A method, device and equipment for measuring the diopter of an optical module of a head-mounted device

Abstract

The present invention discloses a method for measuring the diopter of an optical module of a head-mounted device, which is applied to the technical field of head-mounted devices. The method is applied to a diopter measurement device provided with a chart module, a collimating device, an optical module to be measured, and an image acquisition module along the light transmission direction, and includes: moving the chart in the chart module to an initial position in advance, where the initial position is obtained in advance; adjusting the position of the chart module, and obtaining each chart image of the chart through the image acquisition module; obtaining the chart position corresponding to the chart image with the highest clarity; calculating the diopter of the optical module to be measured based on the initial position, the chart position, and a pre-designed calculation relationship. The diopter measurement process in the present invention is simple, the measurement efficiency is high, the equipment cost is simple, and it can be applied to production testing. The present invention also discloses a device and equipment for measuring the diopter of an optical module of a head-mounted device, which have the same beneficial effects as described above.

Description

Technical Field

[0001] The present invention relates to the technical field of head-mounted devices, and in particular, to a method, device, and equipment for measuring the diopter of an optical module of a head-mounted device. Background Art

[0002] A head-mounted device (such as an AR product) has a variety of optical elements as a whole, such as a waveguide (or free-form surface), a visual sensor Visor, a display Display, and positive and negative lenses, as Figure 1-1 shown. The AR product is designed with two sets of optical paths for the user to combine the virtual scene with the real scene to achieve the purpose of augmented reality. Among them, the first set of optical paths (virtual optical paths) is that the picture displayed by the Display forms a virtual image with a limited distance through the waveguide and the negative lens and is transmitted to the user, which is the virtual scene; the second set of optical paths (real optical paths) is that the real-world target object is transmitted to the user through the Visor, the positive lens, the waveguide (or free-form surface), and the negative lens, which is the real scene, as Figure 1-2 shown.

[0003] For an ideal AR product, the effective focal lengths of the positive lens and the negative lens are equal in magnitude and opposite in sign, and the two cancel each other out without affecting the optical path, that is, the diopter of the whole product is 0. However, due to the influence of the actual optical element processing accuracy and assembly process, the AR whole machine will inevitably have a certain diopter. If the absolute value of the diopter is too large, the user will not be able to normally observe the real-world target object. Therefore, it is important to measure the diopter of the AR positive electrode.

[0004] Currently, the existing diopter measurement devices are as follows: One type is the computerized lensometer in the medical field, such as NIDEK LP LM-1800PD. The test accuracy of such devices is low and does not meet the test requirements of AR products; one type is the laboratory equipment for measuring the high-precision lens EFL, such as Trioptics HR, Phasics SID4, etc. The former cannot meet the test range of AR products, and the latter is expensive and the test process is complex and inefficient, and it is not suitable for production testing.

[0005] In view of this, how to provide a method, device, and equipment for measuring the diopter of an optical module of a head-mounted device with low test cost and simple process has become a problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the embodiments of the present invention is to provide a method, device, and equipment for measuring the diopter of an optical module of a head-mounted device, which are simple and efficient in the measurement process during use, have a simple equipment cost, and can be applicable to production testing.

[0007] To solve the above technical problems, an embodiment of the present invention provides a method for measuring the diopter of an optical module of a head-mounted device, which is applied to a diopter measurement device provided with a chart module, a collimating device, an optical module to be measured, and an image acquisition module along the light transmission direction, including:

[0008] Pre-move the chart in the chart module to the initial position, where the initial position is pre-obtained;

[0009] Adjust the position of the chart module, and obtain each chart image of the chart through the image acquisition module;

[0010] Obtain the chart position corresponding to the chart image with the highest clarity;

[0011] Based on the initial position, the chart position, and a pre-designed calculation relationship, calculate the diopter of the optical module to be measured.

