CN111338390A - Cemented lens centering control method and system and full-automatic cementing equipment - Google Patents
Cemented lens centering control method and system and full-automatic cementing equipment Download PDFInfo
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- CN111338390A CN111338390A CN202010271635.0A CN202010271635A CN111338390A CN 111338390 A CN111338390 A CN 111338390A CN 202010271635 A CN202010271635 A CN 202010271635A CN 111338390 A CN111338390 A CN 111338390A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000003384 imaging method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000001028 reflection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000008092 positive effect Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- Automation & Control Theory (AREA)
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Abstract
The invention belongs to the technical field of optical alignment detection, and discloses a cemented lens centering control method, a system and full-automatic cementing equipment.A positioning jig, the centering jig and a to-be-cemented lens are arranged on an air floatation rotary table, the first surface of the cemented lens faces an autocollimator, the positioning jig is directly connected with the air floatation rotary table, and the centering jig is in contact with the first surface of the cemented lens; after the combination is finished, performing cemented mirror eccentricity measurement; the computer automatically controls and moves the position of the autocollimator and the relay lens in the direction of the optical axis, and the air floatation rotary table is rotated to measure the reflection eccentricity of each surface after the spherical center image of each surface is found; according to the second and third surface eccentric results, calculating the current positions of the spherical centers of the second and third surfaces, and making a straight line through the spherical centers; the centering jig drives the first surface of the cemented mirror to translate, the movement position of the spherical center image of the first surface is observed through the autocollimator until the spherical center image of the first surface is superposed with the target position, and then centering is completed. The invention improves the gluing centering precision and has no technical requirements on operators.
Description
Technical Field
The invention belongs to the technical field of optical alignment detection, and particularly relates to a cemented lens centering control method, a cemented lens centering control system and full-automatic cementing equipment.
Background
Currently, the center of the cemented lens is centered by a method of transmitting image focus. The method comprises the steps of positioning the optical axis of the cemented mirror by positioning a return part and a target reticle at a calibration position with high precision, placing the return part in an equipment positioning jig during gluing, moving the reticle or a measuring lens in a measuring system to enable a focal point image cross target to coincide with a reticle central plate, then placing the cemented mirror on the positioning jig, observing the difference between the focal point image position of the cemented mirror and the reticle central position, and performing centering through manual adjustment.
Meanwhile, the western-safety-light machine in the Chinese academy of sciences provides a method for improving the centering precision of the cemented lens based on an error distribution method. The method measures the sphere center jumping quantity of each surface of the cemented mirror through an internal focusing telescope with the optical axis coinciding with the lathe rotating shaft, and then adjusts the sphere center of each surface to the lathe rotating shaft to realize the centering of the cemented mirror. The method has the defects that the measurement precision of the inner focusing light tube is limited by the focusing straightness error of the inner focusing light tube, the measurement result precision of the spherical center runout is further reduced, and the optical axis of the cemented mirror needs to be adjusted to be coincident with the lathe axis, so that the optical axis of each lens needs to be adjusted to be coincident with the lathe axis. This places high demands on the operating skills and theoretical knowledge of the equipment and the operator.
In summary, the problems of the prior art are as follows: in the prior art, the coaxiality of the spherical centers of the three surfaces of the cemented mirror cannot be ensured, and the precision of the cemented mirror and a measuring system can only achieve classification, so that the cementing and centering precision is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cemented lens centering control method, a cemented lens centering control system and full-automatic cementing equipment.
