CN116430549A - Telephoto lens and electronic equipment - Google Patents
Telephoto lens and electronic equipment Download PDFInfo
- Publication number
- CN116430549A CN116430549A CN202310365654.3A CN202310365654A CN116430549A CN 116430549 A CN116430549 A CN 116430549A CN 202310365654 A CN202310365654 A CN 202310365654A CN 116430549 A CN116430549 A CN 116430549A
- Authority
- CN
- China
- Prior art keywords
- lens
- telephoto
- paraxial region
- image
- telephoto lens
- 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.)
- Granted
Links
- 238000003384 imaging method Methods 0.000 claims abstract description 19
- 101100309712 Arabidopsis thaliana SD11 gene Proteins 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 24
- 210000001747 pupil Anatomy 0.000 claims description 5
- 230000004075 alteration Effects 0.000 abstract description 16
- 201000009310 astigmatism Diseases 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000012634 optical imaging Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance 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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a telephoto lens and electronic equipment, which are composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a third lens, wherein the first lens, the second lens, the third lens and the fourth lens are sequentially arranged; the object side surfaces of the first, second and fourth lenses are convex, the image side surface is concave, the object side and image side surfaces of the third and fifth lenses are convex, and the object side and image side surfaces of the sixth lens are concave. The lens satisfies the following conditional expression: SAG11/SD11 is more than 0.25 and less than 0.65; -3.1 < R42/f4 < -0.1; SD51/R51 is more than 0.1 and less than 0.25; SAG11 is the sagittal height of the first lens image side surface, SD11 is the maximum effective radius of the second lens object side surface, R42 is the radius of curvature of the fourth lens image side surface, f4 is the focal length of the fourth lens, SD51 is the maximum effective radius of the fifth lens object side surface, and R51 is the radius of curvature of the fifth lens object side surface. The telephoto lens provided by the invention is light, thin, short and small, can well correct aberration, has high pixels, high resolution and excellent imaging quality, and can meet application requirements.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to a telephoto lens and electronic equipment.
Background
With the development of image sensor technology, electronic devices are now increasingly being portable, which requires further downsizing of the lens for electronic devices mounted with the lens.
However, as the lens size decreases, imaging performance of distant objects may be reduced to some extent, affecting user experience. Therefore, how to reduce the lens volume on the basis of ensuring the telephoto performance is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a telephoto lens and electronic equipment, and solves the problems that the imaging performance of distant objects is reduced and the user experience is affected due to the reduction of the lens size in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a telephoto lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along an object side to an image side; each of the object-side surface of the first lens to the image-side surface of the sixth lens is aspherical;
the first lens element with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the second lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the third lens element with refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;
the fourth lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;
the sixth lens element with refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the telephoto lens satisfies the following conditional expression:
0.25＜SAG11/SD11＜0.65；
-3.1＜R42/f4＜-0.1；
0.1＜SD51/R51＜0.25；
wherein SAG11 is the sagittal height of the first lens image side surface, SD11 is the maximum effective radius of the second lens object side surface, R42 is the radius of curvature of the fourth lens image side surface, f4 is the focal length of the fourth lens, SD51 is the maximum effective radius of the fifth lens object side surface, and R51 is the radius of curvature of the fifth lens object side surface.
Optionally, the telephoto lens further satisfies the following conditional expression:
0.18＜Yc62/f＜0.31；
wherein Yc62 is the vertical distance between the inflection point of the image side surface of the sixth lens and the optical axis, and f is the focal length of the telephoto lens.
Optionally, the telephoto lens further satisfies the following conditional expression:
4.7＜(f1+f5)/(ct1+ct5)＜6；
wherein f1 is a focal length of the first lens, f5 is a focal length of the fifth lens, CT1 is a thickness of the first lens on the optical axis, and CT5 is a thickness of the fifth lens on the optical axis.
Optionally, the telephoto lens further satisfies the following conditional expression:
0.61＜EPD/D42＜0.69；
where EPD is the entrance pupil diameter of the telephoto lens and D42 is the effective diameter of the image side surface of the fourth lens.
Optionally, the telephoto lens further satisfies the following conditional expression:
-1.29≤∑CT/∑ET≤1.42；
wherein Σct is the pitch of the central optical axes of the lenses, Σet is the thickness of the edges of the lenses.
