CN220381364U - Optical lens system - Google Patents
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- CN220381364U CN220381364U CN202321596594.8U CN202321596594U CN220381364U CN 220381364 U CN220381364 U CN 220381364U CN 202321596594 U CN202321596594 U CN 202321596594U CN 220381364 U CN220381364 U CN 220381364U
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Abstract
The present utility model provides an optical lens system comprising: five lenses, including first lens to fifth lens sequentially from object side to image side; a plurality of spacers including a fourth spacer located at and in contact with an image side of the fourth lens; a lens barrel for accommodating the lens and the spacer; the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy the following conditions: -40< V4-V5< -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air space T45 between the fourth lens and the fifth lens on the optical axis, and the center thickness CT5 of the fifth lens satisfy: -40< (r7+r8)/(CP 4+t45+ct 5) < -18. The utility model solves the problem that the back end system of the optical lens system in the prior art is easy to generate stray light.
Description
Technical Field
The utility model relates to the technical field of optical imaging equipment, in particular to an optical lens system.
Background
With the iterative development of smart phones in recent years, the preparation of an optical lens system on the smart phone is continuously used as a sharps for different and competitive brands of large smart phones. For the five-piece optical lens system, light rays directly enter an imaging surface after passing through the last lens, but more reflected light rays of the light rays in the lens and on the surface of the lens are easy to cause more non-imaging light rays to enter the imaging surface, so that the imaging quality is greatly reduced, and therefore, the rear end lens and a separator bearing the rear end lens play an important role in intercepting stray light. Therefore, how to design the effective focal length of the back-end lens and the inner and outer diameters of the spacers to improve stray light is a major issue to be addressed.
Disclosure of Invention
The utility model provides an optical lens system, which solves the problem that a rear end system of the optical lens system in the prior art is easy to generate stray light.
In order to achieve the above object, according to one aspect of the present utility model, there is provided an optical lens system comprising: five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system; a plurality of spacers including at least a fourth spacer located at the image side of the fourth lens and contacting the image side of the fourth lens; a lens barrel for accommodating the lens and the spacer; the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy: -40< V4-V5< -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth separator, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the center thickness CT5 of the fifth lens satisfy: -40< (r7+r8)/(CP 4+t45+ct 5) < -18.
According to another aspect of the present utility model, there is provided an optical lens system including: five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system; a plurality of spacers including at least a fourth spacer located at the image side of the fourth lens and contacting the image side of the fourth lens; a lens barrel for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy the following conditions: 2< |f4/d4m| (n4+n5) <18. The utility model provides a five-piece type optical lens system, because the rear end lens is especially that fourth lens and fifth lens are close to the imaging surface, the light that goes out through the fifth lens directly influences the height of imaging quality, through the effective focal length of control fourth lens and fifth lens, refractive index and the inside and outside diameter size of fourth barrier, be favorable to reducing the sensitivity of fourth lens, fifth lens, reduce lens reflection stray light, simultaneously help guaranteeing the inside diameter of the image side of fourth barrier and the optical external diameter of the thing side of fifth lens to be close, utilize the effective interception of fourth barrier to image less light, reduce the light transmission of partial non-imaging light that has the light to lead to of penetrating between lens and the lens, improve the light blocking effect in this position, make the light more convergent, promote miscellaneous light improvement effect, improve the imaging quality of optical lens system.
According to still another aspect of the present utility model, there is provided an optical lens system including: five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system; a plurality of spacers including at least a fourth spacer located at the image side of the fourth lens and contacting the image side of the fourth lens; a lens barrel for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the object-side surface of the fifth lens element has a radius of curvature R9, an image-side surface of the fifth lens element has a radius of curvature R10, an outer diameter D0m of the image-side end surface of the lens barrel, and an inner diameter D4m of the image-side surface of the fourth spacer satisfying: -1.5< (d0m+d4m)/(r9+r10) <16. The application provides a five-piece type optical lens system, because the rear end lens, especially the fourth lens and the fifth lens, are close to an imaging surface, the light rays emitted by the fifth lens directly influence the imaging quality, and the effective focal length and the curvature radius of the fourth lens and the fifth lens and the inner diameter and the outer diameter of a fourth isolating piece are controlled, so that the lens sensitivity is reduced, the stray light reflected by the lenses is reduced, and the performance and the stray light state of the optical lens system are improved; meanwhile, the fourth isolating piece is used for effectively intercepting light rays with poor imaging, so that the light rays are converged more, and the stray light improving effect is improved.
According to still another aspect of the present utility model, there is provided an optical lens system including: five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system; a plurality of spacers including at least a fourth spacer located at the image side of the fourth lens and contacting the image side of the fourth lens; a lens barrel for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the outer diameter D4s of the object side surface of the fourth spacer, the inner diameter D4m of the image side surface of the fourth spacer, the vertical distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis, and the vertical distance Yc41 between the critical point of the object side surface of the fourth lens and the optical axis satisfy: 5< (D4 s-D4 m)/(Yc 51-Yc 41) <36; the inner diameter d4m of the image side surface of the fourth spacer and the vertical distance Yc51 between the critical point of the object side surface of the fifth lens element and the optical axis satisfy the following conditions: 0< d4m/Yc51<7. The utility model provides a five-piece type optical lens system, because rear end lens is especially fourth lens and fifth lens are close to the imaging surface, the light that passes through the fifth lens outgoing directly influences the height of imaging quality, through the effective focal length of fourth lens and fifth lens, the perpendicular distance of critical point and optical axis and the inside and outside diameter of fourth barrier, thereby be favorable to controlling lens face formula and reduce lens sensitivity, reduce lens reflection stray light, utilize the effective light of blocking the formation of image of fourth barrier simultaneously, make the light more convergence, still help guaranteeing that the internal diameter of the thing side of fourth barrier is close with the optical external diameter of the image side of fourth lens, the internal diameter of the image side of fourth barrier should be close with the optical external diameter of the thing side of fifth lens, improve the light blocking effect of this position, thereby promote miscellaneous light improvement effect.
Further, the plurality of spacers at least includes a third spacer located at the image side of the third lens and in contact with the image side of the third lens, and the effective focal length f3 of the third lens, the inner diameter d4s of the object side of the fourth spacer, the inner diameter d3s of the object side of the third spacer, and the distance EP34 between the image side of the third spacer and the object side of the fourth spacer along the optical axis satisfy: 16mm < f3 x (d 4s-d3 s)/EP 34< -7mm.
Further, the plurality of spacers at least includes a second spacer located at the image side of the second lens and contacting the image side of the second lens, a third spacer located at the image side of the third lens and contacting the image side of the third lens, and the effective focal length f2 of the second lens, the distance EP23 from the image side of the second spacer to the object side of the third spacer along the optical axis, and the air interval T23 between the second lens and the third lens on the optical axis satisfy: -65< f 2/(EP 23-T23) < -28.
Further, the plurality of spacers include at least a third spacer located on the image side of the third lens and in contact with the image side of the third lens, and a radius of curvature R6 of the image side of the third lens, an outer diameter D3s of the object side of the third spacer, and an inner diameter D3s of the object side of the third spacer satisfy: -2.5< (d3s+d3s)/R6 <1.5.
Further, the plurality of spacers include at least a second spacer located on the image side of the second lens and in contact with the image side of the second lens, and the radius of curvature R5 of the object side of the third lens, the radius of curvature R4 of the image side of the second lens, the outer diameter D2m of the image side of the second spacer, and the inner diameter D2s of the object side of the second spacer satisfy the following conditions: -7< (R5-R4)/(D2 m-D2 s) <0.
Further, the plurality of spacers at least includes a first spacer located at an image side of the first lens and in contact with the image side of the first lens, and an effective focal length f1 of the first lens, an outer diameter D0s of an object side end surface of the lens barrel, an inner diameter D0s of the object side end surface of the lens barrel, and a distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis satisfy: 22mm < f1 x (d0s+d0s)/EP 01<33mm.
Further, the plurality of spacers at least includes a third spacer located at an image side of the third lens and in contact with an image side of the third lens, a combined focal length f345 of the third lens, the fourth lens and the fifth lens, a distance EP34 from the image side of the third spacer to an object side of the fourth spacer along the optical axis, a thickness CP3 of the third spacer, a thickness CP4 of the fourth spacer, and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: -7< f 345/(EP 34-CP3-CP 4-T45) <0.
Further, the plurality of spacers include at least a first spacer located at an image side of the first lens and in contact with an image side of the first lens, a second spacer located at an image side of the second lens and in contact with an image side of the second lens, and a third spacer located at an image side of the third lens and in contact with an image side of the third lens, and the following conditions are satisfied between an abbe number V1 of the first lens, an inner diameter d1s of an object side of the first spacer, an abbe number V2 of the second lens, an inner diameter d2s of an object side of the second spacer, an abbe number V3 of the third lens, an inner diameter d3s of an object side of the third spacer, a distance EP23 from an image side of the second spacer to an object side of the third spacer along an optical axis, and a distance EP12 from the image side of the first spacer to the object side of the second spacer along the optical axis: 23< (V1/d1s+V2/d2s+V3/d 3 s) (EP 23-EP 12) <38.
Further, the plurality of spacers include at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, and the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the second lens, the outer diameter D1s of the object side of the first spacer, and the inner diameter D1s of the object side of the first spacer satisfy the following conditions: -25< (r1+r2)/(D1 s-D1 s) <0.
Further, the plurality of spacers include at least a second spacer which is located on the image side of the second lens and is in contact with the image side surface of the second lens, a second auxiliary spacer which is in contact with the image side surface portion of the second spacer, and a radius of curvature R5 of the object side surface of the third lens, an outer diameter D2bm of the image side surface of the second auxiliary spacer, and an inner diameter D2bm of the image side surface of the second auxiliary spacer satisfy: -14< r 5/(D2 bm-D2 bm) <0; the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer satisfy: -35< (f2+f3)/(CP 2+cp2 b) < -15.
Further, the plurality of spacers include at least a third spacer which is located on the image side of the third lens and is in contact with the image side surface of the third lens, a third auxiliary spacer which is in contact with the image side surface portion of the third spacer, and the outer diameter D3bm of the image side surface of the third auxiliary spacer, the inner diameter D3bs of the object side surface of the third auxiliary spacer, the radius of curvature R5 of the object side surface of the third lens, and the radius of curvature R7 of the object side surface of the fourth lens satisfy the following conditions: 0< (D3bm+d3bs)/(R5-R7) <7.
Further, the plurality of spacers include at least a first spacer located at the image side of the first lens and contacting the image side of the first lens, a second spacer located at the image side of the second lens and contacting the image side of the second lens, and a third spacer located at the image side of the third lens and contacting the image side of the third lens, and an inner diameter d1s of the object side of the first spacer and an inner diameter d2s of the object side of the second spacer satisfy: d1s/d2s >1; the inner diameter d3s of the object side surface of the third separator and the inner diameter d4s of the object side surface of the fourth separator satisfy the following conditions: d3s/d4s <1.
Further, the plurality of spacers at least includes a third spacer located at an image side of the third lens and in contact with an image side of the third lens, an air space on the optical axis between the third lens and the fourth lens is the largest among air spaces on the optical axis between all adjacent two lenses, an effective focal length f3 of the third lens, an effective focal length f4 of the fourth lens, a distance EP34 from the image side of the third spacer to an object side of the fourth spacer along the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0< |f3-f4|/(EP 34-CT3+T34-CT 4) <15.
Further, the plurality of spacers include at least a third spacer which is located on the image side of the third lens and is in contact with the image side surface of the third lens, a third auxiliary spacer which is in contact with the image side surface portion of the third spacer, and a third sub auxiliary spacer which is in bearing contact with the image side surface portion of the third auxiliary spacer.
Further, the plurality of spacers include at least a second spacer which is located on the image side of the second lens and is in contact with the image side surface of the second lens, a second auxiliary spacer which is in contact with the image side surface portion of the second spacer, and a second auxiliary spacer which is in bearing contact with the image side surface portion of the second auxiliary spacer.
By applying the technical scheme of the utility model, the optical lens system comprises five lenses, a plurality of spacers and a lens barrel, wherein the five lenses sequentially comprise a first lens and a fifth lens from the object side to the image side of the optical lens system; the plurality of spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens; the lens barrel is used for accommodating the lens and the spacer; the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy: -40< V4-V5< -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth separator, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the center thickness CT5 of the fifth lens satisfy: -40< (r7+r8)/(CP 4+t45+ct 5) < -18.
The application provides a five-piece type optical lens system, because rear end lens is especially that fourth lens and fifth lens are close to the imaging surface, the light that goes out through the fifth lens directly influences the height of imaging quality, through controlling the Abbe number of fourth lens and fifth lens, effective focal length, radius of curvature, center thickness, lens interval and the inside and outside diameter and the thickness of fourth barrier, thereby be favorable to controlling the lens face formula and reduce the lens sensitivity, thereby reduce lens reflection stray light, utilize the effective interception of fourth barrier to image less light simultaneously, reduce the lens and have the partial non-imaging light transmission that the light leads to of penetrating light between the lens, make the light more convergent, promote the stray light improvement effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 shows a schematic diagram of the structure of an optical lens system of an alternative embodiment of the present utility model;
fig. 2 is a schematic view showing a structure of an optical lens system of example one of the present utility model in a first state;
fig. 3 is a schematic view showing a structure of an optical lens system of example one of the present utility model in a second state;
fig. 4 is a schematic view showing a structure of an optical lens system of example one of the present utility model in a third state;
fig. 5 to 9 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a relative illuminance curve, respectively, of example one of the present utility model;
fig. 10 is a schematic view showing the structure of an optical lens system of example two of the present utility model in a first state;
fig. 11 is a schematic view showing the structure of an optical lens system of example two of the present utility model in a second state;
fig. 12 is a schematic view showing the structure of an optical lens system of example two of the present utility model in a third state;
Fig. 13 to 17 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a relative illuminance curve, respectively, of example two of the present utility model;
fig. 18 is a schematic view showing the structure of an optical lens system of example three of the present utility model in a first state;
fig. 19 is a schematic view showing the structure of an optical lens system of example three of the present utility model in a second state;
fig. 20 is a schematic view showing the structure of an optical lens system of example three of the present utility model in a third state;
fig. 21 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a relative illuminance curve, respectively, of example three of the present utility model;
fig. 26 shows a schematic view of stray light energy of an optical lens system according to an alternative embodiment of the utility model.
Wherein the above figures include the following reference numerals:
p0, lens barrel; e1, a first lens; s1, an object side surface of a first lens; s2, an image side surface of the first lens; p1, a first spacer; e2, a second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; p2, a second spacer; p2b, a second auxiliary separator; p2c, second auxiliary spacers; e3, a third lens; s5, the object side surface of the third lens is provided; s6, an image side surface of the third lens; p3, a third spacer; p3b, third auxiliary spacers; p3c, third auxiliary spacers; e4, a fourth lens; s7, an object side surface of the fourth lens; s8, an image side surface of the fourth lens is provided; p4, fourth spacers; e5, a fifth lens; s9, an object side surface of the fifth lens; s10, an image side surface of the fifth lens; p5, fifth spacers.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.
The utility model provides an optical lens system, which solves the problem that a rear end system of the optical lens system in the prior art is easy to generate stray light.
Example 1
As shown in fig. 1 to 26, the optical lens system includes five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system, a plurality of spacers, and a lens barrel; the plurality of spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens; the lens barrel is used for accommodating the lens and the spacer; the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy: -40< V4-V5< -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth separator, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the center thickness CT5 of the fifth lens satisfy: -40< (r7+r8)/(CP 4+t45+ct 5) < -18.
The application provides a five-piece type optical lens system, because rear end lens is especially that fourth lens and fifth lens are close to the imaging surface, the light that goes out through the fifth lens directly influences the height of imaging quality, through controlling the Abbe number of fourth lens and fifth lens, effective focal length, radius of curvature, center thickness, lens interval and the inside and outside diameter and the thickness of fourth barrier, thereby be favorable to controlling the lens face formula and reduce the lens sensitivity, thereby reduce lens reflection stray light, utilize the effective interception of fourth barrier to image less light simultaneously, reduce the lens and have the partial non-imaging light transmission that the light leads to of penetrating light between the lens, make the light more convergent, promote the stray light improvement effect. As shown in fig. 26, there is less stray light in the optical lens system in the present application.
In addition, the optical lens system can balance chromatic aberration, and the imaging quality of the optical lens system is improved. Meanwhile, the edge-to-thickness ratio of the fourth lens and the fifth lens is reasonably controlled, good processing feasibility of the lenses is guaranteed, and the accuracy of bearing positions between the assembled lenses is guaranteed, so that optical parameters of the optical lens system meet design requirements, interference of the assembled lenses and the effective diameter surfaces of the lenses in the optical axis direction can be prevented, abnormal appearance and performance of the lenses are avoided, and appearance and performance yield are improved.
Preferably, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: -0.0604 < D4s > D4 m)/(f 4-f 5) < 1.5492.
Preferably, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the center thickness CT5 of the fifth lens satisfy: 35.5715 is less than or equal to (R7+R8)/(CP4+T45+CT5) and less than or equal to-23.6473.
In the present embodiment, the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy: 2< |f4/d4m| (n4+n5) <18. By limiting |f4/d4m| (N4+N5) to a reasonable range, the inner diameter of the image side surface of the fourth isolation member is guaranteed to be close to the optical outer diameter of the object side surface of the fifth lens, and the light blocking effect of the position is improved; simultaneously, the sensitivity of the fourth lens and the fifth lens is reduced, stray light is effectively improved, the transmission of partial non-imaging light caused by the transmission light between the lenses is reduced, and the imaging quality of the optical lens system is improved. Preferably, 6.8514 is less than or equal to |f4/d4mj (N4+N5) is less than or equal to 14.6346.