The invention is realized in this way, a cemented lens centering control method, comprising:
the method comprises the following steps that firstly, a positioning jig, a centering jig and a to-be-glued mirror are installed on an air floatation rotary table, a first surface of the glued mirror faces an autocollimator, a second surface of the glued mirror is a gluing surface, a third surface of the glued mirror is in contact with the positioning jig, the positioning jig is directly connected with the air floatation rotary table, and the centering jig is in contact with the first surface of the glued mirror;
step two, after the combination is finished, the eccentric measurement of the cemented mirror is carried out; the software calculates the actual positions of the three spherical center images according to the optical imaging principle and inputs the actual positions into the motion control system, and the motion control system drives the autocollimator and the relay lens to move up and down to the position of the spherical center image. After finding the spherical center image of each surface, rotating an air floatation rotary table to respectively measure the reflection eccentricity of each surface; the air floatation rotary table is rotated to the zero position, and the autocollimator and the relay lens are moved to the position where the spherical center image of the first surface can be clearly imaged;
step three, according to the second and third surface eccentricity results, taking a rotating shaft of the rotary table as a Z axis and the vertex of the first surface as an original point, establishing a coordinate system, and calculating the current spatial positions of the spherical centers of the second and third surfaces according to the thickness and the curvature of the lens, wherein the second and third surface eccentricity results are the spatial positions of the spherical centers relative to the Z axis; making a straight line through the second and third surface ball centers;
and fourthly, the centering jig drives the first surface of the cemented mirror to translate, the movement position of the spherical center image of the first surface is observed through the autocollimator until the spherical center image of the first surface is superposed with the target position, and centering is finished.
Further, in the first step, the centering jig completes the centering of the cemented mirror.
Further, in the third step, after the straight line is made, the intersection point of the straight line and the section plane where the first surface sphere center is located is calculated, the software imaging area images the plane at the moment, the current first surface sphere center image is also in the imaging area, the position of the intersection point relative to the current sphere center image is calculated, and the result is marked in the imaging area of the software to serve as the target position.
Another object of the present invention is to provide a cemented lens centering control system for implementing the cemented lens centering control method, which is provided with an air-floating turntable;
a positioning jig is arranged at the upper end of the air floatation rotary table, and a lens to be glued is placed at the upper end of the positioning jig; the to-be-cemented mirror comprises a cemented mirror first surface, a cemented mirror second surface and a cemented mirror third surface.
Further, the first surface of the cemented mirror faces the autocollimator, and a relay lens is arranged at the lower end of the autocollimator; the second surface of the cemented mirror is a cemented surface, and the third surface of the cemented mirror is contacted with the positioning jig.
Further, the centering jig is in contact with the first surface of the cemented lens.
In summary, the advantages and positive effects of the invention are: the invention measures the position of the spherical center image of the cemented mirror by a reflection method, and then translates the spherical center of the first surface to the optical axis by taking the spherical centers of the second surface and the third surface as the optical axis. The invention has no high requirement on the precision of the positioning jig, and only requires that the spherical center image of the cemented mirror placed on the positioning jig can enter the visual field of the digital autocollimator. And the absolute coaxiality of the cemented mirror is realized by taking the connecting line of the spherical centers of the second surface and the third surface as an optical axis and moving the spherical center of the first surface onto the optical axis. The invention simplifies the technical difficulty of centering, thereby improving the centering efficiency of the cemented mirror; meanwhile, the eccentricity measurement and the gluing centering are carried out by using a reflection method, so that all the spherical centers are positioned on the same straight line after the cemented mirror is centered, and the gluing centering precision is improved.
The connecting line of the spherical centers of the second surface and the third surface of the cemented mirror is taken as the optical axis, and the optical axis of the cemented mirror is not required to be superposed with the rotating shaft of the cementing and centering device; the spherical centers of the three surfaces of the cemented mirror are completely coaxial, so that the cementing and centering precision is improved; meanwhile, the invention can be applied to the gluing of infinite lenses in an expanded way, and has no technical requirements on operators.
The invention measures the position of the spherical center image of the cemented mirror by a reflection method, and then translates the spherical center of the 1 surface to the optical axis by taking the spherical centers of the 2 and 3 surfaces as the optical axis. The method has no high requirement on the precision of the positioning jig, and only requires that the spherical center image of the cemented mirror placed on the positioning jig can enter the field of view of the digital autocollimator; the absolute coaxiality of the cemented mirror is realized by moving the spherical center of the 1 surface onto the optical axis by taking the connecting line of the spherical centers of the 2 surface and the 3 surface as the optical axis, the technical difficulty of centering is simplified, and the centering efficiency of the cemented mirror is improved; meanwhile, the eccentricity measurement and the gluing centering are carried out by using a reflection method, so that all the spherical centers are positioned on the same straight line after the cemented mirror is centered, and the gluing centering precision is improved.
