CN210015289U - Combined zoom double-camera lens - Google Patents
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- CN210015289U CN210015289U CN201920799087.1U CN201920799087U CN210015289U CN 210015289 U CN210015289 U CN 210015289U CN 201920799087 U CN201920799087 U CN 201920799087U CN 210015289 U CN210015289 U CN 210015289U
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Abstract
The application discloses a combined zoom double-lens, which comprises a first lens group and a second lens group, wherein the angle of view of the second lens group is larger than that of the first lens group, and the thickness of the second lens group is smaller than that of the first lens group; and the total effective focal length f of the first lens groupTTotal effective focal length f of the second lens groupWSatisfy fT/fW＞9.00。
Description
Technical Field
The present invention relates to a combined zoom bi-camera lens, and more particularly, to a combined zoom bi-camera lens including a wide angle lens group and a telephoto lens group.
Background
With the rapid development of the mobile phone industry, people have increasingly stringent requirements on the imaging quality and other photographing functions of portable electronic equipment. The single-shot lens of the common mobile phone can further improve the image quality by only increasing the number of the lenses, however, the increase of the number of the lenses is obviously not beneficial to the miniaturization of the lens, and the market demand is difficult to meet. In addition, unlike the random zooming of professional photographing equipment such as a single lens reflex, the conventional optical zooming usually involves the mechanical movement of the lens group, which results in the increase of the total length of the lens, and cannot meet the current trend of ultra-thinning.
Therefore, how to combine the current wide-angle and telephoto dual cameras to achieve the optical zoom of the portable device without affecting the thickness of the portable device is one of the problems to be solved in the art.
SUMMERY OF THE UTILITY MODEL
The present application provides a combined zoom bi-lens, such as a combined zoom bi-lens having high power zoom characteristics, that may address at least one of the above-mentioned shortcomings in the prior art.
The present application provides a combined zoom bi-lens including a first lens group and a second lens group, wherein a field angle of the second lens group is larger than a field angle of the first lens group, and a thickness of the second lens group is smaller than a thickness of the first lens group.
In one embodiment, the total effective focal length f of the first lens groupTTotal effective focal length f of the second lens groupWCan satisfy fT/fW＞9.00。
In one embodiment, the combined zoom bi-lens has an overall thickness T and ImgH that is half the diagonal length of the effective pixel area on the imaging surface of the first lens groupTCan satisfy T/ImgH of more than 2.00T＜3.00。
In one embodiment, the first lens group includes at least a first lens closest to the object side; the second lens group includes at least a first lens closest to the object side; and the object side surface of the first lens group is arranged on the imaging surface of the first lens groupDistance TTL on optical axis of first lens groupTTTL (distance to tube) from the object side surface of the first lens of the second lens group to the imaging surface of the second lens group on the optical axis of the second lens groupWCan satisfy TTL of 1.00 <T/TTLW＜1.50。
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the first lens groupTImgH which is half of the diagonal length of the effective pixel area on the imaging surface of the second lens groupWCan satisfy ImgH of more than 1.00T/ImgHW＜2.00。
In one embodiment, the first lens group, in order from an object side to an image plane of the first lens group along an optical axis of the first lens group, includes: the first lens with positive focal power, its object side can be the convex surface; the image side surface of the second lens can be a concave surface; a third lens having a refractive power, the object side surface of which may be convex; a fourth lens having an optical power; and a fifth lens having a refractive power, the object side surface of which may be convex. Optionally, a distance TTL between an object side surface of the first lens group and an imaging surface of the first lens group on an optical axis of the first lens groupTTotal effective focal length f from the first lens groupTCan satisfy TTLT/fTIs less than 1.00. Optionally, a radius of curvature R4 of an image-side surface of the second lens of the first lens groupTRadius of curvature R5 from the object-side surface of the third lens of the first lens groupTCan satisfy R4 of 1.00 <T/R5TIs less than 2.50. Optionally, the total effective focal length f of the first lens groupTRadius of curvature R1 from the object side surface of the first lens groupTCan satisfy f is more than 3.50T/R1TIs less than 4.50. Optionally, the fourth lens and the fifth lens of the first lens group are separated by a distance T45 on the optical axis of the first lens groupTA distance TTL from an object side surface of a first lens of the first lens group to an image plane of the first lens group on an optical axis of the first lens groupTCan satisfy 2.00 < (10 XT 45)T)/TTLTIs less than 3.00. Optionally, an effective focal length f1 of the first lens groupTWith the object side surface of the second lens of the first lens group and the first lensOn-axis distance SAG21 between intersection point of optical axes of the groups to effective radius vertex of object side of second lensTCan satisfy the condition that f is more than 20.00 and less than 1T/SAG21T＜35.00。
In one embodiment, the second lens group, in order from an object side to an image plane of the second lens group along an optical axis of the second lens group, comprises: a first lens having a negative optical power; a second lens having positive optical power, the object side surface of which may be convex; a third lens having optical power; the image side surface of the fourth lens can be a concave surface; and a fifth lens having a positive optical power. Optionally, a Semi-FOV of a maximum field angle of the second lens groupWCan satisfy Semi-FOVWIs greater than 63.0 degrees. Optionally, ImgH which is half of the diagonal length of the effective pixel area on the imaging surface of the second lens groupWA center thickness CT2 on an optical axis of the second lens group with the second lens of the second lens groupWCan satisfy 4.00 < (10 x CT 2)W)/ImgHW＜6.00。
In one embodiment, a spacing distance t between the first lens group and the second lens group satisfies 0.50mm < t < 3.00 mm.
This application makes above-mentioned combination formula zoom and take a photograph camera lens at least has such beneficial effect through set up two different lens groups in combination formula zoom and take a photograph of a camera lens to through the focal power of each lens in two lens groups, face type, the central thickness of each lens and the epaxial interval between each lens etc. of rational distribution: by combining the two different lens groups into a single double-shot lens, the combined zoom double-shot lens can achieve the high-power mixed optical zoom effect by alternately using different camera shooting modes while ensuring the miniaturization and high imaging quality of the combined zoom double-shot lens, for example, the optical zoom multiple can reach more than 5 times, thereby realizing a good zoom and telephoto function.
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 structural view of a telephoto lens group according to embodiment 1 of the present application;
fig. 2A to 2C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the telephoto lens group of example 1;
FIG. 3 is a schematic view showing the structure of a telephoto lens group according to embodiment 2 of the present application;
fig. 4A to 4C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the telephoto lens group of example 2;
FIG. 5 is a schematic view showing the structure of a telephoto lens group according to embodiment 3 of the present application;
fig. 6A to 6C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the telephoto lens group of embodiment 3;
FIG. 7 is a schematic diagram showing the structure of a wide angle lens group according to embodiment 4 of the present application;
fig. 8A to 8C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the wide-angle lens group of example 4;
FIG. 9 is a schematic diagram showing the structure of a wide angle lens group according to embodiment 5 of the present application;
fig. 10A to 10C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the wide-angle lens group of example 5;
FIG. 11 is a schematic view showing the structure of a wide angle lens group according to embodiment 6 of the present application;
fig. 12A to 12C show an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the wide-angle lens group of example 6; and
fig. 13 shows a schematic configuration diagram of a combined zoom bi-lens according to the present application.
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.
A combined zoom double-lens according to an exemplary embodiment of the present application may include a first lens group and a second lens group, wherein a field angle of the second lens group may be larger than a field angle of the first lens group, and a thickness of the second lens group may be smaller than a thickness of the first lens group. For example, the second lens group may be a thin lens group having a large angle of view.
In an exemplary embodiment, the first lens group may be a telephoto lens group having a telephoto characteristic (with respect to the second lens group), and the second lens group may be a wide angle lens group having a wide angle characteristic (with respect to the first lens group). The long-focus lens group and the wide-angle lens group are alternately used in the shooting process of the combined zoom double-shot lens, so that the effect of mixed optical zooming is achieved, and the development of the nondestructive zooming technology of the combined zoom double-shot lens carried by a mobile phone is promoted.
In an exemplary embodiment, the combined zoom bi-lens of the present application may satisfy the conditional expression fT/fW> 9.00, wherein fTIs the total effective focal length of the telephoto lens group, fWThe total effective focal length of the wide angle lens group. More specifically, see tables 3 and 7 below, select fT7.11mm long focus lens group and fWSuch a combination of 0.72mm wide angle lens group may be such that fTAnd fWFurther can satisfy fT/fWNot less than 9.88. Satisfies the conditional expression fT/fW＞900, the optical zooming of the whole combined zooming double-shot lens can reach more than 5 times, so that the combined zooming double-shot lens has a good zooming and telephoto function.
In an exemplary embodiment, the combined zoom telephoto lens of the present application may satisfy the conditional expression 2.00 < T/ImgHTLess than 3.00, wherein T is the whole thickness of the combined zoom double-shot lens, ImgHTIs half of the diagonal length of the effective pixel area on the imaging surface of the telephoto lens group. More specifically, T and ImgHTFurther satisfies the requirement of T/ImgH of 2.50 & ltT< 3.00, e.g. 2.63 ≦ T/ImgHTLess than or equal to 2.96. Satisfies the conditional expression of T/ImgH of 2.00 & ltTAnd the thickness is less than 3.00, the whole thickness of the combined zoom double-shot lens can be effectively controlled, and the combined zoom double-shot lens is beneficial to realizing ultrathin characteristics and high pixel characteristics. In general, the total length of the telephoto lens group is longer than that of the wide angle lens group, and thus, in this document, the overall thickness T of the combined zoom bi-lens system can be understood as the thickness of the telephoto lens group, i.e., the distance TTL between the object-side surface of the first lens of the telephoto lens group and the imaging surface of the telephoto lens group on the optical axis of the telephoto lens groupT。
In an exemplary embodiment, the combined zoom bi-camera lens of the present application may satisfy the conditional expression 1.00 < TTLT/TTLW< 1.50, wherein TTLTDistance from the object side surface of the first lens of the telephoto lens group to the imaging surface of the telephoto lens group on the optical axis of the telephoto lens group, TTLWThe distance from the object side surface of the first lens of the wide-angle lens group to the imaging surface of the wide-angle lens group on the optical axis of the wide-angle lens group. More specifically, TTLTAnd TTLWFurther, 1.20 < TTL can be satisfiedT/TTLW< 1.40, e.g. 1.30 ≦ TTLT/TTLWLess than or equal to 1.36. Satisfy the conditional expression 1.00 < TTLT/TTLWLess than 1.50, the total length difference of the long-focus lens group and the wide-angle lens group is in a reasonable range, and the assembly of the module is convenient.
In an exemplary embodiment, the combined zoom telephoto lens of the present application may satisfy the conditional expression 1.00 < ImgHT/ImgHW< 2.00, wherein ImgHTIs half of the diagonal length of the effective pixel area on the imaging surface of the long-focus lens group, ImgHWIs half of the diagonal length of the effective pixel area on the imaging surface of the wide-angle lens group. More specifically, ImgHTAnd ImgHWFurther can satisfy ImgH of 1.50 <T/ImgHW< 1.70, e.g. 1.53. ltoreq. ImgHT/ImgHWLess than or equal to 1.69. Satisfies the conditional expression 1.00 & lt ImgHT/ImgHWLess than 2.00, the difference between the specifications of the chips matched with the long-focus lens group and the wide-angle lens group is in a reasonable range, and a user can be ensured to have good shooting effect experience.
Fig. 13 is a schematic structural diagram of a combined zoom bi-lens including a telephoto lens group and a wide angle lens group according to the present application, in which a separation distance t between the telephoto lens group and the wide angle lens group can be adjusted as needed during production and assembly processes, so that an imaging effect of the zoom bi-lens is optimized, and remains unchanged during use of the zoom bi-lens (e.g., during an image capturing process after assembly). In an exemplary embodiment, a spacing distance t between the telephoto lens group and the wide angle lens group may satisfy the conditional expression 0.5mm < t < 3.00 mm. The condition that t is more than 0.5mm and less than 3.00mm is satisfied, mutual light blocking between the telephoto lens group and the wide-angle lens group can be effectively avoided, so that light entering of the telephoto lens group and the wide-angle lens group are not influenced by each other, and simultaneously, the two lens groups are smoothly in zooming transition to realize the optimal imaging effect.
In an exemplary embodiment, the tele lens group and the wide lens group may be located on the same side of the combined zoom bi-lens to enable both to capture objects located at the same side of the combined zoom bi-lens (e.g., in front of or behind the combined zoom bi-lens).
In an exemplary embodiment, the telephoto lens group and the wide angle lens group may be arranged longitudinally or transversely on one side of the combined zoom double lens. The long-focus lens group and the wide-angle lens group are adjacent to each other through longitudinal arrangement or transverse arrangement, so that on one hand, chips arranged in the combined zoom double-lens are arranged regularly, and arrangement and wiring of internal elements are easier; and on the other hand can increase pleasing to the eye degree in the outward appearance to be more convenient for the user to hold the equipment and take a picture and can not make the user excessively consider whether having sheltered from a certain camera because of holding the improper posture. It is to be understood that "longitudinal alignment" is to be understood as an up-down alignment mode of the telephoto lens group and the wide angle lens group with respect to the use direction of the combined zoom telephoto lens, and "lateral alignment" is to be understood as a left-right alignment mode of the telephoto lens group and the wide angle lens group with respect to the use direction of the combined zoom telephoto lens. Meanwhile, it should be understood that the arrangement of the telephoto lens group and the wide angle lens group is not limited thereto, and the relative positions thereof may be adjusted according to actual design requirements.
In an exemplary embodiment, the telephoto lens group and the wide angle lens may further include an electron photosensitive element, which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS), on their respective imaging surfaces to image. In addition, the combined zoom bi-lens described in the present application may be an imaging apparatus (a separate imaging device such as a digital camera) that can be used separately, or may be an imaging module mounted on a portable electronic device.
A telephoto lens group and a wide angle lens group suitable for the combined zoom double-lens system according to the present application will be described in detail below.
Long focus lens group
The telephoto lens group according to the present application may include, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are arranged in order from an object side to an image side along an optical axis. Any two adjacent lenses of the first lens to the fifth lens of the telephoto lens group may have an air space therebetween.
In an exemplary embodiment, in the telephoto lens group, the first lens may have positive optical power, and the object-side surface thereof may be a convex surface; the second lens has positive focal power or negative focal power, the image side surface of the second lens can be a concave surface, the third lens has positive focal power or negative focal power, and the object side surface of the third lens can be a convex surface; the fourth lens has positive focal power or negative focal power; the fifth lens has positive power or negative power, and the object side surface of the fifth lens can be a convex surface.
In an exemplary embodiment, an image side surface of the third lens of the telephoto lens group may be a concave surface.
In an exemplary embodiment, the fourth lens of the tele lens group may have a negative power, and the object-side surface thereof may be concave.
In an exemplary embodiment, the combined zoom bi-camera lens of the present application may satisfy a conditional TTLT/fT< 1.00, wherein TTLTIs the distance from the object side surface of the first lens of the telephoto lens group to the imaging surface of the telephoto lens group on the optical axis of the telephoto lens group, fTThe total effective focal length of the tele lens group. More specifically, TTLTAnd fTFurther, it can satisfy 0.80 < TTLT/fT< 0.90, e.g. 0.81 ≦ TTLT/fTLess than or equal to 0.84. Pass through and satisfy conditional TTLT/fTLess than 1.00, and can effectively ensure that the long-focus lens group has better telephoto function.
In an exemplary embodiment, the combined zoom bi-lens of the present application may satisfy the conditional expression 1.00 < R4T/R5T< 2.50, wherein R4TRadius of curvature of the image-side surface of the second lens of the telephoto lens group, R5TThe radius of curvature of the object-side surface of the third lens of the telephoto lens group. More specifically, R4TAnd R5TFurther satisfies the condition that R4 is more than 1.00T/R5T< 2.10, e.g. 1.06 ≦ R4T/R5TLess than or equal to 2.05. Satisfies the conditional expression of R4 being more than 1.00T/R5T< 2.50, the spherical aberration contributions of the second lens and the third lens of the telephoto lens group can be effectively controlled within a reasonable range, and the second lens and the third lens have better processability. Alternatively, the object-side surface of the second lens of the tele lens group may be convex.
In an exemplary embodiment, the combined zoom bi-lens of the present application may satisfy the conditional expression 3.50 < fT/R1T< 4.50, wherein fTIs the total effective focal length of the telephoto lens group, R1TObject being the first lens of a telephoto lens groupThe radius of curvature of the side. More specifically, fTAnd R1TFurther satisfies the condition that f is more than 3.60T/R1T< 4.30, e.g. 3.83 ≦ fT/R1TLess than or equal to 4.14. Satisfies the conditional expression of 3.50 < fT/R1T< 4.50, the contribution amount of curvature of field of the object side surface of the first lens can be in a reasonable range, and therefore the curvature of field generated by the rear group lens in the telephoto lens group can be effectively balanced.
In an exemplary embodiment, the combined zoom telephoto lens of the present application may satisfy the conditional expression 2.00 < (10 × T45)T)/TTLT< 3.00, wherein, T45TIs the distance between the fourth lens and the fifth lens of the long focus lens group on the optical axis of the long focus lens group, TTLTIs the distance on the optical axis of the tele lens group from the object side surface of the first lens of the tele lens group to the imaging surface of the tele lens group. More specifically, T45TAnd TTLTFurther satisfies the condition of 2.27 ≦ (10 XT 45)T)/TTLTLess than or equal to 2.90. The axial spacing distance between the fourth lens and the fifth lens of the long-focus lens group is reasonably controlled, so that the miniaturization of the long-focus lens group is facilitated, the thickness sensitivity of the long-focus lens group can be effectively reduced, and the field curvature correction is facilitated.
