CN114184353A - Optical lens assembling method - Google Patents
Optical lens assembling method Download PDFInfo
- Publication number
- CN114184353A CN114184353A CN202010855207.2A CN202010855207A CN114184353A CN 114184353 A CN114184353 A CN 114184353A CN 202010855207 A CN202010855207 A CN 202010855207A CN 114184353 A CN114184353 A CN 114184353A
- Authority
- CN
- China
- Prior art keywords
- image
- optical lens
- point
- optical
- imaging point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003384 imaging method Methods 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000010339 dilation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
An optical lens assembly method, comprising a detection step, comprising: defining a reference line to pass through the center point of the reference plane and dividing the reference plane into two blocks; acquiring a first imaging point according to a light beam which is received by the image sensing element and passes through each optical lens from the light source, and acquiring a second imaging point after each optical lens rotates to a second position; after each optical lens rotates to a third position, a third imaging point is obtained, and the position of the center of a circle passing through the first imaging point, the second imaging point and the third imaging point is calculated; dividing two blocks corresponding to each optical lens into two types according to the falling point of the circle center position; and an assembly step comprising: at least two optical lenses belonging to one of the two classes are arranged in one lens barrel, and at least two optical lenses belonging to the other of the two classes are arranged in the other lens barrel.
Description
Technical Field
The present invention relates to an optical lens; in particular to a lens eccentricity detection and lens assembly method.
Background
It is known that when an optical lens is manufactured or assembled, if the optical axis does not coincide with the rotational symmetry axis, an eccentricity error is generated, which causes many problems of image formation and image quality, therefore, before assembly, the offset of the optical axis of the lens is generally checked, and the eccentricity error measurement method includes two types, i.e., a mechanical measurement method and an optical measurement method, depending on the accuracy.
In the optical measurement method, incident light penetrates through a lens to be measured and rotates the lens to be measured with a rotation axis, if the lens to be measured has an eccentricity phenomenon, a circular light spot moving track is seen on a screen of a photoelectric Charge Coupled Device (CCD), and the eccentricity of the lens to be measured can be calculated by the light spot moving track. However, although the eccentricity of the lens can be calculated by the above optical measurement method, generally, if the lens detects eccentricity, the lens can only be discarded as a defective product in order to avoid affecting the imaging quality, and the waste of resources and the burden of cost are not avoided, so how to screen out the lens with offset before assembling the optical lens and provide good imaging quality without increasing the manufacturing cost is a problem that the inventors need to solve.
Disclosure of Invention
Accordingly, the present invention is directed to an optical lens assembling method, which can inspect the lens with offset and provide good imaging quality after assembling.
In order to achieve the above object, the present invention provides an optical lens assembly method, which includes a step of detecting a plurality of optical lenses, wherein the step of detecting includes:
A. defining a reference surface, wherein the reference surface is provided with a central point, at least one reference line is defined to pass through the central point, and the reference surface is divided into at least two blocks by the at least one reference line;
B. an image sensor receives a light beam from a light source passing through each optical lens, captures a first image from an image output by the image sensor, and obtains a first imaging point according to the first image, wherein the light source projects the light beam along a first axial direction, each optical lens is disposed at a first position, and the first axial direction passes through the center point of the reference surface and the center of each optical lens;
C. after each optical lens rotates to a second position from the first position by taking a rotating shaft as an axis, a second image is captured by the image output by the image sensing element, and a second imaging point is obtained according to the second image, wherein the rotating shaft is parallel to the first axial direction;
D. after each optical lens rotates to a third position by taking the rotating shaft as an axis, capturing a third image by the image output by the image sensing element, and acquiring a third imaging point according to the third image, wherein the third position is different from the first position and the second position;
E. according to the first imaging point, the second imaging point and the third imaging point, calculating the circle center position of a circle passing through the first imaging point, the second imaging point and the third imaging point, wherein the circle center position corresponds to one of the at least two blocks;
F. dividing each optical lens into at least two types, wherein the center position of one type of optical lens corresponds to one of the at least two blocks, and the center position of the other type of optical lens corresponds to the other of the at least two blocks; and
an assembling step comprising:
and arranging at least two optical lenses belonging to one of at least two types of optical lenses in a lens barrel.
The invention has the advantages that the optical lens assembly method can pair the plurality of optical lenses, so that the optical lenses with the circle centers positioned in the same block can be arranged in the same lens barrel, thereby improving the problem of poor imaging quality caused by overlarge eccentric error of the lenses in the optical lens and reducing the manufacturing cost of the optical lens.
