CN108732780B - Automatic optical lens adjusting device and method - Google Patents
Automatic optical lens adjusting device and method Download PDFInfo
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- CN108732780B CN108732780B CN201810587097.9A CN201810587097A CN108732780B CN 108732780 B CN108732780 B CN 108732780B CN 201810587097 A CN201810587097 A CN 201810587097A CN 108732780 B CN108732780 B CN 108732780B
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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Abstract
The invention provides an automatic optical lens assembling and adjusting device and method, which can realize automatic clamping and centering and adjusting of various optical devices. The automatic optical lens assembling device integrates alignment and centering assembly of an optical lens, and comprises a clamping and to-be-assembled part, a feeding module, a clamping module, a coaxial alignment module, an optical centering module and an auxiliary module. The modules can be used independently or jointly, the application range of precision optical part assembly is expanded, and the system has the characteristics of man-machine cooperation and reconfiguration. According to the adjusting method of the automatic optical lens adjusting device, the lens is imaged on a CCD camera of an autocollimator through the cross reticle, the lens center deviation error and the lens interval are obtained, the lens center deviation error is eliminated through pose adjustment, and the assembling precision of the lens and the lens cone is further improved.
Description
Technical Field
The invention relates to the technical field of optical systems and electromechanics, in particular to an automatic optical lens adjusting device and method.
Background
With the rapid development of optical technology and the demands of people in production and life, the application field of the optical lens is wider and wider, the optical lens is as large as aiming and positioning equipment in the aerospace field and as small as a photographing and shooting lens in the smart phone field, and the optical lens is ubiquitous. The optical performance of the optical lens depends greatly on the adjustment accuracy of the optical lens, and the adjustment of the optical lens must have high reliability in order to ensure optical resolution and accuracy. Aiming at the installation and adjustment of the precise optical lens, at present, most of domestic methods still adopt the traditional installation and adjustment method, and the manual installation and adjustment is carried out by depending on operators. This method is awkward and inefficient, and the efficiency of the setup depends to a large extent on the experience of the operator. In order to improve the efficiency and precision of the precision optical lens in the assembling and adjusting process, an automatic high-precision assembling and adjusting device is urgently needed.
For optical lens accommodation, the most important subject parts are the lens barrel, the lens and the spacer. The optical lens is simply assembled by placing the lens and the spacer into the lens barrel one by one, safely and reliably. The optical system is far from enough, the mechanical axes of the lens barrel, the lens and the space ring are overlapped and cannot ensure the optical performance of the lens, and the position and pose of the lens and the space ring are required to be adjusted, so that the coaxiality of the optical axis of the lens and the reference axis of the optical system reaches certain precision. The whole process is the centering and adjusting process of the optical lens.
At the present stage, the installation method or apparatus related to the centering installation of the optical lens has the following items:
1. the application number CN201611142425.1 is named as a double-optical-wedge centering and adjusting method, and discloses a double-optical-wedge centering and adjusting method. However, the optical path of the double optical wedges is difficult to debug in practice, the precision is difficult to guarantee, the application range of the debugging method is limited, and the technical popularization is difficult.
2. The invention discloses an assembly and adjustment method based on a catadioptric infrared imaging optical system, which is CN201611121714.3, solves the problem that unit optical elements cannot be quantified in the assembly and adjustment process of the existing infrared optical system, and can quickly, effectively and accurately realize the assembly and adjustment of the catadioptric infrared imaging optical system. However, this method is only for the infrared optical system, and has no versatility for most optical systems, and there are many reflectors and transmission mirrors, and the internal optical system is complicated, which greatly increases the installation and adjustment cost of the optical system.
3. The invention discloses an optical lens auxiliary adjusting device, which is called an optical lens auxiliary adjusting device under the name of application number CN201410115050.4, solves the technical problems of low precision and high cost of detecting the center deviation error and the lens interval of an optical lens respectively in the prior art, and improves the optical lens adjusting efficiency. However, this device requires manual insertion of the lens into the barrel before adjustment of the lens, which reduces efficiency and does not involve assembly of the spacer.
