Optometry device and optometry system

Abstract

The utility model 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 utility model can be closer to a real eye using environment during optometry, can be compatible with far-distance sighting mark display devices with various specifications, and are convenient to carry out more comprehensive optometry.

Description

Technical Field

[0001] This utility model relates to the field of optometry technology, specifically to optometry devices and optometry systems. Background Technology

[0002] In related technologies, some optometry devices integrate a distance visual target display device to perform subjective refraction of the human eye's distance vision.

[0003] When performing subjective refraction of distance vision, the distance target display device usually needs to be 3-5 meters away from the human eye. However, the distance target display device integrated into the refraction device is limited by the size of the refraction device, and usually requires lens refraction to change the position of the image to meet the refraction distance requirements of distance vision. Moreover, no natural light usually enters the refraction device. Therefore, when the human eye observes the distance target display device inside the refraction device, there is a difference from the actual visual environment. In addition, the distance target display device is located inside the refraction device, which makes it inconvenient to switch between different sizes of visual acuity charts and refraction distances, making it difficult to conduct a more comprehensive refraction. Summary of the Invention

[0004] To at least partially solve the above problems, according to a first aspect of the present invention, an embodiment of the present invention 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 the optometry device performs objective optometry on a human eye, 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, it reaches the wavefront sensor through the wavefront measurement light path to objectively measure the refractive error of the human eye; The subjective refraction 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 exit the refraction device. The outgoing light is used to locate the distance target display device outside the refraction device. The distance target display device is used to measure the distance visual acuity of the human eye. The first beam splitter is configured such that incident light entering the refraction device in the opposite direction of the outgoing light can pass through the first beam splitter and enter the wavefront measurement optical path, and coincide with the optical axis of the wavefront measurement optical path.

[0005] In some embodiments, the subjective optometry module further includes a first reflector, which positions the light emitted by the light source to be transmitted through the first beam splitter to the first reflector, and then reflected back to the first beam splitter after being reflected by the first reflector. The light then enters the wavefront measurement optical path after being reflected by the first beam splitter, and coincides with the optical axis of the wavefront measurement optical path.

[0006] In some embodiments, the optometry device further includes a near optotype display device for measuring near visual acuity of the human eye. The light emitted by the near optotype display device can enter the wavefront measurement optical path and coincide with the optical axis of the wavefront measurement optical path.

[0007] In some embodiments, the near target display device is disposed on a first slider, which can be driven by a first lead screw to move the near target display device in a direction parallel to the emitted light.

[0008] In some embodiments, the optometry device further includes a second beam splitter, which is disposed in the exit path of the emitted light, and the emitted light can be reflected by the second beam splitter and exit the optometry device; the position of the near target display device satisfies that the emitted light can partially pass through the second beam splitter to reach the near target display device.

[0009] In some embodiments, the optometry device further includes a second reflector, which is movably disposed in the optometry device and is movable between a distance vision testing position and a near vision testing position. When the second reflector is in the distance vision testing position, the emitted 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 testing position, the emitted light does not pass through the second reflector to reach the near vision target display device.

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

[0011] In some embodiments, the wavefront measurement optical path includes a first relay telescope, a pair of cylindrical mirrors, a third beam splitter, and a second relay telescope. Light emitted from the beacon light source reaches the third beam splitter via the beacon optical path, is reflected by the third beam splitter, and then passes sequentially through the pair of cylindrical mirrors and the first relay telescope to reach the fundus of the human eye. The light reflected from the fundus of the human eye passes sequentially through the first relay telescope and the pair of cylindrical mirrors to reach the third beam splitter, and then 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 from the beacon light source passes through the collimating objective lens to the fourth beam splitter, is reflected by the fourth beam splitter, and then reaches the third beam splitter, where it is reflected to coincide with the optical axis of the wavefront measurement optical path. The incident light that enters the optometry 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, where it is reflected to coincide with the optical axis of the wavefront measurement optical path.

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

[0014] The optometry device and optometry system provided in the embodiments of this utility model are equipped with a positioning light source. The light emitted from the optometry device by the positioning light source serves as a positioning reference for the placement of the distance visual target display device. This allows the distance visual target display device to be placed outside the optometry device, enabling it to more closely approximate the real visual environment during optometry. Furthermore, it is compatible with various specifications of distance visual target display devices, facilitating a more comprehensive optometry. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the optometry device provided in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of an optometry device provided in another embodiment of the present invention.