Drawings
FIG. 1 is a schematic view of a lens inspection apparatus.
FIG. 2 is a flowchart illustrating an optical lens assembling method according to a preferred embodiment of the present invention.
Fig. 3 is a schematic reference plane view of the above preferred embodiment.
FIG. 4 is a photograph of a first image of the above preferred embodiment.
FIG. 5 is a photograph of a first image of the above preferred embodiment.
FIG. 6 is a photograph of the first image after binarization processing in the above preferred embodiment.
FIG. 7 is a photograph of the first image after image expansion processing according to the above preferred embodiment.
FIG. 8 is a photograph of the first image subjected to image thinning processing in the above preferred embodiment.
FIG. 9 is an image photograph of the first imaging point, the second imaging point and the plurality of third imaging points according to the above preferred embodiment.
Detailed Description
In order to more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Referring to fig. 1, a lens detecting device 1 is shown, the lens detecting device 1 includes a light source 10, a clamping fixture 20, an image sensing element 40 and a signal processing unit 60, the light source 10 projects a reticle parallel light beam along a first axial direction X, the clamping fixture 20 is used for clamping an optical lens L to be detected to rotate around a rotation axis S, the rotation axis S is parallel to the first axial direction X, the image sensing element 40 is a photographing device with a photoelectric coupling element (CCD) for receiving the light beam passing through the optical lens L to be detected from the light source 10, the signal processing unit 60 is connected to the image sensing element 40, and the signal processing unit 60 is used for processing an image output by the image sensing element 40.
Referring to fig. 2, a flowchart of an optical lens assembling method according to a preferred embodiment of the present invention is shown, where the optical lens assembling method is executed by the lens inspection apparatus 1, and the optical lens assembling method includes the following steps:
respectively carrying out a detection step on a plurality of optical lenses, wherein the detection step comprises the following steps:
step S101, defining a reference plane P having a center point C through which a reference line is defined, as shown in fig. 3, the reference line includes a first reference line L1 and a second reference line L2, the first reference line L1 and the second reference line L2 perpendicularly intersect at the center point C, and the reference plane P is divided into a first block a1, a second block a2, a third block A3 and a fourth block a 4;
step S102, the image sensor 40 receives the light beam from the light source 10 through each of the optical lenses L, the signal processing unit 60 captures a first image from the image output by the image sensor 40, and obtains a first imaging point P1 according to the first image, wherein the light source 10 projects the light beam along the first axial direction X, each of the optical lenses L is disposed at a first position, and the first axial direction X passes through the center point C of the reference plane P and the center of each of the optical lenses L;
step S103, after each of the optical lenses L rotates from the first position to a second position around the rotation axis S, the signal processing unit 60 captures a second image from the image output by the image sensing device 40, and obtains a second imaging point P2 according to the second image; in this embodiment, each of the optical lenses L rotates from the first position to the second position by a first angle, the first angle is 10 to 15 degrees, and in practice, the rotation angle of each of the optical lenses L from the first position to the second position may be other angles, and is not limited to the above-mentioned 10 to 15 degrees.
Step S104, after each of the optical lenses L rotates to the third position around the rotation axis S, the signal processing unit 60 captures a third image from the image output by the image sensing device 40, and obtains a third imaging point P3 according to the third image, where the third position is different from the first position and the second position; in this embodiment, each of the optical lenses L rotates from the second position by a second angle to the third position, where the second angle is 10 to 15 degrees, and in practice, the rotation angle of each of the optical lenses L from the second position to the third position may be other angles, and is not limited to the above-mentioned 10 to 15 degrees.
Step S105, please refer to fig. 3, in which the signal processing unit 60 calculates a position of a center C1 of a circle passing through the first imaging point P1, the second imaging point P2 and the third imaging point P3 according to the first imaging point P1, the second imaging point P2 and the third imaging point P3, where the position of the center C1 corresponds to one of the first block a1, the second block a2, the third block A3 and the fourth block a 4;
step S106, according to the block where the position of the center C1 corresponds to the reference plane P, the optical lenses L corresponding to the first block a1, the second block a2, the third block A3 and the fourth block a4 are classified into four categories, including a first category, a second category, a third category and a fourth category, for example, if the position of the center C1 of the optical lens L to be tested falls in the second block a2 as shown in fig. 3, the optical lens L to be tested is classified into the second category, and similarly, if the position of the center C1 of another optical lens to be tested falls in the first block a1, the another optical lens to be tested is classified into the first category.