Moreover, most of the current adjusting devices or adjusting methods for optical lenses only perform centering adjustment on a single lens, and are difficult to adjust optical lenses with a plurality of lenses and space rings, and some of the adjusting devices or adjusting methods need manual assistance. Therefore, the conventional optical lens assembling device cannot realize the assembling of the multi-lens and the spacer, has low universality and is difficult to realize automatic assembly.
Disclosure of Invention
In view of this, the present invention provides an automatic optical lens adjusting device and method, which can achieve automatic clamping and centering adjustment of various optical devices.
The invention is realized by the following technical scheme:
the invention discloses an automatic assembling and adjusting device for an optical lens, which realizes the assembling and adjusting of an assembly part to be assembled and a lens cone and comprises a control module, an auxiliary module, a feeding module, a clamping module, a coaxial alignment module and an optical centering module;
the part to be assembled comprises a lens and a space ring;
the auxiliary module is used for providing structural support for the device;
the feeding module is used for moving the piece to be assembled to a set position for clamping by the clamping module;
the clamping module clamps and conveys the part to be assembled to the upper part of the lens cone clamped by the optical centering module through the part to be assembled clamp;
the coaxial alignment module is used for measuring the position and posture deviation of the to-be-assembled part and the end face of the lens barrel to the bitmap and sending the position and posture deviation to the control module;
the optical centering module is used for measuring the lens center deviation error and sending the lens center deviation error to the control module;
the control module is used for controlling the movement of the feeding module and the clamping module; adjusting the pose of the clamping module through the pose deviation measured by the coaxial alignment module to coaxially align the assembly part to be assembled with the lens barrel; and adjusting the position and posture of the lens barrel through the lens center deviation error measured by the optical centering module to enable the lens and the lens barrel to be coaxially aligned.
The feeding module comprises a feeding linear motion platform and a to-be-assembled part placing platform; the to-be-assembled part placing table is used for carrying the lens placing unit and the space ring placing unit, and the to-be-assembled part placing table moves along the feeding linear motion table under the control of the control module.
The lens placing unit is provided with two electric claws, and the two electric claws move the lens under the control of the control module, so that the centering of the lens and the lens clamp is realized, and the lens clamp is ensured to clamp the lens at the same position; the hole used for placing the space ring on the space ring placing unit is a step hole with more than two stages and is used for being matched with space rings with different sizes.
The clamping module comprises a horizontal linear motion platform, a vertical linear motion platform, an XY plane adjusting platform and a clamp of a part to be assembled; the control module controls the fixture of the part to be assembled to move in the X and Z directions along the horizontal linear motion platform and the vertical linear motion platform respectively, and controls the XY plane adjusting platform to realize the position adjustment of the fixture of the part to be assembled in the XY plane; the to-be-assembled part clamp is used for clamping the to-be-assembled part.
The part to be assembled comprises a lens adsorption clamp and a space ring adsorption clamp, and force sensors are arranged above the lens adsorption clamp and the space ring adsorption clamp.
Wherein, the part of the lens adsorption clamp contacting with the lens is in a circular arc structure; the adsorption head of the space ring clamp is provided with an electric three-jaw, and the control module controls the movement of the electric three-jaw of the adsorption head to realize the adsorption of space rings with different sizes in a stroke range.
The coaxial alignment module comprises an XYZ alignment adjusting table, an image acquisition unit, a prism pose adjusting mechanism, a light source and a prism; the XYZ contraposition adjusting platform is used for pose adjustment and auxiliary focusing of the image acquisition unit; the image acquisition unit is used for acquiring end face alignment images of the to-be-assembled part and the lens barrel; the prism adjusting mechanism is used for adjusting and locking the pose of the prism; the light source provides light rays during image acquisition; the prism is used for changing the light path, so that the image acquisition unit can acquire images of the upper part and the lower part.
