An automatic assembly and adjustment platform and method for a suspended bonding transmissive lens

Abstract

The present invention discloses an automatic alignment platform and method for a floating bonding transmissive lens. The present invention can be used for the alignment of transmissive lenses with a diameter of not less than 50 mm, solves the problems of high dependence on the technology and experience of skilled personnel in the traditional alignment of transmissive lenses and poor consistency of lens imaging quality, and realizes the automatic alignment and batch development of transmissive lenses. The invention includes: the adjustment form of the support adjustment unit; establishing a space coordinate system based on the installation position of the lens support adjustment unit; measuring the lens eccentricity and vertex height error and converting them into the linear adjustment amount of the support adjustment unit; driving the support adjustment unit to adjust the lens position until the eccentricity and height error are within the tolerance range, injecting glue on the side wall of the lens, and withdrawing the support adjustment unit after the glue spot is cured.

Description

Technical Field

[0001] The present invention relates to an automatic alignment platform and method for a suspension-bonded transmissive lens, belonging to the technical field of aerospace optical remote sensing. Background Art

[0002] With the development of technical fields such as optical measurement and remote sensing mapping, transmissive lenses with characteristics such as light weight and low cost have been in a state of mass production. Centering and alignment, as one of the most critical processes in the development of transmissive lenses, the technical levels such as alignment accuracy control and process stability directly affect the imaging quality of the lens. However, due to the differences in the experience and capabilities of operators, it is difficult to ensure the quality consistency of mass-produced products with traditional alignment methods. Therefore, it is very necessary to develop an automatic alignment method for transmissive lenses with higher R & D efficiency and better quality control.

[0003] At present, the alignment of transmissive lenses at home and abroad mainly adopts the direct mounting method, the precision centering method, and the computer-aided alignment method. The direct mounting method belongs to a traditional mechanical alignment method, in which the lens is directly inserted into the lens barrel or the lens is mounted in a frame and then centered and inserted into the lens barrel after being processed by a lens mounting machine. The alignment accuracy mainly depends on the machining accuracy of the structure. It is applied to the alignment of lenses with loose alignment tolerance requirements or low lens image quality requirements, and has the characteristic of high alignment efficiency, but the process stability is difficult to guarantee. For details, see the literature CN201210379811.8 A Method for Aligning a Near-Infrared Large Long-Focal-Length Lens Using a Coordinate Measuring Machine and CN202111257494.8 A Wide-Spectrum Long-Focal-Length High-Resolution Lens and Alignment Method. The precision centering method is to calculate the eccentricity of the lens by measuring the rotation trajectories of the spherical center image and the vertex image on the upper and lower surfaces of the lens around the rotation axis of the turntable, and control the misalignment of the lens by precisely adjusting the tilt and translation of the lens. It has the characteristic of high alignment accuracy, but has many alignment processes and is cumbersome to operate, and is not suitable for the development of mass-produced lenses. For details, see the literature CN201210471911.3 An Alignment Method for an Infrared Lens and CN202110435828.X A Lens Central Error Measuring System and Measuring Method. The computer-aided alignment method is to calculate the misalignment of the lens assembly based on the measured wavefront aberration of the lens and the aberration sensitivity matrix of each lens, and sequentially adjust the lens position until the image quality meets the requirements. It has the characteristic of intuitive lens imaging quality, but has high requirements for equipment and the calculation and analysis capabilities and operation skill levels of alignment personnel. For details, see the literature CN201821412668.7 An Integrated Measuring Device for Spacing Eccentricity and Wave Aberration of an Optical Lens and CN202111597887.3 A High-Precision Alignment Method for a Large-Aperture Optical Lens Group. The existing alignment process of transmissive lenses mainly relies on skilled personnel to operate, and cannot simultaneously meet the task requirements of high efficiency, excellent quality, and low cost of mass-produced lenses. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and provide an automatic alignment and adjustment platform and method for a floating bonding transmissive lens, which solves the problems that the existing transmissive lens alignment and adjustment process mainly relies on the technical level of operators, and it is difficult to ensure the alignment and adjustment accuracy, efficiency and quality consistency.