The optical lens assembly method includes an assembly step S201, including: at least two optical lenses belonging to the first type, the second type, the third type and the fourth type in the plurality of optical lenses are respectively arranged in a lens barrel. For example, a user can select at least two required optical lenses from a plurality of optical lenses belonging to a first class to be arranged in a lens barrel, and the user can select at least two required optical lenses from a plurality of optical lenses belonging to a second class, a third class or a fourth class to be respectively arranged in different lens barrels, so that the optical lenses can be paired by the optical lens assembly method, the optical lenses with the circle center positions falling in the same block can be arranged in the same lens barrel, the problem of poor imaging quality caused by overlarge eccentric errors of the lenses in the optical lens is solved, and the manufacturing cost of the optical lens can be reduced.
It should be noted that, in this embodiment, the reference line includes the first reference line L1 and the second reference line L2, the first reference line L1 and the second reference line L2 intersect perpendicularly at the center point C, and the reference plane P is divided into the first block a1, the second block a2, the third block A3 and the fourth block a4 as an example, in other embodiments, the reference line may be one or more than two, for example, when the reference line is one, the reference line passes through the center point and the reference line divides the reference plane into two blocks including a first block and a second block, the circle center position corresponds to one of the two blocks, the first block and the second block corresponding to each optical lens are divided into two categories including a first category and a second category, if the circle center position of the optical lens to be measured falls on the second block, the optical lens to be measured is classified into a second type, and similarly, if the circle center position of another optical lens to be measured is located in the first block, another optical lens to be measured is classified into a first type, and then at least two optical lenses belonging to the first type are arranged in one lens barrel, and at least two optical lenses belonging to the second type are arranged in another lens barrel, so that the purpose of improving the problem of poor imaging quality caused by overlarge eccentric error of the lenses in the optical lens can be achieved.
Further, the optical lens assembly method includes performing an image processing on each of the first image, the second image and the third image, where the image processing includes a binarization processing, an image dilation processing, an image erosion processing and an image thinning processing as shown in fig. 6 to 9 to obtain the first imaging point P1, the second imaging point P2 and the third imaging point P3, respectively, and in this embodiment, the image processing of the first image (in cooperation with fig. 4) is performed sequentially according to the order of the binarization processing (in cooperation with fig. 5), the image dilation processing (in cooperation with fig. 6), the image erosion processing (in cooperation with fig. 7) and the image thinning processing (in cooperation with fig. 8).
In this embodiment, taking an example of obtaining a first imaging point P1, a second imaging point P2, and a third imaging point P3 as an example, in other embodiments, the detecting step includes repeatedly performing step S104 to obtain a plurality of third imaging points P3, where the plurality of third imaging points P3 are different from each other (with reference to fig. 9), and step S105 includes calculating, according to the first imaging point P1, the second imaging point P2, and the plurality of third imaging points P3, a position of a center C2 of a circle passing through the first imaging point P1, the second imaging point P2, and the plurality of third imaging points P3, and by obtaining the plurality of third imaging points, the accuracy of the calculated position of the center C2 can be improved.
In summary, according to the optical lens assembly method of the present invention, the plurality of optical lenses can be paired, so that the optical lenses with the circle center located in the same block can be disposed in the same lens barrel, thereby improving the problem of poor imaging quality caused by excessive eccentricity error of the lenses in the optical lens, and reducing the manufacturing cost of the optical lens.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described and claimed should be included in the scope of the present invention.
Description of the reference numerals
[ invention ]
1: detection device
10: light source
20: clamping fixture
40: image sensing element
60: signal processing unit
A1: first block
A2: second block
A3: third block
A4: the fourth block
C: center point
C1, C2: center of circle
L: optical lens
L1: first reference line
L2: second reference line
P: reference plane
P1: first imaging point
P2: second imaging point
P3: third imaging point
S: rotating shaft
X: first axial direction
S101, S102, S103, S104, S105, S106, S201: step (ii) of
Claims (9)
1. An optical lens assembly method includes the following steps:
respectively carrying out a detection step on a plurality of optical lenses, wherein the detection step comprises the following steps:
A. defining a reference surface, wherein the reference surface is provided with a central point, at least one reference line is defined to pass through the central point, and the reference surface is divided into at least two blocks by the at least one reference line;
B. an image sensor receives a light beam from a light source passing through each optical lens, captures a first image from an image output by the image sensor, and obtains a first imaging point according to the first image, wherein the light source projects the light beam along a first axial direction, each optical lens is disposed at a first position, and the first axial direction passes through the center point of the reference surface and the center of each optical lens;
C. after each optical lens rotates to a second position from the first position by taking a rotating shaft as an axis, a second image is captured by the image output by the image sensing element, and a second imaging point is obtained according to the second image, wherein the rotating shaft is parallel to the first axial direction;
D. after each optical lens rotates to a third position by taking the rotating shaft as an axis, capturing a third image by the image output by the image sensing element, and acquiring a third imaging point according to the third image, wherein the third position is different from the first position and the second position;
E. according to the first imaging point, the second imaging point and the third imaging point, calculating the circle center position of a circle passing through the first imaging point, the second imaging point and the third imaging point, wherein the circle center position corresponds to one of the at least two blocks;
F. dividing each optical lens into at least two types, wherein the center position of one type of optical lens corresponds to one of the at least two blocks, and the center position of the other type of optical lens corresponds to the other of the at least two blocks; and
an assembling step comprising:
and arranging at least two optical lenses belonging to one of at least two types of optical lenses in a lens barrel.
2. The method of claim 1, wherein the assembling step includes disposing at least two of the optical lenses belonging to another of the at least two classes in another barrel.
3. The method of claim 1, wherein step C is repeated to obtain a plurality of third image points, the plurality of third image points are different from each other, and step E comprises calculating a center position of a circle passing through the first image point, the second image point and the plurality of third image points according to the first image point, the second image point and the plurality of third image points.
4. The method of claim 1, wherein the at least one reference line comprises a first reference line and a second reference line, the first reference line and the second reference line perpendicularly intersect at the center point, and the reference plane is divided into a first block, a second block, a third block and a fourth block, and step F comprises classifying each of the optical lenses into four categories according to a block where the center of the circle of each of the optical lenses is located on the reference plane; and the assembling step includes disposing at least two of the optical lenses belonging to the first block type, the second block type, the third block type and the fourth block type in a lens barrel, respectively.
5. The method for assembling an optical lens system according to claim 1, wherein the image processing includes binarization processing, image dilation processing and image thinning processing, so as to obtain the first image point, the second image point and the third image point respectively.
6. The method for assembling an optical lens of claim 1, wherein the optical lens rotates 10-15 degrees from the first position to the second position.
7. The method for assembling an optical lens of claim 1, wherein the optical lens rotates 10-15 degrees from the second position to the third position.
8. The method of claim 1, wherein the optical lens assembly includes rotating each optical lens from the first position to the second position by a first angle, and rotating each optical lens from the second position to the third position by a second angle, wherein the first angle is equal to the second angle.
9. The method of claim 1, wherein the light source projects a cross beam along the first axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855207.2A CN114184353B (en) | 2020-08-24 | 2020-08-24 | Optical lens assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855207.2A CN114184353B (en) | 2020-08-24 | 2020-08-24 | Optical lens assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114184353A true CN114184353A (en) | 2022-03-15 |
| CN114184353B CN114184353B (en) | 2024-03-05 |
Family
ID=80600645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010855207.2A Active CN114184353B (en) | 2020-08-24 | 2020-08-24 | Optical lens assembly method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114184353B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987348A (en) * | 2005-12-23 | 2007-06-27 | 鸿富锦精密工业（深圳）有限公司 | Accentric detector |
| CN1996082A (en) * | 2006-01-05 | 2007-07-11 | 奥林巴斯株式会社 | Optical element position adjusting device |
| CN101069080A (en) * | 2004-12-03 | 2007-11-07 | 埃西勒国际通用光学公司 | Device for automatically measuring characteristics of an ophthalmic lens |
| JP2008014827A (en) * | 2006-07-06 | 2008-01-24 | Fujifilm Corp | Method and device for adjusting lens's decentration |
| CN103809818A (en) * | 2012-11-08 | 2014-05-21 | 纬创资通股份有限公司 | Method for judging whether lens device deviates and optical touch system thereof |
| CN104132620A (en) * | 2013-05-02 | 2014-11-05 | 鸿富锦精密工业（深圳）有限公司 | Lens optical axis offset measuring method |
| CN106572307A (en) * | 2016-11-01 | 2017-04-19 | 深圳岚锋创视网络科技有限公司 | Panoramic image generation method, panoramic image generation system and photographing device |
| CN107329225A (en) * | 2016-04-29 | 2017-11-07 | 上海微电子装备（集团）股份有限公司 | Edge-on microscope group and its installation method |
| US20190086632A1 (en) * | 2017-09-15 | 2019-03-21 | Primax Electronics Ltd. | Image focusing method, and image capture device and electronic device applying the same |
| TWM583937U (en) * | 2019-03-20 | 2019-09-21 | 宏碁股份有限公司 | Detection module |