In this embodiment, the plurality of spacers includes at least a third spacer located on the image side of the third lens and in contact with the image side of the third lens, and the effective focal length f3 of the third lens, the inner diameter d4s of the object side of the fourth spacer, the inner diameter d3s of the object side of the third spacer, and the distance EP34 between the image side of the third spacer and the object side of the fourth spacer along the optical axis satisfy: 16mm < f3 x (d 4s-d3 s)/EP 34< -7mm. By limiting f3 (d 4s-d3 s)/EP 34 within a reasonable range, the inner diameter sizes of the object side surfaces of the third isolation piece and the fourth isolation piece can be reasonably controlled, so that the interception condition of emergent rays of the effective diameter edges of the third lens and the fourth lens can be effectively controlled, and under the condition that the illuminance of an optical lens system is ensured, the more the blocked light, the better the stray light is, and the higher the imaging quality is; simultaneously controlling the distance along the optical axis from the image side of the third spacer to the object side of the fourth spacer helps to reduce optical distortion and balances the system field curvature. Preferably, -11.9518 mm.ltoreq.f3 (d 4s-d3 s)/EP 34.ltoreq. 9.3133mm.
In the present embodiment, the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the outer diameter D0m of the image side end surface of the lens barrel, and the inner diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1.5< (d0m+d4m)/(r9+r10) <16. By limiting (D0m+d4m)/(R9+R10) to a reasonable range, the object side surface and the image side surface of the fifth lens can be effectively controlled, the sensitivity of the lens is reduced, the reflection stray light of the mirror image side of the fifth lens is reduced, and the performance and the stray light state of the optical lens system are improved; the outer diameter of the end face of the image side of the lens barrel is mainly controlled by the size of the module windowing and the size of the assembling bearing area, the sizes influence the overall appearance style of the lens barrel, and under the condition that the optical effective diameter is fixed, the better the thickness uniformity of the wall thickness of the lens barrel is, the more stable the reliability of the optical lens system is, so that the appearance control requirement is more favorably met. Preferably, -0.4571 < CHEM+d4m >/(R9+R10) < 14.9401
In this embodiment, the plurality of spacers includes at least a second spacer located at the image side of the second lens and contacting the image side of the second lens, a third spacer located at the image side of the third lens and contacting the image side of the third lens, an effective focal length f2 of the second lens, a distance EP23 from the image side of the second spacer to the object side of the third spacer along the optical axis, and an air interval T23 between the second lens and the third lens on the optical axis satisfy: -65< f 2/(EP 23-T23) < -28. By limiting f 2/(EP 23-T23) within a reasonable range, the interception condition of the second isolation piece to the emergent light of the second lens can be controlled, and under the condition of ensuring the illumination of the optical lens system, the more the light is blocked, the better the imaging quality of the optical lens system is; and meanwhile, the air interval of the second lens and the third lens on the optical axis is favorable for controlling the thickness of the third lens, so that the lens forming requirement is ensured. Preferably, -59.7423.ltoreq.f2/(EP 23-T23). Ltoreq. 33.4828.
In this embodiment, the plurality of spacers includes at least a third spacer that is located on the image side of the third lens and is in contact with the image side of the third lens, and the radius of curvature R6 of the image side of the third lens, the outer diameter D3s of the object side of the third spacer, and the inner diameter D3s of the object side of the third spacer satisfy: -2.5< (d3s+d3s)/R6 <1.5. By limiting (d3s+d3s)/R6 to a reasonable range, the inner and outer diameter dimensions of the third spacer determine the contact area of the spacer, the larger the contact area is, the more stable the assembly structure is, the inner diameter of the object side surface of the third spacer can effectively shield the reflected stray light generated by the effective diameter edge of the image side surface of the third lens, and meanwhile, the larger the thickness of the third spacer is, the more the shape and the stray light improvement effect of the third spacer are controlled. Preferably, -1.3187.ltoreq.D3s+d3s)/R6.ltoreq. 0.6682.
In this embodiment, the plurality of spacers includes at least a second spacer located on the image side of the second lens element and in contact with the image side of the second lens element, and the object-side radius of curvature R5 of the third lens element, the image-side radius of curvature R4 of the second lens element, the outer diameter D2m of the image side of the second spacer element, and the inner diameter D2s of the object-side of the second spacer element satisfy the following conditions: -7< (R5-R4)/(D2 m-D2 s) <0. By limiting (R5-R4)/(D2 m-D2 s) within a reasonable range and reasonably distributing the curvature radiuses of the second lens and the third lens, the chromatic aberration of the system can be effectively balanced, the sensitivity of the two lenses is reduced, the problem that the surface type is difficult in actual processing due to overlarge inclination angle is avoided, the inner diameter and the outer diameter of the second isolation piece are controlled, stray light is shielded, and the stray light risk is avoided. Preferably, -4.0654 is less than or equal to (R5-R4)/(D2 m-D2 s) is less than or equal to-2.3548.
In this embodiment, the plurality of spacers include at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, and the effective focal length f1 of the first lens, the outer diameter D0s of the object side end surface of the lens barrel, the inner diameter D0s of the object side end surface of the lens barrel, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis satisfy: 22mm < f1 x (d0s+d0s)/EP 01<33mm. The distance from the object side end face of the lens barrel to the object side face of the first separator along the optical axis can be effectively controlled by limiting f1 (D0s+d0s)/EP 01 in a reasonable range, so that the feasibility of lens molding is ensured; the partition piece is reasonably used between the lens barrel and the lens, so that the assembly stability of the optical lens system can be effectively improved, and the performance yield is improved; meanwhile, the first isolating piece can control the interception condition of emergent rays of the first lens, and the imaging quality of the optical lens system is higher under the condition of ensuring the illumination of the optical lens system. Preferably 26.9166 mm.ltoreq.f1 (D0s+d0s)/EP 01.ltoreq. 29.2670mm.
In this embodiment, the plurality of spacers includes at least a third spacer located on the image side of the third lens and in contact with the image side of the third lens, a combined focal length f345 of the third lens, the fourth lens and the fifth lens, a distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis, a thickness CP3 of the third spacer, a thickness CP4 of the fourth spacer, and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: -7< f 345/(EP 34-CP3-CP 4-T45) <0. By limiting f 345/(EP 34-CP3-CP 4-T45) within a reasonable range, the third lens, the fourth lens and the fifth lens are respectively connected through the third isolation piece and the fourth isolation piece, redundant light can be intercepted, the field curvature of the optical lens system is controlled by controlling the thickness of the isolation piece, the problems of parasitic light, light leakage and the like are prevented, the imaging quality is improved, and the better imaging effect is ensured. Preferably, -4.8033.ltoreq.f345/(EP 34-CP3-CP 4-T45). Ltoreq. 3.8664.
In this embodiment, the plurality of spacers includes at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, a second spacer located on the image side of the second lens and in contact with the image side of the second lens, a third spacer located on the image side of the third lens and in contact with the image side of the third lens, and the following conditions are satisfied between the abbe number V1 of the first lens, the inner diameter d1s of the object side of the first spacer, the abbe number V2 of the second lens, the inner diameter d2s of the object side of the second spacer, the abbe number V3 of the third lens, the inner diameter d3s of the object side of the third spacer, the distance EP23 from the image side of the second spacer to the object side of the third spacer along the optical axis, and the distance EP12 from the image side of the first spacer to the object side of the second spacer along the optical axis: 23< (V1/d1s+V2/d2s+V3/d 3 s) (EP 23-EP 12) <38. Through limiting (V1/d1s+V2/d2s+V3/d3s) to a reasonable range (EP 23-EP 12), the balance color difference is facilitated by controlling the collocation of the lenses with different Abbe numbers, and the imaging quality is improved; the distance between the first isolating piece, the second isolating piece and the third isolating piece is reasonably controlled, so that light convergence is controlled, the light is perfectly matched with the receiver, the edge thickness of the lens is more uniform, and the requirements on lens molding and strength are met. Preferably, 26.8511.ltoreq.V 1/d1s+V2/d2s+V3/d3s (EP 23-EP 12.ltoreq. 35.2335.
In this embodiment, the plurality of spacers includes at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, and the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the second lens, the outer diameter D1s of the object side of the first spacer, and the inner diameter D1s of the object side of the first spacer satisfy the following conditions: -25< (r1+r2)/(D1 s-D1 s) <0. The (R1+R2)/(D1 s-D1 s) is limited in a reasonable range, so that the thickness of the first lens close to the edge is controlled, the ratio of the edge thickness to the center thickness of the second lens is further controlled not to be too large, the molding requirements of the first lens and the second lens are ensured, and meanwhile, the requirement of improving the stray light of an optical lens system is met; in addition, the edge thickness of the lens is controlled not to be too large, and the increase of the reflection paths in the lens is avoided to influence the improvement of the shooting effect of the lens. Preferably, -20.2733 is less than or equal to (R1+R2)/(D1 s-D1 s) is less than or equal to-5.9681.
In this embodiment, the plurality of spacers includes at least a second spacer located on the image side of the second lens and in contact with the image side of the second lens, a second auxiliary spacer in contact with the image side portion of the second spacer, and the radius of curvature R5 of the object side of the third lens, the outer diameter D2bm of the image side of the second auxiliary spacer, and the inner diameter D2bm of the image side of the second auxiliary spacer satisfy the following conditions: -14< r 5/(D2 bm-D2 bm) <0; the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer satisfy: -35< (f2+f3)/(CP 2+cp2 b) < -15. By limiting the conditional expression to a reasonable range, the outer diameter and the inner diameter of the image side surface of the second auxiliary isolating piece are reasonably controlled, so that the shape and the stray light improving effect of the second auxiliary isolating piece are controlled, a sufficient bearing area is ensured, and the assembly stability of the optical lens system is improved; the effective focal length of the second lens and the third lens and the thickness of the isolating piece are reasonably regulated, so that the deflection angle of light rays between the second lens and the third lens can be effectively reduced, the ghost image energy between the two lenses is reduced, the optical distortion can be well reduced, and the field curvature of the system is balanced; meanwhile, the edge thicknesses of the second lens and the third lens can be reasonably distributed in the thicknesses of the second isolation piece and the second auxiliary isolation piece, so that the requirement of lens processing and forming is met, and the surface shape of the lens is smoother. Preferably, -9.5552 is less than or equal to R5/(D2 bm-D2 bm) is less than or equal to-2.6372; 29.2617 is less than or equal to (f2+f3)/(CP2+CP2b) and less than or equal to-20.1934.
In the present embodiment, the plurality of spacers includes at least a third spacer that is located on the image side of the third lens and is in contact with the image side of the third lens, a third auxiliary spacer that is in contact with the image side portion of the third spacer, and the outer diameter D3bm of the image side of the third auxiliary spacer, the inner diameter D3bs of the object side of the third auxiliary spacer, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R7 of the object side of the fourth lens satisfy the following conditions: 0< (D3bm+d3bs)/(R5-R7) <7. By limiting (D3bm+d3bs)/(R5-R7) within a reasonable range, a third isolation piece and a third auxiliary isolation piece are added between the third lens and the fourth lens, so that parasitic lights on two sides of the third lens and the fourth lens can be effectively intercepted, and the imaging quality of the optical lens system is ensured. The outer diameter of the image side surface and the inner diameter of the object side surface of the third auxiliary isolating piece are reasonably controlled, so that the shape and the stray light improving effect of the third auxiliary isolating piece are controlled, and the assembly stability of the optical lens system is improved; the curvature radius of the object side surfaces of the third lens and the fourth lens is controlled, so that the transmission of partial non-imaging light caused by the transmission light between the lenses can be reduced, the stray light can be improved, and the imaging quality can be improved. Preferably, 1.3787.ltoreq.D3bm+d3bs)/(R5-R7.ltoreq. 5.2801.
In this embodiment, the plurality of spacers includes at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, a second spacer located on the image side of the second lens and in contact with the image side of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side of the third lens, and an inner diameter d1s of the object side of the first spacer and an inner diameter d2s of the object side of the second spacer satisfy: d1s/d2s >1; the inner diameter d3s of the object side surface of the third separator and the inner diameter d4s of the object side surface of the fourth separator satisfy the following conditions: d3s/d4s <1. By limiting the conditional expression to a reasonable range and reasonably setting the inner diameters of the first, second, third and fourth isolating pieces, the vignetting value of the system can be effectively controlled, light rays with poor imaging quality can be intercepted, the light rays can be more converged, and therefore the resolution of the whole system can be improved; in addition, stray light reflected by the edge of the effective diameter of the lens for many times can be blocked, and the influence of the stray light on the imaging surface on the image quality is avoided. Preferably 1.1984.ltoreq.d1s/d2s.ltoreq. 1.2370;0.5852 is less than or equal to d3s/d4s is less than or equal to 0.5980.
In this embodiment, the plurality of spacers includes at least a third spacer located on the image side of the third lens and in contact with the image side of the third lens, the air space on the optical axis between the third lens and the fourth lens is the largest among the air spaces on the optical axis between all adjacent two lenses, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0< |f3-f4|/(EP 34-CT3+T34-CT 4) <15. By limiting |f3-f4|/(EP 34-CT3+T34-CT 4) within a reasonable range, the edge thickness of the lens and the center thickness of the lens on the optical axis are reasonably controlled, so that the lens can be ensured to have good processing feasibility, the accuracy of the bearing position between the assembled lenses is effectively ensured, and the optical parameters of the optical lens system meet the design requirements. Preferably, 4.1051.ltoreq.f3-f4.ltoreq. 10.3935 (EP 34-CT3+T34-CT 4).
In this embodiment, the plurality of spacers includes at least a third spacer that is located on the image side of the third lens and is in contact with the image side of the third lens, a third auxiliary spacer that is in contact with the image side portion of the third spacer, and a third sub auxiliary spacer that is in abutment with the image side portion of the third auxiliary spacer. Through the contact position of the third auxiliary isolating piece and the third isolating piece, on one hand, the method is favorable for intercepting redundant stray light at the edge of the fourth lens, effectively reduces stray light, improves the imaging quality of the optical lens system, and on the other hand, the method can improve the assembly stability of the optical lens system, thereby improving the performance yield.
In this embodiment, the plurality of spacers includes at least a second spacer located on the image side of the second lens and in contact with the image side of the second lens, a second auxiliary spacer in contact with the image side portion of the second spacer, and a second sub-auxiliary spacer bearing against the image side portion of the second auxiliary spacer. The thicknesses and positions of the second auxiliary isolating piece and the second isolating piece are reasonably controlled, so that the edge thicknesses of the second lens and the third lens can be reasonably distributed, and the shape and the forming requirements of the second lens and the third lens can be controlled; meanwhile, the second separator is beneficial to reducing the assembly level difference of the optical lens system, and the smaller the assembly level difference is, the better the assembly stability is; meanwhile, the thickness and the position of the second auxiliary isolating piece can effectively control the emergent light rays of the second lens and the incident light rays of the third lens, and under the condition of ensuring the illumination of the optical lens system, the more light blocking and the better the stray light improvement, the higher the imaging quality of the optical lens system.
In the present embodiment, the outer diameter D4s of the object side surface of the fourth spacer, the inner diameter D4m of the image side surface of the fourth spacer, the vertical distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis, and the vertical distance Yc41 between the critical point of the object side surface of the fourth lens and the optical axis satisfy: 5< (D4 s-D4 m)/(Yc 51-Yc 41) <36; the inner diameter d4m of the image side surface of the fourth spacer and the vertical distance Yc51 between the critical point of the object side surface of the fifth lens element and the optical axis satisfy the following conditions: 0< d4m/Yc51<7. By limiting the conditional expression to a reasonable range, the distance between the critical point of the object side surface of the fourth isolation member and the object side surface of the fourth lens element and the optical axis is controlled, so that the inner diameter of the object side surface of the fourth isolation member is guaranteed to be close to the optical outer diameter of the image side surface of the fourth lens element, the inner diameter of the image side surface of the fourth isolation member is guaranteed to be close to the optical outer diameter of the object side surface of the fifth lens element, the light blocking effect of the position is improved, and the sensitivity of the fourth lens element and the sensitivity of the fifth lens element are reduced. Preferably, 11.5715 is less than or equal to (D4 s-D4 m)/(Yc 51-Yc 41) is less than or equal to 30.4737;2.0733 d4m/Yc51 is less than or equal to 2.1173.
Example two
As shown in fig. 1 to 26, the optical lens system includes five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system, a plurality of spacers, and a lens barrel; the plurality of spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens; the lens barrel is used for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy the following conditions: 2< |f4/d4m| (n4+n5) <18.
The utility model provides a five-piece type optical lens system, because the rear end lens is especially that fourth lens and fifth lens are close to the imaging surface, the light that goes out through the fifth lens directly influences the height of imaging quality, through the effective focal length of control fourth lens and fifth lens, refractive index and the inside and outside diameter size of fourth barrier, be favorable to reducing the sensitivity of fourth lens, fifth lens, reduce lens reflection stray light, simultaneously help guaranteeing the inside diameter of the image side of fourth barrier and the optical external diameter of the thing side of fifth lens to be close, utilize the effective interception of fourth barrier to image less light, reduce the light transmission of partial non-imaging light that has the light to lead to of penetrating between lens and the lens, improve the light blocking effect in this position, make the light more convergent, promote miscellaneous light improvement effect, improve the imaging quality of optical lens system. As shown in fig. 26, there is less stray light in the optical lens system in the present application.
Other parameter formulas in the first embodiment may also be included in the present embodiment, and will not be described here again.
Example III
As shown in fig. 1 to 26, the optical lens system includes five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system, a plurality of spacers, and a lens barrel; the plurality of spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens; the lens barrel is used for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the object-side surface of the fifth lens element has a radius of curvature R9, an image-side surface of the fifth lens element has a radius of curvature R10, an outer diameter D0m of the image-side end surface of the lens barrel, and an inner diameter D4m of the image-side surface of the fourth spacer satisfying: -1.5< (d0m+d4m)/(r9+r10) <16.
The application provides a five-piece type optical lens system, because the rear end lens, especially the fourth lens and the fifth lens, are close to an imaging surface, the light rays emitted by the fifth lens directly influence the imaging quality, and the effective focal length and the curvature radius of the fourth lens and the fifth lens and the inner diameter and the outer diameter of a fourth isolating piece are controlled, so that the lens sensitivity is reduced, the stray light reflected by the lenses is reduced, and the performance and the stray light state of the optical lens system are improved; meanwhile, the fourth isolating piece is used for effectively intercepting light rays with poor imaging, so that the light rays are converged more, and the stray light improving effect is improved. As shown in fig. 26, there is less stray light in the optical lens system in the present application.
In addition, the outer diameter of the end face of the image side of the lens barrel is mainly controlled by the size of the module windowing and the size of the assembling bearing area, the sizes influence the overall appearance style of the lens barrel, and under the condition that the optical effective diameter is fixed, the better the thickness uniformity of the wall thickness of the lens barrel is, the more stable the reliability of the optical lens system is, so that the requirements of appearance control are met more favorably.
Other parameter formulas in the first embodiment may also be included in the present embodiment, and will not be described here again.
Example IV
As shown in fig. 1 to 26, the optical lens system includes five lenses including first to fifth lenses in order from an object side to an image side of the optical lens system, a plurality of spacers, and a lens barrel; the plurality of spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens; the lens barrel is used for accommodating the lens and the spacer; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3; the outer diameter D4s of the object side surface of the fourth spacer, the inner diameter D4m of the image side surface of the fourth spacer, the vertical distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis, and the vertical distance Yc41 between the critical point of the object side surface of the fourth lens and the optical axis satisfy: 5< (D4 s-D4 m)/(Yc 51-Yc 41) <36; the inner diameter d4m of the image side surface of the fourth spacer and the vertical distance Yc51 between the critical point of the object side surface of the fifth lens element and the optical axis satisfy the following conditions: 0< d4m/Yc51<7.
The utility model provides a five-piece type optical lens system, because rear end lens is especially fourth lens and fifth lens are close to the imaging surface, the light that passes through the fifth lens outgoing directly influences the height of imaging quality, through the effective focal length of fourth lens and fifth lens, the perpendicular distance of critical point and optical axis and the inside and outside diameter of fourth barrier, thereby be favorable to controlling lens face formula and reduce lens sensitivity, reduce lens reflection stray light, utilize the effective light of blocking the formation of image of fourth barrier simultaneously, make the light more convergence, still help guaranteeing that the internal diameter of the thing side of fourth barrier is close with the optical external diameter of the image side of fourth lens, the internal diameter of the image side of fourth barrier should be close with the optical external diameter of the thing side of fifth lens, improve the light blocking effect of this position, thereby promote miscellaneous light improvement effect. As shown in fig. 26, there is less stray light in the optical lens system in the present application.
Other parameter formulas in the first embodiment may also be included in the present embodiment, and will not be described here again.
Optionally, the optical lens system may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The optical lens system in the present application may employ a plurality of lenses, such as the five lenses described above. By reasonably distributing the effective focal length, the surface shape, the center thickness of each lens, the axial distance between each lens and the like, the aperture of the optical lens system can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical lens system is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones and the like.
In the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
However, those skilled in the art will appreciate that the number of lenses making up an optical lens system can be varied to achieve the various results and advantages described in this specification without departing from the technical solutions claimed herein. For example, although the description has been made by taking five lenses as an example in the embodiment, the optical lens system is not limited to include five lenses. The optical lens system may also include other numbers of lenses, if desired.
Fig. 1 shows a schematic configuration of an optical lens system of the present application. Parameters D0s, D4m, D4s, etc. are also marked in fig. 1 to clearly and intuitively understand the meaning of the parameters. In order to facilitate the presentation of the optical lens system configuration and the specific surface shape, these parameters are not shown in the drawings when specific examples are described later.
Wherein Dis refers to an outer diameter of an object side surface of the i-th spacer, dis refers to an inner diameter of the object side surface of the i-th spacer, dim refers to an outer diameter of an image side surface of the i-th spacer, dim refers to an inner diameter of the image side surface of the i-th spacer, cpci refers to a thickness of the i-th spacer, that is, a maximum distance from the object side surface of the i-th spacer to the image side surface in an optical axis direction, epi j refers to a distance from the image side surface of the i-th spacer to the object side surface of the j-th spacer in the optical axis direction, wherein i and j are positive integers equal to or greater than 1. And D0s is the inner diameter of the object side end surface of the lens barrel, and D0m is the outer diameter of the image side end surface of the lens barrel. The maximum height of the lens barrel P0 refers to the maximum distance from the object side end surface of the lens barrel P0 to the image side end surface of the lens barrel P0 in the optical axis direction.
Examples of specific surface patterns and parameters applicable to the optical lens system of the above embodiment are further described below with reference to the drawings.
In the following examples, the first state and the second state are present, and parameters such as a radius of curvature, a center thickness, and the like of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, and a distance between the lenses thereof, and a high order image coefficient of the optical lens system in the first state and the second state in the same example are the same, but the parameters such as the lens barrel P0, a maximum thickness of the thickness spacer of the spacer, an inner diameter of the spacer, and an outer diameter of the spacer, and a distance between the spacers are different, and a shape of a part of the lenses is different. Or the primary structure for imaging is the same, while the secondary structure for imaging is different.
It should be noted that any of the following examples one to three is applicable to all embodiments of the present application.
Example one
As shown in fig. 2 to 9, an optical lens system of example one of the present application is described. Fig. 2 shows a schematic configuration of the optical lens system of example one in a first state, fig. 3 shows a schematic configuration of the optical lens system of example one in a second state, and fig. 4 shows a schematic configuration of the optical lens system of example one in a third state.
As shown in fig. 2 and 4, the optical lens system includes, in order from an object side to an image side, a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a second auxiliary spacer P2b, a third lens element E3, a third spacer P3, a third auxiliary spacer P3b, a third auxiliary spacer P3c, a fourth lens element E4, a fourth spacer P4, and a fifth lens element E5. Two spacers are arranged between the second lens and the third lens, three spacers are arranged between the third lens and the fourth lens, and stray light is better intercepted and imaging quality is improved while powerful support is provided and enough bearing positions are ensured.
As shown in fig. 3, there is a second sub-auxiliary spacer P2c between the second lens and the third lens, against which the image-side surface portion of the second auxiliary spacer P2b is supported, to further intercept stray light.
In fig. 2 and 3, the spacers are located between two adjacent lenses, and each spacer is supported against a portion of the inner wall surface of the lens barrel P0, specifically, an inner wall surface parallel to the optical axis in the lens barrel P0, and the first lens E1 to the fifth lens E5 are disposed at intervals and are not directly supported against each other.
In fig. 4, the first lens and the second lens are buckled, and the first spacer is located at the inner side of the buckling structure, so that the assembling stability is improved.
As shown in fig. 2 to 4, the object side of the first lens element is S1, the image side of the first lens element is S2, the object side of the second lens element is S3, the image side of the second lens element is S4, the object side of the third lens element is S5, the image side of the third lens element is S6, the object side of the fourth lens element is S7, the image side of the fourth lens element is S8, the object side of the fifth lens element is S9, and the image side of the fifth lens element is S10.
Table 1 shows a basic structural parameter table of the optical lens system of example one, in which the unit of radius of curvature, thickness/distance, and effective focal length are all millimeter mm.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Refractive index | Abbe number | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | |||
| STO | Spherical surface sto | Infinity is provided | -0.8699 | |||
| S1 | Aspherical surface | 2.1285 | 1.2554 | 1.55 | 55.92 | 0.0033 |
| S2 | Aspherical surface | -19.6710 | 0.0300 | 1.5043 | ||
| S3 | Aspherical surface | 9.7595 | 0.2857 | 1.67 | 20.37 | 2.0278 |
| S4 | Aspherical surface | 3.4416 | 1.0674 | 0.5053 | ||
| S5 | Aspherical surface | -2.7274 | 0.3393 | 1.55 | 55.92 | -0.7125 |
| S6 | Aspherical surface | -6.0556 | 2.0016 | -15.3405 | ||
| S7 | Aspherical surface | -4.5184 | 0.5259 | 1.67 | 20.37 | -2.3629 |
| S8 | Aspherical surface | -7.1535 | 0.0489 | 6.1885 | ||
| S9 | Aspherical surface | -14.3180 | 0.4227 | 1.55 | 55.92 | 23.6567 |
| S10 | Aspherical surface | -13.5974 | 0.9231 | -94.8749 | ||
| S11 | Spherical surface | Infinity is provided | 0.1100 | 1.52 | 64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.4900 |
TABLE 1
In table 1, S11 is the object side surface of the filter, and S12 is the image side surface of the filter.
In the first example, the object side surface and the image side surface of any one of the first lens element E1 to the fifth lens element E5 are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c=1/R, i.e. paraxial curvature c is the reciprocal of the radius of curvature R in table 1 above; k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors S1-S10 in example one.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.6528E-02 | -8.7586E-03 | -3.1653E-03 | -1.2335E-03 | -4.3001E-04 | -1.4199E-04 | -2.6901E-05 |
| S2 | 2.7154E-02 | 1.0400E-02 | -9.8270E-03 | 3.9932E-03 | -1.7481E-03 | 8.9022E-04 | -4.8738E-04 |
| S3 | 1.1906E-02 | 2.9230E-02 | -1.0713E-02 | 3.4719E-03 | -1.0736E-03 | 6.2897E-04 | -3.0315E-04 |
| S4 | 6.5219E-02 | 2.5650E-02 | -4.1834E-04 | 6.1869E-04 | 3.6272E-05 | 8.5426E-05 | -5.3625E-06 |
| S5 | 3.1387E-01 | -1.5396E-02 | -2.7263E-04 | -1.5157E-04 | -3.2508E-05 | -2.7240E-06 | 2.6349E-07 |
| S6 | 3.2264E-01 | -5.5806E-03 | -5.9938E-04 | -1.6450E-04 | -8.2984E-05 | 6.0357E-06 | -3.9543E-06 |
| S7 | -2.0859E-01 | 4.4754E-02 | 4.7483E-02 | 8.4827E-03 | -9.2767E-03 | -4.5332E-03 | -8.0942E-04 |
| S8 | -6.2749E-01 | 2.1357E-01 | 1.0218E-02 | 3.7964E-02 | -1.3366E-02 | -6.1027E-03 | -8.9959E-03 |
| S9 | -7.8431E-01 | 3.6393E-01 | -7.0728E-02 | 3.5749E-02 | -1.5163E-02 | -2.1128E-03 | -5.1425E-03 |
| S10 | -7.2097E-01 | 8.5068E-02 | -1.6037E-02 | 1.6458E-02 | 3.9872E-03 | 1.0254E-03 | -8.3846E-04 |
| Face number | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -1.3506E-05 | 2.5248E-06 | -3.6767E-06 | 2.8193E-07 | 1.9283E-07 | 9.4010E-07 | -1.0848E-06 |
| S2 | 2.5161E-04 | -1.2355E-04 | 5.0523E-05 | -1.7891E-05 | 2.5461E-06 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.3695E-04 | -5.6483E-05 | 1.2128E-05 | -3.4258E-07 | -4.3660E-06 | 0.0000E+00 | 0.0000E+00 |
| S4 | 3.9848E-06 | -4.6382E-07 | -5.2883E-06 | -8.7573E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -2.0637E-06 | 5.7284E-06 | 1.1945E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -2.9503E-06 | -1.3012E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.1578E-03 | 7.0458E-04 | 2.7470E-04 | -3.0393E-04 | -7.8586E-06 | -2.1129E-05 | 4.4859E-05 |
| S8 | 3.5525E-03 | -1.4928E-03 | 4.4539E-03 | -1.9509E-03 | 5.3164E-04 | -3.3242E-04 | 4.6341E-05 |
| S9 | 6.3004E-03 | -3.3003E-03 | 3.9385E-03 | -3.9015E-03 | 1.8617E-03 | -5.0629E-04 | 9.6011E-05 |
| S10 | -4.1840E-04 | -9.0594E-04 | 2.4592E-04 | -3.0339E-04 | 1.9869E-04 | -5.5594E-05 | 2.8964E-05 |
TABLE 2
Fig. 5 shows an on-axis chromatic aberration curve of the optical lens system of example one, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens system. Fig. 6 shows an astigmatism curve of the optical lens system of example one, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 7 shows distortion curves of the optical lens system of example one, which represent distortion magnitude values corresponding to different angles of view. Fig. 8 shows a magnification chromatic aberration curve of the optical lens system of example one, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens system. Fig. 9 shows a relative illuminance curve of the optical lens system of example one, which represents relative illuminance magnitude values corresponding to different image heights.
As can be seen from fig. 5 to 9, the optical lens system according to example one can achieve good imaging quality.
Example two
As shown in fig. 10 to 17, an optical lens system of example two of the present application is described. Fig. 10 shows a schematic structural view of the optical lens system of the second example in the first state, fig. 11 shows a schematic structural view of the optical lens system of the second example in the second state, and fig. 12 shows a schematic structural view of the optical lens system of the second example in the third state. For brevity, a description of some parts similar to those of the example one will be omitted.
As shown in fig. 10 and 12, the optical lens system includes, in order from an object side to an image side, a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a second auxiliary spacer P2b, a third lens element E3, a third spacer P3, a third auxiliary spacer P3b, a third auxiliary spacer P3c, a fourth lens element E4, a fourth spacer P4, a fifth lens element E5, and a fifth spacer P5. Two spacers are arranged between the second lens and the third lens, three spacers are arranged between the third lens and the fourth lens, and stray light is better intercepted and imaging quality is improved while powerful support is provided and enough bearing positions are ensured. A fifth spacer P5 is disposed on the image side of the fifth lens in contact therewith to fix the fifth lens closest to the image side, improving structural stability of the optical lens system.
As shown in fig. 11, there is a second sub-auxiliary spacer P2c between the second lens and the third lens, against which the image side portion of the second auxiliary spacer P2b is supported, to further intercept stray light.
In fig. 10, the spacers are located between two adjacent lenses, and each spacer is supported against a portion of the inner wall surface of the lens barrel P0, specifically, an inner wall surface parallel to the optical axis in the lens barrel P0, and the first lens E1 to the fifth lens E5 are all disposed at intervals, and are not directly supported against each other.
In fig. 11 and 12, the first lens and the second lens are buckled, and the first spacer is located at the inner side of the buckling structure, so that the assembling stability is improved.
Table 3 shows a basic structural parameter table of the optical lens system of example two, in which the unit of radius of curvature, thickness/distance, effective focal length is millimeter mm.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Refractive index | Abbe number | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | |||
| STO | Spherical surface sto | Infinity is provided | -0.8727 | |||
| S1 | Aspherical surface | 2.1231 | 1.2801 | 1.55 | 55.92 | 0.0025 |
| S2 | Aspherical surface | -14.9114 | 0.0301 | -17.5587 | ||
| S3 | Aspherical surface | 9.5064 | 0.2670 | 1.67 | 20.37 | -3.1925 |
| S4 | Aspherical surface | 3.2270 | 1.0674 | -0.1609 | ||
| S5 | Aspherical surface | -3.2781 | 0.2500 | 1.55 | 55.92 | 0.5570 |
| S6 | Aspherical surface | -15.2636 | 1.8232 | 43.0437 | ||
| S7 | Aspherical surface | -8.8554 | 0.5500 | 1.67 | 20.37 | -5.3306 |
| S8 | Aspherical surface | -5.2559 | 0.0299 | 2.0554 | ||
| S9 | Aspherical surface | 10.1047 | 0.4200 | 1.55 | 55.92 | -99.0000 |
| S10 | Aspherical surface | 3.6678 | 1.1823 | -35.2809 | ||
| S11 | Spherical surface | Infinity is provided | 0.1100 | 1.52 | 64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.4900 |
TABLE 3 Table 3
Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces S1-S10 in example two, and the surface shape of each of the aspherical lenses can be defined by, but not limited to, equation (1) in example one.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.5853E-02 | -9.0145E-03 | -3.3449E-03 | -1.2121E-03 | -3.4947E-04 | -1.1444E-04 | -1.5462E-05 |
| S2 | 3.4084E-02 | 5.8086E-03 | -7.3808E-03 | 3.2734E-03 | -1.6347E-03 | 8.0385E-04 | -4.4090E-04 |
| S3 | 4.8550E-03 | 2.8063E-02 | -7.5271E-03 | 3.0468E-03 | -1.0068E-03 | 5.1319E-04 | -2.3007E-04 |
| S4 | 5.6592E-02 | 2.5676E-02 | 7.1041E-04 | 9.6237E-04 | 8.0837E-05 | 7.7400E-05 | -2.2735E-07 |
| S5 | 3.0403E-01 | -2.1521E-02 | 1.5698E-03 | -5.2263E-04 | 1.3550E-05 | -2.5746E-05 | -7.4166E-06 |
| S6 | 3.1802E-01 | -1.3326E-02 | 1.1272E-03 | -3.3357E-04 | -3.4927E-05 | -4.1580E-07 | -5.5096E-06 |
| S7 | -2.2493E-01 | 1.8641E-02 | 5.4897E-02 | 2.4272E-03 | -8.2058E-03 | -4.2727E-03 | 5.1211E-04 |
| S8 | -2.4294E-01 | 5.1137E-02 | 3.6970E-02 | 1.9287E-02 | -4.8961E-03 | -4.0821E-03 | -6.6494E-03 |
| S9 | -7.8746E-01 | 2.7749E-01 | -5.3022E-02 | 2.4627E-02 | -7.8276E-03 | 1.0002E-03 | -4.6949E-03 |
| S10 | -8.7808E-01 | 1.6701E-01 | -2.4262E-02 | 2.1204E-02 | -7.2844E-04 | -3.6077E-04 | -2.3772E-03 |
| Face number | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -1.1533E-05 | 3.0424E-06 | -3.5118E-06 | 7.0469E-07 | 1.6822E-07 | 1.8860E-06 | -1.3980E-06 |
| S2 | 2.0912E-04 | -1.1276E-04 | 4.1602E-05 | -1.9503E-05 | 3.5564E-06 | 0.0000E+00 | 0.0000E+00 |
| S3 | 9.6690E-05 | -3.7891E-05 | 5.4003E-06 | -9.9658E-07 | -4.7590E-06 | 0.0000E+00 | 0.0000E+00 |
| S4 | -5.3808E-07 | -2.6127E-07 | -4.6940E-06 | -1.2291E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -6.4900E-06 | 2.2377E-06 | -2.7519E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -3.8582E-06 | 1.1760E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.9873E-03 | 5.9477E-04 | -7.4236E-05 | -3.6708E-04 | 4.4395E-05 | 4.7023E-05 | 9.0943E-06 |
| S8 | 2.7875E-03 | -1.3432E-03 | 2.5009E-03 | -1.2007E-03 | 4.3417E-04 | -1.3816E-04 | 6.0205E-06 |
| S9 | 4.7346E-03 | -3.0607E-03 | 2.5916E-03 | -2.0604E-03 | 1.0202E-03 | -2.6743E-04 | 2.6218E-05 |
| S10 | -4.9791E-04 | -9.7617E-04 | 2.7880E-04 | -3.1612E-04 | 2.0276E-04 | -3.4467E-05 | 4.5656E-05 |
TABLE 4 Table 4
Fig. 13 shows an on-axis chromatic aberration curve of the optical lens system of example two, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens system. Fig. 14 shows an astigmatism curve of the optical lens system of example two, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 15 shows a distortion curve of the optical lens system of example two, which represents distortion magnitude values corresponding to different angles of view. Fig. 16 shows a magnification chromatic aberration curve of the optical lens system of example two, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens system. Fig. 17 shows a relative illuminance curve of the optical lens system of example two, which represents relative illuminance magnitude values corresponding to different image heights.
