CN112630936A - Imaging lens for unmanned aerial vehicle detection - Google Patents
Imaging lens for unmanned aerial vehicle detection Download PDFInfo
- Publication number
- CN112630936A CN112630936A CN202011575988.6A CN202011575988A CN112630936A CN 112630936 A CN112630936 A CN 112630936A CN 202011575988 A CN202011575988 A CN 202011575988A CN 112630936 A CN112630936 A CN 112630936A
- Authority
- CN
- China
- Prior art keywords
- lens
- image
- refractive index
- lens element
- imaging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 81
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 238000012634 optical imaging Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract description 19
- 235000005811 Viola adunca Nutrition 0.000 abstract description 9
- 240000009038 Viola odorata Species 0.000 abstract description 9
- 235000013487 Viola odorata Nutrition 0.000 abstract description 9
- 235000002254 Viola papilionacea Nutrition 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 25
- 230000005540 biological transmission Effects 0.000 description 11
- 238000005286 illumination Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000011161 development Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 239000006059 cover glass Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- 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
Abstract
The invention discloses an imaging lens for unmanned aerial vehicle detection, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis; the first lens element to the twelfth lens element each include an object side surface and an image side surface; the first lens has negative refractive index; the second lens has positive refractive index; the third lens element has negative refractive index; the fourth lens element has negative refractive index; the fifth lens element has positive refractive index; the sixth lens element has positive refractive index; the seventh lens element has positive refractive index; the eighth lens element has a negative refractive index; the ninth lens element has a negative refractive index; the tenth lens element has a positive refractive index; the eleventh lens element has a negative refractive index; the twelfth lens element has a positive refractive index; the optical imaging lens has only twelve lenses with refractive indexes. The invention adopts twelve lenses along the direction from the object side to the image side, and optimizes chromatic aberration well and avoids blue-violet edge phenomenon by correspondingly designing each lens.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to an imaging lens for unmanned aerial vehicle detection.
Background
With the development of image wireless transmission technology, a camera lens is carried on an unmanned aerial vehicle (especially a professional unmanned aerial vehicle), so that the unmanned aerial vehicle plays an important role in occasions such as aerial photography, spying, monitoring, communication, anti-diving, electronic interference and the like, and becomes an important tool in industries such as civil use, military use and the like. However, the existing lens carried on the unmanned aerial vehicle at least has the following defects:
1. blue-violet edge phenomenon can appear in the imaging lens of current unmanned aerial vehicle professional level.
2. The existing imaging lens of the unmanned aerial vehicle at the professional level is long in structure and heavy in weight.
3. The imaging lens of current unmanned aerial vehicle professional level generally all has the ghost under the strong light source environment, influences the imaging effect.
4. The imaging lens of current unmanned aerial vehicle professional level, the camera lens temperature drift volume is big, when the temperature disturbance is too big, influences the imaging quality.
Disclosure of Invention
The invention aims to provide an imaging lens for unmanned aerial vehicle detection, so as to at least solve one of the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
an imaging lens for unmanned aerial vehicle detection comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a sixth lens, a seventh lens; the first lens element to the twelfth lens element each include an object-side surface facing the object side and allowing the imaging light to pass therethrough and an image-side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the second lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element with positive refractive index has a planar object-side surface and a convex image-side surface;
the eighth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the ninth lens element with a negative refractive index has a convex object-side surface and a concave image-side surface;
the tenth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface;
the eleventh lens element with a negative refractive index has a concave object-side surface and a convex image-side surface;
the twelfth lens element has a positive refractive index, and an object-side surface and an image-side surface of the twelfth lens element are convex;
the optical imaging lens has only twelve lenses with refractive indexes.
Preferably, focal lengths of the first to ninth lenses satisfy the following condition:
-27＜f1＜-26， 15＜f2＜17， -13＜f3＜-12， -24＜f4＜-22，
12＜f5＜14， 16＜f6＜18， 17＜f7＜19， -13＜f8＜-11，
-48＜f9＜-37， 14＜f10＜16， -13＜f11＜-11， 25＜f12＜27，
wherein f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11 and f12 are focal length values of the first lens to the twelfth lens respectively.
Preferably, absolute values of ratios of focal lengths of the first to twelfth lenses to a lens focal length satisfy the following conditions, respectively:
1.85＜|f1/f|＜1.95， 1.15＜|f2/f|＜1.25，
0.85＜|f3/f|＜0.95， 1.6＜|f4/f|＜1.75，
0.9＜|f5/f|＜1.0， 1.25＜|f6/f|＜1.35，
1.25＜|f7/f|＜1.35， 0.85＜|f8/f|＜0.95，
2.6＜|f9/f|＜3.5， 1.0＜|f10/f|＜1.2，
0.8＜|f11/f|＜1.0， 1.85＜|f12/f|＜1.95。
preferably, an image-side surface of the second lens and an object-side surface of the third lens are cemented with each other, an image-side surface of the fourth lens and an object-side surface of the fifth lens are cemented with each other, an image-side surface of the seventh lens and an object-side surface of the eighth lens are cemented with each other, and an image-side surface of the tenth lens and an object-side surface of the eleventh lens are cemented with each other.