[0012] Optionally, the calculating the diopter of the optical module to be measured based on the initial position, the chart position, and a pre-designed calculation relationship includes:

[0013] Based on the initial position and the chart position, determine the moving distance of the chart;

[0014] Based on the moving distance and a pre-designed calculation relationship, calculate the diopter of the optical module to be measured; where:

[0015] The pre-designed calculation relationship is:

[0016] Diopter = 1 / F sam , F sam represents the effective focal length of the optical module to be measured, F1 represents the front focal length of the collimating device, F1' represents the rear focal length of the collimating device, L represents the moving distance of the chart, and D represents the distance from the test position to the collimating device.

[0017] Optionally, the initial position being pre-obtained includes:

[0018] When the optical module to be measured is not placed, adjust the position of the chart module, and obtain each initial chart image of the chart through the image acquisition module;

[0019] Take the chart position corresponding to the initial chart image with the highest clarity as the initial position.

[0020] Optionally, the chart module is arranged on a driving module;

[0021] The adjusting the position of the chart module includes:

[0022] Control the driving module to drive the graphics card module to move, so as to adjust the position of the graphics card module.

[0023] Optionally, obtaining each graphics card image of the graphics card through the image acquisition module includes:

[0024] The driving module drives the graphics card to move a preset distance each time, and controls the image acquisition module to obtain a graphics card image of the graphics card.

[0025] Optionally, obtaining the graphics card position corresponding to the graphics card image with the highest clarity includes:

[0026] Calculate the clarity of each graphics card image;

[0027] Based on each of the clarities and the position corresponding to each graphics card image, fit a fitting curve of clarity and position;

[0028] Based on the fitting curve, determine the graphics card position corresponding to the graphics card image with the highest clarity.

[0029] Optionally, the optical module to be measured is the left eyeglass module or the right eyeglass module of the head-mounted device.

[0030] An embodiment of the present invention further provides a diopter measurement device for an optical module of a head-mounted device, which is applied to a diopter measurement device provided with a graphics card module, a collimating device, an optical module to be measured, and an image acquisition module along the light emission direction, including:

[0031] A moving module, configured to pre-move the graphics card in the graphics card module to an initial position, and the initial position is obtained in advance;

[0032] A control module, configured to adjust the position of the graphics card module, and obtain each graphics card image of the graphics card through the image acquisition module;

[0033] An acquisition module, configured to acquire the graphics card position corresponding to the graphics card image with the highest clarity;

[0034] A calculation module, configured to calculate the diopter of the optical module to be measured based on the initial position, the graphics card position, and a pre-designed calculation relationship.

[0035] An embodiment of the present invention further provides a diopter measurement device for an optical module of a head-mounted device, including: a processor, a driving module, a graphics card module arranged along the light emission direction, a collimating device, an optical module to be measured, and an image acquisition module. The graphics card module is arranged on the driving module, and the processor is connected to the driving module and the image acquisition module;

[0036] The processor is configured to control the driving module to drive the graphics card module to move to the initial position and control the driving module to adjust the position of the graphics card module;

[0037] The image acquisition module is configured to acquire respective graphics card images of the graphics card during the movement of the graphics card module;

[0038] The processor is configured to, based on each of the graphics card images, obtain the graphics card position corresponding to the graphics card image with the highest clarity, and calculate the diopter of the optical module to be measured based on the initial position, the graphics card position, and a pre-designed calculation relationship.

[0039] Optionally, the driving module is a driving module.

[0040] A method for measuring the diopter of an optical module of a head-mounted device provided in an embodiment of the present invention is applied to a diopter measurement device provided with a graphics card module, a collimating device, an optical module to be measured, and an image acquisition module along the light transmission direction, and includes: pre-moving the graphics card in the graphics card module to the initial position, where the initial position is pre-acquired; adjusting the position of the graphics card module, and acquiring respective graphics card images of the graphics card through the image acquisition module; obtaining the graphics card position corresponding to the graphics card image with the highest clarity; and calculating the diopter of the optical module to be measured based on the initial position, the graphics card position, and a pre-designed calculation relationship.

[0041] It can be seen that in the embodiment of the present invention, by pre-moving the graphics card in the graphics card module to the initial position, light passes through the graphics card, the collimating device, and the optical module to be measured and reaches the image acquisition module during propagation, and the position of the graphics card module is adjusted until the graphics card image with the highest clarity is acquired, and the graphics card position corresponding to the graphics card image with the highest clarity is determined. Then, according to the initial position, the graphics card position corresponding to the graphics card image with the highest clarity, and the pre-designed calculation formula, the diopter of the optical module to be measured can be calculated. As can be seen from the above, the diopter measurement process in the present invention is simple, the measurement efficiency is high, the equipment cost is simple, and it can be applied to production testing. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the prior art and the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a schematic flowchart of a method for measuring the diopter of an optical module of a head-mounted device provided in an embodiment of the present invention;

[0044] Figure 2Schematic diagram of a diopter measurement device provided by an embodiment of the present invention;

[0045] Figure 3 Schematic diagram of a structure before placing an optical module to be measured provided by an embodiment of the present invention;

[0046] Figure 4 Schematic diagram of a structure after placing an optical module to be measured provided by an embodiment of the present invention;

[0047] Figure 5 Schematic diagram of a chart provided by an embodiment of the present invention;

[0048] Figure 6 Chart image provided by an embodiment of the present invention;

[0049] Figure 7 Fitting curve of image sharpness and chart position provided by an embodiment of the present invention;

[0050] Figure 8 Schematic diagram of a structure of a diopter measurement device for an optical module of a head-mounted device provided by an embodiment of the present invention;

[0051] Figure 9 Schematic diagram of a structure of a diopter measurement device for an optical module of a head-mounted device provided by an embodiment of the present invention. Detailed implementation manners

[0052] An embodiment of the present invention provides a method, device and equipment for measuring the diopter of an optical module of a head-mounted device. During the use process, the measurement process is simple and efficient, and the equipment cost is low, and it can be applied to production testing.

[0053] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a method for measuring the diopter of an optical module of a head-mounted device provided by an embodiment of the present invention. This measurement method is applied to a diopter measurement device provided with a chart module, a collimating device, an optical module to be measured, and an image acquisition module along the light transmission direction, and includes:

[0055] S110: Move the chart in the chart module to the initial position in advance, and the initial position is obtained in advance;

[0056] It should be noted that the method in the embodiments of the present invention is applied to a refractive power measurement device as shown in Figure 2 wherein the chart module includes a light source and a chart. The light source is used to illuminate the chart after being turned on, and the relative positions of the light source and the chart are fixed. The light source is placed on one side of the chart, and on the other side of the chart, a collimating device, a base of the product to be measured, and an image acquisition module are sequentially arranged along the optical path. The collimating device is used to convert the received light into parallel light and emit it. In practical applications, the image acquisition module can be a camera, and the collimating device can be a collimating mirror.

[0057] Specifically, in practical applications, the initial position of the chart can be determined in advance. At this initial position, the chart image obtained by the image acquisition module is the clearest. When measuring the refractive power of the optical module to be measured, the chart in the chart module can be first moved to the pre-determined initial position, specifically, the position of the chart module can be moved by controlling the moving module.

[0058] S120: Adjust the position of the chart module, and obtain each chart image of the chart through the image acquisition module;

[0059] It should be noted that in practical applications, a base of the product to be measured can be set to fix the optical module to be measured to ensure the position consistency of each optical module to be measured. Specifically, after moving the chart to the initial position, the optical module to be measured can be placed on the base of the product to be measured, so that the light passes through the chart, the collimating device, the optical module to be measured and reaches the image acquisition module during the propagation process. Then, continue to adjust the position of the chart module, and continuously obtain chart images through the image acquisition module.

[0060] S130: Obtain the chart position corresponding to the chart image with the highest clarity;

[0061] Specifically, determine the chart image with the highest clarity by analyzing each chart image, and obtain the chart position corresponding to the chart image with the highest clarity.