As can be seen from fig. 13 to 17, the optical lens system of example two can achieve good imaging quality.
Example three
As shown in fig. 18 to 25, an optical lens system of example three of the present application is described. Fig. 18 shows a schematic structural view of the optical lens system of the third example in the first state, fig. 19 shows a schematic structural view of the optical lens system of the third example in the second state, and fig. 20 shows a schematic structural view of the optical lens system of the third example in the third state. For brevity, a description of some parts similar to those of the example one will be omitted.
As shown in fig. 18, the optical lens system includes, in order from an object side to an image side, a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a second auxiliary spacer P2b, a third lens element E3, a third spacer P3, a third auxiliary spacer P3b, a third auxiliary spacer P3c, a fourth lens element E4, a fourth spacer P4, and a fifth lens element E5. Two spacers are arranged between the second lens and the third lens, three spacers are arranged between the third lens and the fourth lens, and stray light is better intercepted and imaging quality is improved while powerful support is provided and enough bearing positions are ensured.
As shown in fig. 19, unlike fig. 18, the second sub-mount P2c is provided on the image side of the second sub-mount P2b, and only the third mount P3 and the third sub-mount P3b are provided between the third lens and the fourth lens.
As shown in fig. 20, the difference from fig. 18 is that only the third separator P3 and the third auxiliary separator P3b are provided between the third lens and the fourth lens.
In fig. 18, the spacers are located between two adjacent lenses, and each spacer is supported against a portion of the inner wall surface of the lens barrel P0, specifically, an inner wall surface parallel to the optical axis in the lens barrel P0, and the first lens E1 to the fifth lens E5 are disposed at intervals and are not directly supported against each other.
In fig. 19 and 20, the first lens and the second lens are buckled, and the first spacer is located at the inner side of the buckling structure, so that the assembling stability is improved.
Table 5 shows a basic structural parameter table of the optical lens system of example three, in which the unit of radius of curvature, thickness/distance, effective focal length is millimeter mm.
TABLE 5
Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces S1-S10 in example three, and the surface shape of each of the aspherical lenses can be defined by, but not limited to, equation (1) in example one.
TABLE 6
Fig. 21 shows an on-axis chromatic aberration curve of the optical lens system of example three, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens system. Fig. 22 shows an astigmatism curve of the optical lens system of example three, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 23 shows a distortion curve of the optical lens system of example three, which represents distortion magnitude values corresponding to different angles of view. Fig. 24 shows a magnification chromatic aberration curve of the optical lens system of example three, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens system. Fig. 25 shows a relative illuminance curve of the optical lens system of example three, which represents relative illuminance magnitude values corresponding to different image heights.
As can be seen from fig. 21 to 25, the optical lens system given in example three can achieve good imaging quality.
In summary, examples one to three satisfy the relationships shown in table 7, respectively.
TABLE 7
Table 8 gives the partial parameters of the optical lens systems of examples one to three.
| Basic data/examples | 1-1 | 1-2 | 1-3 | 2-1 | 2-2 | 2-3 | 3-1 | 3-2 | 3-3 |
| d1s | 3.0134 | 3.0381 | 3.0954 | 3.0134 | 3.1106 | 3.0724 | 3.0134 | 3.0736 | 3.0736 |
| D1s | 4.9600 | 5.0600 | 3.9607 | 4.9600 | 3.9760 | 3.9760 | 4.9600 | 4.0127 | 4.0127 |
| d2s | 2.4774 | 2.5202 | 2.5202 | 2.5146 | 2.5146 | 2.5146 | 2.5146 | 2.5271 | 2.5146 |
| D2m | 5.0400 | 5.1400 | 4.9400 | 5.0400 | 5.0400 | 5.0400 | 5.0400 | 4.9800 | 5.0400 |
| d3s | 2.5845 | 2.6253 | 2.6253 | 2.5845 | 2.5845 | 2.5845 | 2.5845 | 2.5714 | 2.5845 |
| D3s | 5.2600 | 5.3600 | 5.1600 | 5.2600 | 5.2600 | 5.2600 | 5.2600 | 5.2000 | 5.2600 |
| d4s | 4.4057 | 4.3899 | 4.4215 | 4.4063 | 4.3697 | 4.4063 | 4.3940 | 4.3940 | 4.3940 |
| d4m | 4.4057 | 4.3899 | 4.4215 | 4.4063 | 4.3697 | 4.4063 | 4.3940 | 4.3940 | 4.3940 |
| D4s | 5.7800 | 5.8800 | 5.8800 | 5.8355 | 5.9355 | 5.8355 | 5.8355 | 5.7755 | 5.8355 |
| D4m | 5.7800 | 5.8800 | 5.8800 | 5.8355 | 5.9355 | 5.8355 | 5.8355 | 5.7755 | 5.8355 |
| d0s | 4.9801 | 4.9801 | 4.9801 | 4.9801 | 4.9801 | 4.9801 | 4.9801 | 4.9801 | 4.9801 |
| D0s | 5.6062 | 5.7262 | 5.7262 | 5.6062 | 5.8062 | 5.8062 | 5.6062 | 5.6062 | 5.6062 |
| D0m | 6.7600 | 6.8800 | 6.8800 | 6.7600 | 6.7600 | 6.7600 | 6.7600 | 6.7600 | 6.7600 |
| EP01 | 1.3800 | 1.3600 | 1.3143 | 1.3760 | 1.3065 | 1.3365 | 1.3760 | 1.3258 | 1.3258 |
| EP12 | 0.5600 | 0.5780 | 0.6217 | 0.5600 | 0.6295 | 0.5995 | 0.5400 | 0.5902 | 0.5902 |
| CP2 | 0.0220 | 0.0220 | 0.0220 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 |
| EP23 | 1.2800 | 1.3100 | 1.3100 | 1.1922 | 1.1922 | 1.1922 | 1.2695 | 1.2705 | 1.2705 |
| CP3 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 | 0.0300 |
| EP34 | 1.4375 | 1.3975 | 1.4195 | 1.5073 | 1.4773 | 1.5073 | 1.3602 | 1.3602 | 1.3602 |
| CP4 | 0.0220 | 0.0220 | 0.0220 | 0.0220 | 0.0220 | 0.0220 | 0.0220 | 0.0220 | 0.0220 |
| L | 6.5000 | 6.5000 | 6.3700 | 6.5000 | 6.5000 | 6.5000 | 6.5000 | 6.3500 | 6.3116 |
| d2bm | 3.9266 | 3.8810 | 4.0266 | 3.9266 | 3.9266 | 3.9266 | 3.9266 | 3.7797 | 3.9797 |
| D2bm | 4.7783 | 4.9152 | 4.6783 | 4.7917 | 4.7917 | 4.7917 | 4.6939 | 4.7345 | 4.6939 |
| CP2b | 0.6500 | 0.5780 | 0.6000 | 0.6420 | 0.5820 | 0.6420 | 0.7203 | 0.6603 | 0.7203 |
| d3bs | 4.1783 | 3.4977 | 3.2444 | 3.5140 | 3.0837 | 3.5140 | 3.5140 | 3.5140 | 3.5140 |
| D3bm | 5.2784 | 5.3784 | 5.1784 | 5.2784 | 5.2784 | 5.2784 | 5.2784 | 5.2392 | 5.2992 |
TABLE 8
It should be noted that, in tables 7 and 8, 1-1 represents the first state of the optical lens system in example one, 1-2 represents the second state of the optical lens system in example one, 1-3 represents the third state of the optical lens system in example one, 2-1 represents the first state of the optical lens system in example two, 2-2 represents the second state of the optical lens system in example two, 2-3 represents the third state of the optical lens system in example two, 3-1 represents the first state of the optical lens system in example three, 3-2 represents the second state of the optical lens system in example three, and 3-3 represents the third state of the optical lens system in example three.
