WO2019228017A1 - 成像镜头 - Google Patents
成像镜头 Download PDFInfo
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- WO2019228017A1 WO2019228017A1 PCT/CN2019/077468 CN2019077468W WO2019228017A1 WO 2019228017 A1 WO2019228017 A1 WO 2019228017A1 CN 2019077468 W CN2019077468 W CN 2019077468W WO 2019228017 A1 WO2019228017 A1 WO 2019228017A1
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- lens
- imaging
- imaging lens
- focal length
- effective focal
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
Definitions
- the present application relates to an imaging lens, and more particularly, the present application relates to an imaging lens including seven lenses.
- imaging lenses used with portable electronic products In addition to requiring imaging lenses with high resolution and high relative brightness, they also require imaging lenses to have telephoto performance.
- the combination of the telephoto lens and the wide-angle lens makes the imaging system have a better imaging effect.
- its imaging lens should also ensure ultra-thin characteristics while ensuring high imaging quality and long focal length.
- the present application provides an imaging lens that is applicable to portable electronic products and can at least solve or partially solve at least one of the above disadvantages in the prior art.
- the present application provides such an imaging lens, which includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens.
- the first lens has a positive or negative power;
- the second lens has a positive or negative power;
- the third lens may have a negative power;
- the fourth lens may have a negative power;
- the side can be concave, and the image side can be concave;
- the fifth lens has positive or negative power;
- the sixth lens has positive or negative power;
- the seventh lens can have positive power, and its image side can Is convex.
- the total effective focal length f of the imaging lens and the effective focal length f1 of the first lens may satisfy 1.5 ⁇ f /
- the maximum half field angle HFOV of the imaging lens can satisfy HFOV ⁇ 20 °.
- the curvature radius R7 of the object side of the fourth lens and the curvature radius R8 of the image side of the fourth lens may satisfy 1 ⁇ (R7-R8) / (R7 + R8) ⁇ 3.
- the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens may satisfy 1 ⁇
- the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the imaging lens and the total effective focal length f of the imaging lens may satisfy TTL / f ⁇ 1.
- the curvature radius R1 of the object side of the first lens and the curvature radius R6 of the image side of the third lens may satisfy 2 ⁇
- the total effective focal length f of the imaging lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens may satisfy 0 ⁇
- the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens may satisfy -3 ⁇ f6 / f7 ⁇ 0.
- the sum ⁇ CT of the total effective focal length f of the imaging lens and the center thickness of the first lens to the seventh lens on the optical axis may satisfy 1.5 ⁇ f / ⁇ CT ⁇ 3.
- the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis may satisfy 1.5 ⁇ (CT2 + CT4). / CT3 ⁇ 3.
- the separation distance T45 on the optical axis of the fourth lens and the fifth lens and the separation distance T56 on the optical axis of the fifth lens and the sixth lens may satisfy 1.5 ⁇ T45 / T56 ⁇ 4.
- This application uses seven lenses. By reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, the imaging lens has a long focal length, ultra-thin, and excellent imaging. At least one beneficial effect such as quality, low sensitivity.
- FIG. 1 shows a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application
- FIGS. 2A to 2D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 1;
- FIG. 3 shows a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application
- FIGS. 4A to 4D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 2;
- FIG. 5 shows a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application
- FIGS. 6A to 6D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 3;
- FIGS. 8A to 8D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 4, respectively;
- FIG. 9 shows a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application
- FIGS. 10A to 10D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 5;
- FIG. 11 shows a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application
- FIGS. 12A to 12D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 6, respectively;
- FIG. 13 shows a schematic structural diagram of an imaging lens according to Embodiment 7 of the present application
- FIGS. 14A to 14D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 7;
- FIG. 15 shows a schematic structural diagram of an imaging lens according to Embodiment 8 of the present application
- FIGS. 16A to 16D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 8;
- FIG. 17 shows a schematic structural diagram of an imaging lens according to Embodiment 9 of the present application
- FIGS. 18A to 18D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 9;
- FIG. 19 shows a schematic structural diagram of an imaging lens according to Embodiment 10 of the present application
- FIGS. 20A to 20D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 10.
- first, second, third, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, a first lens discussed below may also be referred to as a second lens or a third lens.
- the thickness, size, and shape of the lens have been slightly exaggerated.
- the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings.
- the drawings are only examples and are not drawn to scale.
- 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 area; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial area. Concave.
- the surface of each lens near the object side is called the object side of the lens, and the surface of each lens near the image side is called the image side of the lens.
- An imaging lens may include, for example, seven lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. lens. These seven lenses are arranged in order from the object side to the image side along the optical axis, and there can be an air gap between each adjacent lens.
- the first lens has positive or negative power; the second lens has positive or negative power; the third lens may have negative power; the fourth lens may have negative light Power, the object side can be concave, the image side can be concave; the fifth lens has positive or negative power; the sixth lens has positive or negative power; the seventh lens can have positive power , Its image side can be convex.
- the first lens has positive or negative power; the second lens has positive or negative power; and the third lens may have negative power.
- the first lens may have a positive power and the second lens may have a negative power.
- the object side of the first lens may be convex.
- the image side of the third lens may be concave.
- Both the object side and the image side of the fourth lens may be concave.
- Such a surface configuration is advantageous for adjusting the angle of the incident and outgoing light of the fourth lens, which can effectively reduce the sensitivity of the system and make the system have good processing characteristics.
- the fifth lens has positive or negative power; the sixth lens has positive or negative power; and the seventh lens may have positive power.
- the reasonable combination of the fifth lens, the sixth lens, and the seventh lens can help balance the high-order aberrations generated by the front lens, make the field of view have smaller aberrations, and can be beneficial to the system's main light Match with the image surface.
- the sixth lens may have a negative power.
- the imaging lens of the present application may satisfy a conditional expression 1.5 ⁇ f /
- the effective focal length of the first lens it can produce negative spherical aberration to balance it with the positive spherical aberration produced by other lenses, so that the system has good imaging quality on the axis.
- the imaging lens of the present application can satisfy the conditional expression 1 ⁇ (R7-R8) / (R7 + R8) ⁇ 3, where R7 is the curvature radius of the object side of the fourth lens and R8 is the fourth The radius of curvature of the image side of the lens. More specifically, R7 and R8 can further satisfy 1.5 ⁇ (R7-R8) / (R7 + R8) ⁇ 2.5, such as 1.90 ⁇ (R7-R8) / (R7 + R8) ⁇ 2.29.
- the imaging lens of the present application can satisfy the conditional expression 1.5 ⁇ f / ⁇ CT ⁇ 3, where f is the total effective focal length of the imaging lens, and ⁇ CT is the first lens to the seventh lens respectively on the optical axis. Sum of the center thickness on the. More specifically, f and ⁇ CT can further satisfy 2.0 ⁇ f / ⁇ CT ⁇ 2.5, for example, 2.16 ⁇ f / ⁇ CT ⁇ 2.26. By controlling the sum of the thickness of each lens in the imaging lens, the distortion range of the system can be controlled reasonably and the system has less distortion.
- the imaging lens of the present application may satisfy the conditional expression 1 ⁇
- the effective focal lengths of the first lens and the fourth lens the spherical aberration contribution of the fourth lens can be controlled within a reasonable range, so that the on-axis field of view can obtain good imaging quality.
- the imaging lens of the present application can satisfy the conditional expression 1.5 ⁇ (CT2 + CT4) / CT3 ⁇ 3, where CT2 is the center thickness of the second lens on the optical axis and CT3 is the third lens on the light The central thickness on the axis, CT4 is the central thickness of the fourth lens on the optical axis. More specifically, CT2, CT3, and CT4 can further satisfy 2.0 ⁇ (CT2 + CT4) /CT3 ⁇ 2.3, for example, 2.05 ⁇ (CT2 + CT4) /CT3 ⁇ 2.14.
- the imaging lens of the present application can satisfy the conditional expression 2 ⁇
- the coma contribution rate of the first lens and the third lens can be controlled within a reasonable range, which can be well balanced
- the coma produced by the front lens to obtain good imaging quality.
- the imaging lens of the present application can satisfy the conditional expression 1.5 ⁇ T45 / T56 ⁇ 4, where T45 is the distance between the fourth lens and the fifth lens on the optical axis, and T56 is the fifth lens and the first lens.
- T45 and T56 can further satisfy 2.0 ⁇ T45 / T56 ⁇ 3.7, such as 2.11 ⁇ T45 / T56 ⁇ 3.52.
- the imaging lens of the present application can satisfy the conditional expression 0 ⁇
- Focal length, f3 is the effective focal length of the third lens. More specifically, f, f2, and f3 can further satisfy 0.5 ⁇
- the imaging lens of the present application may satisfy a conditional expression -3 ⁇ f6 / f7 ⁇ 0, where f6 is an effective focal length of the sixth lens and f7 is an effective focal length of the seventh lens. More specifically, f6 and f7 can further satisfy -2.90 ⁇ f6 / f7 ⁇ -0.70, for example, -2.83 ⁇ f6 / f7 ⁇ -0.80.
- the sixth lens and the seventh lens can have reasonable third-order positive spherical aberration contribution and fifth-order negative spherical aberration contribution Range, so that the remaining spherical aberration generated by the front lens can be balanced, so that the image quality of the field of view area on the axis of the imaging lens reaches a better level.
- the above-mentioned imaging lens may further include at least one diaphragm to improve the imaging quality of the lens.
- the diaphragm may be disposed between the object side and the first lens.
- the aforementioned imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element on the imaging surface.
- the imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the seven lenses described above.
- the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved.
- the imaging lens configured as above can also have beneficial effects such as ultra-thin, long focal length, excellent imaging quality, and low sensitivity.
- At least one of the mirror surfaces of each lens is an aspherical mirror surface.
- Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the lens center to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatic aberration. The use of aspheric lenses can eliminate as much aberrations as possible during imaging, thereby improving imaging quality.
- the number of lenses constituting the imaging lens may be changed to obtain various results and advantages described in this specification.
- the imaging lens is not limited to including seven lenses. If desired, the imaging lens may also include other numbers of lenses. Specific examples of the imaging lens applicable to the above embodiments will be further described below with reference to the drawings.
- FIG. 1 is a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application.
- an imaging lens includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens in order from the object side to the image side along the optical axis.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a positive power
- the object side surface S9 is a convex surface
- the image side surface S10 is a convex surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 1, where the units of the radius of curvature and thickness are millimeters (mm).
- each aspheric lens can be defined using, but not limited to, the following aspheric formula:
- x is the distance vector from the vertex of the aspheric surface when the aspheric surface is at the height h along the optical axis;
- k is the conic coefficient (given in Table 1);
- Ai is the correction coefficient of the aspherical i-th order.
- Table 2 below shows the higher-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18, and A 20 that can be used for each aspherical mirror surface S1-S14 in Example 1. .
- Table 3 shows the half of the effective pixel area diagonal length ImgH on the imaging surface S17 of the imaging lens in Example 1 and the total optical length TTL (ie, from the object side S1 to the imaging surface S17 of the first lens E1 on the optical axis). Distance), the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f, and the effective focal lengths f1 to f7 of each lens.