The image acquisition unit adopts a microscope lens and a CCD camera, the light source adopts an annular light source, and the prism adopts a cubic prism.
The optical centering module comprises an air-floating rotary table, an autocollimator and an autocollimator vertical linear motion table; the air-floating rotary table comprises a lens cone clamp, a four-dimensional adjusting platform and an air-floating bearing, wherein the lens cone clamp is used for clamping lens cones with different diameters, the four-dimensional adjusting platform is used for adjusting the pose of the lens cones under the control of the control module, and the air-floating bearing is used for realizing the rotary motion in the eccentric measurement process; the autocollimator vertically moves along the autocollimator vertical linear motion table to realize the measurement of lens center deviation error and lens surface interval.
The device comprises a lens barrel, a float turntable, a dial indicator adsorption plate, a float turntable, a float table and a float table, wherein the float table adsorption plate is used for adsorbing the dial indicator, and the coaxiality of the axis of the excircle outline of the lens barrel and the rotating shaft of the float turntable is adjusted in.
Has the advantages that:
the automatic optical lens assembling device integrates alignment and centering assembly of an optical lens, and comprises a clamping and to-be-assembled part, a feeding module, a clamping module, a coaxial alignment module, an optical centering module and an auxiliary module.
The modules in the automatic optical lens adjusting device can be used independently or jointly, the application range of precision optical part assembly is expanded, and the automatic optical lens adjusting device has the characteristics of man-machine cooperation and reconfiguration.
According to the adjusting method of the automatic optical lens adjusting device, the lens is imaged on a CCD camera of an autocollimator through the cross reticle, the lens center deviation error and the lens interval are obtained, the lens center deviation error is eliminated through pose adjustment, and the assembling precision of the lens and the lens cone is further improved.
Drawings
FIG. 1 is a schematic diagram of an automatic optical lens adjusting device according to the present invention;
the device comprises a support module, a positioning module, a clamping module, a coaxial alignment module and an optical centering module, wherein the support module comprises 1-1-an auxiliary module, 1-2-a feeding module, 1-3-a clamping module, 1-4-a coaxial alignment module and 1-5-an optical centering module;
FIG. 2 is a schematic view of a feeding module of the automatic optical lens adjusting device according to the present invention;
2-1-a feeding linear motion table, 2-2-a lens arrangement unit, 2-3-a spacer ring arrangement unit, 2-4-a dial indicator adsorption plate and 2-5-a to-be-assembled part;
FIG. 3 is a schematic view of a clamping module of the automatic optical lens adjusting device according to the present invention;
wherein, 3-1-horizontal linear motion platform, 3-2-vertical linear motion platform, 3-3-XY plane adjusting platform, 3-4-lens clamp, 3-5-spacer clamp;
FIG. 4 is a schematic diagram of a coaxial alignment module of the automatic optical lens adjusting device according to the present invention;
the system comprises a 4-1-XYZ alignment adjusting platform, a 4-2-image acquisition unit, a 4-3-prism pose adjusting mechanism, a 4-light source and a 4-5-prism, wherein the X, Y and Z are respectively arranged on a light source and a light source;
FIG. 5 is a schematic view of an optical centering module of the automatic optical lens adjusting device according to the present invention;
wherein, 5-1-air-float rotary table, 5-2-autocollimator, 5-3-autocollimator vertical linear motion table;
fig. 6 is a flowchart of the adjusting method of the automatic optical lens adjusting device according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
The invention provides an automatic optical lens adjusting device and method.
The automatic optical lens adjusting device comprises the following components:
the structure of the automatic optical lens adjusting device of the invention is shown in fig. 1. And establishing an OXXYZ coordinate system by taking the center of a plane where the device is located as an origin, and defining an OXY plane as a horizontal plane and an OXZ plane as a vertical plane. The automatic optical lens assembling and adjusting device comprises a control module, an auxiliary module 1-1, a feeding module 1-2, a clamping module 1-3, a coaxial alignment module 1-4 and an optical centering module 1-5, wherein under the control of the control module, the assembling and adjusting of an assembly part 2-5 to be assembled and a lens cone are completed through the coordination and cooperation of the modules; the parts to be assembled 2-5 comprise lenses and spacers.
