CN107015351A - High pixel, low cost, the varifocal optical system of big visual field - Google Patents
High pixel, low cost, the varifocal optical system of big visual field Download PDFInfo
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- CN107015351A CN107015351A CN201710403852.9A CN201710403852A CN107015351A CN 107015351 A CN107015351 A CN 107015351A CN 201710403852 A CN201710403852 A CN 201710403852A CN 107015351 A CN107015351 A CN 107015351A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 27
- 230000000007 visual effect Effects 0.000 title claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 5
- 238000009738 saturating Methods 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
-
- 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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lenses (AREA)
Abstract
The invention discloses high pixel, low cost, the varifocal optical system of big visual field, it is disposed with from object plane to image planes：First lens group static with respect to image planes, the focal power of the first lens group is just, the first lens group includes first lens and the second lens；The second lens group that the relative image planes of energy are moved forward and backward, the focal power of the second lens group is negative, and the second lens group includes the 3rd lens, the 4th lens, the 5th lens；Diaphragm；The 3rd lens group that the relative image planes of energy are moved forward and backward, the focal power of the 3rd lens group is just, the 3rd lens group includes the 6th lens, the 7th lens, the 8th lens and the 9th lens；Optical filter.Present invention employs the structure of three lens groups, the first lens group is moved with respect to imaging surface transfixion, the second lens group, the 3rd lens group with respect to imaging surface；This structure reduces the complexity of structure on the basis of optical property is met, so as to reduce the accumulated tolerance between poly-lens group, improves production yield.
Description
【Technical field】
The present invention relates to camera lens, especially high pixel, low cost, the varifocal optical system of big visual field.
【Background technology】
Shortcoming as the variable focal length optical system generally existing of current video conference：System cost is high, resolution ratio is low,
The angle of visual field is small, complicated, in zooming procedure it cannot be guaranteed that each focal length high/low temperature is confocal etc..Do not have also in the market
Camera lens can overcome disadvantages mentioned above completely.Only a small number of camera lenses, in terms of some is improved in the case of sacrificing other side, such as
In order to realize high pixel, big visual field, system bulk and cost must be increased, far can not meet video conference requirement cost it is low,
The high reality of pixel.
Therefore, the present invention is based on the deficiency of the above and produced.
【The content of the invention】
, should the technical problem to be solved in the present invention is to provide a kind of high pixel, low cost, the varifocal optical system of big visual field
System pixel is high, cost is low, the angle of visual field is big, simple in construction.
In order to solve the above technical problems, present invention employs following technical proposals：High pixel, low cost, the change of big visual field
Focus optical system, it is characterised in that be disposed with from object plane to image planes：
First lens group static with respect to image planes, the focal power of first lens group is just the first described lens group
Including the first lens and the second lens；
Can the second lens group for moving forward and backward of relative image planes, the focal power of second lens group be it is negative, described second
Lens group includes the 3rd lens, the 4th lens, the 5th lens；
Diaphragm；
The 3rd lens group that the relative image planes of energy are moved forward and backward, the focal power of the 3rd lens group is just, the described 3rd is saturating
Microscope group includes the 6th lens, the 7th lens, the 8th lens and the 9th lens；
Optical filter.
High pixel, low cost, the varifocal optical system of big visual field as described above, it is characterised in that：First lens
Bonded with second lens by optical glue, the 7th lens are bonded with the 8th lens by optical glue.
High pixel, low cost, the varifocal optical system of big visual field as described above, it is characterised in that：4th lens
Using plastic aspherical element eyeglass；9th lens use Glass aspheric eyeglass；First lens, the second lens, the 3rd
Lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens use glass spheric glass.
Compared with prior art, high pixel of the invention, low cost, the varifocal optical system of big visual field, have reached as follows
Effect：
1st, the structure that the video conference camera lens of larger multiplying power is used in the market is the structure of four lens groups, first
Lens group, the 3rd lens group are actionless with respect to imaging surface, and the second lens group, the 4th lens group are with respect to imaging surface
Motion.Present invention employs the structure of three lens groups, the first lens group is actionless, the second lens with respect to imaging surface
Group, the 3rd lens group are motions with respect to imaging surface；This structure reduces the complexity of structure on the basis of optical property is met
Property, so as to reduce the accumulated tolerance between poly-lens group, improve production yield；Meanwhile, this structure is whole from low power to high power
During individual, diaphragm caliber size is constant, also reduces the complexity of structure.
2nd, in the market most of zoom lens in order to realize that high pixel employs more glass lens and glass
Aspherical lens；The present invention instead of the larger Glass aspheric eyeglass of bore using plastic aspherical element, significantly reduce cost
With the weight of second horde.
3rd, the pixel of the zoom lens of most of big visual field is relatively low in the market, is usually expressed as center resolution
Height, periphery is low, and during zoom, in order to lift the solution picture of middle multiplying power, diaphragm bore is diminishing；The present invention
Resolution ratio it is very high, from center to periphery, it is clear, high that the whole process from low power to high power can photograph whole picture
The image of contrast.
4th, major part uses the zoom system, pancreatic system of plastic aspherical element, under normal temperature focusing situation, high/low temperature meeting in the market
The situation for empty Jiao occur, getting confused；This invention ensures that each multiplying power section high/low temperature is complete confocal.
5th, the distortion in the market under zoom lens's low power state of wide-angle is very big, under low power state of the present invention
Distortion it is very small, in shooting process, being hardly visible object has deformation.
【Brief description of the drawings】
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is schematic diagram of the invention；
Brief description of the drawings：1st, the first lens；2nd, the second lens；3rd, the 3rd lens；4th, the 4th lens；5th, the 5th lens；6th, light
Door screen；7th, the 6th lens；8th, the 7th lens；9th, the 8th lens；10th, the 9th lens；11st, optical filter；12nd, image planes.
【Embodiment】
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.
As shown in figure 1, high pixel, low cost, the varifocal optical system of big visual field, are disposed with from object plane to image planes：
First lens group static with respect to image planes 12, the focal power of first lens group is just the first described lens
Group includes the first lens 1 and the second lens 2；
Can the second lens group for moving forward and backward of relative image planes 12, the focal power of second lens group be it is negative, described the
Two lens groups include the 3rd lens 3, the 4th lens 4, the 5th lens 5；
Diaphragm 6；
The 3rd lens group that the relative image planes 12 of energy are moved forward and backward, the focal power of the 3rd lens group is the just the described 3rd
Lens group includes the 6th lens 7, the 7th lens 8, the 8th lens 9 and the 9th lens 10；
Optical filter 11.
As shown in figure 1, in the present embodiment, first lens 1 are bonded with second lens 2 by optical glue,
7th lens 8 are bonded with the 8th lens 9 by optical glue.
As shown in figure 1, in the present embodiment, the 4th lens 4 use plastic aspherical element eyeglass；9th lens 10
Using Glass aspheric eyeglass；First lens 1, the second lens 2, the 3rd lens 3, the 5th lens 5, the 6th lens the 7, the 7th
Lens 8, the 8th lens 9 use glass spheric glass.
Realize simple in construction, zoom ratio is big, is fixed during present invention design using the first lens group, the second lens group with
3rd lens group is moved along image direction, and larger space is left between the first lens group and diaphragm, make the second lens group from
Low power state is larger to high power state amount of movement.So, it is achieved that and has just reached market using only the structure of three lens groups
On need to use the zoom system, pancreatic system of big multiplying power that four lens groups can be only achieved.Meanwhile, the focal length of the first lens group is just second
The focal length of lens group is negative, it is ensured that either wide-angle or bigbore light are incident, can enter following lenses group, real
Existing larger zoom ratio.
The present invention realizes high-resolution, the big angle of visual field, is moved using the second lens group, the 3rd lens group, the first lens group
Fixed, the conjugate distance knots modification of such second lens group is offseted with the knots modification of conjugate distance caused by the 4th lens group, is realized
Image planes are compensated.Meanwhile, the focal length of the first lens group is just, the focal length of the second lens group is negative, it is ensured that either wide-angle is still
Bigbore light is incident, can enter following lenses group.First lens group uses balsaming lens, and cemented surface bends towards diaphragm,
The spherical aberration and sine that high power position can be corrected are poor；Second lens group has corrected low power position well using three simple lenses
Aberration.3rd lens group using two simple lenses and a balsaming lens and removable, during correction different multiplying before lens group
Residual aberration.Whole system many places are used cooperatively using simple lens and balsaming lens, not only eliminate the aberration of whole system,
Also the aberration of whole system is balanced well.Finally, certain vignetting is set, in the case where not influenceing illuminance of image plane, also
Periphery spurious rays can be blocked, while making image plane center high resolution, also there is very high resolution ratio at edge.
The present invention realizes that system cost reduction and high/low temperature are confocal, and each plastic material and glass have been taken into full account in design process
Glass Refractive Index of Material, the change of Abbe number high/low temperature match the change of face type simultaneously, realize the matching of each key element of high/low temperature, from
And the fixation of image planes and clear when realizing high/low temperature, will wherein bigbore aspherical use plastic material, greatly reduce into
Sheet and weight.Meanwhile, using the structure of three lens groups, cost is not only reduced, and reduce the accumulation between lens group
Tolerance, improves the yield in production process, fundamentally reduces cost.
