Light machine assembling method, device and equipment and medium

Abstract

The invention discloses a light machine assembly method, device and equipment and a medium. The method comprises the following steps: respectively clamping and controlling a fixed-focus camera module, a light screen, a target lens assembly and a target screen assembly to be sequentially arranged according to a target direction and keep a preset state; controlling the fixed-focus camera module to monitor an actual image on the optical screen; adjusting the relative position of the optical screen and the target lens assembly in the target direction; detecting a target distance between any two of the optical screen, the target lens assembly and the target screen assembly when the target image is presented on the optical screen; determining a target object distance of the target lens assembly according to the target distance and a preset target image distance corresponding to the target lens assembly; the target lens assembly and the target screen assembly are bonded, the object distance between the target lens assembly and the target screen assembly after bonding is the target object distance, and a target ray machine is obtained. According to the invention, an expensive human eye camera is prevented from being used for assisting in assembling ray machine equipment, and the assembly cost of the ray machine is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical devices, and in particular, to an optical machine assembly method, device, equipment and medium. Background Art

[0002] An optical machine is an optical component used to observe a projection screen in a virtual reality device (VR device, Virtual Reality), and is an important component affecting the size and quality of the VR device. In related technologies, the assembly of the optical machine mainly relies on a human eye camera, but the human eye camera is expensive, resulting in a high assembly cost of the optical machine. Therefore, how to reduce the assembly cost of the optical machine is an urgent problem to be solved currently. Summary of the Invention

[0003] By providing an optical machine assembly method, device, equipment and medium in an embodiment of the present application, the technical problem in the prior art that a human eye camera needs to be used for assembling the optical machine, resulting in a high assembly cost, is solved, and the technical effect of assembling the optical machine on the premise of avoiding using a human eye camera and reducing the assembly cost of the optical machine is achieved.

[0004] In a first aspect, the present application provides an optical machine assembly method, and the method includes:

[0005] Clamping and controlling a fixed-focus imaging module, a light screen, a target lens assembly and a target screen assembly respectively to be arranged in sequence in a target direction and maintain a preset state;

[0006] Controlling the fixed-focus imaging module to monitor an actual image on the light screen, where the actual image is a real image collected by the target lens assembly for the target screen assembly and presented on the light screen;

[0007] Adjusting the relative positions of the light screen and the target lens assembly in the target direction until the actual image becomes a target image that is equal in size and inverted with respect to the target screen assembly;

[0008] Detecting a target distance between any two of the light screen, the target lens assembly and the target screen assembly when the target image is presented on the light screen;

[0009] Determining a target object distance of the target lens assembly according to the target distance and a preset target image distance corresponding to the target lens assembly;

[0010] Bonding the target lens assembly and the target screen assembly, and the object distance between the bonded target lens assembly and the target screen assembly is the target object distance, so as to obtain a target optical machine.

[0011] Further, clamping and controlling the fixed-focus imaging module, the light screen, the target lens assembly and the target screen assembly respectively to be arranged in sequence in the target direction and maintain a preset state includes:

[0012] Clamp and fix the fixed-focus camera module and the target screen component at their respectively corresponding preset positions to form a target direction;

[0013] Clamp the light screen and the target lens component, and arrange them in sequence along the target direction in the area between the fixed-focus camera module and the target screen component;

[0014] The preset state includes that the light screen is always within the shooting range of the fixed-focus camera module, the target screen component is always within the shooting range of the target lens component, and the target lens component always forms an image on the light screen.

[0015] Further, controlling the fixed-focus camera module to monitor the actual image on the light screen includes:

[0016] Control the fixed-focus camera module to monitor the actual image on the light screen;

[0017] Detect the actual size of the actual image;

[0018] When the actual size is not the same as the screen size of the target screen component, perform the step of adjusting the relative positions of the light screen and the target lens component in the target direction;

[0019] When the actual size is the same as the screen size of the target screen component and the actual image is in the opposite direction to the target screen component, perform the step of detecting the target distance between any two of the light screen, the target lens component, and the target screen component when the target image is presented on the light screen.

[0020] Further, adjusting the relative positions of the light screen and the target lens component in the target direction includes:

[0021] Obtain the set focal length of the target lens component;

[0022] Determine the target movement range of the light screen and the target lens component in the target direction according to the set focal length;

[0023] Adjust the relative positions of the light screen and the target lens component in the target direction within the target movement range.

[0024] Further, adjusting the relative positions of the light screen and the target lens component in the target direction includes:

[0025] Adjust the position of the light screen in the target direction according to the first preset step length and the first movement direction;

[0026] Adjust the position of the target lens component in the target direction according to the first preset step length and the first movement direction so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens component and the light-emitting surface of the screen of the target screen component, and the second distance refers to the shortest distance between the theoretical center of the lens and the photosensitive surface of the light screen.

[0027] Further, adjusting the relative positions of the light screen and the target lens assembly in the target direction includes:

[0028] Adjusting the position of the target lens assembly in the target direction according to the second preset step length and the second moving direction;

[0029] Adjusting the position of the light screen in the target direction according to the second preset step length and the second moving direction so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly and the light-emitting surface of the target screen assembly, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen.

[0030] Further, bonding the target lens assembly and the target screen assembly. After bonding, the object distance between the target lens assembly and the target screen assembly is the target object distance, and obtaining the target optical engine includes:

[0031] Applying glue to the target lens assembly and / or the target screen assembly;

[0032] Adjusting the position of the target lens assembly in the target direction so that the shortest distance between the target lens assembly and the target screen assembly is the target object distance;

[0033] Bonding and curing the target lens assembly and the target screen assembly through the glue applied to the target lens assembly and / or the target screen assembly to obtain the target optical engine.

