Optical imaging lens
阅读说明:本技术 光学成像镜头 (Optical imaging lens ) 是由 张加欣 李建鹏 胡润 于 2019-11-14 设计创作,主要内容包括:本发明公开了一种光学成像镜头,由物侧至像侧沿光轴依序包括具有屈光率的第一至第七透镜。各透镜具有物侧面及像侧面。光学成像镜头满足以下条件式:(G56+T6+G67)/(TG34+GT45)≧2.600。G56为第五透镜到第六透镜在光轴上的一空气间隙。T6为第六透镜在光轴上的一厚度。G67为第六透镜到第七透镜在光轴上的一空气间隙。TG34为第三透镜的物侧面到第四透镜的物侧面在光轴上的一距离。GT45为第四透镜的像侧面到第五透镜的像侧面在光轴上的一距离。该光学成像镜头的镜头长度短且同时具有良好的成像质量。(The invention discloses an optical imaging lens which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a seventh lens from an object side to an image side along an optical axis. Each lens has an object side surface and an image side surface. The optical imaging lens satisfies the following conditional expression: (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600. G56 is an air gap on the optical axis between the fifth lens and the sixth lens. T6 is a thickness of the sixth lens element on the optical axis. G67 is an air gap on the optical axis of the sixth lens to the seventh lens. TG34 is a distance on the optical axis from the object-side surface of the third lens to the object-side surface of the fourth lens. GT45 is the distance on the optical axis from the image-side surface of the fourth lens to the image-side surface of the fifth lens. The optical imaging lens is short in lens length and good in imaging quality.)
1. An optical imaging lens comprises, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, each having an object side surface facing the object side and passing imaging light therethrough and an image side surface facing the image side and passing imaging light therethrough,
the second lens element has negative refractive index;
the third lens element has a negative refractive index;
an optical axis region of the object side surface of the fourth lens is a concave surface;
an optical axis region of the object side surface of the seventh lens is a concave surface; and
the optical imaging lens has only the seven lenses and satisfies the condition that (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600,
wherein G56 is an air gap on the optical axis between the fifth lens element and the sixth lens element, T6 is a thickness of the sixth lens element on the optical axis, G67 is an air gap on the optical axis between the sixth lens element and the seventh lens element, TG34 is a distance on the optical axis between the object-side surface of the third lens element and the object-side surface of the fourth lens element, and GT45 is a distance on the optical axis between the image-side surface of the fourth lens element and the image-side surface of the fifth lens element.
2. An optical imaging lens comprises, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, each having an object side surface facing the object side and passing imaging light therethrough and an image side surface facing the image side and passing imaging light therethrough,
the third lens element has a negative refractive index;
an optical axis region of the object side surface of the fourth lens is a concave surface;
a circumferential area of the image-side surface of the sixth lens element is convex;
an optical axis region of the object side surface of the seventh lens is a concave surface; and
the optical imaging lens has only the seven lenses and satisfies the condition that (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600,
wherein G56 is an air gap on the optical axis between the fifth lens element and the sixth lens element, T6 is a thickness of the sixth lens element on the optical axis, G67 is an air gap on the optical axis between the sixth lens element and the seventh lens element, TG34 is a distance on the optical axis between the object-side surface of the third lens element and the object-side surface of the fourth lens element, and GT45 is a distance on the optical axis between the image-side surface of the fourth lens element and the image-side surface of the fifth lens element.
3. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (G23+ T4)/T3 ≦ 5.200, where G23 is an air gap between the second lens and the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, and T3 is a thickness of the third lens on the optical axis.
4. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: v2+ V3+ V6 ≦ 110.000, where V2 is an abbe number of the second lens, V3 is an abbe number of the third lens, and V6 is an abbe number of the sixth lens.
5. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: ALT/(T5+ G56) ≦ 4.200, where ALT is a sum of seven lens thicknesses of the first lens to the seventh lens on the optical axis, and T5 is a thickness of the fifth lens on the optical axis.
6. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: ALT/BFL ≦ 5.500, where ALT is a sum of seven lens thicknesses of the first lens element to the seventh lens element on the optical axis, and BFL is a distance of the image-side surface of the seventh lens element to an imaging surface on the optical axis.
7. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: EFL/(G12+ G67) ≦ 5.600, where EFL is a system focal length of the optical imaging lens, and G12 is an air gap on the optical axis from the first lens to the second lens.
8. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T2+ G23)/T7 ≦ 2.000, where T2 is a thickness of the second lens on the optical axis, G23 is an air gap between the second lens and the third lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.
9. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T3+ T4+ T5)/T6 ≦ 2.100, where T3 is a thickness of the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, and T5 is a thickness of the fifth lens on the optical axis.
10. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: AAG/T1 ≦ 4.000, where AAG is a sum of six air gaps of the first lens to the seventh lens on the optical axis, and T1 is a thickness of the first lens on the optical axis.
11. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: TL/(G12+ T6+ T7) ≦ 4.700, where TL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens, G12 is an air gap on the optical axis from the first lens to the second lens, and T7 is a thickness of the seventh lens on the optical axis.
12. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T3+ T4)/T2 ≧ 2.800, where T3 is a thickness of the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, and T2 is a thickness of the second lens on the optical axis.
13. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (EFL + G12)/BFL ≧ 4.400, where EFL is a system focal length of the optical imaging lens, G12 is an air gap on the optical axis between the first lens element and the second lens element, and BFL is a distance on the optical axis between the image-side surface of the seventh lens element and an imaging surface.
14. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: TTL/(G23+ T4+ G56) ≦ 4.600, where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, G23 is an air gap on the optical axis from the second lens to the third lens, and T4 is a thickness of the fourth lens on the optical axis.
15. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T2+ T3+ T5)/T4 ≦ 1.900, where T2 is a thickness of the second lens on the optical axis, T3 is a thickness of the third lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, and T4 is a thickness of the fourth lens on the optical axis.
16. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: AAG/(G23+ G34) ≧ 3.500, where AAG is a sum of six air gaps on the optical axis of the first lens to the seventh lens, G23 is an air gap on the optical axis of the second lens to the third lens, and G34 is an air gap on the optical axis of the third lens to the fourth lens.
17. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: ImgH/Fno ≧ 2.500mm, where ImgH is an image height of the optical imaging lens, and Fno is an aperture value of the optical imaging lens.
18. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T1+ T4)/(T2+ T3) ≧ 1.900, where T1 is a thickness of the first lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, T2 is a thickness of the second lens on the optical axis, and T3 is a thickness of the third lens on the optical axis.
19. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (T4+ T6)/GT45 ≧ 2.800, wherein T4 is a thickness of the fourth lens on the optical axis.
20. The optical imaging lens of claim 1 or 2, wherein the optical imaging lens further satisfies the following conditional expression: (G12+ G23+ G56)/TG34 ≧ 2.500, wherein G12 is an air gap on the optical axis from the first lens to the second lens, and G23 is an air gap on the optical axis from the second lens to the third lens.
Technical Field
The invention relates to the field of optical imaging, in particular to an optical imaging lens.
Background
In recent years, optical imaging lenses have been developed, and in addition to the requirement of being light, thin, short, and small, it is also increasingly important to improve the imaging quality of the lenses, such as aberration and chromatic aberration. However, in order to meet the demand, increasing the number of optical lenses increases the distance from the object-side surface of the first lens to the image plane on the optical axis, which is not favorable for the thinning of mobile phones and digital cameras. Therefore, it has been a development goal to provide an optical imaging lens that is light, thin, short, and good in imaging quality. In addition, a small aperture value is beneficial to increase the luminous flux, a large field angle is also a market trend, and it is also important to develop an optical imaging lens with a small aperture value and a large field angle in order to design the optical imaging lens with a small, thin and small lens.
Disclosure of Invention
The invention provides an optical imaging lens which has shorter lens length and good optical imaging quality.
An optical imaging lens assembly according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each lens is provided with an object side surface facing to the object side and allowing the imaging light to pass and an image side surface facing to the image side and allowing the imaging light to pass. The second lens element has a negative refractive index. The third lens element has a negative refractive index. An optical axis region of the object side surface of the fourth lens is a concave surface. An optical axis region of the object side surface of the seventh lens is a concave surface. The optical imaging lens has only the seven lenses and satisfies (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600.
An optical imaging lens assembly according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each lens is provided with an object side surface facing to the object side and allowing the imaging light to pass and an image side surface facing to the image side and allowing the imaging light to pass. The third lens element has a negative refractive index. An optical axis region of the object side surface of the fourth lens is a concave surface. A circumferential area of the image-side surface of the sixth lens element is convex. An optical axis region of the object side surface of the seventh lens is a concave surface. The optical imaging lens has only the seven lenses and satisfies (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600.
In the optical imaging lens of the present invention, the embodiment may further selectively satisfy any one of the following conditions as occasion demands:
(G23+T4)/T3≦5.200,
V2+V3+V6≦110.000,
ALT/(T5+G56)≦4.200,
ALT/BFL≦5.500,
EFL/(G12+G67)≦5.600,
(T2+G23)/T7≦2.000,
(T3+T4+T5)/T6≦2.100,
AAG/T1≦4.000,
TL/(G12+T6+T7)≦4.700,
(T3+T4)/T2≧2.800,
(EFL+G12)/BFL≧4.400,
TTL/(G23+T4+G56)≦4.600,
(T2+T3+T5)/T4≦1.900,
AAG/(G23+G34)≧3.500,
ImgH/Fno≧2.500mm,
(T1+T4)/(T2+T3)≧1.900,
(T4+T6)/GT45≧2.800,
(G12+G23+G56)/TG34≧2.500,
wherein G12 is an air gap on the optical axis from the first lens to the second lens, G23 is an air gap on the optical axis from the second lens to the third lens, G34 is an air gap on the optical axis from the third lens to the fourth lens, G56 is an air gap on the optical axis from the fifth lens to the sixth lens, G67 is an air gap on the optical axis from the sixth lens to the seventh lens, TG34 is a distance on the optical axis from an object-side surface of the third lens to an object-side surface of the fourth lens, and GT45 is a distance on the optical axis from an image-side surface of the fourth lens to an image-side surface of the fifth lens.
T1 is the thickness of the first lens on the optical axis, T2 is the thickness of the second lens on the optical axis, and T3 is a thickness of the third lens on the optical axis. T4 is a thickness of the fourth lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, T6 is a thickness of the sixth lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.
V2 is the abbe number of the second lens, V3 is the abbe number of the third lens, and V6 is the abbe number of the sixth lens.
TTL is a distance on an optical axis from an object side surface of the first lens element to an image plane, AAG is a sum of six air gaps on the optical axis from the first lens element to the seventh lens element, ImgH is an image height of the optical imaging lens, Fno is an aperture value of the optical imaging lens, EFL is a system focal length of the optical imaging lens, BFL is a distance on the optical axis from an image side surface of the seventh lens element to the image plane, TL is a distance on the optical axis from an object side surface of the first lens element to an image side surface of the seventh lens element, and ALT is a sum of thicknesses of the seventh lens element on the optical axis from the first lens element to the seventh lens element.
In view of the above, in the optical imaging lens according to the embodiment of the invention, the first to seventh lenses are sequentially included along the optical axis from the object side to the image side, and the concave-convex curved surface arrangement design of each lens is controlled, so that the optical imaging lens meets the condition that (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600, and the optical imaging lens has a short lens length and good imaging quality.
Drawings
FIG. 1 is a schematic diagram illustrating a face structure of a lens.
Fig. 2 is a schematic diagram illustrating a surface type concave-convex structure and a light focus of a lens.
Fig. 3 is a schematic diagram illustrating a face structure of a lens according to an example.
Fig. 4 is a schematic diagram illustrating a surface structure of a lens according to a second example.
Fig. 5 is a schematic diagram illustrating a surface structure of a lens according to a third exemplary embodiment.
Fig. 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the invention.
FIG. 7 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the first embodiment.
FIG. 8 is a detailed optical data table diagram of the optical imaging lens according to the first embodiment of the present invention.
FIG. 9 is a table of aspheric parameters of an optical imaging lens according to a first embodiment of the present invention.
Fig. 10 is a schematic view of an optical imaging lens according to a second embodiment of the present invention.
FIG. 11 is a longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the second embodiment.
FIG. 12 is a detailed optical data table diagram of an optical imaging lens according to a second embodiment of the present invention.
FIG. 13 is a table of aspheric parameters of an optical imaging lens according to a second embodiment of the present invention.
Fig. 14 is a schematic view of an optical imaging lens according to a third embodiment of the present invention.
Fig. 15 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the third embodiment.
FIG. 16 is a detailed optical data table diagram of an optical imaging lens according to a third embodiment of the present invention.
FIG. 17 is a table of aspheric parameters of an optical imaging lens according to a third embodiment of the present invention.
Fig. 18 is a schematic view of an optical imaging lens according to a fourth embodiment of the present invention.
Fig. 19 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fourth embodiment.
FIG. 20 is a detailed optical data table diagram of an optical imaging lens according to a fourth embodiment of the present invention.
FIG. 21 is a table of aspheric parameters of an optical imaging lens according to a fourth embodiment of the present invention.
Fig. 22 is a schematic view of an optical imaging lens according to a fifth embodiment of the present invention.
Fig. 23 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fifth embodiment.
Fig. 24 is a detailed optical data table diagram of an optical imaging lens according to a fifth embodiment of the present invention.
Fig. 25 is a table of aspheric parameters of an optical imaging lens according to a fifth embodiment of the present invention.
Fig. 26 is a schematic view of an optical imaging lens according to a sixth embodiment of the present invention.
Fig. 27 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the sixth embodiment.
Fig. 28 is a detailed optical data table diagram of an optical imaging lens according to a sixth embodiment of the invention.
Fig. 29 is a table of aspheric parameters of an optical imaging lens according to a sixth embodiment of the invention.
Fig. 30 is a schematic view of an optical imaging lens according to a seventh embodiment of the present invention.
Fig. 31 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the seventh embodiment.
Fig. 32 is a detailed optical data table diagram of an optical imaging lens according to a seventh embodiment of the invention.
Fig. 33 is a table of aspheric parameters of an optical imaging lens according to a seventh embodiment of the invention.
Fig. 34 is a schematic view of an optical imaging lens according to an eighth embodiment of the present invention.
Fig. 35 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the eighth embodiment.
Fig. 36 is a detailed optical data table diagram of an optical imaging lens according to an eighth embodiment of the invention.
Fig. 37 is a table of aspheric parameters of an optical imaging lens according to an eighth embodiment of the invention.
Fig. 38 is a schematic view of an optical imaging lens according to a ninth embodiment of the present invention.
Fig. 39 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment.
FIG. 40 is a detailed optical data table diagram of an optical imaging lens according to a ninth embodiment of the invention.
FIG. 41 is a table of aspheric parameters of an optical imaging lens according to a ninth embodiment of the present invention.
Fig. 42 and 44 are numerical value table diagrams of important parameters and their relational expressions of the optical imaging lenses according to the first to fifth embodiments of the present invention.
Fig. 43 and 45 are numerical value table diagrams of important parameters and their relational expressions of the optical imaging lens according to the sixth to ninth embodiments of the present invention.
Detailed Description
Before beginning the detailed description of the invention, reference will first be made explicitly to the accompanying drawings in which: 100. 200, 300, 400, 500: a lens; 110. 25, 35, 45, 55, 65, 75, 95, 410, 510: an object side surface; 120. 26, 36, 46, 56, 66, 76, 96, 320: an image side; 130: an assembling part; 151. 162, 251, 262, 351, 362, 452, 461, 551, 562, 651, 652, 661, 752, 762, Z1: an optical axis region; 153. 164, 253, 264, 354, 363, 453, 454, 463, 554, 563, 654, 663, 753, 754, 763, Z2: a circumferential region; 211. 212, and (3): parallel light rays; 0: an aperture; 1: a first lens; 2: a second lens; 3: a third lens; 4: a fourth lens; 5: a fifth lens; 6: a sixth lens; 7: a seventh lens; 9: an optical filter; 10: an optical imaging lens; a1: an object side; a2: an image side; and (3) CP: a center point; CP 1: a first center point; CP 2: a second center point; TP 1: a first transition point; TP 2: a second transition point; OB: an optical boundary; i: an optical axis; lc: a chief ray; lm: an edge ray; EL: an extension line; z3: a relay area; m, R: the intersection point.
The terms "optic axis region", "circumferential region", "concave" and "convex" used in the present specification and claims should be interpreted based on the definitions set forth in the present specification.
The optical system of the present specification includes at least one lens that receives imaging light incident on the optical system within a half field of view (HFOV) angle from parallel to the optical axis. The imaging light is imaged on an imaging surface through the optical system. The term "a lens having positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens calculated by Gaussian optics theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of the imaging light rays passing through the lens surface. The imaging light includes at least two types of light: a chief ray (chief ray) Lc and a marginal ray (margin ray) Lm (shown in FIG. 1). The object-side (or image-side) surface of the lens may be divided into different regions at different positions, including an optical axis region, a circumferential region, or in some embodiments, one or more relay regions, the description of which will be described in detail below.
Fig. 1 is a radial cross-sectional view of a
A range from the center point to the first transition point TP1 is defined as an optical axis region, wherein the optical axis region includes the center point. The area radially outward of the nth switching point farthest from the optical axis I to the optical boundary OB is defined as a circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of transition points.
When a light ray parallel to the optical axis I passes through a region, the region is convex if the light ray is deflected toward the optical axis I and the intersection point with the optical axis I is located on the lens image side a 2. When a light ray parallel to the optical axis I passes through a region, the region is concave if the intersection of the extension line of the light ray and the optical axis I is located on the object side a1 of the lens.
In addition, referring to FIG. 1, the
Referring to fig. 2, an optical axis region Z1 is defined between the center point CP and the first transition point TP 1. A circumferential zone Z2 is defined between the first transition point TP1 and the optical boundary OB of the lens surface. As shown in fig. 2, the parallel
On the other hand, the determination of the surface shape irregularity of the optical axis region may be performed by the determination method of a person ordinarily skilled in the art, i.e., by determining the sign of the paraxial radius of curvature (abbreviated as R value) of the optical axis region surface shape irregularity of the lens. The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens data sheets) of optical design software. When the R value is positive, the optical axis area of the object side is judged to be a convex surface; and when the R value is negative, judging that the optical axis area of the object side surface is a concave surface. On the contrary, when the R value is positive, the optical axis area of the image side surface is judged to be a concave surface; when the R value is negative, the optical axis area of the image side surface is judged to be convex. The determination result of the method is consistent with the determination result of the intersection point between the ray/ray extension line and the optical axis, i.e. the determination method of the intersection point between the ray/ray extension line and the optical axis is to determine the surface-shaped convexo-concave by locating the focus of the ray parallel to the optical axis at the object side or the image side of the lens. Alternatively, as described herein, a region that is convex (or concave), or a region that is convex (or concave) may be used.
Fig. 3 to 5 provide examples of determining the surface shape and the zone boundary of the lens zone in each case, including the optical axis zone, the circumferential zone, and the relay zone described above.
Fig. 3 is a radial cross-sectional view of
Generally, the shape of each region bounded by the transition point is opposite to the shape of the adjacent region, and thus the transition point can be used to define the transition of the shapes from concave to convex or from convex to concave. In fig. 3, the optical axis region Z1 is concave, and the surface transitions at the transition point TP1, so the circumferential region Z2 is convex.
Fig. 4 is a radial cross-sectional view of
A circumferential region Z2 is defined between the second transition point TP2 and the optical boundary OB of the object-
Fig. 5 is a radial cross-sectional view of
Fig. 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention, and fig. 7 a to 7D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the first embodiment. Referring to fig. 6, the
The first lens element 1, the
The
The first lens element 1 has a positive refractive index. The first lens 1 is made of plastic. The
The
The
The
The
The
The
The
In this embodiment, the optical
Other detailed optical data of the first embodiment are shown in fig. 8, and the
In the present embodiment, the object-
wherein:
r: the radius of curvature of the lens surface near the optical axis I;
z: the depth of the aspheric surface (the perpendicular distance between a point on the aspheric surface that is Y from the optical axis I and a tangent plane tangent to the vertex on the optical axis I);
y: the distance between a point on the aspheric curve and the optical axis I;
k: cone constant (conc constant);
a2i: aspheric coefficients of order 2 i.