The present invention uses wide spectrum, and the theoretical resolving power of design is far above theoretical desired value, ensure that image sharpness
And color reducibility.
The actual design case of the zoom is set forth below：
The asphericity coefficient in each face：
| k | a2 | a3 | a4 | a5 | a6 | |
| S6 | -91.61 | 2.46E-004 | -2.61E-006 | 8.59E-009 | 4.35E-011 | -4.13E-013 |
| S7 | 0.017 | 4.18E-004 | -5.95E-006 | 1.89E-008 | -1.45E-010 | 3.34E-012 |
| S17 | 6.062 | 1.61E-003 | -1.95E-004 | 9.38E-006 | -3.13E-007 | 1.43E-008 |
| S18 | -49.340 | 4.24E-003 | -3.06E-004 | 1.41E-005 | 8.13E-007 | -1.69E-007 |
Wherein equation：
In c respective radius R inverse be：1/R.
Zoom moving range between lens group：
First lens group between the second lens group at intervals of 2.79mm to 40.11mm；
Second lens group between diaphragm at intervals of 37.85mm to 0.53mm；
Diaphragm between the 3rd lens group at intervals of 7.82mm to 1.4mm.
Claims (3)
1. high pixel, low cost, the varifocal optical system of big visual field, it is characterised in that be disposed with from object plane to image planes：
First lens group static with respect to image planes (12), the focal power of first lens group is just the first described lens group
Including the first lens (1) and the second lens (2)；
Can the second lens group for moving forward and backward of relative image planes (12), the focal power of second lens group be it is negative, described second
Lens group includes the 3rd lens (3), the 4th lens (4), the 5th lens (5)；
Diaphragm (6)；
The 3rd lens group that the relative image planes (12) of energy are moved forward and backward, the focal power of the 3rd lens group is just, the described 3rd is saturating
Microscope group includes the 6th lens (7), the 7th lens (8), the 8th lens (9) and the 9th lens (10)；
Optical filter (11).
2. high pixel according to claim 1, low cost, the varifocal optical system of big visual field, it is characterised in that：Described
One lens (1) are bonded with second lens (2) by optical glue, and the 7th lens (8) are led to the 8th lens (9)
Cross optical glue bonding.
3. high pixel according to claim 2, low cost, the varifocal optical system of big visual field, it is characterised in that：Described
Four lens (4) use plastic aspherical element eyeglass；9th lens (10) use Glass aspheric eyeglass；First lens
(1), the second lens (2), the 3rd lens (3), the 5th lens (5), the 6th lens (7), the 7th lens (8), the 8th lens (9) are adopted
Use glass spheric glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403852.9A CN107015351A (en) | 2017-06-01 | 2017-06-01 | High pixel, low cost, the varifocal optical system of big visual field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403852.9A CN107015351A (en) | 2017-06-01 | 2017-06-01 | High pixel, low cost, the varifocal optical system of big visual field |
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| Publication Number | Publication Date |
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| CN107015351A true CN107015351A (en) | 2017-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710403852.9A Pending CN107015351A (en) | 2017-06-01 | 2017-06-01 | High pixel, low cost, the varifocal optical system of big visual field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014953B (en) * | 2020-10-13 | 2021-01-01 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| CN114063267A (en) * | 2020-07-31 | 2022-02-18 | 大立光电股份有限公司 | Image lens assembly, zoom image capturing device and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100321790A1 (en) * | 2008-04-28 | 2010-12-23 | Canon Kabushiki Kaisha | Zoom lens and camera with the same |
| JP2015191064A (en) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | Variable power optical system, imaging apparatus, and method for manufacturing the variable power optical system |
| CN206863325U (en) * | 2017-06-01 | 2018-01-09 | 中山联合光电科技股份有限公司 | High pixel, low cost, the Varifocus optical apparatus of big visual field |
-
2017
- 2017-06-01 CN CN201710403852.9A patent/CN107015351A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100321790A1 (en) * | 2008-04-28 | 2010-12-23 | Canon Kabushiki Kaisha | Zoom lens and camera with the same |
| JP2015191064A (en) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | Variable power optical system, imaging apparatus, and method for manufacturing the variable power optical system |
| CN206863325U (en) * | 2017-06-01 | 2018-01-09 | 中山联合光电科技股份有限公司 | High pixel, low cost, the Varifocus optical apparatus of big visual field |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114063267A (en) * | 2020-07-31 | 2022-02-18 | 大立光电股份有限公司 | Image lens assembly, zoom image capturing device and electronic device |
| CN112014953B (en) * | 2020-10-13 | 2021-01-01 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
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Application publication date: 20170804 |
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