[0034] In a second aspect, the present application provides an optical engine assembly device, and the device includes:

[0035] An initial state control module, configured to respectively clamp and control the fixed-focus camera module, the light screen, the target lens assembly, and the target screen assembly to be arranged in sequence in the target direction and maintain a preset state;

[0036] An image monitoring module, configured to control the fixed-focus camera module to monitor the actual image on the light screen. The actual image is the real image collected by the target lens assembly from the target screen assembly and presented on the light screen;

[0037] A position adjustment module, configured to adjust the relative positions of the light screen and the target lens assembly in the target direction until the actual image becomes an equal-sized and inverted target image corresponding to the target screen assembly;

[0038] A distance monitoring module, configured to detect the target distance between any two of the light screen, the target lens assembly, and the target screen assembly when the target image is presented on the light screen;

[0039] An object distance determination module, configured to determine the target object distance of the target lens assembly according to the target distance and the preset target image distance corresponding to the target lens assembly;

[0040] An optical engine assembly module is used to bond a target lens assembly and a target screen assembly. The object distance between the bonded target lens assembly and the target screen assembly is the target object distance, and a target optical engine is obtained.

[0041] In a third aspect, the present application provides an electronic device, including:

[0042] A processor;

[0043] A memory for storing instructions executable by the processor;

[0044] Wherein, the processor is configured to execute to implement an optical engine assembly method provided in the first aspect.

[0045] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute to implement an optical engine assembly method provided in the first aspect.

[0046] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0047] In this embodiment, in a preset state where the fixed-focus camera module, the light screen, the target lens assembly, and the target screen assembly are clamped and arranged in sequence in the target direction, the actual image on the light screen is monitored by the fixed-focus camera module, and the relative positions of the light screen and the target lens assembly in the target direction are adjusted based on the feedback of the actual image, thereby changing the actual image. Finally, an equal-sized and inverted target image corresponding to the target screen assembly is obtained. Then, the target object distance of the target lens assembly is determined according to the target distance between any two of the light screen, the target lens assembly, and the target screen assembly in the current state; the target lens assembly and the target screen assembly are bonded, and the object distance between the bonded target lens assembly and the target screen assembly is the target object distance, and a target optical engine is obtained. It can be seen that this embodiment avoids using an expensive human-eye camera to assist in assembling the optical engine device, but uses a conventional fixed-focus camera module to achieve the purpose of optical engine focusing, reducing the optical engine assembly cost; it also avoids using the contrast focusing method to assist in assembling the optical engine device, increasing the distance between the lens assembly and the screen assembly during the focusing process, avoiding the possibility of collision between the lens assembly and the screen assembly, and reducing the probability of the lens assembly and the screen assembly being scrapped due to collision, further reducing the assembly cost. In addition, the ultimate goal of this embodiment is to monitor an equal-sized and inverted real image on the light screen. Therefore, during the assembly process, the space occupied by each component is smaller, and thus the space utilization rate can be improved. More devices can be installed in the space to assemble multiple optical engines simultaneously, improving the installation efficiency. Description of the Drawings

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0049] Figure 1 Schematic diagram of the process of assembling an optical engine using a human eye camera;

[0050] Figure 2 Schematic diagram of the process of obtaining an optical engine by assembling with a human eye camera;

[0051] Figure 3 Schematic flowchart of an optical engine assembly method provided in this embodiment;

[0052] Figure 4 Schematic diagram of the structure in which a fixed-focus camera module, a light screen, a target lens assembly, and a target screen assembly are arranged in sequence in the target direction provided in this embodiment;

[0053] Figure 5 Schematic diagram of the initial distribution of a fixed-focus camera module, a light screen, a target lens assembly, and a target screen assembly provided in this embodiment;

[0054] Figure 6 Schematic diagram of another initial distribution of a fixed-focus camera module, a light screen, a target lens assembly, and a target screen assembly provided in this embodiment;

[0055] Figure 7 Schematic diagram of the distribution after obtaining a target image by a fixed-focus camera module, a light screen, a target lens assembly, and a target screen assembly provided in this embodiment;

[0056] Figure 8 Schematic diagram of the adhered structure of the target lens assembly and the target screen assembly provided in this embodiment;

[0057] Figure 9 Schematic diagram of the structure of an optical engine assembly device provided in this embodiment;

[0058] Figure 10 Schematic diagram of the structure of an electronic device provided in this embodiment.

[0059] Reference numerals:

[0060] A - Human eye camera, B - Lens assembly, C - Lens clamping jig, D - Screen assembly, E - Screen assembly jig, F - Glue;

[0061] 1 - Fixed - focus camera module, 2 - Light screen, 3 - Light - screen assembly jig, 4 - Target lens assembly, 5 - Lens clamping jig, 6 - Target screen assembly, 7 - Screen assembly jig, 8 - Glue. Detailed implementation manners

[0062] In an embodiment of the present application, by providing an optical - machine assembly method, the technical problem in the prior art that an eye - camera needs to be used for optical - machine assembly, resulting in a high assembly cost, is solved.

