CN211123446U - Optical imaging system - Google Patents

Optical imaging system Download PDF

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CN211123446U
CN211123446U CN201921676966.1U CN201921676966U CN211123446U CN 211123446 U CN211123446 U CN 211123446U CN 201921676966 U CN201921676966 U CN 201921676966U CN 211123446 U CN211123446 U CN 211123446U
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lens
imaging system
optical imaging
optical
image
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CN201921676966.1U
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王晓芳
徐标
张凯元
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The application discloses an optical imaging system which comprises a first lens with negative focal power, a second lens with focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with focal power, a sixth lens with focal power, an aspheric surface with non-rotational symmetry on at least one mirror surface from the object side surface of the first lens to the image side surface of the sixth lens, and a distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging system on the optical axis and a half ImgH of the diagonal length of an effective pixel area on the imaging surface satisfy TT L/ImgH < 1.6.

Description

Optical imaging system
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging system.
Background
In recent years, with the development of scientific technology, the market demand for optical imaging systems suitable for portable electronic products has been increasing. In addition, people have higher and higher requirements on the imaging quality of electronic products, so that the optical imaging system is continuously upgraded and updated. As portable electronic products are generally smaller, the optical imaging system mounted thereon is moving toward miniaturization and lightness. The development direction of the optical imaging system is limited in the total optical length, and the design and manufacturing difficulty of the optical imaging system is increased.
The wide-angle optical system has large optical distortion and TV distortion, and the obtained image has serious distortion. The increased design difficulty makes correction of these distortions more difficult, as well as off-axis and sagittal aberrations.
In order to meet the miniaturization demand and meet the imaging requirement, an optical imaging system that can achieve both miniaturization and a large angle of view, low distortion, and low aberration is required.
SUMMERY OF THE UTILITY MODEL
The present application provides an optical imaging system, in order from an object side to an image side along an optical axis, comprising: a first lens having an optical power; a second lens having an optical power; a third lens having optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power. At least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is a non-rotationally symmetric aspheric surface.
In one embodiment, an optical imaging system includes a first lens having a negative optical power.
In one embodiment, the optical imaging system includes a third lens having a positive optical power.
In one embodiment, the object side surface of the first lens element can be concave and the image side surface can be concave; the object side surface of the second lens can be a convex surface, and the image side surface can be a concave surface; the object-side surface of the third lens element can be convex, and the image-side surface can be convex.
In one embodiment, the object side surface of the fourth lens may be concave; the fifth lens has positive focal power, and the image side surface of the fifth lens can be a convex surface; the sixth lens element has negative power, and has a convex object-side surface and a concave image-side surface.
In one embodiment, a distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging system on the optical axis and a half ImgH of a diagonal length of the effective pixel area on the imaging surface may satisfy TT L/ImgH < 1.6.
In one embodiment, a central thickness CT5 of the fifth lens on the optical axis and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy 0.5 < T56/CT5 < 1.
In one embodiment, the effective focal length fx of the optical imaging system in the X-axis direction and the effective focal length f3 of the third lens may satisfy 0.5 < fx/f3 < 1.5.
In one embodiment, the effective focal length fy in the Y-axis direction of the optical imaging system and the effective focal length f1 of the first lens may satisfy-0.7 < fy/f1 < -0.2.
In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens can satisfy-0.8 < f5/f6 < -0.3.
In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side surface of the first lens may satisfy 0.5 < R1/f1 < 1.5.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy 0.5 < R4/R3 < 1.5.
In one embodiment, an effective focal length f3 of the third lens, a radius of curvature R5 of an object-side surface of the third lens, and a radius of curvature R6 of an image-side surface of the third lens may satisfy 0.3 < f3/(R5-R6) < 0.8.
In one embodiment, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R10 of the image-side surface of the fifth lens may satisfy 0.1 < R10/R7 < 0.6.
In one embodiment, a radius of curvature R10 of the image-side surface of the fifth lens element and a radius of curvature R11 of the object-side surface of the sixth lens element may satisfy 0.3 < R11/(R11-R10) < 0.8.
In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, and a central thickness CT4 of the fourth lens on the optical axis may satisfy 0.7 < (CT1+ CT2)/(CT3+ CT4) < 1.2.
In one embodiment, a sum Σ AT of separation distances on the optical axis between any two adjacent lenses of the first to sixth lenses and a center thickness CT6 of the sixth lens on the optical axis may satisfy 0.2 < CT6/Σ AT < 0.7.
In one embodiment, an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, SAG41, and an on-axis distance from an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens, SAG61 may satisfy 0.5 < SAG41/SAG61 < 1.0.
In one embodiment, the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens may satisfy 0.5 < DT41/DT21 < 1.0.
In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT62 of the image-side surface of the sixth lens may satisfy 0.2 < DT11/DT62 < 0.7.
The optical imaging system has the advantages that the six lenses are adopted, the focal power, the surface type and the center thickness of each lens and the on-axis distance between the lenses are reasonably distributed, and the optical imaging system has at least one beneficial effect of large visual angle, low aberration, miniaturization and the like.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging system according to embodiment 1 of the present application;
FIG. 2 schematically illustrates the case where the RMS spot diameter of the optical imaging system of embodiment 1 is in the first quadrant;
fig. 3 shows a schematic configuration diagram of an optical imaging system according to embodiment 2 of the present application;
FIG. 4 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of embodiment 2;
fig. 5 shows a schematic configuration diagram of an optical imaging system according to embodiment 3 of the present application;
FIG. 6 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of embodiment 3;
fig. 7 shows a schematic configuration diagram of an optical imaging system according to embodiment 4 of the present application;
FIG. 8 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of example 4;
fig. 9 shows a schematic configuration diagram of an optical imaging system according to embodiment 5 of the present application;
FIG. 10 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of example 5;
fig. 11 shows a schematic configuration diagram of an optical imaging system according to embodiment 6 of the present application;
FIG. 12 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of example 6;
fig. 13 is a schematic structural view showing an optical imaging system according to embodiment 7 of the present application;
FIG. 14 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of example 7;
fig. 15 shows a schematic configuration diagram of an optical imaging system according to embodiment 8 of the present application;
FIG. 16 schematically illustrates the RMS spot diameter in the first quadrant for the optical imaging system of example 8;
fig. 17 is a schematic structural view showing an optical imaging system according to embodiment 9 of the present application;
fig. 18 schematically shows the case where the RMS spot diameter of the optical imaging system of example 9 is in the first quadrant.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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 surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
In this document, we define a direction parallel to the optical axis as a Z-axis direction, a direction perpendicular to the Z-axis and lying in a meridional plane as a Y-axis direction, and a direction perpendicular to the Z-axis and lying in a sagittal plane as an X-axis direction. Unless otherwise specified, each parameter symbol (e.g., radius of curvature, etc.) other than the parameter symbol relating to the field of view herein denotes a characteristic parameter value in the Y-axis direction of the imaging lens group. For example, without being particularly described, fx denotes a radius of curvature in the X-axis direction of the optical imaging system, and fy denotes a radius of curvature in the Y-axis direction of the optical imaging system.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging system according to an exemplary embodiment of the present application may include, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order from the object side to the image side along the optical axis. Any adjacent two lenses among the first to sixth lenses may have an air space therebetween.
In an exemplary embodiment, the first lens may have a negative power.
In an exemplary embodiment, the object side surface of the first lens may be concave, and the image side surface may be concave; the object-side surface of the second lens element can be convex, and the image-side surface can be concave.
In an exemplary embodiment, the third lens may have a positive optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be convex; the fourth lens can have negative focal power, and the object side surface of the fourth lens can be a concave surface; the fifth lens can have positive focal power, and the image side surface of the fifth lens can be a convex surface; the sixth lens element can have a negative power, and can have a convex object-side surface and a concave image-side surface. By reasonably controlling the positive and negative distribution of the focal power of each component of the system and the lens surface curvature, the low-order aberration of the control system can be effectively balanced, the sensitivity of the optical imaging system to tolerance is favorably reduced, the resolving power is improved, and the optical imaging system has the characteristic of miniaturization.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
In an exemplary embodiment, an object-side surface or an image-side surface of at least one of the first lens to the sixth lens is a non-rotationally symmetric aspherical surface. The non-rotationally symmetric aspheric surface is added with a non-rotationally symmetric component on the basis of the rotationally symmetric aspheric surface, and the non-rotationally symmetric aspheric mirror surface is favorable for reducing optical distortion and TV distortion, correcting off-axis meridional aberration and sagittal aberration of the optical imaging system and improving the imaging quality of the optical imaging system.
In an exemplary embodiment, the optical imaging system of the present application may satisfy a conditional expression TT L/ImgH < 1.6, where TT L is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging system, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, and more particularly, TT L and ImgH may satisfy TT L/ImgH < 1.59.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < T56/CT5 < 1, where CT5 is a center thickness of the fifth lens on the optical axis and T56 is a separation distance of the fifth lens and the sixth lens on the optical axis. More specifically, CT5 and T56 satisfy 0.55 < T56/CT5 < 0.95. The distance between the fifth lens and the sixth lens is matched with the center thickness of the fifth lens, so that the field curvature of the optical imaging system can be controlled conveniently, and the imaging quality of the optical imaging system is improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < fx/f3 < 1.5, fx being an effective focal length in the X-axis direction of the optical imaging system, and f3 being an effective focal length of the third lens. More specifically, fx and f3 satisfy 0.8 < fx/f3 < 1.2. By controlling the ratio of the effective focal length of the optical imaging system in the X-axis direction to the effective focal length of the third lens, the focal power of the third lens can be controlled, the spherical aberration generated by the lens in the image side direction of the third lens can be balanced, and the optical imaging system has good image quality.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression-0.7 < fy/f1 < -0.2, where fy is an effective focal length in the Y-axis direction of the optical imaging system, and f1 is an effective focal length of the first lens. More specifically, fy and f1 can satisfy-0.50 < fy/f1 < -0.35. By controlling the ratio of the effective focal length of the optical imaging system in the Y-axis direction to the effective focal length of the first lens, the focal power of the first lens can be controlled, the spherical aberration generated by the lens in the image side direction of the first lens can be effectively balanced, and the optical imaging system has good image quality.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression-0.8 < f5/f6 < -0.3, where f5 is an effective focal length of the fifth lens and f6 is an effective focal length of the sixth lens. More specifically, f5 and f6 satisfy-0.75 < f5/f6 < -0.45. By controlling the effective focal length ratio of the fifth lens and the sixth lens, the spherical aberration generated by the two lenses is favorably balanced, the residual spherical aberration between the fifth lens and the sixth lens in the object side direction of the fifth lens is favorably balanced by the lens in the object side direction of the fifth lens with smaller load, and the optical imaging system is favorably enabled to easily maintain the image quality near the on-axis field of view. The imaging quality of the optical imaging system is stable and reliable.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < R1/f1 < 1.5, where f1 is an effective focal length of the first lens and R1 is a radius of curvature of an object side surface of the first lens. More specifically, f1 and R1 may satisfy 0.6 < R1/f1 < 0.8. The shape of the first lens can be controlled by controlling the ratio of the curvature radius of the object side surface of the first lens to the effective focal length of the first lens, so that the fifth-order spherical aberration generated by the object side surface of the first lens can be controlled, and the contribution rate of the first lens to the fifth-order spherical aberration of the optical imaging system can be controlled.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < R4/R3 < 1.5, where R3 is a radius of curvature of an object-side surface of the second lens and R4 is a radius of curvature of an image-side surface of the second lens. More specifically, R3 and R4 satisfy 0.8 < R4/R3 < 1.2. The ratio of the curvature radius of the object side surface of the second lens to the curvature radius of the image side surface of the second lens is controlled, so that the thickness of the second lens at different positions from the optical axis can be controlled, the second lens with the appropriate thickness ratio can have better processability, and in addition, the trend of marginal rays can be controlled, and the sensitivity of the second lens is further reduced.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.3 < f3/(R5-R6) < 0.8, where f3 is an effective focal length of the third lens, R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. More specifically, f3, R5 and R6 may satisfy 0.4 < f3/(R5-R6) < 0.5. By matching the effective focal length of the third lens, the curvature radius of the object side surface and the curvature radius of the image side surface, the high-grade spherical aberration contributed by the third lens can be favorably controlled, and the optical imaging system has good imaging quality.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.1 < R10/R7 < 0.6, where R7 is a radius of curvature of an object-side surface of the fourth lens and R10 is a radius of curvature of an image-side surface of the fifth lens. More specifically, R7 and R10 may satisfy 0.15 < R10/R7 < 0.55. The ratio of the curvature radius of the object side surface of the fifth lens to the curvature radius of the image side surface of the fourth lens is controlled, so that the aberration of the optical imaging system is balanced, and the imaging quality of the optical imaging system is improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.3 < R11/(R11-R10) < 0.8, where R10 is a radius of curvature of an image-side surface of the fifth lens and R11 is a radius of curvature of an object-side surface of the sixth lens. More specifically, R10 and R11 may satisfy 0.52 < R11/(R11-R10) < 0.62. The curvature radius of the image side surface of the fifth lens is matched with the curvature radius of the object side surface of the sixth lens, so that aberration generated by the fifth lens and the sixth lens is favorably controlled, and the optical imaging system has better imaging quality.