[0005] The technical solution of the present invention is: an automatic alignment and adjustment platform for a floating bonding transmissive lens, including a centering instrument, an articulated measuring arm, a lens barrel, a lens, 3 support and adjustment units, and a turntable. The support and adjustment unit is composed of a two-dimensional reduction stepping motor, a support table and a traction rod. The support table and the traction rod are respectively connected to the two output ends of the two-dimensional reduction stepping motor. The function of the support and adjustment unit is to realize the automatic adjustment of the lens translation, tilt and vertex height error according to the calculation result of the linear adjustment amount, and control the combined movement of the axial lifting of the support table and the radial telescopic of the traction rod through the reduction motor.

[0006] Place the lens barrel on the turntable, and evenly install 3 support and adjustment units on the same circumference of the side wall of the lens barrel. The lens is directly installed in the lens barrel, and the lens is supported by the 3 support and adjustment units distributed on the side wall of the lens barrel. The centering instrument is used to measure the center deviation of the lens, and the articulated measuring arm is used to measure the vertex height error of the lens.

[0007] Further, the linear control accuracy of the two-dimensional reduction stepping motor of the support and adjustment unit is ≤0.05mm, the axial lifting load capacity of a single support table is not less than the gravity of the lens, and the maximum radial propulsion pressure of the traction rod is ≤1Mpa.

[0008] Further, based on the alignment and adjustment method of the automatic alignment and adjustment platform of the present invention, the following steps are included:

[0009] S1. Assemble the lens automatic alignment and adjustment platform on the turntable.

[0010] S2. Establish a space coordinate system: Determine the contact point between the support table of a support and adjustment unit and the lens as the reference point T1, and use the rotation axis of the turntable as the reference axis Z, with the reference axis Z pointing to the ground. Use the plane passing through the reference point T1 and perpendicular to the reference axis Z as the X0Y plane to establish a space coordinate system, where: the origin of the space coordinate system is the intersection point of the reference axis Z and the X0Y plane. Use the reference axis passing through the origin and T1 as the Y axis, with the Y axis pointing to T1, and determine the direction of the X axis by the right-hand rule, and set the 0° starting point of the turntable to coincide with the positive direction of the X axis. After the space coordinate system is established, calibrate the projection coordinates of the contact points between the support tables of the other two support and adjustment units and the lens on the X0Y plane.

[0011] S3. Calculate the axial linear adjustment of the support platform: Use the centering instrument and the articulated measuring arm to measure the center deviation and vertex loss height of the lens respectively. In the spatial coordinate system, establish the plane equation of the lens reference end face. Substitute the coordinates of the projection points of the contact points between the support platform of the three support adjustment units and the lens on the reference end face into this plane equation, and obtain the z coordinate values of the three contact points in the spatial coordinate system, and combine them with the theoretical vertex loss height S 理论 and the measured vertex loss height S 实测 The deviation is obtained to obtain the axial linear adjustment amount of the support platform required by each support adjustment unit;

[0012] S4. Calculate the radial linear adjustment amount of the traction rod: establish a plane circle equation of the lens diameter on the X0Y plane, calculate the distance from the contact point between the support platform of the three support adjustment units and the lens to the coordinate origin through the plane circle equation, and then subtract it from the lens radius respectively to obtain the radial linear adjustment amount of the traction rod required for each support adjustment unit;

[0013] S5, support adjustment unit adjustment: according to the calculated axial linear adjustment of the support platform and the radial linear adjustment of the traction rod, the axial linear adjustment of the support platform is performed first, and after the deviation of the tilt angle of the lens measured by the centering device is not greater than the preset threshold, the radial linear adjustment of the traction rod is performed;

[0014] S6. After one round of adjustment, re-measure the center deviation and vertex height loss of the lens. If the measurement results do not meet the installation tolerance requirements, continue to adjust the lens according to steps S3 to S5 until the center deviation and vertex height loss of the lens measured by the centering instrument and the articulated measuring arm are within the tolerance range.