[0063] The technical solution of the embodiment of the present application for solving the above - mentioned technical problem has the following general idea:

[0064] In this embodiment, in a preset state where the fixed - focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 are clamped and arranged in sequence according to the target direction, the fixed - focus camera module 1 monitors the actual image on the light screen 2. Based on the feedback of the actual image, the relative positions of the light screen 2 and the target lens assembly 4 in the target direction are adjusted, thereby changing the actual image. Finally, an upright target image of the same size as the target screen assembly 6 is obtained. Then, according to the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 in the current state, the target object distance of the target lens assembly 4 is determined; the target lens assembly 4 and the target screen assembly 6 are bonded, and the object distance between the bonded target lens assembly 4 and the target screen assembly 6 is the target object distance, and a target optical machine is obtained. It can be seen that this embodiment avoids using an expensive eye - camera to assist in assembling the optical - machine device, but uses a conventional fixed - focus camera module 1 to achieve the purpose of optical - machine focusing, reducing the optical - machine assembly cost; it also avoids using the method of contrast focusing to assist in assembling the optical - machine device, increasing the distance between the lens assembly and the screen assembly during the focusing process, avoiding the possibility of collision between the lens assembly and the screen assembly, and reducing the probability that the lens assembly and the screen assembly become waste due to collision, further reducing the assembly cost. In addition, the ultimate goal of this embodiment is to monitor an upright real image of the same size on the light screen 2. Therefore, during the assembly process, the space occupied by each component is smaller, and thus the space utilization rate can be improved. More devices can be installed in the space to assemble multiple optical machines simultaneously, improving the installation efficiency.

[0065] To better understand the above - mentioned technical solution, the above - mentioned technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0066] First, it should be noted that the term "and / or" appearing in this article is only a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the front - and - rear associated objects.

[0067] The optical engine is an optical component used to observe the projection screen in virtual reality devices and is an important component affecting the size and quality of VR devices. With the development of the industry, in order to improve the imaging brightness and resolution of virtual reality devices, the optical engine has started to use OLED screens, and the number of lenses used is gradually increasing, resulting in the inability of conventional positioning and assembly solutions to meet the assembly accuracy requirements.

[0068] In related technologies, AA (Active Alignment) assembly can improve assembly accuracy, but it requires the use of a human eye camera A, which is expensive, resulting in an increase in assembly costs.

[0069] The human eye camera A is an imaging device that mimics the structure and function of the human eye. The human eye camera A uses a spherical lens and a retina structure similar to the human eye, has a high dynamic range, fast focusing, and a wide field of view, can quickly adjust the focal length like the human eye, capture details in both bright and dark areas at the same time, and provide a field of view close to that of the human eye, aiming to achieve visual perception similar to that of the human eye. However, the manufacturing and calibration of the human eye camera A are difficult, and the R & D and production costs are expensive.

[0070] During the AA assembly process, a human eye camera A, a lens assembly B, a screen assembly D, a lens clamping jig C, and a screen assembly jig E can be used, as specifically shown in Figure 1 the figure. During the AA assembly process, the relative distance between the human eye camera A and the lens assembly B is fixed. That is to say, during the entire assembly process, the distance between the human eye camera A and the lens assembly B remains unchanged. Then, the human eye camera A is used to automatically focus according to the principle of virtual image formation of a convex lens. Among them, the principle of virtual image formation of a convex lens can specifically refer to

[0071] Equation 1.

[0072]

[0073] Among them, f 1 is the focal length of the lens assembly B, u 1 is the object distance corresponding to the lens assembly B, and v 1 is the image distance corresponding to the lens assembly B.

[0074] The human eye camera A can obtain f 1 during the focusing process. v 1 can be determined according to the actual needs of the engineer for the optical engine to be assembled currently. Therefore, in the case of knowing f 1 and v 1 , based on the above Equation 1, the object distance u 1 corresponding to the lens assembly B can be obtained. After determining the object distance u 1 corresponding to the lens assembly B, the screen assembly D can be moved upward, as shown inFigure 2 As shown, while ensuring that the object distance between the lens assembly B and the screen assembly D is u 1 the lens assembly B and the screen assembly D are bonded with glue F to obtain the assembled optical engine after assembly.

[0075] However, during the AA assembly process, due to manufacturing tolerances in the lens assembly B and the screen assembly D in the optical engine, it is necessary to find the best focus point through contrast focusing to complete the assembly. However, during the contrast focusing process, it is necessary to find the peak in the resolution curve to determine the best focus point. To find the peak, it is necessary to continue to reduce the distance between the lens assembly B and the screen assembly D after passing through the best focus point to determine that the currently appearing best focus point is the peak. At this time, the distance between the lens assembly B and the screen assembly D is too close, resulting in easy collision between the lens assembly B and the screen assembly D. As a result, the lens assembly B and the screen assembly D are easily identified as defective materials, leading to rejection and high production costs.

[0076] To solve the above problems, this embodiment provides an optical engine assembly method as shown in Figure 3 which includes steps S31 - S36.

[0077] Step S31: Clamp and control the fixed - focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 to be arranged in sequence in the target direction and maintain a preset state;

[0078] Step S32: Control the fixed - focus camera module 1 to monitor the actual image on the light screen 2. The actual image is the real image collected by the target lens assembly 4 for the target screen assembly 6 and presented on the light screen 2;

[0079] Step S33: Adjust the relative positions of the light screen 2 and the target lens assembly 4 in the target direction until the actual image becomes an equal - sized and inverted target image corresponding to the target screen assembly 6;

[0080] Step S34: Detect the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 when the target image is presented on the light screen 2;

[0081] Step S35: Determine the target object distance of the target lens assembly 4 according to the target distance and the pre - set target image distance corresponding to the target lens assembly 4;

[0082] Step S36: Bond the target lens assembly 4 and the target screen assembly 6. The object distance between the bonded target lens assembly 4 and the target screen assembly 6 is the target object distance to obtain the target optical engine. That is, the target lens assembly 4 and the target screen assembly 6 are overlapped and bonded, and the object distance between the bonded target lens assembly 4 and the target screen assembly 6 is the target object distance to obtain the target optical engine.