- FIG. 2A shows an on-axis chromatic aberration curve of the imaging lens of Example 1, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 2B shows an astigmatism curve of the imaging lens of Example 1, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 2C illustrates a distortion curve of the imaging lens of Example 1, which represents the magnitude of distortion corresponding to different image heights.
- FIG. 2D shows the magnification chromatic aberration curve of the imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. It can be known from FIG. 2A to FIG. 2D that the imaging lens provided in Embodiment 1 can achieve good imaging quality.
- FIG. 3 is a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application.
- the imaging lens includes, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a positive power
- the object side surface S9 is a concave surface
- the image side surface S10 is a convex surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 2, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 5 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
- Table 6 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens of Example 2 in ImgH, the total optical length TTL, the maximum half field of view angle HFOV, the aperture number Fno, the total effective focal length f, and the length of each lens. Effective focal lengths f1 to f7.
- FIG. 4A shows an on-axis chromatic aberration curve of the imaging lens of Embodiment 2, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 4B shows the astigmatism curve of the imaging lens of Example 2, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 4C shows a distortion curve of the imaging lens of Example 2, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 4D shows the magnification chromatic aberration curve of the imaging lens of Example 2, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to FIG. 4A to FIG. 4D, it can be known that the imaging lens provided in Embodiment 2 can achieve good imaging quality.
- FIG. 5 is a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application.
- the imaging lens sequentially includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth The lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
- the second lens E2 has a negative power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a positive power
- the object side surface S9 is a convex surface
- the image side surface S10 is a convex surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 7 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the imaging lens of Example 3.
- the units of the radius of curvature and thickness are millimeters (mm).
- Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 9 shows the half of the effective pixel area diagonal length ImgH on the imaging surface S17 of the imaging lens in Example 3, the total optical length TTL, the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f, and the length of each lens. Effective focal lengths f1 to f7.
- FIG. 6A shows an on-axis chromatic aberration curve of the imaging lens of Embodiment 3, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 6B shows the astigmatism curve of the imaging lens of Example 3, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 6C shows a distortion curve of the imaging lens of Example 3, which represents the magnitude of the distortion corresponding to different image heights.
- FIG. 6D shows the magnification chromatic aberration curve of the imaging lens of Example 3, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. It can be seen from FIGS. 6A to 6D that the imaging lens provided in Embodiment 3 can achieve good imaging quality.
- FIG. 7 is a schematic structural diagram of an imaging lens according to Embodiment 4 of the present application.
- the imaging lens includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens in order from the object side to the image side along the optical axis.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a positive power
- the object side surface S9 is a convex surface
- the image side surface S10 is a convex surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 10 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the imaging lens of Example 4, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 11 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 12 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens of Example 4 in ImgH, the total optical length TTL, the maximum half field of view angle HFOV, the aperture number Fno, the total effective focal length f, and Effective focal lengths f1 to f7.
- FIG. 8A shows an on-axis chromatic aberration curve of the imaging lens of Example 4, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 8B shows an astigmatism curve of the imaging lens of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 8C shows a distortion curve of the imaging lens of Example 4, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 8D shows a magnification chromatic aberration curve of the imaging lens of Example 4, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 8A to FIG. 8D, it can be known that the imaging lens provided in Embodiment 4 can achieve good imaging quality.
- FIG. 9 is a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application.
- the imaging lens includes, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a positive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
- the sixth lens E6 has a negative power, and the object side surface S11 is a concave surface, and the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power, and the object side surface S13 is a concave surface, and the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 5, where the units of the radius of curvature and thickness are both millimeters (mm).
- Table 14 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 15 shows the half of the effective pixel area diagonal length ImgH on the imaging surface S17 of the imaging lens in Example 5, the total optical length TTL, the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f and Effective focal lengths f1 to f7.
- FIG. 10A shows an on-axis chromatic aberration curve of the imaging lens of Example 5, which indicates that light rays of different wavelengths deviate from the focal point after passing through the lens.
- FIG. 10B shows an astigmatism curve of the imaging lens of Example 5, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 10C shows a distortion curve of the imaging lens of Example 5, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 10D shows a magnification chromatic aberration curve of the imaging lens of Example 5, which represents deviations of different image heights on the imaging plane after light passes through the lens. It can be seen from FIGS. 10A to 10D that the imaging lens provided in Embodiment 5 can achieve good imaging quality.
- FIG. 11 is a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application.
- the imaging lens sequentially includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens along the optical axis from the object side to the image side.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a negative power
- the object side surface S9 is a convex surface
- the image side surface S10 is a concave surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 6, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 17 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 18 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens of Example 6 in ImgH, the total optical length TTL, the maximum half field of view angle HFOV, the aperture number Fno, the total effective focal length f, and the length of each lens. Effective focal lengths f1 to f7.
- FIG. 12A shows an on-axis chromatic aberration curve of the imaging lens of Example 6, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 12B shows an astigmatism curve of the imaging lens of Example 6, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 12C shows the distortion curve of the imaging lens of Example 6, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 12D shows a magnification chromatic aberration curve of the imaging lens of Example 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 12A to FIG. 12D, it can be known that the imaging lens provided in Embodiment 6 can achieve good imaging quality.
- FIG. 13 is a schematic structural diagram of an imaging lens according to Embodiment 7 of the present application.
- the imaging lens sequentially includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth The lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a negative power
- the object side surface S9 is a convex surface
- the image side surface S10 is a concave surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a convex surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 7, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 20 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 21 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens in Example 7 ImgH, the total optical length TTL, the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f, and Effective focal lengths f1 to f7.
- FIG. 14A shows an on-axis chromatic aberration curve of the imaging lens of Example 7, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 14B shows an astigmatism curve of the imaging lens of Example 7, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 14C shows a distortion curve of the imaging lens of Example 7, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 14D shows a magnification chromatic aberration curve of the imaging lens of Example 7, which represents deviations of different image heights on the imaging plane after light passes through the lens.
- the imaging lens provided in Embodiment 7 can achieve good imaging quality.
- FIG. 15 is a schematic structural diagram of an imaging lens according to Embodiment 8 of the present application.
- the imaging lens sequentially includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens along the optical axis from the object side to the image side.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a negative power
- the object side surface S9 is a convex surface
- the image side surface S10 is a concave surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a concave surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 8, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 23 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in the above-mentioned Embodiment 1.
- Table 24 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens of Example 8 in ImgH, the total optical length TTL, the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f, and Effective focal lengths f1 to f7.
- FIG. 16A shows an on-axis chromatic aberration curve of the imaging lens of Example 8, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 16B shows an astigmatism curve of the imaging lens of Example 8, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 16C shows a distortion curve of the imaging lens of Example 8, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 16D shows a magnification chromatic aberration curve of the imaging lens of Example 8, which represents deviations of different image heights on the imaging surface after light passes through the lens. It can be known from FIGS. 16A to 16D that the imaging lens provided in Embodiment 8 can achieve good imaging quality.
- FIG. 17 is a schematic structural diagram of an imaging lens according to Embodiment 9 of the present application.
- the imaging lens includes, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
- the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a negative power
- the object side surface S9 is a convex surface
- the image side surface S10 is a concave surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 9, where the units of the radius of curvature and thickness are millimeters (mm).
- Table 26 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 9, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
- Table 27 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens of Example 9 in ImgH, the total optical length TTL, the maximum half field of view angle HFOV, the aperture number Fno, the total effective focal length f, and the Effective focal lengths f1 to f7.
- FIG. 18A shows an on-axis chromatic aberration curve of the imaging lens of Example 9, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 18B shows an astigmatism curve of the imaging lens of Example 9, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 18C shows a distortion curve of the imaging lens of Example 9, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 18D shows a magnification chromatic aberration curve of the imaging lens of Example 9, which represents the deviation of different image heights on the imaging plane after the light passes through the lens.
- the imaging lens provided in Embodiment 9 can achieve good imaging quality.
- FIG. 19 is a schematic structural diagram of an imaging lens according to Embodiment 10 of the present application.
- the imaging lens includes, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens.
- the lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
- the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
- the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
- the third lens E3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
- the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
- the fifth lens E5 has a negative power
- the object side surface S9 is a convex surface
- the image side surface S10 is a concave surface.
- the sixth lens E6 has a negative power
- the object side surface S11 is a concave surface
- the image side surface S12 is a convex surface.
- the seventh lens E7 has a positive power
- the object side surface S13 is a concave surface
- the image side surface S14 is a convex surface.
- the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
- Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 10, where the units of the radius of curvature and thickness are both millimeters (mm).
- Table 29 shows the high-order term coefficients that can be used for each aspherical mirror surface in Embodiment 10, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
- Table 30 shows the half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens in Example 10, ImgH, the total optical length TTL, the maximum half field angle HFOV, the aperture number Fno, the total effective focal length f, and the Effective focal lengths f1 to f7.
- FIG. 20A shows an on-axis chromatic aberration curve of the imaging lens of Example 10, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
- FIG. 20B shows an astigmatism curve of the imaging lens of Example 10, which represents a meridional image plane curvature and a sagittal image plane curvature.
- FIG. 20C illustrates a distortion curve of the imaging lens of Example 10, which represents the value of the distortion magnitude corresponding to different image heights.
- FIG. 20D shows a magnification chromatic aberration curve of the imaging lens of Example 10, which represents deviations of different image heights on the imaging plane after light passes through the lens. It can be seen from FIGS. 20A to 20D that the imaging lens provided in Embodiment 10 can achieve good imaging quality.
- Examples 1 to 10 satisfy the relationships shown in Table 31, respectively.
- the present application also provides an imaging device whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
- the imaging device may be an independent imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a mobile phone.
- the imaging device is equipped with the imaging lens described above.
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Abstract
本申请公开了一种成像镜头,该镜头沿着光轴由物侧至像侧依序包括:第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。其中,第一透镜具有光焦度;第二透镜具有光焦度;第三透镜具有负光焦度;第四透镜具有负光焦度,其物侧面为凹面,像侧面为凹面;第五透镜具有光焦度;第六透镜具有光焦度;第七透镜具有正光焦度,其像侧面为凸面;以及任意相邻两透镜之间均具有空气间隔。
Description
相关申请的交叉引用
本申请要求于2018年05月28日提交于中国国家知识产权局(CNIPA)的、专利申请号为201810520948.8的中国专利申请的优先权和权益,该中国专利申请通过引用整体并入本文。
本申请涉及一种成像镜头,更具体地,本申请涉及一种包括七片透镜的成像镜头。
随着智能手机、便携电脑和平板设备等便携式电子产品的高速更新换代,市场对与便携式电子产品配套使用的成像镜头的性能要求越来越高。除了要求成像镜头具备高分辨率、高相对亮度等特性之外,同时还会要求成像镜头具有长焦等性能。通过长焦镜头与广角镜头的搭配使用,以使得成像***具有更好的成像效果。同时,随着高端电子产品的逐渐薄化,其搭载的成像镜头也应在保证高成像品质、长焦距等特性的同时兼顾超薄特性。
发明内容
本申请提供了可适用于便携式电子产品的、可至少解决或部分解决现有技术中的上述至少一个缺点的成像镜头。
本申请提供了这样一种成像镜头,该镜头沿着光轴由物侧至像侧依序包括:第一透镜、第二透镜、第三透镜、第四透镜、第五透镜和第六透镜。其中,第一透镜具有正光焦度或负光焦度;第二透镜具有正光焦度或负光焦度;第三透镜可具有负光焦度;第四透镜可具有负光焦度,其物侧面可为凹面,像侧面可为凹面;第五透镜具有正光焦度或负光焦度;第六透镜具有正光焦度或负光焦度;第七透镜可具有正光焦度,其像侧面可为凸面。
在一个实施方式中,任意相邻两透镜之间均可具有空气间隔。
在一个实施方式中,成像镜头的总有效焦距f与第一透镜的有效焦距f1可满足1.5<f/|f1|<3.5。
在一个实施方式中,成像镜头的最大半视场角HFOV可满足HFOV≤20°。
在一个实施方式中,第四透镜的物侧面的曲率半径R7与第四透镜的像侧面的曲率半径R8可满足1<(R7-R8)/(R7+R8)<3。
在一个实施方式中,第一透镜的有效焦距f1与第四透镜的有效焦距f4可满足1<|f4/f1|<2。
在一个实施方式中,第一透镜物侧面至成像镜头的成像面在光轴上的距离TTL与成像镜头的总有效焦距f可满足TTL/f<1。
在一个实施方式中,第一透镜的物侧面的曲率半径R1与第三透镜的像侧面的曲率半径R6可满足2<|R6|/|R1|<3。
在一个实施方式中,成像镜头的总有效焦距f、第二透镜的有效焦距f2与第三透镜的有效焦距f3 可满足0<|f/f2|+|f/f3|<2。
在一个实施方式中,第六透镜的有效焦距f6与第七透镜的有效焦距f7可满足-3<f6/f7<0。
在一个实施方式中,成像镜头的总有效焦距f与第一透镜至第七透镜于光轴上的中心厚度之和∑CT可满足1.5<f/∑CT<3。
在一个实施方式中,第二透镜于光轴上的中心厚度CT2、第三透镜于光轴上的中心厚度CT3与第四透镜于光轴上的中心厚度CT4可满足1.5<(CT2+CT4)/CT3<3。
在一个实施方式中,第四透镜和第五透镜在光轴上的间隔距离T45与第五透镜和第六透镜在光轴上的间隔距离T56可满足1.5<T45/T56<4。
本申请采用了七片透镜,通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等,使得上述成像镜头具有长焦距、超薄、优良成像品质、低敏感性等至少一个有益效果。
结合附图,通过以下非限制性实施方式的详细描述,本申请的其他特征、目的和优点将变得更加明显。在附图中:
图1示出了根据本申请实施例1的成像镜头的结构示意图;图2A至图2D分别示出了实施例1的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图3示出了根据本申请实施例2的成像镜头的结构示意图;图4A至图4D分别示出了实施例2的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图5示出了根据本申请实施例3的成像镜头的结构示意图;图6A至图6D分别示出了实施例3的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图7示出了根据本申请实施例4的成像镜头的结构示意图;图8A至图8D分别示出了实施例4的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图9示出了根据本申请实施例5的成像镜头的结构示意图;图10A至图10D分别示出了实施例5的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图11示出了根据本申请实施例6的成像镜头的结构示意图;图12A至图12D分别示出了实施例6的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图13示出了根据本申请实施例7的成像镜头的结构示意图;图14A至图14D分别示出了实施例7的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图15示出了根据本申请实施例8的成像镜头的结构示意图;图16A至图16D分别示出了实施例8的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图17示出了根据本申请实施例9的成像镜头的结构示意图;图18A至图18D分别示出了实施例9的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线;
图19示出了根据本申请实施例10的成像镜头的结构示意图;图20A至图20D分别示出了实施例10的成像镜头的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线。
为了更好地理解本申请,将参考附图对本申请的各个方面做出更详细的说明。应理解,这些详细说明只是对本申请的示例性实施方式的描述,而非以任何方式限制本申请的范围。在说明书全文中,相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意,在本说明书中,第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来,而不表示对特征的任何限制。因此,在不背离本申请的教导的情况下,下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
在附图中,为了便于说明,已稍微夸大了透镜的厚度、尺寸和形状。具体来讲,附图中所示的球面或非球面的形状通过示例的方式示出。即,球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
在本文中,近轴区域是指光轴附近的区域。若透镜表面为凸面且未界定该凸面位置时,则表示该透镜表面至少于近轴区域为凸面;若透镜表面为凹面且未界定该凹面位置时,则表示该透镜表面至少于近轴区域为凹面。每个透镜靠近物侧的表面称为该透镜的物侧面,每个透镜靠近像侧的表面称为该透镜的像侧面。
还应理解的是,用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”,当在本说明书中使用时表示存在所陈述的特征、元件和/或部件,但不排除存在或附加有一个或多个其它特征、元件、部件和/或它们的组合。此外,当诸如“...中的至少一个”的表述出现在所列特征的列表之后时,修饰整个所列特征,而不是修饰列表中的单独元件。此外,当描述本申请的实施方式时,使用“可”表示“本申请的一个或多个实施方式”。并且,用语“示例性的”旨在指代示例或举例说明。
除非另外限定,否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是,用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义,并且将不被以理想化或过度正式意义解释,除非本文中明确如此限定。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。以下对本申请的特征、原理和其他方面进行详细描述。
根据本申请示例性实施方式的成像镜头可包括例如七片具有光焦度的透镜,即,第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。这七片透镜沿着光轴由物侧至像侧依序排列,各相邻透镜之间均可具有空气间隔。
在示例性实施方式中,第一透镜具有正光焦度或负光焦度;第二透镜具有正光焦度或负光焦度;第三透镜可具有负光焦度;第四透镜可具有负光焦度,其物侧面可为凹面,像侧面可为凹面;第五透镜具有正光焦度或负光焦度;第六透镜具有正光焦度或负光焦度;第七透镜可具有正光焦度,其像侧面可为凸面。
第一透镜具有正光焦度或负光焦度;第二透镜具有正光焦度或负光焦度;第三透镜可具有负光焦度。通过合理地控制第一透镜、第二透镜和第三透镜的光焦度,可有效平衡***的低阶像差,使***具有良好的成像质量。进一步地,第一透镜可具有正光焦度,第二透镜可具有负光焦度。
在示例性实施方式中,第一透镜的物侧面可为凸面。
在示例性实施方式中,第三透镜的像侧面可为凹面。
第四透镜的物侧面和像侧面均可为凹面。这样的面型设置有利于调整光线入射和出射第四透镜的角度,可有效地降低***敏感度,使***具有良好的加工特性。
第五透镜具有正光焦度或负光焦度;第六透镜具有正光焦度或负光焦度;第七透镜可具有正光焦度。通过第五透镜、第六透镜和第七透镜的合理搭配,可有利于平衡前组透镜产生的高阶像差,使得***各视场具有较小的像差,且可有利于***的主光线与像面的匹配。进一步地,第六透镜可具有负光焦度。
在示例性实施方式中,本申请的成像镜头可满足条件式1.5<f/|f1|<3.5,其中,f为成像镜头的总有效焦距,f1为第一透镜的有效焦距。更具体地,f和f1进一步可满足2.4≤f/|f1|≤2.8,例如,2.49≤f/|f1|≤2.65。通过合理控制第一透镜的有效焦距,可使其产生负球差,以与其它镜片产生的正球差平衡,从而使***在轴上具有良好的成像质量。
在示例性实施方式中,本申请的成像镜头可满足条件式HFOV≤20°,其中,HFOV为成像镜头的最大半视场角。更具体地,HFOV进一步可满足18°≤HFOV≤19°,例如HFOV=18.1°。在保证像高一定的情况下,通过将成像镜头的视场角控制在小于40°的范围内,可以使得***具有较大焦距,实现长焦的特性。
在示例性实施方式中,本申请的成像镜头可满足条件式1<(R7-R8)/(R7+R8)<3,其中,R7为第四透镜的物侧面的曲率半径,R8为第四透镜的像侧面的曲率半径。更具体地,R7和R8进一步可满足1.5≤(R7-R8)/(R7+R8)≤2.5,例如1.90≤(R7-R8)/(R7+R8)≤2.29。通过合理控制第四透镜的物侧面和像侧面的曲率半径,能够有效地控制第四透镜的物侧面与像侧面的像散贡献量,进而有效合理地控制中间视场和孔径带的像质。
在示例性实施方式中,本申请的成像镜头可满足条件式1.5<f/∑CT<3,其中,f为成像镜头的总有效焦距,∑CT为第一透镜至第七透镜分别于光轴上的中心厚度之和。更具体地,f和∑CT进一步可满足2.0≤f/∑CT≤2.5,例如,2.16≤f/∑CT≤2.26。通过控制成像镜头中各透镜厚度的总和,能够合理地控制***的畸变范围,使***具有较小的畸变。
在示例性实施方式中,本申请的成像镜头可满足条件式1<|f4/f1|<2,其中,f1为第一透镜的有效焦距,f4为第四透镜的有效焦距。更具体地,f1和f4进一步可满足1<|f4/f1|<1.5,例如1.14≤|f4/f1|≤1.40。通过约束第一透镜和第四透镜的有效焦距,可将第四透镜的球差贡献量控制在合理的范围内,使得轴上视场获得良好的成像质量。
在示例性实施方式中,本申请的成像镜头可满足条件式1.5<(CT2+CT4)/CT3<3,其中,CT2为第二透镜于光轴上的中心厚度,CT3为第三透镜于光轴上的中心厚度,CT4为第四透镜于光轴上的中心厚度。更具体地,CT2、CT3和CT4进一步可满足2.0≤(CT2+CT4)/CT3≤2.3,例如,2.05≤(CT2+CT4)/CT3≤2.14。满足条件式1.5<(CT2+CT4)/CT3<3,可将第二透镜、第三透镜和第四透镜于光轴上的中心厚度约束在一定合理的范围内,以在满足加工性能的同时,确保***的超薄特性。
在示例性实施方式中,本申请的成像镜头可满足条件式TTL/f<1,其中,TTL为第一透镜的物侧面至成像镜头的成像面的轴上距离,f为成像镜头的总有效焦距。更具体地,TTL和f进一步可满足0.85 ≤TTL/f≤0.90,例如,TTL/f=0.88。满足条件式TTL/f<1,可将第一透镜物侧面至成像面的轴上距离及成像镜头的总有效焦距约束在一定合理范围内,既可确保光学***的优良像质,也可确保***具有良好的加工性。
在示例性实施方式中,本申请的成像镜头可满足条件式2<|R6|/|R1|<3,其中,R1为第一透镜的物侧面的曲率半径,R6为第三透镜的像侧面的曲率半径。更具体地,R1和R6进一步可满足2.30≤|R6|/|R1|<3,例如,2.42≤|R6|/|R1|≤2.90。通过约束第一透镜的物侧面的曲率半径和第三透镜的像侧面的曲率半径的范围,可将第一透镜和第三透镜的慧差贡献率控制在合理范围内,进而可较好地平衡前组透镜产生的慧差,以获得良好的成像质量。
在示例性实施方式中,本申请的成像镜头可满足条件式1.5<T45/T56<4,其中,T45为第四透镜和第五透镜在光轴上的间隔距离,T56为第五透镜和第六透镜在光轴上的间隔距离。更具体地,T45和T56进一步可满足2.0≤T45/T56≤3.7,例如2.11≤T45/T56≤3.52。通过约束第四透镜至第六透镜之间的空气间隙,可使成像镜头的前组透镜产生的场曲与后组透镜产生的场曲进行平衡,从而使***具有合理的场曲。
在示例性实施方式中,本申请的成像镜头可满足条件式0<|f/f2|+|f/f3|<2,其中,f为成像镜头的总有效焦距,f2为第二透镜的有效焦距,f3为第三透镜的有效焦距。更具体地,f、f2和f3进一步可满足0.5≤|f/f2|+|f/f3|≤1.5,例如0.88≤|f/f2|+|f/f3|≤1.12。通过约束第二透镜和第三透镜的有效焦距,可合理约束第二透镜和第三透镜的球差和彗差,使***具有较小的像差和良好的成像质量。
