Full-view-field diopter-adjustable simulation eye and diopter measurement equipment calibration method

Abstract

The invention discloses a full-view-field diopter-adjustable simulation eye and a calibration method of diopter measurement equipment, and relates to the technical field of vision detection.The simulation eye comprises a diaphragm, a refraction adjusting lens set and a reticle with angle scales; the diaphragm simulates human eye pupils to receive incident light from the to-be-tested equipment; the refraction adjusting lens group transmits the incident light to the reticle; the reticle partially reflects the incident light, so that the reflected light returns to the refraction adjusting lens group along an incident light path; and the refraction adjusting lens group performs diopter adjustment on the reflected light, so that the reflected light after diopter adjustment continues to return to the to-be-tested equipment along the incident light path. According to the application, the incident light emitted from each angle by the light source of the to-be-tested equipment is received through the diaphragm, the diopter of the reflected light is adjusted by adopting the refraction adjusting lens group, and the light beam output at any angle and any diopter can be realized in combination with the angle information acquired from the reticle, so that the simulation of the full-view-field refraction state of human eyes is realized.

Description

Technical Field

[0001] The present application relates to the technical field of vision detection, and in particular to a simulated eye with adjustable diopter throughout the entire field of view and a calibration method for a diopter measurement device. Background Art

[0002] The simulated eye provides a standardized method for testing and calibrating optical equipment because it eliminates the influence of individual differences. For example, when testing a refractive measurement device, the refractive measurement device can be calibrated based on a simulated eye with adjustable diopter.

[0003] However, the existing simulated eyes on the market only focus on the refractive simulation in the axial position, that is, the refractive power of such simulated eyes is accurate when used axially, but the refractive power in the peripheral field of view is not taken into account. The actual human eye has not only central refraction but also peripheral refraction. Since there are almost no suitable simulated eyes for simulating the refractive state of the human eye's peripheral vision, it is difficult to meet the requirements of calibration, verification, and measurement accuracy evaluation of human eye peripheral vision refractive power measurement equipment. Summary of the invention

[0004] The main purpose of this application is to provide a simulated eye with adjustable diopter throughout the entire field of view and a calibration method for a diopter measurement device, aiming to solve the technical problem that the existing simulated eye does not take into account the simulation of the refractive state of the human eye's peripheral vision, and thus cannot meet the calibration, verification, and measurement accuracy assessment of the human eye's peripheral vision diopter measurement device.

[0005] To achieve the above-mentioned purpose, the present application proposes a simulated eye with adjustable diopter in the whole field of view, the simulated eye comprising: an aperture, a diopter adjustment lens group and a graticule with an angle scale;

[0006] The aperture is used to simulate the pupil of a human eye to receive incident light from the device under test;

[0007] The refractive adjustment lens group is used to transmit the incident light to the reticle;

[0008] The graticule is used to partially reflect the incident light so that the reflected light returns to the diopter adjustment lens group along the incident light path;

[0009] The diopter adjustment lens group is also used to adjust the diopter of the reflected light to obtain the reflected light after diopter adjustment, so that the reflected light after diopter adjustment continues to return to the device under test along the incident light path.

[0010] In one embodiment, the simulated eye further comprises: an imaging lens group and a CCD camera, wherein the imaging lens group enables the graticule and the photosensitive surface of the CCD camera to be in a conjugate state;

[0011] The graticule is further used to transmit the incident light, so as to propagate the transmitted light to the CCD camera through the imaging lens group;

[0012] The CCD camera is used to perform photosensitivity imaging based on the transmitted light to obtain a bright spot image reflecting the relative position of the incident light on the graticule, so as to determine the incident angle of the incident light corresponding to the aperture position according to the bright spot image.

[0013] In one embodiment, the simulated eye further comprises: a beam splitter and a surface light source, wherein the beam splitter and the surface light source are located between the imaging lens group and the CCD camera; a replaceable pinhole array plate is mounted on the graticule;

[0014] The beam splitter is used to reflect the emitted light of the surface light source so as to transmit the emitted light to the pinhole array plate through the imaging lens group;

[0015] The pinhole array plate is used to output the emitted light through the pinholes to obtain emitted light at different angles;

[0016] The CCD camera is further used to image the pinhole array plate through the imaging lens group to obtain a pinhole position image, so as to determine the exit angles of the exit lights at different angles corresponding to the aperture position according to the pinhole position image;

[0017] The refractive adjustment lens group is also used to adjust the diopter of the emergent light at different angles to obtain the emergent light at different angles after adjustment, so that the emergent light at different angles after adjustment is transmitted to the device under test through the aperture.

[0018] In one embodiment, the aperture is an adjustable aperture;

[0019] The aperture is also used to adjust the incident light from the external light source of the device under test to incident light of a preset diameter;

[0020] The aperture is also used to adjust the emergent light to emergent light of a preset diameter.

[0021] In one embodiment, the diopter adjustment lens group includes a plurality of coaxial lenses, and the diopter adjustment lens group and the aperture are designed as a telecentric optical path.

[0022] In one embodiment, the refraction adjustment lens group includes, in order of incidence of the incident light along the optical axis, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens.

[0023] In addition, to achieve the above purpose, the present application also proposes a calibration method for a diopter measurement device based on the above-mentioned simulated eye with adjustable diopter in the whole field of view, the method comprising:

[0024] When receiving incident light from the device under test, obtaining reflected light corresponding to the incident light;

[0025] Performing diopter adjustment on the reflected light to obtain diopter-adjusted reflected light;

[0026] The reflected light after the diopter adjustment is returned to the device under test along the incident light path, so that the device under test performs diopter detection based on the reflected light after the diopter adjustment to obtain the detected diopter, and compares the detected diopter value with the adjusted diopter corresponding to the reflected light after the diopter adjustment, and performs calibration according to the comparison result.

[0027] In one embodiment, the step of adjusting the diopter of the reflected light to obtain the reflected light after the diopter adjustment includes:

[0028] Determine the target diopter based on current testing needs;

[0029] By translating the graticule, the reflected light is adjusted to the target diopter, thereby obtaining the reflected light after diopter adjustment;

[0030] Alternatively, the reflected light is adjusted to the target diopter by translating some lenses in the diopter adjustment lens group to obtain the reflected light with adjusted diopter.

[0031] In one embodiment, the method further comprises:

[0032] Determine a target angle based on current detection requirements, and determine a current pinhole array plate according to the target angle;

[0033] Passing the emitted light generated by the surface light source through the current pinhole array plate to obtain the emitted light corresponding to the target angle, and determining it as the target detection light;

[0034] The target detection light is transmitted to the device under test through an aperture, so that the device under test performs diopter detection and angle detection based on the target detection light to obtain detection results, and performs calibration according to the detection results.

[0035] In one embodiment, the method further comprises:

[0036] When receiving incident light from a light source of the device to be tested, a bright spot image reflecting a relative position of the incident light on the graticule is obtained by a CCD camera;

[0037] The incident angle of the incident light is determined according to the bright spot image in combination with the scale information of the graticule, so that the device under test is calibrated according to the comparison result in combination with the incident angle.

[0038] The present application provides a simulated eye with adjustable diopter in the entire field of view, the simulated eye comprising an aperture, a diopter adjustment lens group and a graticule with an angle scale; the aperture simulates the pupil of a human eye to receive incident light from a device to be tested; the diopter adjustment lens group transmits the incident light to the graticule; the graticule reflects the incident light so that the reflected light returns to the diopter adjustment lens group along the incident light path; the diopter adjustment lens group performs diopter adjustment on the reflected light to obtain the reflected light after diopter adjustment, so that the reflected light after diopter adjustment continues to return to the device to be tested along the incident light path. The simulated eye of the present application receives incident light from different angles of the device under test through an aperture, and returns the corresponding reflected light along the incident light path to the device under test through a graticule. Since the present application can use a refractive adjustment lens group between the aperture and the graticule to adjust the refractive power of the reflected light, and at the same time combines the angle information readable on the graticule, it realizes the output of light beams of arbitrary angles and arbitrary refractive powers, thereby realizing the simulation of the refractive state of the human eye in the full field of view, which is beneficial to meet the calibration, verification, measurement accuracy evaluation and other needs of human eye peripheral vision refractive power measurement equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 This is a schematic diagram of the module structure of the first embodiment of the simulated eye with adjustable diopter for the entire visual field of the present application;

[0042] Figure 2 This is a schematic diagram of the module structure of the second embodiment of the simulated eye with adjustable diopter for the entire visual field of the present application;

[0043] Figure 3 This is a front view of the graticule and pinhole array plate in the simulated eye with adjustable diopter in the entire field of view of the present application;

[0044] Figure 4 A schematic diagram of a flow chart of a first embodiment of a calibration method for a diopter measurement device of the present application;

[0045] Figure 5 A schematic diagram of a flow chart of a second embodiment of a calibration method for a diopter measurement device of the present application;

[0046] Figure 6 This is a multi-angle light propagation path diagram in the calibration method of the diopter measurement device of this application.

[0047] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0049] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0050] Reference Figure 1 , Figure 1 This is a schematic diagram of the module structure of the first embodiment of the simulated eye with adjustable diopter over the entire field of view of the present application.

[0051] like Figure 1 As shown, in this embodiment, the simulated eye includes: an aperture 10, a diopter adjustment lens group 20 and a graticule 30 with an angle scale.

[0052] The aperture 10 is used to simulate the pupil of a human eye to receive incident light from the device under test 00 .

[0053] It should be noted that the aperture 10 may be an aperture with an aperture of 3-8 mm, which may be regarded as the pupil point of light, and may be used to simulate the pupil position of the human eye to limit the diameter of light passing through. The aperture 10 may be an aperture with a fixed aperture, or an aperture with an adjustable aperture, which is not limited in this embodiment.

[0054] It should be understood that the device to be tested 00 may be a diopter measuring device with its own light source, such as a diopter measuring device for peripheral vision of human eyes.

[0055] Specifically, the aperture 10 may be an adjustable aperture, and the aperture 10 is used to adjust the incident light from the external light source of the device under test 00 to incident light with a preset diameter.

[0056] The refraction adjustment lens group 20 is used to transmit the incident light to the graticule 30 .

[0057] It should be noted that the diopter adjustment lens group 20 can be used to achieve simulated outputs of different diopters. The aperture 10 and the diopter lens group 20 in the optical path can be designed as a telecentric optical path or a nearly telecentric optical path, and the consistency of the diopter adjustment amount of each field of view during the diopter adjustment process can be ensured.

[0058] It can be understood that the refractive adjustment lens group 20 may include a plurality of lenses in a coaxial state, and the refractive adjustment lens group 20 is designed as a telecentric optical path based on each of the lenses in combination with the aperture 10 .

[0059] Exemplarily, in the refractive adjustment lens group 20, the incident order of the incident light along the optical axis may include: a first lens, a second lens, a third lens, a fourth lens and a fifth lens.

[0060] Among them, the first lens is a concave lens; the second lens is a convex lens, and the curved surface of the second lens is glued to the curved surface of the first lens; the third lens is a convex lens; the fourth lens is a convex lens; the fifth lens is a concave lens, and the curved surface of the fifth lens is glued to the curved surface of the fourth lens.

[0061] In a specific implementation, the above-mentioned refractive adjustment lens group 20 forms a telecentric optical path or a nearly telecentric optical path based on each lens (the first to fifth lenses) and the aperture 10.

[0062] The graticule 30 is used to partially reflect the incident light so that the reflected light returns to the diopter adjustment lens group along the incident light path.

[0063] It should be noted that the graticule 30 has an angle scale, and the incident angle of the incident light from the light source of the device under test can be directly read according to the scale position of the incident light on the graticule. The angle scale can be obtained by pre-experimental calibration and is used to identify the incident angle of the incident light input to the above-mentioned diopter adjustment lens group 20 through the aperture 10.

[0064] It should also be noted that the optical properties of the grating plate 30 can have reflective properties, so that the incident light can be partially reflected at the grating plate 30, so that the obtained reflected light passes through the refractive adjustment lens group 20 along the original incident light path, and returns to the device under test 00 through the aperture 10.

[0065] The diopter adjustment lens group 20 is also used to adjust the diopter of the reflected light to obtain the reflected light after diopter adjustment, so that the reflected light after diopter adjustment continues to return to the device under test 00 along the incident light path.