[0083] A method for assembling an optical engine provided in this embodiment can be executed by an optical engine automatic assembly device or by a host computer for controlling the actions of the optical engine automatic assembly device. Specifically, it can be set according to the actual situation, and this embodiment will not elaborate on this.

[0084] Regarding step S31, the fixed-focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 are respectively clamped and controlled to be arranged in sequence in the target direction and maintained in a preset state.

[0085] The clamping device can be selected according to the actual situation, and the target direction can be different according to different clamping devices. For example, as Figure 4 shown, for a certain clamping device, the corresponding target direction can be the vertical direction. This embodiment only takes the Figure 4 shown clamping device and target direction as an example to illustrate the solution provided in this embodiment.

[0086] As Figure 4 shown, first, the fixed-focus camera module 1 and the target screen assembly 6 are respectively clamped and fixed at their corresponding preset positions to form the target direction. Among them, the fixed-focus camera module 1 is clamped and fixed at the topmost position, and the target screen assembly 6 is clamped and fixed at the lowermost position by the screen assembly jig 7. The fixed-focus camera module 1 and the target screen assembly 6 are in the vertical direction, and the target direction is the vertical direction. It should be noted that the clamping positions of the fixed-focus camera module 1 and the target screen assembly 6 can also be exchanged with each other. This embodiment only takes the fixed-focus camera module 1 being above and the target screen assembly 6 being below as an example for illustration.

[0087] After clamping and fixing the fixed-focus camera module 1 and the target screen assembly 6, the light screen 2 can be clamped by the light screen assembly jig 3, and the target lens assembly 4 can be clamped by the lens clamping jig 5. Among them, the light screen 2 and the target lens assembly 4 are arranged in sequence in the target direction in the area between the fixed-focus camera module 1 and the target screen assembly 6. The light screen 2 needs to be adjacent to the fixed-focus camera module 1, and the target lens assembly 4 needs to be adjacent to the target screen assembly 6. That is to say, the fixed-focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 are arranged in sequence from top to bottom in the vertical direction.

[0088] Among them, in Figure 4 a three-dimensional coordinate system is established, the vertical direction is defined as the Z direction, and any horizontal plane is defined as the XOY plane. The screen assembly jig 7 includes at least 5 degrees of freedom in the X direction, Y direction, X rotation, Y rotation, and Z rotation. The light screen assembly jig 3 includes at least the degree of freedom of moving in the Z direction. The lens clamping jig 5 includes at least 3 degrees of freedom in the Z direction, X rotation, and Y rotation.

[0089] The preset state includes at least three states:

[0090] State 1: The light screen 2 is always within the shooting range of the fixed-focus camera module 1.

[0091] The fixed-focus camera module 1 is a camera module with a fixed focal length. The light screen 2 needs to always be within the range where the fixed-focus camera module 1 can form a clear image. During the subsequent moving and adjusting process mentioned in this embodiment, it also needs to satisfy the state of always being within the range where the fixed-focus camera module 1 can form a clear image.

[0092] State 2: The target screen assembly 6 is always within the shooting range of the target lens assembly 4.

[0093] The target lens assembly 4 is used to shoot the target screen assembly 6 and form an image on the light screen 2. Therefore, during the subsequent moving and adjusting process mentioned in this embodiment, it also needs to satisfy the state that the target screen assembly 6 is always within the shooting range of the target lens assembly 4.

[0094] State 3: The target lens assembly 4 always forms an image on the light screen 2.

[0095] The image of the target screen assembly 6 captured by the target lens assembly 4 needs to be reflected on the light screen 2.

[0096] Based on the aforementioned States 1, 2, and 3, it can be known that the target lens assembly 4 is used to shoot the target screen assembly 6, the light screen 2 is used to present the image formed by the target lens assembly 4 shooting the target screen assembly 6, and the fixed-focus camera module 1 is used to monitor the image presented on the light screen 2. In a better state, the optical axis of the fixed-focus camera module 1, the light-sensitive surface of the light screen of the light screen 2, the theoretical center of the lens of the target lens assembly 4 (i.e., the theoretical optical center), and the light-emitting surface of the screen of the target screen assembly 6 can be on the same straight line, and this straight line is the axial direction where the target direction is located.

[0097] Regarding step S32, control the fixed-focus camera module 1 to monitor the actual image on the light screen 2. The actual image is the real image captured by the target lens assembly 4 for the target screen assembly 6 and presented on the light screen 2.

[0098] Control the fixed-focus camera module 1 to monitor the actual image on the light screen 2. Whenever the target lens assembly 4 moves once, the actual image will be updated once, and the imaging position of the actual image will also change. At this time, the light screen 2 can be moved to receive the changed actual image.

[0099] Detect the actual size of the actual image obtained each time of monitoring, and then compare the actual size with the screen size of the target screen assembly 6.

[0100] When the actual size is different from the screen size of the target screen assembly 6, perform the step of adjusting the relative positions of the light screen 2 and the target lens assembly 4 in the target direction, that is, perform step S33.

[0101] When the actual size is the same as the screen size of the target screen component 6 and the actual image is in the opposite direction to that of the target screen component 6, perform the step of detecting the target distance between any two of the light screen 2, the target lens component 4, and the target screen component 6 when the target image is presented on the detection light screen 2, that is, perform step S34.

[0102] The target lens component 4 in this embodiment can be equivalent to a convex lens. Therefore, the imaging principle of the target lens component 4 conforms to the imaging principle of a convex lens. Therefore, when the object distance between the target screen component 6 and the target lens component 4 is equal to twice the focal length of the target lens component 4, the image formed by the target lens component 4 is an equal-sized and inverted image corresponding to the target lens component 4. Then, the actual focal length of the target lens component 4 is determined, and then the target lens component 4 and the target screen component 6 are assembled based on the actual focal length to obtain the target optical engine.

[0103] In order to obtain the actual focal length of the target lens component 4, it is necessary to first make the image formed by the target lens component 4 of the target screen component 6 an equal-sized and inverted image, and its implementation method can perform step S33.

[0104] Regarding step S33, adjust the relative positions of the light screen 2 and the target lens component 4 in the target direction until the actual image becomes an equal-sized and inverted target image corresponding to the target screen component 6.

[0105] Each type of lens component has a set focal length corresponding to it during the R & D process, that is, the focal length that the engineer wants the lens component to present. However, during the production process of the lens component, due to other factors such as production technology, there may be a certain difference between the actual focal length of the lens component and the set focal length. Therefore, it is necessary to adopt the solution provided in this embodiment to determine the actual focal length of the target lens component 4.

[0106] In this embodiment, in order to determine the actual focal length of the target lens component 4, it is necessary to move and adjust the positions of the light screen 2 and the target lens component 4 in the target direction to obtain an equal-sized and inverted image, and the moving range of the light screen 2 and the target lens component 4 in the target direction can be determined according to the set focal length of the target lens component 4.

[0107] Specifically, first obtain the set focal length of the target lens component 4; then determine the target moving range of the light screen 2 and the target lens component 4 in the target direction according to the set focal length, and then adjust the relative positions of the light screen 2 and the target lens component 4 in the target direction within the target moving range.

[0108] The actual focal length of the target lens assembly 4 is usually within a certain range near the set focal length. When the object distance between the target screen assembly 6 and the target lens assembly 4 is equal to twice the focal length of the target lens assembly 4, an equal-sized and inverted image can be obtained. Combining these two points, the range near twice the set focal length can be used as the target movement range. For example, when the set focal length is 10 cm, the difference between the set focal length and the actual focal length is usually within 1 cm. Then the corresponding range of the actual focal length is 10 ± 1 cm, and the corresponding range of twice the focal length is 20 ± 2 cm. Then the target movement range can be 18 cm - 22 cm. That is to say, the shortest distance range between the target lens assembly 4 and the target screen assembly 6 during the movement of the target lens assembly 4 should be 18 cm - 22 cm. The shortest distance range between the target lens assembly 4 and the light screen 2 during the movement of the target lens assembly 4 can be determined according to 18 cm - 22 cm and the imaging principle of the convex lens.

[0109] During the process of moving the target lens assembly 4 and the light screen 2, the movements of the target lens assembly 4 and the light screen 2 correspond to each other. The light screen 2 can be moved first, and then the target lens assembly 4 follows the movement characteristics of the light screen 2 to move (denoted as Method 1), or the target lens assembly 4 can be moved first, and then the light screen 2 follows the movement characteristics of the target lens assembly 4 to move (denoted as Method 2). Of course, in addition to Method 1 and Method 2, the target lens assembly 4 and the light screen 2 can also be moved simultaneously in the same direction according to different step lengths (denoted as Method 3).

[0110]

Method 1: Move the light screen 2 first, and then move the target lens assembly 4

[0111] Adjust the position of the light screen 2 in the target direction according to the first preset step length and the first movement direction; adjust the position of the target lens assembly 4 in the target direction according to the first preset step length and the first movement direction, so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen 2.

[0112] For example, the target movement range of the target lens assembly 4 is 18 cm - 22 cm, and the first preset step length is 0.1 cm, that is, the target lens assembly 4 moves 0.1 cm each time. When the target lens assembly 4 moves from 18 cm to 22 cm, the corresponding first movement direction should be Figure 4 upward in; when the target lens assembly 4 moves from 22 cm to 18 cm, the corresponding first movement direction should be Figure 4 downward in.

[0113] In this embodiment, an example will be described first with the target lens assembly 4 moving from 22 cm to 18 cm (i.e., moving downward). Figure 5The shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6 is 22 cm. It should be noted that at this time, the second distance between the theoretical center of the lens of the target lens assembly 4 and the photosensitive surface of the light screen can be 22 cm or not, and can be specifically selected according to the actual situation. The clearest image plane corresponding to the position of 22 cm should be Figure 5 the position indicated by the theoretical image plane in Figure 5 The image formed on the light screen 2 in

[0114] is not an equal-sized and inverted target image. Figure 5 Therefore, the target lens assembly 4 can be moved downward by a first preset step of 0.1 cm, and at the same time, the light screen 2 is also moved downward so that the first distance between the theoretical center of the lens and the light-emitting surface of the screen is equal to the second distance between the theoretical center of the lens and the photosensitive surface of the light screen. At this time, Figure 7 the theoretical image plane in

[0115] will descend, but of course the image formed on the light screen 2 is not an equal-sized and inverted target image, so it continues to move downward until the image formed on the light screen 2 is an equal-sized and inverted target image. For example, the state shown in Figure 6 Figure 6 Figure 6 can be obtained. The shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6 in

[0116] is 18 cm. It should be noted that at this time, the second distance between the theoretical center of the lens of the target lens assembly 4 and the photosensitive surface of the light screen can be 18 cm or not, and can be specifically selected according to the actual situation. The clearest image plane corresponding to the position of 18 cm should be Figure 6 the position indicated by the theoretical image plane in Figure 7 The image formed on the light screen 2 in

[0117] is not an equal-sized and inverted target image.

Method 2: First move the target lens assembly 4, and then move the light screen 2

[0118] Adjust the position of the target lens assembly 4 in the target direction according to the second preset step length and the second moving direction; adjust the position of the light screen 2 in the target direction according to the second preset step length and the second moving direction, so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6, and the second distance refers to the shortest distance between the theoretical center of the lens and the photosensitive surface of the light screen 2.

[0119] The principle of Method 2 is similar to that of Method 1. The difference between Method 1 and Method 2 lies in the exchange of the order of adjustment and movement of the target lens assembly 4 and the light screen 2. For specific details, reference can be made to the relevant description of Method 1, which will not be elaborated in this embodiment. The second preset step length and the first preset step length may be the same or different.

[0120]

Method 3: Move the target lens assembly 4 and the light screen 2 simultaneously in the same direction with different step lengths

[0121] The principle of Method 3 is similar to that of Method 1. The difference between Method 1 and Method 3 lies in the simultaneous adjustment of the target lens assembly 4 and the light screen 2. For specific details, reference can be made to the relevant description of Method 1, which will not be elaborated in this embodiment.

[0122] Regarding step S34, detect the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 when the target image is presented on the light screen 2.

[0123] In Figure 7 the state shown, the first distance u1 is equal to the second distance v2, and an equal-sized inverted target image corresponding to the target screen assembly 6 is presented on the light screen 2. In this state, monitor the target distance between any two of the photosensitive surface of the light screen, the theoretical center of the lens, and the light-emitting surface of the screen. That is to say, the target distance can be the first distance, the second distance, or the sum of the first distance and the second distance. At this time, the first distance represents the object distance, and the second distance represents the image distance.

[0124] Regarding step S35, determine the target object distance of the target lens assembly 4 according to the target distance and the preset target image distance corresponding to the target lens assembly 4.

[0125] The preset target image distance can be determined according to the actual needs of the engineer for the current optical machine to be assembled.

[0126] According to the target distance and the principle that an equal-sized inverted image can be obtained at twice the focal length in a convex lens, the actual focal length of the target lens assembly 4 can be determined. When the target distance is the image distance or the object distance, then half of the image distance or the object distance is the actual focal length. When the target distance is the sum of the image distance and the object distance, then one-fourth of the target distance is the actual focal length.

[0127] Based on the actual focal length and the preset target image distance, determine the target object distance of the target lens assembly 4. Specifically, according to the target distance and the relationship among the focal length, object distance, and image distance in a convex lens, the target object distance corresponding to the target image distance can be determined. Specifically, reference can be made to Formula 2.

[0128]

[0129] Among them, f 2 is the focal length of the convex lens, u 2 is the object distance corresponding to the convex lens, and v 2 is the image distance corresponding to the convex lens. Given f 2 and v 2 , the corresponding u 2 can be obtained. That is to say, when the object distance between the target lens assembly 4 and the target screen assembly 6 is u 2 , the image distance of this optical engine to be assembled can be ensured to be v 2 .

[0130] Regarding step S36, bond the target lens assembly 4 and the target screen assembly 6. After bonding, the object distance between the target lens assembly 4 and the target screen assembly 6 is the target object distance, and the target optical engine is obtained.

[0131] Apply glue on the target lens assembly 4 and / or the target screen assembly 6. Adjust the position of the target lens assembly 4 in the target direction so that the shortest distance between the target lens assembly 4 and the target screen assembly 6 is the target object distance. Bond and cure the target lens assembly 4 and the target screen assembly 6 through the glue 8 applied on the target lens assembly 4 and / or the target screen assembly 6 to obtain the target optical engine.

[0132] As Figure 8 shown, move the target lens assembly 4 shown by the dotted line downward to the position of the target lens assembly 4 shown by the solid line so that the shortest distance between the target lens assembly 4 and the target screen assembly 6 is the target object distance u. Use the glue 8 to bond the target lens assembly 4 and the target screen assembly 6 and cure the glue 8 to obtain the target optical engine with the target image distance. That is to say, overlap and merge the target lens assembly 4 and the target screen assembly 6 for bonding. After bonding, the object distance between the target lens assembly 4 and the target screen assembly 6 is the target object distance, and the target optical engine is obtained. As Figure 8 shown, bond the target lens assembly 4 and the target screen assembly 6 after overlapping them vertically and horizontally to obtain the target optical engine.

[0133] It should be noted that the object distance between the bonded target lens assembly 4 and the target screen assembly 6 being the target object distance means that the shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the screen of the target screen assembly 6 is the target object distance.

[0134] In summary, in the preset state where the fixed-focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 are clamped and arranged in sequence according to the target direction, the fixed-focus camera module 1 monitors the actual image on the light screen 2, and based on the feedback of the actual image, adjusts the relative positions of the light screen 2 and the target lens assembly 4 in the target direction, thereby changing the actual image, and finally obtaining an equal-sized and inverted target image corresponding to the target screen assembly 6. Furthermore, according to the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 in the current state, the object distance of the target lens assembly 4 is determined; the target lens assembly 4 and the target screen assembly 6 are bonded, and the object distance between the bonded target lens assembly 4 and the target screen assembly 6 is the target object distance, thus obtaining the target optical engine. It can be seen that this embodiment avoids using an expensive human eye camera to assist in assembling the optical engine device, but uses a conventional fixed-focus camera module 1 to achieve the purpose of optical engine focusing, reducing the optical engine assembly cost; it also avoids using the contrast focusing method to assist in assembling the optical engine device, increasing the distance between the lens assembly and the screen assembly during the focusing process, avoiding the possibility of collision between the lens assembly and the screen assembly, and reducing the probability of the lens assembly and the screen assembly being scrapped due to collision, further reducing the assembly cost. In addition, the ultimate goal of this embodiment is to monitor an equal-sized and inverted real image on the light screen 2. Therefore, during the assembly process, the space occupied by each component is smaller, and thus the space utilization rate can be improved, and more devices can be installed in the space to assemble multiple optical engines simultaneously, improving the installation efficiency.