Optionally, the telephoto lens further satisfies the following conditional expression:
0.76＜f/TTL＜0.79；
wherein f is the focal length of the telephoto lens, and TTL is the total optical length of the telephoto lens.
Optionally, the telephoto lens further satisfies the following conditional expression:
-3.8＜(f4+f2)/f3＜-1.5；
wherein f2 is the focal length of the second lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.
Optionally, the telephoto lens further satisfies the following conditional expression:
-0.5<SAG42/YC42<-0.15；
wherein SAG42 is the sagittal height of the fourth lens image side surface, and Yc42 is the vertical distance between the inflection point of the fourth lens image side surface and the optical axis.
Optionally, the telephoto lens further satisfies the following conditional expression:
2.0<(n2+n4)/n3<2.5；
wherein n2 is the maximum refractive index of the second lens, n3 is the maximum refractive index of the third lens, and n4 is the maximum refractive index of the fourth lens.
The invention also provides an electronic device comprising a telephoto lens as claimed in any one of the above, and an imaging element for converting an optical pattern formed by the telephoto lens into an electrical signal.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a telephoto lens and electronic equipment, which can shorten the overall length of the lens and ensure higher imaging quality while ensuring the long focal length of the lens by reasonably restraining the surface types and optical structures of a first lens, a fourth lens and a fifth lens. Therefore, the telephoto lens provided by the invention is light, thin, short and small, can well correct aberration, has high pixels, high resolution and excellent imaging quality, and can meet application requirements.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of a telephoto lens according to a first embodiment of the present invention;
FIG. 2 is a graph of astigmatism and distortion of a telephoto lens according to a first embodiment of the present invention in order from left to right;
FIG. 3 is a graph of spherical aberration of a telephoto lens according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a telephoto lens according to a second embodiment of the present invention;
FIG. 5 is a graph of astigmatism and distortion of a telephoto lens according to a second embodiment of the present invention in order from left to right;
FIG. 6 is a graph of spherical aberration of a telephoto lens according to a second embodiment of the present invention;
FIG. 7 shows a schematic diagram of a telephoto lens according to a third embodiment of the present invention;
FIG. 8 is a graph of astigmatism and distortion of a telephoto lens in accordance with a third embodiment of the present invention in order from left to right;
FIG. 9 is a graph of spherical aberration of a telephoto lens according to a third embodiment of the present invention;
FIG. 10 is a schematic diagram of a telephoto lens according to a fourth embodiment of the present invention;
FIG. 11 is a graph of astigmatism and distortion of a telephoto lens in accordance with a fourth embodiment of the present invention;
FIG. 12 is a graph of spherical aberration of a telephoto lens according to a fourth embodiment of the present invention;
FIG. 13 is a schematic view of a telephoto lens according to a fifth embodiment of the present invention;
FIG. 14 is a graph of astigmatism and distortion of a telephoto lens according to a fifth embodiment of the present invention in order from left to right;
fig. 15 is a graph of spherical aberration of a telephoto lens according to a fifth embodiment of the present invention.
In the above figures: e1, a first lens; e2, a second lens; e3, a third lens; e4, a fourth lens; e5, a fifth lens; e6, a sixth lens; e7, an infrared filter; STO and diaphragm;
s1, an object side surface of a first lens; s2, the image side surface of the first lens; s3, the object side surface of the second lens; s4, the image side surface of the second lens; s5, the object side surface of the third lens is provided; s6, the image side surface of the third lens; s7, the object side surface of the fourth lens is provided; s8, the image side surface of the fourth lens is provided; s9, the object side surface of the fifth lens is provided; s10, an image side surface of the fifth lens; s11, the object side surface of the sixth lens; s12, an image side surface of the sixth lens; s13, an imaging surface.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of 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 apparent that the embodiments described below are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it will be understood that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Furthermore, the terms "long," "short," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description of the present invention, and are not intended to indicate or imply that the apparatus or elements referred to must have this particular orientation, operate in a particular orientation configuration, and thus should not be construed as limiting the invention.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The invention provides a telephoto lens, which consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along an object side to an image side, wherein a diaphragm is arranged on the surface of the object side of the first lens; wherein each of the object-side surface of the first lens to the image-side surface of the sixth lens is aspherical.
Specifically, the first lens element with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; the second lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; the third lens element with refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region; the fourth lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region; the sixth lens element with refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region.