Preferably, in the cemented lens formed between the second lens and the third lens, between the fourth lens and the fifth lens, between the seventh lens and the eighth lens, and between the tenth lens and the eleventh lens, the abbe numbers of the two lenses are different by 30 or more.
Preferably, the sixth lens and the twelfth lens are both glass aspheric lenses, and the rest lenses are all glass spherical lenses.
Preferably, the third lens, the fifth lens, the sixth lens and the tenth lens are made of abnormal materials with negative temperature coefficient of refractive index dn/dt.
Preferably, the R value of the image side surface of each of the eighth lens and the ninth lens is larger than 22 mm.
Preferably, the lens barrel further satisfies: TTL is less than 60.0mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.
Preferably, the lens further comprises a diaphragm, and the diaphragm is located between the third lens and the fourth lens.
After adopting the technical scheme, compared with the background technology, the invention has the following advantages:
1. the invention adopts twelve lenses along the direction from the object side to the image side, and optimizes chromatic aberration well and avoids blue-violet edge phenomenon by correspondingly designing each lens.
2. The CRA of the invention is 6 degrees, is matched with the sensor, and has good color rendition and uniform illumination.
3. By controlling the R value of the lens, the invention well weakens the energy of ghost images under the environment of strong light source and ensures the imaging effect of the lens.
4. The invention has small temperature drift, can well keep the working state under various temperature environments and ensures the imaging quality of the lens.
5. The total optical length is 59.6mm, the weight is about 70g, the weight is light, the structure is compact, and the practicability is strong.
Drawings
FIG. 1 is a light path diagram according to the first embodiment;
FIG. 2 is a graph of MTF under visible light for a lens according to a first embodiment;
FIG. 3 is a defocus graph of the lens in the first embodiment under visible light;
FIG. 4 is a lateral aberration diagram of a lens under visible light according to a first embodiment;
FIG. 5 is a graph of field curvature and distortion under visible light for a lens according to an embodiment;
FIG. 6 is a dot-sequence diagram according to the first embodiment;
FIG. 7 is a light path diagram of the second embodiment;
FIG. 8 is a graph of MTF under visible light for a lens of example two;
FIG. 9 is a defocus graph of the lens in the second embodiment under visible light;
FIG. 10 is a lateral aberration diagram of the lens of the second embodiment under visible light;
FIG. 11 is a graph of curvature of field and distortion under visible light for a lens according to a second embodiment;
FIG. 12 is a dot diagram of the second embodiment;
FIG. 13 is a light path diagram of the third embodiment;
fig. 14 is a graph of MTF under visible light for a lens in the third embodiment;
FIG. 15 is a defocus graph of the lens in the third embodiment under visible light;
FIG. 16 is a lateral aberration diagram of a lens of the third embodiment under visible light;
FIG. 17 is a graph of field curvature and distortion under visible light for a lens barrel according to the third embodiment;
FIG. 18 is a dot diagram of the third embodiment;
FIG. 19 is a light path diagram of the fourth embodiment;
fig. 20 is a graph of MTF in visible light for the lens in the fourth embodiment;
FIG. 21 is a defocus graph of the lens in the fourth embodiment in visible light;
FIG. 22 is a lateral aberration diagram of a lens assembly of the fourth embodiment in visible light;
FIG. 23 is a graph of field curvature and distortion under visible light for a lens barrel according to a fourth embodiment;
FIG. 24 is a dot diagram according to the fourth embodiment;
FIG. 25 is a light path diagram of the fifth embodiment;
FIG. 26 is a graph of the MTF under visible light for the lens of example V;
FIG. 27 is a defocus graph of the fifth embodiment lens under visible light;
FIG. 28 is a lateral aberration diagram of a fifth embodiment of the lens under visible light;
FIG. 29 is a graph of field curvature and distortion under visible light for a lens barrel of the fifth embodiment;
FIG. 30 is a dot-sequence diagram of the fifth embodiment.
Description of reference numerals:
the lens system comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, an aperture stop 13 and a protective glass 14.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
In the present specification, the term "a lens element having a positive refractive index (or a negative refractive index)" means that the paraxial refractive index of the lens element calculated by the gauss theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.
The invention discloses an imaging lens for unmanned aerial vehicle detection, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side along an optical axis; the first lens element to the twelfth lens element each include an object-side surface facing the object side and allowing the imaging light to pass therethrough and an image-side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the second lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element with positive refractive index has a planar object-side surface and a convex image-side surface;
the eighth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the ninth lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface;
the eleventh lens element with negative refractive index has a concave object-side surface and a convex image-side surface;
the twelfth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface;
the optical imaging lens has only twelve lenses with refractive indexes.