[0135] Based on the same inventive concept, this embodiment provides a kind of optical engine assembly device as Figure 9 shown, and the device includes:

[0136] An initial state control module 91, configured to respectively clamp and control the fixed-focus camera module 1, the light screen 2, the target lens assembly 4, and the target screen assembly 6 to be arranged in sequence according to the target direction and maintain the preset state;

[0137] An image monitoring module 92, configured to control the fixed-focus camera module 1 to monitor the actual image on the light screen 2, and the actual image is the real image collected by the target lens assembly 4 for the target screen assembly 6 and presented on the light screen 2;

[0138] A position adjustment module 93, configured to adjust the relative positions of the light screen 2 and the target lens assembly 4 in the target direction until the actual image becomes an equal-sized and inverted target image corresponding to the target screen assembly 6;

[0139] A distance monitoring module 94, configured to detect the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 when the target image is presented on the light screen 2;

[0140] An object distance determination module 95, configured to determine an object distance of the target lens assembly 4 according to a target distance and a preset target image distance corresponding to the target lens assembly 4;

[0141] An optical engine assembly module 96, configured to bond the target lens assembly 4 and the target screen assembly 6, and the object distance between the bonded target lens assembly 4 and the target screen assembly 6 is the target object distance, so as to obtain a target optical engine.

[0142] Further, an initial state control module 91 is configured to:

[0143] Clamp and fix the fixed-focus imaging module 1 and the target screen assembly 6 at respectively corresponding preset positions to form a target direction;

[0144] Clamp the light screen 2 and the target lens assembly 4, and arrange them in sequence along the target direction in the area between the fixed-focus imaging module 1 and the target screen assembly 6;

[0145] The preset state includes that the light screen 2 is always within the shooting range of the fixed-focus imaging module 1, the target screen assembly 6 is always within the shooting range of the target lens assembly 4, and the target lens assembly 4 always forms an image on the light screen 2.

[0146] Further, an image monitoring module 92 is configured to:

[0147] Control the fixed-focus imaging module 1 to monitor the actual image on the light screen 2;

[0148] Detect the actual size of the actual image;

[0149] When the actual size is different from the screen size of the target screen assembly 6, perform the step of adjusting the relative positions of the light screen 2 and the target lens assembly 4 in the target direction;

[0150] When the actual size is the same as the screen size of the target screen assembly 6 and the actual image is in the opposite direction to the target screen assembly 6, perform the step of detecting the target distance between any two of the light screen 2, the target lens assembly 4, and the target screen assembly 6 when the target image is presented on the light screen 2.

[0151] Further, a position adjustment module 93 is configured to:

[0152] Obtain the set focal length of the target lens assembly 4;

[0153] Determine the target movement range of the light screen 2 and the target lens assembly 4 in the target direction according to the set focal length;

[0154] Adjust the relative positions of the light screen 2 and the target lens assembly 4 in the target direction within the target movement range.

[0155] Further, a position adjustment module 93 is configured to:

[0156] Adjust the position of the light screen 2 in the target direction according to the first preset step size and the first moving direction;

[0157] Adjust the position of the target lens assembly 4 in the target direction according to the first preset step size and the first moving direction, so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen 2.

[0158] Further, the position adjustment module 93 is used for:

[0159] Adjust the position of the target lens assembly 4 in the target direction according to the second preset step size and the second moving direction;

[0160] Adjust the position of the light screen 2 in the target direction according to the second preset step size and the second moving direction, so that the first distance is equal to the second distance. The first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly 4 and the light-emitting surface of the target screen assembly 6, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen 2.

[0161] Further, the optical machine assembly module 96 is used for:

[0162] Apply glue on the target lens assembly 4 and / or the target screen assembly 6;

[0163] Adjust the position of the target lens assembly 4 in the target direction so that the shortest distance between the target lens assembly 4 and the target screen assembly 6 is the target object distance;

[0164] Bond and cure the target lens assembly 4 and the target screen assembly 6 through the glue 8 applied on the target lens assembly 4 and / or the target screen assembly 6 to obtain the target optical machine.

[0165] Based on the same inventive concept, this embodiment provides an electronic device as shown in Figure 10 shown, including:

[0166] A processor 101;

[0167] A memory 102 for storing executable instructions of the processor 101;

[0168] Wherein, the processor 101 is configured to execute to implement an optical machine assembly method as provided above.

[0169] Based on the same inventive concept, this embodiment provides a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by the processor 101 of the electronic device, the electronic device can execute a method for assembling an optical machine as provided above.

[0170] Since the electronic device introduced in this embodiment is the electronic device used to implement the information processing method in the embodiments of the present application, based on the information processing method introduced in the embodiments of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiments of the present application will not be described in detail here. As long as the electronic device used by those skilled in the art to implement the information processing method in the embodiments of the present application belongs to the scope protected by the present application.