[0015] S7. Inject glue radially into the lens through the glue injection holes on the side wall of the lens barrel, and remove all support adjustment units after the glue spots are solidified.

[0016] Furthermore, the projection coordinates of the contact points between the support platform of the support adjustment unit and the lens in the X0Y plane are respectively: Where r0 is the lens radius.

[0017] Furthermore, the use of a centering instrument to measure the center deviation of the lens in step S3 includes: an off-axis amount d1 of the center of the upper surface of the lens from the Z axis, an off-axis amount d2 of the center of the lower surface of the lens from the Z axis, a polar coordinate angle θ1 formed by a line connecting the projection of the center of the upper surface on the X0Y plane and the origin and the X axis, a polar coordinate angle θ2 formed by a line connecting the projection of the center of the lower surface on the X0Y plane and the origin and the X axis, a surface inclination angle α of the upper surface of the lens relative to the reference end surface, a surface inclination angle β of the lower surface relative to the reference end surface, a translational misalignment amount l of the lens, and an angle σ between the translational misalignment direction and the X axis.

[0018] Further, the method for establishing the plane equation of the reference end face of the lens in step S3 is specifically as follows: In the space coordinate system, taking the space vector (A, B, C) of the connection line of the centers of the upper and lower surfaces of the lens as the normal vector, and passing through the reference point T1 to establish the plane equation of the reference end face of the lens, and the expression form is as follows:

[0019] Ax + By + Cz - Br0 = 0

[0020] In the above formula, A, B, and C are the components of the normal vector of the plane equation on the x-axis, y-axis, and z-axis respectively.

[0021] Further, A, B, and C are calculated by the following formulas:

[0022]

[0023] Among them, d1 and d2 are the off-axis amounts of the centers of the upper and lower surfaces of the lens from the Z-axis respectively; θ1 and θ2 are the polar coordinate angles formed by the connection lines between the projections of the centers of the upper and lower surfaces on the X0Y plane and the origin and the X-axis; α and β are the surface tilt angles of the upper and lower surfaces of the lens relative to the reference end face respectively; r1 and r2 are the vertex curvature radii of the upper and lower surfaces of the lens respectively; d is the center thickness of the lens.

[0024] Further, the required axial linear adjustment amount of the support platform for each support adjustment unit in step S3 The calculation formula is as follows:

[0025]

[0026] Among them, S 理论 , S 实测 are the theoretical value and the measured value of the lens vertex height error respectively; x n , n = 1, 2, 3 are the x-axis coordinate values of the contact points between the support platform of the nth support adjustment unit and the lens, and y n , n = 1, 2, 3 are the y-axis coordinate values of the contact points between the support platform of the nth support adjustment unit and the lens.

[0027] Further, the specific method for establishing the plane circle equation of the lens diameter in step S4 is as follows: Combining the angles ω n , n = 1, 2, 3 formed by the connection lines between the projection points of the contact points between the support platforms of the three support adjustment units and the lens on the X0Y plane and the origin and the X-axis, taking the intersection point of the space vector of the connection line of the centers of the two surfaces of the lens and the X0Y plane as the center, and taking the lens radius r0 as the radius, to establish the plane circle equation of the outer diameter of the lens on the X0Y plane.

[0028] Further, step S4 calculates the required radial linear adjustment amount of the traction rod for each support adjustment unit The calculation formula is as follows:

[0029]

[0030] where P n , n = 1, 2, 3 is the distance from the contact point between the support platform of the three support adjustment units and the lens to the origin, which is calculated by the established plane circle equation; ω n , n = 1, 2, 3 is the angle formed by the line connecting the projection point of the contact point between the support platform of the 3 support adjustment units and the lens on the X0Y plane and the origin and the X-axis. ω1 = 90°, ω2 = 210°, ω3 = 330°; r0 is the radius of the lens; l is the translational misalignment of the lens; σ is the angle between the translational misalignment direction of the lens and the X-axis.

