CN111024373B - Focal plane measurement and correction device and focal plane measurement and correction method for lens assembly - Google Patents
Focal plane measurement and correction device and focal plane measurement and correction method for lens assembly Download PDFInfo
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- CN111024373B CN111024373B CN201911360175.2A CN201911360175A CN111024373B CN 111024373 B CN111024373 B CN 111024373B CN 201911360175 A CN201911360175 A CN 201911360175A CN 111024373 B CN111024373 B CN 111024373B
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- reticle
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- correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0221—Testing optical properties by determining the optical axis or position of lenses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
- G01M11/0264—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested by using targets or reference patterns
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- Lens Barrels (AREA)
Abstract
The invention relates to a focal plane measurement and correction device and a focal plane measurement and correction method for a lens assembly. Comprises a focal plane measuring device, a focal plane correcting device and a control device; the focal plane measuring device comprises a measuring frame, a light source device, a light homogenizing plate, a reticle, a first lens assembly mounting seat, a digital camera, a protection cylinder and a reticle adjusting and driving device; the reticle adjustment driving device is provided with a sensor; the control device can calculate the focal plane position deviation value of the tested lens of the lens assembly to be detected and the tested lens of the standard lens assembly; the focal plane correcting device comprises a correcting rack, a second lens component mounting seat, a rotary clamping component and a rotary driving device; the control device is connected with the focal plane correcting device so as to control the rotation of the rotation driving device according to the focal plane position deviation value. The invention can realize the functions of detecting and automatically correcting the focal plane of the lens assembly, thereby improving the focal plane precision of the lens assembly and the focal plane consistency of the lens assemblies in the same batch.
Description
Technical Field
The invention relates to the field of lens equipment, in particular to a focal plane measurement and correction device and a focal plane measurement and correction method for a lens assembly.
Background
Monitoring cameras have undergone black and white to color since the last 60 years of birth and development in the last 60 th century; definition ranges from VGA to 720P, 1080P to the current development history of 5MP and 8 MP. The lens is subjected to the same process along with the development of the camera, and the precision and stability requirements of the camera with definition above millions on related accessories such as the lens and the assembly thereof are higher and higher at present, wherein the lens is taken as an optical imaging core component and a lens seat for fixing the lens directly participates in the production and assembly of the camera with millions, and is mainly reflected in the aspects of screw thread matching tightness (controlled by torsion) of the lens and the lens seat, whether an imaging optical axis of the lens is coaxial with a mechanical axis of the lens seat or not, and the like, so that the whole assembly efficiency and the imaging quality of the camera are directly influenced; to solve the above problems in the camera manufacturing process, optical manufacturers screw the lens directly into the lens mount (which is referred to in the industry as a lock-up) as a component to downstream camera manufacturers, and at present optical factories typically employ two lock-up approaches:
One is a method of manually or electrically operating the lens to screw in the lens mount to complete the assembly; the other is to use a lens locking machine to lock and attach, and the lens locking machine can mainly finish the functions of automatic feeding of lenses, automatic feeding of lens seats, automatic locking and attaching and the like. The locking methods can only control the mechanical height of the lens to fix the focal plane, namely, the lens is rotated to a specified height position relative to the lens seat. The method does not consider the problem of thickness tolerance in lens processing, so that focal plane consistency is poor, and accuracy of +/-0.2 to +/-0.5 mm can be generally achieved, so that the assembly through rate, production efficiency and consistency of the camera are poor.
Disclosure of Invention
The invention aims at: the focal plane measuring and correcting device can realize the functions of detecting and automatically correcting the focal plane of the lens assembly, thereby improving the focal plane precision of the lens assembly and the focal plane consistency of the same batch of lens assemblies.
The invention is realized by the following technical scheme:
scheme one:
the utility model provides a camera lens subassembly focal plane measures orthotic devices, the camera lens subassembly includes lens mount and threaded connection's measured lens on the lens mount, its characterized in that: the focal plane measuring and correcting device of the lens assembly comprises a focal plane measuring device, a focal plane correcting device and a control device;
The focal plane measuring device comprises a measuring rack, a light source device, a light homogenizing plate, a reticle, a first lens component mounting seat and a digital camera, wherein the light source device, the light homogenizing plate, the reticle, the first lens component mounting seat and the digital camera are sequentially arranged on the measuring rack along the extending direction of a measuring optical axis; the reticle is provided with a reticle identification pattern;
the focal plane measuring device further comprises a protection barrel used for enabling the first lens assembly mounting seat to be fixedly mounted on the measuring rack, the first lens assembly mounting seat is coaxially and fixedly arranged at the top of the protection barrel, and the protection barrel is arranged on one side, facing the light source device, of the first lens assembly mounting seat along the measuring optical axis direction; the lens assembly is fixedly arranged on a first lens assembly mounting seat through a lens seat thereof, and a light transmission hole extending along the direction of a measuring optical axis is formed in the middle of the first lens assembly mounting seat; the digital camera is fixedly arranged on the other side of the first lens component mounting seat, which is away from the light source device, through the measuring rack and can shoot images of the reticle identification patterns presented by the measured lens after the light source device passes through the light homogenizing plate and the reticle;
The focal plane measuring device also comprises a reticle cylinder used for fixedly mounting the light source device, the light homogenizing plate and the reticle, and a reticle adjusting driving device used for driving the reticle cylinder to move along the direction of the measuring light axis approaching to or separating from the first lens assembly mounting seat; one end of the reticle cylinder, which is provided with a reticle and a light homogenizing plate, extends into the protection cylinder, and the other end of the reticle cylinder extends out of the protection cylinder to be connected with a reticle adjusting driving device; the reticle adjustment driving device is also provided with a sensor for detecting the position of the reticle cylinder;
the control device is respectively connected with the sensor, the reticle adjustment driving device and the digital camera to acquire detection signals and calculate focal plane position deviation values of a detected lens of the lens assembly to be detected and a detected lens of the standard lens assembly according to the detection signals;
The focal plane correcting device comprises a correcting frame, a second lens component mounting seat, a rotary clamping component and a rotary driving device, wherein the second lens component mounting seat is fixedly connected with the correcting frame relatively and used for fixedly mounting a lens seat of a lens component, the rotary clamping component is rotationally connected with the correcting frame and used for clamping a tested lens of the lens component fixedly mounted on the second lens component mounting seat and driving the tested lens to rotate, the rotary driving device is connected between the rotary clamping component and the correcting frame and used for driving the rotary clamping component to rotate, and the tested lens of the lens component fixedly mounted on the second lens component mounting seat and the rotary central line of the rotary clamping component are positioned on the same correcting optical axis;
The control device is connected with the rotary driving device of the focal plane correcting device so as to control the rotary driving device to rotate according to the focal plane position deviation value, so that the focal plane position deviation value is eliminated, and the focal plane position of the tested lens of the lens assembly to be detected is consistent with that of the tested lens of the standard lens assembly.
