprises a light source and a light homogenizing plate, which is located between the light source and the reflecting means in the first direction.

According to an embodiment of the first aspect of the present application, the distance between the light equalizing plate and the reflecting mechanism is 0-30mm.

According to an embodiment of the first aspect of the present application, the distance between the preset position and the reflecting mechanism is 10-30mm.

In another aspect, embodiments of the present application also provide an ophthalmic measurement device including a positioning system as described above.

According to an embodiment of the first aspect of the present application, the reflection mechanism further comprises a central axis extending along the first direction; the ophthalmic measurement device further includes a probe configured to reciprocate along the central axis.

The positioning system comprises a light emitting mechanism and a reflecting mechanism, wherein the reflecting mechanism is located on the light emitting side of the light emitting mechanism, the reflecting mechanism comprises a first reflecting module and a second reflecting module, the first reflecting module is used for reflecting light rays emitted by the light emitting mechanism, the second reflecting module is used for reflecting the light rays reflected by the first reflecting module, and the light rays emitted by the light emitting mechanism are reflected by at least two reflecting modules in the reflecting mechanism to form a preset image at a preset position, so that a user can finish positioning of eyeballs and testing equipment by himself under the condition of no professional or guidance of a third party, and the self-detection process is accurately completed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

FIG. 1 is a schematic diagram of a positioning system according to some embodiments of the present application;

FIG. 2 shows a schematic structural view of an exemplary reflection mechanism;

FIG. 3 illustrates a schematic perspective view of an exemplary first and second reflective module;

FIG. 4 shows a schematic perspective view of an exemplary cone reflector module;

FIG. 5 illustrates a schematic perspective view of an exemplary concave reflector module;

FIG. 6 illustrates a schematic diagram of another exemplary positioning system;

fig. 7 shows a schematic structural diagram of a further exemplary positioning system.

Reference numerals:

10. a light emitting mechanism; 11. a light source; 12. a light equalizing plate;

20. a reflection mechanism; 21. a first reflection module; 22. a second reflection module; 23. a light inlet; 24. a light outlet; 25. a light barrier; 251. a first light barrier; 252. a second light barrier; 253. a third light barrier; 26. presetting a path;

30. a fourth light barrier;

s, presetting positions; x, a first direction; y, the central axis; z, virtual image.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The applicant finds that in the prior art, the positioning of the eyeball and the testing device needs to be identified in the ophthalmic examination, the traditional method needs to be completed under the guidance of the professional staff of a large-scale hospital end or a testing institution, and the ophthalmic testing device which is suitable for household use and is self-completed by the tested person is fresh in China, so that the tested person needs to go to the hospital or the testing institution for completion every time, and the time and the labor are wasted in the test.

In view of the above, applicant proposes a positioning system comprising a light emitting mechanism and a reflecting mechanism; the reflection mechanism is located the light-emitting side of luminous mechanism, and the reflection mechanism includes first reflection module and second reflection module, and first reflection module is used for reflecting the light that luminous mechanism sent, and the second reflection module is used for reflecting the light that first reflection module reflected, and the light that luminous mechanism sent forms the preset image in the position of predetermineeing behind reflection mechanism.

The utility model provides a positioning system, including light emitting device and reflection mechanism, reflection mechanism is located light emitting device's play light side, reflection mechanism includes first reflection module and second reflection module, first reflection module is used for the light that reflection light emitting device sent, second reflection module is used for the light that reflection first reflection module reflected, the reflection of at least two reflection modules makes light emitting device sent at preset position form the image in advance in reflection mechanism for the user can be under the circumstances of no professional or third party instruction, self completion eyeball and test equipment's location, thereby more accurate completion self-checking process.

The display module provided in the embodiments of the present application will be described with reference to the accompanying drawings. Here, the x direction in the drawing is the first direction. In the drawings, the size in the drawings is not necessarily to scale with the real size for convenience of drawing, and the broken line in the drawings represents the light irradiation direction.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a positioning system according to some embodiments of the present application; FIG. 2 shows a schematic structural view of an exemplary reflection mechanism; fig. 3 shows a schematic perspective view of an exemplary first and second reflection module.

As shown in fig. 1 to 3, the present application provides a positioning system including a light emitting mechanism 10 and a reflecting mechanism 20; the reflecting mechanism 20 is located at the light emitting side of the light emitting mechanism 10, the reflecting mechanism 20 includes a first reflecting module 21 and a second reflecting module 22, the first reflecting module 21 is used for reflecting the light emitted by the light emitting mechanism 10, the second reflecting module 22 is used for reflecting the light reflected by the first reflecting module 21, and the light emitted by the light emitting mechanism 10 forms a preset image at a preset position (s position in the figure) after passing through the reflecting mechanism 20.

Alternatively, the light emitting mechanism 10 emits light in a first direction (x direction in the drawing), and the reflecting mechanism 20 is located on one side of the light emitting mechanism 10 in the first direction x. The preset position s and the reflecting mechanism 20 are located on the same side of the light emitting mechanism 10 in the first direction x, and the preset position s refers to a position away from the light emitting mechanism 10 by a preset distance in the first direction x, and the preset distance may be a specific value or a range of values.

Alternatively, the preset position s is 10-30mm from the reflecting mechanism 20.

Alternatively, the positioning system may be used in combination with other ophthalmic measurement devices, where the position of the cornea and the positioning system is determined based on whether a predetermined image is visible when the user aims the positioning system at his cornea. When the user sees the preset image, the user can determine that the cornea of the user is in the correct position, and then the user starts the ophthalmic measuring device to complete the self-detection process, and the ophthalmic measuring device comprises but is not limited to an intraocular pressure measuring device.

Optionally, the reflection mechanism 20 may further include more reflection modules according to actual needs, and each of the reflection modules may change the angle of the light once, so that the application scenario of the reflection mechanism 20 may be improved by combining multiple reflection modules.

Alternatively, the preset image actually seen by the user is a virtual image (z in the drawing) on the line from the preset position s to the reflection mechanism 20 due to the reflection of the preset image by the reflection mechanism 20.

The positioning system provided in this embodiment includes a light emitting mechanism 10 and a reflecting mechanism 20, where the reflecting mechanism 20 is located at a light emitting side of the light emitting mechanism 10, the reflecting mechanism 20 includes a first reflecting module 21 and a second reflecting module 22, the first reflecting module 21 is used for reflecting light emitted by the light emitting mechanism 10, the second reflecting module 22 is used for reflecting light reflected by the first reflecting module 21, and the light emitted by the light emitting mechanism 10 is reflected by at least two reflecting modules in the reflecting mechanism 20 to form a preset image at a preset position s, so that a user can complete positioning of an eyeball and a testing device by himself without guidance of a professional or a third party, thereby completing a self-detection process more accurately.

In some alternative embodiments, the reflection mechanism 20 may further include a central axis (a dashed line y in the drawing) extending along the first direction x, and the first reflection module 21 and the second reflection module 22 are each disposed around the central axis y, and the preset position s is located on the central axis y.

Optionally, the light emitting mechanism 10 is also disposed around the central axis, and the light emitted by the light emitting mechanism 10 is converged on the central axis y after passing through the reflecting mechanism 20, and the convergence point on the central axis y is the preset position s.

Alternatively, the preset position s may be a spherical region or a spheroid region surrounding the convergence point.

According to the positioning system provided by the embodiment, the light reflected by the reflecting mechanism 20 is converged on the central axis y, so that the preset position s is located on the central axis y, the user can complete self-positioning in the first direction x, and the user cannot see the complete preset image when the cornea of the user deviates from the central axis in other directions, so that the positioning function of the positioning system in multiple directions is realized.

In some alternative embodiments, the preset image includes one of a circular ring, an elliptical ring, and a polygonal ring.

Alternatively, the image seen is not a complete circle when the cornea of the user is not in the preset position s in the first direction x, i.e. the cornea of the user is too close to the light emitting means 10 or too far from the light emitting means 10 in the first direction x. When the cornea of the user deviates from the central axis y in other directions, the user sees a quasi-annular or semi-annular ring with an irregular outer contour.

According to the positioning system provided by the embodiment, the user determines whether the cornea is at the preset position s through the pattern shape seen, and only when the user sees the preset image with the complete outline, the user judges that the cornea is at the preset position s, so that the self-detection process is accurately completed.

Referring to fig. 1, 4 to 6, fig. 4 is a schematic perspective view illustrating an exemplary cone-surface reflection module; FIG. 5 illustrates a schematic perspective view of an exemplary concave reflector module; fig. 6 shows a schematic structural diagram of another exemplary positioning system.

In some alternative embodiments, as shown in fig. 1, 4-6, the first and second reflective modules 21, 22 are conical or concave reflective modules.

Alternatively, the conical surface reflecting module means that the plurality of plane reflecting mirrors are arranged in a conical shape, and the plane reflecting mirror is still mainly used for reflecting light rays, so that the size of the virtual image z is not changed by the conical surface reflecting module, as shown in fig. 4. The concave reflecting module can be a regular concave curved surface of an inner sphere or a free reflecting curved surface. The concave reflective module has a converging effect on the light so that the user sees a larger ring of the preset image (i.e. virtual image z) than the actual size of the lighting mechanism 10, as shown in fig. 5.

Alternatively, the first reflecting module 21 and the second reflecting module 22 are conical reflecting modules, as shown in fig. 1.

Alternatively, one of the first reflecting module 21 and the second reflecting module 22 is a conical reflecting module, and the other is a concave reflecting module, as shown in fig. 6.

Optionally, the first reflecting module 21 and the second reflecting module 22 are concave reflecting modules.

In the positioning system provided in this embodiment, at least one of the first reflection module 21 and the second reflection module 22 is a concave reflection module, which has a converging effect on light, so that the light ring of the preset image (i.e. the virtual image z) seen by the user is larger than the actual size of the light emitting mechanism 10, the use experience of the user is improved, and the probability of visual fatigue of the user is reduced.

In some alternative embodiments, the angle formed between the first reflection module 21 and the central axis y is greater than 0 ° and less than or equal to 80 °.

Optionally, an included angle formed between the light emitted by the light emitting mechanism 10 after being reflected by the first reflecting module 21 and the central axis y is 20 ° -160 °, and an included angle formed between the light emitted by the light emitting mechanism 20 after being reflected by the second reflecting module 22 and the central axis y is an acute angle, that is, the light emitted by the light emitting mechanism is converged in a direction away from the light emitting mechanism 10 and toward the central axis y.

In some alternative embodiments, the light emitting mechanism 10 includes a light source 11 and a light-equalizing plate 12, the light-equalizing plate 12 being located between the light source 11 and the reflecting mechanism 20 in the first direction x.

Optionally, the light sources 11 are LED beads, the plurality of light sources 11 are disposed around the central axis y, and the shapes of the plurality of light sources 11 on the cross section perpendicular to the central axis y are matched with the preset image. For example, when the preset image is a ring, the plurality of light sources 11 are annularly spaced around the central axis y. The light-equalizing plate 12 is also arranged around the central axis y, and the shape of the light-equalizing plate 12 on the cross section perpendicular to the central axis y is the same as the preset image. However, the size of the image of the light-equalizing plate 12 on the cross section perpendicular to the central axis y may be different from the preset image, for example, the image of the light-equalizing plate 12 on the cross section perpendicular to the central axis y is an equal-scale enlargement or reduction of the preset image.

Alternatively, the distance between the light equalizing plate 12 and the reflecting mechanism 20 is 0-30mm.

The positioning system provided by the embodiment has the functions of circumferential Xiang Jun light and radial light condensation through the light equalizing plate 12 positioned between the light source 11 and the reflecting mechanism 20, and changes a plurality of spaced point light sources into annular light sources; by arranging the plurality of light sources 11 at annular intervals around the central axis y, the light emitted by the light emitting mechanism 10 is identical to the preset image shape.

In some alternative embodiments, the reflection mechanism 20 may further include a light inlet 23 and a light outlet 24, where the light inlet 23 is located between the first reflection module 21 and the light emitting mechanism 10 in the first direction x, and the light outlet 24 is located on a side of the second reflection module 22 facing away from the light emitting mechanism 10 in the first direction x.

Alternatively, the line between the light inlet 23 and the light source 11 is parallel to the first direction x, so that the light incident from the light inlet 23 into the reflection mechanism 20 is mostly parallel to the first direction x.

Optionally, the virtual image z is on an extension of the line where the preset position s points to the light outlet 24.

In some alternative embodiments, the shape of the light inlet 23 and the light outlet 24 in a cross section perpendicular to the central axis y is the same as the preset image.

Optionally, the light inlet 23 and the light outlet 24 are disposed around the central axis y, and the image sizes of the light inlet 23 and the light outlet 24 on the cross section perpendicular to the central axis y may be different from the preset image, for example, the images of the light inlet 23 and the light outlet 24 on the cross section perpendicular to the central axis y are enlarged or reduced in equal proportion.

The positioning system provided in this embodiment makes the light emitted from the reflection mechanism 20 have the same shape as the preset image by making the shapes of the light inlet 23 and the light outlet 24 on the cross section perpendicular to the central axis y identical to the preset image.

In some alternative embodiments, the reflection mechanism 20 may further include a light barrier 25, where the light barrier 25, the first reflection module 21 and the second reflection module 22 together enclose a preset path 26, the light inlet 23 and the light outlet 24 are located at two ends of the preset path 26, and the light barrier 25 is used for blocking light rays intersecting the preset path from the light path.

Optionally, the light barrier 25 includes a first light barrier 251, a second light barrier 252, and a third light barrier 253. The preset path 26 includes a first path, a second path and a third path, which are mutually communicated, and light rays belong to the first path from the light inlet 23 to the first reflection module 21, belong to the second path from the first reflection module 21 to the second reflection module 22, and belong to the third path from the second reflection module 22 to the light outlet 24. The light inlet 23 is located between the first light barrier 251 and the second light barrier 252, and the light outlet 24 is located between the third light barrier 253 and the first reflection module 21. The first light barrier 251 and the first reflection module 21 enclose to form a first path, the first reflection module 21, the second light barrier 252, the second reflection module 22 and the third light barrier 253 enclose to form a second path, and the second light barrier 252, the second reflection module 22 and the third light barrier 253 enclose to form a third path. The side of the second light barrier 252 facing away from the predetermined path 26 also blocks light and isolates light having an excessive angle from the first reverse direction x.

Alternatively, the light parallel to the first direction x is emitted from the light emitting mechanism 10 and enters the reflecting mechanism 20 from the light inlet 23, and the light is reflected after being irradiated on the first reflecting module 21 and is emitted in a direction away from the preset position s and the central axis y (the light is emitted in an upper right direction in the figure). Until the light irradiates the second reflecting module 22 and is reflected again, the light is emitted towards the direction of the preset position s (the light is emitted towards the lower left direction in the figure), and finally leaves the reflecting mechanism 20 from the light outlet 24 and forms a preset image at the preset position s. The light rays are reflected twice in the reflection mechanism 20 to form an approximately Z-shaped light path (refer to a broken line in the figure). The above description of the light direction in the drawings is only for better showing the light direction, but only the light direction at the position in the drawings is described, the light emitting mechanism 10 and the reflecting mechanism 20 are disposed around the central axis y, and the light directions at different positions are different, which will be understood with reference to the drawings.

Referring to fig. 7, fig. 7 shows a schematic structural diagram of a positioning system according to yet another example.

In some alternative embodiments, the positioning system may further include a fourth light barrier 30, where the fourth light barrier 30 is located on a side of the reflection mechanism 20 facing away from the light emitting mechanism 10, and the fourth light barrier 30 is configured to block light rays whose optical paths are not parallel to the central axis of the third path.

The positioning system provided in this embodiment blocks light through the light barrier 25 and the fourth light barrier 30, so as to avoid that the user can see the preset image at a position too close to or too far from the positioning system, thereby causing the failure of the positioning system.

In some alternative embodiments, the reflective mechanism 20 is made of at least one material of transparent PC (polycarbonate), ABS (acrylonitrile butadiene styrene), PMMA (polymethyl methacrylate), COC (cyclic olefin copolymer), or glass, and is molded by casting. The surfaces of the first reflecting module 21 and the second reflecting module 22 are plated with reflecting coatings to form reflecting surfaces, and the surfaces of the light barrier 25 are plated with light absorbing coatings to absorb light.

Alternatively, the light inlet 23 and the light outlet 24 may be made of a light-transmitting material, or may be a notch structure on the reflection mechanism 20.

In summary, the positioning system provided in this embodiment includes a light emitting mechanism 10 and a reflecting mechanism 20, where the reflecting mechanism 20 is located at a light emitting side of the light emitting mechanism 10, the reflecting mechanism 20 includes a first reflecting module 21 and a second reflecting module 22, the first reflecting module 21 is used for reflecting light emitted by the light emitting mechanism 10, and the second reflecting module 22 is used for reflecting light reflected by the first reflecting module 21, and the light emitted by the light emitting mechanism 10 is reflected by at least two reflecting modules in the reflecting mechanism 20 to form a preset image at a preset position s, so that a user can complete positioning of an eyeball and test equipment by himself without guidance of a professional or a third party, thereby completing a self-detection process more accurately.

Embodiments of the second aspect of the present application also provide an ophthalmic measuring device comprising a positioning system of any of the embodiments above and an ophthalmic measuring apparatus, including but not limited to an intraocular pressure measuring apparatus.

Optionally, the tonometric measurement apparatus comprises a probe (not shown) having an axis coincident with the central axis y, the probe being configured to reciprocate along the central axis y. When the user sees the preset image, the cornea of the user can be judged to be at the preset position s, then the probe moves along the first direction x and impacts the cornea of the user, and the intraocular pressure measuring device detects the intraocular pressure of the user by identifying the movement state of the probe.

Since the ophthalmic measuring device provided in the embodiment of the second aspect of the present application includes the positioning system of any one of the embodiments of the first aspect, the ophthalmic measuring device provided in the embodiment of the second aspect of the present application has the advantages of the positioning system of any one of the embodiments of the first aspect, which are not described herein.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.

Claims (13)

1. A positioning system, comprising:

a light emitting mechanism;

the reflection mechanism is located the light emitting side of light emitting mechanism, the reflection mechanism includes first reflection module and second reflection module, first reflection module is used for the reflection light that light emitting mechanism sent, the second reflection module is used for the reflection the light that first reflection module reflected, light emitting mechanism sent is through behind the reflection mechanism at predetermine the position and is formed the image of predetermineeing.

2. The positioning system of claim 1, wherein the reflection mechanism further comprises a central axis extending along a first direction, the first reflection module and the second reflection module are each disposed around the central axis, and the predetermined position is located on the central axis.

3. The positioning system of claim 2, wherein the first and second reflective modules are conical or concave reflective modules.

4. A positioning system according to claim 3, wherein the angle between the first reflecting module and the central axis is greater than 0 ° and less than or equal to 80 °.

5. The positioning system of claim 2 wherein the reflection mechanism further comprises:

the light inlet is positioned between the first reflecting module and the light emitting mechanism in the first direction;

the light outlet is positioned at one side of the second reflection module, which is away from the light emitting mechanism, in the first direction.

6. The positioning system of claim 5, wherein the shape of the light inlet and the light outlet in a cross section perpendicular to the central axis is the same as the predetermined image.

7. The positioning system of claim 5 wherein the reflection mechanism further comprises:

the light blocking plate, the first reflecting module and the second reflecting module enclose together to form a preset path, the light inlet and the light outlet are respectively positioned at two ends of the preset path, and the light blocking plate is used for blocking light rays of which the light paths are intersected with the preset path.

8. The positioning system of claim 2, wherein the pre-set image comprises one of a torus, an elliptical torus, and a polygonal torus.

9. The positioning system of claim 8, wherein the light emitting mechanism comprises:

a light source;

and the light equalizing plate is positioned between the light source and the reflecting mechanism in the first direction.

10. The positioning system of claim 9, wherein the light averaging plate is spaced from the reflective mechanism by a distance of 0-30mm.

11. The positioning system of claim 1, wherein the predetermined position is a distance of 10-30mm from the reflecting mechanism.

12. An ophthalmic measurement device comprising a positioning system according to any one of claims 1 to 11.

13. The ophthalmic measurement device of claim 12, wherein the reflection mechanism further comprises a central axis extending in a first direction; the ophthalmic measurement device further includes a probe configured to reciprocate along the central axis.

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