In addition, the telephoto lens further comprises an infrared filter, the infrared filter is arranged between the sixth lens and the imaging surface, and infrared band light entering the lens is filtered through the infrared filter, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Further, the telephoto lens satisfies the following conditional expression: SAG11/SD11 is more than 0.25 and less than 0.65; wherein SAG11 is the sagittal height of the first lens image side surface and SD11 is the maximum effective radius of the second lens object side surface. By setting the ratio of SAG11 to SD11 to be greater than 0.25 and less than 0.65, the first lens can be ensured to have appropriate optical power to correct various aberrations, and the angle formed by the peripheral portion of the first lens and the tangent line can be too small compared with that formed by the peripheral portion of the first lens, so that the processing difficulty of the first lens can be reduced, and the yield of the lens can be improved.
The telephoto lens also satisfies the following conditional expression: -3.1 < R42/f4 < -0.1; where R42 is the radius of curvature of the fourth lens image side surface, and f4 is the focal length of the fourth lens. The shape of the fourth lens is regulated by the relational expression, so that the deflection degree of the light passing through the fourth lens is weakened, and the purpose of reducing aberration is achieved.
Meanwhile, the telephoto lens satisfies the following conditional expression: SD51/R51 is more than 0.1 and less than 0.25; wherein SD51 is the maximum effective radius of the fifth lens object-side surface, and R51 is the radius of curvature of the fifth lens object-side surface. The surface shape of the fifth lens is regulated by the relational expression, so that the lens can further realize miniaturization while ensuring the long-focus performance, and the requirements of small heads in the market are met.
Further, the telephoto lens also satisfies the following conditional expression: yc62/f is more than 0.18 and less than 0.31; where Yc62 is the vertical distance between the inflection point of the sixth lens image side surface and the optical axis, and f is the focal length of the telephoto lens. When the lens meets the above conditions, the angle of incidence of the off-axis view ray on the electronic photosensitive element can be suppressed, so as to increase the receiving efficiency of the electronic photosensitive element.
Further, the telephoto lens also satisfies the following conditional expression: 4.7 < (f1+f5)/(ct1+ct5) < 6; wherein f1 is the focal length of the first lens, f5 is the focal length of the fifth lens, CT1 is the thickness of the first lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis. The ratio of the sum of the focal lengths of the first lens and the fifth lens to the sum of the center thicknesses of the first lens and the fifth lens is limited in a certain range, so that the telephoto lens has good machinability.
Further, the telephoto lens also satisfies the following conditional expression: 0.61 < EPD/D42 < 0.69; where EPD is the entrance pupil diameter of the telephoto lens and D42 is the effective diameter of the image side surface of the fourth lens. The entrance pupil of the telephoto lens has a larger value by the relational expression, so that the aperture is enlarged, and the imaging quality is improved while the miniaturization of the lens is realized.
Further, the telephoto lens also satisfies the following conditional expression: sigma CT/Sigma ET is more than or equal to 1.29 and less than or equal to 1.42; wherein Σct is the pitch of the central optical axes of the lenses, Σet is the thickness of the edges of the lenses. The distance between the central optical axes and the edge thickness of each lens meet certain conditions, so that the total length of the lens is further shortened, and the miniaturization of the lens is further realized.
Further, the telephoto lens also satisfies the following conditional expression: f/TTL is more than 0.76 and less than 0.79; where f is the focal length of the telephoto lens and TTL is the total optical length of the telephoto lens. By means of the relational expression, light rays can be guaranteed to be better converged on an imaging surface of the optical imaging lens group, and image missing is avoided.
Further, the telephoto lens also satisfies the following conditional expression: -3.8 < (f4+f2)/f3 < -1.5; wherein f2 is the focal length of the second lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens. When the focal lengths of the second lens, the third lens and the fourth lens in the telephoto lens and the focal length of each lens meet the above relation, the aberration can be corrected to ensure the imaging quality, the better light transmittance is achieved, and the requirements of high pixels and large image height are met.
Further, the telephoto lens also satisfies the following conditional expression: -0.5< SAG42/YC42< -0.15; wherein SAG42 is the sagittal height of the fourth lens image side surface, and Yc42 is the vertical distance between the inflection point of the fourth lens image side surface and the optical axis. The shape of the first lens is defined by the conditional expression, which helps to reduce distortion of the telephoto lens, thereby further improving the photographing effect.
Further, the telephoto lens also satisfies the following conditional expression: 2.0< (n2+n4)/n 3<2.5; wherein n2 is the maximum refractive index of the second lens, n3 is the maximum refractive index of the third lens, and n4 is the maximum refractive index of the fourth lens. The refractive indexes of the second lens, the third lens and the fourth lens are regulated by the relational expression, so that the telephoto lens can better correct system aberration and meet the requirement of high-performance imaging.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
Referring to fig. 1 to 3, fig. 1 is a schematic diagram of a telephoto lens according to a first embodiment of the present invention, fig. 2 is an astigmatism and distortion curve of the telephoto lens according to the first embodiment of the present invention, and fig. 3 is a spherical aberration curve of the telephoto lens according to the first embodiment of the present invention.
The present embodiment provides a telephoto lens, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 sequentially disposed along an object side to an image side, wherein a stop STO is disposed on an object side surface of the first lens E1; each of the object-side surface S1 of the first lens E1 to the image-side surface S12 of the sixth lens E6 is aspheric.
Specifically, the first lens element E1 with positive refractive power has a convex object-side surface S1 at a paraxial region thereof and a concave image-side surface S2 at a paraxial region thereof; the second lens element E2 with negative refractive power has a convex object-side surface S3 at a paraxial region and a concave image-side surface S4 at a paraxial region; the third lens element E3 with positive refractive power has a convex object-side surface S5 at a paraxial region thereof and a convex image-side surface S6 at a paraxial region thereof; the fourth lens element E4 with negative refractive power has a convex object-side surface S7 at a paraxial region and a concave image-side surface S8 at a paraxial region; the fifth lens element E5 with positive refractive power has a convex object-side surface S9 at a paraxial region thereof and a convex image-side surface S10 at a paraxial region thereof; the sixth lens element E6 with negative refractive power has a concave object-side surface S11 at a paraxial region thereof and a concave image-side surface S12 at a paraxial region thereof.
In addition, the telephoto lens further comprises an infrared filter E7, wherein the infrared filter E7 is arranged between the sixth lens E6 and the imaging surface S13, and infrared band light entering the lens is filtered through the infrared filter E7, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Please refer to the following tables 1-1, 1-2 and 1-3.
Table 1-1 shows detailed structural data of an embodiment, wherein the unit of the radius of curvature, thickness and focal length is millimeter, f is the focal length of the telephoto lens, FNo is the aperture value, and EPD is the entrance pupil diameter of the telephoto lens.
Tables 1 to 2 are aspherical coefficient data in the first embodiment, wherein k represents the cone coefficients in the aspherical curve equation, and A4, A6, A8, a10, a12, a14 and a16 represent the 4 th, 6, 8, 10, 12, 14 and 16 th order aspherical coefficients of each surface.
Tables 1 to 3 show conditions satisfied by the telephoto lens in the first embodiment.
In addition, the following tables of the embodiments are schematic diagrams and graphs corresponding to the embodiments, and the definition of data in the tables is the same as that of tables 1-1, 1-2 and 1-3 of the first embodiment, and will not be described herein.
Example two
Referring to fig. 4 to 6, fig. 4 is a schematic diagram of a telephoto lens according to a second embodiment of the present invention, fig. 5 is an astigmatism and distortion curve of the telephoto lens according to the second embodiment of the present invention, and fig. 6 is a spherical aberration curve of the telephoto lens according to the second embodiment of the present invention.
The present embodiment provides a telephoto lens, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 sequentially disposed along an object side to an image side, wherein a stop STO is disposed on an object side surface of the first lens E1; each of the object-side surface S1 of the first lens E1 to the image-side surface S12 of the sixth lens E6 is aspheric.
Specifically, the first lens element E1 with positive refractive power has a convex object-side surface S1 at a paraxial region thereof and a concave image-side surface S2 at a paraxial region thereof; the second lens element E2 with negative refractive power has a convex object-side surface S3 at a paraxial region and a concave image-side surface S4 at a paraxial region; the third lens element E3 with positive refractive power has a convex object-side surface S5 at a paraxial region thereof and a convex image-side surface S6 at a paraxial region thereof; the fourth lens element E4 with negative refractive power has a convex object-side surface S7 at a paraxial region and a concave image-side surface S8 at a paraxial region; the fifth lens element E5 with positive refractive power has a convex object-side surface S9 at a paraxial region thereof and a convex image-side surface S10 at a paraxial region thereof; the sixth lens element E6 with negative refractive power has a concave object-side surface S11 at a paraxial region thereof and a concave image-side surface S12 at a paraxial region thereof.
In addition, the telephoto lens further comprises an infrared filter E7, wherein the infrared filter E7 is arranged between the sixth lens E6 and the imaging surface S13, and infrared band light entering the lens is filtered through the infrared filter E7, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Please refer to the following tables 2-1, 2-2 and 2-3.
Example III
Referring to fig. 7 to 9, fig. 7 is a schematic diagram of a telephoto lens according to a third embodiment of the present invention, fig. 8 is an astigmatism and distortion curve of the telephoto lens according to the third embodiment of the present invention, and fig. 9 is a spherical aberration curve of the telephoto lens according to the third embodiment of the present invention.
The present embodiment provides a telephoto lens, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 sequentially disposed along an object side to an image side, wherein a stop STO is disposed on an object side surface of the first lens E1; each of the object-side surface S1 of the first lens E1 to the image-side surface S12 of the sixth lens E6 is aspheric.
Specifically, the first lens element E1 with positive refractive power has a convex object-side surface S1 at a paraxial region thereof and a concave image-side surface S2 at a paraxial region thereof; the second lens element E2 with negative refractive power has a convex object-side surface S3 at a paraxial region and a concave image-side surface S4 at a paraxial region; the third lens element E3 with positive refractive power has a convex object-side surface S5 at a paraxial region thereof and a convex image-side surface S6 at a paraxial region thereof; the fourth lens element E4 with negative refractive power has a convex object-side surface S7 at a paraxial region and a concave image-side surface S8 at a paraxial region; the fifth lens element E5 with positive refractive power has a convex object-side surface S9 at a paraxial region thereof and a convex image-side surface S10 at a paraxial region thereof; the sixth lens element E6 with negative refractive power has a concave object-side surface S11 at a paraxial region thereof and a concave image-side surface S12 at a paraxial region thereof.
In addition, the telephoto lens further comprises an infrared filter E7, wherein the infrared filter E7 is arranged between the sixth lens E6 and the imaging surface S13, and infrared band light entering the lens is filtered through the infrared filter E7, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Please refer to the following tables 3-1, 3-2 and 3-3.
Example IV
Referring to fig. 10 to 12, fig. 10 is a schematic diagram of a telephoto lens according to a fourth embodiment of the present invention, fig. 11 is an astigmatism and distortion curve of the telephoto lens according to the fourth embodiment of the present invention, and fig. 12 is a spherical aberration curve of the telephoto lens according to the fourth embodiment of the present invention.
The present embodiment provides a telephoto lens, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 sequentially disposed along an object side to an image side, wherein a stop STO is disposed on an object side surface of the first lens E1; each of the object-side surface S1 of the first lens E1 to the image-side surface S12 of the sixth lens E6 is aspheric.
Specifically, the first lens element E1 with positive refractive power has a convex object-side surface S1 at a paraxial region thereof and a concave image-side surface S2 at a paraxial region thereof; the second lens element E2 with negative refractive power has a convex object-side surface S3 at a paraxial region and a concave image-side surface S4 at a paraxial region; the third lens element E3 with positive refractive power has a convex object-side surface S5 at a paraxial region thereof and a convex image-side surface S6 at a paraxial region thereof; the fourth lens element E4 with negative refractive power has a convex object-side surface S7 at a paraxial region and a concave image-side surface S8 at a paraxial region; the fifth lens element E5 with positive refractive power has a convex object-side surface S9 at a paraxial region thereof and a convex image-side surface S10 at a paraxial region thereof; the sixth lens element E6 with negative refractive power has a concave object-side surface S11 at a paraxial region thereof and a concave image-side surface S12 at a paraxial region thereof.
In addition, the telephoto lens further comprises an infrared filter E7, wherein the infrared filter E7 is arranged between the sixth lens E6 and the imaging surface S13, and infrared band light entering the lens is filtered through the infrared filter E7, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Please refer to the following tables 4-1, 4-2 and 4-3.
Example five
Referring to fig. 13 to 15, fig. 13 is a schematic diagram of a telephoto lens according to a fifth embodiment of the present invention, fig. 14 is an astigmatism and distortion curve of the telephoto lens according to the fifth embodiment of the present invention, and fig. 15 is a spherical aberration curve of the telephoto lens according to the fifth embodiment of the present invention.
The present embodiment provides a telephoto lens, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 sequentially disposed along an object side to an image side, wherein a stop STO is disposed on an object side surface of the first lens E1; each of the object-side surface S1 of the first lens E1 to the image-side surface S12 of the sixth lens E6 is aspheric.
Specifically, the first lens element E1 with positive refractive power has a convex object-side surface S1 at a paraxial region thereof and a concave image-side surface S2 at a paraxial region thereof; the second lens element E2 with negative refractive power has a convex object-side surface S3 at a paraxial region and a concave image-side surface S4 at a paraxial region; the third lens element E3 with positive refractive power has a convex object-side surface S5 at a paraxial region thereof and a convex image-side surface S6 at a paraxial region thereof; the fourth lens element E4 with negative refractive power has a convex object-side surface S7 at a paraxial region and a concave image-side surface S8 at a paraxial region; the fifth lens element E5 with positive refractive power has a convex object-side surface S9 at a paraxial region thereof and a convex image-side surface S10 at a paraxial region thereof; the sixth lens element E6 with negative refractive power has a concave object-side surface S11 at a paraxial region thereof and a concave image-side surface S12 at a paraxial region thereof.
In addition, the telephoto lens further comprises an infrared filter E7, wherein the infrared filter E7 is arranged between the sixth lens E6 and the imaging surface S13, and infrared band light entering the lens is filtered through the infrared filter E7, so that noise generated when infrared light irradiates the photosensitive chip is avoided.
Please refer to the following tables 5-1, 5-2 and 5-3.
Example six
An embodiment of the present invention provides an electronic device including the telephoto lens in any of the embodiments above, and an imaging element for converting an optical pattern formed by the telephoto lens into an electrical signal.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The telephoto lens is characterized by comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along an object side to an image side; each of the object-side surface of the first lens to the image-side surface of the sixth lens is aspherical;
the first lens element with positive refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the second lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the third lens element with refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;
the fourth lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;
the sixth lens element with refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
the telephoto lens satisfies the following conditional expression:
0.25＜SAG11/SD11＜0.65；
-3.1＜R42/f4＜-0.1；
0.1＜SD51/R51＜0.25；
wherein SAG11 is the sagittal height of the first lens image side surface, SD11 is the maximum effective radius of the second lens object side surface, R42 is the radius of curvature of the fourth lens image side surface, f4 is the focal length of the fourth lens, SD51 is the maximum effective radius of the fifth lens object side surface, and R51 is the radius of curvature of the fifth lens object side surface.
2. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
0.18＜Yc62/f＜0.31；
wherein Yc62 is the vertical distance between the inflection point of the image side surface of the sixth lens and the optical axis, and f is the focal length of the telephoto lens.
3. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
4.7＜(f1+f5)/(ct1+ct5)＜6；
wherein f1 is a focal length of the first lens, f5 is a focal length of the fifth lens, CT1 is a thickness of the first lens on the optical axis, and CT5 is a thickness of the fifth lens on the optical axis.
4. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
0.61＜EPD/D42＜0.69；
where EPD is the entrance pupil diameter of the telephoto lens and D42 is the effective diameter of the image side surface of the fourth lens.
5. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
-1.29≤∑CT/∑ET≤1.42；
wherein Σct is the pitch of the central optical axes of the lenses, Σet is the thickness of the edges of the lenses.
6. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
0.76＜f/TTL＜0.79；
wherein f is the focal length of the telephoto lens, and TTL is the total optical length of the telephoto lens.
7. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
-3.8＜(f4+f2)/f3＜-1.5；
wherein f2 is the focal length of the second lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.
8. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
-0.5<SAG42/YC42<-0.15；
wherein SAG42 is the sagittal height of the fourth lens image side surface, and Yc42 is the vertical distance between the inflection point of the fourth lens image side surface and the optical axis.
9. The telephoto lens of claim 1, wherein the telephoto lens further satisfies the following conditional expression:
2.0<(n2+n4)/n3<2.5；
wherein n2 is the maximum refractive index of the second lens, n3 is the maximum refractive index of the third lens, and n4 is the maximum refractive index of the fourth lens.
10. An electronic device comprising the telephoto lens according to any one of claims 1 to 9, and an imaging element for converting an optical pattern formed by the telephoto lens into an electrical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310365654.3A CN116430549B (en) | 2023-04-06 | 2023-04-06 | Telephoto lens and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310365654.3A CN116430549B (en) | 2023-04-06 | 2023-04-06 | Telephoto lens and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116430549A true CN116430549A (en) | 2023-07-14 |
| CN116430549B CN116430549B (en) | 2024-01-12 |
Family
ID=87090232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310365654.3A Active CN116430549B (en) | 2023-04-06 | 2023-04-06 | Telephoto lens and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116430549B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160124184A1 (en) * | 2014-11-04 | 2016-05-05 | Ability Opto-Electronics Technology Co.Ltd. | Optical image capturing system |
| CN207396835U (en) * | 2017-11-15 | 2018-05-22 | 广东旭业光电科技股份有限公司 | A kind of optical imaging lens and picture pick-up device |
| CN109270666A (en) * | 2018-12-04 | 2019-01-25 | 广东旭业光电科技股份有限公司 | A kind of optical imaging lens and electronic equipment |
| US20200103619A1 (en) * | 2018-10-02 | 2020-04-02 | Samsung Electronics Co., Ltd. | Lens assembly and electronic device including the same |
| CN215769181U (en) * | 2020-10-12 | 2022-02-08 | 三星电机株式会社 | Optical imaging system, camera module and mobile terminal device |
| CN114200648A (en) * | 2021-12-17 | 2022-03-18 | 广东旭业光电科技股份有限公司 | High-definition optical image capturing lens and electronic equipment |
| CN115373119A (en) * | 2022-10-26 | 2022-11-22 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
-
2023
- 2023-04-06 CN CN202310365654.3A patent/CN116430549B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160124184A1 (en) * | 2014-11-04 | 2016-05-05 | Ability Opto-Electronics Technology Co.Ltd. | Optical image capturing system |
| CN207396835U (en) * | 2017-11-15 | 2018-05-22 | 广东旭业光电科技股份有限公司 | A kind of optical imaging lens and picture pick-up device |
| US20200103619A1 (en) * | 2018-10-02 | 2020-04-02 | Samsung Electronics Co., Ltd. | Lens assembly and electronic device including the same |
| CN109270666A (en) * | 2018-12-04 | 2019-01-25 | 广东旭业光电科技股份有限公司 | A kind of optical imaging lens and electronic equipment |
| CN215769181U (en) * | 2020-10-12 | 2022-02-08 | 三星电机株式会社 | Optical imaging system, camera module and mobile terminal device |
| CN114200648A (en) * | 2021-12-17 | 2022-03-18 | 广东旭业光电科技股份有限公司 | High-definition optical image capturing lens and electronic equipment |
| CN115373119A (en) * | 2022-10-26 | 2022-11-22 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116430549B (en) | 2024-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109061838B (en) | Optical imaging lens and electronic equipment | |
| TWI440922B (en) | Photographing optical lens assembly | |
| CN110007442B (en) | Image pickup optical lens | |
| CN108802962B (en) | Wide-angle imaging lens group | |
| CN109100855B (en) | Optical imaging lens group and electronic equipment | |
| CN108008525B (en) | Optical imaging system | |
| CN109765678B (en) | Camera lens and electronic equipment | |
| CN114815167B (en) | Optical system, camera module and electronic equipment | |
| CN113433656B (en) | Imaging system, lens module and electronic equipment | |
| CN114200648A (en) | High-definition optical image capturing lens and electronic equipment | |
| CN110967805A (en) | Optical camera lens assembly, image capturing module and electronic device | |
| CN111025547B (en) | Image pickup optical lens | |
| CN110045485B (en) | Image pickup optical lens | |
| CN113126261B (en) | Optical imaging lens and biological characteristic recognition device | |
| CN114002813B (en) | Five-piece type lens module and electronic equipment | |
| TWI793570B (en) | Optical imaging system,acquisition module and electronic equipment | |
| CN116430549B (en) | Telephoto lens and electronic equipment | |
| CN114019655A (en) | Optical lens, camera module and electronic equipment | |
| CN114236765B (en) | Lens unit and electronic equipment | |
| CN112505888A (en) | Optical lens, camera module and electronic equipment | |
| CN220188787U (en) | Telephoto lens and electronic equipment | |
| CN114779449B (en) | Wide-angle lens for close-range shooting | |
| CN213986980U (en) | Optical lens, camera module and electronic equipment | |
| CN214704157U (en) | Lens system and fingerprint identification device | |
| CN216411719U (en) | High-pixel optical imaging lens |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |