Optometry device and optometry system

Abstract

The invention provides an optometry device and an optometry system. The optometry device comprises an objective optometry module and a subjective optometry module; the objective optometry module comprises a beacon light source and a wavefront sensor; the subjective optometry module comprises a positioning light source and a first spectroscope, light emitted by the positioning light source can be reflected by the first spectroscope to form emergent light, and the emergent light is emitted out of the optometry device, so that a far sighting target display device outside the optometry device is positioned through the emergent light, and the far sighting target display device is used for measuring far vision of human eyes; the first spectroscope is arranged in a way that incident light entering the optometry device along the opposite direction of the emergent light can penetrate through the first spectroscope to enter the wavefront measuring light path and is overlapped with the optical axis of the wavefront measuring light path in the wavefront measuring light path. The optometry device and the optometry system provided by the invention can be closer to a real eye using environment during optometry, can be compatible with far-distance sighting mark display devices of various specifications, and facilitate more comprehensive optometry.

Description

Technical Field

[0001] The present application relates to the field of optometry technology, and in particular to an optometry device and an optometry system. Background Art

[0002] In the related art, some optometry devices are internally integrated with a distance sight mark display device to perform subjective optometry on the distance vision of the human eye.

[0003] When performing subjective eye test for far vision, the distance between the far sight mark display device and the human eye is usually required to be 3-5 meters. However, the far sight mark display device integrated in the eye test device is limited by the volume of the eye test device, and lens refraction is usually required to change the position of the image to meet the eye test distance requirement for far vision. In addition, no natural light usually enters the eye test device. Therefore, when the human eye observes the far sight mark display device inside the eye test device, there is a difference from the actual eye use environment. In addition, the far sight mark display device is set in the eye test device, which is not convenient for switching between different specifications of vision charts and eye test distances, making it difficult to perform a more comprehensive eye test. Summary of the invention

[0004] To at least partially solve the above problems, according to a first aspect of the present application, an embodiment of the present application provides an optometry device, which includes an objective optometry module and a subjective optometry module; the objective optometry module includes a beacon light source and a wavefront sensor. When objective optometry is performed on a human eye through the optometry device, the light emitted by the beacon light source can reach the fundus of the human eye through the beacon light path and the wavefront measurement light path, and after being reflected by the fundus of the human eye, reach the wavefront sensor through the wavefront measurement light path, so as to objectively measure the refractive error of the human eye; the subjective optometry module includes a positioning light source and a first beam splitter. The light emitted by the positioning light source can be reflected by the first beam splitter to form an outgoing light and emit out of the optometry device, so as to position a far-sighted sight mark display device outside the optometry device through the outgoing light. The far-sighted sight mark display device is used for measuring the far vision of the human eye, wherein the first beam splitter is configured such that: the incident light entering the optometry device in the opposite direction of the outgoing light can enter the wavefront measurement light path through the first beam splitter, and coincide with the optical axis of the wavefront measurement light path in the wavefront measurement light path.

[0005] In some embodiments, the subjective eye test module also includes a first reflector, which positions the light emitted by the light source, so that the light can be transmitted through the first beam splitter to reach the first reflector, and return to the first beam splitter after being reflected by the first reflector, and then enter the wavefront measurement optical path through the first beam splitter, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

[0006] In some embodiments, the optometry device also includes a near sight mark display device, which is used to measure the near vision of the human eye. The light emitted by the near sight mark display device can enter the wavefront measurement optical path and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

[0007] In some embodiments, the near sight mark display device is disposed on a first slider, and the first slider can be driven by a first lead screw to drive the near sight mark display device to move in a direction parallel to the emergent light.

[0008] In some embodiments, the optometry device further includes a second dichroic mirror, which is disposed on an emission path of the outgoing light, and the outgoing light can be reflected by the second dichroic mirror and then emitted from the optometry device; the position of the near sight mark display device is set to satisfy the requirement that the outgoing light can partially pass through the second dichroic mirror to reach the near sight mark display device.

[0009] In some embodiments, the optometry device also includes a second reflector, which is movably arranged in the optometry device, and the second reflector can move between a far vision detection position and a near vision detection position; when the second reflector is in the far vision detection position, the outgoing light can be reflected by the second reflector and then emitted from the optometry device; when the second reflector is in the far vision detection position, the outgoing light does not pass through the second reflector to reach the near vision mark display device.