| US20190302400A1 (en) * | 2018-03-30 | 2019-10-03 | Rays Optics Inc. | Optical lens and fabrication method thereof |
| CN110736610A (en) * | 2019-10-22 | 2020-01-31 | 歌尔股份有限公司 | Method and device for measuring optical center deviation, storage medium and depth camera |
| CN210427915U (en) * | 2019-09-06 | 2020-04-28 | 宁波舜宇光电信息有限公司 | Split type optical lens and camera module |
-
2020
- 2020-08-24 CN CN202010855207.2A patent/CN114184353B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069080A (en) * | 2004-12-03 | 2007-11-07 | 埃西勒国际通用光学公司 | Device for automatically measuring characteristics of an ophthalmic lens |
| CN1987348A (en) * | 2005-12-23 | 2007-06-27 | 鸿富锦精密工业（深圳）有限公司 | Accentric detector |
| CN1996082A (en) * | 2006-01-05 | 2007-07-11 | 奥林巴斯株式会社 | Optical element position adjusting device |
| JP2008014827A (en) * | 2006-07-06 | 2008-01-24 | Fujifilm Corp | Method and device for adjusting lens's decentration |
| CN103809818A (en) * | 2012-11-08 | 2014-05-21 | 纬创资通股份有限公司 | Method for judging whether lens device deviates and optical touch system thereof |
| CN104132620A (en) * | 2013-05-02 | 2014-11-05 | 鸿富锦精密工业（深圳）有限公司 | Lens optical axis offset measuring method |
| CN107329225A (en) * | 2016-04-29 | 2017-11-07 | 上海微电子装备（集团）股份有限公司 | Edge-on microscope group and its installation method |
| CN106572307A (en) * | 2016-11-01 | 2017-04-19 | 深圳岚锋创视网络科技有限公司 | Panoramic image generation method, panoramic image generation system and photographing device |
| US20190086632A1 (en) * | 2017-09-15 | 2019-03-21 | Primax Electronics Ltd. | Image focusing method, and image capture device and electronic device applying the same |
| US20190302400A1 (en) * | 2018-03-30 | 2019-10-03 | Rays Optics Inc. | Optical lens and fabrication method thereof |
| TWM583937U (en) * | 2019-03-20 | 2019-09-21 | 宏碁股份有限公司 | Detection module |
| CN210427915U (en) * | 2019-09-06 | 2020-04-28 | 宁波舜宇光电信息有限公司 | Split type optical lens and camera module |
| CN110736610A (en) * | 2019-10-22 | 2020-01-31 | 歌尔股份有限公司 | Method and device for measuring optical center deviation, storage medium and depth camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114184353B (en) | 2024-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI510770B (en) | Method for determining the tilt of an image sensor | |
| US7924418B2 (en) | Inspection apparatus and method | |
| WO2006138220A1 (en) | Method and apparatus for determining the straightness of tubes and bars | |
| CN114518220B (en) | Device for detecting a modulation transfer function and centering an optical system | |
| US9140545B2 (en) | Object inspection system | |
| CN101055256A (en) | Defect inspection apparatus | |
| JP5084327B2 (en) | Eccentricity inspection device and eccentricity adjustment device | |
| WO2016116036A1 (en) | Dual-optical-path optical centering instrument for eliminating stray light | |
| KR101126150B1 (en) | Lens meter | |
| KR20040093458A (en) | Device for examining end part | |
| CN101673043A (en) | Wide-angle distortion testing system and method | |
| CN2698097Y (en) | On-line circle optical projection detection device for tobacco industry | |
| CN114184353B (en) | Optical lens assembly method | |
| CN109596627B (en) | Printed product detection system that single-camera multi-angle detected | |
| TWI730880B (en) | Optical lens assembly method | |
| CN105092603A (en) | Online visual inspection device and method for inner walls of bowl-shaped workpieces | |
| JPS63191006A (en) | Apparatus for measuring shape of bent bar or bent tube | |
| JPH11326229A (en) | Foreign matter inspection apparatus | |
| JP2006091007A (en) | Hollow fiber membrane module inspection device | |
| JP2004294256A (en) | Container outline inspection apparatus | |
| KR19980076118A (en) | Focus-Resolution Inspection Mechanism and Method of Imager | |
| JPH07103740A (en) | Apparatus and method for detecting cylindrical object | |
| JP2020060480A (en) | Eccentricity measuring method | |
| JP6155924B2 (en) | Dimension measuring apparatus and dimension measuring method | |
| CN111385562B (en) | Method and device for correcting dynamic transfer function phase deviation of image sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |