An optical flat mounting and adjusting system and method in an optical module

Abstract

The present invention provides an optical flat mounting and adjusting system and method in an optical module. The system includes an optical positioning component, a limiting mechanism, a standard part, and an adjusting mechanism. By obtaining the angular offset data of the optical flat relative to a preset posture, the adjusting mechanism is used to adjust the posture of the optical flat according to the angular offset obtained by the optical positioning component, so as to fix the optical flat on the bracket relative to the first reference of the limiting mechanism in the preset posture. The present invention uses the standard part as a reference to position the preset posture of the optical flat, which can compensate for the processing errors of the bracket itself; by obtaining the angular deviation, the mounting and adjusting errors caused by the processing errors of the tooling itself can be eliminated; by monitoring the mounting and adjusting process and the curing process of the optical flat in real time, the risks affecting the accuracy in the mounting and adjusting process or the curing process can be identified in time, and adjusted or repaired in time to avoid rework, so as to accurately fix the optical flat in the preset posture; the mounting and adjusting system is simple to operate, stable and reliable, and meets the mass production requirements.

Description

Technical Field

[0001] The present invention relates to the alignment technology of optical elements, and particularly to an alignment system and method for an optical flat in an optical module. Background Art

[0002] Modern computer technology, display technology, sensor technology and other scientific and technological advancements have promoted the development of AR (Augmented Reality) and VR (Virtual Reality) experience systems. The VR scene creates a virtual information environment in a multi-dimensional information space, enabling users to have an immersive sense of presence and perfect interaction capabilities with the environment. The AR scene applies virtual information to the real world, where the real environment and the virtual environment are superimposed in real time on the same screen or space and coexist.

[0003] Currently, in the AR and VR industries, the alignment and detection processes and tools for optical module products are not perfect. Usually, jigs are used to assist in positioning and assembling. Whether the alignment is in place mainly depends on the experience and subjective feelings of the operators, and it is impossible to quantitatively detect the alignment accuracy. Moreover, the accuracy differences caused by deformation and wear during the tooling process cannot be evaluated, resulting in poor product stability and consistency. The current methods are not suitable for large-scale mass production.

[0004] Take Figure 1 the AR optical module shown as an example. As Figure 1 shown, the main components of this optical module include an optical arc piece 01, an optical flat 02, and a display device 03. Among them, the optical flat 02, as a beam splitter with reflection and transmission functions, the accuracy of its fixed angle α (i.e., the included angle between the optical flat 02 and the reference plane 04) relative to the reference plane 04 affects the image quality observed by the human eye. The same problem exists in the alignment of optical flats in other optical modules. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides an alignment system for an optical flat in an optical module. This system precisely fixes the optical flat relative to the first reference in a preset posture. The system can monitor the alignment and curing processes of the optical flat in real time, promptly identify the risks affecting the accuracy during the alignment process or the curing process, and promptly adjust or repair to avoid rework, thereby achieving the precise fixation of the optical flat and providing technical support for the mass production of optical modules.

[0006] The above object of the present invention is achieved by the following technical solutions:

[0007] An alignment system for an optical flat in an optical module, used to fix the optical flat in the optical module relative to the first reference in a preset posture on a bracket (06). The system at least includes:

[0008] An optical positioning component (1), which is in a first predetermined posture relative to a first reference and enables the light emitted by the optical positioning component to fall on the optical flat plate, is used to obtain the angular offset information of the optical flat plate relative to a preset posture. The optical positioning component in the first predetermined posture can only rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component; and

[0009] A limiting mechanism is used to limit the posture of the bracket (06) so that the bracket (06) is in a second predetermined posture relative to the optical positioning component (1).

[0010] In the optical flat plate alignment system of the above optical module, the second predetermined posture refers to a posture where the bracket cannot rotate, or a posture where the bracket can rotate around an axis parallel to the optical axis of the optical positioning component.

[0011] Optionally, in the optical flat plate alignment system of the above optical module, the first reference includes a cylinder or a cone, the limiting mechanism includes the first reference, and the first predetermined posture is the posture when the optical axis of the optical positioning component (1) coincides with or is parallel to the axis of the cylinder or the cone.

[0012] Optionally, in the optical flat plate alignment system of the above optical module, the first reference includes a plane, the limiting mechanism includes the first reference cooperating with the bracket (06) and a limiting member to enable the bracket (06) to be in the second predetermined posture; the first predetermined posture means that the included angle between the optical axis of the optical positioning component and the first reference is consistent with the parameters of the predetermined posture.

[0013] Optionally, in the optical flat plate alignment system of the above optical module, the included angle between the optical axis of the optical positioning component and the first reference is 30 - 60 degrees.

[0014] Optionally, in the optical flat plate alignment system of the above optical module, the optical positioning component (1) includes a collimator (11).

[0015] Furthermore, in the optical flat plate alignment system of the above optical module, the optical positioning component (1) further includes a collimator fixing base (12) for adjusting the posture of the collimator (11), and the collimator (11) is fixed on the top of the collimator fixing base (12);

[0016] Alternatively, the optical positioning component (1) further includes a collimator fixing base (12) and a locking mechanism (13) for adjusting the posture of the collimator (11), and the collimator (11) is locked with the top of the collimator fixing base (12) through the locking mechanism (13).

[0017] Further, the alignment system for the optical flat in the above optical module further includes an adjustment mechanism (3) for adjusting the attitude of the optical flat (02) according to the angle offset information obtained by the optical positioning component (1).

[0018] Further, in the alignment system for the optical flat in the above optical module, the adjustment mechanism (3) includes an operating cantilever (31) and an adjustment platform (32) capable of driving the operating cantilever (31) to rotate and translate. A structure for detachably fixing the optical flat (02) is provided at the end of the operating cantilever (31).

[0019] Further, the alignment system for the optical flat in the above optical module further includes a standard part (4). The standard part (4) has a second reference that mates with the first reference and a standard surface (41) that is in a preset attitude relative to the second reference.

[0020] Further, the alignment system for the optical flat in the above optical module further includes a third reference (21) for cooperating with the standard part (4) such that the optical axis of the optical positioning component (1) is perpendicular to the standard surface (41) of the standard part (4).

[0021] Optionally, in the alignment system for the optical flat in the above optical module, the mating relationship between the second reference of the standard part and the third reference is to be in contact with the third reference.

[0022] Further, in the alignment system for the optical flat in the above optical module, the optical positioning component can simultaneously measure the angle offset of the standard surface of the standard part and the optical flat.

[0023] Optionally, in the alignment system for the optical flat in the above optical module, the mating relationship between the bracket (06) and the first reference is that a part of the bracket is in contact with the first reference.

[0024] Further, the alignment system for the optical flat in the above optical module further includes a fitting degree confirmation component for confirming whether the second reference of the standard part (4) is in contact with the third reference (21) or whether the bracket (06) is in contact with the first reference.

[0025] The present invention also provides an alignment method for the optical flat in an optical module. This method uses the above optical flat alignment system for operation and includes the following steps:

[0026] Install the bracket to the limiting mechanism of the alignment system;

[0027] Fix the optical flat to the bracket;

[0028] Use the optical positioning component of the alignment system to obtain the angle offset information of the optical flat relative to the preset attitude.

[0029] The above method further includes:

[0030] Before fixing the optical flat to the bracket, adjusting the attitude of the optical flat according to the angle offset information so that the angle offset information is less than a preset value.

[0031] In the above method, the first reference of the alignment system includes a cylinder or a cone, and the limiting mechanism includes the first reference. Wherein, the installation of the bracket to the limiting mechanism of the alignment system includes:

[0032] Engaging the cylindrical hole on the bracket that matches the cylinder with the cylinder. The cylindrical hole on the bracket is configured such that after engagement, the bracket can only rotate around the axis of the cylinder or translate along the axis; or

[0033] Engaging the conical hole on the bracket that matches the cone with the cone. The conical hole on the bracket is configured such that after engagement, the bracket can only rotate around the axis of the cone.

[0034] In the above method, the first reference of the alignment system includes a plane, and the limiting mechanism includes the first reference and a limiting member that cooperate with the bracket (06). Wherein, the installation of the bracket to the limiting mechanism of the alignment system includes:

[0035] Fitting the part on the bracket that matches the plane to the plane;

[0036] Installing the bracket (06) using the limiting member. The bracket has a component that matches the limiting member such that when the bracket is installed, it cannot rotate or can only rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component.

[0037] In the above method, the obtaining of the angle offset information of the optical flat relative to the preset attitude by using the optical positioning component (1) of the alignment system includes:

[0038] The optical positioning component (1) emits measurement light to the optical flat;

[0039] The optical positioning component (1) receives the reflected light and determines the information indicating the angle between the reflected light and the measurement light. The reflected light is formed by the reflection of the measurement light on the optical flat;

[0040] Determining the angle offset information of the optical flat relative to the preset attitude according to the obtained angle and the preset reference angle, where the preset reference angle is pre-calibrated using a standard part.

[0041] In the above method, the obtaining of the angular deviation information of the optical flat relative to the preset attitude by using the optical positioning component of the alignment system includes:

[0042] Configure the standard part of the alignment system so that the standard surface of the standard part is perpendicular to the optical axis of the optical positioning component, and the light emitted by the optical positioning component can fall on the optical flat and the standard surface of the standard part;

[0043] The optical positioning component emits measurement light to the optical flat and the standard part;

[0044] The optical positioning component receives the reflected light of the optical flat and the reflected light of the standard part, and respectively determines the information indicating the angle between the reflected light of the optical flat and the measurement light and the angle between the reflected light of the standard part and the measurement light. The reflected light of the optical flat and the reflected light of the standard part are formed by the reflection of the measurement light on the optical flat and the standard surface of the standard part respectively;

[0045] Determine the angular deviation information of the optical flat relative to the preset attitude according to the angle between the reflected light of the optical flat and the measurement light and the angle between the reflected light of the standard part and the measurement light.

[0046] In the above method, the fixing of the optical flat to the bracket includes:

[0047] Fix the optical flat to the bracket by means of dispensing.

[0048] In the above method, the dispensing positions are symmetric with respect to the geometric center of the optical lens.

[0049] In the above method, the glue used in the dispensing method is at least one of UV glue, low shrinkage resin quick-drying glue, hot melt glue or two-component glue.

[0050] Adopting the above solution, the present invention has the following technical effects: The alignment system of the present invention uses an optical positioning component and a limit mechanism to cooperate to quantitatively detect the alignment accuracy, which helps to improve the stability and consistency of the product; using the standard part as a reference to position the optical flat can compensate for the processing error of the bracket itself; by obtaining the angle deviation amounts (Δm, Δn), the alignment error caused by the processing error of the tooling of the alignment system itself can be eliminated, further reducing the accuracy requirements of the tooling itself and reducing the processing cost; by real-time monitoring the alignment process and curing process of the optical flat, the risks affecting the accuracy in the alignment process or curing process can be identified in time, adjusted or repaired in time to avoid rework, so as to accurately fix the optical flat relative to the first reference according to the preset attitude. This alignment system is simple to operate, stable and reliable, and meets the mass production requirements. Description of the Drawings

[0051] Figure 1 It is a schematic diagram of the imaging structure of the optical module used in AR glasses;

[0052] Figure 2A is a structural schematic diagram of an embodiment when the first reference is a column;

[0053] Figure 2B is a schematic diagram of the coordination between the bracket and the limiting mechanism when the first reference is a plane;

[0054] Figure 3 It is a schematic structural diagram of an embodiment of a standard part;

[0055] Figure 4A , Figure 4B is a schematic diagram of the degree of fit of the fitting surface;

[0056] Figure 5A is an example of an image of a display panel where the optical positioning assembly detects the angular offset of the optical plate;

[0057] Figure 5B An example of an image of a display panel where the optical positioning assembly simultaneously detects the angular offset of the optical plate and the standard.

[0058] The reference numerals in the figure are as follows:

[0059] 01-optical arc film, 02-optical flat film, 03-display device, 04-reference plane, 05-normal plane, 06-bracket;

[0060] 1-optical positioning assembly, 11-collimator, 12-collimator fixing seat, 13-locking mechanism;

[0061] 2-limiting mechanism, 21-first reference, 22-limiting member;

[0062] 3-adjusting mechanism, 31-operating cantilever, 32-adjusting platform;

[0063] 4-standard part, 41-inclined surface, 42-second reference;

[0064] 5-camera; 6-processor; 7-UV lamp; 8-third reference; 9-base. DETAILED DESCRIPTION

[0065] In view of the problems that the existing optical plate adjustment tools in optical modules cannot quantitatively detect the adjustment accuracy, the accuracy difference caused by deformation and wear in the tooling process cannot be evaluated, resulting in poor product stability and consistency, the present invention provides an optical plate adjustment system and method in an optical module. The adjustment system adopts an optical positioning component (such as a collimator or an interferometer, etc.) and a limit mechanism to quantitatively detect the adjustment accuracy, which helps to improve the stability and consistency of the product; by real-time monitoring the adjustment process and the curing process of the optical plate, the angular deviation between the posture of the optical plate and the preset posture and the risk of affecting the accuracy in the curing process are timely identified, and the adjustment or repair is timely made through the adjustment mechanism to avoid rework, so that the optical plate is accurately fixed at the preset angle.

[0066] It should be noted that the design requirements mentioned in the present invention mainly include plane flatness, angle accuracy, parallelism, etc. that meet the preset numerical range. The numerical ranges required for different application scenarios are not the same. The specific numerical range is not limited below, but it at least includes the relevant accuracy that can be achieved by ordinary similar products at present; the first datum mentioned in this application is the reference datum preset by the assembly and adjustment system of this application, which can be a plane or a three-dimensional structure. The second datum and the third datum are reference datums that have a certain positional relationship with the first datum, generally a plane. The second datum and the third datum mentioned in this application are planes. The preset posture mentioned in this application mainly refers to the matching relationship and relative position relationship between the optical plate and the first datum. For different first datum shapes and assembly positions, the parameters of the preset posture of the optical plate are not the same. For example, if the first datum is a plane, the preset posture parameters of the optical plate are the angle between the optical plate and the first datum (that is, the preset angle β) and the angle between the normal of the optical plate and the entrance pupil optical axis of the optical module (refer to Figure 2B , the limiting member 22 can limit the angle). Obviously, for different first reference shapes and assembly positions, the first preset posture and the second preset posture parameters are also different.

[0067] The following is a detailed description of the system and method for assembling and adjusting the optical plate in the optical module of the present invention in conjunction with the accompanying drawings and examples.

[0068] system

[0069] The present invention provides an optical plate assembly and adjustment system in an optical module. The system accurately fixes the optical plate relative to a first reference in a preset posture. The system can monitor the assembly and adjustment process and the curing process of the optical plate in real time, timely identify the risks that affect the accuracy during the assembly and adjustment process or the curing process, and timely adjust or repair to avoid rework, thereby achieving accurate fixing of the optical plate. Figure 1Taking the optical module commonly used in AR glasses shown in the figure as an example, the system structure of the present invention and the specific installation and adjustment process of the optical plate are described. Of course, the application of the present invention is not limited to the optical module of this structure. It is also easy to make local structural changes to the installation and adjustment system of the present invention and apply it to optical modules of other structures.

[0070] like Figure 1 As shown, in one embodiment, the optical module includes:

[0071] The optical arc sheet 01 is an aspheric concave mirror with reflection and transmission functions, and a normal surface 05 is formed along the top surface of the concave surface. The human eye is located on the normal surface 05. The reflection surface of the optical arc sheet 01 can be a concave surface and is located on the side close to the human eye.

