CN113433667A - Optical imaging lens group and imaging system - Google Patents
Optical imaging lens group and imaging system Download PDFInfo
- Publication number
- CN113433667A CN113433667A CN202110796047.3A CN202110796047A CN113433667A CN 113433667 A CN113433667 A CN 113433667A CN 202110796047 A CN202110796047 A CN 202110796047A CN 113433667 A CN113433667 A CN 113433667A
- Authority
- CN
- China
- Prior art keywords
- lens
- optical imaging
- lens element
- lens group
- image
- 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
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
- 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 an optical imaging lens group and an imaging system, comprising: the first lens element and the eighth lens element with positive refractive power have convex and concave object-side surfaces, respectively; the object side surfaces of the second lens element and the fifth lens element with positive refractive power are convex surfaces; a third lens element, a fourth lens element, and a ninth lens element with negative refractive power having convex and concave object-side surfaces, respectively; a sixth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a seventh lens element having a convex object-side surface and a concave image-side surface; the optical imaging lens group satisfies the following relation: TTL/f is more than 1.0 and less than 2.0; wherein, TTL represents the optical total length of the optical imaging lens group, and f represents the focal length of the optical imaging lens group. The optical imaging lens group has the imaging effect which can be achieved by the multiple lenses, and can ensure stable optical performance, so that the optical imaging lens group is suitable for the market demand of lightness and thinness while providing high imaging quality.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to an optical imaging lens group and an imaging system.
Background
With the vigorous development of smart phones, people cannot leave smart phones for work, life and the like, and particularly with the increasing popularization of new media industries such as short videos, the smart phones are required to be more portable and lighter, so that the requirements on miniaturization of the smart phones and imaging systems carried therein are higher and higher.
Since the more lenses, the more difficult and costly the imaging system is to manufacture, the current imaging systems typically do not have more than seven lenses. However, the imaging effect of the seven-piece imaging system is difficult to meet the market demand of the current time. Therefore, how to ensure the stability of the imaging system while increasing the number of lenses to meet the market demand is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention provides an optical imaging lens group and an imaging system, aiming at overcoming the defects of the prior art, and solving the problem of poor stability of the imaging system with more than seven lenses in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an optical imaging lens group comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens in sequence from an object side to an image side, wherein all surfaces from an object side surface of the first lens to the image side surface of the ninth lens are aspheric surfaces;
the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface;
the second lens element with positive refractive power has a convex object-side surface at paraxial region;
the third lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the fourth lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region;
the sixth lens element with positive refractive power has a concave object-side surface and a convex image-side surface;
the object side surface of the seventh lens is convex at the paraxial region, and the image side surface of the seventh lens is concave at the paraxial region;
the eighth lens element with positive refractive power has a convex object-side surface and a concave image-side surface;
the ninth lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the optical imaging lens group satisfies the following relational expression:
1.0＜TTL/f＜2.0；
wherein, TTL represents the optical total length of the optical imaging lens group, and f represents the focal length of the optical imaging lens group.
Optionally, the optical imaging lens group further satisfies the following relation:
1.5＜f1/f＜4.0；
where f1 denotes a focal length of the first lens.
Optionally, the optical imaging lens group further satisfies the following relation:
1.9＜f3/f9＜3.1；
wherein f3 denotes a focal length of the third lens, and f9 denotes a focal length of the ninth lens.
Optionally, the optical imaging lens group further satisfies the following relation:
1.0＜(f5+f6)/f8＜2.5；
wherein f5 denotes a focal length of the fifth lens, f6 denotes a focal length of the sixth lens, and f8 denotes a focal length of the eighth lens.
Optionally, the optical imaging lens group further satisfies the following relation:
1.5＜(R12+R11)/(R12-R11)＜2.5；
wherein R11 represents the radius of curvature of the object-side surface of the first lens and R12 represents the radius of curvature of the image-side surface of the first lens.
Optionally, the optical imaging lens group further satisfies the following relation:
1.5＜R61/R62＜5.5；
0.9＜(R81+R82)/f8＜2.5；
wherein R61 denotes a radius of curvature of the sixth lens object-side surface, R62 denotes a radius of curvature of the sixth lens image-side surface, R81 denotes a radius of curvature of the eighth lens object-side surface, and R82 denotes a radius of curvature of the eighth lens image-side surface.
Optionally, the optical imaging lens group further satisfies the following relation:
3.5＜TTL/Fno＜4.5；
wherein Fno represents an aperture value of the optical imaging lens group.
Optionally, the optical imaging lens group further satisfies the following relation:
0.8＜∑CT/∑AT＜2.0；
wherein Σ CT represents the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, respectively, and Σ AT represents the sum of the air spaces on the optical axis of any adjacent two lenses of the first lens to the ninth lens.
Optionally, the optical imaging lens group further satisfies the following relation:
0.2＜(N7+N4)-(N5+N6)；
wherein N4 denotes a refractive index of the fourth lens, N5 denotes a refractive index of the fifth lens, N6 denotes a refractive index of the sixth lens, and N7 denotes a refractive index of the seventh lens.
The invention also provides an imaging system comprising an optical imaging lens group as described in any of the above.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an optical imaging lens group and an imaging system, which comprise nine lenses, wherein the optical imaging lens group meets optical parameters of a conditional expression and is matched with the surface type matching design of each lens, so that the optical imaging lens group not only has the imaging effect which can be achieved by multiple lenses, but also can ensure stable optical performance, thereby providing high imaging quality and being suitable for the market demand of light and thin.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of an optical imaging lens group according to a first embodiment of the present invention;
fig. 2 is a graph illustrating astigmatism and distortion curves of an optical imaging lens assembly according to an embodiment of the invention;
FIG. 3 is a spherical aberration curve chart of an optical imaging lens assembly according to a first embodiment of the present invention;
FIG. 4 is a schematic view showing an optical imaging lens group according to a second embodiment of the present invention;
FIG. 5 is a graph illustrating astigmatism and distortion curves of an optical imaging lens assembly according to a second embodiment of the disclosure in order from left to right;
FIG. 6 is a spherical aberration curve chart of an optical imaging lens assembly according to a second embodiment of the present invention;
FIG. 7 is a schematic view showing an optical imaging lens group according to a third embodiment of the present invention;
fig. 8 is a graph illustrating astigmatism and distortion curves of an optical imaging lens assembly according to a third embodiment of the invention in order from left to right;
FIG. 9 is a spherical aberration curve chart of an optical imaging lens assembly according to a third embodiment of the present invention;
fig. 10 is a schematic view showing an optical imaging lens group according to a fourth embodiment of the present invention;
fig. 11 is a graph illustrating astigmatism and distortion curves of an optical imaging lens assembly according to a fourth embodiment of the invention in order from left to right;
FIG. 12 is a spherical aberration chart of an optical imaging lens assembly according to a fourth embodiment of the present invention;
wherein:
a first lens: 110. 210, 310, 410;
a second lens: 120. 220, 320, 420;
a third lens: 130. 230, 330, 430;
a fourth lens: 140. 240, 340, 440;
a fifth lens: 150. 250, 350, 450;
a sixth lens: 160. 260, 360, 460;
a seventh lens: 170. 270, 370, 470;
an eighth lens: 180. 280, 380, 480;
a ninth lens: 190. 290, 390, 490;
an infrared filter: 100. 200, 300, 400;
diaphragm: 101. 201, 301, 401;
TTL: the optical total length of the optical imaging lens group;
f: a focal length of the optical imaging lens group;
f 1: a focal length of the first lens;
f 3: a focal length of the third lens;
f 5: a focal length of the fifth lens;
f 6: a focal length of the sixth lens;
f 8: a focal length of the eighth lens;
r11: a radius of curvature of the object-side surface of the first lens;
r12: the radius of curvature of the image-side surface of the first lens;
r61: a radius of curvature of an object-side surface of the sixth lens;
r62: the curvature radius of the image side surface of the sixth lens;
r81: a radius of curvature of an object-side surface of the eighth lens;
r82: the curvature radius of the image side surface of the eighth lens;
fno: an aperture value of the optical imaging lens group;
sigma CT: the sum of the central thicknesses of the first lens to the ninth lens on the optical axis;
Σ AT: the sum of the air intervals on the optical axis of any two adjacent lenses in the first lens to the ninth lens;
n4: a refractive index of the fourth lens;
n5: a refractive index of the fifth lens;
n6: a refractive index of the sixth lens;
n7: refractive index of the seventh lens.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides the following technical scheme:
an optical imaging lens group comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens from an object side to an image side in sequence. And the surfaces of the object side surface of the first lens to the image side surface of the ninth lens are aspheric surfaces.
Specifically, the surface type of each lens is as follows:
the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface; a second lens element with positive refractive power having a convex object-side surface at paraxial region; a third lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a fifth lens element with positive refractive power having a convex object-side surface at paraxial region; a sixth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a seventh lens element having a convex object-side surface and a concave image-side surface; an eighth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; the ninth lens element with negative refractive power has a convex object-side surface and a concave image-side surface.
The positive and negative collocation of the focal power of each lens in the optical imaging lens group can be reasonably controlled, the low-order aberration of the optical imaging lens group can be effectively balanced and controlled, and the tolerance sensitivity of the optical imaging lens group is reduced, so that the miniaturization of the optical imaging lens group is favorably realized.
Further, the optical imaging lens group satisfies the following relational expression: TTL/f is more than 1.0 and less than 2.0; wherein, TTL represents the optical total length of the optical imaging lens group, and f represents the focal length of the optical imaging lens group. When the relational expression is satisfied, the light can be better converged on the imaging surface of the optical imaging lens group, so that the definition and the integrity of the formed image are improved. If TTL/f is less than or equal to 1.0, the angle of the chief ray converged on the imaging surface is too large due to too long optical length, and thus the marginal ray is missed, resulting in a final image with missing parts.
Further, the optical imaging lens group also satisfies the following relational expression: f1/f is more than 1.5 and less than 4.0; where f1 denotes the focal length of the first lens. Therefore, the first lens forms negative spherical aberration, so that positive spherical aberration generated by other lenses can be balanced, and the optical imaging lens group has good imaging quality.
Further, the optical imaging lens group also satisfies the following relational expression: f3/f9 is more than 1.9 and less than 3.1; where f3 denotes a focal length of the third lens, and f9 denotes a focal length of the ninth lens. By reasonably controlling the ratio of f3 to f9, the amount of spherical aberration contribution of the third lens and the ninth lens is controlled within a reasonable range, and the imaging quality of the optical imaging lens group in an on-axis field area is improved.
Further, the optical imaging lens group also satisfies the following relational expression: 1.0 < (f5+ f6)/f8 < 2.5; where f5 denotes a focal length of the fifth lens, f6 denotes a focal length of the sixth lens, and f8 denotes a focal length of the eighth lens. When the above relational expression is satisfied, the refractive power configuration of each lens can be controlled and adjusted, so that aberration is corrected to ensure imaging quality, and the optical imaging lens group can have better light transmittance and aberration elimination effect while further optimizing optical performance, thereby satisfying the requirement of high pixel.
Further, the optical imaging lens group also satisfies the following relational expression: 1.5 < (R12+ R11)/(R12-R11) < 2.5; where R11 denotes a radius of curvature of the object-side surface of the first lens, and R12 denotes a radius of curvature of the image-side surface of the first lens. R61/R62 is more than 1.5 and less than 5.5; where R61 denotes a radius of curvature of the object-side surface of the sixth lens, and R62 denotes a radius of curvature of the image-side surface of the sixth lens. 0.9 < (R81+ R82)/f8 < 2.5, wherein R81 represents the radius of curvature of the object-side surface of the eighth lens, and R82 represents the radius of curvature of the image-side surface of the eighth lens.
The shapes of the first lens, the sixth lens and the eighth lens can be defined by the above relational expressions, and the degree of deflection of the light beam passing through the first lens, the sixth lens and the eighth lens can be reduced within a range defined by the conditional expressions, thereby reducing the aberration of the optical imaging lens group as a whole.
Further, the optical imaging lens group also satisfies the following relational expression: TTL/Fno more than 3.5 and 4.5; where Fno denotes an aperture value of the optical imaging lens group. Through the reasonable value of setting TTL/FNO, can make optical imaging lens group have big light ring effect to can improve optical imaging lens group to a certain extent and shoot the detailed effect of thing under long focus shooting.
Further, the optical imaging lens group also satisfies the following relational expression: 0.8 <. sigma CT/sigma AT < 2.0; wherein Σ CT represents the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, respectively, and Σ AT represents the sum of the air intervals on the optical axis of any adjacent two lenses of the first lens to the ninth lens. The effect of effectively reducing high-grade aberration, improving on-axis image quality, reducing sensitivity and maintaining miniaturization of the lens is achieved by reducing the light deflection angle through the relational expression.
Further, the optical imaging lens group also satisfies the following relational expression: 0.2 < (N7+ N4) - (N5+ N6); where N4 denotes a refractive index of the fourth lens, N5 denotes a refractive index of the fifth lens, N6 denotes a refractive index of the sixth lens, and N7 denotes a refractive index of the seventh lens. Since the refractive indexes of the fourth lens to the seventh lens are specified, when the conditional expressions are satisfied, the optical imaging lens group is more favorable for the development of ultra-thinness, and is also favorable for correcting aberration.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
Referring to fig. 1 to 3, fig. 1 is a schematic diagram illustrating an optical imaging lens assembly according to an embodiment of the present invention, fig. 2 is a graph of astigmatism and distortion of the optical imaging lens assembly according to the embodiment of the present invention, in order from left to right, and fig. 3 is a graph of spherical aberration of the optical imaging lens assembly according to the embodiment of the present invention.
In the embodiment of the present invention, the optical imaging lens assembly includes, in order from an object side to an image side, a first lens element 110, a stop 101, a second lens element 120, a third lens element 130, a fourth lens element 140, a fifth lens element 150, a sixth lens element 160, a seventh lens element 170, an eighth lens element 180, and a ninth lens element 190. Each of the surfaces of the object-side surface of the first lens element 110 to the image-side surface of the ninth lens element 190 is aspheric.
Specifically, the surface type of each lens is as follows:
the first lens element 110 with positive refractive power having a convex object-side surface and a concave image-side surface;
a second lens element 120 with positive refractive power having a convex object-side surface at paraxial region;
a third lens element 130 with negative refractive power having a convex object-side surface and a concave image-side surface;
the fourth lens element 140 with negative refractive power has a convex object-side surface and a concave image-side surface;
a fifth lens element 150 with positive refractive power having a convex object-side surface at a paraxial region;
the sixth lens element 160 with positive refractive power having a concave object-side surface and a convex image-side surface;
a seventh lens element 170 having a convex object-side surface and a concave image-side surface;
the eighth lens element 180 with positive refractive power having a convex object-side surface and a concave image-side surface;
the ninth lens element 190 with negative refractive power has a convex object-side surface and a concave image-side surface.
The first lens element 110 to the ninth lens element 190 do not move relatively on the optical axis, and any two adjacent lens elements of the first lens element 110 to the ninth lens element 190 may have a space on the optical axis, which is beneficial to the assembly of the lens elements and improves the manufacturing yield.
The positive and negative collocation of the focal power of each lens in the optical imaging lens group can be reasonably controlled, the low-order aberration of the optical imaging lens group can be effectively balanced and controlled, and the tolerance sensitivity of the optical imaging lens group is reduced, so that the miniaturization of the optical imaging lens group is favorably realized.
In the optical imaging lens assembly, the diaphragm 101 is located between the first lens 110 and the second lens 120, which is beneficial to reducing the front end aperture, thereby achieving the effect of reducing the size of the optical imaging lens.
In addition, the optical imaging lens assembly further comprises an infrared filter 100, wherein the infrared filter 100 is arranged between the ninth lens 190 and the imaging surface, and infrared band light entering the lens is filtered through the infrared filter 100, so that the infrared light is prevented from irradiating the photosensitive chip to generate noise. Specifically, the infrared filter 100 may be made of glass to avoid affecting the focal length.
Please refer to the following tables 1-1, 1-2 and 1-3.
Table 1-1 shows detailed structural data of the first embodiment, wherein the radius of curvature, the thickness and the focal length are in millimeters, f is the focal length of the optical imaging lens assembly, Fno is an aperture value, HFOV is half of the maximum field angle of the optical imaging lens assembly, and surfaces 0 to 23 sequentially represent surfaces from the object side to the image side, wherein surfaces 1 to 20 sequentially represent an aperture stop, an object surface of the first lens 110, an image surface of the first lens 110, an aperture stop 101, an object surface of the second lens 120, an image surface of the second lens 120, an object side surface of the third lens 130, an image side surface of the third lens 130, an object side surface of the fourth lens 140, an image side surface of the fourth lens 140, an object side surface of the fifth lens 150, an image side surface of the sixth lens 160, an object side surface of the seventh lens 170, an image side surface of the seventh lens 170, an object side surface of the eighth lens 180, an image side surface of the fifth lens 150, an image side surface of the sixth lens 160, an image side surface of the sixth lens 180, an image side surface of the eighth lens 180, a surface of the fourth lens 120, and a lens 120, The object side of ninth lens 190 and the image side of ninth lens 190.
Table 1-2 shows aspheric coefficient data in the first embodiment, wherein k represents cone coefficients in aspheric curve equation, and a4, a6, A8, a10, a12, a14 and a16 represent aspheric coefficients of orders 4, 6, 8, 10, 12, 14 and 16 of each surface.
Tables 1-3 show the conditions satisfied by the optical imaging lens assembly in the first embodiment.
In addition, the following tables in the embodiments correspond to the schematic diagrams and graphs of the embodiments, and the definitions of the data in the tables are the same as those in tables 1-1, tables 1-2 and tables 1-3 of the first embodiment, which will not be described herein again.
Example two
Referring to fig. 4 to 6, fig. 4 is a schematic diagram illustrating an optical imaging lens assembly according to a second embodiment of the present disclosure, fig. 5 is a graph of astigmatism and distortion of the optical imaging lens assembly according to the second embodiment of the present disclosure, and fig. 6 is a graph of spherical aberration of the optical imaging lens assembly according to the second embodiment of the present disclosure.
In this embodiment of the present invention, the optical imaging lens assembly includes, in order from an object side to an image side, a first lens element 210, a stop 201, a second lens element 220, a third lens element 230, a fourth lens element 240, a fifth lens element 250, a sixth lens element 260, a seventh lens element 270, an eighth lens element 280 and a ninth lens element 290. Each of the surfaces of the object-side surface of the first lens element 210 to the image-side surface of the ninth lens element 290 is aspheric.
Specifically, the surface type of each lens is as follows:
the first lens element 210 with positive refractive power having a convex object-side surface and a concave image-side surface;
a second lens element 220 with positive refractive power having a convex object-side surface at paraxial region;
the third lens element 230 with negative refractive power has a convex object-side surface and a concave image-side surface;
the fourth lens element 240 with negative refractive power having a convex object-side surface and a concave image-side surface;
a fifth lens element 250 with positive refractive power having a convex object-side surface at the paraxial region;
the sixth lens element 260 with positive refractive power having a concave object-side surface and a convex image-side surface;
a seventh lens element 270 having a convex object-side surface and a concave image-side surface;
the eighth lens element 280 with positive refractive power having a convex object-side surface and a concave image-side surface;
the ninth lens element 290 with negative refractive power has a convex object-side surface and a concave image-side surface.
The first lens element 210 to the ninth lens element 290 do not move relatively to each other on the optical axis, and any two adjacent lens elements of the first lens element 210 to the ninth lens element 290 may have a space on the optical axis, which is beneficial to the assembly of the lens elements and improves the manufacturing yield.
The positive and negative collocation of the focal power of each lens in the optical imaging lens group can be reasonably controlled, the low-order aberration of the optical imaging lens group can be effectively balanced and controlled, and the tolerance sensitivity of the optical imaging lens group is reduced, so that the miniaturization of the optical imaging lens group is favorably realized.
In the optical imaging lens assembly, the diaphragm 201 is located between the first lens 210 and the second lens 220, which is beneficial to reducing the aperture of the front end, thereby achieving the effect of reducing the size of the optical imaging lens.
In addition, the optical imaging lens assembly further includes an infrared filter 200, the infrared filter 200 is disposed between the ninth lens 280 and the imaging surface, and the infrared filter 200 filters infrared band light entering the lens, so as to prevent infrared light from irradiating the photosensitive chip to generate noise. Specifically, the infrared filter 200 may be made of glass to avoid affecting the focal length.
Please refer to the following Table 2-1, Table 2-2 and Table 2-3.
EXAMPLE III
Referring to fig. 7 to 9, fig. 7 is a schematic diagram illustrating an optical imaging lens assembly according to a third embodiment of the present disclosure, fig. 8 is a graph of astigmatism and distortion of the optical imaging lens assembly according to the third embodiment of the present disclosure, and fig. 9 is a graph of spherical aberration of the optical imaging lens assembly according to the third embodiment of the present disclosure.
In this embodiment of the present invention, the optical imaging lens assembly includes, in order from an object side to an image side, a first lens element 310, a stop 301, a second lens element 320, a third lens element 330, a fourth lens element 340, a fifth lens element 350, a sixth lens element 360, a seventh lens element 370, an eighth lens element 380, and a ninth lens element 390. Each of the surfaces of the object-side surface of the first lens element 310 to the image-side surface of the ninth lens element 390 is aspheric.
Specifically, the surface type of each lens is as follows:
the first lens element 310 with positive refractive power having a convex object-side surface and a concave image-side surface;
a second lens element 320 with positive refractive power having a convex object-side surface at paraxial region;
the third lens element 330 with negative refractive power having a convex object-side surface and a concave image-side surface;
the fourth lens element 340 with negative refractive power having a convex object-side surface and a concave image-side surface;
a fifth lens element 350 with positive refractive power having a convex object-side surface at a paraxial region;
the sixth lens element 360 with positive refractive power having a concave object-side surface and a convex image-side surface;
a seventh lens element 370 having a convex object-side surface and a concave image-side surface;
the eighth lens element 380 with positive refractive power having a convex object-side surface and a concave image-side surface;
the ninth lens element 390 with negative refractive power has a convex object-side surface and a concave image-side surface.
The first lens element 310 to the ninth lens element 390 do not move relatively on the optical axis, and any two adjacent lens elements of the first lens element 310 to the ninth lens element 390 may have a space on the optical axis, which is beneficial to the assembly of the lens elements and improves the manufacturing yield.
The positive and negative collocation of the focal power of each lens in the optical imaging lens group can be reasonably controlled, the low-order aberration of the optical imaging lens group can be effectively balanced and controlled, and the tolerance sensitivity of the optical imaging lens group is reduced, so that the miniaturization of the optical imaging lens group is favorably realized.
In the optical imaging lens assembly, the diaphragm 301 is located between the first lens 310 and the second lens 320, which is beneficial to reducing the front end aperture, thereby achieving the effect of reducing the size of the optical imaging lens.
In addition, the optical imaging lens assembly further includes an infrared filter 300, the infrared filter 300 is disposed between the ninth lens element 390 and the imaging surface, and the infrared filter 300 filters infrared band light entering the lens, so as to prevent infrared light from irradiating the photosensitive chip to generate noise. Specifically, the infrared filter 300 may be made of glass to avoid affecting the focal length.
Please refer to the following Table 3-1, Table 3-2 and Table 3-3.
Example four
Referring to fig. 10 to 12, fig. 10 is a schematic diagram illustrating an optical imaging lens assembly according to a third embodiment of the present disclosure, fig. 11 is a graph of astigmatism and distortion of the optical imaging lens assembly according to the third embodiment of the present disclosure, and fig. 12 is a graph of spherical aberration of the optical imaging lens assembly according to the third embodiment of the present disclosure.
In this embodiment of the present invention, the optical imaging lens assembly includes, in order from an object side to an image side, a first lens element 410, a stop 401, a second lens element 420, a third lens element 430, a fourth lens element 440, a fifth lens element 450, a sixth lens element 460, a seventh lens element 470, an eighth lens element 480, and a ninth lens element 490. Each of the surfaces of the object-side surface of the first lens element 410 to the image-side surface of the ninth lens element 490 is aspheric.
Specifically, the surface type of each lens is as follows:
the first lens element 410 with positive refractive power having a convex object-side surface and a concave image-side surface;
a second lens element 420 with positive refractive power having a convex object-side surface at paraxial region;
a third lens element 430 with negative refractive power having a convex object-side surface and a concave image-side surface;
the fourth lens element 440 with negative refractive power having a convex object-side surface and a concave image-side surface;
a fifth lens element 450 with positive refractive power having a convex object-side surface at the paraxial region;
the sixth lens element 460 with positive refractive power having a concave object-side surface and a convex image-side surface;
a seventh lens element 470 with a convex object-side surface and a concave image-side surface;
the eighth lens element 480 with positive refractive power having a convex object-side surface and a concave image-side surface;
the ninth lens element 490 with negative refractive power has a convex object-side surface and a concave image-side surface.
The first lens element 410 to the ninth lens element 490 do not move relatively on the optical axis, and any two adjacent lens elements of the first lens element 410 to the ninth lens element 490 may have a space on the optical axis, which is beneficial to the assembly of the lens elements and improves the manufacturing yield.
The positive and negative collocation of the focal power of each lens in the optical imaging lens group can be reasonably controlled, the low-order aberration of the optical imaging lens group can be effectively balanced and controlled, and the tolerance sensitivity of the optical imaging lens group is reduced, so that the miniaturization of the optical imaging lens group is favorably realized.
In the optical imaging lens assembly, the diaphragm 401 is located between the first lens 410 and the second lens 420, which is beneficial to reducing the aperture of the front end, thereby achieving the effect of reducing the size of the optical imaging lens.
In addition, the optical imaging lens assembly further comprises an infrared filter 400, wherein the infrared filter 400 is arranged between the ninth lens 490 and the imaging surface, and infrared band light entering the lens is filtered by the infrared filter 400, so that the infrared light is prevented from irradiating the photosensitive chip to generate noise. Specifically, the infrared filter 400 may be made of glass to avoid affecting the focal length.
Please refer to the following Table 4-1, Table 4-2 and Table 4-3.
EXAMPLE five
The invention also provides an imaging system, which comprises the optical imaging lens group provided by any embodiment, the surface shape structure of each lens in the imaging system is combined with the optimal range of optical parameters, the performance of the optical imaging lens group and key factors influencing the imaging quality of the imaging system are optimized, the optical imaging lens group has the imaging effect which can be achieved by multiple lenses, and stable optical performance can be ensured, so that the optical imaging lens group is suitable for the market demand of lightness and thinness while high imaging quality is provided.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An optical imaging lens group is characterized by comprising a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens in sequence from an object side to an image side, wherein all surfaces from an object side surface of the first lens to the image side surface of the ninth lens are aspheric surfaces;
the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface;
the second lens element with positive refractive power has a convex object-side surface at paraxial region;
the third lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the fourth lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region;
the sixth lens element with positive refractive power has a concave object-side surface and a convex image-side surface;
the object side surface of the seventh lens is convex at the paraxial region, and the image side surface of the seventh lens is concave at the paraxial region;
the eighth lens element with positive refractive power has a convex object-side surface and a concave image-side surface;
the ninth lens element with negative refractive power has a convex object-side surface and a concave image-side surface;
the optical imaging lens group satisfies the following relational expression:
1.0＜TTL/f＜2.0；
wherein, TTL represents the optical total length of the optical imaging lens group, and f represents the focal length of the optical imaging lens group.
2. An optical imaging lens group according to claim 1, further satisfying the following relation:
1.5＜f1/f＜4.0；
where f1 denotes a focal length of the first lens.
3. An optical imaging lens group according to claim 1, further satisfying the following relation:
1.9＜f3/f9＜3.1；
wherein f3 denotes a focal length of the third lens, and f9 denotes a focal length of the ninth lens.
4. An optical imaging lens group according to claim 1, further satisfying the following relation:
1.0＜(f5+f6)/f8＜2.5；
wherein f5 denotes a focal length of the fifth lens, f6 denotes a focal length of the sixth lens, and f8 denotes a focal length of the eighth lens.
5. An optical imaging lens group according to claim 1, further satisfying the following relation:
1.5＜(R12+R11)/(R12-R11)＜2.5；
wherein R11 represents a radius of curvature of the object-side surface of the first lens and R12 represents a radius of curvature of the image-side surface of the first lens.
6. An optical imaging lens group according to claim 1, further satisfying the following relation:
1.5＜R61/R62＜5.5；
0.9＜(R81+R82)/f8＜2.5；
wherein R61 denotes a radius of curvature of the sixth lens object-side surface, R62 denotes a radius of curvature of the sixth lens image-side surface, R81 denotes a radius of curvature of the eighth lens object-side surface, and R82 denotes a radius of curvature of the eighth lens image-side surface.
7. An optical imaging lens group according to claim 1, further satisfying the following relation:
3.5＜TTL/Fno＜4.5；
wherein Fno represents an aperture value of the optical imaging lens group.
8. An optical imaging lens group according to claim 1, further satisfying the following relation:
0.8＜∑CT/∑AT＜2.0；
wherein Σ CT represents the sum of the central thicknesses of the first lens to the ninth lens on the optical axis, respectively, and Σ AT represents the sum of the air spaces on the optical axis of any adjacent two lenses of the first lens to the ninth lens.
9. An optical imaging lens group according to claim 1, further satisfying the following relation:
0.2＜(N7+N4)-(N5+N6)；
wherein N4 denotes a refractive index of the fourth lens, N5 denotes a refractive index of the fifth lens, N6 denotes a refractive index of the sixth lens, and N7 denotes a refractive index of the seventh lens.
10. An imaging system comprising the optical imaging lens group according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110796047.3A CN113433667B (en) | 2021-07-14 | 2021-07-14 | Optical imaging lens group and imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110796047.3A CN113433667B (en) | 2021-07-14 | 2021-07-14 | Optical imaging lens group and imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113433667A true CN113433667A (en) | 2021-09-24 |
| CN113433667B CN113433667B (en) | 2022-09-20 |
Family
ID=77760366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110796047.3A Active CN113433667B (en) | 2021-07-14 | 2021-07-14 | Optical imaging lens group and imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113433667B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917658A (en) * | 2021-10-09 | 2022-01-11 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN114924391A (en) * | 2022-05-26 | 2022-08-19 | 广东旭业光电科技股份有限公司 | Telephoto lens and shooting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665611A (en) * | 2019-03-08 | 2020-09-15 | 康达智株式会社 | Camera lens |
-
2021
- 2021-07-14 CN CN202110796047.3A patent/CN113433667B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665611A (en) * | 2019-03-08 | 2020-09-15 | 康达智株式会社 | Camera lens |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917658A (en) * | 2021-10-09 | 2022-01-11 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN113917658B (en) * | 2021-10-09 | 2023-09-26 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN114924391A (en) * | 2022-05-26 | 2022-08-19 | 广东旭业光电科技股份有限公司 | Telephoto lens and shooting device |
| CN114924391B (en) * | 2022-05-26 | 2023-08-15 | 广东旭业光电科技股份有限公司 | Long-focus lens and shooting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113433667B (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113900228A (en) | Optical imaging lens | |
| CN112987257B (en) | Optical imaging system, image capturing module and electronic equipment | |
| CN113433667B (en) | Optical imaging lens group and imaging system | |
| TWI792886B (en) | Optical imaging lens | |
| CN110764230A (en) | Optical imaging lens | |
| CN113933962A (en) | Optical lens, camera module and electronic equipment | |
| CN113552700A (en) | Optical imaging lens | |
| CN116299987B (en) | optical lens | |
| CN115963625B (en) | Optical imaging lens | |
| CN209979920U (en) | Fisheye lens | |
| CN113126245B (en) | Lens, camera module and electronic equipment | |
| CN114236757A (en) | Optical imaging lens | |
| CN111458846A (en) | Projection lens assembly | |
| CN114236765B (en) | Lens unit and electronic equipment | |
| CN116755218B (en) | optical lens | |
| CN215494321U (en) | Lens module and light and thin electronic equipment | |
| CN113467054B (en) | Optical lens group and optical lens | |
| CN116047724B (en) | Optical lens | |
| CN114594576B (en) | Thin imaging lens group and electronic equipment | |
| CN114859512B (en) | Optical imaging lens | |
| CN117784371B (en) | Optical lens | |
| CN117008302B (en) | Optical lens | |
| CN116482843B (en) | optical lens | |
| CN217279089U9 (en) | Optical imaging lens | |
| CN219285486U (en) | 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 |