The aspheric coefficients of the terms in equation (1) for the
In addition, the relationship between the important parameters in the
Wherein the content of the first and second substances,
the EFL is the system focal length of the
the HFOV is a half view angle of the
fno is the aperture value of the
ImgH is the image height of the
t1 is the thickness of the first lens 1 on the optical axis I;
t2 is the thickness of the
t3 is the thickness of the
t4 is the thickness of the
t5 is the thickness of the
t6 is the thickness of the
t7 is the thickness of the
g12 is the distance on the optical axis I between the
g23 is the distance on the optical axis I between the image-
g34 is the distance on the optical axis I between the image-
g45 is the distance on the optical axis I between the image-
g56 is the distance on the optical axis I between the image-
g67 is the distance on the optical axis I between the image-
G7F is the distance on the optical axis I between the image-
TF is the thickness of the
GFP is the distance between the
TTL is the distance on the optical axis I from the object-
BFL is the distance on the optical axis I from the image-
AAG is the sum of six air gaps on the optical axis I of the first lens 1 to the
ALT is the sum of lens thicknesses of the first lens 1 to the
TL is the distance on the optical axis I from the object-
TG34 is the distance on the optical axis I from the object-
GT45 is the distance on the optical axis I from the image-
in addition, redefining:
f1 is the focal length of the first lens 1;
f2 is the focal length of the
f3 is the focal length of the
f4 is the focal length of the
f5 is the focal length of the
f6 is the focal length of the
f7 is the focal length of the
n1 is the refractive index of the first lens 1;
n2 is the refractive index of the
n3 is the refractive index of the
n4 is the refractive index of the
n5 is the refractive index of the
n6 is the refractive index of the
n7 is the refractive index of the
v1 is the Abbe number (Abbe number) of the first lens 1, which can also be referred to as the Abbe number (Dispersion Coefficient);
v2 is the abbe number of the
v3 is the abbe number of the
v4 is the abbe number of the
v5 is the abbe number of the
v6 is the abbe number of the
v7 is the abbe number of the
Referring to fig. 7 a to 7D, the diagram of fig. 7 a illustrates the Longitudinal Spherical Aberration (Longitudinal Spherical Aberration) of the first embodiment, the diagrams of fig. 7B and 7C illustrate the field curvature (field) Aberration and the field curvature Aberration (Tangential) Aberration on the
In the two graphs of field curvature aberration of fig. 7B and fig. 7C, the variation of focal length of the three representative wavelengths in the entire field of view is within ± 0.07 mm, which shows that the optical system of the first embodiment can effectively eliminate the aberration. The distortion aberration diagram of fig. 7D shows that the distortion aberration of the first embodiment is maintained within a range of ± 5%, which indicates that the distortion aberration of the first embodiment meets the imaging quality requirement of the optical system, and thus the first embodiment can provide good imaging quality under the condition that the system length is shortened to about 5.748 mm compared with the conventional optical lens, so that the first embodiment can shorten the lens length and has good imaging quality under the condition that good optical performance is maintained.
Fig. 10 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention, and fig. 11 a to 11D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the second embodiment. Referring to fig. 10, a second embodiment of the
The detailed optical data of the
As shown in fig. 13, the aspheric coefficients of the terms in formula (1) from the
In addition, the relationship between the important parameters in the
The longitudinal spherical aberration of the second embodiment is shown in a of fig. 11, and the deviation of the imaging points of the off-axis rays of different heights is controlled within ± 0.03 mm. In the two graphs of field curvature aberration of fig. 11B and fig. 11C, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.08 mm. The distortion aberration diagram of D in FIG. 11 shows that the distortion aberration of the second embodiment is maintained within a range of + -6%.
From the above description, it can be seen that: the system length of the second embodiment is less than the system length of the first embodiment. The half viewing angle of the second embodiment is larger than that of the first embodiment, so that the second embodiment has a larger angular range for receiving images compared to the first embodiment. Further, the longitudinal spherical aberration of the second embodiment is smaller than that of the first embodiment.
Fig. 14 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention, and fig. 15 a to 15D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the third embodiment. Referring to fig. 14, a third embodiment of the optical
The detailed optical data of the
As shown in fig. 17, the aspheric coefficients of the
In addition, the relationship between the important parameters in the
The longitudinal spherical aberration of the present third embodiment is shown in a of fig. 15, and the deviation of the imaging points of the off-axis rays of different heights is controlled within ± 0.035 mm. In the two graphs of field curvature aberration of B of fig. 15 and C of fig. 15, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.12 mm. The distortion aberration diagram of D in FIG. 15 shows that the distortion aberration of the third embodiment is maintained within a range of + -4.5%.
From the above description, it can be seen that: the system length of the third embodiment is less than the system length of the first embodiment. The half viewing angle of the third embodiment is larger than that of the first embodiment, so that the third embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the third embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the third embodiment is smaller than that of the first embodiment.
Fig. 18 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention, and fig. 19 a to 19D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the fourth embodiment. Referring to fig. 18, a fourth embodiment of the optical
Fig. 20 shows detailed optical data of the
As shown in fig. 21, the aspheric coefficients of the
In addition, the relationship between the important parameters in the
The longitudinal spherical aberration of the fourth embodiment is shown in A of FIG. 19, and the deviation of the imaging points of the off-axis rays of different heights is controlled within. + -. 0.035 mm. In the two graphs of field curvature aberration of B of fig. 19 and C of fig. 19, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.25 mm. The distortion aberration diagram of D in FIG. 19 shows that the distortion aberration of the fourth embodiment is maintained within a range of + -3.2%.
From the above description, it can be seen that: the system length of the fourth embodiment is less than the system length of the first embodiment. The half viewing angle of the fourth embodiment is larger than that of the first embodiment, so that the fourth embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the fourth embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the fourth embodiment is smaller than that of the first embodiment.
Fig. 22 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention, and fig. 23 a to 23D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the fifth embodiment. Referring to fig. 22, a fifth embodiment of the optical
Fig. 24 shows detailed optical data of the
As shown in fig. 25, the aspheric coefficients of the
Fig. 42 and 44 show relationships between important parameters in the
The longitudinal spherical aberration of the fifth embodiment is shown in a of fig. 23, and the deviation of the imaging points of the off-axis rays of different heights is controlled within ± 0.02 mm. In the two graphs of field curvature aberration of B of fig. 23 and C of fig. 23, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.16 mm. The distortion aberration diagram of D in fig. 23 shows that the distortion aberration of the fifth embodiment is maintained within a range of ± 2.8%.
From the above description, it can be seen that: the system length of the fifth embodiment is less than the system length of the first embodiment. The half viewing angle of the fifth embodiment is larger than that of the first embodiment, so that the fifth embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the fifth embodiment is smaller than that of the first embodiment. The longitudinal aberration of the fifth embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the fifth embodiment is smaller than that of the first embodiment.
Fig. 26 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention, and fig. 27 a to 27D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the sixth embodiment. Referring to fig. 26, a sixth embodiment of the optical
Fig. 28 shows detailed optical data of the
As shown in fig. 29, the aspheric coefficients of the terms in formula (1) of the
Fig. 43 and 45 show relationships between important parameters in the
The longitudinal spherical aberration of the present sixth embodiment is, as shown in a of fig. 27, controlled within ± 0.02 mm in the deviation of the imaging point of the off-axis rays of different heights. In the two graphs of field curvature aberration of B of fig. 27 and C of fig. 27, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.16 mm. The distortion aberration diagram of D in fig. 27 shows that the distortion aberration of the sixth embodiment is maintained within a range of ± 2.8%.
From the above description, it can be seen that: the system length of the sixth embodiment is less than the system length of the first embodiment. The half viewing angle of the sixth embodiment is larger than that of the first embodiment, so that the sixth embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the sixth embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the sixth embodiment is smaller than that of the first embodiment.
Fig. 30 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention, and fig. 31 a to 31D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the seventh embodiment. Referring to fig. 30, a seventh embodiment of an optical
Fig. 32 shows detailed optical data of the
As shown in fig. 33, the aspheric coefficients of the
Fig. 43 and 45 show relationships between important parameters in the
The longitudinal spherical aberration of the seventh embodiment is, as shown in a of fig. 31, controlled within ± 0.03 mm from the imaging point of the axial ray of different heights. In the two graphs of field curvature aberration of B of fig. 31 and C of fig. 31, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.12 mm. The distortion aberration diagram of D in fig. 31 shows that the distortion aberration of the seventh embodiment is maintained within a range of ± 3.5%.
From the above description, it can be seen that: the system length of the seventh embodiment is smaller than that of the first embodiment. The half viewing angle of the seventh embodiment is larger than that of the first embodiment, so that the seventh embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the seventh embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the seventh embodiment is smaller than that of the first embodiment.
Fig. 34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention, and fig. 35 a to 35D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the eighth embodiment. Referring to fig. 30, an eighth embodiment of the optical
Fig. 36 shows detailed optical data of the
As shown in fig. 37, the aspheric coefficients of the object-
Fig. 43 and 45 show relationships between important parameters in the
In the fifth embodiment, as shown in a of fig. 35, the vertical spherical aberration is controlled within ± 0.025 mm. In the two graphs of field curvature aberration of B of fig. 35 and C of fig. 35, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.09 mm. The distortion aberration diagram of D in fig. 35 shows that the distortion aberration of the eighth embodiment is maintained within a range of ± 4.5%.
From the above description, it can be seen that: the system length of the eighth embodiment is less than the system length of the first embodiment. The half viewing angle of the eighth embodiment is larger than that of the first embodiment, so that the eighth embodiment has a larger angular range for receiving images compared to the first embodiment. The aperture value of the eighth embodiment is smaller than that of the first embodiment. The longitudinal aberration of the eighth embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the eighth embodiment is smaller than that of the first embodiment.
Fig. 38 is a schematic view of an optical imaging lens according to a ninth embodiment of the invention, and fig. 39 a to 39D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the ninth embodiment. Referring to fig. 38, a ninth embodiment of the optical
Fig. 40 shows detailed optical data of the
As shown in fig. 41, the aspheric coefficients of the
Fig. 43 and 45 show relationships between important parameters in the
In the ninth embodiment, as shown in a of fig. 39, the deviation of the imaging point of the off-axis light rays of different heights is controlled within ± 0.025 mm. In the two graphs of field curvature aberration of B of fig. 39 and C of fig. 39, the variation of focal length of the three representative wavelengths over the entire field of view falls within ± 0.09 mm. The distortion aberration diagram of D in fig. 39 shows that the distortion aberration of the ninth embodiment is maintained within a range of ± 4.5%.
From the above description, it can be seen that: the system length of the ninth embodiment is less than the system length of the first embodiment. The half viewing angle of the ninth embodiment is larger than that of the first embodiment, so that the ninth embodiment has a larger angular range for receiving images compared to the first embodiment. The longitudinal aberration of the ninth embodiment is smaller than that of the first embodiment. Further, the distortion aberration of the ninth embodiment is smaller than that of the first embodiment.
Fig. 42 to 45 are table diagrams of optical parameters of the first to ninth embodiments.
In order to achieve a reduction in the system length of the
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In addition, any combination relationship of the parameters of the embodiment can be selected to increase the lens limitation, so as to facilitate the lens design with the same structure. In view of the unpredictability of the optical system design, the configuration of the present invention preferably enables the optical imaging lens depth of the embodiments of the present invention to be shortened, the available aperture to be increased, the imaging quality to be improved, or the assembly yield to be improved, thereby improving the disadvantages of the prior art.
The exemplary constraints listed above may also be optionally combined in unequal numbers for implementation aspects of the invention, and are not limited thereto. In addition to the above relations, the present invention can also be implemented to design additional features such as concave-convex curved surface arrangement of other more lenses for a single lens or a plurality of lenses to enhance the control of system performance and/or resolution. It should be noted that these details need not be selectively incorporated into other embodiments of the present invention without conflict.
In summary, the
first, the longitudinal spherical aberration, astigmatic aberration, and distortion of the embodiments of the present invention all conform to the usage specifications. In addition, the three kinds of off-axis light with red, green and blue representing wavelengths at different heights are all concentrated near the imaging point, and the deviation amplitude of each curve can show that the deviation of the imaging point of the off-axis light at different heights can be controlled, so that the spherical aberration, the aberration and the distortion suppression capability are good. Further referring to the imaging quality data, the distances between the three representative wavelengths of red, green and blue are also very close, showing that the present invention has good concentration of light of different wavelengths and excellent dispersion suppression capability in various states. In summary, the present invention can generate excellent image quality by the design and mutual matching of the lenses.
Second, in the optical imaging lens system according to the embodiment of the present invention, the refractive index of the
Third, in the optical imaging lens according to the embodiment of the present invention, in addition to the design of surface shape and refractive index, when the conditional expression (G56+ T6+ G67)/(TG34+ GT45) ≧ 2.600 is satisfied, the system length of the
Fourth, in the optical imaging lens according to the embodiment of the present invention, when the conditional expression is satisfied, V2+ V3+ V6 ≦ 110.000 may effectively improve chromatic aberration, and a preferred range is 90.000 ≦ V2+ V3+ V6 ≦ 110.000.
Fifth, in the optical imaging lens according to the embodiment of the invention, when the conditional expression is satisfied, an ImgH/Fno ≧ 2.500mm may achieve the purpose of reducing the aperture value, and a preferred range is 2.500mm ≦ ImgH/Fno ≦ 2.900 mm.
The ranges of values within the maximum and minimum values obtained from the combination of the optical parameters disclosed in the various embodiments of the present invention can be implemented.
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