CN211086777U - Optical imaging system - Google Patents
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- CN211086777U CN211086777U CN201921298438.7U CN201921298438U CN211086777U CN 211086777 U CN211086777 U CN 211086777U CN 201921298438 U CN201921298438 U CN 201921298438U CN 211086777 U CN211086777 U CN 211086777U
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Abstract
The application discloses an optical imaging system which sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, and a distance TT L between the maximum field angle FOV of the optical imaging system and the object-side surface of the first lens and the image-side surface of the optical imaging system on the optical axis from the object side to the image side, wherein the object-side surface of the first lens is a convex surface, the distance TT L between the maximum field angle FOV of the optical imaging system and the object-side surface of the first lens meets the requirement that tan (FOV/2)/TT L is more than 1.0mm L‑1(ii) a The central thickness CT1 of the first lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.9 ≤ CT1/CT4 < 1.5.
Description
Technical Field
The present application relates to an optical imaging system, and more particularly, to an optical imaging system including six lenses.
Background
With the continuous change of market demands, ultra-wide angle imaging systems are increasingly used in the fields of monitoring, military, virtual reality and the like. However, the ultra-wide angle imaging system has the problems of large aberration, low pixel and the like, and the application of the ultra-wide angle imaging system in the fields of industry, life and the like is severely limited.
In order to meet the miniaturization requirement and meet the imaging requirement, an optical imaging system which can satisfy both miniaturization, an ultra-wide angle and high pixels 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 first lens with negative focal power, the object side surface of the first lens can be a convex surface; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power; a sixth lens having a positive optical power.
In one embodiment, the distance TT L between the maximum field angle FOV of the optical imaging system and the object-side surface of the first lens and the image-side surface of the optical imaging system on the optical axis may satisfy tan (FOV/2)/TT L > 1.0mm-1。
In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis may satisfy 0.9 ≦ CT1/CT4 < 1.5.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy 2.5 < f1/f2 < 8.0.
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-0.3 < f/f1 < 0.
In one embodiment, the effective focal length f of the optical imaging system and the effective focal length f3 of the third lens may satisfy 0 < f/f3 < 0.4.
In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens can satisfy 1.4 ≦ f6/f4 < 2.5.
In one embodiment, the material of the first lens can be glass, and the refractive index N1 of the first lens can satisfy N1 ≧ 1.70.
In one embodiment, the combined focal length f45 of the fourth and fifth lenses and the effective focal length f3 of the third lens may satisfy 0 < f45/f3 < 1.5.
In one embodiment, a separation distance T23 between the second lens and the third lens on the optical axis and a separation distance T12 between the first lens and the second lens on the optical axis may satisfy 1.0 < T23/T12 < 2.0.
In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy | (R7+ R8)/(R7-R8) | ≦ 0.1.
In one embodiment, the effective focal length f of the optical imaging system and the curvature radius R11 of the object side surface of the sixth lens can satisfy f/R11 ≦ 1.0.
In one embodiment, the on-axis distance SAG12 from the intersection point of the image-side surface of the first lens and the optical axis to the maximum effective semi-aperture vertex of the image-side surface of the first lens and the edge thickness ET1 of the first lens can satisfy 0.7 ≦ SAG12/ET1 < 1.3.
This application has adopted six lens, through the reasonable collocation of the lens of different materials and the focal power of each lens of rational distribution, face type, the central thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging system has at least one beneficial effect such as miniaturization, super wide angle, high pixel.
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, an f-theta distortion curve, and a relative illuminance 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, an f-theta distortion curve, and a relative illuminance 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, an f-theta distortion curve, and a relative illuminance 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, an f-theta distortion curve, and a relative illuminance 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, an f- θ distortion curve, and a relative illuminance curve, respectively, of 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. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, an f- θ distortion curve, and a relative illuminance curve, respectively, of 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. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, an f- θ distortion curve, and a relative illuminance curve, respectively, of 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. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, an f- θ distortion curve, and a relative illuminance curve, respectively, of the optical imaging system of example 8.