[0018] The attached figures are labeled as follows:

[0019] 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-field target display device; 13. Far-field target display device; 14. Positioning light source; 15. First reflecting mirror.

[0020] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

[0022] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" 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.

[0023] According to a first aspect of the present invention, an embodiment of the present invention provides an optometric device. For example... 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 performs objective optometry on the human eye 7, the light emitted by the beacon light source 1 can reach the fundus of the human eye 7 through the beacon optical path and the wavefront measurement optical path, and after being reflected by the fundus of the human eye 7, it reaches the wavefront sensor 9 through the wavefront measurement optical path to objectively measure the refractive error of the human eye 7. The subjective refraction module includes a positioning light source 14 and a first beam splitter 10. The light emitted by the positioning light source 14 is reflected by the first beam splitter 10 to form an outgoing light that exits the refraction device. This outgoing light is used to locate the distance target display device 13 outside the refraction device. The distance target display device 13 is used to measure the distance visual acuity of the human eye 7. The first beam splitter 10 is configured such that incident light entering the refraction device in the opposite direction to the outgoing light can pass through the first beam splitter 10 and enter the wavefront measurement optical path, coinciding with the optical axis of the wavefront measurement optical path. For example, 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. Laser diode light sources have high straightness, which facilitates positioning. It should be noted that the distance visual acuity in this invention refers to the ability of the human eye 7 to see distant objects, typically the visual acuity at a distance of 5 meters or 3 meters.

[0024] The optometry device provided in the embodiment of this utility model has a positioning light source 14 inside. The light emitted by the positioning light source 14 from the optometry device serves as a positioning reference for the placement of the distance visual target display device 13. This allows the distance visual target display device 13 to be placed outside the optometry device, making the optometry process closer to the real eye environment. It is also compatible with various specifications of distance visual target display devices 13, facilitating a more comprehensive optometry.

[0025] Specifically, when positioning the distance target display device 13 using the positioning light source 14, the up-down and left-right positions of the distance target display device 13 can be centered on the light spot of the positioning light source 14, and the front-back position of the distance target display device 13 can be determined by measuring tape according to the refraction distance requirements.

[0026] In some embodiments, the subjective optometry module further includes a first reflecting mirror 15. Light emitted from the positioning light source 14 can be transmitted through the first beam splitter 10 to the first reflecting mirror 15, reflected by the first reflecting mirror 15, and then returned to the first beam splitter 10. It is then reflected by the first beam splitter 10 and enters the wavefront measurement optical path, where it coincides with the optical axis of the wavefront measurement optical path. In this embodiment, the first reflecting mirror 15 is provided so that during the assembly of the optometry device, the orientation of the first beam splitter 10 can be adjusted so that the light projected by the distance target display device 13 after being positioned by the positioning light source 14 can pass through the first beam splitter 10 and enter the wavefront measurement optical path, coinciding with the optical axis of the wavefront measurement optical path.

[0027] In some embodiments, the optometry device further includes a near-field target display device 12, which is used to measure the near visual acuity of the human eye 7. The light emitted by the near-field target display device 12 can enter the wavefront measurement optical path and coincide with the optical axis of the wavefront measurement optical path. In this embodiment, by integrating the near-field target display device 12 into the optometry device, the near visual acuity of the human eye 7 can be detected, increasing the functionality of the optometry device and making the optometry process more convenient. It should be noted that the near visual acuity in this invention refers to the ability of the human eye 7 to see near objects, typically the visual acuity at a distance of about 30-40cm.

[0028] In some embodiments, the near vision target display device 12 is disposed on a first slider, which is driven by a first lead screw to move the near vision target display device 12 in a direction parallel to the emitted light. In this embodiment, the above structure enables the near vision target display device 12 to slide, allowing it to move in a direction parallel to the emitted light for near vision detection at different distances. For example, the initial position of the near vision target display device 12 can be 30-40 cm from the system exit pupil, such as 30 cm, 33 cm, 36 cm, 40 cm, etc.