Preferably, the focal lengths of the first to ninth lenses satisfy the following condition:
-27＜f1＜-26， 15＜f2＜17， -13＜f3＜-12， -24＜f4＜-22，
12＜f5＜14， 16＜f6＜18， 17＜f7＜19， -13＜f8＜-11，
-48＜f9＜-37， 14＜f10＜16， -13＜f11＜-11， 25＜f12＜27，
wherein f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11 and f12 are focal length values of the first lens to the twelfth lens respectively.
Preferably, absolute values of ratios of focal lengths of the first to twelfth lenses to a focal length of the lens respectively satisfy the following conditions:
1.85＜|f1/f|＜1.95， 1.15＜|f2/f|＜1.25，
0.85＜|f3/f|＜0.95， 1.6＜|f4/f|＜1.75，
0.9＜|f5/f|＜1.0， 1.25＜|f6/f|＜1.35，
1.25＜|f7/f|＜1.35， 0.85＜|f8/f|＜0.95，
2.6＜|f9/f|＜3.5， 1.0＜|f10/f|＜1.2，
0.8＜|f11/f|＜1.0， 1.85＜|f12/f|＜1.95。
preferably, the image-side surface of the second lens and the object-side surface of the third lens are cemented with each other, the image-side surface of the fourth lens and the object-side surface of the fifth lens are cemented with each other, the image-side surface of the seventh lens and the object-side surface of the eighth lens are cemented with each other, and the image-side surface of the tenth lens and the object-side surface of the eleventh lens are cemented with each other.
Preferably, in the cemented lens formed between the second lens and the third lens, between the fourth lens and the fifth lens, between the seventh lens and the eighth lens, and between the tenth lens and the eleventh lens, the difference between the dispersion coefficients of the two lenses is more than 30, which can well correct chromatic aberration and avoid the blue-violet edge phenomenon easily occurring in lens imaging.
Preferably, the sixth lens and the twelfth lens are both glass aspheric lenses, and the rest lenses are all glass spherical lenses.
Preferably, the third lens, the fifth lens, the sixth lens and the tenth lens are made of abnormal materials with negative refractive index temperature coefficients dn/dt, when the external temperature changes, the distances between the outer diameters of the lenses and the surfaces of the lens clamping rings and the contact surface of the lens barrel change relatively, the influence of the relative change on the back focus of the lens can be well counteracted by adopting the materials, the lens can keep temperature drift compensation with the Holder, the clear picture can be ensured without defocusing when the lens is used in a temperature range of 0-70 ℃, and most of requirements of use environments can be met.
Preferably, R values of image side surfaces of the eighth lens and the ninth lens are both larger than 22mm, so that energy of ghost images in an environment with a strong light source can be well weakened, and an imaging effect in the environment with the strong light source is better.
Preferably, the lens barrel further satisfies: TTL is less than 60.0mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.
Preferably, the lens further comprises a diaphragm, and the diaphragm is located between the third lens and the fourth lens.
The imaging lens of the present invention will be described in detail below with specific embodiments.
Example one
Referring to fig. 1, the present embodiment discloses an imaging lens for unmanned aerial vehicle detection, which includes, in order from an object side to an image side along an optical axis, a first lens element to a twelfth lens element; the first lens element to the twelfth lens element each include an object-side surface facing the object side and allowing the imaging light to pass therethrough and an image-side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens element 1 has a negative refractive index, and the object-side surface and the image-side surface of the first lens element 1 are convex and concave;
the second lens element 2 has positive refractive index, and the object-side surface and the image-side surface of the second lens element 2 are convex and concave;
the third lens element 3 has a negative refractive index, and the object-side surface and the image-side surface of the third lens element 3 are concave;
the fourth lens element 4 has a negative refractive index, and the fourth lens element 4 has a concave object-side surface and a concave image-side surface;
the fifth lens element 5 has a positive refractive index, and the fifth lens element 5 has a convex object-side surface and a convex image-side surface;
the sixth lens element 6 has a positive refractive index, and the sixth lens element 6 has a convex object-side surface and a convex image-side surface;
the seventh lens element 7 has a positive refractive index, and the seventh lens element 7 has a planar object-side surface and a convex image-side surface;
the eighth lens element 8 has a negative refractive index, and the eighth lens element 8 has a concave object-side surface and a concave image-side surface;
the ninth lens element 9 with negative refractive index has a convex object-side surface and a concave image-side surface, and the ninth lens element 9 has a convex surface and a concave surface;
the tenth lens element 10 with positive refractive power has a convex object-side surface and a convex image-side surface, and the tenth lens element 10 is disposed on the object-side surface;
the eleventh lens element 11 has a negative refractive index, and the eleventh lens element 11 has a concave object-side surface and a convex image-side surface;
the twelfth lens element 12 has a positive refractive index, and the twelfth lens element 12 has a convex object-side surface and a convex image-side surface;
in the present embodiment, the diaphragm 13 is disposed between the third lens 3 and the fourth lens 4, but of course, in other embodiments, the diaphragm 13 may be disposed at other suitable positions.
Detailed optical data of this embodiment are shown in table 1.
Table 1 detailed optical data of example one
In the specific embodiment, TTL is 59.6mm, the total length of the lens is short, the structure is compact, the practicability is high, the weight is about 70g, and the weight is light; CRA is 6 degrees, is matched with the sensor, has good color reduction degree and uniform illumination; the size of an imaging surface is 4/3 inches, the imaging surface is larger than 22mm, the imaging surface is large, and the imaging effect is good; the light transmission F/NO is 2.8, the light transmission is large, the image edge illumination is uniform, and the imaging quality is high; f 1-26.177, f 2-16.340, f 3-12.332, f 4-22.842, f 5-13.182, f 6-17.471, f 7-17.607, f 8-12.539, f 9-38.302, f 10-15.437, f 11-12.015, and f 12-26.476.
Fig. 1 is a schematic diagram of an optical path of an optical imaging lens in this embodiment. Please refer to fig. 2, it can be seen that the MTF of the lens is greater than 0.3 at 150mm/lp, the resolution can reach the level of twenty million pixels, the imaging quality is ensured, the overall static resolution and video resolution of the scheme are greatly improved, and the development of the later-stage image optimization algorithm is greatly facilitated. Referring to fig. 3, it can be seen that the defocus amount of the lens under visible light is small. Referring to fig. 4, it can be seen that the lens improves the image color reducibility of the image through apochromatic design, and has small color difference and unobvious blue-violet phenomenon. Referring to fig. 5, it can be seen that the optical distortion is controlled within-5%, the distortion amount of the image-object correspondence is small, the image is clear and has no deformation, the imaging quality is high, the distortion is not required to be corrected by a later image algorithm, and the application is convenient. Referring to fig. 6, it can be seen that the aberration is small and the imaging quality is good.
Example two
As shown in fig. 7 to 12, the surface convexo-concave shape and the refractive index of each lens of the present embodiment are substantially the same as those of the first embodiment, and the optical parameters such as the curvature radius of the surface of each lens and the thickness of the lens are different.
The detailed optical data of this embodiment are shown in table 2.
Table 2 detailed optical data of example two
| Surface of | Type (B) | Caliber size (diameter) | Radius of curvature | Thickness of | Material of | Refractive index | Coefficient of dispersion | Focal length | |
| OBJ | Shot object surface | 0.000 | | Infinity | |||||
| 1 | First lens | 19.838 | 16.731 | 3.290 | H-ZLAF75A | 1.90366 | 31.318 | -26.057 | |
| 2 | 13.978 | 8.892 | 2.343 | ||||||
| 3 | Second lens | 13.742 | 18.563 | 2.680 | H-ZLAF4LA | 1.91083 | 36.256 | 16.983 | |
| 4 | Third lens | 14.000 | -89.973 | 1.050 | FCD100 | 1.43700 | 95.100 | -12.506 | |
| 5 | 8.402 | 5.855 | 4.287 | ||||||
| STO | 5.808 | Infinity | 1.379 | ||||||
| 7 | Fourth lens | 15.000 | -97.897 | 4.630 | H-ZF7LA | 1.80519 | 25.477 | -23.023 | |
| 8 | Fifth lens element | 15.000 | 23.621 | 5.650 | FCD515 | 1.59282 | 68.624 | 13.100 | |
| 9 | 15.000 | -10.593 | 0.100 | ||||||
| 10 | Sixth lens element | 18.098 | 21.027 | 6.410 | M-FCD1 | 1.49710 | 81.560 | 17.970 | |
| 11 | 18.564 | -14.027 | 0.100 | ||||||
| 12 | Seventh lens element | 18.000 | Infinity | 4.130 | FDS18-W | 1.94595 | 17.984 | 17.691 | |
| 13 | Eighth lens element | 18.000 | -16.953 | 1.560 | NBFD15-W | 1.80610 | 33.269 | -11.861 | |
| 14 | 15.962 | 23.210 | 1.939 | ||||||
| 15 | Ninth lens | 15.977 | 62.951 | 1.100 | H-ZF4A | 1.72825 | 28.311 | -47.146 | |
| 16 | 15.885 | 22.171 | 1.513 | ||||||
| 17 | Tenth lens | 16.400 | 167.317 | 6.430 | FCD515 | 1.59282 | 68.624 | 14.818 | |
| 18 | Eleventh lens | 16.410 | -9.172 | 1.150 | FD225 | 1.80809 | 22.764 | -11.663 | |
| 19 | 20.600 | -263.381 | 0.100 | ||||||
| 20 | Twelfth lens element | 23.400 | 30.063 | 4.750 | M-TAF101 | 1.76802 | 49.241 | 26.369 | |
| 21 | 23.400 | -58.654 | 1.000 | ||||||
| 22 | Cover glass | 22.372 | Infinity | 1.200 | H-K9L | 1.51680 | 64.212 | ||
| 23 | 22.369 | Infinity | 2.802 | ||||||
| IMA | Image plane | 22.389 | Infinity |
In the specific embodiment, TTL is 59.6mm, the total length of the lens is short, the structure is compact, the practicability is high, the weight is about 70g, and the weight is light; CRA is 6 degrees, is matched with the sensor, has good color reduction degree and uniform illumination; the size of an imaging surface is 4/3 inches, the imaging surface is larger than 22mm, the imaging surface is large, and the imaging effect is good; the light transmission F/NO is 2.8, the light transmission is large, the image edge illumination is uniform, and the imaging quality is high; f 1-26.057, f 2-16.983, f 3-12.506, f 4-23.023, f 5-13.100, f 6-17.970, f 7-17.691, f 8-11.861, f 9-47.146, f 10-14.818, f 11-11.663, and f 12-26.369.
Fig. 7 is a schematic diagram of an optical path of an optical imaging lens in this embodiment. Please refer to fig. 8, it can be seen that the MTF of the lens is greater than 0.3 at 150mm/lp, the resolution can reach the level of twenty million pixels, the imaging quality is ensured, the overall static resolution and video resolution of the scheme are greatly improved, and the development of the later-stage image optimization algorithm is greatly facilitated. Referring to fig. 9, it can be seen that the defocus amount of the lens under visible light is small. Referring to fig. 10, it can be seen that the lens improves the image color reducibility of the image through apochromatic design, and has small color difference and unobvious blue-violet phenomenon. Referring to fig. 11, it can be seen that the optical distortion is controlled within-5%, the distortion amount of the image-object correspondence is small, the image is clear and has no deformation, the imaging quality is high, the distortion is not required to be corrected by a later image algorithm, and the application is convenient. Referring to fig. 12, it can be seen that the aberration is small and the imaging quality is good.
EXAMPLE III
As shown in fig. 13 to 18, the surface convexoconcave and the refractive index of each lens of the present embodiment are substantially the same as those of the first embodiment, and the optical parameters such as the curvature radius of the surface of each lens and the thickness of the lens are different.
The detailed optical data of this embodiment are shown in table 3.
Table 3 detailed optical data of example three
In the specific embodiment, TTL is 59.6mm, the total length of the lens is short, the structure is compact, the practicability is high, the weight is about 70g, and the weight is light; CRA is 6 degrees, is matched with the sensor, has good color reduction degree and uniform illumination; the size of an imaging surface is 4/3 inches, the imaging surface is larger than 22mm, the imaging surface is large, and the imaging effect is good; the light transmission F/NO is 2.8, the light transmission is large, the image edge illumination is uniform, and the imaging quality is high; f 1-26.677, f 2-16.726, f 3-12.404, f 4-23.368, f 5-13.324, f 6-17.789, f 7-18.003, f 8-12.344, f 9-40.825, f 10-15.212, f 11-12.602, and f 12-26.500.
Fig. 13 is a schematic diagram of an optical path of an optical imaging lens in this embodiment. Referring to fig. 14, it can be seen that the MTF of the lens is greater than 0.3 at 150mm/lp, the resolution can reach the level of twenty million pixels, thereby ensuring the imaging quality, greatly improving the overall static resolution and video resolution of the scheme, and greatly facilitating the development of the later-stage image optimization algorithm. Referring to fig. 15, the defocus of the visible light is small in the visible light. Please refer to fig. 16 for a transverse chromatic aberration diagram of the lens under visible light, and it can be seen from the diagram that the lens improves the image color reducibility of the image through apochromatic design, and has small chromatic aberration to the color and unobvious blue-violet phenomenon. Referring to fig. 17, it can be seen that the optical distortion is controlled within-5%, the distortion of the image-object correspondence is small, the image is clear and has no deformation, the imaging quality is high, the distortion is not required to be corrected by the later image algorithm, and the application is convenient. Referring to fig. 18, it can be seen that the aberration is small and the imaging quality is good.
Example four
As shown in fig. 19 to 24, the surface convexoconcave and the refractive index of each lens of the present embodiment are substantially the same as those of the first embodiment, and the optical parameters such as the curvature radius of the surface of each lens and the thickness of the lens are different.
The detailed optical data of this embodiment are shown in table 4.