The auxiliary modules 1-1 are used for providing reliable structural support and an air path system, and comprise a portal frame, a marble base, an air path system and a base support structure, wherein the portal frame is used for supporting each module of the system, the marble base and the base support structure are used for supporting the whole system, and the air path system is used for controlling adsorption and release of the adsorption clamp.
The feeding module 1-2 is used for moving the piece to be assembled to a set position for clamping by the clamping module (1-3); FIG. 2 is a schematic view of a feeding module 1-2; the feeding module 1-2 comprises a feeding linear motion platform 2-1 and a to-be-assembled part placing platform; the feeding linear motion platform 2-1 is arranged along the Y direction; the to-be-assembled part placing table is provided with a lens placing unit 2-2 and a space ring placing unit 2-3 and is used for placing the to-be-assembled part 2-5, and the to-be-assembled part placing table moves along the feeding linear motion table 2-1 under the control of the control module; the lens mounting unit 2-2 is provided with two electric claws, the control module controls the two electric claws to move so as to realize the centering of the lens and the lens clamp, and the lens clamp can clamp the lens at the same position; the holes for placing the space rings on the space ring placing units 2-3 are more than two stages of step holes and are used for being matched with space rings with different sizes to ensure the placing positions of the space rings.
The clamping module 1-3 clamps and conveys the part to be assembled to the upper part of the lens cone clamped by the optical centering module through the part to be assembled clamp; FIG. 3 is a schematic view of a clamping module 1-3; the clamping module 1-3 comprises a horizontal linear motion platform 3-1, a vertical linear motion platform 3-2, an XY plane adjusting platform 3-3 and a clamp of a part to be assembled; the control module controls the fixture of the assembly part to be assembled to move (roughly adjusted) along the X and Z directions of the horizontal linear motion table 3-1 and the vertical linear motion table 3-2 respectively); the jig of the assembly part to be assembled realizes the precise adjustment (micron level) of the position of the XY plane through an XY plane adjusting table 3-3; the to-be-assembled part clamp comprises a lens adsorption clamp 3-4 and a space ring adsorption clamp 3-5 which are adsorption type clamps, the part of the lens adsorption clamp 3-4, which is in contact with the lens, is of an arc-shaped structure and can adsorb lenses with different diameters and shapes, an adsorption head of the space ring clamp 3-5 is provided with an electric three-jaw, and a control module controls the movement of the electric three-jaw of the adsorption head to realize the adsorption of space rings with different sizes in a stroke range.
The coaxial alignment module 1-4 is used for measuring the pose deviation of the bitmap of the assembly parts to be assembled and the end surfaces of the lens barrel and sending the pose deviation to the control module; FIG. 4 is a schematic view of a coaxial alignment module 1-4, wherein the coaxial alignment module 1-4 comprises an XYZ alignment adjustment stage 4-1, an image acquisition unit 4-2, a prism pose adjustment mechanism 4-3, a light source 4-4, and a prism 4-5; the XYZ alignment adjusting table 4-1 is used for pose adjustment and auxiliary focusing of the image acquisition unit 4-2; the image acquisition unit 4-2 is used for acquiring end face alignment images of the to-be-assembled part and the lens barrel; the prism adjusting mechanism 4-3 is used for adjusting and locking the pose of the prism; the light source 4-4 provides light rays during image acquisition, so that clearer images can be acquired; the prism 4-5 is used for changing the light path, so that the image acquisition unit 4-2 can acquire images of the upper part and the lower part. The image acquisition unit in the embodiment adopts a microscope lens and a high-resolution CCD camera (a 12-time zoom microscope lens and a 500-ten-thousand-pixel CCD camera), the light source adopts an annular light source, and the prism adopts a cubic prism, so that the image can be better obtained.