[0031] The beneficial effects of the present invention compared with the prior art are as follows:

[0032] 1) The technology of the present invention directly inserts the lens into the barrel, and clamps the lens and adjusts the eccentricity through 3 support adjustment units evenly distributed on the side wall of the barrel, eliminating the processes such as lens framing and gasket fitting in the traditional adjustment method of transmissive lenses. While greatly improving the adjustment efficiency, it reduces the labor and material costs.

[0033] 2) Based on the precision centering method of transmissive lenses, the technology of the present invention adopts calculation methods such as coordinate system establishment and projection conversion according to the measured values of the lens eccentricity and vertex height error. The computer automatically analyzes the axial linear adjustment amount of the support platform and the radial linear adjustment amount of the traction rod of the 3 support adjustment units required for lens adjustment, and drives the combined movement of each support adjustment unit through electric control to adjust the tilt, translation and vertex height error of the lens until within the tolerance range. The automation of the adjustment process can effectively avoid the risks of process stability and quality consistency deviation caused by the differences in the experience and ability of operators while ensuring the adjustment accuracy. Through practical tests, when using the technology of the present invention in the adjustment process of lenses with a diameter of 100 - 200 mm, the centering adjustment of 1 lens can be completed by iterative adjustment 2 - 3 times. The control accuracies of tilt, translation and vertex height error are respectively better than 2″, 5μm and 3μm. The adjustment efficiency and accuracy are far superior to the traditional adjustment method, and at the same time, the labor cost is reduced.

[0034] 3) After the adjustment of the transmissive lens is completed, all the support adjustment units are withdrawn, and each lens is in a glued suspension state, avoiding the risk of the influence of the stress generated by the direct contact between the optical parts and the structure on the lens surface shape, further ensuring the imaging quality of the lens and improving the stability of the adjustment process.

[0035] 4) The technology of the present invention is applied to the mass production and alignment of a transmissive lens with 6 lenses and an aperture of approximately 150 mm, and is compared with the traditional centering alignment method. The lens alignment cycle is reduced from 35 days / set to 18 days / set, and the control accuracy of lens eccentricity and spacing is improved from 10″, 10 μm, and 10 μm to 2″, 5 μm, and 3 μm. The number of operators is reduced from 5 to 3. While improving the alignment efficiency and quality, the development cost is reduced. Brief Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the platform based on the alignment method of the present invention;

[0037] Figure 2 It is a flowchart of the steps of the alignment method of the present invention. Detailed Description of the Invention

[0038] Figure 1 It is a schematic diagram of the platform based on the alignment method of the present invention. The hardware used includes a centering instrument 1, an articulated measuring arm 2, a lens barrel 3, a lens 4, a support adjustment unit 5, and a turntable 6. The lens eccentricity and height deviation measurement platform built by the centering instrument 1, the articulated measuring arm 2, the lens barrel 3, the lens 4, and the turntable 6 is the basic platform for automatic lens alignment using the technology of the present invention. The support adjustment unit 5 consists of a two-dimensional decelerating stepper motor, a support platform, and a traction rod. The support platform and the traction rod are respectively connected to the two output ends of the two-dimensional decelerating stepper motor and are driven by the two-dimensional decelerating stepper motor. The main function of the support adjustment unit 5 is to realize the automatic adjustment of the translation, tilt, and vertex height deviation of the lens 4 by controlling the combined movement of the axial lifting of the support platform and the radial expansion and contraction of the traction rod according to the calculation result of the linear adjustment amount.