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.7 < (CT1+ CT2)/(CT3+ CT4) < 1.2, where CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, and CT4 is a central thickness of the fourth lens on the optical axis. More specifically, CT1, CT2, CT3 and CT4 may satisfy 0.75 < (CT1+ CT2)/(CT3+ CT4) < 1.05. By matching the central thicknesses of the four lenses, namely the first lens and the fourth lens, the thicknesses of the lenses are balanced, the processability of each lens is improved, the optical imaging system is compact, and the miniaturization of the optical imaging system is facilitated.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < CT6/Σ AT < 0.7, where Σ AT is a sum of separation distances on the optical axis between any two adjacent lenses of the first to sixth lenses, and exemplarily, Σ AT is T12+ T23+ T34+ T45+ T56, where T56 is a separation distance on the optical axis between the fifth lens and the sixth lens, and T12 to T45 are separation distances corresponding to the adjacent lenses as described above. CT6 is the center thickness of the sixth lens on the optical axis. More specifically, Σ AT and CT6 may satisfy 0.3 < CT6/Σ AT < 0.5. The ratio of the center thickness of the sixth lens to the sum of the lens intervals is controlled, so that the center thickness of the sixth lens is controlled, the sixth lens has good processability, the contribution rate of the sixth lens to the distortion of the optical imaging system is reduced, and the optical imaging system has good distortion performance.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < SAG41/SAG61 < 1.0, where SAG41 is an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, and SAG61 is an on-axis distance from an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens. More specifically, SAG41 and SAG61 may satisfy 0.65 < SAG41/SAG61 < 0.90. By controlling the ratio of the object side rise of the fourth lens to the object side rise of the sixth lens, the incident angles of the light rays on the object side of the fourth lens and the object side of the sixth lens can be effectively controlled, and the matching degree of the optical imaging system and the chip is further improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < DT41/DT21 < 1.0, where DT21 is the maximum effective radius of the object-side surface of the second lens and DT41 is the maximum effective radius of the object-side surface of the fourth lens. More specifically, DT21 and DT41 satisfy 0.80 < DT41/DT21 < 0.95. The aperture ratio of the object side surface of the second lens and the aperture ratio of the object side surface of the fourth lens are controlled, on one hand, the aperture of the fourth lens is controlled, the size of the fourth lens is reduced, the optical imaging system has the light and thin characteristic, on the other hand, the range of incident light is limited, light with poor quality at the edge area is eliminated, and then off-axis aberration is reduced, so that the resolving power of the optical imaging system is effectively improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < DT11/DT62 < 0.7, where DT11 is the maximum effective radius of the object-side surface of the first lens and DT62 is the maximum effective radius of the image-side surface of the sixth lens. More specifically, DT11 and DT62 may satisfy 0.45 < DT11/DT62 < 0.58. By controlling the aperture ratio of the object side surface of the first lens to the image side surface of the sixth lens, the volume of the portion of the optical imaging system facing the object side can be effectively reduced, and the optical imaging system can be miniaturized. And further, the optical imaging system has better installation characteristics and can be better suitable for equipment such as a full-screen mobile phone.
In an exemplary embodiment, the optical imaging system may further include at least one diaphragm. The diaphragm may be disposed at an appropriate position as needed, for example, between the second lens and the third lens. Optionally, the optical imaging system may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the imaging surface.
The optical imaging system according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the imaging system can be effectively reduced, the sensitivity of the imaging system can be reduced, and the processability of the imaging system can be improved, so that the optical imaging system is more favorable for production and processing and can be suitable for portable electronic products. Meanwhile, the optical imaging system of the application also has the characteristics of miniaturization and excellent optical performance such as large visual angle, low aberration and low distortion.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging system may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging system is not limited to including six lenses. The optical imaging system may also include other numbers of lenses, if desired.
Specific examples of the optical imaging system that can be applied to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging system according to embodiment 1 of the present application is described below with reference to fig. 1 to 2. Fig. 1 shows a schematic configuration diagram of an optical imaging system according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
Table 1 shows a basic parameter table of the optical imaging system of embodiment 1, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm).
Figure DEST_PATH_GDA0002269316800000071
TABLE 1
In embodiment 1, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.88mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.88mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.10mm, the value of half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 49.6 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 are both rotationally symmetric aspheric surfaces, and the surface shape x of each rotationally symmetric aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure DEST_PATH_GDA0002269316800000072
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S10 in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Figure DEST_PATH_GDA0002269316800000073
Figure DEST_PATH_GDA0002269316800000081
TABLE 2
As can be further seen from table 1, the object-side surface S11 and the image-side surface S12 of the sixth lens element E6 are non-rotationally symmetric aspheric surfaces (i.e., AAS surfaces), and the surface type of the non-rotationally symmetric aspheric surfaces can be defined by, but not limited to, the following non-rotationally symmetric aspheric surface formula:
Figure DEST_PATH_GDA0002269316800000082
wherein Z is a rise of a plane parallel to the Z-axis direction; cx、CyX, Y (curvature is the reciprocal of curvature radius) of the apex of the axial surface; kx、KyX, Y axial conic coefficients, respectively; AR, BR, CR, DR, ER, FR, GR, HR, JR are respectively 4 th, 6 th, 8 th, 10 th, 12 th, 14 th, 16 th, 18 th, 20 th order coefficients in the aspheric surface rotational symmetry component; AP, BP, CP, DP, EP, FP, GP, HP and JP are respectively coefficients of 4 th order, 6 th order, 8 th order, 10 th order, 12 th order, 14 th order, 16 th order, 18 th order and 20 th order in the aspheric surface non-rotational symmetric component. Tables 3 and 4 below show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components of the rotationally asymmetric aspherical surfaces S11 and S12, respectively, which can be used in example 1.
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9780E-01 1.7024E-01 -9.2451E-02 4.7619E-02 -1.8841E-02 4.8923E-03 -7.6496E-04 6.5088E-05 -2.3153E-06
S12 -9.9053E-02 3.8909E-02 -9.9323E-03 1.2524E-03 5.0498E-05 -4.5265E-05 6.8331E-06 -4.5165E-07 1.1343E-08
TABLE 3
AAS noodle AP BP CP DP EP FP GP HP JP
S11 1.5744E-03 9.2682E-04 -5.0676E-06 -5.5722E-06 1.1078E-05 -5.0706E-06 -5.5820E-06 2.5318E-06 0.0000E+00
S12 -2.8545E-03 -2.2540E-03 -1.4234E-03 -5.7282E-05 -6.4323E-04 3.8278E-05 -4.5028E-05 -6.8926E-05 0.0000E+00
TABLE 4
Figure 2 shows the RMS spot diameter for the optical imaging system of example 1 at different image height positions in the first quadrant. Figure 2 shows the RMS spot diameter versus the true ray image height. In FIG. 2, the axes correspond to 0.13mm per grid, the minimum RMS spot diameter is 0.0021675mm, the maximum RMS spot diameter is 0.028047mm, the mean RMS spot diameter is 0.0096413mm, and the standard deviation RMS spot diameter is 0.0064488 mm. As can be seen from the view of figure 2,
the optical imaging system given in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging system according to embodiment 2 of the present application is described below with reference to fig. 3 to 4. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging system according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 2, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.90mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.91mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.07mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 54.3 °.
Table 5 shows a basic parameter table of the optical imaging system of example 2, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 7 and 8 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 2, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000091
TABLE 5
Figure DEST_PATH_GDA0002269316800000101
TABLE 6
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9600E-01 1.7027E-01 -9.2494E-02 4.7618E-02 -1.8841E-02 4.8923E-03 -7.6496E-04 6.5085E-05 -2.3149E-06
S12 -9.9881E-02 3.9265E-02 -9.9134E-03 1.2513E-03 5.0235E-05 -4.5276E-05 6.8343E-06 -4.5154E-07 1.1349E-08
TABLE 7
AAS noodle AP BP CP DP EP FP GP HP JP
S11 2.8257E-03 4.4103E-04 -5.9771E-05 6.6058E-07 9.8474E-06 -3.2485E-06 -2.5852E-06 -3.9349E-07 0.0000E+00
S12 -3.5988E-03 -2.0201E-03 -6.0973E-04 1.3077E-04 -2.1902E-04 2.9495E-05 -2.7850E-05 -6.1697E-06 0.0000E+00
TABLE 8
Figure 4 shows the RMS spot diameter for the optical imaging system of example 2 at different image height positions in the first quadrant. Figure 4 shows the RMS spot diameter versus true ray height. In FIG. 4, the axes correspond to 0.14mm per grid, the minimum RMS spot diameter is 0.0014217mm, the maximum RMS spot diameter is 0.031226mm, the mean RMS spot diameter is 0.0058934mm, and the standard deviation RMS spot diameter is 0.0039676 mm. As can be seen from fig. 4, the optical imaging system according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging system according to embodiment 3 of the present application is described below with reference to fig. 5 to 6. Fig. 5 shows a schematic structural diagram of an optical imaging system according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 3, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.85mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.85mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.05mm, the value of half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 53.8 °.
Table 9 shows a basic parameter table of the optical imaging system of example 3, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Tables 11 and 12 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 3, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000102
Figure DEST_PATH_GDA0002269316800000111
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 6.3658E-01 -7.4134E-02 1.0438E-02 -1.0317E-02 1.7916E-04 -9.9611E-04 1.1323E-04 -4.1574E-05 3.1852E-05
S2 4.6384E-01 -6.8289E-02 -3.3289E-03 -8.7275E-03 -1.0456E-04 -5.1649E-05 1.5390E-04 1.8716E-06 9.0282E-06
S3 -4.7633E-02 -1.3545E-02 3.2007E-03 -8.8058E-04 -5.3054E-05 -3.3683E-04 -1.0374E-04 -3.4268E-05 6.6591E-06
S4 3.1343E-02 8.0332E-03 2.9940E-03 8.9862E-04 3.0266E-04 7.6248E-05 2.7597E-05 1.2473E-05 5.7335E-06
S5 -2.8874E-03 -2.0465E-03 -3.1474E-04 -5.9669E-05 -5.4473E-08 -1.0463E-05 1.9218E-07 8.2443E-07 5.4349E-06
S6 -8.8076E-02 -7.3996E-03 -6.5583E-04 -1.7701E-04 -4.8121E-05 -3.8634E-06 5.0127E-06 1.4405E-06 -1.2007E-06
S7 -2.2292E-01 1.4967E-02 5.2976E-03 9.9795E-04 -9.7175E-05 -5.5260E-05 -6.7877E-07 8.7171E-07 -3.1611E-06
S8 -1.4173E-01 3.0306E-02 4.3467E-03 8.5775E-04 2.3445E-04 -3.3775E-05 3.0352E-05 3.5526E-06 -5.0814E-06
S9 -3.0526E-02 1.4581E-02 -9.3798E-03 -9.1499E-04 1.3346E-04 -2.2911E-04 8.2549E-05 -1.8065E-05 2.1022E-06
S10 5.9773E-01 1.0767E-01 -2.5902E-02 -5.7289E-03 2.8964E-03 1.1816E-03 -4.0287E-04 -6.8186E-05 1.6135E-05
Watch 10
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9464E-01 1.6978E-01 -9.2452E-02 4.7628E-02 -1.8840E-02 4.8922E-03 -7.6497E-04 6.5078E-05 -2.3142E-06
S12 -1.0158E-01 3.9611E-02 -1.0015E-02 1.2491E-03 5.0999E-05 -4.5204E-05 6.8359E-06 -4.5190E-07 1.1336E-08
TABLE 11
AAS noodle AP BP CP DP EP FP GP HP JP
S11 5.2706E-03 -1.7444E-04 -1.7294E-04 -6.3297E-06 8.4562E-06 8.9551E-07 3.9635E-06 5.9895E-06 0.0000E+00
S12 9.4505E-04 -5.3303E-04 9.7132E-04 7.9237E-04 1.8840E-03 9.4682E-05 -1.5078E-04 -8.3828E-05 0.0000E+00
TABLE 12
Figure 6 shows the RMS spot diameter for the optical imaging system of example 3 at different image height positions in the first quadrant. Figure 6 shows the RMS spot diameter versus true ray height. In FIG. 6, the axes correspond to 0.041mm per grid, the minimum RMS spot diameter is 0.00092829mm, the maximum RMS spot diameter is 0.0093665mm, the mean RMS spot diameter is 0.0037792mm, and the standard deviation RMS spot diameter is 0.0019208 mm. As can be seen from fig. 6, the optical imaging system according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging system according to embodiment 4 of the present application is described below with reference to fig. 7 to 8. Fig. 7 shows a schematic structural diagram of an optical imaging system according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 4, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.85mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.85mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.02mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 53.8 °.
Table 13 shows a basic parameter table of the optical imaging system of example 4, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 15 and 16 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 4, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000121
Watch 13
Figure DEST_PATH_GDA0002269316800000122
Figure DEST_PATH_GDA0002269316800000131
TABLE 14
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9579E-01 1.6977E-01 -9.2472E-02 4.7628E-02 -1.8840E-02 4.8922E-03 -7.6498E-04 6.5077E-05 -2.3138E-06
S12 -1.0041E-01 3.9090E-02 -9.9916E-03 1.2515E-03 5.0757E-05 -4.5231E-05 6.8358E-06 -4.5175E-07 1.1363E-08
Watch 15
AAS noodle AP BP CP DP EP FP GP HP JP
S11 4.2475E-03 1.1797E-05 -1.0618E-04 -1.3313E-05 6.5758E-06 5.2947E-07 2.2460E-06 3.8676E-06 0.0000E+00
S12 1.5972E-03 3.1729E-04 8.8134E-04 2.8625E-04 2.4751E-03 4.4850E-05 -1.0116E-04 4.5012E-05 0.0000E+00
TABLE 16
Figure 8 shows the RMS spot diameter for the optical imaging system of example 4 at different image height positions in the first quadrant. Figure 8 shows the RMS spot diameter versus true ray height. In FIG. 8, the axes correspond to 0.04mm per grid, the minimum RMS spot diameter is 0.0011291mm, the maximum RMS spot diameter is 0.0092401mm, the mean RMS spot diameter is 0.003555mm, and the standard deviation RMS spot diameter is 0.0018184 mm. As can be seen from fig. 8, the optical imaging system according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging system according to embodiment 5 of the present application is described below with reference to fig. 9 to 10. Fig. 9 shows a schematic structural diagram of an optical imaging system according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 5, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.85mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.85mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.09mm, the value of half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 53.9 °.
Table 17 shows a basic parameter table of the optical imaging system of example 5 in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 18 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 19 and 20 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 5, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000132
Figure DEST_PATH_GDA0002269316800000141
TABLE 17
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 6.4900E-01 -7.3490E-02 1.2038E-02 -9.3273E-03 3.6491E-04 -8.2132E-04 1.4529E-04 -1.5441E-05 4.3327E-05
S2 4.7809E-01 -5.3154E-02 5.3901E-04 -7.1377E-03 -4.0265E-04 -1.1009E-04 2.1070E-04 7.3921E-05 4.0083E-05
S3 -2.9278E-02 -1.2616E-02 5.0553E-03 -1.5844E-03 -1.1891E-04 -3.4862E-04 -5.4019E-05 -2.6023E-05 9.4760E-06
S4 2.3687E-02 9.2250E-03 3.3148E-03 9.1784E-04 3.1309E-04 8.9047E-05 3.6058E-05 1.4236E-05 3.7094E-06
S5 -7.2354E-03 -2.9181E-03 -5.0959E-04 -9.9485E-05 -2.4520E-05 -1.5240E-05 1.9128E-07 6.1831E-06 9.4695E-06
S6 -1.1699E-01 -8.3821E-03 -1.2838E-03 -4.8807E-04 -1.6250E-04 -3.3353E-05 4.5020E-06 6.2588E-06 6.7935E-06
S7 -2.4492E-01 2.2557E-02 6.8267E-03 5.3401E-04 -1.7596E-04 -1.0662E-04 4.2754E-05 3.9615E-06 -1.0193E-05
S8 -1.6516E-01 3.3851E-02 3.2303E-03 5.8916E-04 5.4760E-04 -2.3235E-04 5.2636E-05 3.1953E-06 -4.2997E-06
S9 2.3042E-02 1.1818E-02 -6.9704E-03 -1.7197E-03 6.0792E-04 -5.3707E-04 6.7830E-05 -1.2770E-05 -2.2867E-05
S10 5.0399E-01 1.0384E-01 -1.8715E-02 -8.3243E-03 1.9525E-03 1.1796E-03 -3.6679E-04 -1.4478E-04 7.3805E-05
Watch 18
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9643E-01 1.6966E-01 -9.2488E-02 4.7628E-02 -1.8840E-02 4.8923E-03 -7.6496E-04 6.5078E-05 -2.3144E-06
S12 -1.0074E-01 3.9703E-02 -1.0048E-02 1.2487E-03 5.1283E-05 -4.5167E-05 6.8384E-06 -4.5220E-07 1.1270E-08
Watch 19
AAS noodle AP BP CP DP EP FP GP HP JP
S11 4.3899E-03 9.6881E-05 -2.2194E-05 -1.9922E-05 2.0391E-06 3.7097E-06 1.0489E-06 -2.3621E-06 0.0000E+00
S12 2.7618E-03 2.7002E-03 1.8306E-03 2.3750E-04 2.6083E-03 -2.9449E-05 -1.1015E-04 3.7410E-05 0.0000E+00
Watch 20
Figure 10 shows the RMS spot diameter for the optical imaging system of example 5 at different image height positions in the first quadrant. FIG. 10 shows RMS spot diameter versus true ray image height. In FIG. 10, the coordinate axes correspond to 0.054mm per grid, the minimum RMS spot diameter is 0.00077895mm, the maximum RMS spot diameter is 0.012541mm, the mean RMS spot diameter is 0.0046786mm, and the standard deviation RMS spot diameter is 0.0026334 mm. As can be seen from fig. 10, the optical imaging system according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging system according to embodiment 6 of the present application is described below with reference to fig. 11 to 12. Fig. 11 shows a schematic configuration diagram of an optical imaging system according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 6, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.85mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.85mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.09mm, the value of half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 53.8 °.
Table 21 shows a basic parameter table of the optical imaging system of example 6, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 22 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 6, wherein each aspherical mirror surface type can be defined by formula (1) given in embodiment 1 above. Tables 23, 24 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11, S12 in embodiment 6, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000151
TABLE 21
Figure DEST_PATH_GDA0002269316800000152
Figure DEST_PATH_GDA0002269316800000161
TABLE 22
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9999E-01 1.6991E-01 -9.2412E-02 4.7631E-02 -1.8840E-02 4.8922E-03 -7.6497E-04 6.5074E-05 -2.3140E-06
S12 -1.0337E-01 4.0169E-02 -1.0117E-02 1.2510E-03 5.1673E-05 -4.5145E-05 6.8340E-06 -4.5243E-07 1.1299E-08
TABLE 23
AAS noodle AP BP CP DP EP FP GP HP JP
S11 5.8403E-03 1.3014E-04 -1.3576E-04 -2.0214E-05 5.6099E-06 2.0914E-06 2.5122E-06 2.8077E-06 0.0000E+00
S12 1.6185E-03 2.7948E-03 2.3726E-03 1.0961E-03 1.7596E-03 -1.1432E-05 -1.6544E-04 -4.2271E-05 0.0000E+00
Watch 24
Figure 12 shows the RMS spot diameter for the optical imaging system of example 6 at different image height positions in the first quadrant. Figure 12 shows the RMS spot diameter versus true ray height. In FIG. 12, the axes correspond to 0.05mm per grid, the minimum RMS spot diameter is 0.00078783mm, the maximum RMS spot diameter is 0.011602mm, the mean RMS spot diameter is 0.0043785mm, and the standard deviation RMS spot diameter is 0.0022669 mm. As can be seen from fig. 12, the optical imaging system according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging system according to embodiment 7 of the present application is described below with reference to fig. 13 to 14. Fig. 13 shows a schematic configuration diagram of an optical imaging system according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 7, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.81mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.82mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 6.05mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 54.0 °.
Table 25 shows a basic parameter table of the optical imaging system of example 7 in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 26 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 27 and 28 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 7, respectively, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000162
Figure DEST_PATH_GDA0002269316800000171
TABLE 25
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.3809E-01 -5.4545E-02 1.5225E-02 -4.9394E-03 9.6401E-04 -4.6039E-04 7.7089E-05 -4.8142E-05 7.3511E-06
S2 4.0468E-01 -4.4238E-02 5.1598E-03 -3.8386E-03 6.7646E-05 -1.3833E-04 3.6497E-05 -2.4967E-05 4.9494E-06
S3 -4.4269E-02 -1.5962E-02 2.6632E-03 -1.2485E-04 2.6132E-04 -2.7778E-05 -1.0737E-05 -1.5733E-05 3.3221E-06
S4 2.2036E-02 3.8156E-03 1.6179E-03 4.8562E-04 1.5633E-04 3.6365E-05 4.9828E-06 2.9398E-06 4.6487E-06
S5 -2.3051E-03 -1.5970E-03 -1.9322E-04 -4.8531E-05 5.3883E-06 4.7028E-08 5.3331E-06 -4.4164E-06 8.1903E-07
S6 -1.0001E-01 -7.1875E-03 -8.5442E-05 -5.7116E-05 -4.2340E-05 -1.5181E-05 -2.3577E-06 1.2896E-06 -9.9028E-08
S7 -2.3020E-01 1.5210E-02 6.2078E-03 7.4182E-04 -3.1737E-04 -7.1801E-05 2.2625E-05 1.0067E-05 -4.1608E-06
S8 -1.3915E-01 3.0519E-02 4.6962E-03 -4.3476E-05 3.7826E-04 -2.1053E-04 6.6082E-05 -5.1090E-06 -3.9330E-06
S9 -3.4316E-02 1.5788E-02 -9.8295E-03 -7.6092E-04 5.4251E-04 -6.7151E-04 2.9632E-04 -1.2611E-04 3.1442E-05
S10 2.8270E-01 7.3616E-02 -3.9974E-03 -3.0360E-03 -2.9653E-04 4.2852E-04 -4.2637E-05 -1.1970E-05 2.2890E-06
Watch 26
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9743E-01 1.6980E-01 -9.2445E-02 4.7629E-02 -1.8840E-02 4.8922E-03 -7.6497E-04 6.5075E-05 -2.3140E-06
S12 -9.8607E-02 3.9195E-02 -9.9884E-03 1.2511E-03 5.0854E-05 -4.5222E-05 6.8342E-06 -4.5178E-07 1.1324E-08
Watch 27
AAS noodle AP BP CP DP EP FP GP HP JP
S11 6.3237E-03 6.6410E-05 -2.0461E-04 -1.1317E-05 8.2841E-06 -3.8722E-07 4.7754E-06 8.0524E-06 0.0000E+00
S12 1.5302E-04 4.8348E-04 8.6581E-04 1.6051E-04 2.1568E-03 -8.4430E-06 -6.9915E-05 4.9051E-05 0.0000E+00
Watch 28
Figure 14 shows the RMS spot diameter for the optical imaging system of example 7 at different image height positions in the first quadrant. Figure 14 shows the RMS spot diameter versus true ray height. In fig. 14, the coordinate axes correspond to 0.14mm per grid, the minimum RMS spot diameter is 0.0018787mm, the maximum RMS spot diameter is 0.030558mm, the mean of the RMS spot diameters is 0.0088953mm, and the standard deviation of the RMS spot diameters is 0.0069636 mm. As can be seen from fig. 14, the optical imaging system according to embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging system according to embodiment 8 of the present application is described below with reference to fig. 15 to 16. Fig. 15 shows a schematic structural view of an optical imaging system according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 8, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.86mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.86mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 5.92mm, the value of half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum field angle is 53.8 °.
Table 29 shows a basic parameter table of the optical imaging system of example 8, in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 30 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 31 and 32 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 8, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000181
Watch 29
Figure DEST_PATH_GDA0002269316800000182
Figure DEST_PATH_GDA0002269316800000191
Watch 30
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9188E-01 1.6996E-01 -9.2489E-02 4.7623E-02 -1.8840E-02 4.8921E-03 -7.6499E-04 6.5078E-05 -2.3131E-06
S12 -1.0108E-01 3.9613E-02 -9.9773E-03 1.2503E-03 5.0576E-05 -4.5274E-05 6.8317E-06 -4.5167E-07 1.1392E-08
Watch 31
AAS noodle AP BP CP DP EP FP GP HP JP
S11 6.9851E-03 -3.2943E-04 -1.8037E-04 1.0131E-05 6.5423E-06 -1.4573E-06 3.4384E-06 4.4151E-06 0.0000E+00
S12 -2.5574E-03 -1.3411E-03 4.8017E-04 2.4666E-04 2.1191E-03 9.2797E-05 -7.4911E-05 -4.2385E-06 0.0000E+00
Watch 32
Figure 16 shows the RMS spot diameter for the optical imaging system of example 8 at different image height positions in the first quadrant. Figure 16 shows the RMS spot diameter versus true ray height. In FIG. 16, the axes correspond to 0.046mm per grid, the minimum RMS spot diameter is 0.0024515mm, the maximum RMS spot diameter is 0.010593mm, the mean RMS spot diameter is 0.0044159mm, and the standard deviation RMS spot diameter is 0.0016578 mm. As can be seen from fig. 16, the optical imaging system according to embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging system according to embodiment 9 of the present application is described below with reference to fig. 17 to 18. Fig. 17 shows a schematic configuration diagram of an optical imaging system according to embodiment 9 of the present application.
As shown in fig. 17, the optical imaging system, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging system has an imaging plane S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane S15.
In embodiment 9, the value of the effective focal length fx of the optical imaging system in the X-axis direction is 2.85mm, the value of the effective focal length fy of the optical imaging system in the Y-axis direction is 2.86mm, the value of the on-axis distance TT L from the object side surface S1 to the imaging surface S15 of the first lens E1 is 5.89mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 is 3.85mm, and the value of half Semi-FOV of the maximum angle of view is 53.8 °.
Table 33 shows a basic parameter table of the optical imaging system of example 9 in which the units of the radius of curvature Y, the radius of curvature X, the thickness/distance, and the focal length are all millimeters (mm). Table 34 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Tables 35 and 36 show the rotationally symmetric components and the higher-order coefficients of the rotationally asymmetric components that can be used for the rotationally asymmetric aspherical surfaces S11 and S12 in embodiment 9, wherein the rotationally asymmetric aspherical surface types can be defined by the formula (2) given in embodiment 1 above.
Figure DEST_PATH_GDA0002269316800000192
Figure DEST_PATH_GDA0002269316800000201
Watch 33
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.3353E-01 -5.5094E-02 1.2229E-02 -5.2998E-03 8.5453E-04 -4.6423E-04 6.5724E-05 -3.8386E-05 1.3279E-05
S2 4.0198E-01 -4.2107E-02 3.0930E-03 -4.8922E-03 4.5396E-04 3.6345E-05 8.3423E-05 -3.0415E-05 2.4255E-06
S3 -3.4100E-02 -1.5626E-02 1.7773E-03 -9.0102E-04 4.1950E-04 -1.7732E-05 -4.7138E-06 -1.1011E-05 2.2482E-06
S4 2.2822E-02 8.7434E-03 3.3167E-03 1.4483E-03 6.2898E-04 3.0503E-04 1.5725E-04 7.1010E-05 2.2868E-05
S5 -6.1662E-03 -1.9575E-03 -2.7284E-04 -7.6649E-05 4.2581E-07 -1.1652E-06 3.2202E-06 -2.5045E-06 1.5542E-06
S6 -1.2572E-01 -5.0487E-03 6.4159E-04 -2.6658E-04 -1.9606E-04 -2.0451E-05 -2.6607E-06 9.4822E-06 1.4823E-06
S7 -2.2543E-01 1.7002E-02 9.7144E-03 -6.7438E-04 -8.2340E-04 2.1360E-04 1.2043E-04 1.1288E-05 -2.9598E-05
S8 -1.2205E-01 3.0705E-02 7.7091E-03 -1.4257E-03 -1.0224E-04 4.8167E-04 9.7065E-05 2.1209E-05 -1.2878E-06
S9 3.2138E-02 8.4868E-03 -1.1580E-02 -1.7846E-03 -9.5891E-04 -2.3578E-04 -1.8101E-04 -4.0790E-05 -2.7836E-05
S10 3.4299E-01 7.1701E-02 -5.3136E-03 -2.8398E-03 -3.3770E-04 4.2231E-04 -3.7858E-05 -3.3567E-06 6.1603E-07
Watch 34
AAS noodle AR BR CR DR ER FR GR HR JR
S11 -2.9135E-01 1.7002E-01 -9.2490E-02 4.7623E-02 -1.8841E-02 4.8921E-03 -7.6499E-04 6.5078E-05 -2.3130E-06
S12 -1.0027E-01 3.9648E-02 -9.9776E-03 1.2499E-03 5.0542E-05 -4.5276E-05 6.8317E-06 -4.5167E-07 1.1392E-08
Watch 35
AAS noodle AP BP CP DP EP FP GP HP JP
S11 6.9814E-03 -3.3531E-04 -1.7740E-04 9.4718E-06 6.8115E-06 -1.7252E-06 3.4082E-06 5.3344E-06 0.0000E+00
S12 -1.7638E-03 -1.2269E-03 3.8791E-04 1.9674E-04 2.0446E-03 9.1156E-05 -6.6472E-05 -5.2688E-06 0.0000E+00
Watch 36
Figure 18 shows the RMS spot diameter for the optical imaging system of example 9 at different image height positions in the first quadrant. FIG. 18 shows RMS spot diameter versus true ray image height. In fig. 18, the coordinate axes correspond to 0.065mm per grid, the minimum RMS spot diameter is 0.0029131mm, the maximum RMS spot diameter is 0.015048mm, the mean of the RMS spot diameters is 0.0048707mm, and the standard deviation of the RMS spot diameters is 0.0020129 mm. As can be seen from fig. 18, the optical imaging system according to embodiment 9 can achieve good imaging quality.
In summary, examples 1 to 9 each satisfy the relationship shown in table 37.
Figure DEST_PATH_GDA0002269316800000202
Figure DEST_PATH_GDA0002269316800000211
Watch 37
The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging system described above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (31)

1. The optical imaging system, in order from an object side to an image side along an optical axis, comprises:
a first lens having a negative optical power;
a second lens having an optical power;
a third lens having optical power;
a fourth lens having an optical power;
a fifth lens having optical power;
a sixth lens having optical power;
at least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is a non-rotationally symmetric aspheric surface;
the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface meet TT L/ImgH < 1.6.
2. The optical imaging system of claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.5 < T56/CT5 < 1.
3. The optical imaging system of claim 1, wherein an effective focal length fx of the optical imaging system in the X-axis direction and an effective focal length f3 of the third lens satisfy 0.5 < fx/f3 < 1.5.
4. The optical imaging system of claim 1, wherein an effective focal length fy in the Y-axis direction of the optical imaging system and an effective focal length f1 of the first lens satisfy-0.7 < fy/f1 < -0.2.
5. The optical imaging system of claim 1, wherein the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy-0.8 < f5/f6 < -0.3.
6. The optical imaging system of claim 1, wherein an effective focal length f1 of the first lens and a radius of curvature R1 of an object side of the first lens satisfy 0.5 < R1/f1 < 1.5.
7. The optical imaging system of claim 1, wherein a radius of curvature R3 of an object-side surface of the second lens and a radius of curvature R4 of an image-side surface of the second lens satisfy 0.5 < R4/R3 < 1.5.
8. The optical imaging system according to claim 1, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object-side surface of the third lens, and a radius of curvature R6 of an image-side surface of the third lens satisfy 0.3 < f3/(R5-R6) < 0.8.
9. The optical imaging system of claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy 0.1 < R10/R7 < 0.6.
10. The optical imaging system according to claim 1, wherein a radius of curvature R10 of an image-side surface of the fifth lens and a radius of curvature R11 of an object-side surface of the sixth lens satisfy 0.3 < R11/(R11-R10) < 0.8.
11. The optical imaging system according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on 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 0.7 < (CT1+ CT2)/(CT3+ CT4) < 1.2.
12. The optical imaging system of claim 1, wherein a sum Σ AT of separation distances on the optical axis between any two adjacent lenses among the first to sixth lenses and a center thickness CT6 of the sixth lens on the optical axis satisfy 0.2 < CT6/Σ AT < 0.7.
13. The optical imaging system of claim 1, wherein an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of an object-side surface of the fourth lens, SAG41, and an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of an object-side surface of the sixth lens, SAG61 satisfy 0.5 < SAG41/SAG61 < 1.0.
14. The optical imaging system of claim 1, wherein the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens satisfy 0.5 < DT41/DT21 < 1.0.
15. The optical imaging system of claim 1, wherein the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy 0.2 < DT11/DT62 < 0.7.
16. The optical imaging system of any one of claims 1 to 15,
the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the object side surface of the fourth lens is a concave surface;
the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has a negative focal power, and has a convex object-side surface and a concave image-side surface.
17. The optical imaging system, in order from an object side to an image side along an optical axis, comprises:
a first lens having an optical power;
a second lens having an optical power;
a third lens having a positive optical power;
a fourth lens having an optical power;
a fifth lens having optical power;
a sixth lens having optical power;
at least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is a non-rotationally symmetric aspheric surface;
the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface meet TT L/ImgH < 1.6;
a center thickness CT5 of the fifth lens on the optical axis and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.5 < T56/CT5 < 1.
18. The optical imaging system of claim 17, wherein an effective focal length fx of the optical imaging system in the X-axis direction and an effective focal length f3 of the third lens satisfy 0.5 < fx/f3 < 1.5.
19. The optical imaging system of claim 17, wherein an effective focal length fy in the Y-axis direction of the optical imaging system and an effective focal length f1 of the first lens satisfy-0.7 < fy/f1 < -0.2.
20. The optical imaging system of claim 17, wherein the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy-0.8 < f5/f6 < -0.3.
21. The optical imaging system of claim 17, wherein an effective focal length f1 of the first lens and a radius of curvature R1 of an object side of the first lens satisfy 0.5 < R1/f1 < 1.5.
22. The optical imaging system of claim 17, wherein a radius of curvature R3 of an object-side surface of the second lens and a radius of curvature R4 of an image-side surface of the second lens satisfy 0.5 < R4/R3 < 1.5.
23. The optical imaging system of claim 17, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object-side surface of the third lens, and a radius of curvature R6 of an image-side surface of the third lens satisfy 0.3 < f3/(R5-R6) < 0.8.
24. The optical imaging system of claim 17, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy 0.1 < R10/R7 < 0.6.
25. The optical imaging system of claim 17, wherein a radius of curvature R10 of an image-side surface of the fifth lens and a radius of curvature R11 of an object-side surface of the sixth lens satisfy 0.3 < R11/(R11-R10) < 0.8.
26. The optical imaging system of claim 17, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on 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 0.7 < (CT1+ CT2)/(CT3+ CT4) < 1.2.
27. The optical imaging system of claim 17, wherein a sum Σ AT of separation distances on the optical axis between any two adjacent lenses among the first to sixth lenses and a center thickness CT6 of the sixth lens on the optical axis satisfy 0.2 < CT6/Σ AT < 0.7.
28. The optical imaging system of claim 17, wherein an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of an object-side surface of the fourth lens, SAG41, and an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of an object-side surface of the sixth lens, SAG61 satisfies 0.5 < SAG41/SAG61 < 1.0.
29. The optical imaging system of claim 17, wherein the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT41 of the object-side surface of the fourth lens satisfy 0.5 < DT41/DT21 < 1.0.
30. The optical imaging system of claim 17, wherein the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy 0.2 < DT11/DT62 < 0.7.
31. The optical imaging system of any of claims 18 to 30,
the first lens has negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the object side surface of the fourth lens is a concave surface;
the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has a negative focal power, and has a convex object-side surface and a concave image-side surface.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111929869A (en) * 2020-09-18 2020-11-13 瑞泰光学(常州)有限公司 Image pickup optical lens
JP6929004B1 (en) * 2020-09-21 2021-09-01 レイテック オプティカル （ジョウシュウ） カンパニーリミテッド Imaging optical lens
CN114200640A (en) * 2020-09-18 2022-03-18 三星电机株式会社 Optical imaging system
CN116338912A (en) * 2023-05-30 2023-06-27 江西联益光学有限公司 Optical lens

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111929869A (en) * 2020-09-18 2020-11-13 瑞泰光学(常州)有限公司 Image pickup optical lens
JP6906675B1 (en) * 2020-09-18 2021-07-21 レイテック オプティカル （ジョウシュウ） カンパニーリミテッド Imaging optical lens
CN114200640A (en) * 2020-09-18 2022-03-18 三星电机株式会社 Optical imaging system
US20220091384A1 (en) * 2020-09-18 2022-03-24 Raytech Optical (Changzhou) Co., Ltd Camera optical lens
CN114200640B (en) * 2020-09-18 2023-03-21 三星电机株式会社 Optical imaging system
US11906704B2 (en) * 2020-09-18 2024-02-20 Raytech Optical (Changzhou) Co., Ltd Camera optical lens
JP6929004B1 (en) * 2020-09-21 2021-09-01 レイテック オプティカル （ジョウシュウ） カンパニーリミテッド Imaging optical lens
CN116338912A (en) * 2023-05-30 2023-06-27 江西联益光学有限公司 Optical lens
CN116338912B (en) * 2023-05-30 2023-10-03 江西联益光学有限公司 optical lens

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