Rotational fundus aberration measuring device

Abstract

The application discloses a rotating fundus aberration measuring device, and relates to the technical field of optical instruments. The rotating fundus aberration measuring device has a first axis, a second axis and a third axis intersecting at a measuring center and being perpendicular to each other, and comprises a measuring assembly, a driving assembly and a fixation assembly. The measuring assembly is used for measuring fundus aberration. The driving assembly is used for driving the measuring assembly to rotate around the first axis and the second axis. The fixation assembly comprises a fixation lamp and a strip-shaped reflector. The strip-shaped reflector extends along the direction of the third axis and is arranged on the side of the measuring assembly facing the measuring center. The fixation lamp is used for emitting fixation light, and the fixation light is reflected on the strip-shaped reflector and then shot toward the measuring center. The fixation assembly is configured to rotate along with the measuring assembly when the measuring assembly rotates around the second axis, so that the measuring light path of the measuring assembly passes through the strip-shaped reflector. The technical scheme provided by the application can improve the measurement accuracy of the rotating fundus aberration measuring device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical instruments, in particular to a rotating fundus aberration measuring device. BACKGROUND

[0002] The rotating fundus aberration measuring device rotates the measuring assembly to collect the aberration information of the fundus of the human eye at different field angles of the human eye. Since the rotating fundus aberration measuring device directly rotates the entire measuring assembly, the aberration at each field angle can be measured by the measuring assembly with a single field, so compared with other measuring devices, such as devices that rotate the human eye to measure the aberration at different field angles, and devices that change the angle of the measuring light path incident on the human eye to measure the aberration at different field angles, the amount of correction required is small, and thus the measuring accuracy can be higher.

[0003] However, since the measuring assembly needs to be rotated, the size of the rotating fundus aberration measuring device is often large, as it needs to at least meet the movement space of the measuring assembly at the entire field of view to be measured. This makes it difficult to set up a fixation assembly for fixing the line of sight of the human eye. If a large mirror is used to reflect the outgoing light of the fixation light between the measuring assembly and the human eye, so that the collection light path of the measuring assembly at all field angles can pass through the mirror, the size of the mirror is huge, and needs to be tilted, so that the human eye is too far from the measuring assembly, and the measuring accuracy is reduced. If a small mirror is used to reflect the outgoing light of the fixation light between the measuring assembly and the human eye, the collection light path of the measuring assembly is not at all field angles can pass through the mirror, so when the collection light path of the measuring assembly is just at the edge of the mirror, the aberration jumps, which is difficult to correct, resulting in a decrease in measuring accuracy. If the fixation assembly is built-in in the rotating fundus aberration measuring device (note that the fixation assembly cannot rotate with the measuring assembly, because the human eye cannot rotate), the measuring assembly will block the fixation light during movement, resulting in poor fixation effect and reduced measuring accuracy. SUMMARY

[0004] The main purpose of the present application is to provide a rotating fundus aberration measuring device, which aims to improve the measuring accuracy of the rotating fundus aberration measuring device.

[0005] To achieve the above object, the rotation type ocular fundus aberration measuring device has a first axis, a second axis and a third axis intersecting at a measuring center and being orthogonal to each other, and comprises a measuring assembly, a driving assembly and a fixation assembly. The measuring assembly is arranged outside the measuring center and is used for measuring ocular fundus aberration. The driving assembly is used for driving the measuring assembly to rotate around the first axis and the second axis, and the driving range is on one side of the plane passing through the first axis and the third axis. The fixation assembly comprises a fixation lamp and a strip-shaped reflector, the strip-shaped reflector extends along the third axis and is arranged on the side of the measuring assembly facing the measuring center, and the fixation lamp is used for emitting fixation light, the fixation light is reflected on the strip-shaped reflector and then is emitted to the measuring center. The fixation assembly is configured to rotate with the measuring assembly when the measuring assembly rotates around the second axis, so that the measuring light path of the measuring assembly passes through the strip-shaped reflector.

[0006] In some embodiments, the projection of the entrance pupil of the measuring assembly on the strip-shaped reflector along the direction of the second axis is within the strip-shaped reflector.

[0007] In some embodiments, the driving assembly comprises a rotating drum, the measuring assembly is arranged in the rotating drum, and the fixation assembly is arranged on the rotating drum; the axis of the rotating drum coincides with the second axis, and is used for rotating around the second axis to drive the measuring assembly and the fixation assembly to rotate around the second axis.

[0008] In some embodiments, the driving assembly further comprises an arc-shaped track arranged in the rotating drum and fixedly connected with the rotating drum; the center of curvature of the arc-shaped track is at the measuring center; the measuring assembly is arranged on the arc-shaped track and is used for moving along the arc-shaped track to rotate around the first axis.

[0009] In some embodiments, the two ends of the strip-shaped reflector abut against the inner wall of the rotating drum; the fixation lamp is arranged on the inner wall of the rotating drum; and the light emitted by the fixation lamp directly enters the strip-shaped reflector.

[0010] In some embodiments, the included angle between the strip-shaped reflector and the second axis is 45°.

[0011] In some embodiments, the measuring assembly comprises a wavefront sensor and a laser; the laser is used for projecting illumination light to the measuring center, and the wavefront sensor is used for collecting aberration information of the measuring center; and the illumination light is spaced from the second axis in the direction of the first axis.

[0012] In some embodiments, the measurement assembly further includes a beam splitter; the laser is configured to reflect emitted light onto the beam splitter to direct it toward the measurement center; the wavefront sensor is configured to acquire the aberration information through the transmitted light from the beam splitter; and the transmittance of the beam splitter is greater than the reflectance of the beam splitter.

[0013] In some embodiments, the transmittance of the beam splitter is greater than or equal to 80%.

[0014] In some embodiments, the strip reflector is a dichroic mirror.

[0015] In the technical solution of this invention, the measurement center is the position to be set for the human eye under test. This allows aberration measurements to be performed at different field-of-view angles of the human eye when the driving component rotates around the first and second axes. When the measuring component rotates around the second axis, the fixation component also rotates, meaning the position of the strip mirror and the measuring component remains relatively constant. When the measuring component rotates around the first axis, it is essentially moving along the third axis. Since the strip mirror extends along the third axis, the measuring optical path of the measuring component can pass through the strip mirror continuously when the measuring component rotates along the first axis. Therefore, on the one hand, the measuring optical path can pass through the strip mirror throughout the entire movement of the measuring component, preventing aberration jumps at the mirror's edge; on the other hand, the strip mirror's shape minimizes its extension along the second axis, allowing the measurement center to be closer to the measuring component. This improves the measurement accuracy of the rotating fundus aberration measuring device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of one embodiment of the rotating fundus aberration measuring device provided by the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the first rotational state of an embodiment of a rotating fundus aberration measuring device;

[0019] Figure 3 for Figure 1 A schematic diagram of the second rotational state of an embodiment of a rotating fundus aberration measuring device;

[0020] Figure 4 As Figure 1 Figure 3 is a third rotational state schematic view of an embodiment of the rotating fundus aberration measuring device;

[0021] Figure 5 Figure 4 is a structure schematic view of another embodiment of the rotating fundus aberration measuring device provided by the present application.

[0022] Brief Description of the Drawings:

[0023] Figure 1 is a structure schematic view of an embodiment of the rotating fundus aberration measuring device 10 provided by the present application.

[0024] Figure 2 is a structure schematic view of the measuring assembly 11 of the rotating fundus aberration measuring device 10; Figure 2a is a structure schematic view of the wavefront sensor 111 of the measuring assembly 11; Figure 2b is a structure schematic view of the laser 112 of the measuring assembly 11; Figure 2c is a structure schematic view of the beam splitter 113 of the measuring assembly 11; Figure 2d is a structure schematic view of the mirror 114 of the measuring assembly 11; and Figure 2e is a structure schematic view of the lens group 115 of the measuring assembly 11.

[0025] Figure 3 is a third rotational state schematic view of an embodiment of the rotating fundus aberration measuring device;

[0026] Figure 4 is a structure schematic view of another embodiment of the rotating fundus aberration measuring device provided by the present application.

[0027] Figure 5 is a structure schematic view of the human eye 20 of the rotating fundus aberration measuring device 10.

[0028] Figure 6 is a structure schematic view of the first axis x of the rotating fundus aberration measuring device 10.

[0029] Figure 7 is a structure schematic view of the second axis y of the rotating fundus aberration measuring device 10.

[0030] Figure 8 is a structure schematic view of the third axis z of the rotating fundus aberration measuring device 10.

[0031] Figure 9 is a structure schematic view of the measuring center o of the rotating fundus aberration measuring device 10.

[0032] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0035] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0036] The present application provides a rotating fundus aberration measuring device.

[0037] Please refer to Figure 1 and Figure 2 The rotating fundus aberration measuring device 10 provided by the present application has a first axis x, a second axis y and a third axis z intersecting at a measurement center o, and the rotating fundus aberration measuring device 10 comprises a measurement assembly 11, a driving assembly 12 and a fixation assembly 13. The measurement assembly 11 is arranged outside the measurement center o and is used for measuring fundus aberration. The driving assembly 12 is used for driving the measurement assembly 11 to rotate around the first axis x and the second axis y, and the driving range is on one side of the plane passing through the first axis x and the third axis z. The fixation assembly 13 comprises a fixation lamp 131 and a strip-shaped reflector 132; the strip-shaped reflector 132 extends along the third axis z and is arranged on the side of the measurement assembly 11 facing the measurement center o; the fixation lamp 131 is used for emitting fixation light, and the fixation light is reflected on the strip-shaped reflector 132 and then shot to the measurement center o. The fixation assembly 13 is configured to rotate with the measurement assembly 11 when the measurement assembly 11 rotates around the second axis y, so that the measurement light path of the measurement assembly 11 passes through the strip-shaped reflector 132.

[0038] The measurement center o is the position of the eyeball of the measured person. More specifically, the measurement center o can be the position of the preset pupil. In the measurement process of the rotating fundus aberration measuring device 10, the human eye 20 can not rotate, so the preset position of the human eye 20 is often fixed.

[0039] The first axis x, the second axis y and the third axis z intersect at the measurement center o and are orthogonal to each other, so that when the measurement assembly 11 arranged outside the measurement center o rotates around one of the axes (i.e., rotates around one of the axes as an axis), the field of view angle relative to the human eye 20 can be changed; and when the measurement assembly 11 can rotate around two of the axes, the field of view angle relative to the human eye 20 can be changed in two different directions, thereby enabling the measurement assembly 11 to be at any field of view angle in the entire field of view of the human eye 20.

[0040] Therefore, when the driving assembly 12 drives the measurement assembly 11 to rotate around the first axis x and the second axis y, the measurement assembly 11 can perform aberration measurement at any field of view angle, and the measurement of the central aberration and the peripheral aberration of the fundus can be completed. The measurement data can be used to calculate ophthalmic data such as the refractive topography of the human eye 20.

[0041] The activity range of the measurement assembly 11, i.e., the driving range of the driving assembly 12, can not be completely free relative to the first axis x and the second axis y. That is, the driving range can be on one side of the plane determined by the first axis x and the third axis z, and the subject can be on the other side of the plane. For example, the subject can be on the other side of the plane determined by the first axis x and the third axis z, and the driving range of the driving assembly 12 can be on one side of the plane. Figure 1 In the embodiment shown, the measurement assembly 11 has a rotation freedom of 180° relative to the first axis x and the second axis y, i.e., the full-field aberration measurement can be completed. However, in fact, since the horizontal field of view angle range and the vertical field of view angle range of the human eye 20 are not 180° (the former is about 160°, and the latter is about 130°), the activity angle range of the measurement assembly 11 can be further reduced to the extent of adapting to the field of view angle range of the human eye 20.

[0042] For the rotational fundus aberration measurement device 10 of the embodiment of the present application, the position of the second axis y can be determined in the following two ways:

[0043] The pre-set visual axis of the human eye 20 is the second axis y. The direction of the visual axis can be determined directly by placing the subject in the measurement position, or can be determined by the fixation direction of the fixation assembly 13. Because the fixation direction of the fixation assembly 13 is the direction in which the fixation assembly 13 guides the gaze of the human eye 20, the fixation direction is the direction of the visual axis.

[0044] The rotationally symmetric axis of the activity range of the measurement assembly 11 is the second axis y. The measurement assembly 11 will sweep through a certain range during the entire measurement period, and the range has a rotationally symmetric axis, which is the second axis y. As will be mentioned below, in some embodiments, the rotational fundus aberration measurement device 10 has an arc-shaped track 122, and the rotationally symmetric axis of the arc-shaped track 122 can also be the second axis y. Please refer to Figure 1 , in Figure 1In the shown embodiment, the arc-shaped track 122 coincides with itself after rotating 180° around the y-axis, so the second axis y is the rotation symmetry axis of the arc-shaped track 122.

[0045] The first axis x and the third axis z are actually rotated around the second axis y during the measurement. However, the first axis x and the third axis z are orthogonal to each other during the rotation. The plane passing through the first axis x and the third axis z is a plane passing through the measurement center o and perpendicular to the second axis y.

[0046] For the rotation of the first axis x and the third axis z, please refer to Figure 2 , Figure 3 and Figure 4 . In Figure 3 , the first axis x is exposed and the third axis z is hidden because it coincides with the second axis y; in Figure 3 , the third axis z is exposed and the first axis x is hidden because it coincides with the second axis y; in Figure 4 , the first axis x is exposed again and the third axis z is hidden again by the second axis y. Figure 2 to Figure 4 It can be considered that the measurement assembly 11 (not shown in the figure, please refer to the position of the measurement assembly 11 shown in Figure 1 ) is rotated 90° around the second axis y in turn.

[0047] For the embodiment of the present application, the rotation type ocular aberration measurement device 10, the extension direction of the bar-shaped reflector 132 can be directly taken as the direction of the third axis z (the axis passing through the measurement center o along this direction is the third axis z). Or, when the measurement assembly 11 does not rotate around the second axis y, the axis perpendicular to the axis of rotation of the measurement assembly 11 is taken as the third axis z. After the third axis z is determined, the axis passing through the measurement center o and perpendicular to the second axis y and the third axis z is taken as the first axis x. Or, when the measurement assembly 11 does not rotate around the second axis y, the axis of rotation of the measurement assembly 11 is taken as the first axis x.

[0048] The measurement assembly 11 is an assembly that can perform aberration measurement. It can be a camera that takes a photo of the human eye 20, so that the contrast of the photo can be used to calculate the aberration of the human eye 20. Please refer to Figure 5 . The measurement assembly 11 can also be an assembly including a wavefront sensor 111, which can directly measure the aberration of the human eye 20.

[0049] The driving assembly 12 drives the movement of the measurement assembly 11, so that the measurement assembly 11 can be located at different field angles of the human eye 20 for aberration measurement. The driving assembly 12 can be a mechanical arm, the end of which is connected to the measurement assembly 11 through a flange, so as to drive the measurement assembly 11 to rotate around the first axis x and the second axis y.

[0050] The driving component 12 drives the measuring component 11 to rotate around the first axis x and the second axis y. This rotation can be a circular arc trajectory or a non-circular arc trajectory, but the motion has angular momentum relative to the first axis x and the second axis y.

[0051] The fixation component 13 is the component that guides the human eye 20 to fixate. The fixation lamp 131 emits fixation light, which is reflected by the bar mirror 132 and directed towards the measurement center o, where it is received by the human eye 20. After the fixation light is reflected by the bar mirror 132, the resulting virtual image can be positioned on the second axis y. Thus, when the human eye 20 fixates on the virtual image, the visual axis direction is guided along the second axis y.

[0052] The fixation beam can be shaped by one or more lenses to adjust the distance between the virtual image formed by the fixation beam and the human eye 20. In some embodiments, the shaped fixation beam can also be projected toward the measurement center o in the form of a fogging signal to guide the human eye 20 to relax and fixate.

[0053] The strip-shaped reflector 132 is light-transmitting and is positioned on the side of the measuring component 11 facing the measuring center o, that is, between the human eye 20 and the measuring component 11. This allows the measuring optical path of the measuring component 11 to pass through the strip-shaped reflector 132 for aberration measurement. Simultaneously, the strip-shaped reflector 132 extends along the third axis z-direction. Please refer to [reference needed]. Figure 1 This allows the measuring component 11 to rotate about the first axis x (in...). Figure 1 In the embodiment shown, when moving along the arc track 122, the measurement optical path of the measuring component 11 can pass through the strip mirror 132. Since the strip mirror 132 rotates with the measuring component 11 around the second axis y, the measurement optical path can pass through the strip mirror 132 no matter how the measuring component 11 rotates. The measurement data of the measuring component 11 will not jump because the measurement optical path has to cross the edge of the mirror 114, thus improving the measurement accuracy of the rotating fundus aberration measuring device 10.

[0054] Because the strip-shaped reflector 132 is strip-shaped, extends along the third axis z direction, and rotates along the second axis y direction with the measuring component 11, it can be made to have an excessively large size in the second axis y direction, so that the subject's eyeball can be closer to the measuring component 11, avoiding interference from external stray light on the excessively far measuring optical path, and also improving the measurement accuracy of the rotating fundus aberration measuring device 10.

[0055] Please refer to Figure 1 and Figure 5 In some embodiments, the projection of the incident pupil of the measuring component 11 onto the strip mirror 132 along the direction of the second axis y is within the strip mirror 132.

[0056] In Figure 5 In the measurement light path (i.e. the incident light path of the wavefront sensor 111), it can be seen that the light with the fundus image information received by the wavefront sensor 111 passes through the strip mirror 132 completely without passing over the edge of the strip mirror 132, which is a manifestation that the projection of the incident pupil of the measurement assembly 11 in the direction of the second axis y on the strip mirror 132 is within the strip mirror 132. The projection of the incident pupil of the measurement assembly 11 in the mirror 114 is such that the wavefront of the light received by the measurement assembly 11 is not distorted by passing over the edge of the strip mirror 132, further improving the measurement accuracy of the rotating fundus aberration measurement device 10.

[0057] Referring to Figure 1 and Figure 5 In some embodiments, the driving assembly 12 includes a rotating drum 121; the measurement assembly 11 is arranged in the rotating drum 121, and the fixation assembly 13 is arranged on the rotating drum 121; the axis of the rotating drum 121 coincides with the second axis y, and the rotating drum 121 is configured to rotate about the second axis y to drive the measurement assembly 11 and the fixation assembly 13 to rotate about the second axis y.

[0058] Since the entire measurement assembly 11 needs to rotate, the total mass of the rotating device required is large. The measurement assembly 11 is arranged in the rotating drum 121, which can provide stronger support to ensure the stability of the movement of the measurement assembly 11 and avoid shaking, so that the measurement assembly 11 needs to be stabilized before measurement, improving the measurement efficiency. The fixation assembly 13 is also arranged on the rotating drum 121, so that the relative positional relationship between the fixation assembly 13 and the measurement assembly 11 is stable during rotation (i.e. when simply rotating about the second axis y, the relative position between the fixation assembly 13 and the measurement assembly 11 is as unchanged as possible), ensuring that the fixation direction is always stable and improving the measurement accuracy.

[0059] The drum wall and the drum bottom (the bottom wall facing away from the measurement center o) of the rotating drum 121 can be closed to reduce stray light interference with the measurement and improve the measurement accuracy.

[0060] Referring to Figure 1 and Figure 5 In some embodiments, the driving assembly 12 further includes an arc-shaped track 122, the arc-shaped track 122 being arranged in the rotating drum 121 and fixedly connected with the rotating drum 121; the center of curvature of the arc-shaped track 122 is at the measurement center o; the measurement assembly 11 is arranged on the arc-shaped track 122 and configured to move along the arc-shaped track 122 to rotate about the first axis x.

[0061] The arc-shaped track 122 is arranged in the rotary drum 121, so that the rotary drum 121 can provide support for the arc-shaped track 122, ensure the stability of the arc-shaped track 122, and thus improve the stability of the movement of the measurement assembly 11. The center of curvature of the arc-shaped track 122 is at the measurement center o, so that when the measurement assembly 11 moves along the arc-shaped track 122, the distance to the measurement center o remains unchanged; and since the arc-shaped track 122 rotates with the rotary drum 121, the distance to the measurement center o also remains unchanged when the measurement assembly 11 rotates around the first axis x. In this way, the measurement assembly 11 can be free of focusing, and the measurement efficiency is improved.

[0062] The center of curvature of the arc-shaped track 122 can also be on the second axis y and on the side of the measurement center o facing the measurement assembly 11. In this way, the farther the measurement assembly 11 deviates from the second axis y, the closer it is to the measurement center o. However, at this time, the light rays of the measurement light path pass through a greater thickness of the strip-shaped mirror 132, i.e., the optical path is longer, so that the closer distance of the measurement assembly 11 to the measurement center o can compensate for the increase in the optical path, and ensure that the free-focusing measurement assembly 11 can stably maintain a focused state (for the measurement assembly 11 using the wavefront sensor 111, it does not necessarily focus on the wavefront sensor 111, so at this time, the focused state can mean that the wavefront sensor can accurately reflect the position of the wavefront aberration of the human eye 20, for example, for the Hartmann-Shack wavefront sensor 111, i.e., the lens array and the pupil of the human eye 20 are in a conjugate position).

[0063] Please refer to Figure 1 and Figure 5 In some embodiments, the two ends of the strip-shaped mirror 132 abut against the inner wall of the rotary drum 121; the fixation light 131 is arranged on the inner wall of the rotary drum 121; and the light emitted by the fixation light 131 directly enters the strip-shaped mirror 132. In this way, on the one hand, the rotary drum 121 can be used to keep the positional relationship between the strip-shaped mirror 132 and the fixation light 131 stable, thereby improving the fixation effect; on the other hand, the rotary drum 121 can be used to simplify the elements in the fixation light path by using the size on the diameter of the rotary drum 121.

[0064] Please refer to Figure 5The visible bar-shaped reflector 132 is substantially in the middle position in the radial direction of the rotating drum 121, and the fixation lamp 131 is arranged on the inner wall of the rotating drum 121, so that the distance between the bar-shaped reflector 132 and the fixation lamp 131 is substantially equal to the radius of the rotating drum 121. This distance is usually far enough, and the virtual image formed by the light emitted by the fixation lamp 131 after being reflected by the bar-shaped reflector 132 is also substantially equal to the radius of the rotating drum 121 from the measurement center o (i.e. the human eye 20). This is sufficient to make the human eye 20 relaxed (when the human eye 20 gazes at a distant object, it is in a relaxed state), and the aberration measurement can be performed. Therefore, it is not necessary to arrange an optical element (such as a lens) between the fixation lamp 131 and the bar-shaped reflector 132 to make the virtual image of the fixation lamp 131 on the bar-shaped reflector 132 farther from the human eye 20. It is only necessary to make the light emitted by the fixation lamp 131 directly incident on the bar-shaped reflector 132, so that the virtual image of the fixation lamp 131 formed by the bar-shaped reflector 132 is far enough from the human eye 20.

[0065] Please refer to Figure 1 and Figure 5 In some embodiments, the angle between the bar-shaped reflector 132 and the second axis y is 45°. In Figure 5 , the second axis y is not shown, and the first axis x is shown for the sake of avoiding confusion with the optical path. However, since the second axis y is orthogonal to the first axis x, when the angle between the bar-shaped reflector 132 and the second axis y is 45°, the angle between the bar-shaped reflector 132 and the first axis x is also 45°. Therefore, in Figure 5 , the solid line representing the bar-shaped reflector 132 and the dashed line representing the first axis x form an angle of 45°.

[0066] If the angle between the bar-shaped reflector 132 and the second axis y is less than 45°, when the projection of the entrance pupil of the measurement assembly 11 on the bar-shaped reflector 132 in the direction of the first axis x is substantially within the bar-shaped reflector 132, the bar-shaped reflector 132 needs to have a larger width, which may occupy the space in the direction of the second axis y, so that the person to be measured needs to be farther from the measurement assembly 11. If the angle between the bar-shaped reflector 132 and the second axis y is greater than 45°, the fixation lamp 131 also needs to move in the direction of the first axis x towards the direction of the measurement center o, so as to ensure that the virtual image of the fixation lamp 131 on the bar-shaped reflector 132 is in the second axis y. Therefore, the space in the direction of the second axis y is also occupied, so that the person to be measured needs to be farther from the measurement assembly 11. Therefore, when the angle between the bar-shaped reflector 132 and the second axis y is 45°, the person to be measured can be closest to the measurement assembly 11, and the measurement accuracy can be improved.

[0067] Please refer to Figure 5In some embodiments, the measurement assembly 11 comprises a wavefront sensor 111 and a laser 112; the laser 112 is configured to project an illumination light towards the measurement center o, and the wavefront sensor 111 is configured to collect the aberration information of the measurement center o; the illumination light is spaced apart from the second axis y in the direction of the first axis x.

[0068] The illumination light is used to illuminate the fundus of the human eye 20, so that the wavefront sensor 111 can obtain the light reflected by the fundus. The laser 112 can emit an illumination light with good monochromaticity, for example, near-infrared light, so that the system can filter out stray light other than the light emitted by the laser 112 by utilizing the wavelength difference of the light, thereby improving the signal-to-noise ratio and ensuring the accuracy of the measurement.

[0069] In some embodiments, the measurement assembly 11 further comprises a mirror 114; the laser 112 is configured to project the illumination light towards the mirror 114; the mirror 114 is configured to reflect the illumination light towards the mirror 113. Figure 5 In the embodiment shown in the figure, the illumination light is reflected by the mirror 114, then reflected by the mirror 113, then transmitted by the strip mirror 132, and finally incident on the human eye 20. The fundus reflection light of the human eye 20 is first transmitted by the strip mirror 132, then transmitted by the mirror 113, and then transmitted by the two mirror groups 115, and finally incident on the wavefront sensor 111.

[0070] In some embodiments, the measurement assembly 11 further comprises a mirror 114; the laser 112 is configured to project the illumination light towards the mirror 114; the mirror 114 is configured to reflect the illumination light towards the mirror 113. Figure 5 In the embodiment shown in the figure, the second axis y is the optical axis of the wavefront sensor 111 and the mirror group 115. It can be seen that the illumination light is spaced apart from the second axis y in the direction of the first axis x. Since the second axis y is also the visual axis of the human eye 20 during the measurement, the illumination light deviates from the second axis y in the direction of the first axis x, so that the illumination light does not pass through the visual axis at any field angle, i.e. does not illuminate the top of the cornea. Therefore, the reflection light of the cornea does not enter the measurement assembly 11 at any time, which avoids the interference of the reflection light of the cornea with the measurement and ensures the accuracy of the measurement.

[0071] In some embodiments, the measurement assembly 11 further comprises a mirror 114; the laser 112 is configured to project the illumination light towards the mirror 114; the mirror 114 is configured to reflect the illumination light towards the mirror 113. Figure 5 In the embodiment shown in the figure, the two mirror groups 115 can be mirror groups 115 configured for the wavefront sensor 111. For example, the left mirror group 115 can be used for focusing, and the right mirror group 115 can be used for collimation, so that the wavefront sensor 111 and the pupil of the human eye 20 are in a conjugate position, and the collection of aberration is completed.

[0072] In some embodiments, the measurement assembly 11 further comprises a mirror 114; the laser 112 is configured to project the illumination light towards the mirror 114; the mirror 114 is configured to reflect the illumination light towards the mirror 113. Figure 5 In some embodiments, the measurement assembly 11 further comprises a mirror 113; the laser 112 is configured to project the illumination light towards the mirror 113; the wavefront sensor 111 is configured to collect the aberration information through the transmission light of the mirror 113; the transmission rate of the mirror 113 is greater than the reflection rate of the mirror 113.

[0073] In this way, when the light emitted by the laser 112 (i.e. the illumination light) is reflected on the beam splitter 113, it can be largely lost, avoiding the light of the laser 112 from damaging the human eye 20. At the same time, the reflected light of the human eye 20 can pass through the beam splitter 113 as much as possible to be received by the wavefront sensor 111, improving the accuracy of the measurement.

[0074] It is to be noted that Figure 5 In some embodiments, the transmittance of the beam splitter 113 is greater than or equal to 80%. The reflectance of the beam splitter 113 is (100% minus the transmittance of the beam splitter 113). It can be seen that when the transmittance is too small, the reflectance will be too large, which can cause the light emitted by the laser 112 to damage the human eye 20. When the transmittance of the beam splitter 113 is greater than or equal to 80%, the illumination light will not damage the human eye 20, and the beam splitter 113 has sufficient transmittance to ensure that sufficient laser light can be reflected from the fundus and pass through the beam splitter 113 for the wavefront sensor 111 to receive, ensuring the accuracy of the measurement.

[0075] It is to be noted that ​ In some embodiments, the strip-shaped reflector 132 is a dichroic mirror. In this way, the strip-shaped reflector 132 can have a high reflectance for the light emitted by the fixation light 131 and a high transmittance for the laser light reflected from the fundus. Because the light of the fixation light 131 is visible light, which can be set as green light. The light emitted by the laser 112 can be near-infrared light, and the wavelengths of the two are different. The dichroic mirror can have different transmittance and reflectance characteristics for light of different wavelengths, so as to ensure that the virtual image of the fixation light 131 on the strip-shaped reflector 132 has sufficient brightness, and at the same time, the measurement assembly 11 can also receive the laser light reflected by the human eye 20 with sufficient intensity.

[0076] The above merely describes exemplary embodiments of the present application, and is not intended to limit the protection scope of the present application. Any equivalent structural transformation made according to the technical concept of the present application, or direct / indirect application in other related technical fields, is included in the protection scope of the present application.

Claims

1. A rotating fundus aberration measuring device characterized by comprising: The rotation type ocular fundus aberration measuring device has a first axis, a second axis and a third axis intersecting at a measuring center, and comprises: a measuring assembly arranged outside the measuring center and used for measuring ocular fundus aberration; a driving assembly used for driving the measuring assembly to rotate around the first axis and the second axis and having a driving range on one side of a plane passing through the first axis and the third axis; the driving assembly comprises a rotating drum and an arc-shaped track; the measuring assembly is arranged in the rotating drum; the arc-shaped track is arranged in the rotating drum and fixedly connected with the rotating drum; a center of curvature of the arc-shaped track is at the measuring center; the measuring assembly is arranged on the arc-shaped track and used for moving along the arc-shaped track to rotate around the first axis; a fixation assembly comprising a fixation lamp and a strip-shaped reflector; the strip-shaped reflector extends along the third axis and is arranged on a side of the measuring assembly facing the measuring center; the fixation lamp is used for emitting fixation light, and the fixation light is reflected on the strip-shaped reflector and then emitted toward the measuring center; the fixation assembly is arranged on the rotating drum; the fixation assembly is configured to rotate with the measuring assembly when the measuring assembly rotates around the second axis, so that a measurement light path of the measuring assembly passes through the strip-shaped reflector; an axis of the rotating drum coincides with the second axis and is used for rotating around the second axis to drive the measuring assembly and the fixation assembly to rotate around the second axis.

2. Rotating fundus ocular aberrometry apparatus as claimed in claim 1, characterized in that A projection of an entrance pupil of the measuring assembly on the strip-shaped reflector in the direction of the second axis is in the strip-shaped reflector.

3. The rotating fundus ocular aberrometry device of claim 1, wherein, Two ends of the strip-shaped reflector abut against inner walls of the rotating drum; the fixation lamp is arranged on the inner walls of the rotating drum; light emitted by the fixation lamp is directly incident on the strip-shaped reflector.

4. The rotating fundus ocular aberrometry device of claim 1, wherein, An included angle between the strip-shaped reflector and the second axis is 45°.

5. The rotating fundus ocular aberrometry device of claim 1, wherein, The measuring assembly comprises a wavefront sensor and a laser; the laser is used for projecting illumination light toward the measuring center, and the wavefront sensor is used for collecting aberration information of the measuring center; the illumination light is spaced from the second axis in the direction of the first axis.

6. Rotating fundus ocular aberrometry apparatus as claimed in claim 5, characterized in that The measuring assembly further comprises a beam splitter; the laser is configured to reflect light emitted thereby on the beam splitter to be emitted toward the measuring center; the wavefront sensor is configured to collect the aberration information through transmitted light of the beam splitter; a transmittance of the beam splitter is greater than a reflectance of the beam splitter.

7. The rotating fundus ocular aberrometry device of claim 6, wherein, The transmittance of the beam splitter is greater than or equal to 80%.

8. The rotating fundus ocular aberrometry device of claim 1, wherein, The strip-shaped reflector is a dichroic mirror.

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