Preferably, the digital camera comprises an imaging lens and a photosensitive sensor which are sequentially arranged along a measuring optical axis from a direction close to the first lens assembly mounting seat to a direction far away from the first lens assembly mounting seat; the photosensitive sensor is connected with the control device and is used for transmitting the photographed image of the reticle identification pattern to the control device.
Preferably, the measuring rack comprises a lens seat mounting rack and a camera rack fixedly mounted and connected with the lens seat mounting rack, the protection cylinder is fixedly mounted on the lens seat mounting rack, and the digital camera is fixedly mounted on the camera rack;
The reticle adjusting driving device comprises an adjusting slide rail fixedly arranged on the mirror seat mounting frame and extending along the direction parallel to the measuring optical axis, an adjusting slide block which is connected to the adjusting slide rail in a sliding manner and can slide along the direction parallel to the measuring optical axis relative to the adjusting slide rail, an adjusting motor fixedly arranged on the side wall of the adjusting slide rail, an adjusting transmission assembly connected between an output shaft of the adjusting motor and the adjusting slide block and used for driving the adjusting slide block to slide back and forth along the extending direction of the adjusting slide rail, and a reticle cylinder lifting platform connected between the adjusting slide block and the reticle cylinder and used for driving the reticle cylinder and the adjusting slide block to move synchronously; the sensor is a position sensor which is arranged between the adjusting slide rail and the reticle cylinder lifting platform and is used for detecting the initial position of the displacement of the reticle cylinder; the adjusting transmission assembly comprises a nut fixedly connected with the adjusting slide block, a screw rod which is in threaded connection with the nut and extends along the direction parallel to the measuring optical axis, a screw rod driving wheel coaxially and fixedly connected to the screw rod, and a transmission belt or a transmission chain connected between the screw rod driving wheel and an output shaft of the adjusting motor. The sensor can also adopt a displacement sensor capable of feeding back the position information of the division plate cylinder in real time.
Preferably, the rotary clamping assembly comprises a rotary body and correction pneumatic clamping jaws which are distributed around the bottom of the rotary body around the center line of the rotary body and can radially move relative to the center of the rotary body, and the correction pneumatic clamping jaws can clamp or unclamp a tested lens of a lens assembly fixedly mounted on the second lens assembly mounting seat when radially moving relative to the rotary body;
The focal plane correcting device further comprises a lifting control assembly which is connected between the rotating body and the correcting rack and used for driving the rotating body to move away from or close to the second lens assembly mounting seat, wherein the lifting control assembly comprises a correcting sliding rail which is fixedly arranged on the correcting rack and extends along the direction parallel to the correcting optical axis, a correcting sliding block which is slidingly connected on the correcting sliding rail and can slide along the direction parallel to the correcting optical axis, a correcting lifting platform which is fixedly arranged on the correcting sliding block, and a cylinder driving device which is fixedly arranged on the correcting rack and is connected with the correcting lifting platform through one end of a piston and used for driving the correcting lifting platform to move along the extending direction of the correcting optical axis; the rotary body is rotatably arranged on the correction lifting platform, and the rotary driving device comprises a correction motor arranged on the correction lifting platform and a correction transmission assembly connected between an output shaft of the correction motor and a rotary body rotating shaft and used for driving the rotary body to rotate around a correction optical axis;
the focal plane correcting device further comprises a pneumatic device which is connected with the correcting pneumatic clamping jaw to drive the correcting pneumatic clamping jaw to move radially.
Preferably, the focal plane measuring and correcting device of the lens assembly further comprises a base for installing the focal plane measuring device and the focal plane correcting device, and a feeding device arranged on the base and used for conveying the lens assembly; the feeding device comprises a Y-axis sliding rail fixedly arranged on the base and extending along the Y-axis direction, a Y-axis sliding table connected to the Y-axis sliding rail in a sliding manner, a Y-axis driving device fixedly arranged on the base and connected with the Y-axis sliding table and used for driving the Y-axis sliding table to slide along the Y-axis direction, an X-axis sliding rail fixedly arranged on the Y-axis sliding table and extending along the X-axis direction perpendicular to the Y-axis direction, an X-axis sliding table connected to the X-axis sliding rail in a sliding manner, an X-axis driving device fixedly arranged on the Y-axis sliding table and connected with the X-axis sliding table and used for driving the X-axis sliding table to slide along the X-axis direction, a Z-axis lifting table arranged above the X-axis sliding table and capable of lifting along the vertical direction perpendicular to the X-axis and the Y-axis, and a Z-axis driving device connected between the Z-axis lifting table and the X-axis sliding table and used for driving the Z-axis lifting table to move up and down along the Z-axis sliding table;
The measuring optical axis and the correcting optical axis are both in a vertical direction parallel to the Z-axis direction, and a vertical connecting line of the measuring optical axis and the correcting optical axis is parallel to the X-axis direction;
The feeding device further comprises a conveying pneumatic clamping jaw assembly which is fixedly arranged on the Z-axis lifting table and extends to the side where the measuring optical axis and the correcting optical axis are located through the Z-axis lifting table, the conveying pneumatic clamping jaw assembly is located between the focal plane measuring device and the focal plane correcting device, and the conveying pneumatic clamping jaw assembly comprises a pair of clamping jaws which can be opened and closed along the X-axis direction under the pneumatic action to clamp or loosen the focal plane measuring device and/or a lens assembly on the focal plane correcting device.
Preferably, the base is also provided with an initial installation seat positioned at the front side of the focal plane measuring device and used for placing the lens component in an initial rotation state, and a finished product installation seat positioned at the rear side of the focal plane correcting device and used for placing the lens component after debugging; the vertical central shaft of the initial installation seat, the measuring optical axis of the focal plane measuring device, the correcting optical axis of the focal plane correcting device and the vertical central shaft of the finished product installation seat are sequentially arranged at intervals along the X-axis direction parallel to the X-axis sliding rail; the feeding device further comprises an initial pneumatic clamping jaw assembly which is positioned between the initial installation seat and the focal plane correction device and used for conveying the lens assembly on the initial installation seat to the focal plane measurement device, and a finished pneumatic clamping jaw assembly which is positioned between the focal plane correction device and the finished installation seat and used for conveying the lens assembly on the focal plane correction device to the finished installation seat; the initial pneumatic jaw assembly, the delivery pneumatic jaw assembly, and the final pneumatic jaw assembly are in the same direction parallel to the X-axis.
Scheme II:
a focal plane measurement correction method is characterized in that: the method comprises the following steps:
① Measuring the reticle cylinder position of a standard lens assembly: mounting a standard lens assembly on a first lens assembly mounting seat of a focal plane measuring device, and detecting the displacement initial position of the reticle cylinder through a sensor; the method comprises the steps that a reticle adjustment driving device is controlled by a control device to drive a reticle cylinder and a reticle on the reticle cylinder to move towards a direction approaching to and away from a first lens assembly mounting seat, so that a reticle identification pattern on the reticle can form an image of the reticle identification pattern on a digital camera, the control device receives image information of each reticle identification pattern shot by the digital camera and movement distance information of a relative displacement initial position of the reticle cylinder corresponding to the image information of each reticle identification pattern fed back by the reticle adjustment driving device or a sensor, optimal movement distance information of the relative displacement initial position of the reticle cylinder corresponding to the most clear image information of the reticle is found out, and the optimal movement distance information is added with the displacement initial position of the reticle cylinder to obtain a position Z 0 of the reticle cylinder on a measuring rack;
② Measuring the position of a reticle cylinder of a lens assembly to be detected: the lens component to be detected is arranged on a first lens component mounting seat of the focal plane measuring device in a mode that the standard lens component is replaced, and then the position Z n of a reticle cylinder corresponding to the lens component to be detected on a measuring rack is measured and calculated according to the method of the step ① when the reticle identification pattern image information shot by the digital camera is the clearest;
③ Calculating focal plane position deviation delta Z n' of an imaging lens: subtracting the position Z n of the reticle cylinder corresponding to the lens assembly to be detected on the measuring frame from the position Z 0 of the reticle cylinder corresponding to the standard lens assembly on the measuring frame according to a formula DeltaZ n′＝Zn-Z0, and calculating a reticle cylinder displacement deviation value DeltaZ n ', wherein the reticle cylinder displacement deviation value DeltaZ n ' is a reticle displacement deviation value DeltaZ n ', and the reticle displacement deviation value DeltaZ n ' is equal to a focal plane position deviation value DeltaZ n ' of an imaging lens to be adjusted by the digital camera under the two conditions when the lens assembly to be detected and the standard lens assembly are respectively placed on the second lens assembly mounting seat and the reticle position is not moved;
④ Calculating a focal plane position deviation value DeltaZ n of a measured lens of the lens assembly to be detected and a measured lens of the standard lens assembly: according to an imaging relation formula DeltaZ n′＝-β2△Zn; wherein β is an magnification ratio of an optical system composed of a measured lens of the lens assembly and an imaging lens of the digital camera, β= -f '/f, wherein, -f ' is a focal length of the imaging lens, f is a focal length of the measured lens, and β 2>>1,△Zn ' is a focal plane position deviation amount of the imaging lens;
⑤ Correcting a focal plane position deviation value DeltaZ n of a tested lens of a lens assembly to be detected and a tested lens of a standard lens assembly: transferring the lens assembly to be detected to a second lens assembly mounting seat of the focal plane correcting device, and controlling a rotary driving device of the focal plane correcting device to drive a rotary clamping assembly of the measured lens for clamping the lens assembly to be detected to rotate to eliminate the focal plane position deviation delta Z n according to the focal plane position deviation delta Z n of the measured lens calculated in the step ④, so that the focal plane positions of the measured lens of the lens assembly to be detected and the measured lens of the standard lens assembly are consistent.
Preferably, in step ⑤, during adjustment, an angle ω by which a correction motor in a rotation driving device of a focal plane correction device should rotate is calculated according to a formula ω= (360×Δz)/S, where S is a lens pitch of a lens to be detected of a lens assembly to be detected; the control device controls the rotation direction and the rotation angle of the correction motor according to the calculated omega value and positive and negative, so that the correction motor drives the rotary clamping assembly to drive the tested lens to rotate by a corresponding angle relative to the lens seat, and the focal plane position deviation delta Z of the tested lens of the lens assembly to be tested and the tested lens of the standard lens assembly is eliminated.
In steps ① and ②, the moving distance information of the relative displacement initial position of the reticle cylinder can be calculated by adjusting the rotating angle of the motor and the pitch of the screw nut.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention provides a focal plane measurement and correction device and a focal plane measurement and correction method for a lens assembly.
2. The focal plane measurement and correction device and the focal plane measurement and correction method for the lens assembly can enable the focal plane of the high-definition lens after locking to be positioned more accurately, and the measurement precision can reach +/-0.02 mm, which is greatly higher than that of other methods at present. A more stable and consistent lens assembly is provided for downstream camera manufacturers to improve camera assembly throughput and production efficiency and consistency.
3. The invention also has the characteristics of reasonable structural design and convenient popularization and application.
Drawings
FIG. 1 is a schematic three-dimensional structure of a first embodiment of the present invention;
FIG. 2 is a schematic three-dimensional structure of a first embodiment of the present invention;
FIG. 3 is a schematic three-dimensional structure of a lens assembly according to the present invention;
FIG. 4 is a schematic vertical cross-sectional view of a lens assembly of the present invention;
FIG. 5 is a schematic view of a portion of a three-dimensional structure of a focal plane measuring device according to the present invention;
FIG. 6 is a schematic vertical cross-sectional view of FIG. 5;
FIG. 7 is a schematic diagram illustrating a connection relationship between a lens assembly and a first lens assembly mount according to the present invention;
FIG. 8 is a schematic view of the reticle adjustment drive and reticle cylinder of the present invention;
FIG. 9 is a schematic vertical cross-sectional view of a reticle cylinder of the present invention;
FIG. 10 is a schematic explosion diagram of a reticle adjustment drive of the present invention;
FIG. 11 is a schematic explosion diagram of a reticle adjustment drive of the present invention;
FIG. 12 is a schematic view of the transmission part of the reticle adjustment driving means of the present invention;
FIG. 13 is a schematic view of the structure of the digital camera and camera housing of the present invention;
FIG. 14 is a schematic view of a three-dimensional structure of a focal plane correcting device according to the present invention;
FIG. 15 is a schematic view of a three-dimensional structure of a focal plane correction device according to the present invention;
FIG. 16 is a three-dimensional schematic view of a focal plane correction device according to the present invention;
FIG. 17 is a schematic view of a three-dimensional structure of a feeding device according to the present invention;
FIG. 18 is a schematic diagram of a three-dimensional structure of a feeding device according to the present invention;
FIG. 19 is a schematic three-dimensional view of a feeding device according to the present invention;
FIG. 20 is a schematic view of the optical path of the focal plane measuring device of the present invention.
Description of the reference numerals: 1-lens component, 11-lens mount, 12-lens to be measured, 2-focal plane measuring device, 21-first lens component mounting seat, 211-light through hole, 212-pin hole component, 22-reticle, 23-light homogenizing plate, 24-light source device, 25-digital camera, 251-imaging lens, 252-photosensitive sensor, 26-lens mount mounting frame, 27-protective sleeve, 28-reticle cylinder, 29-reticle adjustment driving device, 291-adjustment slide rail, 292-adjustment slide block, 293-adjustment motor, 294-adjustment transmission component, 295-reticle cylinder lifting platform, 296-sensor, 210-camera frame, 2A-measurement optical axis, 3-focal plane correcting device 31-second lens component mounting base, 32-correction frame, 33-correction slide rail, 34-correction slide block, 35-correction lifting platform, 36-cylinder driving device, 37-rotation clamping component, 371-rotation body, 372-correction pneumatic clamping jaw, 38-correction motor, 39-correction transmission component, 3A-correction optical axis, 5-feeding device, 51-Z axis lifting platform, 52-Y axis slide rail, 53-Y axis slide table, 54-Y axis driving device, 55-X axis slide rail, 56-X axis slide table, 57-X axis driving device, 58-Z axis driving device, 59-conveying pneumatic clamping jaw component, 510-initial pneumatic clamping jaw component, 511-finished pneumatic clamping jaw component, 7-initial mounting base, and, 8, a finished product mounting seat.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
embodiment one:
as shown in fig. 1 to 20, a focal plane measurement correcting device for a lens assembly 1 includes a lens base 11 and a measured lens 12 screwed on the lens base 11, and is characterized in that: the focal plane measuring and correcting device of the lens assembly comprises a focal plane measuring device 2, a focal plane correcting device 3 and a control device;
The focal plane measuring device 2 comprises a measuring frame, a light source device 24, a light homogenizing plate 23, a reticle 22, a first lens assembly mounting seat 21 and a digital camera 25 which are sequentially arranged on the measuring frame along the extending direction of a measuring optical axis 2A; the reticle 22 is provided with a reticle identification pattern;
The focal plane measuring device 2 further comprises a protection barrel 27 for fixedly mounting the first lens assembly mounting seat 21 on the measuring frame, the first lens assembly mounting seat 21 is coaxially and fixedly arranged at the top of the protection barrel 27, and the protection barrel 27 is arranged at one side of the first lens assembly mounting seat 21 facing the light source device 24 along the measuring optical axis 2A direction; the lens assembly 1 is fixedly arranged on a first lens assembly mounting seat 21 through a lens seat 11 thereof, and a light transmission hole 211 extending along the direction of a measuring optical axis 2A is arranged in the middle of the first lens assembly mounting seat 21; the digital camera 25 is fixedly arranged on the other side of the first lens assembly mounting seat 21, which is away from the light source device 24, through the measuring frame, and can shoot images of the reticle identification patterns presented by the light source device 24 through the light homogenizing plate 23 and the reticle 22 after passing through the measured lens 12; the lens mount 11 and the first lens assembly mount 21 in the lens assembly 1 may be positioned and mounted by a pin hole assembly 212 as shown in fig. 7;
The focal plane measuring device 2 further comprises a reticle cylinder 28 for fixedly mounting the light source device 24, the dodging plate 23 and the reticle 22, and a reticle adjusting driving device 29 for driving the reticle cylinder 28 to move along the measuring optical axis 2A towards or away from the first lens assembly mounting seat 21; one end of the reticle cylinder 28 provided with the reticle 22 and the dodging plate 23 extends into the protection cylinder 27, and the other end of the reticle cylinder 28 extends out of the protection cylinder 27 and is connected with the reticle adjustment driving device 29; the reticle adjustment driving device 29 is also provided with a sensor 296 for detecting the position of the reticle cylinder 28;
The control device is respectively connected with the sensor 296, the reticle adjustment driving device 29 and the digital camera 25 to obtain detection signals and calculate focal plane position deviation values of the tested lens 12 of the lens assembly 1 to be detected and the tested lens 12 of the standard lens assembly 1 according to the detection signals;
The focal plane correcting device 3 comprises a correcting frame 32, a second lens component mounting seat 31 which is fixedly connected with the correcting frame 32 and is used for fixedly mounting the lens seat 11 of the lens component 1, a rotary clamping component 37 which is rotatably connected with the correcting frame 32 and is used for clamping the tested lens 12 of the lens component 1 fixedly mounted on the second lens component mounting seat 31 and driving the tested lens 12 to rotate, and a rotary driving device which is connected between the rotary clamping component 37 and the correcting frame 32 and is used for driving the rotary clamping component 37 to rotate, wherein the rotary center line of the tested lens 12 of the lens component 1 fixedly mounted on the second lens component mounting seat 31 and the rotary center line of the rotary clamping component 37 are positioned on the same correcting optical axis 3A;
The control device is connected with the rotary driving device of the focal plane correcting device 3 so as to control the rotary driving device to rotate according to the focal plane position deviation value, so that the focal plane position deviation value is eliminated, and the focal plane position of the tested lens 12 of the lens assembly 1 to be detected is consistent with that of the tested lens 12 of the standard lens assembly 1.
As shown in fig. 20, the digital camera 25 preferably includes an imaging lens 251 and a photosensitive sensor 252 sequentially arranged along the measuring optical axis 2A from a direction approaching the first lens assembly mount 21 to a direction separating from the first lens assembly mount 21; the photosensitive sensor 252 is connected to the control device for transmitting the image of the reticle discrimination pattern captured by it to the control device.
As shown in fig. 5-13, preferably, the measuring frame includes a lens mount frame 26, and a camera frame 210 fixedly mounted and connected to the lens mount frame 26, the protective cylinder 27 is fixedly mounted on the lens mount frame 26, and the digital camera 25 is fixedly mounted on the camera frame 210;
The reticle adjustment driving device 29 comprises an adjustment sliding rail 291 fixedly mounted on the mirror base mounting frame 26 and extending along the direction parallel to the measuring optical axis 2A, an adjustment sliding block 292 slidably connected to the adjustment sliding rail 291 and capable of sliding along the direction parallel to the measuring optical axis 2A relative to the adjustment sliding rail 291, an adjustment motor 293 fixedly mounted on the side wall of the adjustment sliding rail 291, an adjustment transmission assembly 294 connected between the output shaft of the adjustment motor 293 and the adjustment sliding block 292 and used for driving the adjustment sliding block 292 to reciprocally slide along the extending direction of the adjustment sliding rail 291, and a reticle cylinder lifting platform 295 connected between the adjustment sliding block 292 and the reticle cylinder 28 and used for driving the reticle cylinder 28 and the adjustment sliding block 292 to synchronously move; the sensor 296 is a position sensor provided between the adjustment slide rail 291 and the reticle cylinder elevation platform 295 for detecting the initial position of displacement of the reticle cylinder 28; the adjusting transmission assembly 294 comprises a nut fixedly connected with the adjusting slide block 292, a screw rod which is in threaded connection with the nut and extends along the direction parallel to the measuring optical axis 2A, a screw rod transmission wheel coaxially and fixedly connected to the screw rod, and a transmission belt or a transmission chain connected between the screw rod transmission wheel and an output shaft of the adjusting motor 293. The sensor 296 may also be a displacement sensor that feeds back the position information of the reticle cylinder 28 in real time.
As shown in fig. 14 to 16, the rotary clamping assembly 37 preferably comprises a rotary body 371, and corrective pneumatic clamping jaws 372 distributed around the bottom of the rotary body 371 around the center line of the rotary body 371 and capable of moving radially with respect to the center of the rotary body 371, wherein the corrective pneumatic clamping jaws 372 can clamp or unclamp a lens 12 to be tested of the lens assembly 1 fixedly mounted on the second lens assembly mount 31 when moving radially with respect to the rotary body 371;
The focal plane correcting device 3 further comprises a lifting control component connected between the rotating body 371 and the correcting frame 32 and used for driving the rotating body 371 to move away from or close to the second lens component mounting seat 31, wherein the lifting control component comprises a correcting sliding rail 33 fixedly arranged on the correcting frame 32 and extending along the direction parallel to the correcting optical axis 3A, a correcting sliding block 34 slidingly connected on the correcting sliding rail 33 and capable of sliding along the direction parallel to the correcting optical axis 3A, a correcting lifting platform 35 fixedly arranged on the correcting sliding block 34, and a cylinder driving device 36 fixedly arranged on the correcting frame 32 and connected with the correcting lifting platform 35 through one end of a piston and used for driving the correcting lifting platform 35 to move along the extending direction of the correcting optical axis 3A; the rotary body 371 is rotatably mounted on the correction lifting platform 35, and the rotation driving device comprises a correction motor 38 arranged on the correction lifting platform 35, and a correction transmission assembly 39 connected between an output shaft of the correction motor 38 and a rotating shaft of the rotary body 371 and used for driving the rotary body 371 to rotate around the correction optical axis 3A;
The focal plane correcting device 3 further comprises a pneumatic device connected with the correcting pneumatic clamping jaw 372 to drive the correcting pneumatic clamping jaw 372 to move radially.
As shown in fig. 17-19, the lens assembly focal plane measurement correcting device further preferably comprises a base for mounting the focal plane measuring device 2 and the focal plane correcting device 3, and a feeding device 5 arranged on the base for conveying the lens assembly 1; the feeding device 5 comprises a Y-axis sliding rail 52 fixedly arranged on the base and extending along the Y-axis direction, a Y-axis sliding table 53 connected to the Y-axis sliding rail 52 in a sliding manner, a Y-axis driving device 54 fixedly arranged on the base and connected with the Y-axis sliding table 53 and used for driving the Y-axis sliding table 53 to slide along the Y-axis direction relative to the Y-axis sliding rail 52, an X-axis sliding rail 55 fixedly arranged on the Y-axis sliding table 53 and extending along the X-axis direction perpendicular to the Y-axis direction, an X-axis sliding table 56 connected to the X-axis sliding rail 55 in a sliding manner, an X-axis driving device 57 fixedly arranged on the Y-axis sliding table 53 and connected with the X-axis sliding table 56 and used for driving the X-axis sliding table 56 to slide along the X-axis direction relative to the X-axis sliding rail 55, a Z-axis lifting table 51 arranged above the X-axis sliding table 56 and capable of lifting along the vertical direction perpendicular to the X-axis and a Z-axis driving device 58 connected between the Z-axis lifting table 51 and the X-axis sliding table 56 and used for driving the Z-axis lifting table 51 to move along the Z-axis sliding table 56;
the measuring optical axis 2A and the correcting optical axis 3A are both in a vertical direction parallel to the Z-axis direction, and a vertical connecting line of the measuring optical axis 2A and the correcting optical axis 3A is parallel to the X-axis direction;
the feeding device 5 further comprises a conveying pneumatic clamping jaw assembly 59 which is fixedly arranged on the Z-axis lifting table 51 and extends from the Z-axis lifting table 51 to the side where the measuring optical axis 2A and the correcting optical axis 3A are located, the conveying pneumatic clamping jaw assembly 59 is located between the focal plane measuring device 2 and the focal plane correcting device 3, and the conveying pneumatic clamping jaw assembly 59 comprises a pair of clamping jaws which can open and close along the X-axis direction under the pneumatic action to clamp or loosen the lens assembly 1 on the focal plane measuring device 2 and/or the focal plane correcting device 3.
As shown in fig. 17 to 19, an initial mounting seat 7 for placing the lens assembly 1 in an initial rotation state is preferably further arranged on the base and positioned at the front side of the focal plane measuring device 2, and a finished product mounting seat 8 for placing the lens assembly 1 after debugging is preferably arranged at the rear side of the focal plane correcting device 3; the vertical central axis of the initial installation seat 7, the measuring optical axis 2A of the focal plane measuring device 2, the correcting optical axis 3A of the focal plane correcting device 3 and the vertical central axis of the finished product installation seat 8 are sequentially arranged at intervals along the X-axis direction parallel to the X-axis sliding rail 55; the feeding device 5 further comprises an initial pneumatic clamping jaw assembly 510 positioned between the initial installation seat 7 and the focal plane correction device 3 and used for conveying the lens assembly 1 on the initial installation seat 7 to the focal plane measurement device 2, and a finished pneumatic clamping jaw assembly 511 positioned between the focal plane correction device 3 and the finished installation seat 8 and used for conveying the lens assembly 1 on the focal plane correction device 3 to the finished installation seat 8; the initial pneumatic jaw assembly 510, the transport pneumatic jaw assembly 59, and the final pneumatic jaw assembly 511 are in the same direction parallel to the X-axis.
Embodiment two:
a focal plane measurement correction method is characterized in that: the method comprises the following steps:
① Measuring the reticle cylinder position of a standard lens assembly: mounting the standard lens assembly 1 onto the first lens assembly mount 21 of the focal plane measuring device 2, detecting the displacement initial position of the reticle cylinder 28 by the sensor 296; the reticle adjustment driving device 29 is controlled by the control device to drive the reticle cylinder 28 and the reticle 22 on the reticle cylinder 28 to move towards and away from the first lens assembly mounting seat 21, so that the reticle identification pattern on the reticle cylinder 22 can form an image of the reticle identification pattern on the digital camera 25, the control device receives the image information of each reticle identification pattern shot by the digital camera 25 and the movement distance information of the relative displacement initial position of the reticle cylinder 28 corresponding to the image information of each reticle identification pattern fed back by the reticle adjustment driving device 29 or the sensor 296, the optimal movement distance information of the relative displacement initial position of the reticle cylinder 28 corresponding to the most clear image information of the reticle identification pattern is found, and the position Z 0 of the reticle cylinder 28 on the measuring frame is obtained by adding the optimal movement distance information and the displacement initial position of the reticle cylinder 28;
② Measuring the position of a reticle cylinder of a lens assembly to be detected: the lens assembly 1 to be detected is arranged on the first lens assembly mounting seat 21 of the focal plane measuring device 2 in a mode that the standard lens assembly 1 is replaced, and then the position Z n of the reticle cylinder 28 corresponding to the lens assembly 1 to be detected on the measuring rack is measured and calculated according to the method of the step ① when the reticle identification pattern image information shot by the digital camera 25 is the clearest;
③ Calculating focal plane position deviation delta Z n' of an imaging lens: according to the formula DeltaZ n′＝Zn-Z0, subtracting the position Z n of the reticle cylinder 28 corresponding to the lens assembly 1 to be detected on the measuring frame from the position Z 0 of the reticle cylinder 28 corresponding to the standard lens assembly 1 on the measuring frame, and calculating a reticle cylinder displacement deviation value DeltaZ n ', wherein the reticle cylinder displacement deviation value DeltaZ n ' is a reticle displacement deviation value DeltaZ n ', and the reticle displacement deviation value DeltaZn ' is equal to a focal plane position deviation value DeltaZn ' of the imaging lens 251 to be adjusted by the digital camera 25 under the two conditions when the lens assembly 1 to be detected and the standard lens assembly 1 are respectively placed on the second lens assembly mounting seat 31 and the position of the reticle 22 is not moved;
④ Calculating a focal plane position deviation value DeltaZ n of the tested lens 12 of the lens assembly 1 to be detected and the tested lens 12 of the standard lens assembly 1: according to an imaging relation formula DeltaZ n′＝-β2△Zn; where β is the magnification of an optical system composed of the measured lens 12 of the lens assembly 1 and the imaging lens 251 of the digital camera 25, β= -f '/f, where-f ' is the focal length of the imaging lens 251, f is the focal length of the measured lens 12, and β 2>>1,△Zn ' is the focal plane position deviation amount of the imaging lens;
⑤ Correcting a focal plane position deviation value DeltaZ n of a tested lens 12 of a lens assembly to be detected and a tested lens 12 of a standard lens assembly: the lens assembly 1 to be detected is transferred to the second lens assembly mounting seat 31 of the focal plane correcting device 3, and the control device controls the rotation driving device of the focal plane correcting device 3 to drive the rotation clamping assembly 37 of the measured lens 12 for clamping the lens assembly 1 to be detected to rotate to eliminate the focal plane position deviation value DeltaZ n relative to the lens seat 11 according to the focal plane position deviation value DeltaZ n of the measured lens 12 calculated in the step ④, so that the focal plane position of the measured lens 12 of the lens assembly to be detected is consistent with that of the measured lens 12 of the standard lens assembly.
Preferably, during the adjustment in step ⑤, the angle ω by which the correction motor 38 in the rotation driving device of the focal plane correction device 3 should rotate is calculated according to the formula ω= (360×Δz)/S, where S is the lens pitch of the lens 12 to be detected of the lens assembly 1 to be detected; the control device controls the rotation direction and rotation angle of the correction motor 38 according to the calculated omega value and positive and negative, so that the correction motor 38 drives the rotary clamping assembly 37 to drive the measured lens 12 to rotate relative to the lens base 12 by a corresponding angle, and the deviation DeltaZ of the focal plane position of the measured lens 12 of the lens assembly 1 to be detected and the measured lens 12 of the standard lens assembly 1 is eliminated.
In steps ① and ②, the movement distance information of the relative displacement initial position of the reticle cylinder 28 can be calculated by adjusting the rotation angle of the motor 293 and the pitch of the lead screw nut.
While the invention has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be appreciated that various changes and modifications can be made therein without departing from the spirit of the invention. It is, therefore, to be understood that the invention is not to be in any way limited except by the appended claims and their equivalents.
Claims (7)
1. The utility model provides a camera lens subassembly focal plane measurement orthotic devices, camera lens subassembly (1) are including lens mount (11) and threaded connection on lens mount (11) by measuring camera lens (12), its characterized in that: the focal plane measuring and correcting device of the lens assembly comprises a focal plane measuring device (2), a focal plane correcting device (3) and a control device;
The focal plane measuring device (2) comprises a measuring rack, a light source device (24), a light homogenizing plate (23), a reticle (22), a first lens component mounting seat (21) and a digital camera (25), wherein the light source device (24), the light homogenizing plate (23), the reticle (22), the first lens component mounting seat and the digital camera (25) are sequentially arranged on the measuring rack along the extending direction of a measuring optical axis (2A); a reticle discrimination pattern is provided on the reticle (22);
The focal plane measuring device (2) further comprises a protection cylinder (27) for enabling the first lens component mounting seat (21) to be fixedly mounted on the measuring rack, the first lens component mounting seat (21) is coaxially and fixedly arranged at the top of the protection cylinder (27), and the protection cylinder (27) is arranged on one side, facing the light source device (24), of the first lens component mounting seat (21) along the direction of the measuring optical axis (2A); the lens assembly (1) is fixedly arranged on a first lens assembly mounting seat (21) through a lens seat (11), and a light transmission hole (211) extending along the direction of a measuring optical axis (2A) is formed in the middle of the first lens assembly mounting seat (21); the digital camera (25) is fixedly arranged on the other side of the first lens assembly mounting seat (21) which is away from the light source device (24) through the measuring frame, and can shoot images of the reticle identification patterns presented by the measured lens (12) after the light source device (24) passes through the light homogenizing plate (23) and the reticle (22);
The focal plane measuring device (2) further comprises a reticle cylinder (28) used for fixedly mounting the light source device (24), the dodging plate (23) and the reticle (22), and a reticle adjusting driving device (29) used for driving the reticle cylinder (28) to move along the measuring optical axis (2A) towards a direction approaching or far away from the first lens assembly mounting seat (21); one end of the reticle cylinder (28) provided with the reticle (22) and the dodging plate (23) extends into the protection cylinder (27), and the other end of the reticle cylinder (28) extends out of the protection cylinder (27) to be connected with the reticle adjusting driving device (29); the reticle adjustment driving device (29) is also provided with a sensor (296) for detecting the position of the reticle cylinder (28);
The control device is respectively connected with the sensor (296), the reticle adjustment driving device (29) and the digital camera (25) to acquire detection signals and calculate focal plane position deviation values of a detected lens (12) of the lens assembly (1) to be detected and a detected lens (12) of the standard lens assembly (1) according to the detection signals;
The focal plane correcting device (3) comprises a correcting rack (32), a second lens component mounting seat (31) which is fixedly connected with the correcting rack (32) and is used for fixedly mounting a lens seat (11) of the lens component (1), a rotation clamping component (37) which is rotatably connected with the correcting rack (32) and is used for clamping a tested lens (12) of the lens component (1) fixedly mounted on the second lens component mounting seat (31) and driving the tested lens (12) to rotate, and a rotation driving device which is connected between the rotation clamping component (37) and the correcting rack (32) and is used for driving the rotation clamping component (37) to rotate, wherein the rotation center line of the tested lens (12) of the lens component (1) fixedly mounted on the second lens component mounting seat (31) and the rotation clamping component (37) are positioned on the same correcting optical axis (3A);
the control device is connected with the rotary driving device of the focal plane correcting device (3) so as to control the rotary driving device to rotate according to the focal plane position deviation value, so that the focal plane position deviation value is eliminated, and the focal plane position of the tested lens (12) of the lens assembly (1) to be detected is consistent with that of the tested lens (12) of the standard lens assembly (1);
The measuring rack comprises a lens seat mounting rack (26) and a camera rack (210) fixedly connected with the lens seat mounting rack (26), the protection cylinder (27) is fixedly arranged on the lens seat mounting rack (26), and the digital camera (25) is fixedly arranged on the camera rack (210);
The reticle adjustment driving device (29) comprises an adjustment slide rail (291) fixedly mounted on the mirror base mounting frame (26) and extending along the direction parallel to the measuring optical axis (2A), an adjustment slide block (292) which is slidably connected to the adjustment slide rail (291) and can slide along the direction parallel to the measuring optical axis (2A), an adjustment motor (293) fixedly mounted on the side wall of the adjustment slide rail (291), an adjustment transmission assembly (294) connected between the output shaft of the adjustment motor (293) and the adjustment slide block (292) and used for driving the adjustment slide block (292) to slide reciprocally along the extending direction of the adjustment slide rail (291), and a reticle cylinder lifting platform (295) connected between the adjustment slide block (292) and the reticle cylinder (28) and used for driving the reticle cylinder (28) and the adjustment slide block (292) to move synchronously; the sensor (296) is a position sensor arranged between the adjusting slide rail (291) and the reticle cylinder lifting platform (295) and used for detecting the initial position of displacement of the reticle cylinder (28); the adjusting transmission assembly (294) comprises a nut fixedly connected with the adjusting slide block (292), a screw rod which is in threaded connection with the nut and extends along the direction parallel to the measuring optical axis (2A), a screw rod transmission wheel coaxially and fixedly connected to the screw rod, and a transmission belt or a transmission chain connected between the screw rod transmission wheel and an output shaft of the adjusting motor (293).
2. The lens assembly focal plane measurement orthotic device of claim 1, wherein: the digital camera (25) comprises an imaging lens (251) and a photosensitive sensor (252) which are sequentially arranged along a measuring optical axis (2A) from a direction close to the first lens assembly mounting seat (21) to a direction far away from the first lens assembly mounting seat (21); a light sensor (252) is connected to the control device for transmitting the captured image of the reticle identification pattern to the control device.
3. The lens assembly focal plane measurement orthotic device of claim 1, wherein: the rotary clamping assembly (37) comprises a rotary body (371), and correction pneumatic clamping jaws (372) which are distributed around the bottom of the rotary body (371) around the center line of the rotary body (371) and can radially move relative to the center of the rotary body (371), and the correction pneumatic clamping jaws (372) can clamp or unclamp a tested lens (12) of a lens assembly (1) fixedly mounted on the second lens assembly mounting seat (31) when radially moving relative to the rotary body (371);
the focal plane correction device (3) further comprises a lifting control component which is connected between the rotating body (371) and the correction rack (32) and used for driving the rotating body (371) to move away from or close to the second lens component mounting seat (31), wherein the lifting control component comprises a correction sliding rail (33) which is fixedly arranged on the correction rack (32) and extends along the direction parallel to the correction optical axis (3A), a correction sliding block (34) which is slidingly connected on the correction sliding rail (33) and can slide along the direction parallel to the correction optical axis (3A), a correction lifting platform (35) which is fixedly arranged on the correction sliding block (34), and a cylinder driving device (36) which is fixedly arranged on the correction rack (32) and is connected with the correction lifting platform (35) through one end of a piston and used for driving the correction lifting platform (35) to move along the extension direction of the correction optical axis (3A); the rotary body (371) is rotatably mounted on the correction lifting platform (35), and the rotary driving device comprises a correction motor (38) arranged on the correction lifting platform (35) and a correction transmission assembly (39) connected between an output shaft of the correction motor (38) and a rotary shaft of the rotary body (371) and used for driving the rotary body (371) to rotate around the correction optical axis (3A);
The focal plane correcting device (3) further comprises a pneumatic device which is connected with the correcting pneumatic clamping jaw (372) to drive the correcting pneumatic clamping jaw (372) to move radially.
4. The lens assembly focal plane measurement orthotic device of claim 1, wherein: the lens assembly focal plane measurement correcting device further comprises a base for installing the focal plane measuring device (2) and the focal plane correcting device (3) and a feeding device (5) arranged on the base and used for conveying the lens assembly (1); the feeding device (5) comprises a Y-axis sliding rail (52) fixedly arranged on the base and extending along the Y-axis direction, a Y-axis sliding table (53) fixedly arranged on the Y-axis sliding rail (52) and connected with the Y-axis sliding table (53) in a sliding manner, a Y-axis driving device (54) fixedly arranged on the Y-axis sliding table (53) and extending along the X-axis direction perpendicular to the Y-axis direction, an X-axis sliding rail (55) fixedly arranged on the Y-axis sliding table (53) and extending along the X-axis direction, an X-axis sliding table (56) connected on the X-axis sliding rail (55) in a sliding manner, an X-axis driving device (57) fixedly arranged on the Y-axis sliding table (53) and connected with the X-axis sliding table (56) and used for driving the X-axis sliding table (56) to slide along the X-axis direction, a Z-axis lifting table (51) arranged above the X-axis sliding table (56) and capable of lifting along the vertical direction perpendicular to the X-axis and the Y-axis, and a Z-axis driving device (58) connected between the Z-axis lifting table (51) and the X-axis sliding table (56) and used for driving the Z-axis lifting device to move along the Z-axis;
The measuring optical axis (2A) and the correcting optical axis (3A) are both in a vertical direction parallel to the Z-axis direction, and a vertical connecting line of the measuring optical axis (2A) and the correcting optical axis (3A) is parallel to the X-axis direction;
The feeding device (5) further comprises a conveying pneumatic clamping jaw assembly (59) which is fixedly arranged on the Z-axis lifting table (51) and extends to the side where the measuring optical axis (2A) and the correcting optical axis (3A) are located through the Z-axis lifting table (51), the conveying pneumatic clamping jaw assembly (59) is located between the focal plane measuring device (2) and the focal plane correcting device (3), and the conveying pneumatic clamping jaw assembly (59) comprises a pair of clamping jaws which can be opened and closed along the X-axis direction under pneumatic action to clamp or loosen the focal plane measuring device (2) and/or the lens assembly (1) on the focal plane correcting device (3).
5. The lens assembly focal plane measurement and correction device of claim 4, wherein: an initial installation seat (7) positioned at the front side of the focal plane measuring device (2) and used for placing the lens assembly (1) in an initial rotation state and a finished product installation seat (8) positioned at the rear side of the focal plane correcting device (3) and used for placing the lens assembly (1) after debugging are also arranged on the base; the vertical central shaft of the initial installation seat (7), the measuring optical axis (2A) of the focal plane measuring device (2), the correcting optical axis (3A) of the focal plane correcting device (3) and the vertical central shaft of the finished product installation seat (8) are sequentially arranged at intervals along the X-axis direction parallel to the X-axis sliding rail (55); the feeding device (5) further comprises an initial pneumatic clamping jaw assembly (510) which is positioned between the initial installation seat (7) and the focal plane correction device (3) and used for conveying the lens assembly (1) on the initial installation seat (7) to the focal plane measurement device (2), and a finished pneumatic clamping jaw assembly (511) which is positioned between the focal plane correction device (3) and the finished installation seat (8) and used for conveying the lens assembly (1) on the focal plane correction device (3) to the finished installation seat (8); the initial pneumatic jaw assembly (510), the delivery pneumatic jaw assembly (59) and the final pneumatic jaw assembly (511) are in the same direction parallel to the X-axis.
6. A focal plane measurement and correction method for focal plane measurement and correction using the lens assembly focal plane measurement and correction device according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
① Measuring the reticle cylinder position of a standard lens assembly: mounting a standard lens assembly (1) on a first lens assembly mounting seat (21) of a focal plane measuring device (2), and detecting a displacement initial position of a reticle cylinder (28) through a sensor (296); the reticle adjustment driving device (29) is controlled by the control device to drive the reticle cylinder (28) and the reticle (22) on the reticle cylinder to move towards a direction approaching to and away from the first lens assembly mounting seat (21), so that the reticle identification pattern on the reticle (22) can form an image of the reticle identification pattern on the digital camera (25), the control device receives the image information of each reticle identification pattern shot by the digital camera (25) and the movement distance information of the relative displacement initial position of the reticle cylinder (28) corresponding to the image information of each reticle identification pattern fed back by the reticle adjustment driving device (29) or the sensor (296), and the optimal movement distance information of the relative displacement initial position of the reticle cylinder (28) corresponding to the most clear image information of the reticle identification pattern is found out, and the position Z 0 of the reticle cylinder (28) on the measuring frame is obtained by adding the optimal movement distance information and the displacement initial position of the reticle cylinder (28);
② Measuring the position of a reticle cylinder of a lens assembly to be detected: the lens assembly (1) to be detected is arranged on a first lens assembly mounting seat (21) of the focal plane measuring device (2) in a mode that the standard lens assembly (1) is replaced, and then the position Z n of a reticle cylinder (28) corresponding to the lens assembly (1) to be detected on a measuring rack is measured and calculated according to the method of the step ① when the reticle identification pattern image information shot by the digital camera (25) is the clearest;
③ Calculating focal plane position deviation delta Z n' of an imaging lens: according to a formula DeltaZ n′= Zn- Z0, subtracting the position Z n of a reticle cylinder (28) corresponding to a lens assembly (1) to be detected on a measuring rack from the position Z 0 of the reticle cylinder (28) corresponding to a standard lens assembly (1) on the measuring rack, and calculating a reticle cylinder displacement deviation value DeltaZ n ', wherein the reticle cylinder displacement deviation value DeltaZ n ' is a reticle displacement deviation value DeltaZ n ', and the reticle displacement deviation value DeltaZn ' is equal to the focal plane position deviation value DeltaZn ' of an imaging lens (251) to be adjusted by a digital camera (25) when the lens assembly (1) to be detected and the standard lens assembly (1) are respectively placed on a second lens assembly mounting seat (31) and the position of the reticle (22) is not moved;
④ Calculating a focal plane position deviation value DeltaZ n of a tested lens (12) of the lens assembly (1) to be detected and a tested lens (12) of the standard lens assembly (1): according to an imaging relation formula DeltaZ n′= -β²△Zn; wherein β is an enlargement ratio of an optical system composed of a measured lens (12) of the lens assembly (1) and an imaging lens (251) of the digital camera (25), β= -f '/f, wherein, -f ' is a focal length of the imaging lens (251), f is a focal length of the measured lens (12), and β > > 1, Δz n ' is a focal plane position deviation amount of the imaging lens;
⑤ Correcting focal plane position deviation value DeltaZ n of a tested lens (12) of a lens assembly to be detected and a tested lens (12) of a standard lens assembly: transferring the lens assembly (1) to be detected onto a second lens assembly mounting seat (31) of the focal plane correcting device (3), wherein the control device controls a rotary driving device of the focal plane correcting device (3) to drive a rotary clamping assembly (37) of the measured lens (12) for clamping the lens assembly (1) to be detected to rotate to eliminate the focal plane position deviation value DeltaZ n relative to the lens base (11) according to the focal plane position deviation value DeltaZ n of the measured lens (12) calculated in the step ④, so that the focal plane position of the measured lens (12) of the lens assembly to be detected is consistent with that of the measured lens (12) of the standard lens assembly.
7. The focal plane measurement correction method of claim 6, wherein: in step ⑤, firstly, according to the formula ω= (360×Δz)/S, calculating an angle ω by which the correction motor (38) in the rotation driving device of the focal plane correction device (3) should rotate, where S is a lens pitch of the measured lens (12) of the lens assembly (1) to be detected; the control device controls the rotation direction and the rotation angle of the correction motor (38) according to the calculated omega value and positive and negative, so that the correction motor (38) drives the rotary clamping assembly (37) to drive the tested lens (12) to rotate relative to the lens base (11) by a corresponding angle, and the deviation DeltaZ of the focal plane position of the tested lens (12) of the lens assembly (1) to be tested and the focal plane position of the tested lens (12) of the standard lens assembly (1) is eliminated.
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