Table 4 detailed optical data for example four
| Surface of | Type (B) | Caliber size (diameter) | Radius of curvature | Thickness of | Material of | Refractive index | Coefficient of dispersion | Focal length | |
| OBJ | Shot object surface | 0.000 | | Infinity | |||||
| 1 | First lens | 19.423 | 16.718 | 3.290 | H-ZLAF75A | 1.90366 | 31.318 | -26.054 | |
| 2 | 13.917 | 8.887 | 2.336 | ||||||
| 3 | Second lens | 13.661 | 18.604 | 2.680 | H-ZLAF4LA | 1.91083 | 36.256 | 16.979 | |
| 4 | Third lens | 13.700 | -88.864 | 1.050 | FCD100 | 1.43700 | 95.100 | -12.495 | |
| 5 | 8.529 | 5.854 | 4.290 | ||||||
| STO | 5.971 | Infinity | 1.379 | ||||||
| 7 | Fourth lens | 15.000 | -98.008 | 4.630 | H-ZF7LA | 1.80519 | 25.477 | -23.033 | |
| 8 | Fifth lens element | 15.000 | 23.627 | 5.650 | FCD515 | 1.59282 | 68.624 | 13.100 | |
| 9 | 15.000 | -10.592 | 0.100 | ||||||
| 10 | Sixth lens element | 17.529 | 21.045 | 6.410 | M-FCD1 | 1.49710 | 81.560 | 17.969 | |
| 11 | 17.906 | -14.018 | 0.100 | ||||||
| 12 | Seventh lens element | 18.000 | Infinity | 4.130 | FDS18-W | 1.94595 | 17.984 | 17.693 | |
| 13 | Eighth lens element | 18.000 | -16.955 | 1.560 | NBFD15-W | 1.80610 | 33.269 | -11.865 | |
| 14 | 15.491 | 23.224 | 1.940 | ||||||
| 15 | Ninth lens | 15.601 | 63.192 | 1.100 | H-ZF4A | 1.72825 | 28.311 | -47.144 | |
| 16 | 15.507 | 22.202 | 1.516 | ||||||
| 17 | Tenth lens | 16.160 | 167.545 | 6.430 | FCD515 | 1.59282 | 68.624 | 14.821 | |
| 18 | Eleventh lens | 16.060 | -9.173 | 1.150 | FD225 | 1.80809 | 22.764 | -11.661 | |
| 19 | 20.600 | -265.986 | 0.100 | ||||||
| 20 | Twelfth lens element | 22.025 | 30.051 | 4.750 | M-TAF101 | 1.76802 | 49.241 | 26.421 | |
| 21 | 22.035 | -59.056 | 0.607 | ||||||
| 22 | Cover glass | 22.030 | Infinity | 1.250 | H-K9L | 1.51680 | 64.212 | ||
| 23 | 22.026 | Infinity | 3.163 | ||||||
| IMA | Image plane | 22.011 | Infinity |
In the specific embodiment, TTL is 59.6mm, the total length of the lens is short, the structure is compact, the practicability is high, the weight is about 70g, and the weight is light; CRA is 6 degrees, is matched with the sensor, has good color reduction degree and uniform illumination; the size of an imaging surface is 4/3 inches, the imaging surface is larger than 22mm, the imaging surface is large, and the imaging effect is good; the light transmission F/NO is 2.8, the light transmission is large, the image edge illumination is uniform, and the imaging quality is high; f 1-26.054, f 2-16.979, f 3-12.495, f 4-23.033, f 5-13.100, f 6-17.969, f 7-17.693, f 8-11.865, f 9-47.144, f 10-14.821, f 11-11.661, and f 12-26.421.
Fig. 19 is a schematic diagram of an optical path of an optical imaging lens in this embodiment. Please refer to fig. 20, it can be seen that the MTF of the lens is greater than 0.3 at 150mm/lp, the resolution can reach the level of twenty million pixels, the imaging quality is ensured, the overall static resolution and video resolution of the scheme are greatly improved, and the development of the later-stage image optimization algorithm is greatly facilitated. Referring to fig. 21, it can be seen that the defocus amount of the lens under visible light is small. Please refer to fig. 22 for a transverse chromatic aberration diagram of the lens under visible light, which shows that the lens improves the image color reducibility of the image through apochromatic design, and has small chromatic aberration and unobvious blue-violet phenomenon. Referring to fig. 23, it can be seen that the optical distortion is controlled within-5%, the distortion of the image-object correspondence is small, the image is clear and has no deformation, the imaging quality is high, the distortion is not required to be corrected by the later image algorithm, and the application is convenient. Referring to fig. 24, it can be seen that the aberration is small and the imaging quality is good.
EXAMPLE five
As shown in fig. 25 to 30, the surface convexoconcave and the refractive index of each lens of the present embodiment are substantially the same as those of the first embodiment, and the optical parameters such as the curvature radius of the surface of each lens and the thickness of the lens are different.