Drawings
Fig. 1 is a flowchart of a cemented lens centering control method according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a gluing centering optical system provided by an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a digital autocollimator and a relay lens according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a positioning fixture, an air-floating turntable, and a mirror to be glued according to an embodiment of the present invention.
In the figure: 1. a cemented mirror first face; 11. a first face spherical center image; 2. a second surface of the cemented mirror; 21. a second face centroid image; 3. a third surface of the cemented mirror; 31. a third face spherical center image; 4. a digital autocollimator; 5. a relay lens; 6. a centering jig; 7. a cemented mirror; 8. positioning a jig; 9. an air-flotation turntable; 10. an optical axis.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a cemented lens centering control method, a cemented lens centering control system and full-automatic cementing equipment, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a cemented lens centering control method provided by an embodiment of the present invention includes:
s101: the positioning jig, the centering jig and the to-be-glued mirror are installed on the air floatation rotary table, the first surface of the glued mirror faces the autocollimator, the second surface of the glued mirror is a glued surface, the third surface of the glued mirror is in contact with the positioning jig, the positioning jig is directly connected with the air floatation rotary table, and the centering jig is in contact with the first surface of the glued mirror.
S102: after the combination is finished, performing cemented mirror eccentricity measurement; the computer automatically controls and moves the position of the autocollimator and the relay lens in the direction of the optical axis, and the air floatation rotary table is rotated to measure the reflection eccentricity of each surface after the spherical center image of each surface is found; and the air floatation rotary table is rotated to the zero position, and the autocollimator and the relay lens are moved to the position where the spherical center image of the first surface can be clearly imaged.
S103: calculating the current positions of the spherical centers of the second and third surfaces according to the eccentric results of the second and third surfaces; making a straight line through the second and third surface ball centers; and calculating the intersection point of the straight line and the section plane where the first surface sphere center is located, and marking the result in the imaging area of the software as a target position.
S104: the centering jig drives the first surface of the cemented mirror to translate, the movement position of the spherical center image of the first surface is observed through the autocollimator until the spherical center image of the first surface is superposed with the target position, and then centering is completed.
As shown in fig. 2 to 4, the cemented lens centering control system provided in the embodiment of the present invention is provided with an air-floating turntable 9, a positioning fixture 8 is installed at the upper end of the air-floating turntable 9, and a cemented lens to be cemented is placed at the upper end of the positioning fixture 8; the to-be-cemented mirror includes a cemented mirror first face 1, a cemented mirror second face 2, and a cemented mirror third face 3.
The first surface 1 of the cemented mirror faces the autocollimator 4, and the lower end of the autocollimator 4 is provided with a relay lens 5; the second surface 2 of the cemented mirror is a cemented surface, and the third surface of the cemented mirror is contacted with the positioning jig 6.
Wherein, the positioning fixture 8 is contacted with the first surface 1 of the cemented mirror.
The working principle of the invention is as follows: install positioning jig 6, centering jig 8 and treat that the cemented mirror is on air supporting revolving stage 9, the first face 1 of cemented mirror faces to digital auto-collimation 4 appearance, and cemented mirror second face 2 and cemented mirror third face 3 positioning jig, positioning jig 8 lug connection air supporting revolving stage 9, centering jig and the first face 1 contact of cemented mirror.
After the combination is finished, performing cemented mirror eccentricity measurement; the computer automatically controls and moves the positions of the digital autocollimator 4 and the relay lens in the direction of the optical axis 10, and the air floatation rotary table 9 is rotated to measure the reflection eccentricity of each surface after the spherical center image of each surface is found; the air-float turntable 9 rotates back to the zero position, and the digital autocollimator 4 and the relay lens move to the position where the first surface spherical center image 1 can be clearly imaged.
Calculating the current positions of the spherical centers of the second and third surfaces according to the eccentric results of the second and third surfaces; making a straight line through the second and third surface ball centers; and calculating the intersection point of the straight line and the section plane where the first surface sphere center is located, and marking the result in the imaging area of the software as a target position. The centering jig 8 drives the first surface 1 of the cemented mirror to translate, the movement position of the first surface spherical center image 11 is observed through the digital autocollimator 4 until the first surface spherical center image 11 is superposed with the target position, and centering is finished.