[0171] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0172] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified function in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0173] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified function in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0174] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the functions specified in one process or a plurality of processes and / or boxes Figure 1 one process or a plurality of processes and / or boxes Figure 1 steps for implementing the functions specified in one box or a plurality of boxes.

[0175] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to cover the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0176] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An optical-mechanical assembly method, characterized in that: The method comprises: Clamp and control the fixed-focus camera module, the light screen, the target lens assembly and the target screen assembly to be arranged in sequence according to the target direction and maintain a preset state respectively; Controlling the fixed-focus camera module to monitor the actual image on the light screen, wherein the actual image is a real image captured by the target lens assembly on the target screen assembly and presented on the light screen; Adjusting the relative positions of the light screen and the target lens assembly in the target direction until the actual image becomes an inverted target image of the same size as that corresponding to the target screen assembly; Detecting a target distance between any two of the light screen, the target lens assembly, and the target screen assembly when the target image is presented on the light screen; Determining a target object distance of the target lens assembly according to the target distance and a preset target image distance corresponding to the target lens assembly; The target lens assembly and the target screen assembly are bonded, and the object distance between the target lens assembly and the target screen assembly after bonding is the target object distance, thereby obtaining a target optical machine.

2. The method according to claim 1, characterized in that The method of respectively clamping and controlling the fixed-focus camera module, the light screen, the target lens assembly and the target screen assembly to be arranged in sequence according to the target direction and to maintain a preset state includes: The fixed-focus camera module and the target screen assembly are clamped and fixed at corresponding preset positions respectively to form the target direction; Clamping the light screen and the target lens assembly, and sequentially arranging them in the area between the fixed-focus camera module and the target screen assembly along the target direction; The preset state includes that the light screen is always within the shooting range of the fixed-focus camera module, the target screen assembly is always within the shooting range of the target lens assembly, and the target lens assembly is always imaged on the light screen.

3. The method according to claim 1, characterized in that The controlling the fixed-focus camera module to monitor the actual image on the light screen includes: Controlling the fixed-focus camera module to monitor the actual image on the light screen; detecting an actual size of the actual image; When the actual size is different from the screen size of the target screen assembly, performing the step of adjusting the relative positions of the light screen and the target lens assembly in the target direction; When the actual size is the same as the screen size of the target screen assembly, and the actual image is in opposite directions to the target screen assembly, a step of detecting a target distance between any two of the light screen, the target lens assembly, and the target screen assembly when the target image is presented on the light screen is performed.

4. The method according to claim 1, characterized in that The step of adjusting the relative positions of the light screen and the target lens assembly in the target direction comprises: Obtaining a set focal length of the target lens assembly; Determining a target movement range of the light screen and the target lens assembly in the target direction according to the set focal length; The relative positions of the light screen and the target lens assembly in the target direction are adjusted within the target movement range.

5. The method according to claim 1 or 4, characterized in that The step of adjusting the relative positions of the light screen and the target lens assembly in the target direction comprises: Adjusting the position of the light screen in the target direction according to a first preset step length and a first moving direction; The position of the target lens assembly in the target direction is adjusted according to the first preset step size and the first moving direction so that the first distance is equal to the second distance, the first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly and the screen luminous surface of the target screen assembly, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen.

6. The method according to claim 1 or 4, characterized in that: The step of adjusting the relative positions of the light screen and the target lens assembly in the target direction comprises: adjusting the position of the target lens assembly in the target direction according to a second preset step length and a second moving direction; The position of the light screen in the target direction is adjusted according to the second preset step size and the second moving direction so that the first distance is equal to the second distance, the first distance refers to the shortest distance between the theoretical center of the lens of the target lens assembly and the screen luminous surface of the target screen assembly, and the second distance refers to the shortest distance between the theoretical center of the lens and the light-sensitive surface of the light screen.

7. The method according to claim 1, characterized in that The target lens assembly and the target screen assembly are bonded, and the object distance between the target lens assembly and the target screen assembly after bonding is the target object distance, and a target optical machine is obtained, comprising: Dispensing glue on the target lens assembly and / or the target screen assembly; Adjusting the position of the target lens assembly in the target direction so that the shortest distance between the target lens assembly and the target screen assembly is the target object distance; The target lens assembly and the target screen assembly are bonded and cured by glue dispensed on the target lens assembly and / or the target screen assembly to obtain the target optical machine.

8. An optical-mechanical assembly device, characterized in that: The device comprises: An initial state control module is used to respectively clamp and control the fixed-focus camera module, the light screen, the target lens assembly and the target screen assembly to be arranged in sequence according to the target direction and maintain a preset state; An image monitoring module, used for controlling the fixed-focus camera module to monitor an actual image on the light screen, wherein the actual image is a real image captured by the target lens assembly on the target screen assembly and presented on the light screen; A position adjustment module, used for adjusting the relative positions of the light screen and the target lens assembly in the target direction until the actual image becomes an inverted target image of the same size corresponding to the target screen assembly; a distance monitoring module, used for detecting a target distance between any two of the light screen, the target lens assembly and the target screen assembly when the target image is presented on the light screen; An object distance determination module, used to determine a target object distance of the target lens assembly according to the target distance and a preset target image distance corresponding to the target lens assembly; The optical machine assembly module is used to bond the target lens assembly and the target screen assembly, and the object distance between the target lens assembly and the target screen assembly after bonding is the target object distance, so as to obtain a target optical machine.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute to implement an optical-mechanical assembly method as claimed in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to implement an optical-mechanical assembly method as described in any one of claims 1 to 7.

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