The detailed optical data of this embodiment is shown in table 5.
Table 5 detailed optical data for example five
In the specific embodiment, TTL is 59.6mm, the total length of the lens is short, the structure is compact, the practicability is high, the weight is about 70g, and the weight is light; CRA is 6 degrees, is matched with the sensor, has good color reduction degree and uniform illumination; the size of an imaging surface is 4/3 inches, the imaging surface is larger than 22mm, the imaging surface is large, and the imaging effect is good; the light transmission F/NO is 2.8, the light transmission is large, the image edge illumination is uniform, and the imaging quality is high; f 1-26.185, f 2-16.339, f 3-12.332, f 4-22.855, f 5-13.185, f 6-17.471, f 7-17.605, f 8-12.538, f 9-38.282, f 10-15.437, f 11-12.021, and f 12-26.493.
Fig. 25 is a schematic diagram of an optical path of an optical imaging lens in this embodiment. Please refer to fig. 26, it can be seen that the MTF of the lens is greater than 0.3 at 150mm/lp, the resolution can reach the level of twenty million pixels, the imaging quality is ensured, the overall static resolution and video resolution of the scheme are greatly improved, and the development of the later-stage image optimization algorithm is greatly facilitated. Referring to fig. 27, the defocus graph of visible light shows that the defocus amount of the lens under visible light is small. Please refer to fig. 28 for a transverse chromatic aberration diagram of the lens under visible light, and it can be seen from the diagram that the lens improves the image color reducibility of the image through apochromatic design, and has small chromatic aberration to the color and unobvious blue-violet phenomenon. Referring to fig. 29, it can be seen that the optical distortion is controlled within-5%, the distortion of the image and object is small, the image is clear and has no deformation, the imaging quality is high, the distortion is not corrected by the later image algorithm, and the application is convenient. Referring to fig. 30, it can be seen that the aberration is small and the imaging quality is good.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an imaging lens for unmanned aerial vehicle surveys which characterized in that: the optical lens assembly sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along an optical axis; the first lens element to the twelfth lens element each include an object-side surface facing the object side and allowing the imaging light to pass therethrough and an image-side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the second lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element with positive refractive index has a planar object-side surface and a convex image-side surface;
the eighth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the ninth lens element with a negative refractive index has a convex object-side surface and a concave image-side surface;
the tenth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface;
the eleventh lens element with a negative refractive index has a concave object-side surface and a convex image-side surface;
the twelfth lens element has a positive refractive index, and an object-side surface and an image-side surface of the twelfth lens element are convex;
the optical imaging lens has only twelve lenses with refractive indexes.
2. The imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: focal lengths of the first to ninth lenses satisfy the following condition:
-27＜f1＜-26，15＜f2＜17，-13＜f3＜-12，-24＜f4＜-22，
12＜f5＜14，16＜f6＜18，17＜f7＜19，-13＜f8＜-11，
-48＜f9＜-37，14＜f10＜16，-13＜f11＜-11，25＜f12＜27，
wherein f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11 and f12 are focal length values of the first lens to the twelfth lens respectively.
3. The imaging lens for unmanned aerial vehicle detection as claimed in claim 2, wherein: absolute values of ratios of focal lengths of the first lens to the twelfth lens to focal lengths of the lenses respectively satisfy the following conditions:
1.85＜|f1/f|＜1.95，1.15＜|f2/f|＜1.25，
0.85＜|f3/f|＜0.95，1.6＜|f4/f|＜1.75，
0.9＜|f5/f|＜1.0，1.25＜|f6/f|＜1.35，
1.25＜|f7/f|＜1.35，0.85＜|f8/f|＜0.95，
2.6＜|f9/f|＜3.5，1.0＜|f10/f|＜1.2，
0.8＜|f11/f|＜1.0，1.85＜|f12/f|＜1.95。
4. the imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: the image-side surface of the second lens element is cemented with the object-side surface of the third lens element, the image-side surface of the fourth lens element is cemented with the object-side surface of the fifth lens element, the image-side surface of the seventh lens element is cemented with the object-side surface of the eighth lens element, and the image-side surface of the tenth lens element is cemented with the object-side surface of the eleventh lens element.
5. The imaging lens for unmanned aerial vehicle detection as claimed in claim 4, characterized in that: in the cemented lens formed between the second lens and the third lens, between the fourth lens and the fifth lens, between the seventh lens and the eighth lens, and between the tenth lens and the eleventh lens, the difference between the dispersion coefficients of the two lenses is more than 30.
6. The imaging lens for unmanned aerial vehicle detection as claimed in claim 5, characterized in that: and the sixth lens and the twelfth lens are both glass aspheric lenses, and the rest lenses are all glass spherical lenses.
7. The imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: the third lens, the fifth lens, the sixth lens and the tenth lens are made of abnormal materials with negative temperature coefficient of refractive index dn/dt.
8. The imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: and the R values of the image side surfaces of the eighth lens and the ninth lens are both larger than 22 mm.
9. The imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: the camera lens still satisfies: TTL is less than 60.0mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.
10. The imaging lens for unmanned aerial vehicle detection as claimed in claim 1, wherein: the diaphragm is positioned between the third lens and the fourth lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011575988.6A CN112630936A (en) | 2020-12-28 | 2020-12-28 | Imaging lens for unmanned aerial vehicle detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011575988.6A CN112630936A (en) | 2020-12-28 | 2020-12-28 | Imaging lens for unmanned aerial vehicle detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112630936A true CN112630936A (en) | 2021-04-09 |
Family
ID=75325786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011575988.6A Pending CN112630936A (en) | 2020-12-28 | 2020-12-28 | Imaging lens for unmanned aerial vehicle detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112630936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7269388B1 (en) | 2021-11-01 | 2023-05-08 | 佳凌科技股▲ふん▼有限公司 | Optical imaging lens device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063743A (en) * | 2007-04-29 | 2007-10-31 | 上海微电子装备有限公司 | Full refraction projection optical system |
| KR20170053046A (en) * | 2015-11-05 | 2017-05-15 | 주식회사 삼양옵틱스 | Lens system and optical comprising the same |
| JP2018194816A (en) * | 2017-05-19 | 2018-12-06 | 信泰光學（深セン）有限公司 | Projection lens |
| CN109445070A (en) * | 2018-12-24 | 2019-03-08 | 江西特莱斯光学有限公司 | A kind of ultra high-definition telephoto lens |
| CN111103674A (en) * | 2020-01-15 | 2020-05-05 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN213715588U (en) * | 2020-12-28 | 2021-07-16 | 厦门力鼎光电股份有限公司 | Imaging lens for unmanned aerial vehicle detection |
-
2020
- 2020-12-28 CN CN202011575988.6A patent/CN112630936A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063743A (en) * | 2007-04-29 | 2007-10-31 | 上海微电子装备有限公司 | Full refraction projection optical system |
| KR20170053046A (en) * | 2015-11-05 | 2017-05-15 | 주식회사 삼양옵틱스 | Lens system and optical comprising the same |
| JP2018194816A (en) * | 2017-05-19 | 2018-12-06 | 信泰光學（深セン）有限公司 | Projection lens |
| CN109445070A (en) * | 2018-12-24 | 2019-03-08 | 江西特莱斯光学有限公司 | A kind of ultra high-definition telephoto lens |
| CN111103674A (en) * | 2020-01-15 | 2020-05-05 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN213715588U (en) * | 2020-12-28 | 2021-07-16 | 厦门力鼎光电股份有限公司 | Imaging lens for unmanned aerial vehicle detection |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7269388B1 (en) | 2021-11-01 | 2023-05-08 | 佳凌科技股▲ふん▼有限公司 | Optical imaging lens device |
| JP2023067683A (en) * | 2021-11-01 | 2023-05-16 | 佳凌科技股▲ふん▼有限公司 | Optical imaging lens device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110456486B (en) | Optical imaging lens | |
| CN111722378A (en) | Large-image-plane high-resolution fisheye lens | |
| CN109975965B (en) | Zoom lens | |
| CN213987004U (en) | Be applied to fisheye camera lens of VR panorama concatenation | |
| CN211955960U (en) | Optical imaging lens with fixed focus and low chromatic aberration | |
| CN213715588U (en) | Imaging lens for unmanned aerial vehicle detection | |
| CN112630936A (en) | Imaging lens for unmanned aerial vehicle detection | |
| CN112612115A (en) | Optical imaging lens | |
| CN215953950U (en) | Machine vision optical imaging lens | |
| CN214751080U (en) | Zooming security monitoring lens | |
| CN216526495U (en) | Focus-adjustable scanning lens containing liquid lens | |
| CN213069312U (en) | High-definition optical imaging lens | |
| CN113341543A (en) | Large-image-surface athermal optical imaging lens | |
| CN213069315U (en) | Internal focusing optical imaging lens | |
| CN216083248U (en) | Low-cost glass plastic lens | |
| CN213544943U (en) | Optical imaging lens | |
| CN113568146A (en) | Unmanned aerial vehicle imaging lens | |
| CN214151210U (en) | Large-target-surface imaging lens | |
| CN211826695U (en) | High-resolution zoom lens | |
| CN212321968U (en) | Large-image-plane high-resolution fisheye lens | |
| CN213780517U (en) | Optical imaging lens | |
| CN212321972U (en) | Full-color optical imaging lens | |
| CN211375167U (en) | Large-light-transmission high-resolution optical imaging lens | |
| CN211014818U (en) | Zoom lens | |
| CN113325557A (en) | Imaging lens for unmanned aerial vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |