CN112180553A - Optical lens system - Google Patents
Optical lens system Download PDFInfo
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- CN112180553A CN112180553A CN202011099666.9A CN202011099666A CN112180553A CN 112180553 A CN112180553 A CN 112180553A CN 202011099666 A CN202011099666 A CN 202011099666A CN 112180553 A CN112180553 A CN 112180553A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 10
- 230000004075 alteration Effects 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000295 complement effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
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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
- G02B13/0015—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
-
- 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
-
- 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
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
Abstract
The invention discloses an optical lens system, which comprises a plurality of lens groups which are sequentially arranged from an object side to an image side, wherein an optical axis is correspondingly formed among the lens groups, and the lens groups comprise a first lens group, a second lens group and a third lens group; the first lens group has negative focal power and is movably arranged along the extending direction of the optical axis; the second lens group has positive focal power and is movably arranged along the extending direction of the optical axis; the third lens group has negative focal power, and the installation position of the third lens group is fixedly arranged; wherein image plane compensation is achieved by changing positions of the first lens group and the second lens group. Through the plurality of lens groups, the refractive index and the Abbe number are complementary, the image resolution effect of the infrared band is ensured under the condition of ensuring small chromatic aberration of the visible band, the conjugate distance change quantity of the first lens group is offset with the conjugate distance change quantity after the second lens group is amplified, and image plane compensation is realized.
Description
Technical Field
The invention relates to the field of optical equipment, in particular to an optical lens system.
Background
The current zoom optical system for monitoring has the following defects: the system has low resolution, small aperture and high cost, and can not ensure complete confocal of infrared of each focal length in the zooming process, and the like. At present, no lens fully considering the characteristics exists in the market, only a few lenses are available, and a certain aspect is improved under the condition of sacrificing other aspects, for example, in order to realize ultrahigh definition and infrared confocal, the aperture is designed to be small, and a plurality of glass spherical lenses and even glass aspheric lenses are used; the requirement of definition of the monitoring lens under the condition of low illumination cannot be met; the cost is also high, and the popularization of the lens is limited.
Disclosure of Invention
The invention mainly aims to provide an optical lens system, and aims to solve the problem of poor imaging effect of a lens optical system.
In order to achieve the above object, the present invention provides an optical lens system, including a plurality of lens groups arranged in order from an object side to an image side, the plurality of lens groups corresponding to each other to form an optical axis, wherein the plurality of lens groups include:
a first lens group having negative focal power and movably disposed along an extending direction of the optical axis;
a second lens group having positive focal power and movably disposed along an extending direction of the optical axis; and the number of the first and second groups,
the third lens group has negative focal power, and the installation position of the third lens group is fixedly arranged;
wherein image plane compensation is achieved by changing positions of the first lens group and the second lens group.
Optionally, the first lens group includes a first lens, a second lens, and a third lens arranged in order from an object side to an image side.
Optionally, the first lens is a glass spherical lens;
the second lens and the third lens are plastic aspheric lenses.
Optionally, the second lens group includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in order from the object side to the image side.
Optionally, the fourth lens, the sixth lens, the eighth lens and the tenth lens are all positive lenses;
the seventh lens and the ninth lens are both negative lenses.
Optionally, the fifth lens, the sixth lens, the eighth lens and the ninth lens are glass spherical lenses;
the fourth lens, the seventh lens and the tenth lens are plastic aspheric lenses.
Optionally, the third lens group includes an eleventh lens and a twelfth lens arranged in order from the object side to the image side;
the eleventh lens and the twelfth lens are plastic aspheric lenses.
Optionally, a stop is disposed between the first lens group and the second lens group.
Optionally, the optical lens system further includes a photosensitive chip, the photosensitive chip is disposed on one side of the third lens group facing the image space, and a photosensitive surface of the photosensitive chip faces the third lens group.
Optionally, an optical filter is disposed between the photosensitive chip and the third lens group.