[0029] In some embodiments, the optometry device further includes a second beam splitter 11, which is disposed in the exit path of the emitted light, allowing the emitted light to exit the optometry device after being reflected by the second beam splitter 11. The near target display device 12 is positioned such that the emitted light can partially pass through the second beam splitter 11 to reach the near target display device 12. In this embodiment, the second beam splitter 11 enables the switching between the near target display device 12 and the far target display device 13. When the far target display device 13 is needed, the near target display device 12 can be turned off and the far target display device 13 can be turned on. At this time, the human eye 7 can only see the light reflected by the second beam splitter 11 from the far target display device 13. When the near target display device 12 is needed, the far target display device 13 can be turned off and the near target 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 from the near target display device 12. In this embodiment, the switching between the near-field target display device 12 and the far-field target display device 13 is achieved through the second beam splitter 11, which has a simple structure and low cost.

[0030] In some embodiments, the optometry device further includes a second reflector, which is movably disposed within the optometry device and can move between a distance vision testing position and a near vision testing position. When the second reflector is in the distance vision testing position, the emitted light can be reflected by the second reflector and exit the optometry device; when the second reflector is in the distance vision testing position, the emitted light does not pass through the second reflector to reach the near vision target display device 12. In this embodiment, by setting a movable second reflector to achieve the switching between the near vision target display device 12 and the distance vision target display device 13, the light intensity loss caused by the second beam splitter 11 can be avoided, resulting in higher optometry accuracy. Exemplarily, in some embodiments, the second reflector is disposed on a second slider, which can be driven by a second lead screw to move the second reflector. Of course, in other embodiments, the movement of the second reflector can also be achieved by a turntable. In other embodiments, the second reflector can also be a foldable structure to achieve the switching between the near vision target display device 12 and the distance vision target display device 13.

[0031] In some embodiments, the wavefront measurement optical path includes a first relay telescope 6, a pair of cylindrical lenses 5, a third beam splitter 4, and a second relay telescope 8. Light emitted from the beacon light source 1 travels through the beacon optical path to the third beam splitter 4, is reflected by the third beam splitter 4, and then passes sequentially through the pair of cylindrical lenses 5 and the first relay telescope 6 to reach the fundus of the human eye 7. The light reflected from the fundus of the human eye 7 then passes sequentially through the first relay telescope 6 and the pair of cylindrical lenses 5 to reach the third beam splitter 4, and then through the third beam splitter 4, through 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 spacing between the two lenses in the first relay telescope 6, and the astigmatism of the human eye 7 can be compensated by the pair of cylindrical lenses 5.

[0032] In some embodiments, the beacon optical path includes a collimating objective lens 2 and a fourth beam splitter 3. The light emitted from the beacon light source 1 passes through the collimating objective lens 2 to the fourth beam splitter 3, and after being reflected by the fourth beam splitter 3, it 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 that enters the optometry device in the opposite direction of the outgoing light can pass through the first beam splitter 10 and the fourth beam splitter 3 in sequence 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.

[0033] like Figure 2 As shown, in some embodiments, there can be two refraction devices, which together form a binocular refraction device to facilitate binocular (left and right eye) refraction. Preferably, the two refraction devices in the binocular refraction device can be arranged in a mirror-symmetrical configuration.

[0034] During objective refraction, beacon light source 1 can be turned on. The light emitted by beacon light source 1 is collimated by collimating objective lens 2, and then reflected by fourth beam splitter 3 and third beam splitter 4. It passes through cylindrical mirror pair 5 and first relay telescope 6 and enters human eye 7. The light reflected from the fundus of human eye 7 passes through first relay telescope 6, cylindrical mirror pair 5, third beam splitter 4 and second relay telescope 8 and enters wavefront sensor 9 to objectively measure the refractive error of human eye 7.

[0035] The working process of the optometry device provided in some embodiments of this utility model is as follows:

[0036] 1. Turn on the positioning light source 14. Determine the installation position (up and down and left and right) of the remote visual target display device 13 based on the light spot after the positioning light source 14 passes through the first beam splitter 10 and the second beam splitter 11. The front and back position of the remote visual target display device 13 is determined by measuring tools such as a tape measure.

[0037] 2. Turn on the beacon light source 1. The light emitted by the beacon light source 1 is collimated by the collimating objective 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.

[0038] 3. The light reflected from 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 and enters the wavefront sensor 9 to objectively measure the refractive error of the human eye 7.