[0072] Optical plate 02 is a beam splitter with reflection and transmission functions, which is located in front of the human eye.

[0073] The display device 03 is arranged parallel to the reference plane 04 of the optical module, and the reflective surface of the optical flat plate 02 faces the display device 03 and the optical arc plate 01 .

[0074] The optical module projects the light emitted by the display device 03 onto the optical plate 02 serving as a beam splitter. The optical plate 02 reflects a portion of the light, and the reflected light is projected onto the inner side of the concave surface of the optical arc plate 01, and then reflects and passes through the optical plate 02 to form an image in the human eye. At the same time, external light can pass through the optical arc plate 01 and the optical plate 02 to enter the human eye, so that the user wearing the AR glasses can see the physical objects in the real world and the virtual images generated by the display device 03 at the same time, realizing the function of augmented reality.

[0075] Obviously, the optical arc sheet 01, the optical flat sheet 02 and the display device 03 need to satisfy a certain spatial position relationship to achieve the above functions. In one embodiment, the spatial position relationship is guaranteed by the bracket 06. In this case, the bracket 06 is pre-designed to have a reference or a component that cooperates with the reference, so that the optical arc sheet 01, the optical flat sheet 02 and the display device 03 can be attached to the bracket 06 in a predetermined posture relative to the reference. In this way, the spatial position relationship between the optical arc sheet 01, the optical flat sheet 02 and the display device 03 is determined. In the context of this application, unless otherwise specified, the term "posture" is used to simultaneously define the six degrees of freedom parameters of the object's spatial position, inclination, rotation angle, orientation, etc. In other words, the posture of object A relative to the reference object uniquely defines the position and orientation relationship between object A and the reference object in three-dimensional space.

[0076] In one embodiment, the reference may include a plane, in which case the angle between the optical plate 02 and the reference or the reference plane 04 of the optical module that is bonded to the reference (i.e., the fixed angle of the optical plate 02) is equal to a preset angle β, which is determined by the design of the optical system and affects the imaging quality such as optical distortion clarity. Please note that in the context of the present application, the reference may be on a bracket or on an adjustment device that has a matching component with the bracket. In the following, for the purpose of clarity, the reference is described as being located on the adjustment device. Please note that the reference plane 04 of the aforementioned optical module may be a plane on the bracket or a non-planar portion of the bracket (e.g., only two arms or rods), as long as the portion can be bonded to the plane included in the reference to define the spatial position of the bracket.

[0077] In the above example process, the accuracy of the angle α between the optical plate 02 and the reference plane 04 of the optical module (i.e., the fixed angle of the optical plate 02 relative to the reference plane 04) affects the quality of light transmission and human eye imaging. If the fixed angle α of the optical plate 02 deviates from the theoretical design value, it may be combined with the errors of other components (such as the optical arc plate 01 and the display device 03) to cause imaging distortion (such as trapezoidal distortion), and at the same time affect the imaging clarity and reduce the imaging quality. If the consistency of the installation and adjustment cannot be guaranteed, it will also reduce the alignment yield of the subsequent binocular adjustment of the AR glasses.

[0078] The process of assembling the optical plate 02 is an important step in the optical module assembly process. In one embodiment, the optical arc plate 01 and the optical plate 02 are fixed on a bracket 06 (refer to Figure 2A ), the bracket 06 may be a columnar frame structure with a triangular cross section, and the reference plane 04 may be set on a side frame of the bracket 06. In one embodiment, the optical arc sheet 01 is fixed on the bracket 06 relative to the reference plane 04; the optical flat sheet 02 is fixed on the bracket 06 in a preset posture; and the display device 03 is installed on the side of the bracket 06 where the reference plane 04 is located.

[0079] Figure 2A FIG. 1 is a structural example of an optical plate assembly system in an optical module of the present invention. Figure 2A As shown, the optical plate assembly system in the optical module at least includes an optical positioning component 1 and a limiting mechanism 2, and the limiting mechanism 2 is used to position the bracket 06. Figure 2B In the embodiment shown, the limiting mechanism 2 includes a first reference 21 and a limiting member 22. The first reference 21 is a plane that matches the bracket 06. The plane on the bracket that matches the first reference 21 can be, for example, Figure 1 The reference surface 04 is shown. In one embodiment, the first reference 21 can be set on a base 9 or a platform.

[0080] exist Figure 2A In one embodiment, the optical positioning component 1 is in a first predetermined posture relative to the first reference 21, and the light emitted by the optical positioning component can fall on the optical flat plate. In one embodiment, the first predetermined posture refers to a posture in which the angle between the optical axis of the optical positioning component 1 and the plane or straight line included in the first reference 21 is a known posture. In this case, it is obvious that the optical positioning component in the first predetermined posture is fixed or can rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component. In one embodiment, the first predetermined posture refers to the angle between the optical axis of the optical positioning component 1 and the first reference 21 and the parameters of the preset posture (that is, the angle between the optical axis and the plane where the first reference 21 is located is consistent with the preset angle β). In one embodiment, the stopper 22 cooperates with the first reference 21 to position the bracket 06 so that the bracket 06 is in a second preset posture. The second preset posture refers to a posture in which the bracket 06 cannot rotate relative to the optical axis of the optical positioning component 1 or can rotate around an axis parallel to the optical axis of the optical positioning component.

[0081] In one embodiment, the limit member 22 is one or more screws or the like that are not perpendicular to the plane included in the first reference, or is one or more screws or the like that are perpendicular to the plane included in the first reference, and cooperates with the pre-configured holes on the bracket 06 to prevent the bracket from rotating.

[0082] In one embodiment, the stopper 22 is a column included in the first reference, which is engaged with a pre-configured cylindrical hole on the bracket 06 so that after engagement, the bracket can only rotate around the axis of the column or translate along the axis. In one embodiment, the stopper 22 is a cone included in the first reference, which is engaged with a pre-configured conical hole on the bracket 06 so that after engagement, the bracket can only rotate around the axis of the cone.

[0083] exist Figure 2A In one embodiment shown, the optical positioning assembly 1 includes a collimator mounting seat 12 and a collimator 11 disposed on the collimator mounting seat 12. In one embodiment, the optical positioning assembly 1 also includes a locking mechanism 13 for locking the collimator 11 on the collimator mounting seat 12. The collimator 11 can be fixed to the top of the collimator mounting seat 12 by the locking mechanism 13, and is used to accurately position the optical plate 02 relative to the first reference. In one embodiment, the locking mechanism 13 has the function of adjusting the horizontal angle and the pitch angle, and can adjust the horizontal angle and the pitch angle of the collimator 11 and lock the collimator 11 with the top of the collimator mounting seat 12, so as to prevent the accuracy error caused by the position movement of the collimator 11 during the installation and adjustment process.

[0084] In another embodiment of the optical positioning assembly 1 , the optical positioning assembly 1 includes a collimator mounting seat 12 and a collimator 11 fixed on the collimator mounting seat 12 , and the collimator mounting seat 12 can adjust the pitch angle and horizontal distance of the collimator 11 .

[0085] Optionally, the adjustment system further includes an adjustment mechanism 3 , which can adjust the position of the optical plate 02 according to the angular offset of the optical plate 02 obtained by the optical positioning component 1 .

[0086] In one embodiment, the adjustment mechanism 3 includes an adjustment platform 32 and an operating arm 31 connected to the adjustment platform 32. The operating arm 31 is a rod with a telescopic function, and a structure for fixing the optical plate 02 is provided at its end, for example, a bonding platform or an adsorption buckle for bonding or adsorbing the optical plate 02. The adjustment platform 32 has a rotation driving mechanism in at least two dimensions, that is, it rotates around the length direction of the optical plate 02 and around the width direction of the optical plate 02. In another embodiment, the adjustment platform 32 has a driving mechanism in five dimensions, namely, front and back, left and right, vertical, pitch, and rotation, and can achieve adjustment of the optical plate 02 in five dimensions, namely, front and back, left and right, height, pitch angle, and azimuth angle.