According to the full-automatic gluing equipment, the whole process of gluing one double-cemented mirror from the placement of the mirror to be glued to the removal of the glued mirror after the gluing and curing is only 1 minute, and the eccentricity of the cemented mirror is less than 30 arc seconds through the statistics of the eccentricity measurement results of 30 4 groups of cemented mirrors glued by adopting the method.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A cemented lens centering control method is characterized by comprising the following steps:
the method comprises the following steps that firstly, a positioning jig, a centering jig and a to-be-glued mirror are installed on an air floatation rotary table, a first surface of the glued mirror faces an autocollimator, a second surface of the glued mirror is a gluing surface, a third surface of the glued mirror is in contact with the positioning jig, the positioning jig is directly connected with the air floatation rotary table, and the centering jig is in contact with the first surface of the glued mirror;
step two, after the combination is finished, the eccentric measurement of the cemented mirror is carried out; the computer automatically controls and moves the position of the autocollimator and the relay lens in the direction of the optical axis, and the air floatation rotary table is rotated to measure the reflection eccentricity of each surface after the spherical center image of each surface is found; the air floatation rotary table is rotated to the zero position, and the autocollimator and the relay lens are moved to the position where the spherical center image of the first surface can be clearly imaged;
calculating the current positions of the second surface sphere center and the third surface sphere center according to the second surface eccentricity and the third surface eccentricity results; making a straight line through the second and third surface ball centers;
and fourthly, the centering jig drives the first surface of the cemented mirror to translate, the movement position of the spherical center image of the first surface is observed through the autocollimator until the spherical center image of the first surface is superposed with the target position, and centering is finished.
2. The method as claimed in claim 1, wherein in the first step, the centering fixture completes the centering of the cemented lens.
3. The method for controlling the centering of a cemented lens as claimed in claim 1, wherein in the third step, after the straight line is made, the intersection point of the straight line and the section plane where the first face center of sphere is located is calculated, and the result is marked in the imaging area of the software as the target position.
4. A cemented lens centering control system for carrying out the cemented lens centering control method as claimed in claims 1 to 3, wherein the cemented lens centering control system is provided with an air-floating turret;
a positioning jig is arranged at the upper end of the air floatation rotary table, and a lens to be glued is placed at the upper end of the positioning jig; the to-be-cemented mirror comprises a cemented mirror first surface, a cemented mirror second surface and a cemented mirror third surface.
5. The cemented lens centering control system as claimed in claim 4, wherein the cemented lens first face is directed towards an autocollimator, the lower end of which is provided with a relay lens; the second surface of the cemented mirror is a cemented surface, and the third surface of the cemented mirror is contacted with the positioning jig.
6. The cemented lens centering control system of claim 4, wherein the centering fixture is in contact with the cemented lens first face.
7. A fully automated gluing device equipped with the cemented lens centering control system of claim 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010271635.0A CN111338390A (en) | 2020-04-08 | 2020-04-08 | Cemented lens centering control method and system and full-automatic cementing equipment |
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| CN202010271635.0A CN111338390A (en) | 2020-04-08 | 2020-04-08 | Cemented lens centering control method and system and full-automatic cementing equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180533A (en) * | 2020-10-08 | 2021-01-05 | 中山市光大光学仪器有限公司 | Method for processing central pinhole-shaped cemented lens |
| CN112285942A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Centering device for gluing combined lens and method for forming glued lens |
| TWI744146B (en) * | 2020-12-24 | 2021-10-21 | 國立中興大學 | Alignment positioning device and method for assembled lens |
| CN114770766A (en) * | 2022-05-12 | 2022-07-22 | 北京创思工贸有限公司 | Method and process for improving cemented lens machining process based on centering turning |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112180533A (en) * | 2020-10-08 | 2021-01-05 | 中山市光大光学仪器有限公司 | Method for processing central pinhole-shaped cemented lens |
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| TWI744146B (en) * | 2020-12-24 | 2021-10-21 | 國立中興大學 | Alignment positioning device and method for assembled lens |
| CN114770766A (en) * | 2022-05-12 | 2022-07-22 | 北京创思工贸有限公司 | Method and process for improving cemented lens machining process based on centering turning |
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Application publication date: 20200626 |