CN112284319A - Tool and method for measuring central thickness of meniscus lens with non-coincident vertex and gravity center - Google Patents
Tool and method for measuring central thickness of meniscus lens with non-coincident vertex and gravity center Download PDFInfo
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- CN112284319A CN112284319A CN202011180323.5A CN202011180323A CN112284319A CN 112284319 A CN112284319 A CN 112284319A CN 202011180323 A CN202011180323 A CN 202011180323A CN 112284319 A CN112284319 A CN 112284319A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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Abstract
The invention provides a meniscus lens center thickness measuring tool with a non-coincident vertex and gravity center, which comprises a platform, a detection system arranged on the platform and a position pitching adjusting mechanism used for adjusting the pitching angle of the detection system; the detection system comprises a detection table top and an upright post which are arranged on the direction pitching adjusting mechanism, wherein two linear guide rails are arranged on the upright post, and a measuring head and an inner focusing light tube are respectively arranged on the two linear guide rails. According to the meniscus lens center thickness measuring tool with the non-coincident vertex and gravity center, the plane reference reflector is placed on the irregular meniscus lens, so that the optical axis of the lens is perpendicular to the light pipe, the position of the collimating lens of the azimuth pitching adjusting mechanism is adjusted, the problem that the vertex and the gravity center of the convex surface of the lens are not consistent due to the influence of the self weight in the meniscus lens placing process is solved, and the accuracy of test data can be effectively guaranteed.
Description
Technical Field
The invention relates to the field of optical part detection, in particular to a meniscus lens center thickness measuring tool and a meniscus lens center thickness measuring method with a non-coincident vertex and gravity center.
Background
For photoelectric products, the central thickness of the lens is an important index influencing the imaging of an optical system, the central thickness of an optical part is a decisive factor ensuring the final imaging quality, and a series of parameters such as the focal length, the field size and the like of the optical system are influenced.
In a certain product, in order to reduce the volume and the weight of the product, a round lens is designed into an irregular-shaped lens, and when the lens is measured by using a conventional thickness gauge, the central thickness error is large when the lens is placed with the convex surface facing downwards for measurement due to the fact that the vertex of the lens is not coincident with the gravity center position. When the optical system is spaced, the distance between the unit lenses cannot be accurately adjusted.
In order to meet the accuracy of the distance between the unit lenses and improve the production efficiency, the method provides a method for measuring the central thickness of the meniscus lens, wherein the vertex of the meniscus lens is not coincident with the gravity center of the meniscus lens.
Disclosure of Invention
In order to solve the problems, the invention provides a meniscus lens center thickness measuring tool with a vertex not coinciding with the gravity center, and a method for accurately measuring the center thickness when the vertex of the lens does not coincide with the gravity center. The device adjusts the angular deviation of the lens, and eliminates the inclination caused by the unbalanced weight of the lens when the lens is placed. The detection precision is improved.
The invention aims to provide a meniscus lens center thickness measuring tool with a non-coincident vertex and gravity center, which comprises a platform, a detection system arranged on the platform and a position pitching adjusting mechanism used for adjusting the pitching angle of the detection system; the detection system comprises a detection table top and an upright post which are arranged on the direction pitching adjusting mechanism, wherein two linear guide rails are arranged on the upright post, and a measuring head and an inner focusing light tube are respectively arranged on the two linear guide rails.
The tool for measuring the central thickness of the meniscus lens with the vertex not coincident with the gravity center has the characteristic that the precision of the detection table surface is 00 grade.
The tool for measuring the central thickness of the meniscus lens with the vertex not coincident with the gravity center is also characterized in that a plane reference reflecting mirror and three claws for reflecting the actual angular deviation of the lens are arranged on the detection table surface.
The tool for measuring the central thickness of the meniscus lens with the vertex not coincident with the gravity center also has the characteristic that the measuring head and the inner focusing light pipe are arranged above the detection table board.
Another object of the present invention is to provide a method for measuring a central thickness of a meniscus lens having a vertex not coincident with a center of gravity, the method using the tool according to any one of claims 1 to 4.
The invention provides a method for measuring the central thickness of a meniscus lens with a non-coincident vertex and gravity center, which is also characterized by comprising the following steps:
s1: adjusting the positions of the inner focusing light pipe and the measuring head to enable the inner focusing light pipe to be parallel to the measuring head;
s2: mounting the three claws on a detection table board, and then placing the convex surface of the meniscus lens to be detected on the three claws;
s3: preventing the plane reference reflector from being on the meniscus lens, and adjusting the azimuth pitching adjusting mechanism 7 to enable the plane reference reflector to be vertical to the internal focusing light pipe;
s4: the height measuring head 2 is reset at the position of the plane reference reflector 3, and the plane reference reflector 3 is taken down;
s5: the position of the meniscus lens is adjusted by adjusting the azimuth pitching adjusting mechanism 7, so that the meniscus lens is coincided with the center of the measuring head, the lowest point of the meniscus lens between the plane reflectors is measured, and data D is recorded;
s6: removing the three claws, placing the plane reference reflector on the table board, enabling the table board to be vertical to the measuring head by adjusting the azimuth pitching adjusting mechanism, flatly placing the meniscus lens on the table board, measuring the total height of the meniscus lens and recording data B;
s7: the thickness of the center of the lens is calculated,
the thickness of the plane reference mirror 3 is F.
The method for measuring the thickness of the center of the meniscus lens, the vertex of which is not coincident with the gravity center, is also characterized in that the thickness of the center of the lens in the S7 is B-D-F.
Advantageous effects
According to the meniscus lens center thickness measuring tool with the non-coincident vertex and gravity center, the plane reference reflector is placed on the irregular meniscus lens, so that the optical axis of the lens is perpendicular to the light pipe, the position of the collimating lens of the azimuth pitching adjusting mechanism is adjusted, the problem that the vertex and the gravity center of the convex surface of the lens are not consistent due to the influence of the self weight in the meniscus lens placing process is solved, and the accuracy of test data can be effectively guaranteed.
Drawings
Fig. 1 is a schematic structural view of a meniscus lens center thickness measurement tool with a non-coincident vertex and center of gravity according to the present invention;
fig. 2 is a schematic view of a meniscus lens with a non-coincident vertex and center of gravity according to the present invention;
FIG. 3 is a schematic view showing a natural state of the lens according to the present invention,
wherein, 1: an internal focusing light pipe; 2: a measuring head; 3: a planar reference mirror; 4: a meniscus lens; 5: three claws; 6: detecting the table top; 7: an azimuth pitch adjustment mechanism; 8: a platform; 9: a linear guide rail; 10: and (4) a column.
Detailed Description
The present disclosure is further described below in conjunction with the appended drawings and specific embodiments, the advantages and features of which will become more apparent as the description proceeds. These embodiments are merely exemplary and do not limit the scope of the disclosure in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that such changes and modifications may be made without departing from the spirit and scope of the disclosure.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing and simplifying the description of the present disclosure, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present disclosure.
In addition, in the description of the invention of the present disclosure, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1-3, the present invention provides a meniscus lens center thickness measurement tool with a non-coincident vertex and gravity center, wherein the tool comprises a platform 8, a detection system arranged on the platform 8, and an azimuth pitching adjustment mechanism 7 for adjusting a pitching angle of the detection system; the detection system comprises a detection table top 6 and an upright post 10 which are arranged on the direction pitching adjusting mechanism 7, wherein two linear guide rails 9 are arranged on the upright post 10, and a measuring head 2 and an inner focusing light tube 1 are respectively arranged on the two linear guide rails 9. The precision of the detection table top 6 is 00 grade. The detection table surface 6 is provided with a plane reference reflecting mirror 3 for reflecting the actual angular deviation of the lens and three claws 5. The measuring head 2 and the inner focusing light pipe 1 are arranged above the detection table top 6.
The method for measuring the thickness of the center of the meniscus lens with the non-coincident vertex and gravity center provided by the embodiment comprises the following steps:
s1: adjusting the positions of the internal focusing light pipe 1 and the measuring head 2 to enable the internal focusing light pipe 1 to be parallel to the measuring head 2;
s2: mounting the three claws 5 on the detection table board 6, and then placing the convex surface of the meniscus lens 4 to be detected on the three claws 5;
s3: placing the plane reference reflector 3 on the meniscus lens 4, and adjusting the azimuth pitching adjusting mechanism 7 to enable the plane reference reflector 3 to be vertical to the inner focusing light pipe 1;
s4: the height measuring head 2 is reset at the position of the plane reference reflector 3, and the plane reference reflector 3 is taken down;
s5: the position of the meniscus lens 4 is adjusted by adjusting the azimuth pitching adjusting mechanism 7, so that the meniscus lens 4 is coincided with the center of the measuring head 2, the lowest point of the meniscus lens 4 between the plane reflectors 3 is measured, and data D is recorded;
s6: removing the three claws 5, placing the plane reference reflector 3 on the detection table top 6, enabling the detection table top 6 to be vertical to the measuring head 2 by adjusting the azimuth pitching adjusting mechanism 7, flatly placing the meniscus lens 4 on the detection table top 6, measuring the total height of the meniscus lens 4 and recording data B;
s7: the lens center thickness B-D-F was calculated,
the thickness of the plane reference mirror 3 is F.
In the embodiment, the internal focusing light pipe 1 is additionally arranged and used for monitoring the angular deviation influence caused by the misalignment of the center and the gravity center under the natural placement state of the meniscus lens 4, and the plane reference reflector 3 is used for reflecting the actual angular deviation of the lens more accurately; and a direction pitching adjusting mechanism 7 is added to adjust the angular deviation of the meniscus lens.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (7)
1. A meniscus lens center thickness measuring tool with a non-coincident vertex and gravity is characterized by comprising a platform, a detection system arranged on the platform and a position pitching adjusting mechanism used for adjusting a pitching angle of the detection system; the detection system comprises a detection table top and an upright post which are arranged on the direction pitching adjusting mechanism, wherein two linear guide rails are arranged on the upright post, and a measuring head and an inner focusing light tube are respectively arranged on the two linear guide rails.
2. The meniscus lens center thickness measurement tool with the apex not coincident with the center of gravity of claim 1, wherein the inspection bench precision is 00 grade.
3. The meniscus lens center thickness measurement tool with the apex not coinciding with the center of gravity according to claim 1, wherein a plane reference reflecting mirror and three claws for reflecting actual angular deviation of the lens are arranged on the detection bench.
4. The meniscus lens center thickness measurement tool with the non-coincident apex and center of gravity of claim 1, wherein the stylus and the inner focusing light pipe are disposed above the inspection stage.
5. A method of measuring a central thickness of a meniscus lens with its apex not coincident with its center of gravity, using the tool of any one of claims 1 to 4.
6. A method of measuring a central thickness of a meniscus lens with its apex not coincident with its center of gravity as claimed in claim 5, the method comprising the steps of:
s1: adjusting the positions of the inner focusing light pipe and the measuring head to enable the inner focusing light pipe to be parallel to the measuring head;
s2: mounting the three claws on a detection table board, and then placing the convex surface of the meniscus lens to be detected on the three claws;
s3: placing a plane reference reflector on the meniscus lens, and adjusting the azimuth pitching adjusting mechanism to enable the plane reference reflector to be perpendicular to the inner focusing light pipe;
s4: resetting the height measuring head at the position of the plane reference reflector, and taking down the plane reference reflector;
s5: the position of the meniscus lens is adjusted by adjusting the position pitching adjusting mechanism, so that the meniscus lens is coincided with the center of the measuring head, the lowest point of the meniscus lens between the plane reflectors is measured, and data D is recorded;
s6: removing the three claws, placing the plane reference reflector on the detection table board, enabling the detection table board to be vertical to the measuring head by adjusting the azimuth pitching adjusting mechanism, flatly placing the meniscus lens on the detection table board, measuring the total height of the meniscus lens and recording data B;
s7: the thickness of the center of the lens is calculated,
wherein the thickness of the plane reference mirror is F.
7. A method of measuring a center thickness of a meniscus lens with a non-coincident center of gravity and vertex, according to claim 6, wherein the lens center thickness in S7 is B-D-F.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180323.5A CN112284319B (en) | 2020-10-29 | 2020-10-29 | Tool and method for measuring central thickness of meniscus lens with non-coincident vertex and gravity center |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180323.5A CN112284319B (en) | 2020-10-29 | 2020-10-29 | Tool and method for measuring central thickness of meniscus lens with non-coincident vertex and gravity center |
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| CN112284319A true CN112284319A (en) | 2021-01-29 |
| CN112284319B CN112284319B (en) | 2022-07-08 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643534A (en) * | 1987-06-26 | 1989-01-09 | Topcon Corp | Instrument for measuring central thickness of lens |
| CN102679895A (en) * | 2012-06-11 | 2012-09-19 | 北京理工大学 | Method for measuring center thickness of reflective confocal lens |
| CN105157598A (en) * | 2015-04-30 | 2015-12-16 | 西安工业大学 | Transmitted wavefront detection apparatus and method for meniscus lens |
| CN106840001A (en) * | 2017-01-16 | 2017-06-13 | 中国科学院上海光学精密机械研究所 | The non-contact measurement apparatus and measuring method of optical lens center thickness |
| CN107131846A (en) * | 2017-05-27 | 2017-09-05 | 中国科学院上海技术物理研究所 | A kind of optical system for the convex oblate spheroid detection of super large caliber |
| CN208246476U (en) * | 2018-05-21 | 2018-12-18 | 河南平原光电有限公司 | A kind of fixture of optics cold processing control lens center thickness |
| CN210773918U (en) * | 2019-10-30 | 2020-06-16 | 上海微电子装备（集团）股份有限公司 | Non-contact lens center thickness measuring device |
-
2020
- 2020-10-29 CN CN202011180323.5A patent/CN112284319B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643534A (en) * | 1987-06-26 | 1989-01-09 | Topcon Corp | Instrument for measuring central thickness of lens |
| CN102679895A (en) * | 2012-06-11 | 2012-09-19 | 北京理工大学 | Method for measuring center thickness of reflective confocal lens |
| CN105157598A (en) * | 2015-04-30 | 2015-12-16 | 西安工业大学 | Transmitted wavefront detection apparatus and method for meniscus lens |
| CN106840001A (en) * | 2017-01-16 | 2017-06-13 | 中国科学院上海光学精密机械研究所 | The non-contact measurement apparatus and measuring method of optical lens center thickness |
| CN107131846A (en) * | 2017-05-27 | 2017-09-05 | 中国科学院上海技术物理研究所 | A kind of optical system for the convex oblate spheroid detection of super large caliber |
| CN208246476U (en) * | 2018-05-21 | 2018-12-18 | 河南平原光电有限公司 | A kind of fixture of optics cold processing control lens center thickness |
| CN210773918U (en) * | 2019-10-30 | 2020-06-16 | 上海微电子装备（集团）股份有限公司 | Non-contact lens center thickness measuring device |
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| CN112284319B (en) | 2022-07-08 |
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