FIG. 5 is a schematic diagram of an optical centering module 1-5 for measuring lens decentration errors and sending them to a control module. The optical centering module comprises an air-floating rotary table 5-1, an autocollimator 5-2 and an autocollimator vertical linear motion table 5-3;
the air-floating rotary table 5-1 comprises a three-jaw clamp, a four-dimensional adjusting platform and an air-floating bearing, wherein the three-jaw clamp is used for clamping lens barrels with different diameters, a three-jaw chuck can be adopted as the three-jaw clamp, the four-dimensional adjusting platform finishes pose adjustment of the lens barrels, and the air-floating bearing realizes rotary motion in the eccentric measurement process;
the autocollimator 5-2 vertically moves along the autocollimator vertical linear motion table 5-3, the autocollimator 5-2 emits collimated light, a required optical image is searched, and measurement of lens center deviation error and lens surface interval is achieved, wherein the main function of measuring the lens surface interval is to retest a lens, and if the lens surface interval does not meet requirements, a spacer ring needs to be polished.
The automatic optical lens assembling and adjusting device further comprises a dial indicator adsorption plate 2-4 used for adsorbing a dial indicator, and adjusting the coaxiality of the axis of the excircle profile of the lens cone and the rotating shaft of the air floatation rotary table 5-1 to reach required precision in a dial indicator beating mode, so that the parallelism of the excircle end face of the lens cone and the parallelism of the upper surface of the marble base reach required precision.
The control module is used for controlling the movement of the feeding module (1-2) and the clamping module (1-3); the position and pose of the clamping module are adjusted through the position and pose deviation measured by the coaxial alignment modules (1-4), so that the coaxial alignment of the assembly part to be assembled and the lens cone is realized; the four-dimensional adjusting platform is controlled to complete the pose adjustment of the lens barrel through the lens center deviation error measured by the optical centering module (1-5); the control module is also used for controlling the opening and closing of the gas circuit system.
The optical lens assembling and adjusting device needs to perform initialization work before assembling and adjusting, and the initialization work mainly comprises the connection of a power supply and an air path system and the adjustment of the axis of the lens cone and the axis of the air floatation rotary table to a certain precision range.
During assembly and adjustment, the lens and the space ring are placed on a to-be-assembled part placing table and move to a feeding position through a feeding linear motion table 2-1, a to-be-assembled part clamp moves to the position right above the feeding position through a clamping module 1-3, the to-be-assembled part clamp sequentially transports the lens and the space ring to the position above a lens barrel through a horizontal linear motion table 3-1 and a vertical linear motion table 3-2, coarse positioning of the lens and the space ring is completed, at the moment, deviation exists between the axis of the lens or the space ring and the axis of the lens barrel in the X and Y directions, next-step precise adjustment is needed, deviation of the to-be-assembled part and the end face of the lens barrel to a bitmap is obtained through calculation by utilizing a coaxial alignment module 1-4, a control module adjusts an XY plane adjusting platform 3-3 based on the deviation pose obtained through calculation by the coaxial alignment module 1-4, and therefore micron-level position, the alignment of the to-be-assembled part and the lens barrel is realized, and the to-be-assembled part and the lens barrel can be directly assembled after the alignment. The control module moves the lens adsorption clamp 3-4 with the lens and the space ring adsorption clamp 3-5 with the space ring to corresponding positions in the lens cone through the corresponding linear displacement table, and controls the air path to sequentially complete the release of the lens and the space ring, so that the assembly is completed. Force sensors are arranged above the lens adsorption clamps 3-4 and the space ring adsorption clamps 3-5, and in the assembling process, accidents are prevented through real-time monitoring of the force sensors. Because the lens center deviation error of the assembled lens needs to be strictly controlled, the assembling and the adjusting of the lens are more than the assembling and the adjusting of the space ring by one centering and adjusting process. The optical centering modules 1-5 detect the lens central deviation error and the lens interval, and if the lens central deviation error is out of the error requirement range, a mounting and adjusting person needs to manually adjust the lens until the lens central deviation error is within the error requirement range; if the interval between the two lenses is out of the required range, a difference value is recorded, and a space ring between the two lenses needs to be polished or replaced, so that the requirement on the interval between the lenses is met. The lens and the space ring are sequentially assembled into the lens barrel piece by piece according to the assembling and adjusting mode, and after the lens and the space ring are assembled with the lens barrel piece by piece, the assembling and adjusting of the whole optical lens are finished.
Secondly, the adjusting method of the automatic adjusting device of the optical lens of the invention comprises the following steps:
the installation and adjustment flow of the automatic optical lens installation and adjustment device is shown in fig. 6, and the installation and adjustment flow of the automatic optical lens installation and adjustment device of the invention comprises the following steps:
step 1, placing a lens cone on an air-flotation turntable 5-1 through a three-jaw clamp, and enabling the coaxiality of the axis of the outline of the outer circle of the lens cone and a rotating shaft of the air-flotation turntable 5-1 to reach the required precision by using a dial indicator method to make the parallelism of the end surface of the outer circle of the lens cone and the upper surface of a marble base reach the required precision;
step 2, placing the to-be-assembled part on a to-be-assembled part placing table corresponding to the feeding module 1-2, and controlling the to-be-assembled part to move to a feeding position along the feeding linear motion table by the control module;
the control module controls the clamp of the part to be assembled to move to the position right above the feeding position along the horizontal linear motion platform 3-1 of the clamping module 1-3 and then move to the part to be assembled along the vertical linear motion platform 3-2; starting the gas circuit system, enabling a clamp of the part to be assembled to adsorb the part to be assembled, and controlling the part to be assembled to move to an assembly area above the lens cone along the cooperation of the horizontal linear motion table 3-1 and the vertical linear motion table 3-2;
step 3, moving the prism and the light source to the middle position of the assembly part to be assembled and the lens cone by controlling the XYZ alignment adjusting table 4-1 of the coaxial alignment module 1-4;
turning on a light source, acquiring end face image information of the to-be-assembled part and the inner part of the lens barrel through the image acquisition unit 4-2, and acquiring the pose deviation of the to-be-assembled part and the lens barrel through the image information;
the control module controls and adjusts the XY plane adjusting platform 3-3 to enable the assembly part to be assembled to be coaxial with the lens cone based on the pose deviation of the assembly part to be assembled and the lens cone, and alignment is completed;
controlling the coaxial alignment module 1-4 to exit the assembly area;
step 4, the control module controls the clamp of the part to be assembled to descend to the position of the corresponding height in the lens barrel along the vertical linear motion table 3-2, the gas path system is closed, and the part to be assembled is placed into the lens barrel;
placing the space ring into the lens cone and then carrying out glue dispensing and primary fixing; after the lens is placed in the lens barrel, the control module calculates and obtains the positions of the curvature centers of the upper optical surface and the lower optical surface of the lens through the known curvature of the lens and the known thickness of the center of the lens in advance, controls the autocollimator to move along the autocollimator vertical linear motion platform 5-3 to the position where the focal plane of the objective lens reaches the curvature centers of the upper optical surface and the lower optical surface of the lens based on the positions of the curvature centers of the upper optical surface and the lower optical surface of the lens, rotates the air floatation rotary platform 5-1, obtains the lens center deviation error and the lens interval through the imaging of a cross reticle on a CCD (charge coupled device) camera of the autocollimator, performs the centering adjustment of the lens based;
and 5, repeating the steps 2-4 until all the optical lenses and the space rings are completely assembled and adjusted, and completely dispensing and fixing to complete the assembly and adjustment of the optical lens.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An automatic optical lens assembling and adjusting device realizes the assembling and adjusting of an assembly part to be assembled and a lens cone, and is characterized by comprising a control module, an auxiliary module (1-1), a feeding module (1-2), a clamping module (1-3), a coaxial alignment module (1-4) and an optical centering module (1-5);
the part to be assembled comprises a lens and a space ring;
the auxiliary module (1-1) is used for providing structural support for the device;
the feeding module (1-2) is used for moving the piece to be assembled to a set position for clamping by the clamping module (1-3);