In an exemplary embodiment, the combined zoom bi-lens of the present application may satisfy the conditional expression 20.00 < f1T/SAG21T< 35.00, wherein f1TSAG21 being the effective focal length of the first lens of the tele lens groupTIs the on-axis distance between the intersection point of the object-side surface of the second lens of the telephoto lens group and the optical axis of the telephoto lens group to the effective radius vertex of the object-side surface of the second lens. More specifically, f1TAnd SAG21TFurther satisfies the condition that f1 is more than or equal to 24.50T/SAG21TLess than or equal to 32.59. Satisfies the conditional expression of 20.00 < f1T/SAG21TLess than 35.00, is beneficial to improving the spherical aberration of the middle field of view and the coma aberration of the edge field of view, so that the long-focus lens group has better aberration correction capability, and meanwhile, the second lens of the long-focus lens group has better processability.
In an exemplary embodiment, the above-described telephoto lens group may further include at least one stop. The stop may be disposed at an appropriate position as needed, for example, between the object side and the first lens. Optionally, the telephoto lens group described above may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface.
The tele lens group according to the above-described embodiments of the present application may employ a plurality of lenses, for example, five 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 size of the long-focus lens group can be effectively reduced, the sensitivity of the long-focus lens group is reduced, and the processability of the long-focus lens group is improved, so that the long-focus lens group is more beneficial to production and processing and can be suitable for a portable combined type zooming double-lens.
In the embodiments of the present application, at least one of the mirror surfaces of each lens in the telephoto lens group 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, and the fifth 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, and fifth lenses of the tele lens group has an object-side surface and an image-side surface that are aspheric mirror surfaces.
Various embodiments of a tele lens group according to the present application will be further described below with reference to fig. 1 to 6C.
Example 1
A telephoto lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2C. Fig. 1 shows a schematic structural view of a telephoto lens group according to embodiment 1 of the present application.
As shown in fig. 1, the telephoto lens group includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 1 shows a basic parameter table of the telephoto lens group of embodiment 1, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).
TABLE 1
Wherein, TTLTDistance, ImgH, from the object side surface S1 of the first lens E1 of the telephoto lens group to the image surface S13 of the telephoto lens group on the optical axis of the telephoto lens groupTSemi-FOV is half of the diagonal length of the effective pixel area on the imaging surface S13 of the telephoto lens groupTAt the maximum half field angle of the telephoto lens group, FnoTF, the f number of the telephoto lens groupTThe total effective focal length of the tele lens group.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 of the telephoto lens group are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric 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 gives the high-order term coefficients A of the respective aspherical mirror surfaces S1-S10 usable in the telephoto lens group according to example 14、A6、A8、A10、A12、A14、A16、A18And A20。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -5.8157E-03 | -1.1563E-02 | 2.4845E-02 | -4.0291E-02 | 3.8917E-02 | -2.3453E-02 | 8.4944E-03 | -1.6991E-03 | 1.4462E-04 |
| S2 | -5.3554E-02 | 7.1486E-02 | -8.9297E-02 | 7.7208E-02 | -3.9520E-02 | 1.0442E-02 | -5.8908E-04 | -3.3810E-04 | 5.9901E-05 |
| S3 | -2.0942E-02 | 6.8347E-02 | -8.1289E-02 | 2.5594E-03 | 8.3418E-02 | -8.2431E-02 | 3.6762E-02 | -8.0915E-03 | 7.0792E-04 |
| S4 | -1.2266E-02 | 1.0016E-01 | -1.8913E-01 | 3.1114E-01 | -4.9439E-01 | 5.9079E-01 | -4.2309E-01 | 1.6194E-01 | -2.5646E-02 |
| S5 | -1.0906E-01 | 5.9652E-02 | 3.8019E-02 | -1.7298E-01 | 2.5361E-01 | -1.7963E-01 | 6.7092E-02 | -1.0536E-02 | 1.0690E-04 |
| S6 | -1.4472E-01 | 1.8719E-01 | -1.2485E+00 | 5.4787E+00 | -1.5049E+01 | 2.5846E+01 | -2.6971E+01 | 1.5646E+01 | -3.8653E+00 |
| S7 | -2.1202E-02 | -4.2154E-01 | 2.8677E+00 | -1.2260E+01 | 3.1979E+01 | -5.2244E+01 | 5.1660E+01 | -2.8171E+01 | 6.4708E+00 |
| S8 | 3.7122E-02 | 1.2378E-01 | -4.0117E-01 | 1.0724E+00 | -1.7734E+00 | 1.7799E+00 | -1.0564E+00 | 3.3634E-01 | -4.3660E-02 |
| S9 | 1.9854E-03 | 1.4320E-01 | -2.0889E-01 | 1.7066E-01 | -8.6961E-02 | 2.8346E-02 | -5.7747E-03 | 6.7539E-04 | -3.4773E-05 |
| S10 | -1.2394E+00 | 2.2290E+00 | -2.4285E+00 | 1.7010E+00 | -7.8854E-01 | 2.4105E-01 | -4.6742E-02 | 5.2044E-03 | -2.5273E-04 |
TABLE 2
Fig. 2A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the telephoto lens group of embodiment 1. Fig. 2B shows a distortion curve of the telephoto lens group according to embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2C shows a chromatic aberration of magnification curve of the telephoto lens group according to embodiment 1, which represents a deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 2A to 2C, the telephoto lens group given in embodiment 1 can achieve good imaging quality.
Example 2
A telephoto lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4C. 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 view of a telephoto lens group according to embodiment 2 of the present application.
As shown in fig. 3, the telephoto lens group includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 3 shows a basic parameter table of the telephoto lens group of embodiment 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 | A18 | A20 |
| S1 | -5.8157E-03 | -1.1563E-02 | 2.4845E-02 | -4.0291E-02 | 3.8917E-02 | -2.3453E-02 | 8.4944E-03 | -1.6991E-03 | 1.4462E-04 |
| S2 | -5.3554E-02 | 7.1486E-02 | -8.9297E-02 | 7.7208E-02 | -3.9520E-02 | 1.0442E-02 | -5.8908E-04 | -3.3810E-04 | 5.9901E-05 |
| S3 | -2.0942E-02 | 6.8347E-02 | -8.1289E-02 | 2.5594E-03 | 8.3418E-02 | -8.2431E-02 | 3.6762E-02 | -8.0915E-03 | 7.0792E-04 |
| S4 | -1.2266E-02 | 1.0016E-01 | -1.8913E-01 | 3.1114E-01 | -4.9439E-01 | 5.9079E-01 | -4.2309E-01 | 1.6194E-01 | -2.5646E-02 |
| S5 | -1.0906E-01 | 5.9652E-02 | 3.8019E-02 | -1.7298E-01 | 2.5361E-01 | -1.7963E-01 | 6.7092E-02 | -1.0536E-02 | 1.0690E-04 |
| S6 | -1.4472E-01 | 1.8719E-01 | -1.2485E+00 | 5.4787E+00 | -1.5049E+01 | 2.5846E+01 | -2.6971E+01 | 1.5646E+01 | -3.8653E+00 |
| S7 | -2.1202E-02 | -4.2154E-01 | 2.8677E+00 | -1.2260E+01 | 3.1979E+01 | -5.2244E+01 | 5.1660E+01 | -2.8171E+01 | 6.4708E+00 |
| S8 | 3.7122E-02 | 1.2378E-01 | -4.0117E-01 | 1.0724E+00 | -1.7734E+00 | 1.7799E+00 | -1.0564E+00 | 3.3634E-01 | -4.3660E-02 |
| S9 | 1.9854E-03 | 1.4320E-01 | -2.0889E-01 | 1.7066E-01 | -8.6961E-02 | 2.8346E-02 | -5.7747E-03 | 6.7539E-04 | -3.4773E-05 |
| S10 | -1.2394E+00 | 2.2290E+00 | -2.4285E+00 | 1.7010E+00 | -7.8854E-01 | 2.4105E-01 | -4.6742E-02 | 5.2044E-03 | -2.5273E-04 |
TABLE 4
Fig. 4A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the telephoto lens group of embodiment 2. Fig. 4B shows a distortion curve of the telephoto lens group according to embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4C shows a chromatic aberration of magnification curve of the telephoto lens group according to embodiment 2, which represents a deviation of different image heights on the image plane after light passes through the lens. As can be seen from fig. 4A to 4C, the telephoto lens group according to embodiment 2 can achieve good imaging quality.
Example 3
A telephoto lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6C. Fig. 5 shows a schematic structural view of a telephoto lens group according to embodiment 3 of the present application.
As shown in fig. 5, the telephoto lens group includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive 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 concave 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 negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 5 shows a basic parameter table of the telephoto lens group of embodiment 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 | A18 | A20 |
| S1 | 3.6889E-03 | -2.4652E-02 | 7.2007E-02 | -1.1752E-01 | 1.0817E-01 | -5.8867E-02 | 1.8720E-02 | -3.2218E-03 | 2.3221E-04 |
| S2 | -4.3878E-01 | 5.9723E-01 | -6.1936E-01 | 6.8893E-01 | -6.6371E-01 | 4.2034E-01 | -1.5816E-01 | 3.2210E-02 | -2.7434E-03 |
| S3 | -3.7406E-01 | 6.4942E-01 | -8.2833E-01 | 1.0797E+00 | -1.0500E+00 | 6.2220E-01 | -2.0706E-01 | 3.4070E-02 | -1.9084E-03 |
| S4 | -8.3069E-03 | 3.1194E-01 | -8.5913E-01 | 1.8522E+00 | -2.4694E+00 | 2.0362E+00 | -1.0194E+00 | 2.8500E-01 | -3.4311E-02 |
| S5 | -1.6012E-02 | -3.9464E-02 | 2.0154E-01 | -5.6718E-01 | 9.9508E-01 | -1.0857E+00 | 7.1339E-01 | -2.5889E-01 | 3.9771E-02 |
| S6 | -8.0637E-02 | 1.0254E-02 | -2.2387E-01 | 5.8393E-01 | -8.6187E-01 | 8.0040E-01 | -4.5066E-01 | 1.3819E-01 | -1.7469E-02 |
| S7 | 1.5619E-01 | -3.5111E-01 | 9.0120E-01 | -2.6814E+00 | 5.3276E+00 | -6.6967E+00 | 5.2412E+00 | -2.3312E+00 | 4.5051E-01 |
| S8 | 2.2686E-01 | -5.9996E-02 | -2.8845E-01 | 1.0798E+00 | -2.2788E+00 | 3.1600E+00 | -2.7250E+00 | 1.3285E+00 | -2.7917E-01 |
| S9 | -1.2738E-01 | 5.1038E-01 | -1.0278E+00 | 1.3384E+00 | -1.1602E+00 | 6.2765E-01 | -1.9069E-01 | 2.4827E-02 | -4.0045E-05 |
| S10 | -1.3879E+00 | 3.4227E+00 | -5.1157E+00 | 4.9742E+00 | -3.2175E+00 | 1.3722E+00 | -3.7112E-01 | 5.7771E-02 | -3.9542E-03 |
TABLE 6
Fig. 6A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the telephoto lens group of embodiment 3. Fig. 6B shows a distortion curve of the telephoto lens group according to embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6C shows a chromatic aberration of magnification curve of the telephoto lens group according to embodiment 3, which represents a deviation of different image heights on the image plane after light passes through the lens. As can be seen from fig. 6A to 6C, the telephoto lens group according to embodiment 3 can achieve good imaging quality.
(II) Wide-angle lens group
The wide angle lens group according to the present application may include, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. Any adjacent two lenses among the first lens to the fifth lens of the wide angle lens group may have an air space therebetween.
In an exemplary embodiment, in the wide angle lens group, the first lens may have a negative power; the second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the third lens has positive focal power or negative focal power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a concave surface; the fifth lens may have a positive optical power.
In an exemplary embodiment, both the object side surface and the image side surface of the first lens of the wide angle lens group may be concave.
In an exemplary embodiment, an object side surface of the third lens of the wide angle lens group may be a concave surface, and an image side surface may be a convex surface.
In an exemplary embodiment, an object-side surface of the fourth lens of the wide angle lens group may be a convex surface.
In an exemplary embodiment, both the object-side surface and the image-side surface of the fifth lens of the wide angle lens group may be convex.
In an exemplary embodiment, the combined zoom bi-lens of the present application may satisfy the conditional expression Semi-FOVW> 63.0 DEG, wherein the Semi-FOVWHalf of the maximum field angle of the wide angle lens group. More specifically, Semi-FOVWFurther satisfying the condition that < Semi-FOV of 63.0 DEGWLess than 70.0, e.g. 63.1 ≦ Semi-FOVWIs less than or equal to 66.7 degrees. By satisfying the conditional expression Semi-FOVWThe angle is more than 63.0 degrees, and the wide-angle lens group can effectively ensure that a wider visual field range can be achieved when imaging.
In an exemplary embodiment, the combined zoom telephoto lens of the present application may satisfy the conditional expression 4.00 < (10 × CT 2)W)/ImgHW< 6.00, wherein ImgHWHalf of the diagonal length of the effective pixel area on the imaging surface of the wide angle lens group, CT2WThe second lens, which is a wide angle lens group, has a center thickness on an optical axis of the wide angle lens group. More specifically, CT2WAnd ImgHWFurther satisfies the condition of 4.38 ≦ (10 × CT 2)W)/ImgHWLess than or equal to 5.88. Satisfies the conditional expression of 4.00 < (10 × CT 2)W)/ImgHWLess than 6.00, the field curvature generated by the second lens of the wide-angle lens group can be reasonably controlled, and the miniaturization of the whole wide-angle lens group is also facilitated.
In an exemplary embodiment, the wide angle lens group may further include at least one stop. The diaphragm may be disposed at an appropriate position as needed, for example, between the third lens and the fourth lens. Optionally, the wide-angle lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an image forming surface.
The wide angle lens group according to the above embodiments of the present application may employ a plurality of lenses, for example, five 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 wide-angle lens group can be effectively reduced, the sensitivity of the wide-angle lens group is reduced, and the processability of the wide-angle lens group is improved, so that the wide-angle lens group is more favorable for production and processing and can be suitable for a portable combined zoom double-lens.
In an embodiment of the present application, at least one of the mirror surfaces of each lens in the wide angle lens group is an aspherical mirror surface, i.e., 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, and the fifth lens is an aspherical mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses of the wide angle lens group has an object side surface and an image side surface that are aspheric mirror surfaces.
Various embodiments of wide angle lens groups according to the present application will be further described below with reference to fig. 7 to 12C.
Example 4
A wide angle lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8C. Fig. 7 shows a schematic configuration diagram of a wide angle lens group according to embodiment 4 of the present application.
As shown in fig. 7, the wide angle lens group, 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 filter E6, and an image forming surface S13.
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 concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 7 shows a basic parameter table of the wide angle lens group 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
Wherein, TTLWDistance, ImgH, from the object side S1 of the first lens E1 of the wide angle lens group to the imaging surface S13 of the wide angle lens group on the optical axis of the wide angle lens groupWSemi-FOV which is half of the diagonal length of the effective pixel area on the imaging surface S13 of the wide-angle lens groupWAt the maximum half field angle of the wide-angle lens group, FnoWF, of a wide-angle lens groupWThe total effective focal length of the wide angle lens group.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 6.0155E-01 | -6.2684E-01 | 4.8628E-01 | -2.6944E-01 | 1.0377E-01 | -2.7074E-02 | 4.5619E-03 | -4.4775E-04 | 1.9435E-05 |
| S2 | 3.4024E-01 | -7.7726E-01 | 9.5600E+00 | -4.2534E+01 | 1.0004E+02 | -1.3641E+02 | 1.0680E+02 | -4.4498E+01 | 7.6593E+00 |
| S3 | -3.5672E-01 | 8.8429E-01 | -2.2716E+00 | 3.2661E+00 | -1.1050E+00 | -7.8568E+00 | 1.5785E+01 | -1.1715E+01 | 3.1070E+00 |
| S4 | -3.3238E-01 | 2.4656E+00 | -1.4485E+01 | 5.3513E+01 | -1.2741E+02 | 1.9450E+02 | -1.8225E+02 | 9.4510E+01 | -2.0579E+01 |
| S5 | -3.6730E-01 | 1.7570E+01 | -4.9639E+02 | 8.8504E+03 | -9.4833E+04 | 6.1870E+05 | -2.4074E+06 | 5.1336E+06 | -4.6186E+06 |
| S6 | -1.0757E+00 | 6.5385E+00 | 4.2644E+02 | -1.6380E+04 | 3.0410E+05 | -3.2744E+06 | 2.0667E+07 | -7.0921E+07 | 1.0198E+08 |
| S7 | -1.6550E+00 | 2.5316E+01 | -4.6653E+02 | 8.9765E+03 | -1.2465E+05 | 1.0748E+06 | -5.4034E+06 | 1.4396E+07 | -1.5621E+07 |
| S8 | -2.7899E+00 | 2.8340E+01 | -2.5694E+02 | 1.9180E+03 | -1.0058E+04 | 3.0797E+04 | -3.8922E+04 | -2.6578E+04 | 8.6878E+04 |
| S9 | -1.9293E+00 | 1.6297E+01 | -1.1079E+02 | 6.9340E+02 | -3.3002E+03 | 1.0616E+04 | -2.1567E+04 | 2.5034E+04 | -1.2697E+04 |
| S10 | 3.3039E-01 | -1.1845E+00 | 2.4899E+01 | -2.1954E+02 | 1.2199E+03 | -4.1763E+03 | 8.6476E+03 | -9.7970E+03 | 4.6381E+03 |
TABLE 8
Fig. 8A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the wide-angle lens group of example 4. Fig. 8B shows a distortion curve of the wide-angle lens group of example 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8C shows a chromatic aberration of magnification curve of the wide-angle lens group of example 4, which represents deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 8A to 8C, the wide angle lens group according to embodiment 4 can achieve good imaging quality.
Example 5
A wide angle lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10C. Fig. 9 shows a schematic configuration diagram of a wide angle lens group according to embodiment 5 of the present application.
As shown in fig. 9, the wide angle lens group, 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 filter E6, and an image forming surface S13.
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 negative 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 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 9 shows a basic parameter table of the wide angle lens group of example 5, in which the units of the radius of curvature, thickness, 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
Fig. 10A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the wide-angle lens group of example 5. Fig. 10B shows a distortion curve of the wide-angle lens group of example 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10C shows a chromatic aberration of magnification curve of the wide-angle lens group of example 5, which represents deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 10A to 10C, the wide-angle lens group according to example 5 can achieve good imaging quality.
Example 6
A wide angle lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12C. Fig. 11 shows a schematic configuration diagram of a wide angle lens group according to embodiment 6 of the present application.
As shown in fig. 11, the wide angle lens group, 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 filter E6, and an image forming surface S13.
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 concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 11 shows a basic parameter table of the wide angle lens group of example 6, in which the units of the radius of curvature, thickness, 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 astigmatism curve representing meridional field curvature and sagittal field curvature of the wide-angle lens group of example 6. Fig. 12B shows a distortion curve of the wide-angle lens group of example 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12C shows a chromatic aberration of magnification curve of the wide-angle lens group of example 6, which represents deviation of different image heights on an image plane after light passes through the lens. As can be seen from fig. 12A to 12C, the wide-angle lens group according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
| Conditions/examples | 1 | 2 | 3 | 4 | 5 | 6 |
| T/ImgHT | 2.63 | 2.71 | 2.96 | |||
| TTLT/fT | 0.84 | 0.84 | 0.81 | |||
| R4T/R5T | 1.31 | 2.05 | 1.06 | |||
| fT/R1T | 3.83 | 3.86 | 4.14 | |||
| (10×T45T)/TTLT | 2.27 | 2.90 | 2.85 | |||
| f1T/SAG21T | 24.50 | 32.59 | 28.67 | |||
| (10×CT2W)/ImgHW | 5.62 | 5.88 | 4.38 |
Although the tele lens group and the wide lens group are described above as including five lenses as an example, it will be understood by those skilled in the art that the number of lenses constituting the tele lens group and/or the wide lens group may be varied without departing from the claimed solution. The tele and wide lens groups may also include other numbers of lenses, if desired. Meanwhile, the various embodiments of the tele lens group and the wide lens group mentioned above may be arbitrarily combined to obtain the various results and advantages described in the present specification without departing from the spirit and scope of the present application.
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 the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (28)
1. A combined zoom double-lens barrel characterized by comprising a first lens group and a second lens group, wherein a field angle of the second lens group is larger than that of the first lens group, and a thickness of the second lens group is smaller than that of the first lens group; and
a total effective focal length f of the first lens groupTTotal effective focal length f of the second lens groupWSatisfy fT/fW＞9.00。
2. The combined zoom telephoto lens system according to claim 1, wherein the combined zoom telephoto lens system has an overall thickness T and ImgH that is half of a diagonal length of an effective pixel area on an imaging surface of the first lens groupTSatisfies the condition that T/ImgH is more than 2.00T＜3.00。
3. The combination zoom bi-lens of claim 1,
the first lens group includes at least a first lens closest to an object side;
the second lens group includes at least a first lens closest to the object side; and
a distance TTL from an object side surface of a first lens of the first lens group to an imaging surface of the first lens group on an optical axis of the first lens groupTA distance TTL from an object side surface of a first lens of the second lens group to an imaging surface of the second lens group on an optical axis of the second lens groupWSatisfy 1.00 < TTLT/TTLW＜1.50。
4. The combined zoom telephoto lens system according to claim 1, wherein the length of the diagonal of the effective pixel area on the imaging surface of the first lens group is half ImgHTImgH which is half of the diagonal length of the effective pixel area on the imaging surface of the second lens groupWSatisfies the ImgH of 1.00 & ltT/ImgHW＜2.00。
5. The combined zoom bi-lens of claim 1, wherein the first lens group comprises, in order from an object side to an image plane of the first lens group along an optical axis of the first lens group:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having a refractive power, an image-side surface of which is concave;
a third lens having a refractive power, an object-side surface of which is convex;
a fourth lens having an optical power; and
and a fifth lens having a refractive power, the object side surface of which is convex.
6. The combined zoom telephoto lens system of claim 5, wherein TTL is a distance on the optical axis of the first lens group from an object side surface of the first lens group to an image plane of the first lens groupTTotal effective focal length f of the first lens groupTMeet TTLT/fT＜1.00。
7. The combined zoom telephoto lens system according to claim 5, wherein the radius of curvature of the image side surface of the second lens of the first lens group is R4TRadius of curvature R5 from the object side surface of the third lens of the first lens groupTSatisfies the condition that R4 is more than 1.00T/R5T＜2.50。
8. The combined zoom telephoto lens system according to claim 5, wherein the total effective focal length f of the first lens groupTRadius of curvature R1 from the object side surface of the first lens groupTSatisfy 3.50 < fT/R1T＜4.50。
9. The combined zoom telephoto lens system according to claim 5, wherein the fourth lens and the fifth lens of the first lens group are separated by a distance T45 on the optical axis of the first lens groupTAnd a first lens of the first lens groupTTL to an image plane of the first lens group on an optical axis of the first lens groupTSatisfies 2.00 < (10 XT 45)T)/TTLT＜3.00。
10. The combined zoom telephoto lens system according to claim 5, wherein the effective focal length f1 of the first lens groupTAn on-axis distance SAG21 from the intersection point of the object side surface of the second lens of the first lens group and the optical axis of the first lens group to the effective radius vertex of the object side surface of the second lensTSatisfies the condition that f1 is more than 20.00T/SAG21T＜35.00。
11. The combined zoom telephoto lens system according to any one of claims 1 and 5-10, wherein the second lens group comprises, in order from an object side to an image plane of the second lens group along an optical axis of the second lens group:
a first lens having a negative optical power;
a second lens having a positive refractive power, the object-side surface of which is convex;
a third lens having optical power;
a fourth lens having a refractive power, an image-side surface of which is concave; and
a fifth lens having a positive optical power.
12. The combined zoom bi-lens of claim 11, wherein the Semi-FOV of half of the maximum field angle of the second lens groupWSatisfies the Semi-FOVW＞63.0°。
13. The combined zoom telephoto lens system according to claim 11, wherein the effective pixel area on the imaging surface of the second lens group has an ImgH that is half the diagonal length of the effective pixel areaWA center thickness CT2 on an optical axis of the second lens group with a second lens of the second lens groupWSatisfies 4.00 < (10 × CT 2)W)/ImgHW＜6.00。
14. A combined zoom telephoto lens system according to claim 11, wherein a separation distance t between the first lens group and the second lens group satisfies 0.50mm < t < 3.00 mm.
15. A combined zoom double-lens barrel characterized by comprising a first lens group and a second lens group, wherein a field angle of the second lens group is larger than that of the first lens group, and a thickness of the second lens group is smaller than that of the first lens group; and
the integral thickness T of the combined zoom double-lens-taking lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the first lens groupTSatisfies the condition that T/ImgH is more than 2.00T＜3.00。
16. The combination zoom bi-lens of claim 15,
the first lens group includes at least a first lens closest to an object side;
the second lens group includes at least a first lens closest to the object side; and
a distance TTL from an object side surface of a first lens of the first lens group to an imaging surface of the first lens group on an optical axis of the first lens groupTA distance TTL from an object side surface of a first lens of the second lens group to an imaging surface of the second lens group on an optical axis of the second lens groupWSatisfy 1.00 < TTLT/TTLW＜1.50。
17. The combined zoom telephoto lens system according to claim 15, wherein the length of the diagonal of the effective pixel area on the imaging surface of the first lens group is half ImgHTImgH which is half of the diagonal length of the effective pixel area on the imaging surface of the second lens groupWSatisfies the ImgH of 1.00 & ltT/ImgHW＜2.00。
18. The combined zoom telephoto lens system according to claim 17, wherein the total effective focal length f of the first lens groupTTotal effective focal length f of the second lens groupWSatisfy fT/fW＞9.00。
19. The combined zoom bi-lens of claim 15, wherein the second lens group comprises, in order from an object side to an image plane of the second lens group along an optical axis of the second lens group:
a first lens having a negative optical power;
a second lens having a positive refractive power, the object-side surface of which is convex;
a third lens having optical power;
a fourth lens having a refractive power, an image-side surface of which is concave; and
a fifth lens having a positive optical power.
20. The combined zoom bi-lens of claim 19, wherein the Semi-FOV of half of the maximum field angle of the second lens groupWSatisfies the Semi-FOVW＞63.0°。
21. The combined zoom telephoto lens system according to claim 19, wherein the effective pixel area on the imaging surface of the second lens group has an ImgH that is half the diagonal length of the effective pixel areaWA center thickness CT2 on an optical axis of the second lens group with a second lens of the second lens groupWSatisfies 4.00 < (10 × CT 2)W)/ImgHW＜6.00。
22. The combined zoom telephoto lens system according to any one of claims 15 and 19-21, wherein the first lens group comprises, in order from an object side to an image plane of the first lens group along an optical axis of the first lens group:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having a refractive power, an object-side surface of which is convex;
a third lens with 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 concave surface;
a fourth lens having an optical power; and
the fifth lens with focal power has a convex object-side surface and a concave image-side surface.
23. The combined zoom telephoto lens system of claim 22, wherein a distance TTL between an object side surface of the first lens group and an image plane of the first lens group on an optical axis of the first lens groupTTotal effective focal length f of the first lens groupTMeet TTLT/fT＜1.00。
24. The combined zoom telephoto lens system of claim 22, wherein the radius of curvature of the image side surface of the second lens of the first lens group is R4TRadius of curvature R5 from the object side surface of the third lens of the first lens groupTSatisfies the condition that R4 is more than 1.00T/R5T＜2.50。
25. The combined zoom telephoto lens system of claim 22, wherein the total effective focal length f of the first lens groupTRadius of curvature R1 from the object side surface of the first lens groupTSatisfy 3.50 < fT/R1T＜4.50。
26. The combined zoom telephoto lens system of claim 22, wherein the fourth lens and the fifth lens of the first lens group are separated by a distance T45 on the optical axis of the first lens groupTA distance TTL from an object side surface of a first lens of the first lens group to an imaging surface of the first lens group on an optical axis of the first lens groupTSatisfies 2.00 < (10 XT 45)T)/TTLT＜3.00。
27. The combined zoom telephoto lens system of claim 22, wherein the effective focal length f1 of the first lens groupTAn on-axis distance SAG21 from the intersection point of the object side surface of the second lens of the first lens group and the optical axis of the first lens group to the effective radius vertex of the object side surface of the second lensTSatisfies the condition that f1 is more than 20.00T/SAG21T＜35.00。
28. A combined zoom telephoto lens system according to claim 15, wherein a separation distance t between the first lens group and the second lens group satisfies 0.50mm < t < 3.00 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920799087.1U CN210015289U (en) | 2019-05-30 | 2019-05-30 | Combined zoom double-camera lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058389A (en) * | 2019-05-30 | 2019-07-26 | 浙江舜宇光学有限公司 | Combined type zoom is double to take the photograph camera lens |
| CN116047723A (en) * | 2023-03-31 | 2023-05-02 | 江西欧菲光学有限公司 | Optical lens, camera module and electronic equipment |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058389A (en) * | 2019-05-30 | 2019-07-26 | 浙江舜宇光学有限公司 | Combined type zoom is double to take the photograph camera lens |
| CN110058389B (en) * | 2019-05-30 | 2024-04-09 | 浙江舜宇光学有限公司 | Combined zoom double-shot lens |
| CN116047723A (en) * | 2023-03-31 | 2023-05-02 | 江西欧菲光学有限公司 | Optical lens, camera module and electronic equipment |
| CN116047723B (en) * | 2023-03-31 | 2023-09-05 | 江西欧菲光学有限公司 | Optical lens, camera module and electronic equipment |
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