Table 9 gives the effective focal lengths f1 to f5 of the first lens to the fifth lens of the optical lens systems of examples one to three, and the effective focal length f of the optical lens system, half of the maximum field angle Semi-FOV.
| Basic data/examples | 1 | 2 | 3 |
| Semi-FOV | 18.1967 | 17.6334 | 17.8980 |
| f(mm) | 8.6700 | 8.6700 | 8.6700 |
| f1(mm) | 3.5928 | 3.4986 | 3.4988 |
| f2(mm) | -8.1233 | -7.4565 | -7.2799 |
| f3(mm) | -9.4337 | -7.7070 | -7.8712 |
| f4(mm) | -20.0000 | 18.2821 | 9.3721 |
| f5(mm) | 410.1675 | -10.8002 | -7.1791 |
| f345(mm) | -6.2279 | -5.5111 | -5.9032 |
TABLE 9
The present application also provides an imaging device, the electron-sensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical lens system described above.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (18)
1. An optical lens system, comprising:
five lenses, including first to fifth lenses in order from an object side to an image side of the optical lens system;
a plurality of spacers, wherein the spacers at least comprise a fourth spacer which is positioned on the image side of the fourth lens and is contacted with the image side of the fourth lens;
A lens barrel for accommodating the lens and the spacer;
the abbe number V4 of the fourth lens and the abbe number V5 of the fifth lens satisfy: -40< V4-V5< -30;
the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter D4s of the object side surface of the fourth spacer and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following conditions: -1< (D4 s x D4 m)/(f 4-f 5) <3;
the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the center thickness CT5 of the fifth lens satisfy: -40< (r7+r8)/(CP 4+t45+ct 5) < -18.
2. The optical lens system according to claim 1, wherein an effective focal length f4 of the fourth lens, an inner diameter d4m of an image side surface of the fourth spacer, a refractive index N4 of the fourth lens, and a refractive index N5 of the fifth lens satisfy: 2< |f4/d4m| (n4+n5) <18.
3. The optical lens system according to claim 1, wherein at least a third spacer positioned on and in contact with an image side of a third lens is included in the plurality of spacers, an effective focal length f3 of the third lens, an inner diameter d4s of an object side of the fourth spacer, an inner diameter d3s of the object side of the third spacer, and a distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis satisfy: 16mm < f3 x (d 4s-d3 s)/EP 34< -7mm.
4. The optical lens system according to claim 1, wherein a radius of curvature R9 of the object side surface of the fifth lens, a radius of curvature R10 of the image side surface of the fifth lens, an outer diameter D0m of the image side end surface of the lens barrel, and an inner diameter D4m of the image side surface of the fourth spacer satisfy: -1.5< (d0m+d4m)/(r9+r10) <16.
5. The optical lens system according to claim 1, wherein at least a second spacer located on and in contact with an image side of a second lens, a third spacer located on and in contact with an image side of a third lens, an effective focal length f2 of the second lens, a distance EP23 from the image side of the second spacer to an object side of the third spacer along the optical axis, an air interval T23 on the optical axis between the second lens and the third lens satisfy: -65< f 2/(EP 23-T23) < -28.
6. The optical lens system according to claim 1, wherein at least a third spacer which is located on and in contact with an image side of a third lens is included in the plurality of spacers, and a radius of curvature R6 of the image side of the third lens, an outer diameter D3s of an object side of the third spacer, and an inner diameter D3s of the object side of the third spacer satisfy: -2.5< (d3s+d3s)/R6 <1.5.
7. The optical lens system according to claim 1, wherein the plurality of spacers includes at least a second spacer which is located on and in contact with an image side of a second lens, and a radius of curvature R5 of an object side of a third lens, a radius of curvature R4 of an image side of the second lens, an outer diameter D2m of an image side of the second spacer, and an inner diameter D2s of an object side of the second spacer satisfy: -7< (R5-R4)/(D2 m-D2 s) <0.
8. The optical lens system according to claim 1, wherein the plurality of spacers includes at least a first spacer that is located on and in contact with an image side of the first lens, and an effective focal length f1 of the first lens, an outer diameter D0s of an object side end surface of the lens barrel, an inner diameter D0s of the object side end surface of the lens barrel, and a distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis satisfy: 22mm < f1 x (d0s+d0s)/EP 01<33mm.
9. The optical lens system according to claim 1, wherein at least a third spacer positioned on and in contact with an image side of a third lens is included in the plurality of spacers, a combined focal length f345 of the third lens, the fourth lens, and the fifth lens, a distance EP34 from the image side of the third spacer to an object side of the fourth spacer along the optical axis, a thickness CP3 of the third spacer, a thickness CP4 of the fourth spacer, and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: -7< f 345/(EP 34-CP3-CP 4-T45) <0.
10. The optical lens system according to any one of claims 1 to 9, wherein the plurality of spacers includes at least a first spacer located on the image side of the first lens and in contact with the image side of the first lens, a second spacer located on the image side of the second lens and in contact with the image side of the second lens, a third spacer located on the image side of the third lens and in contact with the image side of the third lens, the abbe number V1 of the first lens, the inner diameter d1s of the object side of the first spacer, the abbe number V2 of the second lens, the inner diameter d2s of the object side of the second spacer, the abbe number V3 of the third lens, the inner diameter d3s of the object side of the third spacer, the distance EP23 of the image side of the second spacer to the object side of the third spacer along the optical axis, the distance EP12 of the image side of the first spacer to the object side of the second spacer satisfying therebetween: 23< (V1/d1s+V2/d2s+V3/d 3 s) (EP 23-EP 12) <38.
11. The optical lens system according to any one of claims 1 to 9, wherein at least a first spacer located on and in contact with an image side of the first lens is included in the plurality of spacers, and a radius of curvature R1 of an object side of the first lens, a radius of curvature R2 of an image side of the second lens, an outer diameter D1s of the object side of the first spacer, and an inner diameter D1s of the object side of the first spacer satisfy: -25< (r1+r2)/(D1 s-D1 s) <0.
12. The optical lens system according to any one of claims 1 to 9, wherein at least a second spacer that is positioned on and in contact with an image side of a second lens, a second auxiliary spacer that is in contact with an image side portion of the second spacer, and a radius of curvature R5 of an object side of a third lens, an outer diameter D2bm of an image side of the second auxiliary spacer, and an inner diameter D2bm of an image side of the second auxiliary spacer satisfy: -14< r 5/(D2 bm-D2 bm) <0; the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer satisfy: -35< (f2+f3)/(CP 2+cp2 b) < -15.
13. The optical lens system according to any one of claims 1 to 9, wherein the plurality of spacers includes at least a third spacer that is located on and in contact with an image side of a third lens, a third auxiliary spacer that is in partial contact with the image side of the third spacer, an outer diameter D3bm of the image side of the third auxiliary spacer, an inner diameter D3bs of the object side of the third auxiliary spacer, a radius of curvature R5 of the object side of the third lens, and a radius of curvature R7 of the object side of the fourth lens, satisfying: 0< (D3bm+d3bs)/(R5-R7) <7.
14. The optical lens system according to any one of claims 1 to 9, wherein the plurality of spacers includes at least a first spacer located on and in contact with an image side of the first lens, a second spacer located on and in contact with an image side of a second lens, and a third spacer located on and in contact with an image side of a third lens, an inner diameter d1s of an object side of the first spacer, and an inner diameter d2s of an object side of the second spacer satisfy: d1s/d2s >1; the inner diameter d3s of the object side surface of the third separator and the inner diameter d4s of the object side surface of the fourth separator satisfy the following conditions: d3s/d4s <1.
15. The optical lens system according to any one of claims 1 to 9, wherein a plurality of the spacers includes at least a third spacer located on an image side of a third lens and in contact with the image side of the third lens, an air space between the third lens and the fourth lens on the optical axis is largest among air spaces between all adjacent two of the lenses on the optical axis, an effective focal length f3 of the third lens, an effective focal length f4 of the fourth lens, a distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0< |f3-f4|/(EP 34-CT3+T34-CT 4) <15.
16. The optical lens system according to any one of claims 1 to 9, wherein the plurality of spacers includes at least a third spacer that is located on an image side of a third lens and is in contact with an image side surface of the third lens, a third auxiliary spacer that is in contact with an image side surface portion of the third spacer, and a third auxiliary spacer that is in bearing contact with an image side surface portion of the third auxiliary spacer.
17. The optical lens system according to any one of claims 1 to 9, wherein at least a second spacer which is located on an image side of a second lens and is in contact with an image side surface of the second lens, a second auxiliary spacer which is in contact with an image side surface portion of the second spacer, and a second auxiliary spacer which is in bearing contact with an image side surface portion of the second auxiliary spacer are included in the plurality of spacers.
18. The optical lens system according to any one of claims 1 to 9, wherein a distance Yc51 between a critical point of an object side surface of the fifth lens and the optical axis, and a distance Yc41 between a critical point of an object side surface of the fourth lens and the optical axis are satisfied by an outer diameter D4s of the object side surface of the fourth spacer, an inner diameter D4m of an image side surface of the fourth spacer: 5< (D4 s-D4 m)/(Yc 51-Yc 41) <36; an inner diameter d4m of the image side surface of the fourth spacer, a critical point of the object side surface of the fifth lens, and a perpendicular distance Yc51 of the optical axis satisfy: 0< d4m/Yc51<7.
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| CN202321596594.8U CN220381364U (en) | 2023-06-20 | 2023-06-20 | Optical lens system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321596594.8U CN220381364U (en) | 2023-06-20 | 2023-06-20 | Optical lens system |
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| CN220381364U true CN220381364U (en) | 2024-01-23 |
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