CN1558289A - Cylinder imaging method - Google Patents
Cylinder imaging method Download PDFInfo
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- CN1558289A CN1558289A CNA2004100160238A CN200410016023A CN1558289A CN 1558289 A CN1558289 A CN 1558289A CN A2004100160238 A CNA2004100160238 A CN A2004100160238A CN 200410016023 A CN200410016023 A CN 200410016023A CN 1558289 A CN1558289 A CN 1558289A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 85
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000000007 visual effect Effects 0.000 claims description 11
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- 238000001514 detection method Methods 0.000 abstract 1
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Abstract
The cylindrical imaging method includes adopting one typical imaging system comprising lens and sensor, and setting one conic reflector with 90 deg apex angle and rotating axis coincident with main optical axis of the imaging system on the object space side of the lens, so that the objects around the conic reflector are reflected by the conic reflector and imaged by the imaging system while the objects in front of the main optical axis of the imaging system are blocked and not imaged. The objects in the cylindrical surface around the conic reflector are imaged in annular zone in the sensor, the radius of the imaging cylindrical surface may be regulated via focusing and the axial view angle of the cylindrical surface maybe regulated via altering the focus length of the imaging lens and the imaging area of the sensor, with the circumferencial direction being always 360 deg. The present invention is especially suitable for detection imaging of cylindrical inner wall.
Description
Technical field
The present invention relates to a kind of face of cylinder imaging method.
Background technology
General imaging system as not being considered to the depth of field factor of picture, is a plane by the imaging object plane all to the planar object imaging, also is the plane as the plane great majority.This class imaging system is to be suitable for fully to general application scenario.Except planar imaging, also have two kinds of imaging modes: a kind of is that 360 degree rotate panoramic imagery, and another kind is the hemisphere imaging.It is a kind of timesharing scanning imaging system that 360 degree rotate omnidirectional imaging system, need a rotary scanning mechanism, the rotation of assurance camera lens is moved synchronously with film and is carried out, it is the center of circle with the camera lens that the imaging surface of this system is one, optical axis direction (also being horizontal direction) object distance is the face of cylinder perpendicular to ground level of radius, is suitable for the shooting of group picture, large scene etc.The hemisphere imaging technique is the new technology that just occurs recently, and it can be disposable to the scenery blur-free imaging of hemisphere space, camera lens front from the same distance of camera lens, than general wide-angle, fish eye lens bigger field angle arranged.
But some subject, as column type inner-walls of duct such as gun barrel, sewer pipes etc., general plane imaging system just needs axially and two scanning systems of circumferencial direction, and imaging process is very slow; Omnidirectional imaging system is because itself be scanning imagery, and the axial scan of needs is the same with plane imaging system when adding the inner-walls of duct imaging, also is a two-dimensional scan process, and speed is slow; And the hemisphere imaging system is that hemisphere space, camera lens front is become sharply defined image from the scenery of the same distance of camera lens, and inner-walls of duct has only a very little circle rather than bigger one section can become sharply defined image, and the complex structure of hemisphere imaging system own, and cost is very high.Therefore there is not a kind of imaging system can be at present to the clear fast imaging of tubular articles inwall.
Summary of the invention
The purpose of this invention is to provide a kind of face of cylinder imaging method.
The technical solution of the face of cylinder of the present invention imaging is: an imaging system of typically being made up of camera lens and sensor, by object space one side a cone reflective mirror is installed at its camera lens, the turning axle of cone reflective mirror overlaps with the imaging system primary optical axis, make object around the cone reflective mirror after the cone reflection by the imaging system imaging, and the object in imaging system primary optical axis the place ahead be blocked can not imaging.
Usually, adopting drift angle is the cone reflective mirror of 90 degree, the turning axle of cone overlaps with primary optical axis, it just in time is 90 degree that object around the cone reflective mirror is turned to through the light path of cone reflection, by the imaging object plane is cone cylinder endless belt all around, and this cylinder endless belt center line overlaps with primary optical axis.
Imaging system of the present invention can be being that the object blur-free imaging on a face of cylinder in axle center is on each endless belt of sensor with the primary optical axis, this can be focused by camera lens by the radius size on the imaging face of cylinder and adjust, axial visual field angle, the face of cylinder can be adjusted by changing over as lens focus and sensor imaging surface size, and circumferencial direction is a complete week all the time, i.e. 360 degree.Be particularly suitable for the picture that is detected as of column type tubular articles inwall.
Characteristics of the present invention:
1) to be one be the face of cylinder in axle center with the primary optical axis to object to be imaged face, all can blur-free imaging from the whole face of cylinder of optical axis same distance, be particularly suitable for the picture that is detected as of column type tubular articles inwall;
2) can be focused by camera lens by the radius size on the imaging face of cylinder and adjust;
3) axial visual field angle in the face of cylinder can be adjusted by changing over as lens focus and sensor imaging surface size;
4) Polaroid just can be to a complete week of the face of cylinder, promptly the scanning motion of circumferencial direction has been removed in 360 degree imagings from, image taking speed improves greatly.
Description of drawings
Fig. 1 is the principle schematic of the inventive method;
Fig. 2 is the object plane and the image planes corresponding relation of the face of cylinder of the present invention formation method, and Fig. 2 a is an object plane, promptly by the imaging FAST plot, Fig. 2 b be become the image synoptic diagram;
During Fig. 3 different focus position, by the face of cylinder change in radius synoptic diagram of blur-free imaging;
The variation at face of cylinder axial visual field angle when Fig. 4 is the imaging lens different focal.
Embodiment
The face of cylinder formation method that the present invention proposes, its principle is with reference to Fig. 1, an imaging system of typically forming by sensor 1 and camera lens 2, its camera lens is installed a cone reflective mirror 3 by object space one side, shown in the legend, what install is that a drift angle is the cone reflective mirror of 90 degree, the turning axle of cone reflective mirror overlaps with primary optical axis, use OO ' expression among the figure, make object on the face of cylinder 4 around the cone after the cone reflection by the imaging system imaging, and the object in imaging system primary optical axis OO ' the place ahead be blocked can not imaging.Imaging system of the present invention can be the one section object that with the primary optical axis is a face of cylinder in axle center, and 5 is imaging region among the figure, and whole section face of cylinder blur-free imaging from AA ' annulus to BB ' annulus is on each endless belt of sensor.
The present invention face of cylinder object image-forming on the annulus of plane image-position sensor, as shown in Figure 2.Fig. 2 a is an object plane, is represented with stretch-out view by the imaging face of cylinder; Fig. 2 b is image planes.Imaging system is imaged on each circle of object space on the endless belt on the sensor as the scenery among the figure " ABCDEFGHIJKLMNOP ", and the annulus of object space diverse location becomes the endless belt of different radii in picture side.Obviously the image enlargement ratio is uneven, but is clocklike, can proofread and correct with software.
Adopt the face of cylinder of the present invention formation method, can be focused by camera lens by the radius size on the imaging face of cylinder, promptly the relative position of camera lens focal plane and sensor is adjusted, as shown in Figure 3.Track out, promptly when focusing than far object, the face of cylinder radius of blur-free imaging is just bigger, (shown in Fig. 3 a); And the camera lens reach, when promptly closer objects being focused, the face of cylinder radius of blur-free imaging is just smaller, (shown in Fig. 3 b).
The face of cylinder of the present invention method, its axial visual field angle, face of cylinder can be adjusted by changing over as lens focus and sensor imaging surface size, and circumferencial direction is a complete week all the time, promptly 360 spend.Fig. 4 signal relation between imaging lens focal length and the axial visual field angle, the face of cylinder of having drawn.Fig. 4 a is the relatively shorter situation of lens focus, and imaging region is bigger, and promptly the axial visual field angle is bigger; Fig. 4 b is the long situation of lens focus, and imaging region is smaller, and promptly the axial visual field angle is smaller.Different application systems can design the imaging lens of different focal as required, to obtain different axial visual field angles.With 1/3 " CCD is example as the image planes sensor, and when the imaging lens focal length was 6 millimeters, obtaining the axial visual field angle was 33 degree, and when the imaging lens focal length was 20 millimeters, the axial visual field angle only was 10 degree.And the circumferencial direction field angle is always 360 degree.
The face of cylinder formation method that the present invention proposes is particularly suitable for the picture that is detected as of column type tubular articles inwall.
Claims (4)
1. face of cylinder imaging method, it is characterized in that, an imaging system of typically forming by camera lens (2) and sensor (1), by object space one side a cone reflective mirror (3) is installed at its camera lens (2), the turning axle of cone reflective mirror overlaps with the imaging system primary optical axis, make object around the cone reflective mirror after the cone reflection by the imaging system imaging, and the object in imaging system primary optical axis the place ahead be blocked can not imaging.
2. the face of cylinder according to claim 1 imaging method, it is characterized in that, the drift angle of described cone reflective mirror is 90 degree, it just in time is 90 degree that object around the cone reflective mirror is turned to through the light path of cone reflection, by the imaging object plane is cone cylinder endless belt all around, and this cylinder endless belt center line overlaps with primary optical axis.
3. the face of cylinder according to claim 1 imaging method is characterized in that, with changing over the axial visual field angle, the face of cylinder that is adjusted to picture as lens focus and sensor imaging surface size.
4. the face of cylinder according to claim 1 imaging system is characterized in that, is adjusted to the face of cylinder radius size of picture with the relative position that changes camera lens focal plane and sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100160238A CN1558289A (en) | 2004-01-18 | 2004-01-18 | Cylinder imaging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100160238A CN1558289A (en) | 2004-01-18 | 2004-01-18 | Cylinder imaging method |
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| Publication Number | Publication Date |
|---|---|
| CN1558289A true CN1558289A (en) | 2004-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2004100160238A Pending CN1558289A (en) | 2004-01-18 | 2004-01-18 | Cylinder imaging method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135707A (en) * | 2011-01-30 | 2011-07-27 | 广州市晶华光学电子有限公司 | Automatic induction and photo-taking camera |
| CN107003601A (en) * | 2014-09-25 | 2017-08-01 | 球面光学有限公司 | Omnirange refracting-reflecting lens structure |
| CN108604055A (en) * | 2015-12-28 | 2018-09-28 | 球面光学有限公司 | Omnidirection refringent/reflection lens with odd item aspherical profile or poly-lens |
-
2004
- 2004-01-18 CN CNA2004100160238A patent/CN1558289A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135707A (en) * | 2011-01-30 | 2011-07-27 | 广州市晶华光学电子有限公司 | Automatic induction and photo-taking camera |
| CN102135707B (en) * | 2011-01-30 | 2012-08-01 | 广州市晶华光学电子有限公司 | Automatic induction and photo-taking camera |
| CN107003601A (en) * | 2014-09-25 | 2017-08-01 | 球面光学有限公司 | Omnirange refracting-reflecting lens structure |
| CN107003601B (en) * | 2014-09-25 | 2019-09-17 | 球面光学有限公司 | Omnidirection refracting-reflecting lens structure |
| CN108604055A (en) * | 2015-12-28 | 2018-09-28 | 球面光学有限公司 | Omnidirection refringent/reflection lens with odd item aspherical profile or poly-lens |
| CN108604055B (en) * | 2015-12-28 | 2021-05-25 | 球面光学有限公司 | Omnidirectional catadioptric lens with odd-order aspheric profile or multiple lenses |
| US11137582B2 (en) | 2015-12-28 | 2021-10-05 | Spere Optics Company, Llc | Omnidirectional catadioptric lens with odd aspheric contour or multi-lens |
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