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 optical imaging system may include a front group and a rear group, the front group may include a first lens, a second lens, and a third lens, and the rear group may include a fourth lens, a fifth lens, and a sixth lens. The front group and the rear group are matched and arranged to have respective emphasis, so that the imaging quality of the optical imaging system is improved.
In an exemplary embodiment, the first lens may have a negative optical power, and the object-side surface of the first lens may be a convex surface; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power; the sixth lens may have a positive optical power. The low-order aberration of the control system is effectively balanced by reasonably controlling the positive and negative distribution of the focal power of each component of the system and the lens surface curvature.
In exemplary embodiments, the optical imaging system of the present application may satisfy the conditional expression tan (FOV/2)/TT L > 1.0mm-1Where FOV is the maximum field angle of the optical imaging system and TT L is the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the optical imaging system more specifically, FOV and TT L may satisfy 1.2mm-1＜tan(FOV/2)/TTL＜1.8mm-1. Controlling the maximum field angle and the optical length of the optical imaging system enables the optical imaging system to have a short length along the optical axis while having an ultra-wide angle characteristic.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.9 ≦ CT1/CT4 < 1.5, where CT1 is a central thickness of the first lens on the optical axis and CT4 is a central thickness of the fourth lens on the optical axis. More specifically, CT1 and CT4 satisfy 0.92 ≦ CT1/CT4 < 1.33. The ratio of the center thickness of the first lens to the center thickness of the fourth lens is controlled, so that the focusing of the optical imaging system on the light beam is facilitated, the spherical aberration and the coma aberration of the optical imaging system are reduced, 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 2.5 < f1/f2 < 8.0, where f1 is an effective focal length of the first lens and f2 is an effective focal length of the second lens. More specifically, f1 and f2 satisfy 2.7 < f1/f2 < 7.8. By controlling the ratio of the focal power of the first lens to the focal power of the second lens, the optical imaging system can realize the ultra-wide angle characteristic, and the first lens has better processability.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression-0.3 < f/f1 < 0, 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-0.23 < f/f1 < -0.05. By controlling the ratio of the effective focal length of the optical imaging system to the effective focal length of the first lens, the front group can better keep the negative focal power characteristic, and meanwhile, the super-wide-angle field of view can be effectively shared.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0 < f/f3 < 0.4, where f is an effective focal length of the optical imaging system, and f3 is an effective focal length of the third lens. More specifically, f and f3 can satisfy 0.10 < f/f3 < 0.35. The ratio of the effective focal length of the optical imaging system to the effective focal length of the third lens is controlled, so that light beams can be effectively converged, the field curvature and distortion of the optical imaging system are reduced, 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 1.4 ≦ f6/f4 < 2.5, where f4 is an effective focal length of the fourth lens and f6 is an effective focal length of the sixth lens. More specifically, f4 and f6 satisfy 1.45 ≦ f6/f4 < 2.25. The ratio of the effective focal length of the sixth lens to the effective focal length of the fourth lens is controlled, so that the rear group has better convergence capacity for light, the field curvature of the system is effectively reduced, 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 N1 ≧ 1.70, where N1 is the refractive index of the first lens. Illustratively, the material of the first lens is glass. By controlling the refractive index of the first lens, the first lens can be made to effectively share the ultra-wide field of view. Simultaneously, select for use glass material to make first lens, can make first lens have better processing nature and be favorable to keeping the intensity of first lens.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0 < f45/f3 < 1.5, where f45 is a combined focal length of the fourth lens and the fifth lens, and f3 is an effective focal length of the third lens. More specifically, f45 and f3 satisfy 0.2 < f45/f3 < 1.3. The combined focal length of the matched fourth lens and the matched fifth lens is matched with the focal power of the third lens, so that chromatic aberration of the optical imaging system can be eliminated, and the performance of the optical imaging system can be improved.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 1.0 < T23/T12 < 2.0, where T23 is a separation distance of the second lens and the third lens on the optical axis, and T12 is a separation distance of the first lens and the second lens on the optical axis. More specifically, T23 and T12 satisfy 1.23 < T23/T12 < 1.89. The ratio of the air intervals on the two sides of the second lens is controlled, so that the assembly of the first lens, the second lens and the third lens is facilitated, the optical imaging system is convenient to manufacture, the integral aberration of the optical imaging system is further 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 | (R7+ R8)/(R7-R8) | ≦ 0.1, where R7 is a radius of curvature of the object-side surface of the fourth lens, and R8 is a radius of curvature of the image-side surface of the fourth lens. More specifically, R7 and R8 can satisfy | (R7+ R8)/(R7-R8) | ≦ 0.09. By controlling the two mirror surfaces of the fourth lens to satisfy the conditional expression, the object side surface and the image side surface of the fourth lens can be matched, the focal power of the fourth lens is balanced, and the focus of a rear group on a light beam is facilitated.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression f/R11 ≦ 1.0, where f is an effective focal length of the optical imaging system, and R11 is a radius of curvature of an object-side surface of the sixth lens. More specifically, f and R11 can satisfy 0.80. ltoreq. f/R11. ltoreq.0.99. By controlling the ratio of the effective focal length of the optical imaging system to the radius of curvature of the object-side surface of the sixth lens, the optical powers of the lenses located in the object-side direction of the sixth lens can be balanced, and axial chromatic aberration and spherical aberration of the optical imaging system can be eliminated.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression of 0.7 ≦ SAG12/ET1 < 1.3, where SAG12 is an on-axis distance from an intersection of an image-side surface of the first lens and the optical axis to a vertex of a maximum effective half aperture of the image-side surface of the first lens, and ET1 is an edge thickness at the maximum effective half aperture of the first lens. More specifically, SAG12 and ET1 can satisfy 0.71 ≦ SAG12/ET1 < 1.27. By controlling the ratio of the rise of the image-side surface of the first lens to the edge thickness, the first lens can have better processability, and the first lens can share the super-wide field of view.
In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional expression 0.8 ≦ SAG22/R4 < 1.0, where SAG22 is an on-axis distance from an intersection of the image-side surface of the second lens and the optical axis to a maximum effective half-aperture vertex of the image-side surface of the second lens, and R4 is a radius of curvature of the image-side surface of the second lens. More specifically, SAG22 and R4 can satisfy 0.81 ≦ SAG22/R4 < 0.95. By controlling the ratio of the rise of the image side surface of the second lens to the curvature radius, the off-axis aberration of the optical imaging system can be effectively corrected, and the second lens can share the super-wide field of view.
In an exemplary embodiment, the optical imaging system may further include at least one diaphragm. The stop may be provided at an appropriate position as required, for example, between the third lens and the fourth 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 performances such as miniaturization, ultra-wide angle and high resolution.
In the embodiment of the present application, one mirror surface of at least one lens is an aspheric mirror surface, and for example, the image side surface of the sixth lens is an aspheric 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. In an exemplary embodiment of the present application, any one or both of the object-side surface and the image-side surface of the first lens may be a spherical surface, and at least one of the object-side surface and the image-side surface of each of the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be an aspherical mirror surface. Optionally, each of the 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 third lens E3, a stop STO, 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 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 positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 166.0 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the second lens E2 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 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 S3 to S12 in example 14、A6、A8、A10、A12、A14And A16。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S3 | -3.3063E-02 | 4.2630E-02 | -2.1838E-02 | 5.6837E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 6.9420E-02 | -1.1372E+00 | 9.0197E+00 | -3.7025E+01 | 8.1495E+01 | -7.4836E+01 | 0.0000E+00 |
| S5 | -5.0092E-01 | -4.3700E-01 | -7.9651E-01 | 2.8879E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -6.4018E-01 | -1.9718E+00 | 4.3719E+01 | -2.5708E+02 | 7.4755E+02 | -8.4529E+02 | 0.0000E+00 |
| S7 | -2.4763E-01 | -1.7011E+00 | 2.9821E+01 | -1.5349E+02 | 2.4931E+02 | 0.0000E+00 | 0.0000E+00 |
| S8 | -5.0852E-01 | -4.3497E+00 | 6.6689E+01 | -2.7325E+02 | 3.9428E+02 | 0.0000E+00 | 0.0000E+00 |
| S9 | -2.8678E-02 | -7.8071E+00 | 3.0495E+01 | 2.4379E+02 | -2.6790E+03 | 8.7700E+03 | -9.6853E+03 |
| S10 | -4.7011E-01 | 3.2734E+00 | -1.5844E+01 | 5.5906E+01 | -1.5097E+02 | 2.5341E+02 | -1.7835E+02 |
| S11 | -1.7866E-01 | 1.4226E+00 | -6.0892E+00 | 1.5383E+01 | -2.4670E+01 | 1.9957E+01 | -5.5561E+00 |
| S12 | -3.0350E-01 | 2.6986E-01 | -1.8157E-01 | -2.6469E-01 | -1.8716E-01 | 2.4297E-01 | 0.0000E+00 |
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 an f- θ 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 relative illuminance curve of the optical imaging system of embodiment 1, which represents the relative illuminance corresponding to different angles of view. 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 third lens E3, a stop STO, 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 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 concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 162.0 °.
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/distance, 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
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 an f- θ 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 relative illuminance curve of the optical imaging system of embodiment 2, which represents the relative illuminance corresponding to different angles of view. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a third lens E3, a stop STO, 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 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 positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 166.0 °.
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/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 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 |
| S3 | 3.8587E-02 | -3.1257E-03 | -3.5309E-03 | 1.7511E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 9.1901E-02 | -1.6137E+00 | 1.4303E+01 | -6.2131E+01 | 1.4535E+02 | -1.4206E+02 | 0.0000E+00 |
| S5 | -5.3766E-01 | -2.8874E-01 | -2.4445E+00 | 5.4422E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -8.7653E-01 | -1.6036E+00 | 5.3539E+01 | -3.5449E+02 | 1.1510E+03 | -1.4381E+03 | 0.0000E+00 |
| S7 | -3.1283E-01 | -2.4982E+00 | 5.0159E+01 | -2.7232E+02 | 5.0854E+02 | 0.0000E+00 | 0.0000E+00 |
| S8 | -3.3844E-01 | -1.4305E+01 | 1.5819E+02 | -6.5164E+02 | 9.8455E+02 | 0.0000E+00 | 0.0000E+00 |
| S9 | -1.9213E-01 | -1.6752E+01 | 1.3751E+02 | -3.0712E+02 | -1.3939E+03 | 7.7437E+03 | -9.8990E+03 |
| S10 | -8.3202E-01 | 5.3429E+00 | -2.0663E+01 | 6.0084E+01 | -1.4900E+02 | 2.5432E+02 | -1.8773E+02 |
| S11 | -4.2102E-01 | 2.7643E+00 | -1.3560E+01 | 4.2554E+01 | -8.6808E+01 | 9.8202E+01 | -4.5055E+01 |
| S12 | -2.3040E-01 | 1.0314E-02 | -8.1335E-02 | -2.5913E-01 | -1.8716E-01 | 2.4297E-01 | 0.0000E+00 |
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 an f- θ 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 relative illuminance curve of the optical imaging system of example 3, which represents the relative illuminance corresponding to different angles of view. 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 third lens E3, a stop STO, 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 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 166.0 °.
Table 7 shows a basic parameter table of the optical imaging system of example 4 in which the units of the radius of curvature, thickness/distance, and 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
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S3 | 6.3783E-02 | -1.9700E-02 | 8.9856E-04 | 1.7603E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 9.0404E-02 | -1.0554E+00 | 1.0187E+01 | -4.0308E+01 | 8.6659E+01 | -8.3481E+01 | 0.0000E+00 |
| S5 | -5.1877E-01 | -5.7249E-02 | -3.2297E+00 | 5.6705E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.1784E+00 | -5.4388E+00 | 1.7384E+02 | -1.5557E+03 | 6.7110E+03 | -1.0857E+04 | 0.0000E+00 |
| S7 | -4.8428E-01 | -1.8452E+00 | 5.0689E+01 | -2.8261E+02 | 5.7099E+02 | 0.0000E+00 | 0.0000E+00 |
| S8 | 4.5894E-01 | -2.8160E+01 | 2.5141E+02 | -9.5644E+02 | 1.4160E+03 | 0.0000E+00 | 0.0000E+00 |
| S9 | 4.1115E-01 | -3.6135E+01 | 2.8992E+02 | -1.0014E+03 | 7.6911E+02 | 3.3360E+03 | -5.9569E+03 |
| S10 | -3.1596E-01 | -4.7196E+00 | 5.2634E+01 | -2.3903E+02 | 5.6556E+02 | -6.9377E+02 | 3.5257E+02 |
| S11 | -4.5703E-01 | 2.3797E+00 | -8.7151E+00 | 2.1831E+01 | -3.9453E+01 | 4.0158E+01 | -1.6021E+01 |
| S12 | -2.6277E-01 | 9.4512E-02 | -8.9274E-02 | -2.8862E-01 | -1.8716E-01 | 2.4297E-01 | 0.0000E+00 |
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 an f- θ 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 relative illuminance curve of the optical imaging system of example 4, which represents the relative illuminance corresponding to different angles of view. 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 third lens E3, a stop STO, 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 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 positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 163.4 °.
Table 9 shows a basic parameter table of the optical imaging system of example 5 in which the units of the radius of curvature, thickness/distance, and 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 |
| S3 | -1.4543E-01 | 1.6503E-01 | -8.6791E-02 | 1.7865E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.0338E-02 | -1.8031E+00 | 1.8847E+01 | -9.1862E+01 | 2.4905E+02 | -2.6804E+02 | 0.0000E+00 |
| S5 | -5.6689E-01 | 1.3548E-02 | -7.8068E-01 | 2.4917E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.0136E+00 | 4.0976E+00 | -1.6359E+01 | 7.0726E+01 | -1.8674E+02 | 2.1197E+02 | 0.0000E+00 |
| S7 | -4.7974E-01 | 3.0942E+00 | -8.7963E+00 | 8.1916E+00 | 9.6497E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -3.5535E-01 | -2.8952E+00 | 4.2181E+01 | -1.5225E+02 | 2.0351E+02 | 0.0000E+00 | 0.0000E+00 |
| S9 | -6.6132E-02 | -6.9785E+00 | 2.6452E+01 | 1.4399E+02 | -1.5091E+03 | 4.4626E+03 | -4.4524E+03 |
| S10 | -1.3659E-01 | -1.3524E-01 | 2.3406E+00 | 3.1395E+00 | -5.9417E+01 | 1.5429E+02 | -1.2305E+02 |
| S11 | -9.8020E-02 | -1.9932E-01 | 2.4857E+00 | -1.1025E+01 | 2.4806E+01 | -3.3962E+01 | 2.1003E+01 |
| S12 | -3.1080E-01 | 3.1800E-01 | -1.4807E-01 | -2.3184E-01 | -1.8290E-01 | 2.3643E-01 | 0.0000E+00 |
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 an f- θ 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 relative illuminance curve of the optical imaging system of example 5, which represents the relative illuminance corresponding to different angles of view. 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 third lens E3, a stop STO, 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 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 concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 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 0.74mm, 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 5.00mm, and the value of the maximum field angle FOV is 167.0 °.
Table 11 shows a basic parameter table of the optical imaging system of example 6 in which the units of the radius of curvature, thickness/distance, and 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
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 an f- θ 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 relative illuminance curve of the optical imaging system of example 6, which represents the relative illuminance corresponding to different angles of view. As can be seen from fig. 12A to 12D, 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 14D. 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 third lens E3, a stop STO, 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 negative power, and has a concave 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 convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In embodiment 7, the value of the effective focal length f of the optical imaging system is 0.74mm, the value of the on-axis distance TT L from the object-side face S1 to the imaging face S15 of the first lens E1 is 5.00mm, and the value of the maximum field angle FOV is 166.4 °.
Table 13 shows a basic parameter table of the optical imaging system of example 7 in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 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.
Watch 13
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S3 | 9.4005E-02 | -4.1400E-02 | 9.9056E-03 | -3.2948E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 5.2086E-02 | -4.6798E-01 | 6.4141E+00 | -2.3507E+01 | 4.8860E+01 | -4.8933E+01 | 0.0000E+00 |
| S5 | -5.5030E-01 | 6.4517E-02 | -2.8035E+00 | 4.7626E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -7.8918E-01 | -4.1079E+00 | 8.7605E+01 | -6.0753E+02 | 2.1139E+03 | -2.8545E+03 | 0.0000E+00 |
| S7 | -2.7176E-01 | -2.2711E+00 | 4.2778E+01 | -2.1549E+02 | 3.6995E+02 | 0.0000E+00 | 0.0000E+00 |
| S8 | -7.0420E-01 | -7.6138E+00 | 1.0506E+02 | -4.4648E+02 | 6.7225E+02 | 0.0000E+00 | 0.0000E+00 |
| S9 | -1.4574E+00 | -6.7221E+00 | 7.8527E+01 | -2.0997E+02 | -4.3174E+02 | 2.0835E+03 | -5.5000E+02 |
| S10 | -7.0488E-01 | 2.5966E+00 | -3.1249E+00 | -8.5308E+00 | 1.4710E+01 | 2.5066E+01 | -4.3468E+01 |
| S11 | -4.2342E-01 | 2.8056E+00 | -1.1524E+01 | 2.8802E+01 | -4.4591E+01 | 3.5187E+01 | -9.9814E+00 |
| S12 | -2.0922E-01 | 1.0230E-01 | -9.0730E-02 | -2.9367E-01 | -1.8716E-01 | 2.4297E-01 | 0.0000E+00 |
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging system of example 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of embodiment 7. Fig. 14C shows an f- θ distortion curve of the optical imaging system of embodiment 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a relative illuminance curve of the optical imaging system of example 7, which represents the relative illuminance corresponding to different angles of view. As can be seen from fig. 14A to 14D, 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 16D. 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 third lens E3, a stop STO, 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 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 positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The optical filter E7 has an object side surface S13 and an image side surface S14, and the optical imaging system has an imaging surface S15. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In embodiment 8, the value of the effective focal length f of the optical imaging system is 0.75mm, the value of the on-axis distance TT L from the object-side face S1 to the imaging face S15 of the first lens E1 is 5.00mm, and the value of the maximum field angle FOV is 166.0 °.
Table 15 shows a basic parameter table of the optical imaging system of example 8 in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 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.
Watch 15
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S3 | 3.2367E-03 | -7.9475E-02 | 5.1288E-02 | -1.0865E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 6.0676E-01 | -1.6495E+00 | 1.4924E+01 | -6.1757E+01 | 1.4455E+02 | -1.4541E+02 | 0.0000E+00 |
| S5 | -4.6627E-01 | -1.9803E-01 | 3.3472E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.1743E+00 | 3.5573E+00 | -7.3212E+00 | 2.6280E+01 | -8.4889E+01 | 1.2472E+02 | 0.0000E+00 |
| S7 | -4.2915E-01 | 2.9737E+00 | -1.4947E+01 | 3.3937E+01 | -2.1808E+01 | 0.0000E+00 | 0.0000E+00 |
| S8 | -1.1140E+00 | 8.2859E+00 | -2.5108E+01 | 3.3639E+01 | -9.3135E-01 | 0.0000E+00 | 0.0000E+00 |
| S9 | -2.3098E+00 | 1.1015E+01 | -4.5823E+01 | 2.0708E+02 | -7.8852E+02 | 1.8199E+03 | -1.7271E+03 |
| S10 | -1.0464E+00 | 4.9497E+00 | -1.8958E+01 | 7.0059E+01 | -1.7736E+02 | 2.4061E+02 | -1.3507E+02 |
| S11 | 9.8219E-01 | -7.5473E+00 | 3.3647E+01 | -1.0377E+02 | 2.0097E+02 | -2.1889E+02 | 1.0188E+02 |
| S12 | -6.3194E-02 | -2.4286E-01 | -2.7122E-01 | 3.8695E-01 | -1.8716E-01 | 2.4297E-01 | 0.0000E+00 |
TABLE 16
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging system of embodiment 8, which represents the convergent focus deviation of light rays of different wavelengths after passing through the system. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging system of example 8. Fig. 16C shows an f- θ distortion curve of the optical imaging system of embodiment 8, which represents distortion magnitude values corresponding to different angles of view. Fig. 16D shows a relative illuminance curve of the optical imaging system of example 8, which represents the relative illuminance corresponding to different angles of view. As can be seen from fig. 16A to 16D, the optical imaging system according to embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 each satisfy the relationship shown in table 17.
| Conditional expression (A) example | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| tan(FOV/2)/TTL(mm-1) | 1.63 | 1.26 | 1.63 | 1.63 | 1.37 | 1.76 | 1.68 | 1.63 |
| CT1/CT4 | 1.16 | 1.10 | 1.31 | 1.32 | 0.92 | 1.31 | 1.23 | 0.95 |
| f1/f2 | 4.76 | 3.38 | 6.63 | 5.97 | 2.75 | 6.23 | 7.75 | 2.79 |
| f/f1 | -0.14 | -0.17 | -0.11 | -0.13 | -0.21 | -0.12 | -0.10 | -0.21 |
| f/f3 | 0.28 | 0.23 | 0.31 | 0.26 | 0.20 | 0.26 | 0.29 | 0.12 |
| f6/f4 | 1.73 | 1.70 | 1.50 | 1.47 | 2.03 | 1.48 | 1.56 | 2.21 |
| N1 | 1.74 | 1.74 | 1.74 | 1.74 | 1.74 | 1.74 | 1.74 | 1.74 |
| f45/f3 | 1.05 | 0.88 | 1.24 | 0.78 | 0.52 | 0.76 | 0.97 | 0.22 |
| T23/T12 | 1.85 | 1.81 | 1.32 | 1.28 | 1.87 | 1.35 | 1.51 | 1.57 |
| |(R7+R8)/(R7-R8)| | 0.01 | 0.01 | 0.08 | 0.09 | 0.06 | 0.09 | 0.05 | 0.03 |
| f/R11 | 0.98 | 0.95 | 0.93 | 0.98 | 0.83 | 0.98 | 0.95 | 0.81 |
| SAG12/ET1 | 1.01 | 1.18 | 1.22 | 1.25 | 0.80 | 1.22 | 1.09 | 0.71 |
| SAG22/R4 | 0.92 | 0.90 | 0.92 | 0.92 | 0.86 | 0.93 | 0.89 | 0.81 |
TABLE 17
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 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 (24)
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 refractive power, an object-side surface of which is convex;
a second lens having a negative optical power;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens having a negative optical power;
a sixth lens having positive optical power;
the distance TT L between the maximum field angle FOV of the optical imaging system and the object side surface of the first lens and the image side surface of the optical imaging system on the optical axis satisfies tan (FOV/2)/TT L > 1.0mm-1；
The central thickness CT1 of the first lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.9 ≦ CT1/CT4 < 1.5.
2. The optical imaging system of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 2.5 < f1/f2 < 8.0.
3. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and an effective focal length f1 of the first lens satisfy-0.3 < f/f1 < 0.
4. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and an effective focal length f3 of the third lens satisfy 0 < f/f3 < 0.4.
5. The optical imaging system of claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens satisfy 1.4 ≦ f6/f4 < 2.5.
6. The optical imaging system of claim 1, wherein the first lens is made of glass, and the refractive index N1 of the first lens satisfies N1 ≥ 1.70.
7. The optical imaging system of claim 1, wherein a combined focal length f45 of the fourth lens and the fifth lens and an effective focal length f3 of the third lens satisfy 0 < f45/f3 < 1.5.
8. The optical imaging system according to claim 1, wherein a separation distance T23 of the second lens and the third lens on the optical axis and a separation distance T12 of the first lens and the second lens on the optical axis satisfy 1.0 < T23/T12 < 2.0.
9. The optical imaging system of claim 1, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy | (R7+ R8)/(R7-R8) | ≦ 0.1.
10. The optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and a radius of curvature R11 of an object-side surface of the sixth lens satisfy f/R11 ≦ 1.0.
11. The optical imaging system of any one of claims 1 to 10, wherein an on-axis distance SAG12 from an intersection point of the image-side surface of the first lens and the optical axis to a maximum effective semi-aperture vertex of the image-side surface of the first lens and an edge thickness ET1 of the first lens satisfy 0.7 ≦ SAG12/ET1 < 1.3.
12. The optical imaging system according to any one of claims 1 to 10, wherein an on-axis distance SAG22 from an intersection point of the image-side surface of the second lens and the optical axis to a maximum effective semi-aperture vertex of the image-side surface of the second lens and a radius of curvature R4 of the image-side surface of the second lens satisfy 0.8 ≦ SAG22/R4 < 1.0.
13. 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 refractive power, an object-side surface of which is convex;
a second lens having a negative optical power;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens having a negative optical power;
a sixth lens having positive optical power;
the distance TT L between the maximum field angle FOV of the optical imaging system and the object side surface of the first lens and the image side surface of the optical imaging system on the optical axis satisfies tan (FOV/2)/TT L > 1.0mm-1；
A separation distance T23 of the second lens and the third lens on the optical axis and a separation distance T12 of the first lens and the second lens on the optical axis satisfy 1.0 < T23/T12 < 2.0.
14. The optical imaging system of claim 13, wherein the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 2.5 < f1/f2 < 8.0.
15. The optical imaging system of claim 13, wherein an effective focal length f of the optical imaging system and an effective focal length f1 of the first lens satisfy-0.3 < f/f1 < 0.
16. The optical imaging system of claim 13, wherein an effective focal length f of the optical imaging system and an effective focal length f3 of the third lens satisfy 0 < f/f3 < 0.4.
17. The optical imaging system of claim 16, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.9 ≦ CT1/CT4 < 1.5.
18. The optical imaging system of claim 13, wherein an effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens satisfy 1.4 ≦ f6/f4 < 2.5.
19. The optical imaging system of claim 13, wherein the first lens is made of glass, and the refractive index N1 of the first lens satisfies N1 ≥ 1.70.
20. The optical imaging system of claim 13, wherein a combined focal length f45 of the fourth lens and the fifth lens and an effective focal length f3 of the third lens satisfy 0 < f45/f3 < 1.5.
21. The optical imaging system of claim 13, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy | (R7+ R8)/(R7-R8) | ≦ 0.1.
22. The optical imaging system of claim 13, wherein an effective focal length f of the optical imaging system and a radius of curvature R11 of an object-side surface of the sixth lens satisfy f/R11 ≦ 1.0.
23. The optical imaging system of any one of claims 13 to 22, wherein an on-axis distance SAG12 from an intersection of the image-side surface of the first lens and the optical axis to a maximum effective semi-aperture vertex of the image-side surface of the first lens and an edge thickness ET1 of the first lens satisfy 0.7 ≦ SAG12/ET1 < 1.3.
24. The optical imaging system of any one of claims 13 to 22, wherein an on-axis distance SAG22 from an intersection point of the image-side surface of the second lens and the optical axis to a maximum effective semi-aperture vertex of the image-side surface of the second lens and a radius of curvature R4 of the image-side surface of the second lens satisfy 0.8 ≦ SAG22/R4 < 1.0.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426826A (en) * | 2019-08-12 | 2019-11-08 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN113281876A (en) * | 2021-04-28 | 2021-08-20 | 江西晶超光学有限公司 | Optical system, camera module, electronic equipment and automobile |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426826A (en) * | 2019-08-12 | 2019-11-08 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN110426826B (en) * | 2019-08-12 | 2024-06-04 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN113281876A (en) * | 2021-04-28 | 2021-08-20 | 江西晶超光学有限公司 | Optical system, camera module, electronic equipment and automobile |
| CN113281876B (en) * | 2021-04-28 | 2024-01-09 | 江西欧菲光学有限公司 | Optical system, camera module, electronic equipment and car |
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