[0010] In some embodiments, the second reflector is disposed on a second slider, and the second slider can be driven by a second lead screw to drive the second reflector to move.

[0011] In some embodiments, the wavefront measurement optical path includes a first relay telescope, a cylindrical mirror pair, a third beam splitter and a second relay telescope. The light emitted by the beacon light source reaches the third beam splitter via the beacon optical path and is reflected by the third beam splitter. Then, the light passes through the cylindrical mirror pair and the first relay telescope in sequence to reach the fundus of the human eye. The light reflected from the fundus of the human eye passes through the first relay telescope and the cylindrical mirror pair in sequence to reach the third beam splitter, and passes through the third beam splitter and the second relay telescope to reach the wavefront sensor.

[0012] In some embodiments, the beacon optical path includes a collimating objective lens and a fourth beam splitter. The light emitted by the beacon light source reaches the fourth beam splitter through the collimating objective lens, and after being reflected by the fourth beam splitter, reaches the third beam splitter and is reflected by the third beam splitter to coincide with the optical axis of the wavefront measurement optical path; the incident light entering the eye test device in the opposite direction of the outgoing light can pass through the first beam splitter and the fourth beam splitter in sequence to reach the third beam splitter and be reflected by the third beam splitter to coincide with the optical axis of the wavefront measurement optical path.

[0013] According to the second aspect of the present application, an embodiment of the present application also provides an optometry system, which includes an optometry device and a distance sight mark display device provided by any embodiment of the first aspect of the present application, wherein the light emitted by the positioning light source of the optometry device can be projected onto the distance sight mark display device.

[0014] The optometry device and optometry system provided in the embodiments of the present application are internally provided with a positioning light source, and the light emitted by the positioning light source from the optometry device is used as a positioning reference for the setting position of the distance sight mark display device, so that the distance sight mark display device can be set outside the optometry device, which can be closer to the actual eye environment during optometry, and can be compatible with various specifications of distance sight mark display devices, facilitating more comprehensive optometry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 is a schematic diagram of an optometry device provided in an embodiment of the present application; Figure 2 It is a schematic diagram of an optometry device provided in another embodiment of the present application.

[0017] The reference numerals are as follows:

[0018] 1. Beacon light source; 2. Collimating objective lens; 3. Fourth beam splitter; 4. Third beam splitter; 5. Cylindrical mirror pair; 6. First relay telescope; 7. Human eye; 8. Second relay telescope; 9. Wavefront sensor; 10. First beam splitter; 11. Second beam splitter; 12. Near sight mark display device; 13. Far sight mark display device; 14. Positioning light source; 15. First reflector.

[0019] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0020] The technical scheme of the preferred embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection claimed in the present application.

[0021] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] According to the first aspect of the present application, an embodiment of the present application provides an optometry device. Figure 1 As shown, the optometry device includes an objective optometry module and a subjective optometry module. The objective optometry module includes a beacon light source 1 and a wavefront sensor 9. When the optometry device is used to perform objective optometry on a human eye 7, the light emitted by the beacon light source 1 can reach the fundus of the human eye 7 via the beacon optical path and the wavefront measurement optical path, and after being reflected by the fundus of the human eye 7, reach the wavefront sensor 9 via the wavefront measurement optical path, so as to objectively measure the refractive error of the human eye 7. The subjective optometry module includes a positioning light source 14 and a first spectroscope 10. The light emitted by the positioning light source 14 can be reflected by the first spectroscope 10 to form an outgoing light and emit the optometry device, so as to locate the far sight mark display device 13 outside the optometry device through the outgoing light. The far sight mark display device 13 is used to measure the far vision of the human eye 7, wherein the first spectroscope 10 is configured as follows: the incident light entering the optometry device in the opposite direction of the outgoing light can pass through the first spectroscope 10 to enter the wavefront measurement optical path, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path. Exemplarily, the beacon light source 1 can be an infrared beacon light source; the positioning light source 14 can be a laser diode (LD) light source, which has a high straightness and is easy to position. It should be noted that the far vision in this application refers to the ability of the human eye 7 to see far away, usually the vision of observing a distance of 5 meters or 3 meters.

[0023] The optometry device provided in the embodiment of the present application is internally provided with a positioning light source 14. The light emitted by the optometry device through the positioning light source 14 serves as a positioning reference for the setting position of the distance sight mark display device 13, so that the distance sight mark display device 13 can be set outside the optometry device, which can be closer to the actual eye environment during optometry, and is compatible with various specifications of distance sight mark display devices 13, facilitating more comprehensive optometry.