[0062] S140: Calculate the refractive power of the optical module to be measured based on the initial position, the chart position and the pre-designed calculation relationship.

[0063] In practical applications, the pre-designed calculation relationship for calculating the refractive power can be determined in advance. Then, after obtaining the initial position and the chart position corresponding to the chart image with the highest clarity, the refractive power of the optical module to be measured can be calculated through the initial position, the chart position and the pre-designed calculation relationship. The optical module to be measured can specifically be the left eyeglass module or the right eyeglass module of a head-mounted device (AR device).

[0064] Further, calculating the diopter of the optical module to be measured based on the initial position, the position of the chart card, and the pre-designed calculation relationship includes:

[0065] Determining the moving distance of the chart card based on the initial position and the position of the chart card;

[0066] Calculating the diopter of the optical module to be measured based on the moving distance and the pre-designed calculation relationship; where:

[0067] The pre-designed calculation relationship is:

[0068] Diopter = 1 / F sam , F sam represents the effective focal length of the optical module to be measured, F1 represents the front focal length of the collimating device, F1' represents the rear focal length of the collimating device, L represents the moving distance of the chart card, and D represents the distance from the test position to the collimating device.

[0069] It should be noted that in practical applications, the pre-designed calculation relationship can be determined according to experience. For example, Figure 3 as shown, for example, the focal length of the observation camera is F1, the chart card is placed at the focus of the collimating device, a backlight source is placed behind, the outgoing light beam is parallel light, and the observation camera behind the collimating device needs to focus on infinity to capture the image of the chart card. Fix the observation camera, and then place the product to be measured on the base of the product to be measured behind the collimating device (as Figure 4 shown), where the distance between the collimating device and the base of the product to be measured is D. Adjust the position of the chart card until the observation camera captures the chart card image with the highest clarity again. Then, according to the Gaussian formula:

[0070] where, F1 is the front focal length of the collimating device, F1' represents the rear focal length of the collimating device, L is the moving distance of the chart card, where moving to the left is positive, and F sam represents the effective focal length of the optical module to be measured. Thus, it can be obtained that:

[0071] Diopter = 1 / F sam , where

[0072] Then, in the actual measurement process, the moving distance of the chart card from the initial position to the position corresponding to the chart card image with the highest clarity can be calculated based on the initial position of the chart card and the position of the chart card corresponding to the chart card image with the highest clarity. Then, based on this moving distance and the above preset relationship, the diopter of the optical module to be measured can be calculated. Among them, F1, F1', L, and D in the preset relationship can all be measured in advance.

[0073] Further, the above initial position is obtained in advance, and specifically may include:

[0074] When the optical module to be measured is not placed, the position of the chart module is adjusted, and each initial chart image of the chart is obtained through the image acquisition module;

[0075] The position of the chart corresponding to the initial chart image with the highest clarity is taken as the initial position.

[0076] It can be understood that in practical applications, in the embodiments of the present invention, at the initial stage of measurement, the light source (specifically, a planar light source) in the chart module can be turned on. When the optical module to be measured is not placed on the base of the product to be measured, the position of the chart module is adjusted. The image acquisition module (such as an observation camera) continuously obtains the initial chart images of the chart, determines the initial chart image with the highest clarity, and then takes the position corresponding to this initial chart image with the highest clarity as the initial position and records this initial position. Correspondingly, the positions of the collimating device, the base of the product to be measured, and the camera should also be recorded. After determining this initial position, when measuring the product to be measured subsequently, the collimating device, the base of the product to be measured, and the camera are all placed at their corresponding positions, and then the chart is moved to the initial position and subsequent diopter measurements are carried out. Of course, in practical applications, when performing diopter measurements on each product to be measured, the initial position can be obtained through the above method, and after determining the initial position, the product to be measured is measured based on this initial position. The product to be measured can be a head-mounted device to be measured, and specifically, the diopters of the left and right lens modules of the head-mounted device to be measured are measured.

[0077] Furthermore, the chart module can be arranged on the driving module;

[0078] Then, the process of adjusting the position of the chart module specifically may include:

[0079] Control the driving module to drive the chart module to move to adjust the position of the chart module.

[0080] It should be noted that in practical applications, the chart module can be moved through the driving module, that is, the chart module can be arranged on the driving module, and then the driving module is controlled to drive the chart module to move, so as to realize the adjustment of the position of the chart module. Among them, in practical applications, the driving module can be an electric cylinder.

[0081] Further, the process of obtaining each chart image of the chart through the image acquisition module may include:

[0082] The driving module drives the chart to move a preset distance each time, and controls the image acquisition module to obtain a chart image of the chart.

[0083] It should be noted that the control drives the movement of the driving module, and every time the driving module moves a preset distance, the control commands the image acquisition module to acquire an image of a card, so as to obtain multiple card images, and each card image corresponds to a card position.

[0084] Furthermore, the process of obtaining the card position corresponding to the card image with the highest clarity may specifically include:

[0085] Calculate the clarity of each card image;

[0086] Based on each clarity and the position corresponding to each card image, fit a fitting curve of clarity versus position;

[0087] Based on the fitting curve, determine the card position corresponding to the card image with the highest clarity.

[0088] It should be noted that in the embodiments of the present invention, according to each card image collected by the image acquisition module, each card image is analyzed to calculate the clarity of each card image, and then each clarity and the corresponding position are fitted to obtain a fitting curve, and then based on the fitting curve, the position of a card image with the highest clarity is determined, and this position is used as the final card position.

[0089] In practical applications, the photosensitive module to be tested can be the left eyeglass module or the right eyeglass module of a head-mounted device. The following takes the eyeglass module of a head-mounted device as an example for illustration:

[0090] Turn on the planar light source. Under the condition that the product to be tested is not placed, the driving module drives the card (as shown in Figure 5 ) and the light source to move synchronously until the observation camera captures the clearest image formed by the card, as shown in Figure 6 . Record the position of the card at this time as L0;

[0091] Place the right eyeglass module of the product to be tested at the test position (i.e., the product to be tested). The driving module drives the card to move until the observation camera captures the clearest image formed by the card again. Record the position of the card at this time as L1 (initial position), then LR = L1 - L0 (as shown in Figure 7 ). Then substitute this LR as L into the pre-designed calculation relationship Diopter = 1 / F sam , where , and the diopter of the right eyeglass module can be obtained.

[0092] Then place the left eyeglass module of the product to be tested at the test position. The driving module drives the card to move until the observation camera captures the clearest image formed by the card again. Record the position of the card at this time as L2, then LL = L2 - L0. Then substitute this LL as L into the pre-designed calculation relationship Diopter = 1 / Fsam , wherein, in it, the diopter of the right eyeglass module can be obtained.

[0093] For example, if the front and rear focal lengths of the collimating device are 500 nm, the distance between the collimating device and [object] is 100 mm, and the test specification of the tentative diopter is ±0.125 D (D here is the unit of diopter), then the diopter at this time is Diopter = 2.5 - 1.25 / (0.8L + 0.5). If the accuracy of the driving module is 0.01 mm, then the ideal resolution of this diopter measuring device can reach 0.00012 D (diopter unit).

[0094] Table 1 shows the diopter test data (3 products (DUT 1, DUT 2, DUT 3), 3 times of repeated pick-and-place tests). It can be seen that the repeatability of this diopter test system can reach 0.01 D (diopter unit).

[0095]

[0096] It can be seen that in the embodiment of the present invention, by pre-moving the chart in the chart module to the initial position, the light passes through the chart, the collimating device, the optical module to be measured and reaches the image acquisition module during the propagation process, and the position of the chart module is adjusted until the chart image with the highest clarity is obtained, and the chart position corresponding to the chart image with the highest clarity is determined. Then, according to the initial position, the chart position corresponding to the chart image with the highest clarity and the pre-designed calculation formula, the diopter of the optical module to be measured can be calculated. As can be seen from the above, the diopter measurement process in the present invention is simple, the measurement efficiency is high, the equipment cost is low, and it can be applied to production testing.

[0097] Please refer to Figure 8 , on the basis of the above embodiments, the embodiment of the present invention further provides an optical module diopter measurement device for a head-mounted device, which is applied to a diopter measurement device provided with a chart module, a collimating device, an optical module to be measured and an image acquisition module along the light transmission direction. The device includes:

[0098] A moving module 11, configured to pre-move the chart in the chart module to the initial position, and the initial position is pre-obtained;

[0099] A control module 12, configured to adjust the position of the chart module and obtain each chart image of the chart through the image acquisition module;

[0100] An acquisition module 13, configured to obtain the chart position corresponding to the chart image with the highest clarity;

[0101] A calculation module 14, configured to calculate the diopter of the optical module to be measured based on the initial position, the chart position and the pre-designed calculation relationship.

[0102] It should be noted that the method for measuring the diopter of the optical module of the head-mounted device in the embodiments of the present invention has the same beneficial effects as the device for measuring the diopter of the optical module of the head-mounted device involved in the above embodiments. For the specific introduction of the method for measuring the diopter of the optical module of the head-mounted device involved in the embodiments of the present invention, please refer to the above embodiments, and the present invention will not repeat them here.

[0103] Based on the above embodiments, the embodiments of the present invention further provide a device for measuring the diopter of the optical module of a head-mounted device, as Figure 9 shown. It includes: a processor, a driving module, a pattern card module arranged along the light transmission direction, a collimating device, an optical module to be measured, and an image acquisition module. The pattern card module is arranged on the driving module, and the processor is connected to the driving module and the image acquisition module;

[0104] The processor is configured to control the driving module to drive the pattern card module to move to the initial position and control the driving module to adjust the position of the pattern card module;

[0105] The image acquisition module is configured to acquire various pattern card images of the pattern card during the movement of the pattern card module;

[0106] The processor is configured to obtain the pattern card position corresponding to the pattern card image with the highest clarity based on each pattern card image, and calculate the diopter of the optical module to be measured based on the initial position, the pattern card position, and a pre-designed calculation relationship.

[0107] Among them, in practical applications, the driving module can be a movable part.

[0108] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0109] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device 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 device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0110] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0111] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0112] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for measuring the diopter of an optical module of a head-mounted device, characterized in that, Applied to a diopter measurement device provided with a chart module, a collimating device, a to-be-tested optical module, and an image acquisition module along the light transmission direction, comprising: Pre-move the chart in the chart module to the initial position, where the initial position is pre-acquired; After placing the to-be-tested optical module at the test position, adjust the position of the chart module, and obtain each chart image of the chart through the image acquisition module; Obtain the chart position corresponding to the chart image with the highest clarity; Based on the initial position, the chart position, and a pre-designed calculation relationship, calculate the diopter of the to-be-tested optical module; where: The calculating the diopter of the to-be-tested optical module based on the initial position, the chart position, and the pre-designed calculation relationship includes: Based on the initial position and the chart position, determine the moving distance of the chart; Based on the moving distance and the pre-designed calculation relationship, calculate the diopter of the to-be-tested optical module; where: The pre-designed calculation relationship is: , , represents the effective focal length of the optical module to be measured, represents the front focal length of the collimating device, represents the rear focal length of the collimating device, represents the moving distance of the chart, represents the distance from the test position to the collimating device; The initial position being pre-acquired includes: when the to-be-tested optical module is not placed, adjust the position of the chart module, and obtain each initial chart image of the chart through the image acquisition module; take the chart position corresponding to the initial chart image with the highest clarity as the initial position.

2. The method for measuring the diopter of the optical module of the head-mounted device according to claim 1, wherein The chart module is arranged on a driving module; The adjusting the position of the chart module includes: Control the driving module to drive the chart module to move so as to adjust the position of the chart module.

3. The method for measuring the diopter of the optical module of the head-mounted device according to claim 2, wherein The obtaining each chart image of the chart through the image acquisition module includes: When the driving module drives the chart to move a preset distance each time, control the image acquisition module to obtain a chart image of the chart.

4. The method for measuring the diopter of the optical module of the head-mounted device according to claim 2, wherein, The obtaining the chart position corresponding to the chart image with the highest clarity includes: Calculate the clarity of each chart image; Based on each clarity and the position corresponding to each chart image, fit a fitting curve of clarity and position; Based on the fitting curve, determine the chart position corresponding to the chart image with the highest clarity.

5. The method for measuring the diopter of the optical module of the head-mounted device according to claim 1, characterized in that, The to-be-tested optical module is the left eyeglass module or the right eyeglass module of a head-mounted device.

6. An apparatus for measuring the diopter of an optical module of a head-mounted device, characterized in that, Applied to a diopter measurement device provided with a chart module, a collimating device, a to-be-tested optical module, and an image acquisition module along the light transmission direction, comprising: A moving module, configured to pre-move the chart in the chart module to the initial position, where the initial position is pre-acquired; A control module, configured to adjust the position of the chart module after placing the to-be-tested optical module at the test position, and obtain each chart image of the chart through the image acquisition module; An obtaining module, configured to obtain the chart position corresponding to the chart image with the highest clarity; A calculating module, configured to calculate the diopter of the to-be-tested optical module based on the initial position, the chart position, and a pre-designed calculation relationship; where: The calculating the diopter of the to-be-tested optical module based on the initial position, the chart position, and the pre-designed calculation relationship includes: Based on the initial position and the chart position, determine the moving distance of the chart; Based on the moving distance and a pre-designed calculation relationship, calculate the diopter of the optical module to be measured; where: The pre-designed calculation relationship is: , , represents the effective focal length of the optical module to be measured, represents the front focal length of the collimating device, represents the rear focal length of the collimating device, represents the moving distance of the chart, represents the distance from the test position to the collimating device; The initial position is obtained in advance, including: when the optical module to be measured is not placed, adjusting the position of the chart module, and acquiring each initial chart image of the chart through the image acquisition module; taking the chart position corresponding to the initial chart image with the highest clarity as the initial position.

7. An optical module diopter measuring device for a head-mounted device, characterized in that, Including: A processor, a driving module, a chart module arranged along the light transmission direction, a collimating device, an optical module to be measured, and an image acquisition module. The chart module is arranged on the driving module, and the processor is connected to the driving module and the image acquisition module; The processor is configured to control the driving module to drive the chart module to move to the initial position, and after placing the optical module to be measured at the test position, control the driving module to adjust the position of the chart module; The image acquisition module is configured to acquire each chart image of the chart during the movement of the chart module; The processor is configured to, based on each of the chart images, obtain the chart position corresponding to the chart image with the highest clarity, and calculate the diopter of the optical module to be measured based on the initial position, the chart position, and the pre-designed calculation relationship; where: Calculating the diopter of the optical module to be measured based on the initial position, the chart position, and the pre-designed calculation relationship includes: Determining the moving distance of the chart based on the initial position and the chart position; Based on the moving distance and the pre-designed calculation relationship, calculate the diopter of the optical module to be measured; where: The pre-designed calculation relationship is: , , represents the effective focal length of the optical module to be measured, represents the front focal length of the collimating device, represents the rear focal length of the collimating device, represents the moving distance of the chart, represents the distance from the test position to the collimating device; The initial position is obtained in advance, including: when the optical module to be measured is not placed, adjusting the position of the chart module, and acquiring each initial chart image of the chart through the image acquisition module; taking the chart position corresponding to the initial chart image with the highest clarity as the initial position.

8. The diopter measurement device for the optical module of the head-mounted device according to claim 7, characterized in that The driving module is a movable part.

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