[0039] Figure 2 It is a flowchart of the steps of the alignment method of the present invention. The automatic alignment method of the present invention specifically includes the following steps:

[0040] 1) Lens support and adjustment form. Place the lens barrel 3 on the turntable 6, use a dial indicator to measure the circular runout and end face runout of the structural reference plane of the lens barrel 3, adjust the position of the lens barrel 3 so that both the circular runout and end face runout of the structural reference plane of the lens barrel 3 are less than 0.01 mm, and use fixing devices such as screws and pressing blocks to fasten the position of the lens barrel 3 on the turntable 6 at this time. Install each support and adjustment unit 5 on the side wall of the lens barrel 3 and fasten it with screws. Check whether the functions of the electric control support platform for axial lifting and the traction rod for radial expansion and contraction of each support and adjustment unit 5 are in good condition. The linear control accuracy of the two-dimensional reduction motor is better than 0.001 mm, the axial lifting load capacity of the support platform is not less than the gravity of the lens, and the maximum radial propulsion pressure of the traction rod is not greater than 1 Mpa. Directly install the lens 4 into the lens barrel 3, and rely on the three support and adjustment units 5 distributed on the side wall of the lens barrel 3 at an interval angle of better than 120° ± 1° to support it. Through the combined movement of the support platform and the traction rod of the support and adjustment unit 5, the translation, tilt, and vertex height adjustment of the lens 4 are realized.

[0041] 2) Establish a space coordinate system. Take the contact point between the support platform of a certain support and adjustment unit 5 of the lens 4 to be adjusted and the lens 4 as the reference point T1, take the rotation axis of the turntable 6 as the reference axis Z, with the reference axis Z pointing to the ground, and take the plane passing through the reference point T1 and perpendicular to the reference axis Z as the X0Y plane. Among them, the origin of the space coordinate system is the intersection point of the reference axis Z and the X0Y plane. Take the reference axis passing through the origin and T1 as the Y axis and pointing to T1, and establish a space coordinate system according to the right-hand rule, and set the 0° starting point of the turntable 6 to coincide with the positive direction of the X axis. At this time, the included angles ω n , n = 1, 2, are 90°, 210°, and 330° respectively, and the projection point coordinates are where r0 is the radius of the lens.

[0042] 3) Calculate the axial linear adjustment amount of the support platform. Rotate the turntable 6, and use the centering instrument 1 to measure the spatial position and angle of the spherical center images on the upper and lower surfaces of the lens 4 to be adjusted respectively, the off-axis amount d1 of the spherical center of the upper surface of the lens (4) from the Z axis, the off-axis amount d2 of the spherical center of the lower surface of the lens (4) from the Z axis, the polar coordinate angle θ1 formed by the connection line between the projection of the spherical center of the upper surface in the X0Y plane and the origin and the X axis, the polar coordinate angle θ2 formed by the connection line between the projection of the spherical center of the lower surface in the X0Y plane and the origin and the X axis, the surface tilt angle α of the upper surface of the lens (4) relative to the reference end face, the surface tilt angle β of the lower surface relative to the reference end face, the translation misalignment amount l of the lens (4), and the included angle σ between the translation misalignment direction and the X axis. Use the articulated measuring arm 2 to establish a measurement plane with the structural reference plane of the lens barrel 3, and collect the actual vertex height S 实测 of the upper surface of the lens 4 through the measuring arm 2, and compare it with the theoretical vertex height S 理论 given by the structural model.

[0043] In the coordinate system XYZ, taking the spatial vector (A, B, C) of the connection line of the spherical centers of the two surfaces of the lens 4 as the normal vector, and passing through the reference point T1 to establish the plane equation of the reference end face of the lens 4. Substitute the coordinates of the projection points of the contact points between the three support adjustment units 5 and the lens 4 on the reference end face into this plane equation to obtain the z coordinate values of the 3 contact points in the space coordinate system, and combine with the theoretical vertex height S 理论 and the deviation of the measured vertex height S 实测 to obtain the required axial linear adjustment amount of the support platform of the support adjustment unit 5

[0044] Among them: The expression form of the plane equation for establishing the reference end face of the lens 4 is as follows:

[0045] Ax + By + Cz - Br0 = 0

[0046] In the above formula, A, B, and C are the components of the normal vector of the plane equation on the x-axis, y-axis, and z-axis respectively, and D = -Br0; A, B, and C are calculated through the following formulas:

[0047]

[0048] In the above formula, d1 and d2 are the off-axis amounts of the spherical centers of the upper and lower surfaces of the lens (4) from the Z-axis; θ1 and θ2 are the polar coordinate angles formed by the connection lines between the projections of the spherical centers of the upper and lower surfaces on the X0Y plane and the origin and the X-axis; α and β are the surface inclination angles of the upper and lower surfaces of the lens (4) relative to the reference end face; r1 and r2 are the vertex curvature radii of the upper and lower surfaces of the lens (4); d is the central thickness of the lens (4).