In the technical scheme of the invention, the refractive index and the abbe number of light rays from the object side to the image side are complementary through the plurality of lens groups, the image resolution effect of an infrared band is ensured under the condition of ensuring small chromatic aberration of a visible band, and the conjugate distance change quantity of the first lens group is offset with the conjugate distance change quantity after the second lens group is amplified by adjusting the positions of the first lens group and the second lens group, so that the image plane compensation is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an optical system provided by the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
24 | Seventh lens element |
| 1 | |
25 | |
| 11 | |
26 | |
| 12 | |
27 | |
| 13 | |
3 | |
| 2 | |
31 | |
| 21 | |
32 | |
| 22 | Fifth lens element | 4 | |
| 23 | Sixth lens element | 5 | Optical filter |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The current zoom optical system for monitoring has the following defects: the system has low resolution, small aperture and high cost, and can not ensure complete confocal of infrared of each focal length in the zooming process, and the like. At present, no lens fully considering the characteristics exists in the market, only a few lenses are available, and a certain aspect is improved under the condition of sacrificing other aspects, for example, in order to realize ultrahigh definition and infrared confocal, the aperture is designed to be small, and a plurality of glass spherical lenses and even glass aspheric lenses are used; the requirement of definition of the monitoring lens under the condition of low illumination cannot be met; the cost is also high, and the popularization of the lens is limited.
The invention provides an optical lens system, aiming at solving the problem of poor imaging effect of the optical lens system.
Referring to fig. 1, the present invention provides an optical lens system 100, wherein the optical lens system 100 includes a plurality of lens groups sequentially arranged from an object side to an image side, and an optical axis is correspondingly formed between the plurality of lens groups, wherein the plurality of lens groups includes a first lens group 1, a second lens group 2, and a third lens group 3; the first lens group 1 has negative focal power and is movably arranged along the extending direction of the optical axis; the second lens group 2 has positive focal power and is movably arranged along the extending direction of the optical axis; the third lens group 3 has negative focal power, and the installation position of the third lens group 3 is fixedly arranged; wherein image plane compensation is achieved by changing the positions of the first lens group 1 and the second lens group 2.
In the technical scheme of the invention, the refractive index and the abbe number of light rays from the object side to the image side are complementary through a plurality of lens groups, the image resolution effect of an infrared band is ensured under the condition of ensuring small chromatic aberration of a visible band, and the change amount of the conjugate distance of the first lens group 1 is offset with the change amount of the conjugate distance of the second lens group 2 after amplification by adjusting the positions of the first lens group 1 and the second lens group 2, so that the image plane compensation is realized.
In the present embodiment, the first lens group 1 includes a first lens 11, a second lens 12, and a third lens 13 arranged in this order from the object side to the image side. Through the combination of the three lenses, namely the first lens 11, the second lens 12 and the third lens 13, the first lens group 1 can correct the deviation of light in transmission conveniently.
Specifically, in this embodiment, the first lens 11 is a spherical glass lens; the second lens 12 and the third lens 13 are plastic aspheric lenses. Through the cooperation of glass spherical lens and plastics aspheric surface lens, the colour difference of correction camera lens that not only can be fine guarantees infrared confocal, can also correct the spherical aberration and the sine difference of high power position.
On the other hand, the second lens group 2 includes a fourth lens 21, a fifth lens 22, a sixth lens 23, a seventh lens 24, an eighth lens 25, a ninth lens 26, and a tenth lens 27, which are arranged in order from the object side to the image side. Through mutual collocation of a plurality of lenses, be convenient for realize the correction of second battery of lenses 2.
Specifically, the fourth lens 21, the sixth lens 23, the eighth lens 25, and the tenth lens 27 are all positive lenses; the seventh lens 24 and the ninth lens 26 are both negative lenses. Therefore, the second lens group 2 realizes a positive and negative staggered structure, thereby not only eliminating chromatic aberration of the whole system, but also well balancing the chromatic aberration of the whole system and realizing correction of chromatic aberration.
The fifth lens 22 may be a positive lens or a negative lens.
Similarly, the fifth lens 22, the sixth lens 23, the eighth lens 25 and the ninth lens 26 are spherical glass lenses; the fourth lens 21, the seventh lens 24, and the tenth lens 27 are plastic aspherical lenses. Realizes the correction of higher-order aberration and ensures the correction of chromatic aberration
In addition, the third lens group 3 includes an eleventh lens 31 and a twelfth lens 32 arranged in order from the object side to the image side; the eleventh lens 31 and the twelfth lens 32 are plastic aspheric lenses. The chromatic aberration and each aberration are corrected.
Further, a diaphragm is arranged between the first lens group 1 and the second lens group 2. The zoom lens is beneficial to blocking part of light rays in the zooming process and improving the imaging quality.
The distance between the first lens group 1 and the diaphragm is 9.67-0.867 mm; the interval between the diaphragm and the second lens group 2 is 7.93-0.07 mm.
In addition, the optical lens system 100 further includes a photosensitive chip 4, the photosensitive chip 4 is disposed on one side of the third lens group 3 facing the image space, and a photosensitive surface of the photosensitive chip 4 faces the third lens group 3. Thereby receiving an object image at the image side.
Furthermore, an optical filter 5 is disposed between the photosensitive chip 4 and the third lens group 3. Thereby adjusting the chroma of the object image when finally imaged.
This embodiment provides an embodiment, please refer to the following table:
aspherical surface coefficients of the respective surfaces:
| k | a2 | a3 | a4 | a5 | |
| S3 | -12.356 | 3.26e-007 | -2.18e-005 | 3.927e-007 | -1.68e-009 |
| S4 | 0.9625 | 0.000178 | -1.78e-005 | -1.37e-007 | 6.087e-009 |
| S5 | -6.852 | -0.000122 | 3.854e-006 | -9.708e-008 | -3.444e-009 |
| S6 | 265.35 | -0.000246 | -3.788e-006 | 1.9552e-007 | 2.323e-009 |
| S7 | -3.854 | 0.000245 | -6.834e-006 | -3.39e-010 | -1.4788e-009 |
| S8 | 18.657 | 3.23e-005 | -4.283e-007 | -5.088e-008 | -9.323e-010 |
| S13 | -38.246 | -0.000152 | 1.048e-005 | 5.3862e-008 | -2.630e-009 |
| S14 | -2.264 | 0.000653 | -1.5562e-006 | 2.271e-007 | 8.997e-009 |
| S18 | -20.356 | 0.0005292 | 1.027e-005 | -6.172e-007 | 1.5563e-008 |
| S19 | -38.325 | 0.0005255 | 2.4933e-005 | -5.8815e-007 | 2.585e-010 |
| S20 | -106.254 | -0.000264 | 2.131e-005 | 3.138e-007 | -3.67e-008 |
| S21 | -1.6587 | -0.000513 | 3.455e-005 | 3.293e-006 | 4.998e-008 |
| S22 | 0.3652 | -0.000109 | -1.091e-005 | 2.0115e-006 | 2.405e-007 |
| S23 | 95.375 | -2.241e-005 | -2.6105e-005 | 3.717e-006 | -2.487e-007 |
wherein the formula
C in (3) corresponds to the reciprocal of the radius R: 1/R
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An optical lens system, comprising a plurality of lens groups arranged in order from an object side to an image side, the plurality of lens groups corresponding to each other to form an optical axis, wherein the plurality of lens groups comprises:
a first lens group having negative focal power and movably disposed along an extending direction of the optical axis;
a second lens group having positive focal power and movably disposed along an extending direction of the optical axis; and the number of the first and second groups,
the third lens group has negative focal power, and the installation position of the third lens group is fixedly arranged;
wherein image plane compensation is achieved by changing positions of the first lens group and the second lens group.
2. The optical lens system according to claim 1, wherein the first lens group includes a first lens, a second lens, and a third lens arranged in this order from an object side to an image side.
3. The optical lens system of claim 2 wherein the first lens is a glass sphere lens;
the second lens and the third lens are plastic aspheric lenses.
4. The optical lens system according to claim 1, wherein the second lens group includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in order from an object side to an image side.
5. The optical lens system of claim 4 wherein the fourth lens, the sixth lens, the eighth lens, and the tenth lens are all positive lenses;
the seventh lens and the ninth lens are both negative lenses.
6. The optical lens system of claim 4 wherein the fifth lens, the sixth lens, the eighth lens and the ninth lens are spherical glass lenses;
the fourth lens, the seventh lens and the tenth lens are plastic aspheric lenses.
7. The optical lens system according to claim 1, wherein the third lens group includes an eleventh lens and a twelfth lens arranged in order from an object side to an image side;
the eleventh lens and the twelfth lens are plastic aspheric lenses.
8. The optical lens system of claim 1 wherein a stop is disposed between the first lens group and the second lens group.
9. The optical lens system as claimed in claim 1, further comprising a photosensitive chip, wherein the photosensitive chip is disposed on a side of the third lens group facing the image side, and a photosensitive surface of the photosensitive chip is disposed facing the third lens group.
10. The optical lens system of claim 9, wherein a filter is disposed between the light sensing chip and the third lens group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011099666.9A CN112180553A (en) | 2020-10-14 | 2020-10-14 | Optical lens system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011099666.9A CN112180553A (en) | 2020-10-14 | 2020-10-14 | Optical lens system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112180553A true CN112180553A (en) | 2021-01-05 |
Family
ID=73950156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011099666.9A Pending CN112180553A (en) | 2020-10-14 | 2020-10-14 | Optical lens system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112180553A (en) |
-
2020
- 2020-10-14 CN CN202011099666.9A patent/CN112180553A/en active Pending
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