[0039] 4. Based on the measured refractive error of the human eye 7, the defocus of the human eye 7 is compensated by moving the components within the large dashed frame; the astigmatism of the human eye 7 is compensated by rotating the single cylindrical mirror in the cylindrical mirror pair 5 around the optical axis.

[0040] 5. After the refractive error compensation of the human eye 7 is completed, a specific type of optotype is displayed on the distance optotype display device 13 or the near optotype display device 12 according to the needs of the scene. Taking the use of the distance optotype display device 13 for refraction as an example, the human eye 7 observes and judges the specific optotype displayed on the distance optotype 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; the defocus size is finely adjusted according to the subjective visual perception, and the relative angle of the cylindrical mirror pair 5 is rotated to finely adjust the synthesized astigmatism size and axis until the subjective best corrected visual quality is obtained, thus completing the monocular subjective refraction.

[0041] According to a second aspect of the present invention, an embodiment of the present invention also provides an optometry system, which includes an optometry device and a distance target display device provided in any embodiment of the first aspect of the present invention, wherein light emitted from the positioning light source of the optometry device can be projected onto the distance target display device.

[0042] Based on the above embodiments of the present invention, in the absence of explicit denial or conflict, the technical features of one embodiment can be advantageously combined with one or more other embodiments.

[0043] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An optometric device, characterized in that, include: Objective refraction module and subjective refraction module; The objective refraction module includes a beacon light source and a wavefront sensor. When the refraction device performs objective refraction on the human eye, the light emitted by the beacon light source can reach the fundus of the human eye through the beacon optical path and the wavefront measurement optical path, and after being reflected by the fundus of the human eye, it reaches the wavefront sensor through the wavefront measurement optical path to objectively measure the refractive error of the human eye. The subjective refraction 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 outgoing light and exit the refraction device. The outgoing light is used to locate a distance target display device outside the refraction device. The distance target display device is used to measure the distance visual acuity of the human eye. The first beam splitter is configured such that incident light entering the refraction device in the opposite direction of the outgoing light can pass through the first beam splitter and enter the wavefront measurement optical path, and coincide with the optical axis of the wavefront measurement optical path.

2. The optometry device according to claim 1, characterized in that, The subjective optometry module also includes a first reflector. The light emitted by the positioning light source can be transmitted through the first beam splitter to the first reflector, and after being reflected by the first reflector, it returns to the first beam splitter. Then, it is reflected by the first beam splitter into the wavefront measurement optical path, and coincides with the optical axis of the wavefront measurement optical path.

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

4. The optometry device according to claim 3, characterized in that, The near-field target display device is mounted on a first slider, which can be driven by a first lead screw to move the near-field target display device in a direction parallel to the emitted light.

5. The optometry device according to claim 3, characterized in that, It also includes a second beam splitter, which is disposed in the exit path of the emitted light, and the emitted light can be reflected by the second beam splitter and exit the optometry device; the position of the near target display device satisfies that the emitted light can partially pass through the second beam splitter to reach the near target display device.

6. The optometry device according to claim 3, characterized in that, It also includes a second reflector, which is movably disposed in the optometry device and is movable between a distance vision testing position and a near vision testing position; When the second reflector is in the distance vision detection position, the emitted 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 emitted light does not pass through the second reflector to reach the near vision target display device.

7. The optometry device according to claim 6, characterized in that, The second reflector is mounted on the second slider, which can be driven by the second lead screw to move the second reflector.

8. The optometry device according to claim 1, characterized in that, The wavefront measurement optical path includes a first relay telescope, a pair of cylindrical mirrors, a third beam splitter, and a second relay telescope. The light emitted from the beacon light source reaches the third beam splitter via the beacon optical path, is reflected by the third beam splitter, and then passes sequentially through the pair of cylindrical mirrors and the first relay telescope to reach the fundus of the human eye. The light reflected from the fundus of the human eye passes sequentially through the first relay telescope and the pair of cylindrical mirrors to reach the third beam splitter, and then passes through the third beam splitter, through the second relay telescope, and reaches 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 passes through the collimating objective lens to the fourth beam splitter. After being reflected by the fourth beam splitter, the light 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. Incident light that enters the optometry 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.

10. An optometry system, characterized in that, Includes an optometry device and a distance target display device as described in any one of claims 1-9, wherein light emitted from the positioning light source of the optometry device can be projected onto the distance target display device.

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