[0049] The required axial linear adjustment amount of the support platform of each support adjustment unit 5 The calculation formula is as follows:

[0050]

[0051] Among them, S 理论 , S 实测 are the theoretical value and the measured value of the vertex height of the lens respectively; x n is the x-axis coordinate value of the nth support adjustment unit (5), and y n is the y-axis coordinate value of the nth support adjustment unit (5); n = 1, 2, 3.

[0052] 4) Calculate the radial linear adjustment amount of the traction rod: Establish the plane circle equation of the diameter of the lens 4 on the X0Y plane, calculate the distances from the contact points between the three support adjustment units 5 and the lens 4 to the coordinate origin through the plane circle equation, and then subtract the lens radius respectively to obtain the required radial linear adjustment amount of the traction rod of each support adjustment unit 5.

[0053] The specific method of establishing the plane circle equation of the diameter of the lens 4 is as follows: combining the projection point of the contact point between the support platform of the three support adjustment units 5 and the lens 4 on the X0Y plane and the angle ω formed by the line connecting the origin and the X axis n , n=1,2,3, take the intersection of the spatial vector of the line connecting the spherical center images of the two surfaces of lens 4 and the X0Y plane as the center of the circle, take the lens radius r0 as the radius, and establish the plane circle equation of the outer diameter of lens 4 on the X0Y plane.

[0054] After the plane circle equation is established, the distance P from the contact point between the support platform of the three support adjustment units 5 and the lens 4 to the origin is calculated by the established plane circle equation. n , n=1,2,3, and then subtract them from the lens radius to get the radial linear adjustment amount of the traction rod required by each support adjustment unit 5. The calculation formula is as follows:

[0055]

[0056] Among them, ω n ,n=1,2,3 are the angles formed by the line connecting the projection point of the contact point between the support platform of the three support adjustment units 5 and the lens 4 in the X0Y plane and the origin and the X-axis, ω1=90°, ω2=210°, ω3=330°; r0 is the lens radius; l is the translation misalignment of the lens 4; σ is the angle between the translation misalignment direction of the lens and the X-axis.

[0057] 5) Adjustment of the support adjustment unit 5: According to the calculated axial and radial linear adjustment amounts, the three support adjustment units 5 are electrically driven to move in combination, and the axial linear adjustment of the support platform is performed first. After the deviation of the tilt angle of the lens 4 measured by the centering device 1 is not greater than the preset threshold, the radial linear adjustment of the traction rod is performed; in this embodiment, the preset threshold is 0.1°. After one round of adjustment, the center deviation and vertex height loss of the lens 4 are re-measured. If the measurement results do not meet the installation tolerance requirements, the lens 4 is adjusted according to steps 3) and 4) until the center deviation and vertex height loss of the lens 4 measured by the centering device 1 and the articulated measuring arm 2 are within the tolerance range.

[0058] 6) Support adjustment unit 5 is adjusted and withdrawn: when the measurement result meets the tolerance requirement, glue is radially injected into the glue injection hole on the side wall of the lens barrel 3 to the lens 4, and after the glue spot is solidified, all support adjustment units 5 are withdrawn to put the lens 4 in a glued suspended state.

[0059] Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for assembling an automatic assembling platform for a suspended bonding transmission lens, the platform comprising a centering device, an articulated measuring arm, a lens barrel, a lens, a turntable and three support adjustment units; the support adjustment unit is composed of a two-dimensional reduction stepping motor, a support platform and a traction rod, the support platform and the traction rod are respectively connected to two output ends of the two-dimensional reduction stepping motor, and the function of the support adjustment unit is to control the axial lifting and lowering of the support platform and the radial extension and retraction of the traction rod through the reduction motor according to the calculation result of the linear adjustment amount, so as to realize the automatic adjustment of the lens translation, tilt and vertex height loss; Place the lens barrel on a turntable, evenly install three support adjustment units on the same circumference of the side wall of the lens barrel, and directly install the lens into the lens barrel. The lens is supported by the three support adjustment units distributed on the side wall of the lens barrel. Characterized in that: The adjustment method is as follows: S1, assembling the automatic lens assembly and adjustment platform on a turntable; S2. Establishing a spatial coordinate system: Determine the contact point between the support platform of one support adjustment unit and the lens as the reference point T1, and take the rotation axis of the turntable as the reference axis Z, with the reference axis Z pointing to the earth, and take the plane passing through the reference point T1 and perpendicular to the reference axis Z as the X0Y plane to establish a spatial coordinate system, wherein: the origin of the spatial coordinate system is the intersection of the reference axis Z and the X0Y plane, the reference axis passing through the origin and T1 is the Y axis, with the Y axis pointing to T1, the direction of the X axis is determined by the right-hand rule, and the 0° starting point of the turntable is set to coincide with the positive direction of the X axis; after the spatial coordinate system is established, calibrate the projection coordinates of the contact points between the support platforms of the other two support adjustment units and the lens in the X0Y plane; S3. Calculate the axial linear adjustment amount of the support platform: Use a centering instrument and an articulated measuring arm to measure the centering deviation and vertex height loss of the lens respectively. In the space coordinate system, establish the plane equation of the reference end face of the lens, substitute the coordinates of the projection points of the contact points between the three support adjustment unit support platforms and the lens on the reference end face into this plane equation, obtain the z coordinate values of the 3 contact points in the space coordinate system, and combine the theoretical vertex height loss S 理论 and the measured vertex height loss S 实测 deviation to obtain the axial linear adjustment amount of the support platform required for each support adjustment unit; S4. Calculate the radial linear adjustment amount of the traction rod: establish a plane circle equation of the lens diameter on the X0Y plane, calculate the distance from the contact point between the support platform of the three support adjustment units and the lens to the coordinate origin through the plane circle equation, and then subtract it from the lens radius respectively to obtain the radial linear adjustment amount of the traction rod required for each support adjustment unit; S5, support adjustment unit adjustment: according to the calculated axial linear adjustment of the support platform and the radial linear adjustment of the traction rod, the axial linear adjustment of the support platform is performed first, and after the deviation of the tilt angle of the lens measured by the centering device is not greater than the preset threshold, the radial linear adjustment of the traction rod is performed; S6. After one round of adjustment, re-measure the center deviation and vertex height loss of the lens. If the measurement results do not meet the installation tolerance requirements, continue to adjust the lens according to steps S3 to S5 until the center deviation and vertex height loss of the lens measured by the centering instrument and the articulated measuring arm are within the tolerance range. S7. Inject glue radially into the lens through the glue injection holes on the side wall of the lens barrel, and remove all support adjustment units after the glue spots are solidified.

2. The alignment method of an automatic alignment platform for a suspended bonding transmissive lens according to claim 1, characterized in that: The linear control accuracy of the two-dimensional reduction motor of the support adjustment unit is ≤0.05mm, the axial lifting load capacity of a single support platform is not less than the gravity of the lens, and the maximum radial propulsion pressure of the traction rod is ≤1Mpa.

3. The alignment method of an automatic alignment platform for a suspended and bonded transmissive lens according to claim 1, characterized in that: The projection coordinates of the contact points between the support platform of the support adjustment unit described in step S2 and the lens on the X0Y plane are respectively: where r0 is the radius of the lens.

4. The alignment method of an automatic alignment platform for a suspended bonding transmissive lens according to claim 1, characterized in that: The measurement of the decentration of the lens using the centering instrument described in step S3 includes: the off-axis amount d1 of the center of the upper surface of the lens from the Z axis, the off-axis amount d2 of the center of the lower surface of the lens from the Z axis, the polar coordinate angle θ1 formed by the line connecting the projection of the center of the upper surface on the X0Y plane and the origin and the X axis, the polar coordinate angle θ2 formed by the line connecting the projection of the center of the lower surface on the X0Y plane and the origin and the X axis, the surface tilt angle α of the upper surface of the lens relative to the reference end face, the surface tilt angle β of the lower surface relative to the reference end face, the translational misalignment amount l of the lens, and the included angle σ between the translational misalignment direction and the X axis.

5. The alignment method of an automatic alignment platform for a floating adhesive transmissive lens according to claim 1, wherein: The method for establishing the plane equation of the reference end face of the lens described in step S3 is specifically as follows: In the space coordinate system, taking the space vector (A, B, C) of the line connecting the images of the centers of the upper and lower surfaces of the lens as the normal vector, and establishing the plane equation of the reference end face of the lens passing through the reference point T1, and the expression form is as follows: Ax + By + Cz - Br0 = 0 In the above formula, A, B, and C are the components of the normal vector of the plane equation on the x-axis, y-axis, and z-axis respectively.

6. The alignment method of the automatic alignment platform for the suspended bonding transmissive lens according to claim 5, characterized in that: A, B, and C are calculated through the following formulas: where d1 and d2 are the off-axis amounts of the centers of the upper and lower surfaces of the lens from the Z axis respectively; θ1 and θ2 are the polar coordinate angles formed by the lines connecting the projections of the centers of the upper and lower surfaces on the X0Y plane and the origin and the X axis respectively; α and β are the surface tilt angles of the upper and lower surfaces of the lens relative to the reference end face respectively; r1 and r2 are the vertex curvature radii of the upper and lower surfaces of the lens respectively; d is the center thickness of the lens.

7. The alignment method of the automatic alignment platform for the suspended bonding transmissive lens according to claim 1, characterized in that: The axial linear adjustment amount of the support platform required for each support adjustment unit described in step S3 The calculation formula is as follows: Among them, S 理论 , S 实测 are respectively the theoretical value and the measured value of the lens vertex sag; x n , n = 1, 2, 3 are the x-axis coordinate values of the contact points between the support platforms of the nth support adjustment unit and the lens, y n , n = 1, 2, 3 are the y-axis coordinate values of the contact points between the support platforms of the nth support adjustment unit and the lens.

8. The alignment method of an automatic alignment platform for a floating adhesive transmissive lens according to claim 1, characterized in that: The specific method for establishing the plane circle equation of the lens diameter described in step S4 is as follows: Combine the angles ω formed by the lines connecting the projection points of the contact points between the support platforms of the three support adjustment units and the lens on the X0Y plane and the origin and the X-axis n , n = 1, 2, 3. Take the intersection point of the spatial vector connecting the centers of the two surfaces of the lens and the X0Y plane as the center, and the lens radius r0 as the radius, and establish the plane circle equation of the outer diameter of the lens on the X0Y plane.

9. The alignment method of an automatic alignment platform for a floating adhesive transmission lens according to claim 1, characterized in that: Step S4 calculates the radial linear adjustment amount of the drawbar required for each support adjustment unit The calculation formula is as follows: where P n , n = 1, 2, 3 is the distance from the contact point of the support platform of the three support adjustment units with the lens to the origin, calculated by the established plane circle equation; ω n , n = 1, 2, 3 is the angle formed by the line connecting the projection point of the contact point of the support platform of the 3 support adjustment units with the lens on the X0Y plane and the origin and the X-axis. ω1 = 90°, ω2 = 210°, ω3 = 330°; r0 is the lens radius; l is the translational misalignment of the lens; σ is the angle between the translational misalignment direction of the lens and the X-axis.

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