[0087] The above embodiments are only structural examples of the optical plate installation and adjustment system in the optical module of the present invention. For example, the installation positions of the optical positioning component 1 and the adjustment mechanism 3 are not limited to the limiting mechanism 2, and can also be installed at other positions as long as the corresponding operating effects can be achieved.

[0088] In one embodiment, the adjustment system further includes a high-precision standard component 4, such as Figure 3 As shown, the standard part 4 is provided with a second reference 42 matched with the first reference 21 and a standard surface 41 in a preset posture relative to the second reference 42. In one embodiment, the standard part 4 is provided with a standard stopper assembly matched with the stopper mechanism 2 of the adjustment system, so that the stopper mechanism 2 of the adjustment system can stop the standard part 4, and when being stopped, the posture of the standard surface of the standard part 4 relative to the first reference 21 is consistent with the preset posture of the optical plate relative to the first reference 21 that meets the design requirements. In one embodiment, the standard stopper assembly on the standard part 4 is consistent with the component matched with the first reference 21 on the bracket 06. In one embodiment, the first reference 21 includes a plane, then the matching relationship between the second reference 42 and the first reference 21 is a parallel setting relationship, the angle between the standard surface 41 and the second reference 42 is consistent with the parameter of the preset posture (i.e., the preset angle β), and the angle between the normal of the standard surface 41 and the optical axis of the optical module is also consistent with the parameter of the preset posture. Optionally, the shape of the standard part 4 is the same as the shape of the bracket 06, the size is proportional, and the accuracy meets the design requirements.

[0089] Optionally, the first datum 21 of the limiting mechanism 2 is set on a base 9 for cooperating with the bracket 06; the adjustment system is also provided with a third datum 8 for cooperating with the standard part 4. In this embodiment, the first datum 21 is a plane, and the first datum 21 fits tightly with the upper surface of the base 9. The second datum 42 and the third datum 8 of the standard part 4 are both planes parallel to the first datum 21. The second datum 42 fits tightly with the third datum 8, and makes the optical axis of the optical positioning component 1 perpendicular to the standard surface 41 of the standard part 4.

[0090] In this embodiment, the second datum 42 of the standard part 4 has a datum surface with the same design accuracy as the first datum 21 of the limit mechanism 2. Due to the influence of factors such as processing error, assembly error, and empirical randomness of processing operations, the bracket 06 cannot guarantee that the angle offset of the frame on the side where the optical plate is installed in the bracket 06 relative to the first datum 21 and the preset posture meets the design requirements, and thus cannot guarantee that the installation posture of the optical plate 02 meets the design requirements, which reduces the product yield of the optical module to a certain extent. In one embodiment, in order to prevent the standard part 4 from causing errors due to unstable states such as sliding or tipping during the adjustment process, the center of gravity of the standard part 4 should be close to the fitting surface of the second datum 42 and the third datum 8.

[0091] During the installation and adjustment process of this embodiment, the pitch angle and horizontal position of the collimator 11 need to be adjusted through the locking mechanism 13 to ensure that the optical axis of the collimator 11 is perpendicular to the standard surface 41 of the standard component 4 (the imaging point of the collimator 11 is located at the center coordinate origin of its display panel) or the angle between the optical axis of the collimator 11 and the first reference 21 is consistent with the parameters of the predetermined posture. By reading the angle offset information of the optical plate 02 detected by the collimator 11 (that is, the angle offset information relative to the limiting mechanism 2 or the standard component 4), it is determined whether the installation position and the fixing angle of the optical plate 02 meet the design requirements. If not, the adjustment mechanism 3 is adjusted until the optical plate 02 meets the design requirements, and then the optical plate 02 is cured on the bracket 06. In order to prevent the optical plate 02 from offsetting and generating errors during the curing process, the angle offset information detected by the collimator 11 is monitored at the same time. If it exceeds the required error range, it is necessary to make timely adjustments.

[0092] Optionally, the adjustment system is further provided with a fit confirmation component for confirming whether the second datum 42 of the standard part 4 and the third datum 8 or the bracket 06 and the first datum 21 of the limiting mechanism 2 fit together.

[0093] In one embodiment, the fit confirmation assembly includes at least one camera 5, which is arranged at one end of the first reference 21 or the third reference 8 (refer to FIG. 2 ) or movably arranged on either side of the first reference 21 or the third reference 8. The purpose of setting the camera 5 is to confirm whether the second reference 42 of the standard part 4 and the third reference 8 or the bracket 06 and the first reference 21 are tightly fitted.

[0094] During the adjustment process of this embodiment, the image captured by the camera 5 can be used to confirm whether the second reference 42 of the standard part 4 and the third reference 8 or the bracket 06 and the first reference 21 are in place. For example, the camera 5 can be movably arranged on one side of the first reference 21 or the third reference 8. If they are in place, Figure 4A As shown, the second datum 42 of the standard part 4 and the third datum 8 or the fitting surface of the bracket 06 and the first datum 21 overlap into a line (there is no gap between the two); if they are not fitted in place, such as Figure 4B As shown, there is a gap between the fitting surfaces of the second datum 42 and the third datum 8 or the bracket 06 and the first datum 21 of the standard part 4. At this time, it is necessary to check and wipe the surface of the first datum 21 or the third datum 8 to ensure its flatness, and press the standard part 4 or the bracket 06 to make the second datum 42 and the third datum 8 or the bracket 06 and the first datum 21 fully fit together, and take an image again through the camera 5 until the requirements are met; if the flatness requirements cannot be met, it may be that the processing flatness of the standard part 4 or the bracket 06 is not enough or deformation has occurred, and the standard part 4 or the bracket 06 needs to be replaced.

[0095] In addition, when the camera 5 is movably arranged on one side of the first reference 21 or the third reference 8, a movable light source can be arranged on the opposite side of the camera 5, and the image outside the fitting surface of the second reference 42 of the standard part 4 and the third reference 8 or the bracket 06 and the first reference 21 is used as the reference image. If the brightness contrast of the image at the fitting surface of the second reference 42 of the standard part 4 and the third reference 8 or the bracket 06 and the first reference 21 and the brightness contrast of the reference image is less than the contrast preset value (for example, considering the influence of ambient light, the contrast preset value is 50:1, 100:1 , 150:1, etc.) (i.e., no light is transmitted through the bonding surface, the brightness value of the image at the bonding surface taken by the camera 5 is low, and the contrast relative to the reference image is low), it indicates that the bonding surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the bracket 06 and the first datum 21 are properly bonded; otherwise, it indicates that the bonding surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the bracket 06 and the first datum 21 are not properly bonded (i.e., light is transmitted through the bonding surface, the brightness value of the image at the bonding surface taken by the camera 5 is high, and the contrast relative to the reference image is high).

[0096] In another embodiment, when the camera 5 is movably set on one side of the first datum 21 or the third datum 8, a light source is set on the opposite side of the camera 5, and a processor 6 is used to extract the contrast between the brightness of the image at the bonding surface of the second datum 42 of the standard part 4 and the third datum 8 or the bracket 06 and the first datum 21 and the brightness of the image of the adjacent area of ​​the bonding surface. If the contrast is greater than the preset contrast value, it indicates that there is no complete bonding; if the contrast is less than the preset contrast value, it indicates that the bonding surface is completely bonded.

[0097] The installation position of the camera 5 mentioned in the above embodiment is only an example and is not limited thereto, as long as the shooting requirements are met.

[0098] Optionally, the fit confirmation component is an airtight component, for example, by setting a through hole on the first datum 21 or the third datum 8, placing a precision gas flow meter under the through hole, and detecting the gas flow at the through hole after a certain air pressure is applied to the through hole, to confirm whether the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the bracket 06 and the first datum 21 are in place.

[0099] Optionally, the data output interfaces of the collimator 11 and / or the camera 5 are connected to the processor 6, and the camera 5 transmits the captured images of the bonding surfaces of the second datum 42 and the third datum 8 of the standard part 4 or the bracket 06 and the first datum 21 to the processor 6 for display, which is helpful for the operator to observe and judge; during the adjustment process, the angular offset information of the standard part 4 and the optical plate 02 detected by the collimator 11 is stored in the memory of the processor 6 and displayed in real time after being processed (refer to Figure 5A and 5B ), which is convenient for operators to judge and timely adjust the position and angle of the optical plate 02, and helps to improve work efficiency.

[0100] Optionally, the processor 6 processes and analyzes the detection data and / or images in real time, and converts the processing results into any one or more forms of text, graphics, icons, and voice prompts, saving the operator's observation and conversion time and further improving work efficiency.

[0101] Optionally, the drive mechanism of the adjustment mechanism 3 is electrically connected to the processor 6 , and the processor 6 generates a control instruction according to the acquired angular offset information of the optical plate 02 , and sends it to the drive mechanism of the adjustment mechanism 3 to control the adjustment mechanism 3 to adjust the position of the optical plate 02 .

[0102] Optionally, the adjustment system is equipped with a UV lamp 7. In one embodiment, the UV lamp 7 is disposed on one side or both sides of the limiting mechanism 02; in one embodiment, in the stage of fixing the optical flat sheet 02, the optical flat sheet 02 is fixed by dispensing glue; in one embodiment, the dispensing glue position is symmetrical with respect to the geometric center of the optical lens. In one embodiment, the optical flat sheet 02 is fixed by dispensing glue using at least one of UV glue, low shrinkage resin quick-drying glue, hot melt glue or two-component glue. In the embodiment using UV glue, a UV lamp can be used to irradiate the part of the optical flat sheet 02 that needs to be bonded, and the optical flat sheet 02 is fixed on the bracket 06 to reduce the curing time. In one embodiment, the UV lamps on both sides of the limiting mechanism 02 are used to cure both sides of the optical flat sheet 02 at the same time to reduce deformation and avoid the influence on the angle and position of the optical flat sheet 02 caused by the curing shrinkage of the glue. During the UV curing process, the collimator 11 is used to monitor the angular offset of the optical plate 02 relative to the preset posture in real time. Once the angular offset accuracy of the optical plate 02 exceeds the allowable range, it should be repaired and adjusted in time to avoid rework or defective products, achieve efficient assembly and adjustment, improve work efficiency, and facilitate mass production.

[0103] Optionally, the fixation of the optical flat skin 02 is not limited to the above-mentioned gluing method, and can also be fixed by mechanical fixing methods, such as snap-fitting method, thread and gasket combination fixing, etc.

[0104] Based on the above-mentioned system for assembling and adjusting an optical plate in an optical module, one or more embodiments of the present application further provide a method for assembling and adjusting an optical plate in an optical module.

[0105] In one embodiment, the adjustment process of the optical plate 02 specifically includes the following steps (the units of the following measurement values ​​of the collimator 11 vary according to the selected collimator model, and the corresponding coordinate system also varies. The general unit is minute, that is, 1′=(1 / 60)°):

[0106] Step S100, installing the bracket 06 to the limiting mechanism of the adjustment system.

[0107] Step S300, fixing the optical plate on the bracket 06, wherein the optical plate can be fixed on the bracket 06 by gluing, mechanical fixing, etc.

[0108] Step S400, using the optical positioning assembly 1 of the adjustment system to obtain the angular offset information of the optical plate relative to the preset posture. In one embodiment, the angular offset information of the optical plate relative to the preset posture is the angular offset (m, n) of the optical plate relative to the preset posture. In one embodiment, the angular offset information of the optical plate relative to the preset posture is information indicating the angular offset (m, n) of the optical plate relative to the preset posture.

[0109] In one embodiment, the angular displacement information of the optical plate relative to the preset posture is displayed as the angular difference between the measuring light emitted by the optical positioning component and the reflected light or information indicating the angular difference between the measuring light emitted by the optical positioning component and the reflected light. Here, the reflected light is formed by the measuring light reflecting on the optical plate. In one embodiment, the angular displacement information of the optical plate relative to the preset posture is displayed as the angular difference between the measuring light emitted by the optical positioning component and the reflected light or information indicating the angular difference between the measuring light emitted by the optical positioning component and the reflected light. Here, the reflected light is formed by the measuring light reflecting on the optical plate.

[0110] In one embodiment, step 400 specifically includes:

[0111] Step S410: the optical positioning assembly 1 is in a first predetermined posture relative to the first reference 21 of the limiting mechanism 2 and enables the light emitted by the optical positioning assembly to fall on the optical plate.

[0112] In one embodiment, the angle between the optical axis of the optical positioning component 1 in the first predetermined posture and the first datum 21 (when the first datum 21 is a plane) is consistent with the parameters of the predetermined posture (preset angle β), or the optical axis of the optical positioning component 1 coincides with or is parallel to the axis of the first datum 21 (when the first datum 21 is a cylinder or a cone).

[0113] There are multiple ways to make the optical positioning assembly 1 be in the first predetermined posture relative to the limiting mechanism 2 as follows.

[0114] In one embodiment, when the first datum 21 is a plane, the second datum 42 of the standard part 4 is parallel to the first datum 21, for example, the second datum 42 of the standard part 4 is fitted with the first datum 21. A fixed standard part using a limit mechanism is used. The optical positioning component is used to calibrate the information indicating the reference angle of the standard surface of the standard part relative to the first datum. At this time, the optical positioning component is in the first predetermined position.

[0115] In one embodiment, when the first datum 21 is a plane, the second datum 42 of the standard part 4 is parallel to the first datum 21, for example, the second datum 42 of the standard part 4 is fitted with the first datum 21; and the standard part is fixed by a limit mechanism. The position of the optical positioning component 1 is adjusted so that its optical axis is perpendicular to the standard surface 41 of the standard part 4, and the optical positioning component 1 is in a first predetermined posture.

[0116] In one embodiment, when the first reference 21 is a cylinder or a cone, the position of the optical positioning component 1 is adjusted so that its optical axis coincides with or is parallel to the axis of the cylinder or cone, and the optical positioning component 1 is in a first predetermined posture. In this case, the optical positioning component 1 is used to obtain information indicating a reference angle, and the aforementioned reference angle refers to the angle of the standard surface of the standard part fixed by the limiting mechanism relative to the axis of the cylinder or cone of the first reference.

[0117] Step S420: the limiting mechanism 2 limits the bracket 06 to a second predetermined posture.

[0118] In one embodiment, the first datum of the adjustment system includes a cylinder, and the limiting mechanism includes the first datum. In this case, the cylindrical hole on the bracket that matches the cylinder is engaged with the cylinder, and the cylindrical hole on the bracket is configured so that after engagement, the bracket can only rotate around the axis of the cylinder or translate along the axis. In one embodiment, the first datum of the adjustment system includes a cone, and the limiting mechanism includes the first datum. In this case, the conical hole on the bracket that matches the cone is engaged with the cone, and the conical hole on the bracket is configured so that after engagement, the bracket can only rotate around the axis of the cone.

[0119] The execution order of the above steps S410 and S420 can be interchanged. When step S410 is executed first, the cylindrical hole or conical hole of the bracket matching the first reference can be a through hole or a blind hole; if step S420 is executed first, the cylindrical hole or conical hole of the bracket matching the first reference is a through hole, so as to facilitate the positioning of the optical positioning component 1.

[0120] In one embodiment, the first reference of the adjustment system includes a plane, and the limiting mechanism includes a first reference and a limiting member that match the bracket 06. In this case, the portion of the bracket that matches the plane is fitted with the plane included in the first reference, the limiting member fixes the bracket, and the bracket has a component that matches the limiting member so that the bracket cannot rotate when fixed or can only rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component.

[0121] Step S430, the optical positioning component 1 obtains the angle offset information (m, n).

[0122] In one embodiment, an optical positioning assembly is used to emit measuring light to the optical plate, and reflected light is received. The optical positioning assembly or other equipment known in the art is used to determine information indicating the angle between the reflected light and the measuring light, where the reflected light is formed by the measuring light reflecting on the optical plate. Further, based on the aforementioned angle and a preset reference angle, the angular offset information of the optical plate relative to a preset posture is determined, wherein the preset reference angle is the reference angle calibrated using the standard parts described above. In one embodiment, the information indicating the angle between the reflected light and the measuring light is embodied as the distance or positional relationship between the position of the light spot of the reflected light displayed by the display component of the optical positioning assembly 1 (e.g., a collimator) and the pre-configured position of the measuring light (e.g., the origin on some display interface with a scale) (see Figure 5A , 5B ).

[0123] In one embodiment, the standard component 4 of the adjustment system is configured so that the standard surface 41 of the standard component is perpendicular to the optical axis of the optical positioning component 1, and the light emitted by the optical positioning component 1 can fall on the standard surfaces of the optical plate and the standard component. Then, the optical positioning component 1 is used to emit measurement light to the optical plate and the standard component 4, and receive the reflected light of the optical plate and the reflected light of the standard surface of the standard component. The information indicating the angle between the reflected light of the optical plate and the measurement light and the angle between the reflected light of the standard component and the measurement light are determined respectively, and the reflected light of the optical plate and the reflected light of the standard component are formed by the reflection of the measurement light on the standard surfaces of the optical plate and the standard component respectively. According to the angle between the reflected light of the optical plate and the measurement light and the angle between the reflected light of the standard component and the measurement light, the angle offset information of the optical plate relative to the preset posture is determined. In one embodiment, the information indicating the angles between the reflected light of the optical plate and the reflected light of the standard component and the measuring light is embodied as the position of the light spot of the reflected light of the optical plate and the distance or positional relationship between the reflected light of the standard component and the pre-configured position of the measuring light (for example, the origin on some display interface with a scale) displayed by the display component of the optical positioning component 1 (for example, a collimator).

[0124] In one embodiment, the angle offset information can be obtained by observing the spot position of the display component of the optical positioning component 1. In another embodiment, the angle offset information can be automatically obtained by processing the spot position image of the display panel of the optical positioning component 1 by the processor 6.

[0125] Using the above method, it can be determined whether the installed optical flat sheet meets the design requirements, that is, whether its angle offset information relative to the preset posture is small enough. It should be noted that in the context of this application, unless otherwise specified, the various steps of the method can be performed sequentially, in reverse order, or in whole or in part in parallel, etc., as long as it can achieve the expected effect of this application.

[0126] One or more embodiments of the present invention provide a method for improving installation accuracy. In one embodiment, before executing step S300 to fix the optical plate on the bracket 06, step S200 is executed, that is, adjusting the posture of the optical plate according to the acquired angle offset information (m, n), so that the angle offset information of the optical plate relative to the preset posture is less than a preset value. Obviously, the angle offset information acquired by the method of steps S410 to S430 can be used, and for the purpose of simplicity, it will not be repeated here.

[0127] Among them, in step S400, if the second reference 42 of the standard part 4 and the bracket 6 are matched with the first reference 21 in sequence to obtain the angle offset (m, n), the position relationship between the light spot and the coordinates on the display panel of the optical positioning component 1 and the optical flat plate is as follows: Figure 5A As shown, the Y axis corresponds to the width direction of the optical plate, and the X axis corresponds to the length direction of the optical plate. In step S200, the adjustment process of the corresponding adjustment mechanism 3 is as follows (due to the different implementation structures of the collimator 11 selected by the optical positioning component 1, the coordinates of the display panel and the coordinates of the optical plate itself may be different):

[0128] Assume that the sight lines are along the positive direction of the X-axis and the positive direction of the Y-axis respectively. If m and n are both positive values, it means that the offset of the optical plate is m clockwise around the X-axis and n clockwise around the Y-axis.

[0129] If m and n are both negative values, it means that the offset of the optical plate is |m| counterclockwise around the X axis and |n| counterclockwise around the Y axis;

[0130] If m is a positive value and n is a negative value, it means that the offset of the optical plate is m clockwise around the X axis and |n| counterclockwise around the Y axis;

[0131] If m is a negative value and n is a positive value, it means that the offset of the optical plate is |m| counterclockwise around the X axis and n clockwise around the Y axis;

[0132] Then the adjustment mechanism 3 needs to rotate by the same offset value in the directions around the Y-axis and the X-axis respectively, which are opposite to the angular offset measured by the optical positioning component 1.

[0133] In step S300, if the second datum 42 of the standard part 4 and the bracket 6 are matched with the third datum 8 and the first datum 21 in sequence to obtain the angle offset (m, n), that is, the second datum 42 of the standard part 4 is matched with the third datum 8, the optical positioning component 1 is adjusted so that the optical axis of the optical positioning component 1 is perpendicular to the standard surface 41 of the standard part 4 or the optical axis of the optical positioning component 1 is coincident with or parallel to the second datum 42, and then the bracket 06 is matched with the first datum 21 (that is, the limiting mechanism 2 positions the bracket 06 to the second predetermined posture, at this time, the mounting surface of the bracket 06 (that is, the partially defined plane for mounting the optical flat plate) ) is parallel to the standard surface (41) of the standard part 4, the light of the optical positioning component 1 is irradiated on the optical flat plate, and the angular offset (m, n) of the optical flat plate is obtained by directly reading the light spot position of the display panel of the optical positioning component 1, or the angular offset (m, n) of the optical flat plate is obtained by reading the light spot position of the display panel of the optical positioning component 1 through the processor 6, and the result after analysis and processing is displayed on the screen in any one or more forms of text, graphics, and charts, or output in the form of voice prompts, or sent to the driving mechanism of the adjustment mechanism 3, so as to drive the adjustment platform 32 to automatically adjust the posture of the optical flat plate.

[0134] In one embodiment, step S500, namely, a reference error calibration step, includes the following steps:

[0135] The second datum 42 of the standard part 4 is first matched with the third datum 8, and the posture of the optical positioning component 1 is adjusted so that the optical axis of the optical positioning component 1 is perpendicular to the standard surface 41 of the standard part 4. At this time, the light spot of the optical positioning component 1 is located at the center coordinate origin of the display panel; then the second datum 42 of the standard part 4 is matched with the first datum 21, and the angular deviation (Δm, Δn) between the third datum 8 and the first datum 21 is obtained from the display panel of the optical positioning component 1. This step can compensate for the angular offset measurement error caused by the processing error between the third datum 8 and the first datum 21.

[0136] Optionally, the above process may be repeated multiple times to obtain multiple groups of angle deviations, and the average of the groups is taken as the final angle deviation (Δm, Δn).

[0137] At this time, in step S200, the posture of the optical plate is adjusted according to the acquired angle offset (m, n), which specifically includes the following steps:

[0138] Assuming that the sight lines are along the positive direction of the X-axis and the positive direction of the Y-axis respectively, if m-Δm and n-Δn are both positive values, it means that the offset of the optical plate (02) is m-Δm rotated clockwise around the X-axis and n-Δn rotated clockwise around the Y-axis;

[0139] If m-Δm and n-Δn are both negative values, it means that the offset of the optical plate is |m-Δm| counterclockwise around the X axis and |n-Δn| counterclockwise around the Y axis;

[0140] If m-Δm is a positive value and n-Δn is a negative value, it means that the offset of the optical plate is m-Δm clockwise around the X axis and |n-Δn| counterclockwise around the Y axis;

[0141] If m-Δm is a negative value and n-Δn is a positive value, it means that the offset of the optical plate is |m-Δm| counterclockwise around the X axis and n-Δn clockwise around the Y axis;

[0142] Then the adjustment mechanism 3 needs to rotate by the same offset value in the directions around the Y-axis and the X-axis respectively, which are opposite to the angular offset obtained by the optical positioning component 1 .

[0143] In one embodiment, in step S200, if the second datum 42 of the standard component 4 and the bracket 6 are matched with the third datum 8 and the first datum 21 at the same time, and the optical axis of the optical positioning component 1 passes through the optical plate and the standard surface 41 of the standard component 4 in sequence, the angular offset (m', n') of the optical plate relative to the standard component 4 can be obtained by the optical positioning component 1, such as Figure 5B As shown, the coordinate origin O of the display panel of the optical positioning component 1 is moved to the light spot center O1 corresponding to the standard part 4 to establish a new coordinate system (the X' axis is parallel to the X axis, and the Y' axis is parallel to the Y axis), and the coordinates (m', n') of the light spot center O2 corresponding to the optical plate relative to the new origin O1 are calculated.

[0144] At this time, according to the obtained angular offset (m', n') of the optical plate relative to the standard component 4, the posture of the optical plate is adjusted, which specifically includes the following steps:

[0145] Assume that the sight lines are along the positive direction of the X-axis and the positive direction of the Y-axis respectively. If m' and n' are both positive values, it means that the offset of the optical plate is m' clockwise around the X-axis and n' clockwise around the Y-axis.

[0146] If m' and n' are both negative values, it means that the offset of the optical plate is |m'| counterclockwise around the X axis and |n'| counterclockwise around the Y axis;

[0147] If m' is a positive value and n' is a negative value, it means that the offset of the optical plate is m' clockwise around the X axis and |n'| counterclockwise around the Y axis;

[0148] If m' is a negative value and n' is a positive value, it means that the offset of the optical plate is |m'| counterclockwise around the X axis and n' clockwise around the Y axis;

[0149] Then the adjustment mechanism 3 needs to rotate by the same offset value in the directions around the Y-axis and the X-axis respectively, which are opposite to the angular offset measured by the optical positioning component 1.

[0150] Optionally, in step S300, the optical flat sheet is fixed on the bracket 06 by dispensing glue. In one embodiment, the dispensing position is symmetrical with respect to the geometric center of the optical lens. In one embodiment, at least one of UV glue, low shrinkage resin quick-drying glue, hot melt glue or two-component glue is used for dispensing glue. In one embodiment, UV glue can be dispensed on both sides of the optical flat sheet, and then the UV lamp simultaneously irradiates the parts on both sides of the optical flat sheet that need to be bonded to fix the optical flat sheet on the mounting surface of the bracket 06. In one embodiment, during the UV curing process, the angular offset of the optical flat sheet relative to the preset posture is monitored in real time by the optical positioning component 1. Once the angular offset of the optical flat sheet exceeds the allowable range, the posture of the optical flat sheet is adjusted by the adjustment mechanism 3 to keep the angular offset within the allowable range. After the optical flat sheet is fixed on the bracket 06, the operating cantilever 31 (adjustment mechanism 3) that bonds or adsorbs the optical flat sheet is separated from the optical flat sheet.

[0151] Optionally, in order to prevent the bracket 06 from moving during the UV curing process and affecting the fixing accuracy of the optical plate, the limiting member 22 of the limiting mechanism 2 can be used in conjunction with a limiting structure (e.g., a limiting hole) provided on the side of the frame of the bracket 06 to prevent the bracket 06 from rotating and moving.

[0152] In the above steps, the angular deviation (Δm, Δn) obtained in step S500 can eliminate the adjustment error caused by the processing error of the tooling of the adjustment system of the present invention; the standard part 4 is used as a reference to position the preset posture of the optical plate, which can compensate for the processing error of the bracket 06 itself, so that the optical plate is accurately fixed on the mounting surface of the bracket 06 according to the preset posture relative to the first reference 21, thereby ensuring the adjustment accuracy of the optical module.

[0153] When the first datum 21 is a plane, the fit between the second datum 42 of the standard component 4 and the third datum 8 or the first datum 21 affects the accuracy of the fixed posture of the optical plate. Therefore, after the second datum 42 of the standard component 4 and the third datum 8 or the first datum 21 are fitted, step S600 is performed to confirm the fit.

[0154] Step S600 is a step of confirming the degree of fit, i.e., whether the fitting surfaces of the second datum 42 of the standard component 4 and the third datum 8 or the first datum 21 are completely fitted. The fitting images of the fitting surfaces of the second datum 42 of the standard component 4 and the third datum 8 or the first datum 21 can be photographed in an airtight manner or by the camera 5 to determine whether the fitting surfaces of the second datum 42 of the standard component 4 and the third datum 8 or the first datum 21 are completely fitted.

[0155] Specifically, if the second datum 42 of the standard part 4 is in contact with the contact surface of the third datum 8 or the first datum 21, Figure 4A As shown, in the fitting image, the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 overlap into a line (with no gap between the two); if the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 are not properly fitted, there is a gap between the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21, then it is necessary to check and wipe the surfaces of the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 to ensure that they are flat, and press the standard part 4 or the bracket 06 to make the fitting surfaces of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 fully fit, and take the image again through the camera 5 until the requirements are met; if the flatness requirements cannot be met, it may be that the processing flatness of the standard part 4 or the bracket 06 is not enough or deformation has occurred, and the standard part 4 or the bracket 06 needs to be replaced.

[0156] In one embodiment, a light source is arranged on the opposite side of the camera 5, and the image outside the fitting surface of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 is used as the reference image. The contrast between the brightness of the image at the fitting surface of the second datum 42 of the standard part 4 and the third datum 8 or the first datum 21 and the brightness of the reference image is extracted by the processor 6. If the contrast is greater than a preset contrast value (which can be set to 80:1, 100:1, 150:1, etc.), that is, light is transmitted through the fitting surface, indicating that it is not completely fitted; if the contrast is less than the preset contrast value, that is, no light is transmitted through the fitting surface, then the surface fitting surface is completely fitted.

[0157] In another embodiment, a light source is arranged on the opposite side of the camera 5, and the contrast between the brightness of the image at the bonding surface of the second datum 42 and the third datum 8 or the first datum 21 of the standard part 4 and the brightness of the image of the adjacent area of ​​the bonding surface is extracted by the processor 6. If the contrast is greater than the preset contrast value, it indicates that there is no complete bonding; if the contrast is less than the preset contrast value, it indicates that the bonding surfaces are completely bonded.

[0158] The above method passes through step S500, that is, after obtaining the angular deviation (Δm, Δn) between the third datum 8 and the first datum 21, it only needs to place the second datum 42 of the standard part 4 on the third datum 8, and adjust the posture of the optical positioning component 1 (that is, in the first predetermined posture) so that the optical axis of the optical positioning component 1 is perpendicular to the standard surface 41 of the standard part 4. For the installation and adjustment of optical flat sheets in batch optical modules, it is only necessary to replace the bracket 06 for subsequent installation and adjustment. When installing different optical modules, there is no need to readjust the posture of the optical positioning component 1, thereby improving the installation and adjustment efficiency.

[0159] The present invention also provides another method for adjusting an optical plate in an optical module, which omits the step of measuring the angular deviation (Δm, Δn) between the third reference 8 and the first reference 21 (i.e., step S500), and in step S400, when obtaining the angular deviation of the optical plate relative to the preset posture, the standard part 4 and the bracket 06 are matched with the first reference 21 in sequence, that is, firstly, the second reference 42 of the standard part 4 is placed on the surface of the first reference 21 of the limiting mechanism 2 and fits tightly, and the posture of the optical positioning component 1 is adjusted so that the optical path (optical axis) of the optical positioning component 1 is vertically aligned with the standard surface 41 of the standard part 4 and the reflected light spot of the optical positioning component 1 is located at the center coordinate origin of its display panel (at this time, the posture of the standard surface 41 is consistent with the parameters of the preset posture); remove the standard part 4, match the bracket 06 with the first reference 21, and obtain the angular deviation (m, n) of the optical plate relative to the preset posture. The adjustment method omits the step of measuring the angular deviation (Δm, Δn) between the third reference 8 and the first reference 21, and improves the adjustment efficiency for a single adjustment. When assembling and adjusting different optical modules, the optical positioning assembly 1 needs to be adjusted repeatedly, which is inefficient for assembling and adjusting batch optical modules.

[0160] Based on the above optical plate assembly system and assembly method in the optical module, the embodiment of the present invention achieves the purpose of accurately fixing the optical plate in a preset posture relative to the first reference 21. One or more embodiments of the present invention have some or all of the following beneficial effects:

[0161] (a) The adjustment system of the present invention uses an optical positioning component 1 and a limit mechanism 2 to cooperate in quantitatively detecting the adjustment accuracy, which helps to improve the stability and consistency of the product;

[0162] (b) By using the standard part 4 as a reference to position the optical plate, the processing error of the bracket 06 itself can be compensated, so that the optical plate is accurately fixed on the mounting surface of the bracket 06 according to the preset posture relative to the first reference 21, thereby ensuring the assembly accuracy of the optical module.

[0163] (c) By obtaining the angle measurement error (Δm, Δn), the adjustment error caused by the machining error of the tooling of the adjustment system is eliminated, which further reduces the accuracy requirements of the tooling itself and reduces the processing cost;

[0164] (d) Through real-time monitoring of the dispensing and curing process of optical flat sheets, it is possible to promptly identify risks that affect accuracy during the curing process and make timely repairs to avoid rework or defective products, achieve efficient assembly and adjustment, improve work efficiency, and facilitate mass production.

[0165] (e) Glue is applied to both sides of the optical plate, and the parts to be bonded on both sides of the optical plate are irradiated by a UV lamp to reduce the curing time. Both sides are cured at the same time to reduce deformation and avoid the influence of the curing shrinkage of the glue on the angle and position of the optical plate.

[0166] The assembly and adjustment system is easy to operate, stable and reliable, and can meet the needs of mass production.

[0167] Those skilled in the art should understand that these embodiments are only used to illustrate the present invention but not to limit the scope of the present invention, and various equivalent variations and modifications made to the present invention belong to the disclosure of the present invention.

Claims

1. An adjustment method for an optical flat in an optical module, which is used to fix the optical flat in the optical module on a bracket relative to a first reference according to a preset posture. The adjustment method comprises the following steps: Install the bracket on the limiting mechanism of the adjustment system; Fix the optical flat on the bracket; Use the optical positioning component of the adjustment system to obtain the angular offset information of the optical flat relative to the preset posture, wherein the optical positioning component is in a first predetermined posture relative to the first reference and enables the light emitted by the optical positioning component to fall on the optical flat, and the optical positioning component in the first predetermined posture can only rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component, and the limiting mechanism enables the bracket to be in a second predetermined posture relative to the optical positioning component.

2. The adjustment method according to claim 1, characterized in that, the second predetermined posture refers to a posture in which the bracket cannot rotate, or a posture in which the bracket can rotate around an axis parallel to the optical axis of the optical positioning component.

3. The adjustment method according to claim 1, wherein, the adjustment system further comprises an adjustment mechanism, and the adjustment method further comprises: Before fixing the optical flat on the bracket, adjust the posture of the optical flat according to the angular offset information via the adjustment mechanism so that the angular offset information is less than a preset value.

4. The adjustment method as claimed in claim 3, wherein, the adjustment mechanism comprises an operation cantilever and an adjustment platform capable of driving the operation cantilever to rotate and translate, and a structure for detachably fixing the optical flat is provided at the end of the operation cantilever.

5. The adjustment method according to claim 1, wherein, the first reference of the adjustment system comprises a cylinder or a cone, the limiting mechanism comprises the first reference, and the first predetermined posture is the posture when the optical axis of the optical positioning component coincides with or is parallel to the axis of the cylinder or the cone. Among them, the installation of the bracket on the limiting mechanism of the adjustment system comprises: Engage the cylindrical hole on the bracket that matches the cylinder with the cylinder, and the cylindrical hole on the bracket is configured such that after engagement, the bracket can only rotate around the axis of the cylinder or translate along the axis; or Engage the conical hole on the bracket that matches the cone with the cone, and the conical hole on the bracket is configured such that after engagement, the bracket can only rotate around the axis of the cone.

6. The adjustment method according to claim 1, wherein, the first reference of the adjustment system comprises a plane, the limiting mechanism comprises the first reference and a limiting member that cooperate with the bracket, and the first predetermined posture means that the angle between the optical axis of the optical positioning component and the first reference is consistent with the parameters of the predetermined posture. Among them, the installation of the bracket on the limiting mechanism of the adjustment system comprises: Attach the part of the bracket that matches the plane to the plane; Install the bracket using the position-limiting member, and the bracket has a component matching the position-limiting member so that when the bracket is installed, it cannot rotate or can only rotate around the optical axis of the optical positioning component or translate along the optical axis of the optical positioning component.

7. The alignment method according to any one of claims 1 to 6, wherein, the obtaining of the angular offset information of the optical flat relative to the preset attitude by using the optical positioning component of the alignment system includes: the optical positioning component emits measurement light to the optical flat; the optical positioning component receives the reflected light and determines the information indicating the angle between the reflected light and the measurement light, and the reflected light is formed by the measurement light reflecting on the optical flat; determine the angular offset information of the optical flat relative to the preset attitude according to the obtained angle and the preset reference angle, wherein the preset reference angle is pre-calibrated using a standard component.

8. The alignment method according to any one of claims 1 to 6, wherein, the obtaining of the angular offset information of the optical flat relative to the preset attitude by using the optical positioning component of the alignment system includes: configure the standard component of the alignment system so that the standard surface of the standard component is perpendicular to the optical axis of the optical positioning component, and the light emitted by the optical positioning component can fall on the optical flat and the standard surface of the standard component; the optical positioning component emits measurement light to the optical flat and the standard component; the optical positioning component receives the reflected light of the optical flat and the reflected light of the standard component, and respectively determines the information indicating the angle between the reflected light of the optical flat and the measurement light and the angle between the reflected light of the standard component and the measurement light, and the reflected light of the optical flat and the reflected light of the standard component are formed by the measurement light reflecting on the optical flat and the standard surface of the standard component respectively; determine the angular offset information of the optical flat relative to the preset attitude according to the angle between the reflected light of the optical flat and the measurement light and the angle between the reflected light of the standard component and the measurement light.

9. The alignment method according to any one of claims 1 to 6, wherein, the fixing of the optical flat to the bracket includes: fix the optical flat to the bracket by means of dispensing glue.

10. The alignment method according to claim 9, wherein, the dispensing positions are symmetric with respect to the geometric center of the optical flat.

11. The alignment method according to claim 9, wherein, the glue used in the dispensing method is at least one of UV glue, low shrinkage resin quick-drying glue, hot melt glue or two-component glue.

12. The alignment method according to claim 10, wherein, the glue used in the dispensing method is at least one of UV glue, low shrinkage resin quick-drying glue, hot melt glue or two-component glue.

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