CN104360460A - Machine vision camera lens with 8mm fixed focus - Google Patents
Machine vision camera lens with 8mm fixed focus Download PDFInfo
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- CN104360460A CN104360460A CN201410711287.9A CN201410711287A CN104360460A CN 104360460 A CN104360460 A CN 104360460A CN 201410711287 A CN201410711287 A CN 201410711287A CN 104360460 A CN104360460 A CN 104360460A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0075—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having an element with variable optical properties
Abstract
The invention belongs to the technical field of machine vision camera lenses and particularly relates to a machine vision camera lens with an 8mm fixed focus. The machine vision camera lens comprises a first lens with a concave-convex structure, a second lens with a double-concave structure, a third lens with a concave-convex structure, a fourth lens with a double-convex structure, a fifth lens with a double-convex structure, a sixth lens with a double-concave structure, a seventh lens with a concave-convex structure and an eighth lens with a double-convex structure, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged in a way that the central shafts are coaxial along the light-incident direction; due to the combination of the eight lenses, the pixel value of the camera lens with the 8mm focus can be up to 5 megapixels when the size of a corresponding chip is 2/3', so that the high-end product demand is met; and meanwhile, the clear aperture is adjustable within the range of F2.5-F16. The machine vision camera lens with the 8mm fixed focus is compact in structure, convenient to assemble and capable of reducing the production cost.
Description
Technical field
The invention belongs to machine visual lens technical field, be specifically related to 8mm focusing machine visual lens.
Background technology
Machine vision replaces human eye measure and judge with machine exactly.Vision Builder for Automated Inspection refers to by machine vision product (i.e. image-pickup device, point CMOS and CCD two kinds) target will be ingested convert picture signal to, send special image processing system to, according to pixel distribution and the information such as brightness, color, be transformed into digitized signal; Picture system carries out various computing to extract clarification of objective to these signals, and then controls on-the-spot device action according to the result differentiated.
In recent years, along with the fast development of microelectronics industry, high resolving power, the Vision Builder for Automated Inspection of high processing rate is constantly born, and this proposes new requirement to optical lens supporting with it.And for the machine visual lens of domestic existing 8mm focal length, corresponding chip size is 2/3 " time, pixel does not reach 500 ten thousand, cannot meet high-end product demand.
Therefore, urgently a kind of is 2/3 at chip size " time, pixel energy reaches the machine visual lens of 500 ten thousand.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and provide 8mm focusing machine visual lens, this lens focus is 8mm, when corresponding chip size is 2/3 " time, its pixel value can reach 5 mega pixels, can meet high-end product demand; Its clear aperature is adjustable within the scope of F2.5 ~ F16 simultaneously.
To achieve these goals, the present invention adopts following technical scheme: 8mm focusing machine visual lens, comprises the first lens setting gradually the coaxial concaveconvex structure of central shaft along light direction, second lens of double-concave structure, 3rd lens of concaveconvex structure, 4th lens of biconvex structure, 5th lens of biconvex structure, 6th lens of double-concave structure, 7th lens of concaveconvex structure and the 8th lens of biconvex structure, the radius of described first lens front curved surface is 21.99 ± 0.1mm, the radius of rear end surface is 8.185 ± 0.1mm, thickness b1 is 6.143 ± 0.03mm, and the radius of described second lens front curved surface is 49.656 ± 0.1mm, the radius of rear end surface is 13.7 ± 0.1mm, thickness b2 is 1.053 ± 0.02mm, and the radius of described 3rd lens front curved surface is 33.738 ± 0.1mm, the radius of rear end surface is 18.924 ± 0.1mm, thickness b3 is 8.673 ± 0.03mm, and the radius of described 4th lens front curved surface is 20.732 ± 0.1mm, the radius of rear end surface is 20.732 ± 0.1mm, thickness b4 is 9.966 ± 0.03mm, and the radius of described 5th lens front curved surface is 19.285 ± 0.1mm, the radius of rear end surface is 6.861 ± 0.1mm, thickness b5 is 2.904 ± 0.03mm, and the radius of described 6th lens front curved surface is 6.861 ± 0.1mm, the radius of rear end surface is 13.05 ± 0.1mm, thickness b6 is 2.977 ± 0.03mm, and the radius of described 7th lens front curved surface is 45.45 ± 0.1mm, the radius of rear end surface is 12 ± 0.1mm, thickness b7 is 2.11 ± 0.03mm, and the radius of described 8th lens front curved surface is 25.965 ± 0.1mm, the radius of rear end surface is 25.965 ± 0.1mm, thickness b8 is 3.205 ± 0.03mm, the spacing d1 of described first lens and described second lens is 2.942mm, the spacing d2 of described second lens and described 3rd lens is 1.713mm, the spacing d3 of described 3rd lens and described 4th lens is 2.416mm, and the spacing d6 of described 6th lens and described 7th lens is 2.618mm.
One as 8mm focusing machine visual lens of the present invention is improved, diaphragm is provided with between described 4th lens and described 5th lens, the spacing d4 of described 4th lens and described diaphragm is 5.87mm, and the spacing d5 of described diaphragm and described 4th lens is 1.167mm.
One as 8mm focusing machine visual lens of the present invention is improved, and described diaphragm light hole is adjustable, and the light hole adjustable extent of described diaphragm is 0.8mm ~ 5.8mm.
One as 8mm focusing machine visual lens of the present invention is improved, and described 5th lens and described 6th lens are glued together by optical glue.
One as 8mm focusing machine visual lens of the present invention is improved, the material of described first lens is H-ZLAF75A, the material of described second lens is H-ZBAF3, the material of described 3rd lens is H-ZLAF75A, the material of described 4th lens is H-LAK10, and the material of described 5th lens is H-FK61, and the material of described 6th lens is H-ZF4, the material of described 7th lens is H-LAF10LA, and the material of described 8th lens is H-LAF10LA.
One as 8mm focusing machine visual lens of the present invention is improved, and the rear of described 8th lens is formed with image planes, and the distance d8 between described image planes and described 8th lens is 7.854mm.
One as 8mm focusing machine visual lens of the present invention is improved, spacing d7 between the rear end surface of described 7th lens and the front end curved surface of described 8th lens is adjustable, the adjustable extent of d7 is 1.5mm ~ 4.6mm, and the spacing distance between described first lens, described second lens, described 3rd lens, described 4th lens, described 5th lens, described 6th lens and described 7th lens does not change.Regulate the distance d7 between the rear end surface of the 7th lens and the front end curved surface of described 8th lens when making to take different object distances, image planes obtain image clearly.
One as 8mm focusing machine visual lens of the present invention is improved, and the spacing d7 adjustable extent between the rear end surface of described 7th lens and the front end curved surface of described 8th lens is 1.65mm ~ 4.409mm.
One as 8mm focusing machine visual lens of the present invention is improved, also comprise lens barrel, the first lens, described second lens, described 3rd lens, described 4th lens, described 5th lens, described 6th lens, described 7th lens and described 8th lens are installed in described lens barrel.
Beneficial effect of the present invention is: provide 8mm focusing machine visual lens, and by the combination of 8 lens, the camera lens realizing 8mm focal length is 2/3 at corresponding chip size " time, its pixel value can reach 5 mega pixels, can meet high-end product demand; Its clear aperature is adjustable within the scope of F2.5 ~ F16 simultaneously.Compact conformation, easy to assembly, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the cut-open view of 8mm focusing machine visual lens of the present invention.
Fig. 2 is the structural representation of lens combination of the present invention.
Fig. 3 is the structural drawing of the present invention first lens.
Fig. 4 is the structural drawing of the present invention second lens.
Fig. 5 is the structural drawing of the present invention the 3rd lens.
Fig. 6 is the structural drawing of the present invention the 4th lens.
Fig. 7 is the structural drawing of the present invention the 5th lens.
Fig. 8 is the structural drawing of the present invention the 6th lens.
Fig. 9 is the structural drawing of the present invention the 7th lens.
Figure 10 is the structural drawing of the present invention the 8th lens.
Wherein, 10. the first lens, 20. second lens, 30. the 3rd lens, 40. the 4th lens, 50. the 5th lens, 60. the 6th lens, the 70, seven lens, 80. the 8th lens, 100. lens barrels, 200. diaphragms, 300. image planes.
Embodiment
Below in conjunction with embodiment and Figure of description, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Fig. 1 to 10,8mm focusing machine visual lens of the present invention, comprise lens barrel 100 and 8 lens combination structures, 8 lens are installed in lens barrel 100.
Wherein, the first lens 10 setting gradually the coaxial concaveconvex structure of central shaft along light direction are comprised, second lens 20 of double-concave structure, 3rd lens 30 of concaveconvex structure, 4th lens 40 of biconvex structure, 5th lens 50 of biconvex structure, 6th lens 60 of double-concave structure, before 7th lens 70 of concaveconvex structure and the 8th lens 80, first lens 10 of biconvex structure, the radius of end curved surface is 21.99 ± 0.1mm, the radius of rear end surface is 8.185 ± 0.1mm, thickness b1 is 6.143 ± 0.03mm, and before the second lens 20, the radius of end curved surface is 49.656 ± 0.1mm, the radius of rear end surface is 13.7 ± 0.1mm, thickness b2 is 1.053 ± 0.02mm, and before the 3rd lens 30, the radius of end curved surface is 33.738 ± 0.1mm, the radius of rear end surface is 18.924 ± 0.1mm, thickness b3 is 8.673 ± 0.03mm, and before the 4th lens 40, the radius of end curved surface is 20.732 ± 0.1mm, the radius of rear end surface is 20.732 ± 0.1mm, thickness b4 is 9.966 ± 0.03mm, and before the 5th lens 50, the radius of end curved surface is 19.285 ± 0.1mm, the radius of rear end surface is 6.861 ± 0.1mm, thickness b5 is 2.904 ± 0.03mm, and before the 6th lens 60, the radius of end curved surface is 6.861 ± 0.1mm, the radius of rear end surface is 13.05 ± 0.1mm, thickness b6 is 2.977 ± 0.03mm, and before the 7th lens 70, the radius of end curved surface is 45.45 ± 0.1mm, the radius of rear end surface is 12 ± 0.1mm, thickness b7 is 2.11 ± 0.03mm, and before the 8th lens 80, the radius of end curved surface is 25.965 ± 0.1mm, the radius of rear end surface is 25.965 ± 0.1mm, thickness b8 is 3.205 ± 0.03mm, the spacing d1 of the first lens 10 and the second lens 20 is 2.942mm, the spacing d2 of the second lens 20 and the 3rd lens 30 is 1.713mm, the spacing d3 of the 3rd lens 30 and the 4th lens 40 is 2.416mm, and the spacing d6 of the 6th lens 60 and the 7th lens 70 is 2.618mm, be provided with diaphragm 200 between 4th lens 40 and the 5th lens 50, the spacing d4 of the 4th lens 40 and diaphragm 200 is 5.87mm, and the spacing d5 of diaphragm 200 and the 4th lens 40 is 1.167mm, and wherein, the 5th lens 50 and the 6th lens 60 are glued together by optical glue.
Preferably, diaphragm 200 light hole is adjustable, and the light hole adjustable extent of diaphragm 200 is 0.8mm ~ 5.8mm.
Wherein, the light hole of diaphragm 200 is set to circular hole, and its F value can be adjustable between 2.5 ~ 16, and it is stronger that camera lens leads to light, and brightness is better.Certainly, the hole of diaphragm 200 can also be polygon, but this polygonal limit number at least 5 (can affect brightness uniformity effect when polygon is quadrilateral time, corner there will be partially dark situation.), limit number is more many close to circle, because the logical light effect of circular hole is best.
Wherein, the material of the first lens 10 is H-ZLAF75A, the material of the second lens 20 is H-ZBAF3, the material of the 3rd lens 30 is H-ZLAF75A, the material of the 4th lens 40 is H-LAK10, and the material of the 5th lens 50 is H-FK61, and the material of the 6th lens 60 is H-ZF4, the material of the 7th lens 70 is H-LAF10LA, and the material of the 8th lens 80 is H-LAF10LA.
Preferably, the rear of the 8th lens 80 is formed with image planes 300, and the distance d8 between image planes 300 and the 8th lens 80 is 7.854mm.
Preferably, distance d7 between the rear end surface of the 7th lens 70 and the front end curved surface of the 8th lens 80 is adjustable, the adjustable extent of d7 is 1.65mm ~ 4.409mm, and the spacing distance between the first lens 10, second lens 20, the 3rd lens 30, the 4th lens 40, the 5th lens 50, the 6th lens 60 and the 7th lens 70 does not change.Regulate the distance d7 between the rear end surface of the 7th lens 70 and the front end curved surface of the 8th lens 80 when making to take different object distances, image planes 300 obtain image clearly.Namely, in order to obtain image clearly in image planes 300, when object distance d0 is infinite distance, the value regulating d7 is 1.65mm; When object distance d0 is 4m, the value regulating d7 is 1.719mm; When object distance d0 is 0.22m, the value regulating d7 is 2.946mm; When object distance d0 is 0.1m, the value regulating d7 is 4.409mm.
Preferably, in order to suitably increase the mechanical surplus of adjustment, the adjustable extent of d7 is 1.5mm ~ 4.6mm.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned embodiment and revise.Therefore, the present invention is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present invention, replacement or modification all belong to protection scope of the present invention.In addition, although employ some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (9)
1.8mm focusing machine visual lens, is characterized in that: comprise the first lens setting gradually the coaxial concaveconvex structure of central shaft along light direction, second lens of double-concave structure, 3rd lens of concaveconvex structure, 4th lens of biconvex structure, 5th lens of biconvex structure, 6th lens of double-concave structure, 7th lens of concaveconvex structure and the 8th lens of biconvex structure, the radius of described first lens front curved surface is 21.99 ± 0.1mm, the radius of rear end surface is 8.185 ± 0.1mm, thickness b1 is 6.143 ± 0.03mm, and the radius of described second lens front curved surface is 49.656 ± 0.1mm, the radius of rear end surface is 13.7 ± 0.1mm, thickness b2 is 1.053 ± 0.02mm, and the radius of described 3rd lens front curved surface is 33.738 ± 0.1mm, the radius of rear end surface is 18.924 ± 0.1mm, thickness b3 is 8.673 ± 0.03mm, and the radius of described 4th lens front curved surface is 20.732 ± 0.1mm, the radius of rear end surface is 20.732 ± 0.1mm, thickness b4 is 9.966 ± 0.03mm, and the radius of described 5th lens front curved surface is 19.285 ± 0.1mm, the radius of rear end surface is 6.861 ± 0.1mm, thickness b5 is 2.904 ± 0.03mm, and the radius of described 6th lens front curved surface is 6.861 ± 0.1mm, the radius of rear end surface is 13.05 ± 0.1mm, thickness b6 is 2.977 ± 0.03mm, and the radius of described 7th lens front curved surface is 45.45 ± 0.1mm, the radius of rear end surface is 12 ± 0.1mm, thickness b7 is 2.11 ± 0.03mm, and the radius of described 8th lens front curved surface is 25.965 ± 0.1mm, the radius of rear end surface is 25.965 ± 0.1mm, thickness b8 is 3.205 ± 0.03mm, the spacing d1 of described first lens and described second lens is 2.942mm, the spacing d2 of described second lens and described 3rd lens is 1.713mm, the spacing d3 of described 3rd lens and described 4th lens is 2.416mm, and the spacing d6 of described 6th lens and described 7th lens is 2.618mm.
2. 8mm focusing machine visual lens according to claim 1, it is characterized in that: between described 4th lens and described 5th lens, be provided with diaphragm, the spacing d4 of described 4th lens and described diaphragm is 5.87mm, and the spacing d5 of described diaphragm and described 4th lens is 1.167mm.
3. 8mm focusing machine visual lens according to claim 2, is characterized in that: described diaphragm light hole is adjustable, and the light hole adjustable extent of described diaphragm is 0.8mm ~ 5.8mm.
4. 8mm focusing machine visual lens according to claim 1, is characterized in that: described 5th lens and described 6th lens are glued together by optical glue.
5. 8mm focusing machine visual lens according to claim 1, it is characterized in that: the material of described first lens is H-ZLAF75A, the material of described second lens is H-ZBAF3, the material of described 3rd lens is H-ZLAF75A, the material of described 4th lens is H-LAK10, and the material of described 5th lens is H-FK61, and the material of described 6th lens is H-ZF4, the material of described 7th lens is H-LAF10LA, and the material of described 8th lens is H-LAF10LA.
6. 8mm focusing machine visual lens according to claim 1, is characterized in that: the rear of described 8th lens is formed with image planes, and the distance d8 between described image planes and described 8th lens is 7.854mm.
7. 8mm focusing machine visual lens according to claim 1, it is characterized in that: the spacing d7 between the rear end surface of described 7th lens and the front end curved surface of described 8th lens is adjustable, the adjustable extent of d7 is 1.5mm ~ 4.6mm, and the spacing distance between described first lens, described second lens, described 3rd lens, described 4th lens, described 5th lens, described 6th lens and described 7th lens does not change.
8. 8mm focusing machine visual lens according to claim 7, is characterized in that: the spacing d7 adjustable extent between the rear end surface of described 7th lens and the front end curved surface of described 8th lens is 1.65mm ~ 4.409mm.
9. 8mm focusing machine visual lens according to claim 1, it is characterized in that: also comprise lens barrel, the first lens, described second lens, described 3rd lens, described 4th lens, described 5th lens, described 6th lens, described 7th lens and described 8th lens are installed in described lens barrel.
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| CN201410711287.9A CN104360460B (en) | 2014-12-01 | 2014-12-01 | 8mm focusing machine visual lens |
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| CN201410711287.9A CN104360460B (en) | 2014-12-01 | 2014-12-01 | 8mm focusing machine visual lens |
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| CN104360460B CN104360460B (en) | 2017-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107688228A (en) * | 2017-11-01 | 2018-02-13 | 广东奥普特科技股份有限公司 | 4mm focusing machine visual lens |
| CN107741626A (en) * | 2017-11-01 | 2018-02-27 | 广东奥普特科技股份有限公司 | 75mm focusing machine visual lens |
| CN107957617A (en) * | 2017-12-14 | 2018-04-24 | 广东奥普特科技股份有限公司 | 8mm focusing machine visual lens |
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