在示例性实施方式中,本申请的成像镜头可满足条件式-3<f6/f7<0,其中,f6为第六透镜的有效焦距,f7为第七透镜的有效焦距。更具体地,f6和f7进一步可满足-2.90≤f6/f7≤-0.70,例如,-2.83≤f6/f7≤-0.80。通过将第六透镜的光焦度和第七透镜的光焦度约束在合理范围内,可使第六透镜和第七透镜具有合理的三阶正球差贡献量和五阶负球差贡献量范围,从而能够平衡前组透镜产生的剩余球差,以使得成像镜头的轴上视场区域的像质达到较佳的水平。
在示例性实施方式中,上述成像镜头还可包括至少一个光阑,以提升镜头的成像质量。可选地,光阑可设置在物侧与第一透镜之间。可选地,上述成像镜头还可包括用于校正色彩偏差的滤光片和/或用于保护位于成像面上的感光元件的保护玻璃。
根据本申请的上述实施方式的成像镜头可采用多片镜片,例如上文所述的七片。通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等,可有效地缩小镜头的体积、降低镜头的敏感度并提高镜头的可加工性,使得成像镜头更有利于生产加工并且可适用于便携式电子产品。通过上述配置的成像镜头还可具有超薄、长焦距、优良成像品质和低敏感性等有益效果。
在本申请的实施方式中,各透镜的镜面中的至少一个为非球面镜面。非球面透镜的特点是:从透镜中心到透镜周边,曲率是连续变化的。与从透镜中心到透镜周边具有恒定曲率的球面透镜不同,非球面透镜具有更佳的曲率半径特性,具有改善歪曲像差及改善像散像差的优点。采用非球面透镜后,能够尽可能地消除在成像的时候出现的像差,从而改善成像质量。
然而,本领域的技术人员应当理解,在未背离本申请要求保护的技术方案的情况下,可改变构成成像镜头的透镜数量,来获得本说明书中描述的各个结果和优点。例如,虽然在实施方式中以七个透镜为 例进行了描述,但是该成像镜头不限于包括七个透镜。如果需要,该成像镜头还可包括其它数量的透镜。下面参照附图进一步描述可适用于上述实施方式的成像镜头的具体实施例。
实施例1
以下参照图1至图2D描述根据本申请实施例1的成像镜头。图1示出了根据本申请实施例1的成像镜头的结构示意图。
如图1所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凸面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有正光焦度,其物侧面S9为凸面,像侧面S10为凸面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表1示出了实施例1的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。
表1
由表1可知,第一透镜E1至第七透镜E7中的任意一个透镜的物侧面和像侧面均为非球面。在本实施例中,各非球面透镜的面型x可利用但不限于以下非球面公式进行限定:
其中,x为非球面沿光轴方向在高度为h的位置时,距非球面顶点的距离矢高;c为非球面的近轴曲率,c=1/R(即,近轴曲率c为上表1中曲率半径R的倒数);k为圆锥系数(在表1中已给出);Ai是非球面第i-th阶的修正系数。下表2给出了可用于实施例1中各非球面镜面S1-S14的高次项系数A
4、A
6、A
8、A
10、A
12、A
14、A
16、A
18和A
20。
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.9600E-02 | -3.5095E-02 | 2.3039E-01 | -7.4523E-01 | 1.5248E+00 | -1.9609E+00 | 1.5169E+00 | -6.4437E-01 | 1.1332E-01 |
S2 | -1.0499E-01 | 2.1871E-01 | 1.7789E-01 | -1.7749E+00 | 3.6953E+00 | -3.7045E+00 | 1.7567E+00 | -2.2120E-01 | -6.2422E-02 |
S3 | -1.4055E-01 | 2.8531E-01 | 1.0093E+00 | -6.4578E+00 | 1.4644E+01 | -1.5769E+01 | 6.4763E+00 | 1.3604E+00 | -1.3766E+00 |
S4 | -9.8949E-03 | 1.1966E-02 | 3.0907E-01 | 2.4523E+00 | -3.1293E+01 | 1.2071E+02 | -2.1940E+02 | 1.9136E+02 | -6.3590E+01 |
S5 | 4.4485E-02 | -1.1898E-01 | -1.1244E+00 | 1.7341E+01 | -1.0319E+02 | 3.3273E+02 | -5.9888E+02 | 5.5934E+02 | -2.0874E+02 |
S6 | -1.2494E-02 | 5.5449E-01 | -4.9681E+00 | 3.9806E+01 | -1.9429E+02 | 5.8306E+02 | -1.0658E+03 | 1.0636E+03 | -4.3323E+02 |
S7 | -1.6101E-01 | 1.7170E-01 | 2.2845E+00 | -2.1137E+01 | 8.6120E+01 | -2.1633E+02 | 3.2441E+02 | -2.8639E+02 | 1.3085E+02 |
S8 | -3.9427E-02 | 3.8645E-01 | -3.6825E-01 | -3.5343E+00 | 1.9085E+01 | -5.5148E+01 | 9.3145E+01 | -8.2516E+01 | 2.9300E+01 |
S9 | -1.0720E-01 | 4.4637E-02 | 6.1201E-02 | -1.8811E-01 | 3.0263E-01 | -2.6687E-01 | 1.2778E-01 | -3.1250E-02 | 3.0512E-03 |
S10 | -1.2878E-01 | 1.0474E-01 | -4.7080E-02 | -4.3211E-03 | 3.3837E-02 | -2.3658E-02 | 7.2671E-03 | -1.0641E-03 | 6.0728E-05 |
S11 | -5.2930E-02 | 2.7411E-01 | -5.2977E-01 | 6.2255E-01 | -4.7441E-01 | 2.2448E-01 | -6.2289E-02 | 9.2173E-03 | -5.6015E-04 |
S12 | 3.6712E-02 | 1.7001E-01 | -5.1771E-01 | 6.8643E-01 | -5.4196E-01 | 2.6685E-01 | -8.0172E-02 | 1.3368E-02 | -9.4135E-04 |
S13 | 4.9217E-02 | -2.0533E-02 | -6.4715E-02 | 1.0060E-01 | -7.2552E-02 | 3.1528E-02 | -8.3864E-03 | 1.2510E-03 | -7.9777E-05 |
S14 | -1.9502E-02 | -8.1754E-03 | -8.7404E-03 | 1.5619E-02 | -1.0669E-02 | 4.3238E-03 | -1.0081E-03 | 1.2089E-04 | -5.6401E-06 |
表2
表3给出实施例1中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL(即,从第一透镜E1的物侧面S1至成像面S17在光轴上的距离)、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
ImgH(mm) | 1.98 | f2(mm) | -12.84 |
TTL(mm) | 5.17 | f3(mm) | -10.65 |
HFOV(°) | 18.1 | f4(mm) | -2.67 |
Fno | 2.82 | f5(mm) | 12.28 |
f(mm) | 5.90 | f6(mm) | -9.03 |
f1(mm) | 2.29 | f7(mm) | 8.66 |
表3
图2A示出了实施例1的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图2B示出了实施例1的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图2C示出了实施例1的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图2D示出了实施例1的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图2A至图2D可知,实施例1所给出的成像镜头能够实现良好的成像品质。
实施例2
以下参照图3至图4D描述根据本申请实施例2的成像镜头。在本实施例及以下实施例中,为简洁 起见,将省略部分与实施例1相似的描述。图3示出了根据本申请实施例2的成像镜头的结构示意图。
如图3所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有正光焦度,其物侧面S9为凹面,像侧面S10为凸面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表4示出了实施例2的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表5示出了可用于实施例2中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表6给出实施例2中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表4
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.9860E-02 | -3.6579E-02 | 2.3219E-01 | -7.3231E-01 | 1.4598E+00 | -1.8261E+00 | 1.3696E+00 | -5.6047E-01 | 9.3578E-02 |
S2 | -1.0130E-01 | 1.9627E-01 | 2.3277E-01 | -1.8439E+00 | 3.7616E+00 | -3.7944E+00 | 1.8677E+00 | -2.9527E-01 | -4.3301E-02 |
S3 | -1.3578E-01 | 2.4643E-01 | 1.1311E+00 | -6.6735E+00 | 1.4911E+01 | -1.6026E+01 | 6.6393E+00 | 1.3121E+00 | -1.3754E+00 |
S4 | -8.5177E-03 | 1.1205E-02 | 1.9879E-01 | 3.5211E+00 | -3.6350E+01 | 1.3436E+02 | -2.4028E+02 | 2.0798E+02 | -6.8864E+01 |
S5 | 3.7569E-02 | -5.6879E-02 | -1.5646E+00 | 2.0217E+01 | -1.1686E+02 | 3.7314E+02 | -6.6824E+02 | 6.2238E+02 | -2.3211E+02 |
S6 | -2.3670E-02 | 6.7768E-01 | -6.1262E+00 | 4.8424E+01 | -2.3694E+02 | 7.1542E+02 | -1.3105E+03 | 1.3092E+03 | -5.3596E+02 |
S7 | -1.5703E-01 | 2.1531E-01 | 1.6104E+00 | -1.5886E+01 | 6.0075E+01 | -1.3466E+02 | 1.7090E+02 | -1.2916E+02 | 6.3099E+01 |
S8 | -2.9730E-02 | 3.6718E-01 | -3.4136E-01 | -3.8892E+00 | 2.1084E+01 | -6.0566E+01 | 1.0117E+02 | -8.8961E+01 | 3.1525E+01 |
S9 | -1.0008E-01 | 5.9529E-02 | 8.8061E-03 | -1.2677E-01 | 2.3497E-01 | -1.9457E-01 | 7.8866E-02 | -1.4106E-02 | 6.5594E-04 |
S10 | -1.1695E-01 | 1.3650E-01 | -1.5326E-01 | 1.0037E-01 | -1.9013E-02 | -8.1693E-03 | 4.5901E-03 | -8.0991E-04 | 5.0484E-05 |
S11 | -4.9057E-02 | 3.2762E-01 | -7.3236E-01 | 8.7009E-01 | -6.2073E-01 | 2.7039E-01 | -6.9664E-02 | 9.6978E-03 | -5.6064E-04 |
S12 | 2.5059E-02 | 2.2253E-01 | -6.6049E-01 | 8.5230E-01 | -6.4501E-01 | 3.0407E-01 | -8.7966E-02 | 1.4234E-02 | -9.7978E-04 |
S13 | 4.0566E-02 | 5.7924E-03 | -9.9147E-02 | 1.2552E-01 | -8.2062E-02 | 3.2972E-02 | -8.2250E-03 | 1.1681E-03 | -7.1933E-05 |
S14 | -2.3755E-02 | -3.5697E-03 | -1.0966E-02 | 2.0261E-02 | -1.6058E-02 | 7.5238E-03 | -2.0584E-03 | 3.0280E-04 | -1.8634E-05 |
表5
ImgH(mm) | 1.98 | f2(mm) | -12.06 |
TTL(mm) | 5.17 | f3(mm) | -10.65 |
HFOV(°) | 18.1 | f4(mm) | -2.64 |
Fno | 2.82 | f5(mm) | 11.39 |
f(mm) | 5.91 | f6(mm) | -8.95 |
f1(mm) | 2.28 | f7(mm) | 8.69 |
表6
图4A示出了实施例2的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图4B示出了实施例2的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图4C示出了实施例2的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图4D示出了实施例2的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图4A至图4D可知,实施例2所给出的成像镜头能够实现良好的成像品质。
实施例3
以下参照图5至图6D描述了根据本申请实施例3的成像镜头。图5示出了根据本申请实施例3的成像镜头的结构示意图。
如图5所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凹面。第二透镜E2具有负光焦度,其物侧面S3为凸面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有正光焦度,其物侧面S9为凸面,像侧面S10为凸面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表7示出了实施例3的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表8示出了可用于实施例3中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表9给出实施例3中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、 总有效焦距f以及各透镜的有效焦距f1至f7。
表7
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.9884E-02 | -3.2914E-02 | 2.2556E-01 | -7.3972E-01 | 1.5457E+00 | -2.0396E+00 | 1.6282E+00 | -7.1857E-01 | 1.3255E-01 |
S2 | -1.1165E-01 | 2.1822E-01 | 4.0725E-01 | -2.9758E+00 | 6.7107E+00 | -8.1151E+00 | 5.6155E+00 | -2.1030E+00 | 3.3291E-01 |
S3 | -1.4789E-01 | 2.8425E-01 | 1.3857E+00 | -8.7858E+00 | 2.1788E+01 | -2.8890E+01 | 2.1120E+01 | -7.7710E+00 | 1.0593E+00 |
S4 | -7.9306E-03 | -7.8934E-03 | 8.3346E-01 | -1.8154E+00 | -1.2301E+01 | 7.0633E+01 | -1.4214E+02 | 1.2734E+02 | -4.1780E+01 |
S5 | 6.0281E-02 | -2.6021E-01 | 8.0080E-02 | 8.0986E+00 | -5.6496E+01 | 1.9141E+02 | -3.5008E+02 | 3.2397E+02 | -1.1639E+02 |
S6 | 1.3121E-03 | 3.4606E-01 | -3.4152E+00 | 2.8047E+01 | -1.3047E+02 | 3.6996E+02 | -6.4595E+02 | 6.1568E+02 | -2.3430E+02 |
S7 | -1.7299E-01 | 7.7253E-02 | 3.2033E+00 | -2.7306E+01 | 1.1787E+02 | -3.2119E+02 | 5.3083E+02 | -5.0443E+02 | 2.2523E+02 |
S8 | -4.8886E-02 | 3.7576E-01 | -2.5831E-01 | -3.3445E+00 | 1.7105E+01 | -4.9713E+01 | 8.5513E+01 | -7.6903E+01 | 2.7560E+01 |
S9 | -1.0711E-01 | 1.0470E-02 | 1.4393E-01 | -2.7586E-01 | 3.7110E-01 | -3.1859E-01 | 1.5826E-01 | -4.1508E-02 | 4.4634E-03 |
S10 | -1.3210E-01 | 5.0911E-02 | 7.6613E-02 | -1.0991E-01 | 8.0698E-02 | -3.5565E-02 | 9.0095E-03 | -1.1998E-03 | 6.5023E-05 |
S11 | -4.5614E-02 | 2.1585E-01 | -4.0796E-01 | 5.2033E-01 | -4.3145E-01 | 2.1541E-01 | -6.1602E-02 | 9.2697E-03 | -5.6870E-04 |
S12 | 5.6503E-02 | 1.3538E-01 | -4.7260E-01 | 6.4604E-01 | -5.1302E-01 | 2.5142E-01 | -7.5026E-02 | 1.2448E-02 | -8.7455E-04 |
S13 | 5.6658E-02 | -3.4404E-02 | -6.0587E-02 | 1.0087E-01 | -7.1975E-02 | 3.0868E-02 | -8.1922E-03 | 1.2318E-03 | -7.9648E-05 |
S14 | -1.5716E-02 | -1.1258E-02 | -1.3624E-02 | 2.1766E-02 | -1.3259E-02 | 4.3918E-03 | -6.9803E-04 | 2.3963E-05 | 3.6041E-06 |
表8
ImgH(mm) | 1.98 | f2(mm) | -17.54 |
TTL(mm) | 5.17 | f3(mm) | -10.81 |
HFOV(°) | 18.1 | f4(mm) | -2.69 |
Fno | 2.82 | f5(mm) | 13.71 |
f(mm) | 5.90 | f6(mm) | -9.06 |
f1(mm) | 2.37 | f7(mm) | 8.70 |
表9
图6A示出了实施例3的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图6B示出了实施例3的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图6C示出了实施例3的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图6D示出了实施例3的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图6A至图6D可知,实施例3所给出的成像镜头能够实现良好的成像品质。
实施例4
以下参照图7至图8D描述了根据本申请实施例4的成像镜头。图7示出了根据本申请实施例4的成像镜头的结构示意图。
如图7所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有正光焦度,其物侧面S9为凸面,像侧面S10为凸面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表10示出了实施例4的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表11示出了可用于实施例4中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表12给出实施例4中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表10
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.9950E-02 | -3.5049E-02 | 2.3288E-01 | -7.6597E-01 | 1.5954E+00 | -2.0937E+00 | 1.6631E+00 | -7.3285E-01 | 1.3582E-01 |
S2 | -1.1698E-01 | 3.0068E-01 | -1.2069E-01 | -1.0905E+00 | 2.7291E+00 | -2.9527E+00 | 1.5375E+00 | -2.8789E-01 | -1.7850E-02 |
S3 | -1.5575E-01 | 3.9369E-01 | 6.3915E-01 | -5.8574E+00 | 1.4938E+01 | -1.8974E+01 | 1.2238E+01 | -3.1881E+00 | 3.1227E-03 |
S4 | -8.3328E-03 | -9.3056E-03 | 7.6655E-01 | -1.4183E+00 | -1.3502E+01 | 7.3078E+01 | -1.4570E+02 | 1.3056E+02 | -4.3010E+01 |
S5 | 6.0238E-02 | -2.7030E-01 | 4.1233E-02 | 1.0531E+01 | -7.5595E+01 | 2.5977E+02 | -4.8040E+02 | 4.5303E+02 | -1.6884E+02 |
S6 | -1.0447E-02 | 4.7294E-01 | -4.4948E+00 | 3.7417E+01 | -1.8400E+02 | 5.5072E+02 | -9.9878E+02 | 9.8473E+02 | -3.9450E+02 |
S7 | -1.7217E-01 | 1.3677E-01 | 2.4435E+00 | -1.9952E+01 | 7.3097E+01 | -1.6187E+02 | 2.0607E+02 | -1.5430E+02 | 7.1113E+01 |
S8 | -4.5538E-02 | 3.3254E-01 | 2.3232E-01 | -6.4716E+00 | 2.8202E+01 | -7.2882E+01 | 1.1357E+02 | -9.4929E+01 | 3.2268E+01 |
S9 | -1.1240E-01 | 5.6211E-03 | 1.8521E-01 | -3.6786E-01 | 5.0395E-01 | -4.4186E-01 | 2.2681E-01 | -6.2183E-02 | 7.0637E-03 |
S10 | -1.3677E-01 | 6.0347E-02 | 6.6597E-02 | -9.5844E-02 | 6.8491E-02 | -2.9940E-02 | 7.6006E-03 | -1.0168E-03 | 5.5318E-05 |
S11 | -3.8716E-02 | 1.9947E-01 | -3.5786E-01 | 4.5055E-01 | -3.8367E-01 | 1.9701E-01 | -5.7462E-02 | 8.7547E-03 | -5.4113E-04 |
S12 | 6.1856E-02 | 8.5363E-02 | -3.5622E-01 | 5.1472E-01 | -4.2887E-01 | 2.1918E-01 | -6.7695E-02 | 1.1534E-02 | -8.2639E-04 |
S13 | 5.9273E-02 | -5.9306E-02 | -1.6391E-02 | 6.2223E-02 | -5.1903E-02 | 2.4280E-02 | -6.8259E-03 | 1.0658E-03 | -7.0568E-05 |
S14 | -1.2121E-02 | -1.6372E-02 | -7.1642E-03 | 1.3286E-02 | -6.3512E-03 | 1.0001E-03 | 2.8277E-04 | -1.2945E-04 | 1.3609E-05 |
表11
ImgH(mm) | 1.98 | f2(mm) | -10.27 |
TTL(mm) | 5.17 | f3(mm) | -10.73 |
HFOV(°) | 18.1 | f4(mm) | -2.70 |
Fno | 2.82 | f5(mm) | 11.89 |
f(mm) | 5.89 | f6(mm) | -8.46 |
f1(mm) | 2.23 | f7(mm) | 8.92 |
表12
图8A示出了实施例4的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图8B示出了实施例4的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图8C示出了实施例4的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图8D示出了实施例4的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图8A至图8D可知,实施例4所给出的成像镜头能够实现良好的成像品质。
实施例5
以下参照图9至图10D描述了根据本申请实施例5的成像镜头。图9示出了根据本申请实施例5的成像镜头的结构示意图。
如图9所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凸面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有正光 焦度,其物侧面S9为凸面,像侧面S10为凸面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表13示出了实施例5的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表14示出了可用于实施例5中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表15给出实施例5中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表13
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 2.0177E-02 | -3.7429E-02 | 2.6109E-01 | -8.9736E-01 | 1.9258E+00 | -2.5671E+00 | 2.0478E+00 | -8.9574E-01 | 1.6304E-01 |
S2 | -1.2019E-01 | 2.9110E-01 | -1.4767E-01 | -4.7799E-01 | 1.8976E-01 | 2.1172E+00 | -3.9284E+00 | 2.7791E+00 | -7.2307E-01 |
S3 | -1.5976E-01 | 4.1241E-01 | 3.0161E-01 | -3.2606E+00 | 5.1804E+00 | 1.2839E+00 | -1.1552E+01 | 1.1638E+01 | -3.8156E+00 |
S4 | -4.2537E-03 | -8.8230E-03 | 7.9335E-01 | -1.8256E+00 | -1.0809E+01 | 6.4075E+01 | -1.3041E+02 | 1.1910E+02 | -4.0678E+01 |
S5 | 6.8035E-02 | -3.5910E-01 | 1.5128E+00 | -1.1739E+00 | -2.3607E+01 | 1.2343E+02 | -2.7047E+02 | 2.7918E+02 | -1.1001E+02 |
S6 | -1.6870E-02 | 3.4092E-01 | -2.5747E+00 | 2.1616E+01 | -1.0904E+02 | 3.3842E+02 | -6.4883E+02 | 6.8091E+02 | -2.9112E+02 |
S7 | -1.9451E-01 | 1.8885E-01 | 3.5587E+00 | -3.2175E+01 | 1.4127E+02 | -3.8699E+02 | 6.4072E+02 | -6.0614E+02 | 2.6599E+02 |
S8 | -6.4097E-02 | 4.7939E-01 | -2.9501E-01 | -4.3710E+00 | 2.1662E+01 | -6.0616E+01 | 1.0019E+02 | -8.6923E+01 | 3.0193E+01 |
S9 | -1.4831E-01 | 1.2712E-02 | 2.5414E-01 | -3.3514E-01 | 2.7143E-01 | -1.4790E-01 | 3.3583E-02 | 7.0249E-03 | -3.6385E-03 |
S10 | -1.9211E-01 | 9.3575E-02 | 1.2865E-01 | -1.3377E-01 | 5.1398E-02 | -8.8572E-03 | 2.0324E-04 | 1.4832E-04 | -1.5551E-05 |
S11 | -8.2227E-02 | 3.2288E-01 | -5.6158E-01 | 6.9749E-01 | -5.6200E-01 | 2.6900E-01 | -7.3321E-02 | 1.0509E-02 | -6.1491E-04 |
S12 | 5.8408E-02 | 2.0525E-01 | -6.3650E-01 | 8.3065E-01 | -6.2626E-01 | 2.9019E-01 | -8.2000E-02 | 1.2961E-02 | -8.7426E-04 |
S13 | 6.8378E-02 | -5.6481E-02 | -3.3429E-02 | 5.5173E-02 | -3.1443E-02 | 1.2382E-02 | -3.6743E-03 | 6.7183E-04 | -5.2442E-05 |
S14 | -3.8069E-03 | -3.3273E-02 | 2.9689E-02 | -5.3456E-02 | 5.7827E-02 | -3.4086E-02 | 1.1343E-02 | -1.9997E-03 | 1.4479E-04 |
表14
ImgH(mm) | 1.98 | f2(mm) | -19.41 |
TTL(mm) | 5.17 | f3(mm) | -7.66 |
HFOV(°) | 18.1 | f4(mm) | -2.80 |
Fno | 2.82 | f5(mm) | 13.27 |
f(mm) | 5.90 | f6(mm) | -10.27 |
f1(mm) | 2.24 | f7(mm) | 12.91 |
表15
图10A示出了实施例5的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图10B示出了实施例5的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图10C示出了实施例5的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图10D示出了实施例5的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图10A至图10D可知,实施例5所给出的成像镜头能够实现良好的成像品质。
实施例6
以下参照图11至图12D描述了根据本申请实施例6的成像镜头。图11示出了根据本申请实施例6的成像镜头的结构示意图。
如图11所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有负光焦度,其物侧面S9为凸面,像侧面S10为凹面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表16示出了实施例6的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表17示出了可用于实施例6中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表18给出实施例6中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表16
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.8529E-02 | -2.1747E-02 | 1.8477E-01 | -6.8673E-01 | 1.5752E+00 | -2.2403E+00 | 1.9096E+00 | -8.9932E-01 | 1.7819E-01 |
S2 | -1.5479E-01 | 5.2508E-01 | -8.0483E-01 | 6.2712E-01 | -8.8336E-01 | 2.4284E+00 | -3.4710E+00 | 2.2963E+00 | -5.8019E-01 |
S3 | -2.0975E-01 | 7.8713E-01 | -9.4088E-01 | -6.9279E-01 | 2.3652E+00 | 9.8041E-01 | -6.9208E+00 | 6.8954E+00 | -2.2315E+00 |
S4 | -1.1445E-02 | 4.9646E-03 | 1.0366E+00 | -4.7898E+00 | 4.7745E+00 | 1.8595E+01 | -5.6711E+01 | 5.7838E+01 | -2.0517E+01 |
S5 | 1.2709E-01 | -7.7152E-01 | 3.0514E+00 | -7.4859E+00 | 2.0265E+00 | 4.8739E+01 | -1.3663E+02 | 1.5080E+02 | -6.0148E+01 |
S6 | 7.1214E-02 | -2.7977E-01 | 2.1635E-01 | 7.4593E+00 | -5.4190E+01 | 1.9304E+02 | -3.9415E+02 | 4.2269E+02 | -1.7980E+02 |
S7 | -1.3984E-01 | -1.0620E-01 | 4.8367E+00 | -4.4674E+01 | 2.1378E+02 | -6.3732E+02 | 1.1574E+03 | -1.1878E+03 | 5.4032E+02 |
S8 | 6.8262E-03 | 2.4300E-01 | 1.1318E+00 | -1.3081E+01 | 5.3348E+01 | -1.2989E+02 | 1.9216E+02 | -1.5561E+02 | 5.2228E+01 |
S9 | -3.4096E-01 | 2.5269E-01 | 6.2131E-01 | -1.6464E+00 | 2.1021E+00 | -1.7084E+00 | 8.6215E-01 | -2.4077E-01 | 2.7573E-02 |
S10 | -5.2731E-01 | 6.0993E-01 | -2.1053E-01 | 4.7658E-02 | -8.4688E-02 | 7.1946E-02 | -2.6489E-02 | 4.5805E-03 | -3.0729E-04 |
S11 | -1.4749E-01 | 8.4715E-02 | 1.3739E-01 | -1.3279E-01 | 7.1343E-03 | 3.0695E-02 | -1.3731E-02 | 2.3800E-03 | -1.5109E-04 |
S12 | 2.9753E-01 | -3.3312E-01 | -1.3616E-02 | 3.6577E-01 | -3.8381E-01 | 2.0246E-01 | -6.1449E-02 | 1.0221E-02 | -7.1887E-04 |
S13 | 2.3801E-01 | -3.9248E-01 | 4.3048E-01 | -3.9560E-01 | 2.3729E-01 | -8.0476E-02 | 1.3471E-02 | -6.5694E-04 | -4.6697E-05 |
S14 | 4.1619E-02 | -1.3298E-01 | 1.7167E-01 | -1.7851E-01 | 1.2028E-01 | -5.0998E-02 | 1.3327E-02 | -1.9579E-03 | 1.2336E-04 |
表17
ImgH(mm) | 1.98 | f2(mm) | -15.34 |
TTL(mm) | 5.17 | f3(mm) | -8.38 |
HFOV(°) | 18.1 | f4(mm) | -2.97 |
Fno | 2.82 | f5(mm) | -261.66 |
f(mm) | 5.89 | f6(mm) | -40.00 |
f1(mm) | 2.23 | f7(mm) | 14.15 |
表18
图12A示出了实施例6的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图12B示出了实施例6的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图12C示出了实施例6的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图12D示出了实施例6的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图12A至图12D可知,实施例6所给出的成像镜头能够实现良好的成像品质。
实施例7
以下参照图13至图14D描述了根据本申请实施例7的成像镜头。图13示出了根据本申请实施例7的成像镜头的结构示意图。
如图13所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有负光焦度,其物侧面S9为凸面,像侧面S10为凹面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凸面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表19示出了实施例7的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表20示出了可用于实施例7中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表21给出实施例7中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表19
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 2.1441E-02 | -4.5164E-02 | 3.3850E-01 | -1.1976E+00 | 2.5898E+00 | -3.5174E+00 | 2.9157E+00 | -1.3555E+00 | 2.6859E-01 |
S2 | -2.3614E-01 | 1.4618E+00 | -5.1358E+00 | 1.1632E+01 | -1.7545E+01 | 1.7610E+01 | -1.1395E+01 | 4.3301E+00 | -7.3573E-01 |
S3 | -3.0798E-01 | 2.1174E+00 | -8.1973E+00 | 2.0476E+01 | -3.3510E+01 | 3.6349E+01 | -2.5498E+01 | 1.0597E+01 | -1.9930E+00 |
S4 | -7.2516E-02 | 1.3228E+00 | -9.0968E+00 | 3.3345E+01 | -7.4765E+01 | 1.0997E+02 | -1.0513E+02 | 5.9325E+01 | -1.4758E+01 |
S5 | 1.2478E-01 | 5.7028E-02 | -4.8201E+00 | 2.2472E+01 | -5.1663E+01 | 7.2057E+01 | -6.2764E+01 | 3.1453E+01 | -6.0859E+00 |
S6 | 1.4278E-01 | -4.2923E-01 | -4.8817E-01 | 5.6626E+00 | -1.8316E+01 | 2.7486E+01 | -4.7411E+00 | -3.8415E+01 | 3.6016E+01 |
S7 | -1.0233E-01 | -8.5582E-02 | 1.7629E+00 | -2.4487E+01 | 1.2575E+02 | -3.8163E+02 | 7.1495E+02 | -7.6471E+02 | 3.5915E+02 |
S8 | 2.6979E-02 | 5.3344E-01 | -3.7341E+00 | 1.7652E+01 | -6.9462E+01 | 1.9319E+02 | -3.3092E+02 | 3.1035E+02 | -1.2197E+02 |
S9 | -4.8066E-01 | 7.5775E-01 | 2.6228E-01 | -3.1178E+00 | 6.1788E+00 | -6.4619E+00 | 3.8956E+00 | -1.2875E+00 | 1.8161E-01 |
S10 | -7.3249E-01 | 1.3162E+00 | -1.2177E+00 | 1.1167E+00 | -2.0406E+00 | 3.2390E+00 | -2.7962E+00 | 1.1975E+00 | -2.0228E-01 |
S11 | -1.7122E-01 | -1.6373E-01 | 1.7586E+00 | -3.8666E+00 | 4.5545E+00 | -3.2328E+00 | 1.3905E+00 | -3.3630E-01 | 3.5228E-02 |
S12 | 4.2485E-01 | -8.2889E-01 | 1.0074E+00 | -8.7947E-01 | 5.5368E-01 | -2.3573E-01 | 6.1928E-02 | -8.7624E-03 | 4.7665E-04 |
S13 | 3.0171E-01 | -5.0356E-01 | 4.8311E-01 | -3.2495E-01 | 1.1890E-01 | -4.5132E-03 | -1.2277E-02 | 3.9113E-03 | -3.8202E-04 |
S14 | 3.7432E-02 | -9.2832E-02 | 8.1613E-02 | -9.8194E-02 | 8.6634E-02 | -4.8921E-02 | 1.7274E-02 | -3.4426E-03 | 2.9264E-04 |
表20
ImgH(mm) | 1.98 | f2(mm) | -15.29 |
TTL(mm) | 5.17 | f3(mm) | -8.40 |
HFOV(°) | 18.1 | f4(mm) | -3.13 |
Fno | 2.82 | f5(mm) | -96.10 |
f(mm) | 5.89 | f6(mm) | -31.78 |
f1(mm) | 2.24 | f7(mm) | 25.09 |
表21
图14A示出了实施例7的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图14B示出了实施例7的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图14C示出了实施例7的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图14D示出了实施例7的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图14A至图14D可知,实施例7所给出的成像镜头能够实现良好的成像品质。
实施例8
以下参照图15至图16D描述了根据本申请实施例8的成像镜头。图15示出了根据本申请实施例8的成像镜头的结构示意图。
如图15所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凹面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有负光焦度,其物侧面S9为凸面,像侧面S10为凹面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凹面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表22示出了实施例8的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表23示出了可用于实施例8中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表24给出实施例8中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表22
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.8914E-02 | -2.3045E-02 | 2.1720E-01 | -8.0559E-01 | 1.7958E+00 | -2.4965E+00 | 2.1068E+00 | -9.9574E-01 | 1.9993E-01 |
S2 | -2.4217E-01 | 1.5476E+00 | -5.6932E+00 | 1.3617E+01 | -2.1701E+01 | 2.2847E+01 | -1.5279E+01 | 5.8787E+00 | -9.8905E-01 |
S3 | -3.1211E-01 | 2.2259E+00 | -9.0116E+00 | 2.3540E+01 | -4.0097E+01 | 4.4621E+01 | -3.1281E+01 | 1.2527E+01 | -2.1762E+00 |
S4 | -6.7304E-02 | 1.2526E+00 | -8.5436E+00 | 2.9773E+01 | -5.9468E+01 | 7.0374E+01 | -4.5633E+01 | 1.1642E+01 | 9.8094E-01 |
S5 | 1.2684E-01 | 1.5107E-02 | -4.5521E+00 | 2.0816E+01 | -4.2448E+01 | 4.0975E+01 | -5.2805E+00 | -2.2819E+01 | 1.4423E+01 |
S6 | 1.5018E-01 | -4.8664E-01 | -7.7181E-02 | 2.6643E+00 | -2.9969E+00 | -2.0275E+01 | 7.9926E+01 | -1.1534E+02 | 6.3206E+01 |
S7 | -9.6881E-02 | -4.6449E-02 | 3.9317E-02 | -8.4119E+00 | 4.5661E+01 | -1.3361E+02 | 2.3728E+02 | -2.3849E+02 | 1.0495E+02 |
S8 | 2.8285E-02 | 4.7908E-01 | -3.7428E+00 | 1.8691E+01 | -6.9933E+01 | 1.8123E+02 | -2.9335E+02 | 2.6435E+02 | -1.0147E+02 |
S9 | -4.9827E-01 | 1.1024E+00 | -2.0398E+00 | 4.1833E+00 | -6.9833E+00 | 7.9139E+00 | -5.5587E+00 | 2.1624E+00 | -3.5488E-01 |
S10 | -7.6559E-01 | 1.7621E+00 | -3.4070E+00 | 6.6510E+00 | -1.0038E+01 | 1.0134E+01 | -6.3124E+00 | 2.1744E+00 | -3.1551E-01 |
S11 | -1.7991E-01 | 3.2766E-02 | 8.8261E-01 | -1.9157E+00 | 2.0274E+00 | -1.2345E+00 | 4.3268E-01 | -7.9405E-02 | 5.6176E-03 |
S12 | 4.2443E-01 | -9.4490E-01 | 1.3645E+00 | -1.3996E+00 | 9.8040E-01 | -4.4494E-01 | 1.2299E-01 | -1.8586E-02 | 1.1519E-03 |
S13 | 3.0429E-01 | -5.0987E-01 | 4.5256E-01 | -1.9074E-01 | -6.2773E-02 | 1.1439E-01 | -5.2968E-02 | 1.0811E-02 | -8.2785E-04 |
S14 | 4.1955E-02 | -3.3316E-02 | -1.9987E-01 | 4.0606E-01 | -3.8893E-01 | 2.1158E-01 | -6.6426E-02 | 1.1220E-02 | -7.8873E-04 |
表23
ImgH(mm) | 1.98 | f2(mm) | -15.53 |
TTL(mm) | 5.17 | f3(mm) | -8.35 |
HFOV(°) | 18.1 | f4(mm) | -3.08 |
Fno | 2.82 | f5(mm) | -183.47 |
f(mm) | 5.89 | f6(mm) | -42.40 |
f1(mm) | 2.24 | f7(mm) | 21.38 |
表24
图16A示出了实施例8的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦 点偏离。图16B示出了实施例8的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图16C示出了实施例8的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图16D示出了实施例8的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图16A至图16D可知,实施例8所给出的成像镜头能够实现良好的成像品质。
实施例9
以下参照图17至图18D描述了根据本申请实施例9的成像镜头。图17示出了根据本申请实施例9的成像镜头的结构示意图。
如图17所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凸面。第三透镜E3具有负光焦度,其物侧面S5为凸面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有负光焦度,其物侧面S9为凸面,像侧面S10为凹面。第六透镜E6具有负光焦度,其物侧面S11为凹面,像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表25示出了实施例9的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表26示出了可用于实施例9中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表27给出实施例9中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表25
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.8284E-02 | -1.2751E-02 | 1.5412E-01 | -5.8288E-01 | 1.3251E+00 | -1.8910E+00 | 1.6426E+00 | -8.0064E-01 | 1.6537E-01 |
S2 | -2.4236E-01 | 1.5571E+00 | -5.7693E+00 | 1.3903E+01 | -2.2435E+01 | 2.4126E+01 | -1.6665E+01 | 6.7053E+00 | -1.1944E+00 |
S3 | -3.1746E-01 | 2.2791E+00 | -9.3945E+00 | 2.5270E+01 | -4.4902E+01 | 5.2914E+01 | -3.9961E+01 | 1.7562E+01 | -3.4155E+00 |
S4 | -7.6512E-02 | 1.4513E+00 | -1.0426E+01 | 4.0150E+01 | -9.3921E+01 | 1.4060E+02 | -1.3200E+02 | 7.0547E+01 | -1.6138E+01 |
S5 | 1.1864E-01 | 2.7777E-01 | -7.3769E+00 | 3.7375E+01 | -1.0086E+02 | 1.6822E+02 | -1.7295E+02 | 9.9690E+01 | -2.3672E+01 |
S6 | 1.5316E-01 | -5.5641E-01 | 4.0966E-01 | 8.1503E-01 | 1.0509E+00 | -2.5965E+01 | 8.8213E+01 | -1.2859E+02 | 7.2972E+01 |
S7 | -1.1129E-01 | -3.3020E-02 | 1.0624E+00 | -1.6366E+01 | 7.7517E+01 | -2.1555E+02 | 3.7584E+02 | -3.8288E+02 | 1.7608E+02 |
S8 | 2.4204E-02 | 3.9899E-01 | -1.8718E+00 | 5.6719E+00 | -2.0430E+01 | 6.4126E+01 | -1.2228E+02 | 1.2301E+02 | -5.0697E+01 |
S9 | -4.9780E-01 | 1.0117E+00 | -1.2529E+00 | 1.5042E+00 | -2.0127E+00 | 2.3858E+00 | -1.8757E+00 | 8.0708E-01 | -1.4322E-01 |
S10 | -7.4251E-01 | 1.5303E+00 | -2.3765E+00 | 4.0898E+00 | -6.2780E+00 | 6.7891E+00 | -4.5348E+00 | 1.6562E+00 | -2.5209E-01 |
S11 | -1.6031E-01 | -1.6783E-01 | 1.5310E+00 | -3.0529E+00 | 3.2199E+00 | -1.9993E+00 | 7.2874E-01 | -1.4377E-01 | 1.1740E-02 |
S12 | 4.2680E-01 | -8.5415E-01 | 1.0659E+00 | -8.9015E-01 | 4.5885E-01 | -1.1228E-01 | -6.2270E-03 | 9.3229E-03 | -1.4174E-03 |
S13 | 3.0880E-01 | -4.9946E-01 | 4.3344E-01 | -2.3419E-01 | 3.5351E-02 | 3.8724E-02 | -2.4533E-02 | 5.5835E-03 | -4.5488E-04 |
S14 | 4.0194E-02 | -6.3063E-02 | -5.2353E-02 | 1.2959E-01 | -1.1908E-01 | 6.0482E-02 | -1.7290E-02 | 2.5641E-03 | -1.4921E-04 |
表26
ImgH(mm) | 1.98 | f2(mm) | -20.06 |
TTL(mm) | 5.17 | f3(mm) | -7.52 |
HFOV(°) | 18.1 | f4(mm) | -3.12 |
Fno | 2.82 | f5(mm) | -162.90 |
f(mm) | 5.89 | f6(mm) | -46.53 |
f1(mm) | 2.23 | f7(mm) | 23.27 |
表27
图18A示出了实施例9的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图18B示出了实施例9的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图18C示出了实施例9的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图18D示出了实施例9的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图18A至图18D可知,实施例9所给出的成像镜头能够实现良好的成像品质。
实施例10
以下参照图19至图20D描述了根据本申请实施例10的成像镜头。图19示出了根据本申请实施例10的成像镜头的结构示意图。
如图19所示,根据本申请示例性实施方式的成像镜头沿光轴由物侧至像侧依序包括:光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度,其物侧面S1为凸面,像侧面S2为凸面。第二透镜E2具有负光焦度,其物侧面S3为凹面,像侧面S4为凸面。第三透镜E3具有负光焦度,其物侧面S5为凹面,像侧面S6为凹面。第四透镜E4具有负光焦度,其物侧面S7为凹面,像侧面S8为凹面。第五透镜E5具有负光焦度,其物侧面S9为凸面,像侧面S10为凹面。第六透镜E6具有负光焦度,其物侧面S11为凹面, 像侧面S12为凸面。第七透镜E7具有正光焦度,其物侧面S13为凹面,像侧面S14为凸面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表28示出了实施例10的成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数,其中,曲率半径和厚度的单位均为毫米(mm)。表29示出了可用于实施例10中各非球面镜面的高次项系数,其中,各非球面面型可由上述实施例1中给出的公式(1)限定。表30给出实施例10中成像镜头的成像面S17上有效像素区域对角线长的一半ImgH、光学总长度TTL、最大半视场角HFOV、光圈数Fno、总有效焦距f以及各透镜的有效焦距f1至f7。
表28
面号 | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
S1 | 1.9407E-02 | -1.5298E-02 | 1.6638E-01 | -6.2879E-01 | 1.4413E+00 | -2.0766E+00 | 1.8225E+00 | -8.9835E-01 | 1.8799E-01 |
S2 | -2.5480E-01 | 1.6817E+00 | -6.3101E+00 | 1.5154E+01 | -2.4044E+01 | 2.5137E+01 | -1.6727E+01 | 6.4421E+00 | -1.0944E+00 |
S3 | -3.2010E-01 | 2.2852E+00 | -9.3084E+00 | 2.4500E+01 | -4.2230E+01 | 4.7939E+01 | -3.4707E+01 | 1.4592E+01 | -2.7167E+00 |
S4 | -6.8887E-02 | 1.3984E+00 | -1.0209E+01 | 3.9613E+01 | -9.2882E+01 | 1.3877E+02 | -1.2967E+02 | 6.8995E+01 | -1.5768E+01 |
S5 | 1.1537E-01 | 3.3916E-01 | -7.7846E+00 | 3.8939E+01 | -1.0358E+02 | 1.6874E+02 | -1.6811E+02 | 9.3631E+01 | -2.1564E+01 |
S6 | 1.5947E-01 | -6.4398E-01 | 8.6499E-01 | -2.6345E+00 | 1.9483E+01 | -8.3321E+01 | 1.9018E+02 | -2.2434E+02 | 1.0960E+02 |
S7 | -9.5716E-02 | -9.7736E-02 | 1.2121E+00 | -1.8042E+01 | 9.1603E+01 | -2.7067E+02 | 4.8992E+02 | -5.0376E+02 | 2.2738E+02 |
S8 | 3.2096E-02 | 4.0919E-01 | -2.4872E+00 | 9.8912E+00 | -3.4756E+01 | 9.2658E+01 | -1.5606E+02 | 1.4477E+02 | -5.6417E+01 |
S9 | -4.9446E-01 | 9.4585E-01 | -1.0083E+00 | 9.3704E-01 | -1.0815E+00 | 1.3532E+00 | -1.1619E+00 | 5.3087E-01 | -9.7387E-02 |
S10 | -7.3019E-01 | 1.4371E+00 | -2.0128E+00 | 3.1984E+00 | -4.8409E+00 | 5.3127E+00 | -3.6192E+00 | 1.3447E+00 | -2.0743E-01 |
S11 | -1.4507E-01 | -2.6455E-01 | 1.8909E+00 | -3.8284E+00 | 4.2269E+00 | -2.8023E+00 | 1.1137E+00 | -2.4549E-01 | 2.3128E-02 |
S12 | 4.2627E-01 | -8.7774E-01 | 1.1735E+00 | -1.0946E+00 | 6.6933E-01 | -2.3935E-01 | 3.8866E-02 | 6.0685E-04 | -7.1030E-04 |
S13 | 3.0782E-01 | -4.9030E-01 | 3.9263E-01 | -1.5673E-01 | -4.2807E-02 | 8.4227E-02 | -3.9891E-02 | 8.3760E-03 | -6.6660E-04 |
S14 | 4.2980E-02 | -6.5545E-02 | -6.1713E-02 | 1.5002E-01 | -1.3691E-01 | 6.9000E-02 | -1.9642E-02 | 2.9195E-03 | -1.7219E-04 |
表29
ImgH(mm) | 1.98 | f2(mm) | -148.13 |
TTL(mm) | 5.17 | f3(mm) | -5.84 |
HFOV(°) | 18.1 | f4(mm) | -3.06 |
Fno | 2.82 | f5(mm) | -92.01 |
f(mm) | 5.90 | f6(mm) | -56.54 |
f1(mm) | 2.23 | f7(mm) | 23.54 |
表30
图20A示出了实施例10的成像镜头的轴上色差曲线,其表示不同波长的光线经由镜头后的会聚焦点偏离。图20B示出了实施例10的成像镜头的象散曲线,其表示子午像面弯曲和弧矢像面弯曲。图20C示出了实施例10的成像镜头的畸变曲线,其表示不同像高所对应的畸变大小值。图20D示出了实施例10的成像镜头的倍率色差曲线,其表示光线经由镜头后在成像面上的不同的像高的偏差。根据图20A至图20D可知,实施例10所给出的成像镜头能够实现良好的成像品质。
综上,实施例1至实施例10分别满足表31中所示的关系。
表31
本申请还提供一种成像装置,其电子感光元件可以是感光耦合元件(CCD)或互补性氧化金属半导体元件(CMOS)。成像装置可以是诸如数码相机的独立成像设备,也可以是集成在诸如手机等移动电子设备上的成像模块。该成像装置装配有以上描述的成像镜头。
以上描述仅为本申请的较佳实施例以及对所运用技术原理的说明。本领域技术人员应当理解,本申请中所涉及的发明范围,并不限于上述技术特征的特定组合而成的技术方案,同时也应涵盖在不脱离所述发明构思的情况下,由上述技术特征或其等同特征进行任意组合而形成的其它技术方案。例如上述特征与本申请中公开的(但不限于)具有类似功能的技术特征进行互相替换而形成的技术方案。
Claims (23)
- 成像镜头,沿着光轴由物侧至像侧依序包括:第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜,其特征在于,所述第一透镜具有光焦度;所述第二透镜具有光焦度;所述第三透镜具有负光焦度;所述第四透镜具有负光焦度,其物侧面为凹面,像侧面为凹面;所述第五透镜具有光焦度;所述第六透镜具有光焦度;以及所述第七透镜具有正光焦度,其像侧面为凸面;以及任意相邻两透镜之间均具有空气间隔。
- 根据权利要求1所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f与所述第一透镜的有效焦距f1满足1.5<f/|f1|<3.5。
- 根据权利要求1所述的成像镜头,其特征在于,所述成像镜头的最大半视场角HFOV满足HFOV≤20°。
- 根据权利要求1所述的成像镜头,其特征在于,所述第四透镜的物侧面的曲率半径R7与所述第四透镜的像侧面的曲率半径R8满足1<(R7-R8)/(R7+R8)<3。
- 根据权利要求4所述的成像镜头,其特征在于,所述第四透镜的有效焦距f4与所述第一透镜的有效焦距f1满足1<|f4/f1|<2。
- 根据权利要求1所述的成像镜头,其特征在于,所述第一透镜物侧面至所述成像镜头的成像面在所述光轴上的距离TTL与所述成像镜头的总有效焦距f满足TTL/f<1。
- 根据权利要求1所述的成像镜头,其特征在于,所述第一透镜的物侧面的曲率半径R1与所述第三透镜的像侧面的曲率半径R6满足2<|R6|/|R1|<3。
- 根据权利要求7所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f、所述第二透镜的有效焦距f2与所述第三透镜的有效焦距f3满足0<|f/f2|+|f/f3|<2。
- 根据权利要求1所述的成像镜头,其特征在于,所述第六透镜的有效焦距f6与所述第七透镜的有效焦距f7满足-3<f6/f7<0。
- 根据权利要求1至9中任一项所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f与所述第一透镜至所述第七透镜分别于所述光轴上的中心厚度之和∑CT满足1.5<f/∑CT<3。
- 根据权利要求1至9中任一项所述的成像镜头,其特征在于,所述第二透镜于所述光轴上的中心厚度CT2、所述第三透镜于所述光轴上的中心厚度CT3与所述第四透镜于所述光轴上的中心厚度CT4满足1.5<(CT2+CT4)/CT3<3。
- 根据权利要求1至9中任一项所述的成像镜头,其特征在于,所述第四透镜和所述第五透镜在所述光轴上的间隔距离T45与所述第五透镜和所述第六透镜在所述光轴上的间隔距离T56满足1.5<T45/T56<4。
- 成像镜头,沿着光轴由物侧至像侧依序包括:第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜,其特征在于,所述第一透镜具有光焦度;所述第二透镜具有光焦度;所述第三透镜具有负光焦度;所述第四透镜具有负光焦度,其物侧面为凹面,像侧面为凹面;所述第五透镜具有光焦度;所述第六透镜具有光焦度;以及所述第七透镜具有正光焦度,其像侧面为凸面;所述成像镜头的最大半视场角HFOV满足HFOV≤20°。
- 根据权利要求13所述的成像镜头,其特征在于,所述第四透镜的物侧面的曲率半径R7与所述第四透镜的像侧面的曲率半径R8满足1<(R7-R8)/(R7+R8)<3。
- 根据权利要求14所述的成像镜头,其特征在于,所述第四透镜的有效焦距f4与所述第一透镜的有效焦距f1满足1<|f4/f1|<2。
- 根据权利要求13所述的成像镜头,其特征在于,所述第一透镜物侧面至所述成像镜头的成像面在所述光轴上的距离TTL与所述成像镜头的总有效焦距f满足TTL/f<1。
- 根据权利要求13所述的成像镜头,其特征在于,所述第一透镜的物侧面的曲率半径R1与所述第三透镜的像侧面的曲率半径R6满足2<|R6|/|R1|<3。
- 根据权利要求17所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f与所述第一透镜的有效焦距f1满足1.5<f/|f1|<3.5。
- 根据权利要求17所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f、所述第二透镜的有效焦距f2与所述第三透镜的有效焦距f3满足0<|f/f2|+|f/f3|<2。
- 根据权利要求13所述的成像镜头,其特征在于,所述第六透镜的有效焦距f6与所述第七透镜的有效焦距f7满足-3<f6/f7<0。
- 根据权利要求13至20中任一项所述的成像镜头,其特征在于,所述成像镜头的总有效焦距f与所述第一透镜至所述第七透镜于所述光轴上的中心厚度之和∑CT满足1.5<f/∑CT<3。
- 根据权利要求13至20中任一项所述的成像镜头,其特征在于,所述第二透镜于所述光轴上的中心厚度CT2、所述第三透镜于所述光轴上的中心厚度CT3与所述第四透镜于所述光轴上的中心厚度CT4满足1.5<(CT2+CT4)/CT3<3。
- 根据权利要求13至20中任一项所述的成像镜头,其特征在于,所述第四透镜和所述第五透镜在所述光轴上的间隔距离T45与所述第五透镜和所述第六透镜在所述光轴上的间隔距离T56满足1.5<T45/T56<4。
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CN111999860A (zh) * | 2020-09-04 | 2020-11-27 | 厦门力鼎光电股份有限公司 | 一种用于视讯传输的广角成像镜头 |
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CN109254385B (zh) * | 2018-10-30 | 2024-05-03 | 浙江舜宇光学有限公司 | 光学成像镜头 |
CN109581627B (zh) * | 2018-12-31 | 2021-07-09 | 常州市瑞泰光电有限公司 | 摄像光学镜头 |
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