CN210155392U - Optical imaging system - Google Patents
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- CN210155392U CN210155392U CN201921171167.9U CN201921171167U CN210155392U CN 210155392 U CN210155392 U CN 210155392U CN 201921171167 U CN201921171167 U CN 201921171167U CN 210155392 U CN210155392 U CN 210155392U
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Abstract
The application discloses an optical imaging system, which comprises in order from an object side to an image side along an optical axis: the image side surface of the first lens is a concave surface; a second lens having an optical power; a third lens with positive focal power, wherein 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; a fourth lens having a negative optical power; a fifth lens with focal power, wherein the image side surface of the fifth lens is convex; a sixth lens having optical power; half of the Semi-FOV of the maximum field angle of the optical imaging system satisfies Semi-FOV > 60 °; the maximum effective radius DT12 of the image side surface of the first lens and the maximum effective radius DT62 of the image side surface of the sixth lens satisfy 0.5 < DT12/DT62 < 1.
Description
Technical Field
The present application relates to an optical imaging system, and more particularly, to an optical imaging system including six lenses.
Background
In recent years, with the development of scientific technology, the market demand for imaging systems suitable for portable electronic products has been increasing. The rapid development of the imaging system of the mobile phone, especially the popularization of the large-size and high-pixel CMOS chip, makes the mobile phone manufacturer put forward more stringent requirements on the imaging quality of the imaging system. In addition, with the improvement of the performance and the reduction of the size of the CCD and the CMOS devices, higher requirements are also placed on the high imaging quality and the miniaturization of the associated imaging system.
In recent years, wide-angle lenses have been widely used in various fields, and are often used for important functions such as panoramic high-definition image shooting, object positioning, tracking and capturing. In order to meet the miniaturization requirement and meet the imaging requirement, an optical imaging system which can achieve both miniaturization and ultra-wide angle and high resolution is required.
SUMMERY OF THE UTILITY MODEL
The present application provides an optical imaging system applicable to portable electronic products that may address, at least in part, at least one of the above-identified deficiencies in the prior art.
The present application provides an optical imaging system, in order from an object side to an image side along an optical axis, comprising: the image side surface of the first lens with negative focal power can be a concave surface; a second lens having an optical power; the object side surface of the third lens can be a convex surface, and the image side surface of the third lens can be a convex surface; a fourth lens having a negative optical power; the image side surface of the fifth lens can be a convex surface; a sixth lens having optical power.
In one embodiment, the second lens may have a positive optical power.
In one embodiment, the object side surface of the second lens can be convex.
In one embodiment, the object side surface of the fourth lens may be concave.
In one embodiment, the sixth lens may have a negative optical power.
In one embodiment, half of the Semi-FOV of the maximum field angle of the optical imaging system may satisfy Semi-FOV > 60 °.
In one embodiment, the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT62 of the image-side surface of the sixth lens may satisfy 0.5 < DT12/DT62 < 1.
In one embodiment, f/ImgH > 0.6 may be satisfied by the effective focal length f of the optical imaging system and half ImgH of the diagonal length of the effective pixel area on the imaging plane of the optical imaging system.
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 image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens, SAG52 may satisfy 0.2 < SAG41/SAG52 < 0.7.
In one embodiment, an on-axis distance SAG12 from an intersection of an image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens and an edge thickness ET1 of the first lens may satisfy 0.5 < SAG12/ET1 < 1.
In one embodiment, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens can satisfy 0.2 < ET3/ET2 < 0.7.
In one embodiment, the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens can satisfy-1 < f/f1 < -0.5.
In one embodiment, the effective focal length f of the optical imaging system, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens may satisfy 0.5 < f/f3-f/f2 < 1.
In one embodiment, the effective focal length f of the optical imaging system and the combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens may satisfy 0.5 < f/f2345 < 1.5.
In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens can satisfy-1 < f5/f4 < -0.5.
In one embodiment, an effective focal length f of the optical imaging system, a radius of curvature R2 of an image-side surface of the first lens, and a radius of curvature R3 of an object-side surface of the second lens may satisfy 0.2 < f/(R3-R2) < 1.2.
In one embodiment, a radius of curvature R5 of the object-side surface of the third lens and a radius of curvature R6 of the image-side surface of the third lens may satisfy 0.2 < R5/(R5-R6) < 0.7.
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 0.5 < R7/(R7+ R10) < 1.
In one embodiment, the effective focal length f of the optical imaging system and the curvature radius R12 of the image side surface of the sixth lens can satisfy 0.2 < R12/f < 1.2.
In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy 0.3 < CT1/CT2 < 0.8.
In one embodiment, a sum Σ AT of a center thickness CT3 of the third lens in the optical axis, a center thickness CT4 of the fourth lens in the optical axis, and a separation distance between any adjacent two lenses of the first to sixth lenses in the optical axis may satisfy 0.3 < (CT3+ CT4)/Σ AT < 0.8.
In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy 0.2 < T56/(CT5+ CT6) < 0.7.
The optical imaging system has the advantages that the six lenses are adopted, and through reasonable collocation of the lenses made of different materials and reasonable distribution of focal power, surface type, center thickness of each lens, on-axis distance between the lenses and the like, the optical imaging system has at least one beneficial effect of small caliber, large visual angle, high resolution 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. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging system of embodiment 1;
fig. 3 shows a schematic configuration diagram of an optical imaging system according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of 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. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of 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. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging system of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging system according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging system of embodiment 5;
fig. 11 shows a schematic configuration diagram of an optical imaging system according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging system of embodiment 6.
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.
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 optical power, and the image-side surface thereof may be concave; the second lens may have a positive or negative optical power; the third lens can have positive focal power, and the object side surface of the third lens can be a convex surface, and the image side surface of the third lens can be a convex surface; the fourth lens may have a negative optical power; the fifth lens can have negative focal power or positive focal power, and the image side surface of the fifth lens can be a convex surface; the sixth lens may have a positive power or a negative power. By reasonably controlling the positive and negative distribution of the focal power of each component of the optical imaging system and the lens surface curvature, various aberrations of the control system are effectively balanced, and the imaging quality of the optical imaging system is high.
In an exemplary embodiment, the second lens may have a positive optical power, and the object-side surface of the second lens may be a convex surface; the object side surface of the fourth lens can be a concave surface; the sixth lens may have a negative optical power. By further controlling the positive and negative distribution of the focal power of each component of the optical imaging system and the surface curvature of the lens, the spherical aberration and the coma aberration of the optical imaging system are balanced and eliminated, and the risk of ghost images of the optical imaging system can be reduced, so that the imaging performance of the optical imaging system is improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional Semi-FOV > 60 °, where Semi-FOV is half of the maximum field angle of the optical imaging system. More specifically, the Semi-FOV may satisfy 63 ° < Semi-FOV < 70 °. Satisfying Semi-FOV > 60 DEG, the optical imaging system has a larger field angle range.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < DT12/DT62 < 1, where DT12 is the maximum effective radius of the image-side surface of the first lens and DT62 is the maximum effective radius of the image-side surface of the sixth lens. More specifically, DT12 and DT62 may satisfy 0.55 < DT12/DT62 < 0.8. The ratio of the maximum effective radius of the image side surface of the first lens to the maximum effective radius of the image side surface of the sixth lens is controlled, so that the relative brightness of the edge of an effective pixel area on an imaging surface is high, the optical length of an optical imaging system is shortened, the aperture of the optical imaging system is reduced, and the optical imaging system is miniaturized.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression f/ImgH > 0.6, where f is an effective focal length of the optical imaging system and ImgH is a half of a diagonal length of an effective pixel area on an imaging plane of the optical imaging system. More specifically, f and ImgH may satisfy 0.63 < f/ImgH < 1. By controlling the ratio of the effective focal length to the image height of the optical imaging system, the total optical length of the optical imaging system can be shortened, so that the optical imaging system has a smaller size.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < SAG41/SAG52 < 0.7, 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 SAG52 is an on-axis distance from an intersection of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens. More specifically, SAG41 and SAG52 may satisfy 0.32 < SAG41/SAG52 < 0.57. By controlling the rise of the object side surface of the fourth lens and the rise of the image side surface of the fifth lens to satisfy 0.2 < SAG41/SAG52 < 0.7, the astigmatic aberration of the optical imaging system can be corrected, and image qualities in different directions can be balanced.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < SAG12/ET1 < 1, where SAG12 is an on-axis distance from an intersection of an image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens, and ET1 is an edge thickness of the first lens. More specifically, SAG12 and ET1 can satisfy 0.70 < SAG12/ET1 < 0.95. The ratio of the rise of the image side surface of the first lens to the edge thickness of the first lens is controlled, so that the first lens has better machinability, and is favorable for correcting coma aberration of the optical imaging system, and the imaging quality of the optical imaging system is good.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < ET3/ET2 < 0.7, where ET2 is the edge thickness of the second lens and ET3 is the edge thickness of the third lens. More specifically, ET2 and ET3 satisfy 0.27 < ET3/ET2 < 0.58. By controlling the ratio of the edge thickness of the second lens to the edge thickness of the third lens, the assembly and the processing of the optical imaging system are facilitated, and the optical imaging system has better structural stability. Optionally, a diaphragm is disposed between the second lens and the third lens.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression-1 < f/f1 < -0.5, where f is an effective focal length of the optical imaging system, and f1 is an effective focal length of the first lens. More specifically, f and f1 can satisfy-0.73 < f/f1 < -0.60. By controlling the focal power of the first lens, the spherical aberration of the optical imaging system can be corrected well, so that 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 0.5 < f/f3-f/f2 < 1, where f is an effective focal length of the optical imaging system, f2 is an effective focal length of the second lens, and f3 is an effective focal length of the third lens. More specifically, f2, and f3 can satisfy 0.52 ≦ f/f3-f/f2 < 0.92. By controlling the effective focal length of the second lens and the effective focal length of the third lens, coma aberration of the optical imaging system can be corrected. Furthermore, the imaging quality of the off-axis field of view can be improved at Semi-FOV > 60 deg..
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < f/f2345 < 1.5, where f is an effective focal length of the optical imaging system, and f2345 is a combined focal length of the second lens, the third lens, the fourth lens, and the fifth lens. More specifically, f and f2345 may satisfy 0.85 < f/f2345 < 1.15. And controlling the ratio of the combined focal length of the first lens to the sixth lens to the combined focal length of the second lens to the fifth lens, so that the lenses are matched to correct the spherical aberration of the optical imaging system and share the correction of the spherical aberration, and further the image 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-1 < f5/f4 < -0.5, where f4 is an effective focal length of the fourth lens and f5 is an effective focal length of the fifth lens. More specifically, f4 and f5 satisfy-0.92 < f5/f4 < -0.57. The ratio of the effective focal length of the fifth lens to the effective focal length of the fourth lens is controlled, so that the magnification chromatic aberration and the axial chromatic aberration of the optical imaging system are corrected, and the imaging performance of the optical imaging system is good.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < f/(R3-R2) < 1.2, where f is an effective focal length of the optical imaging system, R2 is a radius of curvature of an image-side surface of the first lens, and R3 is a radius of curvature of an object-side surface of the second lens. More specifically, f, R2, and R3 may satisfy 0.40 < f/(R3-R2) < 0.95. The image side surface of the first lens faces the object side surface of the second lens, and the ratio of the effective focal length of the optical imaging system to the difference of the curvature radiuses of the two mirror surfaces is controlled, so that stray light generated by the first lens can be weakened and eliminated, 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 0.2 < R5/(R5-R6) < 0.7, where 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, R5 and R6 may satisfy 0.21 < R5/(R5-R6) < 0.62. The curvature radius of the front mirror surface and the rear mirror surface of the third lens is controlled, so that the spherical aberration of the optical imaging system is corrected.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.5 < R7/(R7+ R10) < 1, 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 0.52 < R7/(R7+ R10) < 0.93. By controlling the curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fifth lens, the object side surface and the image side surface of the fifth lens meet the requirement that R7/(R7+ R10) < 1 in a range of 0.5, the field curvature aberration of an off-axis field of view of the optical imaging system is favorably corrected, the marginal field of view has higher imaging quality, and the imaging performance of the optical imaging system is further improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < R12/f < 1.2, where f is an effective focal length of the optical imaging system, and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, f and R12 may satisfy 0.4 < R12/f < 1.0. By controlling the ratio of the curvature radius of the image side surface of the sixth lens to the effective focal length of the optical imaging system, the rear focus of the optical imaging system is favorably shortened, the optical total length of the optical imaging system is further shortened, and the optical imaging system is miniaturized.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.3 < CT1/CT2 < 0.8, where CT1 is a central thickness of the first lens on the optical axis and CT2 is a central thickness of the second lens on the optical axis. More specifically, CT1 and CT2 satisfy 0.4 < CT1/CT2 < 0.8. By controlling the ratio of the central thickness of the first lens to the central thickness of the second lens, the field curvature aberration of the off-axis field of the optical imaging system is corrected, the imaging quality of the edge field is improved, and the imaging performance 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 < (CT3+ CT4)/Σ AT < 0.8, where CT3 is a central thickness of the third lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, and Σ AT is a sum of separation distances on the optical axis between any adjacent two lenses of the first to sixth lenses. More specifically, CT3, CT4, and Σ AT may satisfy 0.45 < (CT3+ CT4)/Σ AT < 0.73. By controlling the ratio of the sum of the central thickness of the third lens and the central thickness of the fourth lens to the sum of the air spaces between the first lens and the sixth lens, the chromatic aberration of the optical imaging system can be corrected, and in addition, the assembly of each lens is facilitated, so that the optical imaging system has better processability.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.2 < T56/(CT5+ CT6) < 0.7, where CT5 is a central thickness of the fifth lens on the optical axis, CT6 is a central thickness of the sixth lens on the optical axis, and T56 is a separation distance between the fifth lens and the sixth lens on the optical axis. More specifically, CT5, CT6, and T56 may satisfy 0.33 < T56/(CT5+ CT6) < 0.58. By controlling the ratio of the distance between the fifth lens and the sixth lens to the distance behind the center thicknesses of the two lenses, the ratio satisfies 0.2 < T56/(CT5+ CT6) < 0.7, and on one hand, the ratio is not too large, thereby being beneficial to keeping the miniaturization of the optical imaging system; on the other hand, the ratio is not small, so that the optical imaging system has better assemblage property, and is beneficial to correcting off-axis aberration of the optical imaging system and weakening the intensity of ghost images. And the optical imaging system has better manufacturability and higher imaging quality.
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 further has excellent optical properties such as a large viewing angle and high resolution.
In the embodiment of the present application, at least one of the mirror surfaces of the respective lenses is an aspherical mirror surface, that is, at least one of the object-side surface and the 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 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, 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.
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 2D. 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 convex 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 1 shows a basic parameter table of the optical imaging system of example 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
TABLE 1
In embodiment 1, the value of the effective focal length f of the optical imaging system is 2.11mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.43, the value of the on-axis distance TTL from the object side surface of the first lens to the imaging plane is 8.17mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging plane is 3.03mm, and the value of half Semi-FOV of the maximum angle of view is 65.0 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the sixth lens E6 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the height h of the aspheric surface along the optical axis,distance rise from aspheric vertex; 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 coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 14、A6、A8、A10、A12、A14And A16。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 3.5048E-02 | -1.2905E-02 | 3.1839E-03 | -5.2002E-04 | 5.2429E-05 | -2.9434E-06 | 7.0115E-08 |
| S2 | 6.2777E-02 | -7.8676E-04 | -9.2155E-03 | 3.0238E-03 | 3.0308E-03 | -1.5554E-03 | 1.2463E-04 |
| S3 | -2.3075E-02 | -3.9186E-03 | -1.7340E-03 | 8.5768E-03 | -9.8400E-03 | 4.6221E-03 | -7.7201E-04 |
| S4 | -1.0782E-01 | 1.0276E-01 | 8.6634E-01 | -4.4512E+00 | 1.0378E+01 | -1.1785E+01 | 5.3677E+00 |
| S5 | -1.1895E-01 | 2.6638E-01 | -3.4848E-01 | 3.9127E-01 | -3.5368E-01 | 4.6942E-01 | -2.6054E-01 |
| S6 | -2.1563E-01 | 3.9258E-02 | 4.0955E-01 | -1.5044E+00 | 3.1349E+00 | -3.3362E+00 | 1.5106E+00 |
| S7 | -4.0040E-01 | 1.5796E-01 | -2.8202E-01 | 1.5964E+00 | -2.7109E+00 | 1.9395E+00 | -4.9026E-01 |
| S8 | -1.0579E-01 | -5.1426E-03 | -3.3778E-02 | 4.0150E-01 | -5.3514E-01 | 2.8060E-01 | -5.3906E-02 |
| S9 | 7.4032E-02 | -1.2589E-01 | -2.2274E-02 | 2.2653E-01 | -2.2263E-01 | 8.9768E-02 | -1.3424E-02 |
| S10 | -8.0648E-02 | 1.0508E-01 | -1.0734E-01 | 8.2725E-02 | -5.0856E-02 | 2.0022E-02 | -3.0854E-03 |
| S11 | -9.5449E-02 | -1.1580E-01 | 1.5747E-01 | -9.9573E-02 | 3.4409E-02 | -6.0191E-03 | 4.1645E-04 |
| S12 | -1.4087E-01 | 6.9392E-02 | -2.3850E-02 | 5.3953E-03 | -7.8140E-04 | 6.5227E-05 | -2.3868E-06 |
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the system. Fig. 2B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging system of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging system of embodiment 1, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 2A to 2D, the optical imaging system according to 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 4D. 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In embodiment 2, the value of the effective focal length f of the optical imaging system is 2.65mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.43, the value of the on-axis distance TTL of the object side surface of the first lens to the imaging plane is 8.60mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging plane is 4.09mm, and the value of the half Semi-FOV of the maximum angle of view is 65.0 °.
Table 3 shows a basic parameter table of the optical imaging system of example 2, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm). Table 4 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.
TABLE 3
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 3.6098E-02 | -1.1235E-02 | 2.4402E-03 | -3.6916E-04 | 3.6658E-05 | -2.1052E-06 | 5.2314E-08 |
| S2 | 5.8864E-02 | -1.4631E-03 | -5.0635E-03 | -7.1470E-04 | 2.2343E-03 | -1.0048E-03 | 1.3568E-04 |
| S3 | -2.5652E-02 | -2.0035E-03 | -9.6416E-03 | 9.3691E-03 | -5.9584E-03 | 2.2326E-03 | -3.1746E-04 |
| S4 | -6.7475E-02 | 9.6039E-02 | -5.2304E-02 | -1.6090E-01 | 5.0011E-01 | -5.1529E-01 | 1.9867E-01 |
| S5 | -7.2246E-02 | 2.4821E-01 | -6.5138E-01 | 1.5321E+00 | -2.2799E+00 | 1.9044E+00 | -6.6035E-01 |
| S6 | -1.5088E-01 | -2.3377E-01 | 1.1682E+00 | -2.8058E+00 | 4.0951E+00 | -3.2218E+00 | 1.0865E+00 |
| S7 | -2.4968E-01 | -2.4204E-01 | 8.4211E-01 | -1.4899E+00 | 1.9362E+00 | -1.4846E+00 | 4.9406E-01 |
| S8 | 2.5858E-04 | -4.6811E-01 | 9.5813E-01 | -8.9177E-01 | 4.5601E-01 | -1.2089E-01 | 1.2480E-02 |
| S9 | 9.8438E-02 | -5.0444E-01 | 9.2559E-01 | -8.8914E-01 | 4.8141E-01 | -1.3913E-01 | 1.6725E-02 |
| S10 | -5.5370E-02 | 6.5028E-02 | -5.8470E-02 | 3.9358E-02 | -1.7526E-02 | 4.4183E-03 | -4.5767E-04 |
| S11 | -5.3005E-02 | -5.7458E-02 | 3.4518E-02 | -9.2845E-03 | 6.2770E-05 | 4.8227E-04 | -6.4029E-05 |
| S12 | -1.0422E-01 | 3.3667E-02 | -7.3646E-03 | 1.0629E-03 | -9.7257E-05 | 5.0883E-06 | -1.1660E-07 |
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging system of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging system of embodiment 2, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 4A to 4D, 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 6D. 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 includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a stop STO, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element 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 convex 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In embodiment 3, the value of the effective focal length f of the optical imaging system is 2.82mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.53, the value of the on-axis distance TTL from the object side surface of the first lens to the imaging plane is 8.60mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging plane is 3.03mm, and the value of half Semi-FOV of the maximum angle of view is 65.0 °.
Table 5 shows a basic parameter table of the optical imaging system of example 3, in which the units of the radius of curvature, the thickness, 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 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.7028E-02 | -6.3171E-03 | 1.2887E-03 | -2.0923E-04 | 2.2748E-05 | -1.3927E-06 | 3.5940E-08 |
| S2 | 4.4855E-02 | -2.1489E-03 | 1.0154E-02 | -1.3807E-02 | 9.7349E-03 | -3.4894E-03 | 4.5183E-04 |
| S3 | -2.8257E-02 | -1.2789E-02 | 1.0141E-02 | -1.0258E-02 | 3.8319E-03 | 2.0943E-04 | -2.0485E-04 |
| S4 | -6.1988E-02 | 3.0921E-03 | 1.4888E-01 | -3.7361E-01 | 5.0683E-01 | -3.5253E-01 | 1.0259E-01 |
| S5 | -2.5100E-02 | 4.8202E-02 | -4.9794E-02 | 1.8544E-01 | -3.2739E-01 | 2.9504E-01 | -9.6979E-02 |
| S6 | -1.8568E-01 | 6.9733E-03 | 2.9752E-01 | -6.2949E-01 | 8.6803E-01 | -6.8477E-01 | 2.5122E-01 |
| S7 | -2.9173E-01 | -3.2332E-02 | 2.8483E-01 | -2.5299E-02 | -4.3775E-01 | 4.5520E-01 | -1.4160E-01 |
| S8 | -8.1832E-02 | -1.8566E-01 | 6.3197E-01 | -7.5369E-01 | 4.7624E-01 | -1.5743E-01 | 2.1360E-02 |
| S9 | 2.9123E-02 | -2.3822E-01 | 4.9138E-01 | -5.2831E-01 | 3.1484E-01 | -9.8496E-02 | 1.2741E-02 |
| S10 | -3.1771E-02 | 3.4783E-02 | -4.2394E-02 | 3.2705E-02 | -1.6137E-02 | 4.4186E-03 | -4.6170E-04 |
| S11 | -1.1314E-01 | -5.0513E-02 | 7.6884E-02 | -4.6459E-02 | 1.5063E-02 | -2.4284E-03 | 1.5286E-04 |
| S12 | -1.3597E-01 | 6.3418E-02 | -2.0913E-02 | 4.5225E-03 | -6.2768E-04 | 4.9612E-05 | -1.6677E-06 |
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging system of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging system of embodiment 3, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 6A to 6D, 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 8D. 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 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In embodiment 4, the value of the effective focal length f of the optical imaging system is 2.29mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.43, the value of the on-axis distance TTL of the object side surface of the first lens to the imaging plane is 8.50mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging plane is 3.40mm, and the value of half Semi-FOV of the maximum angle of view is 65.0 °.
Table 7 shows a basic parameter table of the optical imaging system of example 4 in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm). Table 8 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.
TABLE 7
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging system of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging system of embodiment 4, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 8A to 8D, 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 10D. 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 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 concave 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In embodiment 5, the value of the effective focal length f of the optical imaging system is 2.11mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.48, the value of the on-axis distance TTL of the object side surface of the first lens to the imaging plane is 8.50mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging plane is 2.40mm, and the value of half Semi-FOV of the maximum angle of view is 65.0 °.
Table 9 shows a basic parameter table of the optical imaging system of example 5 in which the units of the radius of curvature, the thickness, 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 example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 9
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 3.6110E-02 | -1.2315E-02 | 3.1387E-03 | -5.3966E-04 | 5.6862E-05 | -3.3147E-06 | 8.2021E-08 |
| S2 | 6.6864E-02 | -9.4516E-04 | 6.7756E-03 | -2.1705E-02 | 2.5517E-02 | -1.1314E-02 | 1.5572E-03 |
| S3 | -1.9975E-02 | -1.8568E-02 | 3.6218E-02 | -5.6964E-02 | 4.5910E-02 | -2.0065E-02 | 3.8054E-03 |
| S4 | -5.1531E-02 | -5.2052E-02 | 5.8662E-01 | -1.9086E+00 | 3.2361E+00 | -2.7359E+00 | 9.1980E-01 |
| S5 | -5.7759E-02 | 3.2832E-02 | 1.1044E-01 | -4.9721E-01 | 8.2796E-01 | -6.2393E-01 | 1.8739E-01 |
| S6 | -1.6889E-01 | -1.2533E-01 | 8.2553E-01 | -2.3324E+00 | 3.6433E+00 | -2.8512E+00 | 9.0537E-01 |
| S7 | -3.0909E-01 | -5.2315E-02 | 5.6031E-01 | -1.4056E+00 | 2.0667E+00 | -1.4874E+00 | 4.1403E-01 |
| S8 | 1.7988E-02 | -4.2907E-01 | 1.0901E+00 | -1.4867E+00 | 1.2120E+00 | -5.3139E-01 | 9.4683E-02 |
| S9 | 3.9639E-02 | -2.6837E-01 | 4.3378E-01 | -4.0367E-01 | 1.8756E-01 | -1.8014E-02 | -8.1989E-03 |
| S10 | 3.6712E-03 | -1.7500E-02 | 2.8532E-02 | -2.2740E-02 | -2.5228E-04 | 9.7286E-03 | -3.0324E-03 |
| S11 | -1.2147E-01 | 2.3649E-02 | 1.3654E-02 | -1.6070E-02 | 9.2500E-03 | -2.5543E-03 | 2.6323E-04 |
| S12 | -1.0960E-01 | 5.8028E-02 | -2.6274E-02 | 8.5179E-03 | -1.7989E-03 | 2.1325E-04 | -1.0735E-05 |
Watch 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of example 5. Fig. 10C shows a distortion curve of the optical imaging system of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging system of embodiment 5, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 10A to 10D, 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 12D. 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 convex 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 convex 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 provided by the present embodiment has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In embodiment 6, the value of the effective focal length f of the optical imaging system is 2.11mm, the ratio of the effective focal length f to the entrance pupil diameter EPD is 2.40, the value of the on-axis distance TTL of the object side surface of the first lens to the imaging plane is 8.08mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging plane is 3.02mm, and the value of half Semi-FOV of the maximum angle of view is 65.0 °.
Table 11 shows a basic parameter table of the optical imaging system of example 6 in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.7910E-02 | -6.9558E-03 | 6.9319E-04 | -2.6318E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 6.2829E-02 | 8.6034E-03 | -7.1324E-03 | -3.7048E-03 | 8.6852E-04 | 0.0000E+00 | 0.0000E+00 |
| S3 | -1.7696E-02 | 1.1461E-03 | -1.3451E-02 | 7.2493E-03 | -1.0390E-03 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.1640E-02 | -1.8732E-02 | 2.2484E-02 | -4.2434E-03 | 6.9669E-04 | 0.0000E+00 | 0.0000E+00 |
| S5 | 8.0095E-03 | 1.0390E-02 | -1.1303E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.1718E-01 | 2.9214E-02 | -8.7733E-02 | 4.4374E-02 | -3.6616E-02 | 0.0000E+00 | 0.0000E+00 |
| S7 | -2.3118E-01 | 1.6650E-01 | -1.7217E-01 | 5.9374E-02 | 2.8929E-02 | 0.0000E+00 | 0.0000E+00 |
| S8 | -1.4082E-01 | 1.4578E-01 | -1.1380E-01 | 6.0635E-02 | -1.1381E-02 | 0.0000E+00 | 0.0000E+00 |
| S9 | -1.1808E-02 | 8.4195E-04 | 8.5251E-04 | -3.0533E-03 | 9.7618E-04 | 0.0000E+00 | 0.0000E+00 |
| S10 | -4.7157E-02 | 6.5693E-02 | -5.3203E-02 | 2.7786E-02 | -8.4392E-03 | 1.1402E-03 | 0.0000E+00 |
| S11 | -1.9625E-01 | 3.1719E-02 | -1.4429E-02 | 6.9034E-03 | -8.4533E-04 | 0.0000E+00 | 0.0000E+00 |
| S12 | -8.1140E-02 | 2.6070E-02 | -6.4182E-03 | 8.3861E-04 | -4.3705E-05 | 0.0000E+00 | 0.0000E+00 |
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging system of example 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of example 6. Fig. 12C shows a distortion curve of the optical imaging system of embodiment 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging system of example 6, which represents the deviation of different image heights on the imaging plane after the light passes through the system. As can be seen from fig. 12A to 12D, the optical imaging system according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
Watch 13
The present application also provides an imaging device provided with an electron photosensitive element to image, which may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (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 those skilled in the art that the scope of the present application is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the spirit 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 (34)
1. The optical imaging system, in order from an object side to an image side along an optical axis, comprises:
the image side surface of the first lens is a concave surface;
a second lens having an optical power;
a third lens with positive focal power, wherein 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;
a fourth lens having a negative optical power;
a fifth lens with focal power, wherein the image side surface of the fifth lens is convex;
a sixth lens having optical power;
half of the Semi-FOV of the maximum field angle of the optical imaging system satisfies Semi-FOV > 60 °;
the maximum effective radius DT12 of the image side surface of the first lens and the maximum effective radius DT62 of the image side surface of the sixth lens satisfy 0.5 < DT12/DT62 < 1.
2. The optical imaging system of claim 1, wherein the second lens has a positive optical power, and an object-side surface thereof is convex;
the object side surface of the fourth lens is a concave surface;
the sixth lens has a negative power.
3. The optical imaging system according to claim 1, wherein f/ImgH > 0.6 is satisfied by an effective focal length f of the optical imaging system and a half ImgH of a diagonal length of an effective pixel area on an imaging plane of the optical imaging system.
4. The optical imaging system according to 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 the object-side surface of the fourth lens, SAG41, and an intersection of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens, SAG52 satisfies 0.2 < SAG41/SAG52 < 0.7.
5. The optical imaging system of claim 1, wherein an on-axis distance SAG12 from an intersection of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens and an edge thickness ET1 of the first lens satisfy 0.5 < SAG12/ET1 < 1.
6. The optical imaging system of claim 1, wherein the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy 0.2 < ET3/ET2 < 0.7.
7. The optical imaging system of claim 1, wherein the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens satisfy-1 < f/f1 < -0.5.
8. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system, an effective focal length f2 of the second lens, and an effective focal length f3 of the third lens satisfy 0.5 < f/f3-f/f2 < 1.
9. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and a combined focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy 0.5 < f/f2345 < 1.5.
10. The optical imaging system of claim 1, wherein the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy-1 < f5/f4 < -0.5.
11. The optical imaging system according to claim 1, wherein an effective focal length f of the optical imaging system, a radius of curvature R2 of an image-side surface of the first lens, and a radius of curvature R3 of an object-side surface of the second lens satisfy 0.2 < f/(R3-R2) < 1.2.
12. The optical imaging system according to claim 1, wherein 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 0.2 < R5/(R5-R6) < 0.7.
13. The optical imaging system according to 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 0.5 < R7/(R7+ R10) < 1.
14. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and a radius of curvature R12 of an image-side surface of the sixth lens satisfy 0.2 < R12/f < 1.2.
15. The optical imaging system of claim 1, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT2 of the second lens on the optical axis satisfy 0.3 < CT1/CT2 < 0.8.
16. The optical imaging system of any one of claims 1 to 15, wherein a sum Σ AT of a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a separation distance between any adjacent two lenses of the first to sixth lenses on the optical axis satisfies 0.3 < (CT3+ CT4)/Σ AT < 0.8.
17. The optical imaging system according to any one of claims 1 to 15, wherein a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.2 < T56/(CT5+ CT6) < 0.7.
18. The optical imaging system, in order from an object side to an image side along an optical axis, comprises:
the image side surface of the first lens is a concave surface;
a second lens having a refractive power, an object-side surface of which is convex;
a third lens with positive focal power, wherein 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;
a fourth lens having a negative refractive power, an object-side surface of which is concave;
a fifth lens with focal power, wherein the image side surface of the fifth lens is convex;
a sixth lens having optical power;
half of the Semi-FOV of the maximum field angle of the optical imaging system satisfies Semi-FOV > 60 °;
the effective focal length f of the optical imaging system and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging system meet the condition that f/ImgH is more than 0.6.
19. The optical imaging system of claim 18, wherein the second lens has a positive optical power and the sixth lens has a negative optical power.
20. The optical imaging system of claim 18, wherein the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy 0.5 < DT12/DT62 < 1.
21. The optical imaging system of claim 18, 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 the object-side surface of the fourth lens, SAG41, and an intersection of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens, SAG52 satisfies 0.2 < SAG41/SAG52 < 0.7.
22. The optical imaging system of claim 18, wherein an on-axis distance SAG12 from an intersection of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens and an edge thickness ET1 of the first lens satisfy 0.5 < SAG12/ET1 < 1.
23. The optical imaging system of claim 18, wherein the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy 0.2 < ET3/ET2 < 0.7.
24. The optical imaging system of claim 18, wherein the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens satisfy-1 < f/f1 < -0.5.
25. The optical imaging system of claim 18, wherein the effective focal length f of the optical imaging system, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy 0.5 < f/f3-f/f2 < 1.
26. The optical imaging system of claim 18, wherein an effective focal length f of the optical imaging system and a combined focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy 0.5 < f/f2345 < 1.5.
27. The optical imaging system of claim 18, wherein the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy-1 < f5/f4 < -0.5.
28. The optical imaging system of claim 18, wherein an effective focal length f of the optical imaging system, a radius of curvature R2 of an image-side surface of the first lens, and a radius of curvature R3 of an object-side surface of the second lens satisfy 0.2 < f/(R3-R2) < 1.2.
29. The optical imaging system of claim 18, wherein 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 0.2 < R5/(R5-R6) < 0.7.
30. The optical imaging system of claim 18, 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 0.5 < R7/(R7+ R10) < 1.
31. The optical imaging system of claim 18, wherein an effective focal length f of the optical imaging system and a radius of curvature R12 of an image-side surface of the sixth lens satisfy 0.2 < R12/f < 1.2.
32. The optical imaging system of claim 18, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT2 of the second lens on the optical axis satisfy 0.3 < CT1/CT2 < 0.8.
33. The optical imaging system of any one of claims 18 to 32, wherein a sum Σ AT of a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a separation distance between any adjacent two lenses of the first to sixth lenses on the optical axis satisfies 0.3 < (CT3+ CT4)/Σ AT < 0.8.
34. The optical imaging system of any one of claims 18 to 32, wherein a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.2 < T56/(CT5+ CT6) < 0.7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286474A (en) * | 2019-07-24 | 2019-09-27 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN114442280A (en) * | 2022-02-15 | 2022-05-06 | 浙江舜宇光学有限公司 | Imaging lens group |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286474A (en) * | 2019-07-24 | 2019-09-27 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN110286474B (en) * | 2019-07-24 | 2024-04-19 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN114442280A (en) * | 2022-02-15 | 2022-05-06 | 浙江舜宇光学有限公司 | Imaging lens group |
| CN114442280B (en) * | 2022-02-15 | 2023-09-22 | 浙江舜宇光学有限公司 | Imaging lens group |
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