the clamping module (1-3) clamps and conveys the part to be assembled to the upper part of the lens barrel clamped by the optical centering module through the part to be assembled clamp;
the coaxial alignment module (1-4) is used for measuring the position and posture deviation of the to-be-assembled part and the lens barrel end face to the bitmap and sending the position and posture deviation to the control module;
the optical centering module (1-5) is used for measuring the lens center deviation error and sending the lens center deviation error to the control module;
the control module is used for controlling the movement of the feeding module (1-2) and the clamping module (1-3); the position and attitude of the clamping module are adjusted through the position and attitude deviation measured by the coaxial alignment modules (1-4), so that the assembly part to be assembled and the lens cone are aligned coaxially; the position and pose of the lens cone are adjusted through the lens center deviation error measured by the optical centering module (1-5) so that the lens and the lens cone are coaxially aligned;
the to-be-assembled part clamp comprises a lens adsorption clamp (3-4) and a space ring adsorption clamp (3-5), and force sensors are arranged above the lens adsorption clamp (3-4) and the space ring adsorption clamp (3-5);
the clamping module (1-3) comprises a horizontal linear motion platform (3-1), a vertical linear motion platform (3-2), an XY plane adjusting platform (3-3) and a clamp of a part to be assembled; the control module controls the fixture of the part to be assembled to move in the X and Z directions along the horizontal linear motion platform (3-1) and the vertical linear motion platform (3-2) respectively, and controls the XY plane adjusting platform (3-3) to realize the position adjustment of the fixture of the part to be assembled in the XY plane; the to-be-assembled part clamp is used for clamping the to-be-assembled part;
the part of the lens adsorption clamp (3-4) in contact with the lens is of an arc-shaped structure; an adsorption head of the space ring clamp (3-5) is provided with an electric three-jaw, and the control module controls the movement of the electric three-jaw of the adsorption head to realize the adsorption of space rings with different sizes in a stroke range;
the coaxial alignment module (1-4) comprises an XYZ alignment adjusting table (4-1), an image acquisition unit (4-2), a prism pose adjusting mechanism (4-3), a light source (4-4) and a prism (4-5); the XYZ alignment adjusting table (4-1) is used for adjusting the pose of the image acquisition unit (4-2) and assisting focusing; the image acquisition unit (4-2) is used for acquiring end face alignment images of the to-be-assembled part and the lens barrel; the prism adjusting mechanism (4-3) is used for adjusting and locking the pose of the prism; the light source (4-4) provides light during image acquisition; the prism (4-5) is used for changing the light path, so that the image acquisition unit (4-2) can acquire images of an upper part and a lower part;
the optical centering module (1-5) comprises an air floatation rotary table (5-1), an autocollimator (5-2) and an autocollimator vertical linear motion table (5-3); the air-floating rotary table (5-1) comprises a lens cone clamp, a four-dimensional adjusting platform and an air-floating bearing, wherein the lens cone clamp is used for clamping lens cones with different diameters, the four-dimensional adjusting platform is used for adjusting the pose of the lens cones under the control of a control module, and the air-floating bearing is used for realizing the rotary motion in the eccentric measurement process; the autocollimator (5-2) vertically moves along the autocollimator vertical linear motion table (5-3) to realize the measurement of lens center deviation error and lens surface interval;
the automatic optical lens adjusting process specifically comprises the following steps:
step 1, placing a lens cone on an air floatation rotary table (5-1) through a three-jaw clamp, and enabling the coaxiality of the axis of the outline of the outer circle of the lens cone and a rotating shaft of the air floatation rotary table (5-1) to reach the required precision by using a dial indicator method to make the parallelism of the end surface of the outer circle of the lens cone and the upper surface of a marble base reach the required precision;
step 2, placing the to-be-assembled part on a to-be-assembled part placing table corresponding to the feeding module (1-2), and controlling the to-be-assembled part to move to a feeding position along the feeding linear motion table by the control module;