[0024] Specifically, when the distance sight mark display device 13 is positioned by the positioning light source 14, the up and down and left and right positions of the distance sight mark display device 13 can be centered on the light spot of the positioning light source 14, and the front and back positions of the distance sight mark display device 13 can be measured by a tape measure according to the optometry distance requirements.

[0025] In some embodiments, the subjective optometry module further includes a first reflector 15, and the light emitted by the positioning light source 14 can be transmitted through the first spectroscope 10 to reach the first reflector 15, and return to the first spectroscope 10 after being reflected by the first reflector 15, and then enter the wavefront measurement optical path through the first spectroscope 10, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path. In this embodiment, a first reflector is provided, and when assembling the optometry device, the posture of the first spectroscope 10 can be adjusted by the first reflector 15, so that the light projected by the distance sight mark display device 13 after being positioned by the positioning light source 14 can enter the wavefront measurement optical path through the first spectroscope 10, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

[0026] In some embodiments, the optometry device further includes a near sight mark display device 12, which is used to measure the near vision of the human eye 7. The light emitted by the near sight mark display device 12 can enter the wavefront measurement optical path and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path. In this embodiment, by integrating the near sight mark display device 12 in the optometry device, the near vision of the human eye 7 can be detected, which increases the functionality of the optometry device and makes the optometry process more convenient. It should be noted that the near vision in the present application refers to the ability of the human eye 7 to see close, usually the vision of observing a distance of about 30-40 cm.

[0027] In some embodiments, the near sight mark display device 12 is arranged on the first slider, and the first slider can be driven by the first lead screw to drive the near sight mark display device 12 to move in a direction parallel to the exit light. In this embodiment, the sliding of the near sight mark display device 12 is realized by the above structure, so that the near sight mark display device 12 can move in a direction parallel to the exit light, so as to be applied to near vision detection at different distances. Exemplarily, the initial position of the near sight mark display device 12 can be 30-40 cm away from the system exit pupil position, such as 30 cm, 33 cm, 36 cm, 40 cm, etc.

[0028] In some embodiments, the optometry device further includes a second beam splitter 11, which is arranged on the exit path of the exit light, and the exit light can be emitted from the optometry device after being reflected by the second beam splitter 11; the position of the near sight mark display device 12 satisfies: the exit light can partially pass through the second beam splitter 11 to reach the near sight mark display device 12. In this embodiment, the near sight mark display device 12 and the far sight mark display device 13 are switched by the second beam splitter 11. When the far sight mark display device 13 needs to be used, the near sight mark display device 12 can be turned off and the far sight mark display device 13 can be turned on. At this time, the human eye 7 can only see the light reflected by the far sight mark display device 13 via the second beam splitter 11; when the near sight mark display device 12 needs to be used, the far sight mark display device 13 can be turned off and the near sight mark display device 12 can be turned on. At this time, the human eye 7 can only see the light transmitted through the second beam splitter 11 by the near sight mark display device 12. In this embodiment, the switching between the near sight mark display device 12 and the far sight mark display device 13 is realized by the second beam splitter 11, which has a simple structure and low cost.

[0029] In some embodiments, the optometry device further comprises a second reflector, which is movably arranged in the optometry device, and the second reflector can move between a far vision detection position and a near vision detection position; when the second reflector is in the far vision detection position, the outgoing light can be reflected by the second reflector and then emitted from the optometry device; when the second reflector is in the far vision detection position, the outgoing light does not pass through the second reflector to reach the near sight mark display device 12. In this embodiment, the switching of the near sight mark display device 12 and the far sight mark display device 13 is realized by setting a movable second reflector, which can avoid the loss of light intensity generated by the second beam splitter 11, and the optometry accuracy is higher. Exemplarily, in some embodiments, the second reflector is arranged on the second slider, and the second slider can be driven by the second lead screw to drive the second reflector to move. Of course, in other embodiments, the movement of the second reflector can also be realized by a turntable, and in other embodiments, the second reflector can also be a foldable structure to realize the switching of the near sight mark display device 12 and the far sight mark display device 13.

[0030] In some embodiments, the wavefront measurement optical path includes a first relay telescope 6, a cylindrical mirror pair 5, a third beam splitter 4, and a second relay telescope 8. The light emitted by the beacon light source 1 reaches the third beam splitter 4 through the beacon optical path, and is reflected by the third beam splitter 4, and then passes through the cylindrical mirror pair 5 and the first relay telescope 6 in sequence to reach the fundus of the human eye 7. The light reflected by the fundus of the human eye 7 passes through the first relay telescope 6 and the cylindrical mirror pair 5 in sequence to reach the third beam splitter 4, and passes through the third beam splitter 4 and the second relay telescope 8 to reach the wavefront sensor 9. In this embodiment, the defocus of the human eye 7 can be compensated by adjusting the interval between the two lenses in the first relay telescope 6, and the cylindrical mirror pair 5 can compensate for the astigmatism of the human eye 7.

[0031] In some embodiments, the beacon optical path includes a collimating objective lens 2 and a fourth beam splitter 3. The light emitted by the beacon light source 1 reaches the fourth beam splitter 3 through the collimating objective lens 2, and after being reflected by the fourth beam splitter 3, reaches the third beam splitter 4 and is reflected by the third beam splitter 4 to coincide with the optical axis of the wavefront measurement optical path; the incident light entering the eye test device in the opposite direction of the outgoing light can sequentially pass through the first beam splitter 10 and the fourth beam splitter 3 to reach the third beam splitter 4 and be reflected by the third beam splitter 4 to coincide with the optical axis of the wavefront measurement optical path.

[0032] like Figure 2 As shown, in some embodiments, the number of the optometry devices can be two, and the two optometry devices form a binocular optometry device to facilitate binocular (left eye and right eye) optometry. Preferably, the two optometry devices in the binocular optometry device can be arranged in mirror symmetry.

[0033] When conducting objective eye examination, the beacon light source 1 can be turned on, and the light emitted by the beacon light source 1 is collimated by the collimating objective lens 2, and then reflected by the fourth beam splitter 3 and the third beam splitter 4, and enters the human eye 7 through the cylindrical mirror pair 5 and the first relay telescope 6. The light reflected by the fundus of the human eye 7 passes through the first relay telescope 6, the cylindrical mirror pair 5, the third beam splitter 4 and the second relay telescope 8 to enter the wavefront sensor 9, so as to objectively measure the refractive error of the human eye 7.

[0034] The working process of the optometry device provided in some embodiments of the present application is as follows:

[0035] 1. Turn on the positioning light source 14, and determine the installation position (up and down and left and right) of the distance sight mark display device 13 according to the light spot of the positioning light source 14 after passing through the first beam splitter 10 and the second beam splitter 11. The front and rear positions of the distance sight mark display device 13 are determined by measuring with a measuring tool such as a tape measure;

[0036] 2. Turn on the beacon light source 1. The light emitted by the beacon light source 1 is collimated by the collimating lens 2, reflected by the fourth beam splitter 3 and the third beam splitter 4, and enters the human eye 7 after passing through the cylindrical mirror pair 5 and the first relay telescope 6;

[0037] 3. The light reflected from the fundus of the human eye 7 enters the wavefront sensor 9 through the first relay telescope 6, the cylindrical mirror pair 5, the third beam splitter 4 and the second relay telescope 8, and objectively measures the refractive error of the human eye 7;

[0038] 4. According to the measured refractive error of the human eye 7, the components in the large dashed frame are moved to compensate for the defocus of the human eye 7; the single cylindrical mirrors in the cylindrical mirror pair 5 are rotated around the optical axis to compensate for the astigmatism of the human eye 7;

[0039] 5. After the refractive error compensation of the human eye 7 is completed, the far sight mark display device 13 or the near sight mark display device 12 displays a specific type of sight mark according to the scene requirements. Taking the use of the far sight mark display device 13 for optometry as an example, the human eye 7 observes the specific sight mark displayed on the far sight mark display device 13 through the first relay telescope 6, the cylindrical mirror pair 5, the third beam splitter 4, the fourth beam splitter 3, the first beam splitter 10 and the second beam splitter 11 and makes a judgment; the defocus size is fine-tuned according to the subjective visual experience, and the relative angle of the cylindrical mirror pair 5 is rotated to fine-tune the size and axis of the synthetic astigmatism until the subjective best corrected visual quality is obtained, and the monocular subjective optometry is completed.

