CN106226327A - A kind of cambered surface external surface of objects defect inspection method and system - Google Patents
A kind of cambered surface external surface of objects defect inspection method and system Download PDFInfo
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- CN106226327A CN106226327A CN201610779961.6A CN201610779961A CN106226327A CN 106226327 A CN106226327 A CN 106226327A CN 201610779961 A CN201610779961 A CN 201610779961A CN 106226327 A CN106226327 A CN 106226327A
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- 230000007547 defect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007689 inspection Methods 0.000 title claims abstract description 14
- 238000003384 imaging method Methods 0.000 claims abstract description 40
- 238000005286 illumination Methods 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 9
- 230000003321 amplification Effects 0.000 abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 17
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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Abstract
The present invention is about a kind of cambered surface external surface of objects defect inspection method and system, concrete, within the cambered surface of cambered surface object is placed in the focus of concave mirror, and provide illumination by light source for detecting system, utilize concave mirror that the cambered surface of cambered surface object is carried out imaging amplification, and by concave mirror, image collecting device and the Position Design of the cambered surface of cambered surface object, by the picture conversion of tested cambered surface to suitable angle, make the virtual image in concave mirror of the image acquisition device tested cambered surface.Owing to tested cambered surface is in the virtual image that concave mirror imaging is amplification, according to image-forming principle, the curvature of this virtual image is less than the curvature of tested cambered surface, and the arc of this virtual image to central angle less than tested cambered surface arc institute to central angle, so the cambered surface external surface of objects defect inspection method utilizing the present embodiment to provide, the imaging edge compression problem of image collecting device can be alleviated.
Description
Technical field
The present invention relates to Electrooptical devices detection technique field, particularly relate to a kind of cambered surface external surface of objects defects detection side
Method and system.
Background technology
In the industrial production, owing to the outer surface of product exists defects such as producing defect (such as pit, projection) or scuffing,
Therefore, for ensureing product quality, generally use industrial camera that the outer surface of product is adopted figure detection, to be existed by outer surface
The product of defect carries out picking picking.
In prior art, a lot of equipment are for pursuit aesthetic appearance and grip comfort, its product such as shell and screen
Corner all can be designed with the cambered surface of certain radian.Owing to the depth of field of traditional camera lens is limited, so the arc to object
When face carries out adopting figure, camera cannot by being imaged on a little on same focusing plane in cambered surface, and then cause locating in whole cambered surface
Part imaging clearly in focusing plane and to be in the part imaging beyond focal plane unintelligible.For these reasons, prior art
In, generally use telecentric lens that the cambered surface of cambered surface product is adopted figure, utilize telecentric lens to have the feature of the ultra-wide depth of field, come
Ensure that the various piece of cambered surface all can blur-free imaging.
But, either conventional lenses or big depth of field camera lens, its lens focusing face is plane, so causing cambered surface
Imaging is compressed, and, when cambered surface the biggest or same arc length its circular arc curvature of cambered surface of arc chord angle the biggest time,
Imaging compression situation near cambered surface edge is the most serious.So, above-mentioned imaging compression can make the actual size of cambered surface and become film size
Face size is the most corresponding, causes getting the wrong sow by the ear the flaw size in cambered surface, and defect is difficult to be identified, and then causes accuracy of detection relatively
Low.It addition, when the arc sizes of product is bigger, need to customize the big depth of field camera lens of big clear aperture, its price is the highest,
And then cause production cost to improve.
Summary of the invention
For overcoming problem present in correlation technique, the present invention provide a kind of cambered surface external surface of objects defect inspection method and
System.
First aspect according to embodiments of the present invention, it is provided that a kind of cambered surface external surface of objects defect detecting system, including:
Light source, for providing illumination for described detecting system, the cambered surface of cambered surface object is positioned at the irradiation area of described light source
In the range of；
Concave mirror, for described cambered surface being drawn into picture, described cambered surface be positioned at the focus of described concave mirror with
In, the radius of curvature of described cambered surface is less than or equal to institute less than the radius of curvature of described concave mirror, the arc length of described cambered surface
State the arc length of concave mirror, between optical axis and the axis of described cambered surface of described concave mirror, there is certain angle；
Image collecting device, is used for gathering described cambered surface imaging in described concave mirror, described image acquisition
Between optical axis and the axis of described cambered surface of device, there is certain angle.
Preferably, described concave mirror is made up of, wherein two or more concave reflection mirror units:
In described concave mirror, the curvature of concave surface mirror unit is along with described concave reflection mirror unit and described cambered surface
Between the increase of spacing and gradually decrease；
Point in described cambered surface lays respectively in the focal range of concave reflection mirror unit that described point carries out imaging.
Preferably, described light source is concave surface annular light source, and the concave surface light-emitting area of described concave surface annular light source is towards described arc
Face.
Preferably, described light source is made up of, wherein three concave surface annular light sources:
Three described concave surface annular light sources, along the circular arc direction arrangement of described cambered surface, are respectively used to irradiate the two of described cambered surface
Edge area and central area.
Preferably, the radius of curvature of described concave mirror is 3～20 times of described cambered surface radius of curvature.
Preferably, the angle between optical axis and the axis of described cambered surface of described concave mirror is 15 °～50 °, institute
State the angle 65 °～100 ° between the optical axis of image collecting device and the axis of described cambered surface.
Preferably, the angle number of degrees between optical axis and the axis of described cambered surface of described concave mirror be 30 °～
45 °, the angle between optical axis and the axis of described cambered surface of described image collecting device 85 °～100 °.
Preferably, described concave mirror is arranged on described image collecting device by connector.
Second aspect according to embodiments of the present invention, it is provided that a kind of cambered surface external surface of objects defect inspection method, utilizes this
The arbitrary described detecting system of inventive embodiments first aspect, including:
Light source is utilized to irradiate the cambered surface of cambered surface object, in the range of described cambered surface is positioned at the irradiation area of described light source；
Utilize concave mirror that described cambered surface carries out imaging, wherein, described cambered surface picture in described concave mirror
For the virtual image amplified；
Utilize the formed virtual image in described concave mirror of cambered surface described in image acquisition device, obtain described cambered surface
Detection image.
Preferably, utilize the formed virtual image in described concave mirror of cambered surface described in image acquisition device, including:
Utilize area array cameras to shoot the formed virtual image in described concave mirror of described cambered surface, or utilize line-scan digital camera
Scan the formed virtual image in described concave mirror of described cambered surface.
From above technical scheme, a kind of cambered surface external surface of objects defect inspection method that the embodiment of the present invention provides and
System, within the cambered surface of cambered surface object is placed in the focus of concave mirror, and provides illumination, profit by light source for detecting system
With concave mirror, the cambered surface of cambered surface object carried out imaging amplification, and by concave mirror, image collecting device and arc
The Position Design of the cambered surface of face object, by the picture conversion of tested cambered surface to suitable angle, makes image acquisition device cambered surface
Picture in concave mirror.Owing to tested cambered surface is in the virtual image that concave mirror imaging is amplification, according to image-forming principle,
The curvature of this virtual image less than the curvature of tested cambered surface, and the arc of this virtual image institute to central angle less than tested cambered surface arc to circle
Heart angle, the flattening so tested cambered surface formed the most tested cambered surface of the virtual image in concavees lens is stretched, and then alleviate image acquisition
The imaging edge compression problem of device.
It should be appreciated that it is only exemplary and explanatory, not that above general description and details hereinafter describe
The present invention can be limited.
Accompanying drawing explanation
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the present invention
Example, and for explaining the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 shows for the first basic structure of a kind of cambered surface external surface of objects defect detecting system that the embodiment of the present invention provides
It is intended to；
Fig. 2 shows for the second basic structure of a kind of cambered surface external surface of objects defect detecting system that the embodiment of the present invention provides
It is intended to；
The schematic flow sheet of a kind of cambered surface external surface of objects defect inspection method that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the present invention.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the present invention are consistent.
The embodiment of the present invention utilizes the amplification image-forming principle of reflecting mirror, uses concave mirror the cambered surface of cambered surface object to be entered
Row zooms into picture, makes tested cambered surface imaging in concave mirror the most tested cambered surface flexibility reduce, and then alleviates image and adopt
The imaging edge compression problem of acquisition means.
See Fig. 1, a kind of cambered surface external surface of objects defect detecting system provided for the embodiment of the present invention first basic
Structural representation, this system includes light source, concave mirror 2 and image collecting device 3.
Concrete, light source is for providing illumination for described detecting system, and the cambered surface 41 of tested cambered surface object 4 is positioned at described light
In the range of the irradiation area in source, the present embodiment illustrates as a example by right angle cambered surface object, and the central angle that i.e. its cambered surface is corresponding is
As a example by 90 °, but be not limited to this face type, it is also possible to for other cambered surface object at any angle, and to off-gauge elliptic arc,
Curve arc etc..Meanwhile, concave mirror 2 is also not limited to the concave mirror 2 of sphere, it is also possible to be designed as other face type,
And also can be to be made up of multiple concave reflection mirror units, wherein, when concave mirror is by multiple concave reflection mirror unit groups
Cheng Shi, owing to each concave reflection mirror unit has a focus, so its focus is become by Duo Gezi focal group.
Concave mirror 2 is for being drawn into picture to cambered surface 41, wherein, amplifies image-forming condition, cambered surface 41 according to reflecting mirror
Within the focus of concave mirror 2, so, cambered surface 41 imaging in concave mirror 2 is just the virtual image of upright amplification.
Surface structure feature according to cambered surface 41, the spacing between point and the concave mirror of the diverse location in cambered surface 41
And differ, (i.e. meet into amplification empty for the focus making all diverse location points in cambered surface 41 be in concave mirror 2
Slice part), so the radius of curvature of cambered surface 41 is less than the radius of curvature of concave mirror 2 in the present embodiment；Meanwhile, in order to make arc
Face 41 can in concave mirror 2 can complete imaging, and the arc length of cambered surface 41 is less than or equal to the arc length of concave mirror.
For enabling cambered surface 41 imaging in concave mirror 2 to be collected by image collecting device 3, concave mirror
Between optical axis and the axis of cambered surface 41 of 2, there is certain angle.
Image collecting device 3 is used for gathering cambered surface 41 imaging in concave mirror 2, same, image collector
Put and also there is between the optical axis of 3 and the axis of cambered surface certain angle.
See Fig. 2, a kind of cambered surface external surface of objects defect detecting system provided for the embodiment of the present invention second basic
Structural representation, it is contemplated that system components be prone to layout property, the optical axis of concave mirror 2 and cambered surface 41 in the present embodiment
Angle theta 1 between axis is 15 °～50 °, the angle theta 2 between optical axis and the axis of cambered surface 41 of image collecting device 3
It is 65 °～100 °, corresponding right angle cambered surface object in the present embodiment, the optical axis of concave mirror 2 and tested cambered surface object 4
The angle of vertical edges (Y-axis) be 15 °～50 °, the vertical edges (Y-axis) of the optical axis of image collecting device 3 and tested cambered surface object 4
Angle be 50 °～85 °.
Further, for making system arrange the compactest, to ensure to gather image effect, the light of concave mirror 2 simultaneously
The angle number of degrees between the axis of axle and cambered surface 41 are 30 °～45 °, the optical axis of image collecting device 3 and the axis of cambered surface 41
Angle between line 85 °～100 °, corresponding right angle cambered surface object in the present embodiment, the optical axis of concave mirror 2 is with tested
The angle of the vertical edges (Y-axis) of cambered surface object 4 is 10 °～25 °, the optical axis of image collecting device 3 and hanging down of tested cambered surface object 4
The angle of straight flange (Y-axis) is 70 °～85 °.
In the present embodiment, owing to having certain angle, institute between optical axis and the axis of cambered surface 41 of concave mirror 2
Different, according to concave mirror imaging formula with the spacing between two ends and the concave mirror 2 of cambered surface:
In formula (1), u is object distance, i.e. object to the distance on concave mirror summit, and v is that image distance, i.e. imaging are to the most recessed
The distance on reflecting mirror summit, face, f is the focal length on concave mirror summit, and R is the radius of curvature of concave mirror, concave mirror
The relation of focal length and its radius of curvature be
Meanwhile, the vertical axle amplification formula of concave mirror imaging:
According to formula (1) and (2), can draw the cambered surface focus the closer to concave mirror, its amplification is the biggest, formed
The virtual image is the biggest, so the spacing between the two ends of cambered surface from concave mirror 2 is different, cambered surface 41 can be caused at concave mirror
In 2, imaging is asymmetric, brings difficulty to follow-up graphical analysis.
In order to solve the problems referred to above, in the present embodiment, concave mirror 2 is designed as by two or more concave surfaces
Mirror unit is spliced to form, and wherein, in concave mirror 2, the curvature of concave surface mirror unit is along with this concave reflection mirror unit
And the increase of spacing between cambered surface and gradually decrease, i.e. in concave mirror 2 radius of curvature of concave surface mirror unit along with this
The increase of spacing between concave reflection mirror unit and cambered surface and be gradually increased, each point of cambered surface 41 is also corresponding to be positioned at its imaging
Concave reflection mirror unit focal range in, and then can make up above-mentioned because of positions different in cambered surface 41 and concave mirror
The asymmetric problem of imaging that spacing difference between 2 causes, is finally reached the effect that whole cambered surface amplification is more consistent.
Need explanation, in concave mirror 2 each concave reflection mirror unit can be independent structure can also be one
The structure of molding, the present embodiment is not specifically limited at this.
Further, due to the focal length of concave mirror with the relation of its radius of curvature it isSo concave mirror
The radius of curvature of 2 is the biggest, and its focal length corresponding is the biggest.According to above-mentioned analysis, for making cambered surface 41 more by Jiao of concave mirror 2
Point, obtains bigger amplification, and the radius of curvature of concave mirror 2 is the biggest, the spacing between cambered surface 41 and concave mirror 2
The biggest, the space that whole system takies also can become big, so taking up room for saving system, it should meeting image-forming condition
Under, that the radius of curvature of concave mirror 2 is designed is the least.
Meanwhile, according to imaging formula (1) and (2), the condition that spacing between cambered surface 41 with concave mirror 2 is identical
Under, the radius of curvature of concave mirror 2 is the biggest, and the vertical axle amplification of concave mirror imaging is the biggest.
Consider above-mentioned two factor, in the present embodiment, the radius of curvature of concave mirror 2 is designed as cambered surface 41 bent
3～20 times of rate radius.
The light launched due to the light source of planar structure more dissipates, it is impossible to enough is selectively system light filling, so
Light source design is concave surface annular light source by the present embodiment, and the concave surface light-emitting area of concave surface annular light source is towards cambered surface 41 simultaneously.Utilize
Light can preferably be reflected into image collecting device 3 by concave surface annular light source, can preferably the defect on cambered surface 41 surface be shown
Come.
In conjunction with the flexure plane type feature of cambered surface, for making the institute in cambered surface 41 a little can be illuminated uniformly, Yi Jigeng
Facilitate the layout of system and device, as it is shown in figure 1, light source is made up of three concave surface annular light sources in the present embodiment, respectively first
Concave surface annular light source the 1, second concave surface annular light source 2 and the 3rd concave surface annular light source 3, three described concave surface annular light sources are along described
The circular arc direction arrangement of cambered surface, is respectively used to irradiate the region, both sides of the edge of described cambered surface and central area, further, above-mentioned
Three concave surface annular light sources can also be made up of two or more concave surface annular light source unit.
In the alternatively possible implementation that the embodiment of the present invention provides, concave mirror 2 can also be by connecting
Part is arranged on described image collecting device, selects suitable image sensor size, can realize the Polaroid of cambered surface object,
Improve detection efficiency, reduce equipment complexity.
Utilizing said system, the present embodiment to additionally provide a kind of cambered surface external surface of objects defect inspection method, Fig. 3 is this
The schematic flow sheet of a kind of cambered surface external surface of objects defect inspection method that bright embodiment provides, described method specifically includes as follows
Step:
S110；Light source is utilized to irradiate the cambered surface of cambered surface object, in the range of described cambered surface is positioned at the irradiation area of described light source.
Concrete, utilize light source to irradiate detected cambered surface, make enough light reflect into image collecting device, make image adopt
Acquisition means can collect image the most clearly.
S120: utilizing concave mirror that described cambered surface carries out imaging, wherein, described cambered surface is in described concave mirror
As for amplify the virtual image.
Concrete, tested cambered surface is arranged in the focal range of concave mirror, according to mirror imager condition, tested
Cambered surface can become the virtual image amplified in concave mirror.
Wherein, state because of the different imaging caused of the spacing between positions different in cambered surface and concave mirror to make up
Asymmetric problem, in the present embodiment, concave mirror is made up of multiple concave reflection mirror units, and concave mirror concave
The radius of curvature of face mirror unit along with between this concave reflection mirror unit and tested cambered surface the increase of spacing and be gradually increased,
By multiple concave reflection mirror units, cambered surface carrying out imaging, each point of same tested cambered surface is also corresponding, and to be positioned at each concave surface anti-
Penetrate in the focal range of mirror unit.
At the same time it can also be require and the virtual image according to the amplification of tested cambered surface become virtual image in concave mirror
Curvature requirement, to the position relationship between tested cambered surface and concave mirror and to the radius of curvature of concave mirror, face
Types etc. are designed.
S130: utilize the formed virtual image in described concave mirror of cambered surface described in image acquisition device, obtain institute
State the detection image of cambered surface.
Wherein, the structure according to tested cambered surface is different, and the tested cambered surface of different image acquisition device can be used to exist
The formed virtual image in concave mirror, such as, when the length of cambered surface object is longer, it is possible to use line-scan digital camera scanning scans frame by frame
Tested cambered surface is the formed virtual image in concave mirror, then told subsequent treatment and obtains the complete image of tested cambered surface；Work as arc
When face object is shorter, then can directly utilize area array cameras and shoot tested cambered surface formed void in described concave mirror
Picture.
From above technical scheme, the present invention provides a kind of cambered surface external surface of objects defect inspection method and system, will
Within the cambered surface of cambered surface object is placed in the focus of concave mirror, and provide illumination by light source for detecting system, utilize concave surface
Reflecting mirror carries out imaging amplification to the cambered surface of cambered surface object, then, by concave mirror, image collecting device and cambered surface thing
The Position Design of the cambered surface of body, by the picture conversion of tested cambered surface to suitable angle, makes image acquisition device cambered surface recessed
Picture in the reflecting mirror of face.
At the same time it can also be according to demand to the position relationship between tested cambered surface and concave mirror and to concave surface
The radius of curvature of reflecting mirror, face type etc. are designed, and so can realize there is tested cambered surface imaging putting in various degree
Big stretching, such as, making tested cambered surface imaging in concave mirror is plane.
According to first-order theory, the image axle amplification that hangs down is: β=y '/y=-(f/x), and wherein, f is concave mirror focal length,
X is the cambered surface distance to focus, and within being positioned at the focus of concave mirror due to tested cambered surface, therefore f is more than x, so cambered surface
Vertical axle amplification more than 1, simultaneously as image angular magnification is the inverse of axle amplification of hanging down, so the angle of tested surface is amplified
Rate is less than 1, and therefore, tested cambered surface is the virtual image amplified in concave mirror imaging, and, the curvature of this virtual image is less than quilt
Survey cambered surface curvature, the arc of this virtual image institute to central angle less than tested cambered surface arc institute to central angle, and then tested cambered surface process
After concave mirror zooms into picture, the imaging edge compression problem of image collecting device can be alleviated.
It addition, the present embodiment additionally provides the structure that concave mirror is formed by concave mirror unit spliced, by recessed
The face type design of face mirror unit, changes the image space of the different piece of tested cambered surface, and the circular arc making the become virtual image is corresponding
Rise corresponding to the most tested cambered surface of rise reduce, and then make the most tested cambered surface of the become virtual image be stretched flattening, so adopting
With common lens to this virtual image process image acquisition, the various piece of the tested cambered surface correspondence virtual image just can be made all clearly to become
Picture, therefore, can reduce production cost in the case of ensureing Detection results.
Those skilled in the art, after considering the invention that description and practice are invented here, will readily occur to its of the present invention
Its embodiment.The application is intended to any modification, purposes or the adaptations of the present invention, these modification, purposes or
Person's adaptations is followed the general principle of the present invention and includes the common knowledge in the art that the present invention does not invents
Or conventional techniques means.Description and embodiments is considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in precision architecture described above and illustrated in the accompanying drawings, and
And various modifications and changes can carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a cambered surface external surface of objects defect detecting system, it is characterised in that including:
Light source, for providing illumination for described detecting system, the cambered surface (41) of cambered surface object (4) is positioned at the irradiated region of described light source
In the range of territory；
Concave mirror (2), for described cambered surface (41) is drawn into picture, described cambered surface (41) is positioned at described concave mirror
(2), within focus, the radius of curvature of described cambered surface (41) is less than the radius of curvature of described concave mirror (2), described cambered surface
(41) arc length is less than or equal to the arc length of described concave mirror (2), the optical axis of described concave mirror (2) and described cambered surface
(41) there is between axis certain angle；
Image collecting device (3), is used for gathering described cambered surface (41) imaging, described figure in described concave mirror (2)
As there is certain angle between optical axis and the axis of described cambered surface (41) of harvester (3).
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described concave mirror
(2) it is made up of, wherein two or more concave reflection mirror units:
In described concave mirror (2), the curvature of concave surface mirror unit is along with described concave reflection mirror unit and described cambered surface
(41) increase of spacing between and gradually decrease；
Point in described cambered surface (41) lays respectively in the focal range of concave reflection mirror unit that described point carries out imaging.
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described light source is concave surface ring
Shape light source, the concave surface light-emitting area of described concave surface annular light source is towards described cambered surface (41).
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described light source is recessed by three
Face annular light source composition, wherein:
Three described concave surface annular light sources, along the circular arc direction arrangement of described cambered surface (41), are respectively used to irradiate described cambered surface (41)
Region, both sides of the edge and central area.
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described concave mirror
(2) radius of curvature is 3～20 times of described cambered surface (41) radius of curvature.
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described concave mirror
(2) the angle between optical axis and the axis of described cambered surface (41) is 15 °～50 °, the optical axis of described image collecting device (3)
And the angle between the axis of described cambered surface (41) 65 °～100 °.
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described concave mirror
(2) the angle number of degrees between optical axis and the axis of described cambered surface (41) are 30 °～45 °, described image collecting device (3)
Angle between the axis of optical axis and described cambered surface (41) 85 °～100 °.
Cambered surface external surface of objects defect detecting system the most according to claim 1, it is characterised in that described concave mirror
(2) it is arranged on described image collecting device (3) by connector.
9. a cambered surface external surface of objects defect inspection method, it is characterised in that utilize the arbitrary described detection of claim 1-8
System, including:
Light source is utilized to irradiate the cambered surface of cambered surface object, in the range of described cambered surface is positioned at the irradiation area of described light source；
Utilizing concave mirror that described cambered surface carries out imaging, wherein, described cambered surface picture in described concave mirror is for putting
The big virtual image；
Utilize the formed virtual image in described concave mirror of cambered surface described in image acquisition device, obtain the inspection of described cambered surface
Altimetric image.
Cambered surface external surface of objects defect inspection method the most according to claim 9, it is characterised in that utilize image acquisition
Device gathers the formed virtual image in described concave mirror of described cambered surface, including:
Utilize area array cameras to shoot the formed virtual image in described concave mirror of described cambered surface, or utilize line-scan digital camera to scan
Described cambered surface is the formed virtual image in described concave mirror.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107203994A (en) * | 2017-06-08 | 2017-09-26 | 广东嘉铭智能科技有限公司 | A kind of method and apparatus of globoidal glass curvature measuring |
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| CN112504170A (en) * | 2020-11-11 | 2021-03-16 | 青岛海信宽带多媒体技术有限公司 | Concentricity testing method |
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| CN107203994A (en) * | 2017-06-08 | 2017-09-26 | 广东嘉铭智能科技有限公司 | A kind of method and apparatus of globoidal glass curvature measuring |
| CN107203994B (en) * | 2017-06-08 | 2021-03-26 | 广东嘉铭智能科技有限公司 | Method and device for detecting curvature of curved glass |
| CN107328789A (en) * | 2017-06-23 | 2017-11-07 | 宁波韵升智能技术有限公司 | A kind of arc surface and surface defect detecting system |
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| WO2020147397A1 (en) * | 2019-01-17 | 2020-07-23 | 东莞市三姆森光电科技有限公司 | Machine vision system for use in curved surface inspection and inspection method |
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| CN115128885A (en) * | 2022-07-27 | 2022-09-30 | 深圳市梯易易智能科技有限公司 | Multi-lens reflection type cylindrical surface imaging method |
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