[0066] It is understandable that the above-mentioned diopter adjustment lens group 20 can be designed as an adjustable lens group, and the lens spacing can be adjusted by moving multiple lenses in the adjustable lens group, thereby realizing the diopter adjustment function of the reflected light (incident light).

[0067] The function of adjusting the diopter of the reflected light (incident light) can also be achieved by translating the graticule 30 .

[0068] In a specific implementation, by translating the refraction adjustment lens group 20 and / or the graticule 30, based on the current detection requirements of the user, the reflected light (incident light) is adjusted to the target diopter, and then the reflected light of the given target diopter is returned to the device under test through the aperture along the incident light path, so that the device under test performs diopter detection on the reflected light to obtain the detection diopter. The detection diopter is compared with the target diopter, and the device is calibrated according to the comparison result.

[0069] The simulated eye of this embodiment includes an aperture, a refractive adjustment lens group and a graticule with an angle scale; the aperture simulates the pupil of a human eye to receive incident light from a light source of the device under test; the refractive adjustment lens group transmits the incident light to the graticule; the graticule reflects the incident light so that the reflected light returns to the refractive adjustment lens group along the incident light path; the refractive adjustment lens group performs diopter adjustment on the reflected light to obtain the reflected light after the diopter adjustment, so that the reflected light after the diopter adjustment continues to return to the device under test along the incident light path. In the present embodiment, the simulated eye receives incident light from different angles emitted by the light source of the device under test through an aperture, and returns it to the device under test along the incident light path through the graticule. Since the refractive adjustment lens group adopted in the present embodiment adjusts the refractive power of the reflected light, combined with the angle information readable on the graticule, the output of light beams of arbitrary angles and arbitrary refractive powers can be realized, thereby realizing the simulation of the refractive state of the human eye in the full field of view, which can meet the requirements of calibration, verification, and measurement accuracy evaluation of human eye peripheral vision refractive power measurement equipment.

[0070] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 , Figure 2 This is a schematic diagram of the module structure of the second embodiment of the simulated eye with adjustable diopter over the entire viewing field of the present application.

[0071] refer to Figure 2 In this embodiment, the simulated eye further includes: an imaging lens group 40 and a CCD camera 60, wherein the imaging lens group 40 makes the photosensitive surfaces of the graticule 30 and the CCD camera 60 in a conjugate state;

[0072] The simulated eye further includes a beam splitter 50 and a surface light source 70 . The beam splitter 50 and the surface light source 70 are located between the imaging lens group 40 and the CCD camera 60 .

[0073] The graticule plate 30 is further used to transmit the incident light so as to transmit the transmitted light to the CCD camera 60 through the imaging lens group 40 .

[0074] It should be noted that the optical property of the graticule 30 may be partially reflective and partially transmissive, so that the transmitted light is transmitted to the CCD camera 60 through the imaging lens group 40 .

[0075] The CCD camera 60 is used to perform photosensitivity imaging based on the transmitted light to obtain a bright spot image reflecting the relative position of the incident light on the graticule 30, so as to determine the incident angle of the incident light at the aperture position according to the bright spot image.

[0076] It should be noted that the CCD camera 60 is a photosensitive imaging device. The incident light converges into a bright spot (or diffuse spot) on the grating plate 30, and the transmitted light propagates to the CCD camera 60 and is photosensitively imaged, so that the CCD camera 60 records a bright spot image (CCD image) reflecting the relative position of the incident light on the grating plate 30.

[0077] It should also be noted that, since the optical path characteristics determine that the angle of the incident light passing through the aperture corresponds to the position coordinates of the convergence point on the graticule, the incident angle, i.e., the angle of the incident light emitted by the light source of the device under test 00 at any position in the field of view can be read out based on the CCD image. And the brightness of the CCD image reflects the intensity of the incident light at the position in the field of view, so analyzing the CCD image information can also obtain the divergence angle range contained in the incident light and the light intensity distribution characteristics of the incident light.

[0078] It is understandable that the CCD camera 60, as a photosensitive imaging device, can greatly facilitate the application of the simulated eye. Based on the CCD camera 60, for example, image recording and storage, dynamic image observation during the adjustment process and optical axis alignment can be realized, and basic image data can be provided for realizing system automatic alignment, automatic measurement, automatic calibration and other functions.

[0079] Furthermore, the grating plate 30 may be equipped with (or replaced with) a pinhole array plate (the grating plate 30 equipped with the pinhole array plate is hereinafter referred to as "pinhole array plate" and is represented as pinhole array plate 30), and the pinhole array plate is replaceable, and is an aperture plate provided with one or more light apertures. Figure 3 , Figure 3 Figure 3-a is a schematic diagram of the reticle. Figure 3Figure 3-b is a schematic diagram of a small hole array plate.

[0080] It should be noted that, by using the replaceable pinhole array plate 30 in conjunction with the surface light source 70, light beam outputs of different refractive powers at specific angle combinations can be achieved.

[0081] The beam splitter 50 is used to reflect the emitted light from the surface light source 70 so as to transmit the emitted light to the pinhole array plate through the imaging lens group 40 .

[0082] It should be noted that the function of the beam splitter 50 is to split a branch of the optical path to facilitate the installation of the surface light source 70. When the external light source from the device under test 00 fails, the internal light source of the simulated eye (i.e., the surface light source 70) can also be enabled to effectively simulate the output of light beams with different refractive powers, so that the simulated eye can work in both the external light source state and the internal light source state, thereby improving the flexibility of the application of the simulated eye.

[0083] The pinhole array plate 30 is used to output the emitted light through pinholes to obtain emitted light at different angles.

[0084] It should be understood that the currently required pinhole array plate 30 can be determined based on different detection requirements. Specifically, the size, shape, position, transmittance and other design elements of the pinhole array can be combined according to the detection requirements to obtain the currently required pinhole array plate 30.

[0085] The CCD camera 60 is further used to image the pinhole array plate 30 through the imaging lens group 40 to obtain a pinhole position image, so as to determine the exit angles of the exit lights at different angles corresponding to the aperture position according to the pinhole position image.

[0086] It should be noted that the emitted light at each angle corresponds to each pinhole, so the pinhole position can also be analyzed based on the pinhole position image recorded by the CCD camera 60 to obtain the emission angle of the emitted light corresponding to the pinhole at the aperture.

[0087] The diopter adjustment lens group 20 is also used to adjust the diopter of the emitted light at different angles to obtain the adjusted emitted light at different angles, so that the adjusted emitted light at different angles is transmitted to the device under test 00 through the aperture 10.

[0088] It should also be noted that the aperture 10 can also adjust the emergent light to emergent light of a preset diameter.

[0089] In a specific implementation, the emitted light from the surface light source 70 is selectively output as a beam with a specific angle combination through the pinhole array plate 30, and then the diopter is adjusted through the diopter adjustment lens group 20, so that the internal light source can be used without relying on the external light source, and the output of beams of different diopters with a specific angle combination can be achieved. That is, based on this embodiment, any required pattern can be projected to any distance.

[0090] In this embodiment, the simulated eye also includes an imaging lens group and a CCD camera. The light projected from the graticule plate passes through the imaging lens group and is imaged at the CCD camera. The photosensitive surface of the CCD camera is conjugate with the graticule plate (or the pinhole array plate), and a bright spot image reflecting the relative position of the incident light on the graticule plate is obtained, so that the incident azimuth of the incident light (the center of the diffuse spot represents the azimuth of the central light beam), the angle range of the incident light (the diameter of the diffuse spot represents the divergence angle of the light beam), and the light intensity angle distribution characteristics of the incident light can be conveniently measured based on the pre-calibrated angle scale information on the graticule plate. Furthermore, the simulated eye also includes a beam splitter and a surface light source, and a pinhole array plate is installed on the graticule plate, so that any desired pattern can be projected to any distance with the help of the internal light source and the pinhole array plate that can be arbitrarily designed and replaced, thereby improving the flexibility of the use of the simulated eye.

[0091] The present application also provides a calibration method for a diopter measurement device based on the above-mentioned simulated eye with adjustable diopter in the whole field of view, referring to Figure 4 , Figure 4 This is a flow chart of a first embodiment of a calibration method for a diopter measurement device of the present application.

[0092] In this embodiment, the calibration method of the diopter measurement device includes: steps S10 to S30:

[0093] Step S10: when receiving incident light from the device under test, obtaining reflected light corresponding to the incident light.

[0094] It should be noted that the method of this embodiment can be applied to a diopter measuring device, such as the calibration process of a diopter measuring device for peripheral vision of the human eye. The executor of the method of this embodiment can be the simulated eye as described above, and the simulated eye can be divided into two modules according to its function: a diopter simulation module and an imaging observation module. Among them, the diopter simulation module may include: an aperture, a diopter adjustment lens group, and a graticule (pinhole array plate) with an angle scale; the imaging observation module may include: an imaging lens group, a beam splitter, a CCD camera, and a surface light source.

[0095] It should be noted that when the simulated eye receives the emitted light from the device under test through the aperture, it can reflect the emitted light through the graticule with partial reflection and partial transmission characteristics, thereby allowing the reflected light to return along the original path of the incident light.

[0096] Step S20: performing diopter adjustment on the reflected light to obtain diopter-adjusted reflected light.

[0097] It should be understood that the target refractive power can be first determined based on the current detection requirements, where the target refractive power is the refractive power of the simulated eye output light, and then the refractive power can be adjusted by translating the refractive adjustment lens group and / or the graticule to adjust the reflected light to the target refractive power.

[0098] Specifically, the position of the grating plate can be translated, and the imaging lens group, the beam splitter, the CCD camera and the surface light source behind it are moved simultaneously, so as to keep the movement synchronous with the grating plate and ensure that the grating plate is imaged clearly on the CCD camera, and the reflected light can be adjusted to the target refractive power, thereby obtaining the reflected light after refractive adjustment.

[0099] Alternatively, the reflected light may be adjusted to the target diopter by translating some lenses in the diopter adjustment lens group to obtain the diopter-adjusted reflected light.

[0100] Step S30: Return the reflected light after the diopter adjustment along the incident light path to the device under test, so that the device under test performs diopter detection based on the reflected light after the diopter adjustment to obtain the detected diopter, and compares the detected diopter value with the adjusted diopter corresponding to the reflected light after the diopter adjustment, and performs calibration according to the comparison result.

[0101] It should be understood that when the reflected light with adjusted diopter is returned to the device under test according to the incident light path, the device under test can perform refractive detection on the light beam with the target refractive power, and obtain the detected refractive power detected by the device under test, and then compare the detected refractive power with the target refractive power to determine whether the detection result of the device under test is accurate through the comparison result, and calibrate the device based on the difference between the target refractive power and the detected refractive power.

[0102] Furthermore, when using an external light source, i.e., the light source of the device under test, to calibrate the device, it is also possible to obtain a bright spot image reflecting the relative position of the incident light on the graticule plate through a CCD camera when incident light from the light source of the device under test is received; thereby determining the incident angle of the incident light based on the bright spot image combined with the scale information of the graticule plate, so that the device under test is calibrated based on the comparison result combined with the incident angle.

[0103] When the simulated eye of this embodiment receives incident light from the light source of the device to be tested, it obtains reflected light corresponding to the incident light; adjusts the diopter of the reflected light to obtain the reflected light after the diopter adjustment; returns the reflected light after the diopter adjustment to the device to be tested along the incident light path, so that the device to be tested performs diopter detection based on the reflected light after the diopter adjustment to obtain the detected diopter, and compares the detected diopter value with the adjusted diopter corresponding to the reflected light after the diopter adjustment, and performs calibration according to the comparison result. Since the simulated eye in this embodiment can perform diopter adjustment on the reflected light corresponding to the incident light of the device to be tested, combined with the angle information that can be read on the graticule, it can realize the output of light beams of arbitrary angles and arbitrary diopters, thereby realizing the simulation of the full-field refractive state of the human eye, and can meet the requirements of calibration, verification, and measurement accuracy evaluation of human eye peripheral vision diopter measurement equipment.

[0104] Based on the first embodiment of the calibration method for the diopter measuring device of the present application, a second embodiment of the calibration method for the diopter measuring device of the present application is proposed, referring to Figure 5 , Figure 5 This is a flow chart of a second embodiment of a calibration method for a diopter measurement device of the present application.

[0105] In this embodiment, considering that some devices under test cannot provide light sources, that is, the external light sources fail, the calibration method of the refractive power measuring device further includes steps S01 to S03:

[0106] Step S01: determining a target angle based on current detection requirements, and determining a current pinhole array plate according to the target angle.

[0107] It should be understood that the target angle can be determined based on the current detection requirements, and the target angle is the angle of the simulated eye output light. Then, the size, shape, position, transmittance and other design elements of the pinhole array can be combined according to the target angle to determine the pinhole array plate currently required.

[0108] Step S02: passing the emitted light generated by the surface light source through the current pinhole array plate to obtain the emitted light corresponding to the target angle, and determining it as the target detection light.

[0109] It is understandable that when the external light source from the device under test fails, the internal light source (i.e., surface light source) of the simulated eye can also be enabled to effectively simulate the output of light beams with different refractive powers, that is, the simulated eye can work in both the external light source state and the internal light source state.

[0110] In a specific implementation, the emitted light generated by the surface light source is selectively propagated at a target angle through the current pinhole array plate, and the emitted light is the target detection light with the target angle.

[0111] It should also be noted that since the outgoing light also needs to pass through the diopter adjustment lens group before it can be transmitted to the device under test, the target diopter can also be determined based on the current detection requirements, and the diopter adjustment can be performed on the outgoing light, so as to finally obtain the target detection light with the target angle and target diopter.

[0112] In addition, the angle information of the light emitted through the current pinhole array plate can also be measured by the above-mentioned CCD camera.

[0113] Step S03: propagate the target detection light to the device under test through an aperture, so that the device under test performs diopter detection and angle detection based on the target detection light to obtain detection results, and performs calibration according to the detection results.

[0114] In a specific implementation, when the target detection light is transmitted through the aperture to the device under test, the device under test can perform diopter detection and angle detection on the light beam having the target angle and target refractive power, and obtain the corresponding detection refractive power and detection angle, respectively, and then compare the detection refractive power with the target refractive power, and compare the detection angle with the target angle, so as to calibrate the device under test or calibrate the device through the comparison results.

[0115] In addition, you can also refer to Figure 6 The light propagation path in the calibration method of the diopter measurement device of the present application is described. Figure 6 This is a multi-angle light propagation path diagram in the calibration method of the diopter measurement device of this application.

[0116] exist Figure 6 In the simulation eye, the simulation eye can be divided into two modules according to its function: a diopter simulation module and an imaging observation module. The diopter simulation module may include: an aperture, a diopter adjustment lens group, and a graticule with an angle scale (a pinhole array plate); the imaging observation module may include: an imaging lens group, a beam splitter, a CCD camera, and a surface light source.

[0117] The refractive power simulation module can be designed as a telecentric optical path or a nearly telecentric optical path, which can be more easily connected with the optical path in the imaging observation module (which can also be designed as a telecentric optical path), thereby ensuring the performance reliability of the simulated eye.

[0118] exist Figure 6 In the figure, the blue line, green line, and red line represent the light propagation paths for different incident light angles / output beam angles (target angles), respectively.

[0119] This embodiment determines the target angle based on the current detection requirements, and determines the current pinhole array plate according to the target angle; the emitted light generated by the surface light source is propagated through the current pinhole array plate to obtain the emitted light corresponding to the target angle, and is determined as the target detection light; the target detection light is propagated to the device under test through an aperture, so that the device under test performs diopter detection and angle detection based on the target detection light to obtain the detection result, and calibrates according to the detection result. This embodiment can use the internal light source without relying on the external light source when the external light source fails, and realize the output of light beams of different diopters in a specific angle combination, which is conducive to improving the flexibility of the calibration of the diopter measurement equipment.

[0120] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other elements in the process, method, article or system including the element.

[0121] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0122] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0123] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A simulated eye with adjustable diopter for the entire visual field, characterized in that: The simulated eye comprises: an aperture, a diopter adjustment lens group and a graticule with angle scales; The aperture is used to simulate the pupil of a human eye to receive incident light from the device under test; The refractive adjustment lens group is used to transmit the incident light to the reticle; The graticule is used to partially reflect the incident light so that the reflected light returns to the diopter adjustment lens group along the incident light path; The diopter adjustment lens group is also used to adjust the diopter of the reflected light to obtain the reflected light after diopter adjustment, so that the reflected light after diopter adjustment continues to return to the device under test along the incident light path.

2. The full-field diopter adjustable simulated eye according to claim 1, characterized in that: The simulated eye further comprises: an imaging lens group and a CCD camera, wherein the imaging lens group makes the graticule and the photosensitive surface of the CCD camera in a conjugate state; The graticule is further used to transmit the incident light, so as to propagate the transmitted light to the CCD camera through the imaging lens group; The CCD camera is used to perform photosensitivity imaging based on the transmitted light to obtain a bright spot image reflecting the relative position of the incident light on the graticule, so as to determine the incident angle of the incident light corresponding to the aperture position according to the bright spot image.

3. The simulated eye with adjustable diopter for the entire visual field as claimed in claim 2, characterized in that: The simulated eye further comprises: a beam splitter and a surface light source, wherein the beam splitter and the surface light source are located between the imaging lens group and the CCD camera; a replaceable pinhole array plate is mounted on the graticule; The beam splitter is used to reflect the emitted light of the surface light source so as to transmit the emitted light to the pinhole array plate through the imaging lens group; The pinhole array plate is used to output the emitted light through the pinholes to obtain emitted light at different angles; The CCD camera is further used to image the pinhole array plate through the imaging lens group to obtain a pinhole position image, so as to determine the exit angles of the exit lights at different angles corresponding to the aperture position according to the pinhole position image; The refractive adjustment lens group is also used to adjust the diopter of the emergent light at different angles to obtain the emergent light at different angles after adjustment, so that the emergent light at different angles after adjustment is transmitted to the device under test through the aperture.

4. The full-view diopter adjustable simulated eye according to claim 1, characterized in that: The aperture is an adjustable aperture; The aperture is also used to adjust the incident light from the external light source of the device under test to incident light of a preset diameter; The aperture is also used to adjust the emergent light to emergent light of a preset diameter.

5. The full-view diopter adjustable simulated eye according to claim 1, characterized in that: The refractive adjustment lens group includes a plurality of coaxial lenses, and the refractive adjustment lens group and the aperture are designed as a telecentric optical path.

6. The simulated eye with adjustable diopter for the entire visual field as claimed in claim 5, characterized in that: The refraction adjustment lens group includes, in order of the incident light along the optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens.

7. A method for calibrating a diopter measurement device of a simulated eye with adjustable diopter in the whole field of view according to any one of claims 1 to 6, characterized in that: The method comprises: When receiving incident light from the device under test, obtaining reflected light corresponding to the incident light; Performing diopter adjustment on the reflected light to obtain diopter-adjusted reflected light; The reflected light after the diopter adjustment is returned to the device under test along the incident light path, so that the device under test performs diopter detection based on the reflected light after the diopter adjustment to obtain the detected diopter, and compares the detected diopter value with the adjusted diopter corresponding to the reflected light after the diopter adjustment, and performs calibration according to the comparison result.

8. The method according to claim 7, characterized in that The step of adjusting the diopter of the reflected light to obtain the reflected light after the diopter adjustment comprises: Determine the target diopter based on current testing needs; By translating the graticule, the reflected light is adjusted to the target diopter, thereby obtaining the reflected light after diopter adjustment; Alternatively, the reflected light is adjusted to the target diopter by translating some lenses in the diopter adjustment lens group to obtain the reflected light with adjusted diopter.

9. The method according to claim 7, characterized in that The method further comprises: Determine a target angle based on current detection requirements, and determine a current pinhole array plate according to the target angle; Passing the emitted light generated by the surface light source through the current pinhole array plate to obtain the emitted light corresponding to the target angle, and determining it as the target detection light; The target detection light is transmitted to the device under test through an aperture, so that the device under test performs diopter detection and angle detection based on the target detection light to obtain detection results, and performs calibration according to the detection results.

10. The method according to claim 7, characterized in that The method further comprises: When receiving incident light from a light source of the device to be tested, a bright spot image reflecting a relative position of the incident light on the graticule is obtained by a CCD camera; The incident angle of the incident light is determined according to the bright spot image in combination with the scale information of the graticule, so that the device under test is calibrated according to the comparison result in combination with the incident angle.

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