the control module controls the clamp of the part to be assembled to move to the position right above the feeding position along the horizontal linear motion platform (3-1) of the clamping module (1-3) and then move to the part to be assembled along the vertical linear motion platform (3-2); starting the gas circuit system, enabling a clamp of the part to be assembled to adsorb the part to be assembled, and controlling the horizontal linear motion table (3-1) and the vertical linear motion table (3-2) to move to an assembly area above the lens cone in a matching manner;
step 3, moving the prism and the light source to the middle position of the assembly part to be assembled and the lens barrel by controlling an XYZ alignment adjusting table (4-1) of the coaxial alignment module (1-4);
turning on a light source, acquiring end face image information of the to-be-assembled part and the inner part of the lens barrel through an image acquisition unit (4-2), and acquiring the pose deviation of the to-be-assembled part and the lens barrel through the image information;
the control module controls and adjusts the XY plane adjusting platform (3-3) to enable the assembly part to be assembled to be coaxial with the lens cone based on the pose deviation of the assembly part to be assembled and the lens cone, and alignment is completed;
controlling the coaxial alignment module (1-4) to exit the assembly area;
step 4, the control module controls the clamp of the part to be assembled to descend to the position with the corresponding height in the lens barrel along the vertical linear motion table (3-2), the gas path system is closed, and the part to be assembled is placed into the lens barrel;
placing the space ring into the lens cone and then carrying out glue dispensing and primary fixing; after the lens is placed in the lens barrel, the control module calculates and obtains the positions of the curvature centers of the upper optical surface and the lower optical surface of the lens through the known curvature of the lens and the known thickness of the center of the lens in advance, controls the autocollimator to move along an autocollimator vertical linear motion platform (5-3) to the position where the focal plane of the objective lens reaches the curvature centers of the upper optical surface and the lower optical surface of the lens based on the positions of the curvature centers of the upper optical surface and the lower optical surface of the lens, rotates an air floatation rotary platform (5-1), obtains the lens center deviation error and the lens interval through the imaging of a cross reticle on a CCD (charge coupled device) camera of the autocollimator, performs the centering adjustment of the lens based;
and 5, repeating the steps 2-4 until all the optical lenses and the space rings are completely assembled and adjusted, and completely dispensing and fixing to complete the assembly and adjustment of the optical lens.
2. The automatic optical lens adjusting device according to claim 1, wherein the feeding module (1-2) comprises a feeding linear motion table (2-1) and a to-be-assembled piece mounting table; the to-be-assembled part placing table is used for carrying a lens placing unit (2-2) and a space ring placing unit (2-3), and the to-be-assembled part placing table moves along the feeding linear motion table (2-1) under the control of the control module.
3. The automatic assembling and adjusting device for optical lens as claimed in claim 2, wherein the lens mounting unit (2-2) is provided with two electric claws, and the two electric claws move the lens under the control of the control module to realize the centering of the lens and the lens clamp and ensure that the lens clamp clamps the lens at the same position; the hole for placing the space ring on the space ring placing unit (2-3) is a step hole with more than two stages and is used for being matched with space rings with different sizes.
4. An automatic adjusting device for optical lens of claim 1, wherein the image collecting unit adopts a microscope lens and a CCD camera, the light source adopts a ring light source, and the prism adopts a cube prism.
5. The automatic optical lens adjusting device according to claim 1, further comprising a dial indicator adsorption plate (2-4), wherein the dial indicator adsorption plate (2-4) is used for adsorbing a dial indicator, and the coaxiality of the axis of the outer circle profile of the lens barrel and the rotating shaft of the air-floating turntable (5-1) is adjusted in a dial indicator beating mode to achieve set accuracy.
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