[0040] According to the second aspect of the present application, an embodiment of the present application also provides an optometry system, which includes an optometry device and a distance sight mark display device provided by any embodiment of the first aspect of the present application, wherein the light emitted by the positioning light source of the optometry device can be projected onto the distance sight mark display device.

[0041] Based on the above-mentioned embodiments of the present application, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0042] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are only for illustration and not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An optometry device, characterized in that: include: Objective optometry module and subjective optometry module; The objective optometry module includes a beacon light source and a wavefront sensor. When the optometry device is used to perform objective optometry on human eyes, the light emitted by the beacon light source can reach the fundus of the human eye through the beacon light path and the wavefront measurement light path, and after being reflected by the fundus of the human eye, reach the wavefront sensor through the wavefront measurement light path, so as to objectively measure the refractive error of the human eye. The subjective optometry module includes a positioning light source and a first dichroic mirror, wherein the light emitted by the positioning light source can be reflected by the first dichroic mirror to form an outgoing light and emitted from the optometry device, so as to position a far-sighted sight mark display device outside the optometry device through the outgoing light, and the far-sighted sight mark display device is used for measuring the far vision of the human eye, wherein the first dichroic mirror is configured such that the incident light entering the optometry device in the opposite direction of the outgoing light can enter the wavefront measurement optical path through the first dichroic mirror, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

2. The optometry device according to claim 1, characterized in that: The subjective eye test module also includes a first reflector. The light emitted by the positioning light source can be transmitted through the first beam splitter to reach the first reflector, and return to the first beam splitter after being reflected by the first reflector, and then enter the wavefront measurement optical path through the first beam splitter, and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

3. The optometry device according to claim 1, characterized in that: It also includes a near sight mark display device, which is used to measure the near vision of the human eye. The light emitted by the near sight mark display device can enter the wavefront measurement optical path and coincide with the optical axis of the wavefront measurement optical path in the wavefront measurement optical path.

4. The optometry device according to claim 3, characterized in that: The near sight mark display device is arranged on a first slider, and the first slider can be driven by a first lead screw to drive the near sight mark display device to move along a direction parallel to the emergent light.

5. The optometry device according to claim 3, characterized in that: It also includes a second beam splitter, which is arranged on the emission path of the emitted light, and the emitted light can be emitted from the optometry device after being reflected by the second beam splitter; the position where the near sight mark display device is arranged satisfies: the emitted light can partially pass through the second beam splitter to reach the near sight mark display device.

6. The optometry device according to claim 3, characterized in that: Also includes a second reflector, the second reflector is movably arranged in the optometry device, and the second reflector can be moved between a distance vision detection position and a near vision detection position; When the second reflector is in the distance vision detection position, the outgoing light can be reflected by the second reflector and then emitted out of the optometry device; When the second reflector is in the distance vision detection position, the emergent light reaches the near vision mark display device without passing through the second reflector.

7. The optometry device according to claim 5, characterized in that: The second reflector is arranged on a second slider, and the second slider can be driven by a second lead screw to drive the second reflector to move.

8. The optometry device according to claim 1, characterized in that: The wavefront measurement optical path includes a first relay telescope, a cylindrical mirror pair, a third beam splitter and a second relay telescope. The light emitted by the beacon light source reaches the third beam splitter via the beacon optical path, is reflected by the third beam splitter, and then passes through the cylindrical mirror pair and the first relay telescope in sequence to reach the fundus of the human eye. The light reflected by the fundus of the human eye passes through the first relay telescope and the cylindrical mirror pair in sequence to reach the third beam splitter, and passes through the third beam splitter and the second relay telescope to reach the wavefront sensor.

9. The optometry device according to claim 8, characterized in that: The beacon optical path includes a collimating objective lens and a fourth beam splitter. The light emitted by the beacon light source reaches the fourth beam splitter through the collimating objective lens, and after being reflected by the fourth beam splitter, reaches the third beam splitter and is reflected by the third beam splitter until it coincides with the optical axis of the wavefront measurement optical path. The incident light incident on the optometry device in the opposite direction of the outgoing light can sequentially pass through the first beam splitter and the fourth beam splitter to reach the third beam splitter and be reflected by the third beam splitter to coincide with the optical axis of the wavefront measurement optical path.

10. An optometry system, characterized in that: It comprises an optometry device and a distance sight mark display device as described in any one of claims 1 to 9, wherein the light emitted by the positioning light source of the optometry device can be projected onto the distance sight mark display device.

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