WO2022109820A1 - Optical system, camera module, and electronic device - Google Patents
Optical system, camera module, and electronic device Download PDFInfo
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- WO2022109820A1 WO2022109820A1 PCT/CN2020/131281 CN2020131281W WO2022109820A1 WO 2022109820 A1 WO2022109820 A1 WO 2022109820A1 CN 2020131281 W CN2020131281 W CN 2020131281W WO 2022109820 A1 WO2022109820 A1 WO 2022109820A1
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Definitions
- the invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and an electronic device.
- the current equipment has been able to place the camera on the side of the display screen by digging holes, so as to eliminate the structure that affects the screen ratio of the equipment such as large bezels and bangs.
- the structure of the camera largely determines the size of the screen's opening, which in turn affects the screen-to-body ratio of the device.
- the object-end structure of the camera is controlled so that the size of the screen opening is excessively reduced, the amount of incoming light of the camera will be insufficient, resulting in lower image quality.
- an optical system a camera module, and an electronic device are provided.
- An optical system comprising in order from the object side to the image side:
- the fourth lens with refractive power the object side of the fourth lens is concave at the paraxial position, and the image side is convex at the paraxial position;
- a fifth lens with positive refractive power the object side and the image side of the fifth lens are both aspherical;
- the sixth lens with negative refractive power, the object side and the image side of the sixth lens are both aspherical, and at least one of the object side and the image side is provided with an inflection point;
- optical system satisfies the relation:
- SD11 is the maximum effective radius of the object side surface of the first lens, and ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
- a camera module includes an image sensor and the optical system described in any one of the above, wherein the image sensor is arranged on the image side of the optical system.
- An electronic device includes a fixing member and the above-mentioned camera module, wherein the camera module is arranged on the fixing member.
- FIG. 1 is a schematic structural diagram of an optical system provided by a first embodiment of the present application.
- FIG. 2 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the first embodiment
- FIG. 3 is a schematic structural diagram of an optical system provided by a second embodiment of the present application.
- FIG. 4 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the second embodiment
- FIG. 5 is a schematic structural diagram of an optical system provided by a third embodiment of the present application.
- FIG. 7 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application.
- FIG. 8 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fourth embodiment
- FIG. 9 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application.
- FIG. 10 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fifth embodiment
- FIG. 11 is a schematic structural diagram of a camera module provided by an embodiment of the application.
- FIG. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
- the optical system 10 includes a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 and a sixth lens in sequence from the object side to the image side Lens L6, wherein the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.
- the lenses in the optical system 10 are arranged coaxially, that is, the optical axes of the lenses are all located on the same straight line, and the straight line may be called the optical axis 101 of the optical system 10 .
- the lens referred to in this application is an optical element which has a refractive power.
- the first lens L1 includes an object side S1 and an image side S2
- the second lens L2 includes an object side S3 and an image side S4
- the third lens L3 includes an object side S5 and an image side S6
- the fourth lens L4 includes an object side S7 and an image side S8,
- the fifth lens L5 includes an object side S9 and an image side S10
- the sixth lens L6 includes an object side S11 and an image side S12.
- the object side surface S7 of the fourth lens L4 is a concave surface at the paraxial position
- the image side surface S8 is a convex surface at the paraxial position.
- the optical system 10 has an imaging surface S13, and the imaging surface S13 is located on the image side of the sixth lens L6.
- the imaging surface S13 of the optical system 10 coincides with the photosensitive surface of the image sensor.
- the imaging surface S13 can be regarded as the photosensitive surface of the photosensitive element.
- At least one of the object side surfaces and the image side surfaces of the first lens L1 to the sixth lens L6 is aspherical.
- the object side surface and the image side surface of the fifth lens L5 and the sixth lens L6 are all aspherical surfaces.
- the object side surface and the image side surface of the first lens L1 to the sixth lens L6 can also be designed as aspherical surfaces.
- the aspheric surface configuration can further help the optical system 10 to eliminate aberrations, solve the problem of distortion of the field of view, and at the same time, it is also conducive to the miniaturized design of the optical system 10, so that the optical system 10 can maintain the miniaturized design. optical effect.
- the aberration problem can be effectively eliminated through the cooperation of the aspherical surfaces, so that the optical system 10 has excellent imaging effect, and meanwhile the flexibility of lens design and assembly is improved.
- at least one of the object side surface S11 and the image side surface S12 of the sixth lens L6 is provided with an inflection point.
- the shape of the spherical or aspherical surface is not limited to the shape shown in the drawings, and the drawings are not drawn strictly to scale, and may differ from the actual surface structure of the lens.
- Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the surface vertex
- r is the distance from the corresponding point on the aspheric surface to the optical axis
- c is the curvature of the aspheric vertex
- k is the conic coefficient
- Ai is the aspheric surface The coefficient corresponding to the i-th higher-order term in the face formula.
- the surface when the object side or the image side of a lens is aspherical, the surface may be an overall convex surface or an overall concave structure.
- the surface can also be designed to have an inflection point, and the shape of the surface will change from the center to the edge, for example, the surface is convex at the center and concave at the edge.
- one side surface of the lens is convex at the optical axis (the central area of the side surface) (the central area of the side surface), it can be understood that the area of the side surface of the lens near the optical axis is convex, so It can also be considered that the side surface is convex at the paraxial position; when one side surface of the lens is described as concave at the circumference, it can be understood that the area of the side surface near the maximum effective aperture is concave.
- the shape of the side surface from the center (optical axis) to the edge direction can be purely convex; or a convex shape from the center first Transitions to a concave shape and then becomes convex near the maximum effective aperture.
- the various shapes and structures (concave-convex relationship) of the side surface are not fully reflected, but other situations can be deduced from the above examples and should also be regarded as content described in this application.
- the material of each lens in the optical system 10 is plastic.
- the material of each lens in some embodiments may also be glass.
- the lens made of plastic can reduce the weight of the optical system 10 and the production cost, while the lens made of glass can withstand higher temperatures and have excellent optical effects.
- the material of the first lens L1 is glass
- the material of the second lens L2 to the sixth lens L6 is all plastic.
- these glass lenses located on the object side have a good resistance to extreme environments, and are not easily affected by the object side environment and cause aging. Therefore, when the optical system 10 is in extreme environments such as exposure to high temperatures and other conditions, this structure can be more effective. A good balance between optical performance and cost of the system.
- the material configuration relationship of the lenses in the optical system 10 is not limited to the above-mentioned embodiment.
- the material of any lens can be plastic or glass, and the specific design can be determined according to actual needs.
- the optical system 10 includes an infrared cut filter 110 , and the infrared cut filter 110 is disposed on the image side of the sixth lens L6 and is relatively fixed to each lens in the optical system 10 .
- the infrared cut-off filter 110 is used to filter out infrared light to prevent the infrared light from reaching the imaging surface S13 of the system, thereby preventing the infrared light from interfering with normal imaging.
- the infrared cut filter 110 may be assembled with each lens as part of the optical system 10 .
- the infrared cut-off filter 110 is not a component of the optical system 10 , and the infrared cut-off filter 110 can be installed on the optical system 10 and the photosensitive element to form a camera module. Between the system 10 and the photosensitive element.
- the infrared cut filter 110 may also be disposed on the object side of the first lens L1.
- a filter coating layer may also be provided on at least one of the first lens L1 to the sixth lens L6 to achieve the effect of filtering out infrared light.
- the optical system 10 satisfies the relationship:
- SD11 is the maximum effective radius of the object side surface S1 of the first lens L1
- ImgH is half of the image height corresponding to the maximum angle of view of the optical system 10
- ImgH can also be referred to as half of the diagonal length of the effective imaging area of the optical system 10 on the imaging plane S13.
- ImgH can also be understood as half of the diagonal length of the rectangular photosensitive area of the image sensor.
- SD11/ImgH in some embodiments can be 0.27, 0.275, 0.28, 0.285, 0.29, 0.295, or 0.3.
- the aperture of the object side S1 of the first lens L1 and the size of the imaging surface S13 of the system can be reasonably arranged, and the radial dimension of the first lens L1 can be reduced, so that the above-mentioned six-piece type can be obtained.
- the structured optical system 10 implements a small head design, thereby reducing the size of the opening on the screen of the device, thereby increasing the screen-to-body ratio of the device.
- satisfying this relationship is also conducive to the processing and molding of the first lens L1, and is also conducive to expanding the aperture, keeping the system with a good amount of incident light, so that the system has a high image quality.
- the relationship between SD11/ImgH is higher than the upper limit, the radial dimension of the first lens L1 will be too large, making it difficult to achieve a small head design; Increasing off-axis aberration is not conducive to improving image quality.
- the optical system 10 also satisfies at least one of the following relationships, and when any relationship is satisfied, it can bring corresponding effects:
- f3 is the effective focal length of the third lens L3
- f is the effective focal length of the optical system 10 .
- the f3/f in some embodiments may be 10, 10.5, 13, 15, 17, 20, 25, 30, 35, 40, 41, 42, or 42.5.
- the third lens L3 can enhance the focusing ability of the system to light, achieve good imaging quality, and at the same time help to shorten the total length of the system.
- f3/f ⁇ 5.0 the positive refractive power of the third lens L3 is too strong, resulting in insufficient aberration correction capability of the image-side lens, resulting in high-order aberrations, affecting the imaging quality of the lens.
- f3/f ⁇ 45 the equivalent positive refractive power of the third lens L3 is insufficient, which makes it difficult to shorten the total length of the system, which is not conducive to miniaturized design.
- TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S13 of the optical system 10 .
- the TTL/ImgH in some embodiments may be 1.28, 1.29, 1.3, 1.31 or 1.32.
- ET56 is the distance from the maximum effective diameter of the image side S10 of the fifth lens L5 to the maximum effective diameter of the object side S11 of the sixth lens L6 in the direction of the optical axis
- CT56 is the image side of the fifth lens L5 The distance from S10 to the object side surface S11 of the sixth lens L6 on the optical axis.
- ET56/CT56 in some embodiments may be 0.7, 0.72, 0.75, 0.8, 0.9, 1, 1.2, 1.4, 1.5, 1.55, or 1.58.
- a snap-fit or stacking structure can be formed, thereby omitting the spacer, thereby reducing the manufacturing cost, and it can also avoid that the interval between the fifth lens L5 and the sixth lens L6 is too small, which increases the sensitivity of the system and affects the imaging of the system. quality, which can better avoid the decline of lens assembly yield.
- the f/EPD in some embodiments may be 1.9, 1.92, 1.94, 1.96, 1.98, 2, 2.03, 2.05.
- the optical system 10 has the characteristics of a large aperture, so that the luminous flux per unit time of the system can be increased, and the imaging effect in a dark environment can be enhanced.
- f2/R4 in some embodiments may be -1.75, -1.70, -1.65, -1.6, -1.5, -1.45, -1.4, or -1.38.
- the second lens L2 can balance the positive spherical aberration generated by the first lens L1 to achieve good imaging quality, and at the same time, it is beneficial to the divergence of light rays, expands the field of view, and shortens the total length of the system.
- R7 is the curvature radius of the object side S7 of the fourth lens L4 at the optical axis
- R8 is the image side S8 of the fourth lens L4 at the optical axis the radius of curvature.
- in some embodiments may be 1.5, 2, 4, 5, 10, 30, 50, 60, 70, 100, 130, 150, 155, 158, or 160, in numerical units is mm.
- the curvature radius of the object side surface S7 of the fourth lens L4 and the curvature radius of the image side surface S8 of the fourth lens L4 can be appropriately configured, so that the shape of the fourth lens L4 will not be too curved, so that the correction system can be used. While astigmatic aberration can be reduced, the sensitivity of the system can also be reduced, which is beneficial to improve product yield.
- f5 is the effective focal length of the fifth lens L5
- f6 is the effective focal length of the sixth lens L6
- R11 is the curvature of the object side S11 of the sixth lens L6 at the optical axis radius.
- (f5/f6)*R11 in some embodiments may be 10.5, 11, 11.5, 12, 12.5, 13, 14, 14.5, 15, or 15.2, and the numerical unit is mm.
- controlling the ratio of the effective focal length of the fifth lens L5 to the effective focal length of the sixth lens L6 can effectively correct the system astigmatic aberration, and the correction of the curvature radius of the object side S11 of the sixth lens L6 can reduce the The light enters the incident angle of the object side S11 of the sixth lens L6, thereby avoiding the generation of stray light ghost images, and is conducive to compressing the total length of the optical lens and realizing the characteristics of thinning.
- CT5 is the thickness of the fifth lens L5 on the optical axis
- SAG51 is the sagittal height of the object side surface S9 of the fifth lens L5 at the maximum effective radius.
- in some embodiments may be 3.1, 3.3, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, or 5.1.
- the field curvature generated by each lens on the object side can also be trimmed to ensure the balance of the field curvature of the system, that is, the field curvatures of different fields of view tend to be balanced, so that the image quality of the entire system can be uniform, thereby improving the optical system. 10 image quality.
- ⁇ 2.5 the surface shape of the object side surface S9 of the fifth lens L5 at the circumference is excessively curved, which will lead to poor molding and affect the manufacturing yield.
- the above-mentioned sagittal height is the center of the object side S9 of the fifth lens L5 (that is, the intersection of the object side S9 and the optical axis) to the maximum effective light aperture of the surface (that is, the maximum effective radius of the surface) in parallel light.
- FFL is the minimum distance in the optical axis direction from the image side surface S12 of the sixth lens L6 to the imaging surface S13 of the optical system 10 .
- the FFL in some embodiments may be 0.9, 0.95, 1, 1.05, 1.1, 1.15, 1.2, or 1.25, with values in mm.
- the optical system 10 has the characteristics of a large image plane, so that it can cooperate with a large-sized image sensor, thereby improving the imaging quality.
- the optical system 10 includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side.
- FIG. 2 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the first embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
- the object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is convex at the circumference.
- the object side S3 of the second lens L2 is concave at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is concave at the circumference, and the image side S4 is concave at the circumference.
- the object side S5 of the third lens L3 is concave at the paraxial position, and the image side S6 is convex at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
- the object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
- the object side S9 of the fifth lens L5 is concave at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
- the object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
- each of the first lens L1 to the sixth lens L6 are aspherical.
- the problem of the distortion of the field of view of the optical system 10 can be effectively solved, and the lens can also achieve excellent optical effects in the case of a small and thin lens, thereby enabling the optical system 10 to achieve an excellent optical effect.
- Having a smaller volume is beneficial to realize the miniaturized design of the optical system 10 .
- the material of each lens in the optical system 10 is plastic.
- the object side S9 and the image side S10 of the fifth lens L5 do not have inflection points, while the object side S11 and the image side S12 of the sixth lens L6 are provided with Inflection point. Therefore, the manufacturing difficulty of the fifth lens L5 can be simplified, and the ability to correct the aberrations of each field of view can be concentrated more on the last lens of the system.
- Table 2 shows the aspheric coefficients of the corresponding surfaces of the lenses in Table 1, where k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface formula.
- the elements from the object plane to the image plane (the imaging plane S13, which can also be understood as the photosensitive surface of the photosensitive element in the later assembly) are sequentially arranged in the order of the elements in Table 1 from top to bottom.
- the description includes the aperture stop STO and the first lens L1 in sequence from the object side to the image side, it does not mean that the projection of the aperture stop STO on the optical axis can only be performed on the projection of the first lens L1.
- the object side also includes the case where the projection of the object side of the aperture stop STO and the object side of the first lens L1 on the optical axis overlaps, such as the arrangement in FIG. 1 .
- the surfaces corresponding to surface numbers 2 and 3 respectively represent the object side S1 and the image side S2 of the first lens L1, that is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side.
- the Y radius in Table 1 is the curvature radius of the object side or image side of the corresponding surface number on the optical axis.
- the absolute value of the first value of the lens in the "Thickness" parameter column is the thickness of the lens on the optical axis, and the absolute value of the second value is the image side of the lens to the object side of the following optical element on the optical axis. on the distance.
- the optical axes of the lenses in the embodiments of the present application are on the same straight line, and the straight line serves as the optical axis of the optical system 10 .
- the infrared cut-off filter 110 (ie, the infrared filter in the table) can be used as a component in the optical system 10 or not as a component in the optical system 10, but no matter what In this case, the distance from the image side S12 of the sixth lens L6 to the image surface S13 should be calculated into the value of the thickness parameter corresponding to the infrared cut filter 110 in the table.
- ImgH can also be understood as half the diagonal length of the rectangular effective pixel area of the image sensor, and the diagonal direction of the optical system 10 is parallel to the diagonal direction of the effective pixel area.
- the reference wavelengths of the refractive index, Abbe number, and focal length of each lens are all 587.56 nm.
- the relational formula calculation and lens structure of each embodiment are based on lens parameters (such as Table 1, Table 2, Table 3, Table 4, etc.).
- the optical system 10 satisfies the following relationships:
- SD11 is the maximum effective radius of the object side surface S1 of the first lens L1
- ImgH is half of the image height corresponding to the maximum angle of view of the optical system 10 .
- satisfying this relationship is also beneficial to the processing and molding of the first lens L1, and is beneficial to expanding the aperture, keeping the system with a good amount of incident light, so that the optical system 10 has a good image quality.
- the optical system 10 can also cooperate with the relationship of ImgH to realize the feature of a large image plane, which is beneficial to make the system have a higher image quality.
- f3/f 17.01; f3 is the effective focal length of the third lens L3 , and f is the effective focal length of the optical system 10 .
- the third lens L3 can enhance the focusing ability of the system to light, achieve good imaging quality, and at the same time help to shorten the total length of the system.
- TTL/ImgH 1.3; TTL is the distance on the optical axis from the object side surface of the first lens L1 to the imaging surface S13 of the optical system 10 .
- ET56/CT56 0.723; ET56 is the distance from the maximum effective diameter of the image side S10 of the fifth lens L5 to the maximum effective diameter of the object side S11 of the sixth lens L6 in the optical axis direction, and CT56 is the image side of the fifth lens L5 S10 to The distance of the object side surface S11 of the sixth lens L6 on the optical axis.
- CT56 is the image side of the fifth lens L5 S10 to The distance of the object side surface S11 of the sixth lens L6 on the optical axis.
- the optical system 10 has the characteristics of a large aperture, so that the luminous flux per unit time of the system can be increased, and the imaging effect in a dark environment can be enhanced.
- f2/R4 -1.365; f2 is the effective focal length of the second lens L2, and R4 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis.
- the second lens L2 can balance the positive spherical aberration generated by the first lens L1 to achieve good imaging quality, and at the same time, it is beneficial to the divergence of light rays, expands the field of view, and shortens the total length of the system.
- R7 is the curvature radius of the object side S7 of the fourth lens L4 at the optical axis
- R8 is the curvature radius of the image side S8 of the fourth lens L4 at the optical axis.
- the curvature radius of the object side surface S7 of the fourth lens L4 and the curvature radius of the image side surface S8 of the fourth lens L4 can be appropriately configured, so that the shape of the fourth lens L4 will not be too curved, so that the correction system can be used. While astigmatic aberration can be reduced, the sensitivity of the system can also be reduced, which is beneficial to improve product yield.
- f5/f6*R11 10.47mm
- f5 is the effective focal length of the fifth lens L5
- f6 is the effective focal length of the sixth lens L6
- R11 is the curvature radius of the object side S11 of the sixth lens L6 at the optical axis.
- controlling the ratio of the effective focal length of the fifth lens L5 to the effective focal length of the sixth lens L6 can effectively correct the system astigmatic aberration, and the correction of the curvature radius of the object side S11 of the sixth lens L6 can reduce the The light enters the incident angle of the object side S11 of the sixth lens L6, thereby avoiding the generation of stray light ghost images, and is conducive to compressing the total length of the optical lens and realizing the characteristics of thinning.
- 3.064; CT5 is the thickness of the fifth lens L5 on the optical axis, and SAG51 is the sag of the object side surface S9 of the fifth lens L5 at the maximum effective radius.
- the shape of the fifth lens L5 can be well controlled, which is beneficial to the manufacture and molding of the lens, and reduces the defects of poor molding.
- the field curvature generated by each lens on the object side can also be trimmed to ensure the balance of the field curvature of the system, that is, the field curvatures of different fields of view tend to be balanced, so that the image quality of the entire system can be uniform, thereby improving the optical system. 10 image quality.
- FFL 1.258mm; FFL is the minimum distance in the optical axis direction from the image side surface S12 of the sixth lens L6 to the imaging surface S13 of the optical system 10 .
- FIG. 2 includes a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the optical system 10, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens.
- the ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane S13 to the intersection of the light and the optical axis (unit is mm) .
- FIG. 2 also includes a field curvature diagram (Astigmatic Field Curves) of the optical system 10, wherein the S curve represents the sagittal field curvature at 587.56 nm, and the T curve represents the meridional field curvature at 587.56 nm. It can be seen from the figure that the field curvature of the system is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images.
- FIG. 2 also includes a distortion diagram (Distortion) of the optical system 10. It can be seen from the diagram that the image distortion caused by the main beam is small, and the imaging quality of the system is excellent.
- the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side.
- FIG. 4 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the second embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
- the object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
- the object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
- the object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
- the object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
- the object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
- the object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is concave at the circumference, and the image side S12 is convex at the circumference.
- lens parameters of the optical system 10 in the second embodiment are given in Table 3 and Table 4, wherein the definitions of the structures and parameters can be obtained from the first embodiment, and will not be repeated here.
- the camera module 10 in this embodiment satisfies the following relationship:
- the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side.
- FIG. 6 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the third embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
- the object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
- the object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
- the object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
- the object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
- the object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is convex at the circumference, and the image side S10 is convex at the circumference.
- the object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is concave at the circumference, and the image side S12 is convex at the circumference.
- lens parameters of the optical system 10 in the third embodiment are given in Table 5 and Table 6, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
- the camera module 10 in this embodiment satisfies the following relationship:
- the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side.
- FIG. 7 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the fourth embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
- the object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
- the object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
- the object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
- the object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
- the object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is convex at the circumference, and the image side S10 is convex at the circumference.
- the object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
- lens parameters of the optical system 10 in the fourth embodiment are given in Table 7 and Table 8, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
- the camera module 10 in this embodiment satisfies the following relationship:
- the optical system 10 includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side.
- FIG. 10 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the fifth embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
- the object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
- the object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
- the object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is convex at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
- the object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
- the object side S9 of the fifth lens L5 is concave at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
- the object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
- lens parameters of the optical system 10 in the fifth embodiment are given in Table 9 and Table 10, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
- the camera module 10 in this embodiment satisfies the following relationship:
- the camera module 20 may include the optical system 10 and the image sensor 210 of any one of the above-mentioned embodiments, and the image sensor 210 is disposed on the image of the optical system 10 . side.
- the image sensor 210 may be a CCD (Charge Coupled Device, charge coupled device) or a CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor).
- CCD Charge Coupled Device, charge coupled device
- CMOS Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor
- the camera module 20 includes an infrared cut filter 110 disposed between the sixth lens L6 and the image sensor 210 , and the infrared cut filter 110 is used to filter out infrared light.
- the infrared cut filter 110 may be mounted to the image end of the lens.
- the camera module 20 further includes a protective glass, the protective glass is disposed between the infrared cut filter and the image sensor 210 , and the protective glass is used to protect the image sensor 210 .
- the camera module 20 can realize a small head design, so that when used as the front camera module of the device, the size of the opening on the screen of the device can be reduced, thereby increasing the screen ratio of the device. In addition, it is also beneficial to improve the imaging quality of the system.
- the electronic device 30 includes a fixing member 310 , and the camera module 20 is mounted on the fixing member 310 .
- the fixing member 310 may be a display screen, a touch display screen, a circuit board, a middle frame, a back cover, and other components.
- the electronic device 30 can be, but is not limited to, a smartphone, a smart watch, a smart glasses, an e-book reader, an in-vehicle camera device, a monitoring device, a drone, a medical device (such as an endoscope), a tablet computer, a biometric device (such as a Fingerprint recognition equipment or pupil recognition equipment, etc.), PDA (Personal Digital Assistant, personal digital assistant), drones, etc.
- the electronic device 30 includes a touch display screen
- the camera module 20 is disposed on a side of the touch display screen away from the display surface
- the head of the camera module 20 faces the touch display screen to serve as a
- the front display module can also enable the electronic device 30 to have the function of under-screen camera.
- the "electronic equipment” used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via wired lines (eg, via a public switched telephone network (PSTN), a digital subscriber line, DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), such as digital video broadcasting handheld, DVB-H) network digital television network, satellite network, AM-FM (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal) wireless interface to receive/send communication signals installation.
- PSTN public switched telephone network
- DSL digital subscriber line
- DSL digital cable, direct cable connection, and/or another data connection/network
- WLAN wireless local area networks
- AM-FM amplitude modulation-frequency modulation, AM-FM
- wireless communication terminals Electronic devices arranged to communicate over a wireless interface may be referred to as “wireless communication terminals", “wireless terminals” and/or “mobile terminals”.
- mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistants (PDAs) with intranet access, web browsers, memo pads, calendars, and/or global positioning system (GPS) receivers; and conventional laptops and/or palmtops A receiver or other electronic device including a radiotelephone transceiver.
- PCS personal communication system
- PDAs Internet/ Personal digital assistants
- GPS global positioning system
- first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
- plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
- the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
- installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
- a first feature "on” or “under” a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch.
- the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
- the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
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Abstract
An optical system (10) comprises: a first lens (L1) having positive refractive power; a second lens (L2) having negative refractive power; a third lens (L3) having positive refractive power; a fourth lens (L4) having an object-side surface (S7) being concave in a paraxial region thereof and an image-side surface (S8) being convex in a paraxial region thereof; a fifth lens (L5) having positive refractive power, an aspheric object-side surface (S9) and an aspheric image-side surface (S10); and a sixth lens (L6) having negative refractive power, an aspheric object-side surface (S11) and an aspheric image-side surface (S12), at least one of the object-side surface (S11) and the image-side surface (S12) being provided with an inflection point. The system satisfies the following relationship: 0.25 < SD11/ImgH < 0.35, wherein SD11 is the maximum effective radius of an object-side surface (S1) of the first lens (L1), and ImgH is half of the image height corresponding to the maximum field of view of the optical system (10).
Description
本发明涉及摄影成像技术领域,特别是涉及一种光学系统、摄像模组及电子设备。The invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and an electronic device.
随着摄像设备的发展,目前的设备已能通过挖孔设计以将摄像头置于显示屏一侧,以此消除大边框、刘海等影响设备屏占比的结构。对于具有屏幕挖孔设计的设备而言,摄像头的结构很大程度上决定了屏幕的开孔尺寸,进而影响设备的屏占比。另一方面,当控制摄像头的物端结构以使屏幕开孔尺寸过度缩小时,又会导致摄像头的入光量不足,导致像质较低。With the development of camera equipment, the current equipment has been able to place the camera on the side of the display screen by digging holes, so as to eliminate the structure that affects the screen ratio of the equipment such as large bezels and bangs. For a device with a screen-hole design, the structure of the camera largely determines the size of the screen's opening, which in turn affects the screen-to-body ratio of the device. On the other hand, when the object-end structure of the camera is controlled so that the size of the screen opening is excessively reduced, the amount of incoming light of the camera will be insufficient, resulting in lower image quality.
目前市场对具有高屏占比的设备的需求较大,因此,如何设计一种能够配合显示屏以增大设备屏占比,且同时能够保持良好像质的摄像头,已然成为了业内所关注的重点之一。At present, the market has a great demand for devices with a high screen-to-body ratio. Therefore, how to design a camera that can cooperate with the display screen to increase the screen-to-body ratio of the device while maintaining good image quality has become the focus of the industry. One of the key points.
发明内容SUMMARY OF THE INVENTION
根据本申请的各种实施例,提供一种光学系统、摄像模组及电子设备。According to various embodiments of the present application, an optical system, a camera module, and an electronic device are provided.
一种光学系统,由物侧至像侧依次包括:An optical system, comprising in order from the object side to the image side:
具有正屈折力的第一透镜;a first lens having a positive refractive power;
具有负屈折力的第二透镜;a second lens having a negative refractive power;
具有正屈折力的第三透镜;a third lens having a positive refractive power;
具有屈折力的第四透镜,所述第四透镜的物侧面于近轴处为凹面,像侧面于近轴处为凸面;The fourth lens with refractive power, the object side of the fourth lens is concave at the paraxial position, and the image side is convex at the paraxial position;
具有正屈折力的第五透镜,所述第五透镜的物侧面与像侧面均为非球面;a fifth lens with positive refractive power, the object side and the image side of the fifth lens are both aspherical;
具有负屈折力的第六透镜,所述第六透镜的物侧面和像侧面均为非球面,且该物侧面和像侧面中至少一个面设有反曲点;The sixth lens with negative refractive power, the object side and the image side of the sixth lens are both aspherical, and at least one of the object side and the image side is provided with an inflection point;
所述光学系统满足关系:The optical system satisfies the relation:
0.25<SD11/ImgH<0.35;0.25<SD11/ImgH<0.35;
SD11为所述第一透镜的物侧面的最大有效半径,ImgH为所述光学系统的最大视场角所对应的像高的一半。SD11 is the maximum effective radius of the object side surface of the first lens, and ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
一种摄像模组,包括图像传感器及上述任意一项所述的光学系统,所述图像传感器设于所述光学系统的像侧。A camera module includes an image sensor and the optical system described in any one of the above, wherein the image sensor is arranged on the image side of the optical system.
一种电子设备,包括固定件及上述摄像模组,所述摄像模组设于所述固定件。An electronic device includes a fixing member and the above-mentioned camera module, wherein the camera module is arranged on the fixing member.
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.
为了更好地描述和说明这里公开的那些发明的实施例和/或示例,可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。In order to better describe and illustrate embodiments and/or examples of those inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode presently understood of these inventions.
图1为本申请第一实施例提供的光学系统的结构示意图;1 is a schematic structural diagram of an optical system provided by a first embodiment of the present application;
图2包括第一实施例中光学系统的纵向球差图、像散图和畸变图;FIG. 2 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the first embodiment;
图3为本申请第二实施例提供的光学系统的结构示意图;3 is a schematic structural diagram of an optical system provided by a second embodiment of the present application;
图4包括第二实施例中光学系统的纵向球差图、像散图和畸变图;FIG. 4 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the second embodiment;
图5为本申请第三实施例提供的光学系统的结构示意图;5 is a schematic structural diagram of an optical system provided by a third embodiment of the present application;
图6包括第三实施例中光学系统的纵向球差图、像散图和畸变图;6 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the third embodiment;
图7为本申请第四实施例提供的光学系统的结构示意图;FIG. 7 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application;
图8包括第四实施例中光学系统的纵向球差图、像散图和畸变图;FIG. 8 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fourth embodiment;
图9为本申请第五实施例提供的光学系统的结构示意图;9 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application;
图10包括第五实施例中光学系统的纵向球差图、像散图和畸变图;FIG. 10 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fifth embodiment;
图11为本申请一实施例提供的摄像模组的结构示意图;11 is a schematic structural diagram of a camera module provided by an embodiment of the application;
图12为本申请一实施例提供的电子设备的结构示意图。FIG. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
为了便于理解本发明,下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是,本发明可以以许多不同的形式来实现,并不限于本文所描述的实施方式。相反地,提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.
需要说明的是,当元件被称为“固定于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“内”、“外”、“左”、“右”以及类似的表述只是为了说明的目的,并不表示是唯一的实施方式。It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.
参考图1,在本申请的实施例中,光学系统10由物侧至像侧依次包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5及第六透镜L6,其中第一透镜L1具有正屈折力,第二透镜L2具有负屈折力,第三透镜L3具有正屈折力,第五透镜L5具有正屈折力,第六透镜L6具有负屈折力。光学系统10中各透镜同轴设置,即各透镜的光轴均位于同一直线上,该直线可称为光学系统10的光轴101。另外,本申请中所指的透镜为具有屈折力的光学元件。Referring to FIG. 1 , in the embodiment of the present application, the optical system 10 includes a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 and a sixth lens in sequence from the object side to the image side Lens L6, wherein the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power. The lenses in the optical system 10 are arranged coaxially, that is, the optical axes of the lenses are all located on the same straight line, and the straight line may be called the optical axis 101 of the optical system 10 . In addition, the lens referred to in this application is an optical element which has a refractive power.
第一透镜L1包括物侧面S1和像侧面S2,第二透镜L2包括物侧面S3和像侧面S4,第三透镜L3包括物侧面S5和像侧面S6,第四透镜L4包括物侧面S7和像侧面S8,第五透镜L5包括物侧面S9及像侧面S10,第六透镜L6包括物侧面S11和像侧面S12。在本申请的实施例中,第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面。The first lens L1 includes an object side S1 and an image side S2, the second lens L2 includes an object side S3 and an image side S4, the third lens L3 includes an object side S5 and an image side S6, and the fourth lens L4 includes an object side S7 and an image side S8, the fifth lens L5 includes an object side S9 and an image side S10, and the sixth lens L6 includes an object side S11 and an image side S12. In the embodiment of the present application, the object side surface S7 of the fourth lens L4 is a concave surface at the paraxial position, and the image side surface S8 is a convex surface at the paraxial position.
另外,光学系统10还有一成像面S13,成像面S13位于第六透镜L6的像侧。一般地,光学系统10的成像面S13与图像传感器的感光面重合,为方便理解,可将成像面S13视为感光元件的感光表面。In addition, the optical system 10 has an imaging surface S13, and the imaging surface S13 is located on the image side of the sixth lens L6. Generally, the imaging surface S13 of the optical system 10 coincides with the photosensitive surface of the image sensor. For the convenience of understanding, the imaging surface S13 can be regarded as the photosensitive surface of the photosensitive element.
第一透镜L1至第六透镜L6的各物侧面及像侧面中的至少一个表面为非球面。在本申请的实施例中,第五透镜L5、第六透镜L6的物侧面及像侧面均为非球面。进一步地,也可以将第一透镜L1至第六透镜L6的物侧面及像侧面均设计为非球面。非球面的面型设置能够进一步帮助光学系统10消除像差,解决视界歪曲的问题,同时还有利于光学系统10的小型化设计,使光学系统10能够在保持小型化设计的前提下同时具备优良的光学效果。通过非球面的配合可有效消除像差问题,使光学系统10具有优良的成像效果,同时提高镜片设计及组装的灵活性。另外,在本申请的实施例中,第六透镜L6的物侧面S11和像侧面S12中的至少一者设有反曲点。At least one of the object side surfaces and the image side surfaces of the first lens L1 to the sixth lens L6 is aspherical. In the embodiment of the present application, the object side surface and the image side surface of the fifth lens L5 and the sixth lens L6 are all aspherical surfaces. Further, the object side surface and the image side surface of the first lens L1 to the sixth lens L6 can also be designed as aspherical surfaces. The aspheric surface configuration can further help the optical system 10 to eliminate aberrations, solve the problem of distortion of the field of view, and at the same time, it is also conducive to the miniaturized design of the optical system 10, so that the optical system 10 can maintain the miniaturized design. optical effect. The aberration problem can be effectively eliminated through the cooperation of the aspherical surfaces, so that the optical system 10 has excellent imaging effect, and meanwhile the flexibility of lens design and assembly is improved. In addition, in the embodiment of the present application, at least one of the object side surface S11 and the image side surface S12 of the sixth lens L6 is provided with an inflection point.
应注意的是,球面或非球面的形状并不限于附图中示出的形状,且附图并非按严格按比例绘制,其与透镜的实际面型结构可能存在一定差异。It should be noted that the shape of the spherical or aspherical surface is not limited to the shape shown in the drawings, and the drawings are not drawn strictly to scale, and may differ from the actual surface structure of the lens.
非球面的面型计算可参考非球面公式:For the calculation of the surface shape of the aspheric surface, please refer to the aspheric surface formula:
其中,Z为非球面上相应点到与表面顶点相切的平面的距离,r为非球面上相应点到光轴的距离,c为非球面顶点的曲率,k为圆锥系数,Ai为非球面面型公式中与第i项高次项相对应的系数。where Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the surface vertex, r is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, k is the conic coefficient, and Ai is the aspheric surface The coefficient corresponding to the i-th higher-order term in the face formula.
另一方面,在一些实施例中,当某个透镜的物侧面或像侧面为非球面时,该面可以是整体凸面或整体呈现凹面的结构。或者,该面也可设计成存在反曲点的结构,此时该面由中心至边缘的面型将发生改变,例如该面于中心处呈凸面而于边缘处呈凹面。需要注意的是,当本申请的实施例在描述透镜的一个侧面于光轴处(该侧面的中心区域)为凸面时,可理解为该透镜的该侧面于光轴附近的区域为凸面,因此也可认为该侧面于近轴处为凸面;当描述透镜的一个侧面于圆周处为凹面时,可理解为该 侧面在靠近最大有效孔径处的区域为凹面。举例而言,当该侧面于近轴处为凸面,且于圆周处也为凸面时,该侧面由中心(光轴)至边缘方向的形状可以为纯粹的凸面;或者是先由中心的凸面形状过渡到凹面形状,随后在靠近最大有效孔径处时变为凸面。此处仅为说明光轴处与圆周处的关系而做出的示例,侧面的多种形状结构(凹凸关系)并未完全体现,但其他情况可根据以上示例推导得出,也应视为是本申请所记载的内容。On the other hand, in some embodiments, when the object side or the image side of a lens is aspherical, the surface may be an overall convex surface or an overall concave structure. Alternatively, the surface can also be designed to have an inflection point, and the shape of the surface will change from the center to the edge, for example, the surface is convex at the center and concave at the edge. It should be noted that when the embodiments of the present application describe that one side surface of the lens is convex at the optical axis (the central area of the side surface), it can be understood that the area of the side surface of the lens near the optical axis is convex, so It can also be considered that the side surface is convex at the paraxial position; when one side surface of the lens is described as concave at the circumference, it can be understood that the area of the side surface near the maximum effective aperture is concave. For example, when the side surface is convex at the paraxial position and is also convex at the circumference, the shape of the side surface from the center (optical axis) to the edge direction can be purely convex; or a convex shape from the center first Transitions to a concave shape and then becomes convex near the maximum effective aperture. This is only an example to illustrate the relationship between the optical axis and the circumference. The various shapes and structures (concave-convex relationship) of the side surface are not fully reflected, but other situations can be deduced from the above examples and should also be regarded as content described in this application.
在一些实施例中,光学系统10中各透镜的材质均为塑料。当然,一些实施例中的各透镜的材质也可均为玻璃。塑料材质的透镜能够减少光学系统10的重量并降低生产成本,而玻璃材质的透镜能够耐受较高的温度且具有优良的光学效果。在另一些实施例中,第一透镜L1的材质为玻璃,而第二透镜L2至第六透镜L6的材质均为塑料,此时,由于光学系统10中位于物方的透镜的材质为玻璃,因此这些位于物方的玻璃透镜对极端环境具有很好耐受效果,不易受物方环境的影响而出现老化等情况,从而当光学系统10处于暴晒高温等极端环境下时,这种结构能够较好地平衡系统的光学性能与成本。当然,光学系统10中透镜材质配置关系并不限于上述实施例,任一透镜的材质可以为塑料,也可以为玻璃,具体设计可根据实际需求而确定。In some embodiments, the material of each lens in the optical system 10 is plastic. Of course, the material of each lens in some embodiments may also be glass. The lens made of plastic can reduce the weight of the optical system 10 and the production cost, while the lens made of glass can withstand higher temperatures and have excellent optical effects. In other embodiments, the material of the first lens L1 is glass, and the material of the second lens L2 to the sixth lens L6 is all plastic. In this case, since the material of the lens on the object side in the optical system 10 is glass, Therefore, these glass lenses located on the object side have a good resistance to extreme environments, and are not easily affected by the object side environment and cause aging. Therefore, when the optical system 10 is in extreme environments such as exposure to high temperatures and other conditions, this structure can be more effective. A good balance between optical performance and cost of the system. Of course, the material configuration relationship of the lenses in the optical system 10 is not limited to the above-mentioned embodiment. The material of any lens can be plastic or glass, and the specific design can be determined according to actual needs.
在一些实施例中,光学系统10包括红外截止滤光片110,红外截止滤光片110设置于第六透镜L6的像侧,并与光学系统10中的各透镜相对固定设置。红外截止滤光片110用于滤除红外光,防止红外光到达系统的成像面S13,从而防止红外光干扰正常成像。红外截止滤光片110可与各透镜一同装配以作为光学系统10中的一部分。在另一些实施例中,红外截止滤光片110并不属于光学系统10的元件,此时红外截止滤光片110可以在光学系统10与感光元件装配成摄像模组时,一并安装至光学系统10与感光元件之间。在一些实施例中,红外截止滤光片110也可设置在第一透镜L1的物侧。另外,在一些实施例中也可通过在第一透镜L1至第六透镜L6中的至少一个透镜上设置滤光镀层以实现滤除红外光的作用。In some embodiments, the optical system 10 includes an infrared cut filter 110 , and the infrared cut filter 110 is disposed on the image side of the sixth lens L6 and is relatively fixed to each lens in the optical system 10 . The infrared cut-off filter 110 is used to filter out infrared light to prevent the infrared light from reaching the imaging surface S13 of the system, thereby preventing the infrared light from interfering with normal imaging. The infrared cut filter 110 may be assembled with each lens as part of the optical system 10 . In other embodiments, the infrared cut-off filter 110 is not a component of the optical system 10 , and the infrared cut-off filter 110 can be installed on the optical system 10 and the photosensitive element to form a camera module. Between the system 10 and the photosensitive element. In some embodiments, the infrared cut filter 110 may also be disposed on the object side of the first lens L1. In addition, in some embodiments, a filter coating layer may also be provided on at least one of the first lens L1 to the sixth lens L6 to achieve the effect of filtering out infrared light.
在本申请的实施例中,光学系统10满足关系:In the embodiment of the present application, the optical system 10 satisfies the relationship:
0.25<SD11/ImgH<0.35;0.25<SD11/ImgH<0.35;
SD11为第一透镜L1的物侧面S1的最大有效半径,ImgH为光学系统10的最大视场角所对应的像高的一半。ImgH也可称为光学系统10于成像面S13有效成像区域的对角线长度的一半。且当光学系统10与图像传感器装配时,ImgH也可理解为图像传感器矩形感光区域的对角线长度的一半。一些实施例中的SD11/ImgH可以为0.27、0.275、0.28、0.285、0.29、0.295或0.3。满足上述SD11/ImgH的关系时,能够使第一透镜L1的物侧面S1孔径与系统的成像面S13大小之间得到合理配置,缩小第一透镜L1的径向尺寸,从而使上述具有六片式结构的光学系统10实现小头部设计,以此可缩小在设备屏幕上的开孔尺寸,进而提高设备的屏占比。另外,满足该关系时也有利于第一透镜L1的加工成型,且有利于扩大光圈,保持系统拥有良好的入光量,从而使系统拥有较高的像质。当SD11/ImgH的关系高于上限时,会导致第一透镜L1的径向尺寸过大,难以实现小头部设计;当低于下限时,入射光线于系统中的偏折程度过大,容易增大离轴像差,不利于提高成像质量。SD11 is the maximum effective radius of the object side surface S1 of the first lens L1 , and ImgH is half of the image height corresponding to the maximum angle of view of the optical system 10 . ImgH can also be referred to as half of the diagonal length of the effective imaging area of the optical system 10 on the imaging plane S13. And when the optical system 10 is assembled with the image sensor, ImgH can also be understood as half of the diagonal length of the rectangular photosensitive area of the image sensor. SD11/ImgH in some embodiments can be 0.27, 0.275, 0.28, 0.285, 0.29, 0.295, or 0.3. When the above relationship of SD11/ImgH is satisfied, the aperture of the object side S1 of the first lens L1 and the size of the imaging surface S13 of the system can be reasonably arranged, and the radial dimension of the first lens L1 can be reduced, so that the above-mentioned six-piece type can be obtained. The structured optical system 10 implements a small head design, thereby reducing the size of the opening on the screen of the device, thereby increasing the screen-to-body ratio of the device. In addition, satisfying this relationship is also conducive to the processing and molding of the first lens L1, and is also conducive to expanding the aperture, keeping the system with a good amount of incident light, so that the system has a high image quality. When the relationship between SD11/ImgH is higher than the upper limit, the radial dimension of the first lens L1 will be too large, making it difficult to achieve a small head design; Increasing off-axis aberration is not conducive to improving image quality.
此外,在一些实施例中,光学系统10还满足以下至少一个关系,且当满足任一关系式时均能带来相应的效果:In addition, in some embodiments, the optical system 10 also satisfies at least one of the following relationships, and when any relationship is satisfied, it can bring corresponding effects:
5<f3/f<45;f3为第三透镜L3的有效焦距,f为光学系统10的有效焦距。一些实施例中的f3/f可以为10、10.5、13、15、17、20、25、30、35、40、41、42或42.5。满足上述关系时,第三透镜L3可加强系统对光线的聚焦能力,实现良好的成像品质,同时有利于缩短系统总长。当f3/f≤5.0时,第三透镜L3正屈折力太强,导致像方透镜修正像差能力不足,产生高阶像差,影响镜头的成像品质。当f3/f≥45时,第三透镜L3的等效正屈折力不足,导致系统的总长难以缩短,不利于小型化设计。5<f3/f<45; f3 is the effective focal length of the third lens L3 , and f is the effective focal length of the optical system 10 . The f3/f in some embodiments may be 10, 10.5, 13, 15, 17, 20, 25, 30, 35, 40, 41, 42, or 42.5. When the above relationship is satisfied, the third lens L3 can enhance the focusing ability of the system to light, achieve good imaging quality, and at the same time help to shorten the total length of the system. When f3/f≤5.0, the positive refractive power of the third lens L3 is too strong, resulting in insufficient aberration correction capability of the image-side lens, resulting in high-order aberrations, affecting the imaging quality of the lens. When f3/f≥45, the equivalent positive refractive power of the third lens L3 is insufficient, which makes it difficult to shorten the total length of the system, which is not conducive to miniaturized design.
1.25<TTL/ImgH<1.35;TTL为第一透镜L1的物侧面S1至光学系统10的成像面S13于光轴上的距离。一些实施例中的TTL/ImgH可以为1.28、1.29、1.3、1.31或1.32。满足上述关系时,可满足在大像面上的高质量成像效果,同时可有效减小光学系统10的总长度,从而实现系统于轴向上的小型化设计。1.25<TTL/ImgH<1.35; TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S13 of the optical system 10 . The TTL/ImgH in some embodiments may be 1.28, 1.29, 1.3, 1.31 or 1.32. When the above relationship is satisfied, a high-quality imaging effect on a large image plane can be satisfied, and at the same time, the total length of the optical system 10 can be effectively reduced, thereby realizing a miniaturized design of the system in the axial direction.
0.65<ET56/CT56<1.65;ET56为第五透镜L5的像侧面S10最大有效径处至第六透镜L6的物侧面S11最大有效径处于光轴方向的距离,CT56为第五透镜L5的像侧面S10至第六透镜L6的物侧面S11于光轴上的距离。一些实施例中的ET56/CT56可以为0.7、0.72、0.75、0.8、0.9、1、1.2、1.4、1.5、1.55或1.58。满足上述关系式时,有利于第五透镜L5和第六透镜L6之间的结构设计,减小第五透镜L5与第六透镜L6在边缘上的间隔,从而有利于使两个透镜的延伸部能够形成扣合或堆叠结构,以此省略隔圈,进而,降低制造成本,另外也可避免第五透镜L5与第六透镜L6之间间隔过小而导致系统敏感度增大,影响系统的成像品质,以此可较好地避免镜头组装良率下降。0.65<ET56/CT56<1.65; ET56 is the distance from the maximum effective diameter of the image side S10 of the fifth lens L5 to the maximum effective diameter of the object side S11 of the sixth lens L6 in the direction of the optical axis, and CT56 is the image side of the fifth lens L5 The distance from S10 to the object side surface S11 of the sixth lens L6 on the optical axis. ET56/CT56 in some embodiments may be 0.7, 0.72, 0.75, 0.8, 0.9, 1, 1.2, 1.4, 1.5, 1.55, or 1.58. When the above relationship is satisfied, it is beneficial to the structural design between the fifth lens L5 and the sixth lens L6, and the distance between the fifth lens L5 and the sixth lens L6 on the edge is reduced, so as to facilitate the extension of the two lenses. A snap-fit or stacking structure can be formed, thereby omitting the spacer, thereby reducing the manufacturing cost, and it can also avoid that the interval between the fifth lens L5 and the sixth lens L6 is too small, which increases the sensitivity of the system and affects the imaging of the system. quality, which can better avoid the decline of lens assembly yield.
f/EPD≤2.1;f为光学系统10的有效焦距,EPD为光学系统10的入瞳直径。一些实施例中的f/EPD可以为1.9、1.92、1.94、1.96、1.98、2、2.03、2.05。满足上述关系时,光学系统10具有大光圈的特点,从而可以增加系统单位时间内的光通量,增强暗环境下的成像效果。f/EPD≦2.1; f is the effective focal length of the optical system 10 , and EPD is the entrance pupil diameter of the optical system 10 . The f/EPD in some embodiments may be 1.9, 1.92, 1.94, 1.96, 1.98, 2, 2.03, 2.05. When the above relationship is satisfied, the optical system 10 has the characteristics of a large aperture, so that the luminous flux per unit time of the system can be increased, and the imaging effect in a dark environment can be enhanced.
-2.0<f2/R4<-1.0;f2为第二透镜L2的有效焦距,R4为第二透镜L2的像侧面S4于光轴处的曲率半径。一些实施例中的f2/R4可以为-1.75、-1.70、-1.65、-1.6、-1.5、-1.45、-1.4或-1.38。满足上述关系时的第二透镜L2可平衡第一透镜L1产生的正球差,实现良好的成像品质,同时有利于光线的发散,扩大视场角,缩短系统总长。当f2/R4<-2.0时,第二透镜L2提供的负屈折力不足,修正系统球差像差困难,且第二透镜L2的像侧面S4过于弯曲,容易造成透镜公差敏感。当f2/R4>-1.0时,第二透镜L2的负屈折力过强,对光线过度发散,不利于系统总长的缩短,另外容易对第一透镜L1所产生的像差校正过度,从而降低成像质量。-2.0<f2/R4<-1.0; f2 is the effective focal length of the second lens L2, and R4 is the radius of curvature of the image side S4 of the second lens L2 at the optical axis. f2/R4 in some embodiments may be -1.75, -1.70, -1.65, -1.6, -1.5, -1.45, -1.4, or -1.38. When the above relationship is satisfied, the second lens L2 can balance the positive spherical aberration generated by the first lens L1 to achieve good imaging quality, and at the same time, it is beneficial to the divergence of light rays, expands the field of view, and shortens the total length of the system. When f2/R4<-2.0, the negative refractive power provided by the second lens L2 is insufficient, it is difficult to correct the spherical aberration of the system, and the image side S4 of the second lens L2 is too curved, which is likely to cause lens tolerance sensitivity. When f2/R4>-1.0, the negative refractive power of the second lens L2 is too strong, and the light is too divergent, which is not conducive to shortening the total length of the system. In addition, it is easy to overcorrect the aberration generated by the first lens L1, thereby reducing imaging quality.
1.0mm<(R8/R7)*|R8-R7|<180.0mm;R7为第四透镜L4的物侧面S7于光轴处的曲率半径,R8为第四透镜L4的像侧面S8于光轴处的曲率半径。一些实施例中的(R8/R7)*|R8-R7|可以为1.5、2、4、5、10、30、50、60、70、100、130、150、155、158或160,数值单位为mm。满足上述关系时,第四透镜L4的物侧面S7的曲率半径和第四透镜L4的像侧面S8的曲率半径能够得到合适的配置,使第四透镜L4的形状不会过于弯曲,从而在矫正系统像散像差的同时,还能够降低系统敏感度,有利于提升产品良率。1.0mm<(R8/R7)*|R8-R7|<180.0mm; R7 is the curvature radius of the object side S7 of the fourth lens L4 at the optical axis, R8 is the image side S8 of the fourth lens L4 at the optical axis the radius of curvature. (R8/R7)*|R8-R7| in some embodiments may be 1.5, 2, 4, 5, 10, 30, 50, 60, 70, 100, 130, 150, 155, 158, or 160, in numerical units is mm. When the above relationship is satisfied, the curvature radius of the object side surface S7 of the fourth lens L4 and the curvature radius of the image side surface S8 of the fourth lens L4 can be appropriately configured, so that the shape of the fourth lens L4 will not be too curved, so that the correction system can be used. While astigmatic aberration can be reduced, the sensitivity of the system can also be reduced, which is beneficial to improve product yield.
5.0mm<(f5/f6)*R11<20.0mm;f5为第五透镜L5的有效焦距,f6为第六透镜L6的有效焦距,R11为第六透镜L6的物侧面S11于光轴处的曲率半径。一些实施例中的(f5/f6)*R11可以为10.5、11、11.5、12、12.5、13、14、14.5、15或15.2,数值单位为mm。满足上述关系时,控制第五透镜L5的有效焦距与第六透镜L6的有效焦距的比值,可有效修正系统像散像差,对第六透镜L6的物侧面S11曲率半径的修正,能够减小光线进入到第六透镜L6物侧面S11的入射角,从而避免杂光鬼像的产生,并且有利于压缩光学镜头的总长,实现薄型化特点。5.0mm<(f5/f6)*R11<20.0mm; f5 is the effective focal length of the fifth lens L5, f6 is the effective focal length of the sixth lens L6, and R11 is the curvature of the object side S11 of the sixth lens L6 at the optical axis radius. (f5/f6)*R11 in some embodiments may be 10.5, 11, 11.5, 12, 12.5, 13, 14, 14.5, 15, or 15.2, and the numerical unit is mm. When the above relationship is satisfied, controlling the ratio of the effective focal length of the fifth lens L5 to the effective focal length of the sixth lens L6 can effectively correct the system astigmatic aberration, and the correction of the curvature radius of the object side S11 of the sixth lens L6 can reduce the The light enters the incident angle of the object side S11 of the sixth lens L6, thereby avoiding the generation of stray light ghost images, and is conducive to compressing the total length of the optical lens and realizing the characteristics of thinning.
2.5<CT5/|SAG51|<5.5;CT5为第五透镜L5于光轴上的厚度,SAG51为第五透镜L5的物侧面S9于最大有效半径处的矢高。一些实施例中的CT5/|SAG51|可以为3.1、3.3、3.5、3.8、4、4.2、4.5、4.8、5或5.1。满足上述关系时,第五透镜L5的形状能够得到良好的控制,从而有利于透镜的制造及成型,减少成型不良的缺陷。同时,也可修整物方各透镜所产生的场曲,保证系统场曲的平衡,即不同视场的场曲大小趋于平衡,以此可使整个系统画面的画质均匀,进而提高光学系统10的成像质量。当CT5/|SAG51|<2.5时,第五透镜L5的物侧面S9于圆周处的面型过度弯曲,会导致成型不良,影响制造良率。当CT5/|SAG51|>5.5时,第五透镜L5的物侧面S9于圆周处的面型过于平滑,对轴外视场光线的偏折能力不足,不利于畸变和场曲像差的矫正。2.5<CT5/|SAG51|<5.5; CT5 is the thickness of the fifth lens L5 on the optical axis, and SAG51 is the sagittal height of the object side surface S9 of the fifth lens L5 at the maximum effective radius. CT5/|SAG51| in some embodiments may be 3.1, 3.3, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, or 5.1. When the above relationship is satisfied, the shape of the fifth lens L5 can be well controlled, which is beneficial to the manufacture and molding of the lens, and reduces the defects of poor molding. At the same time, the field curvature generated by each lens on the object side can also be trimmed to ensure the balance of the field curvature of the system, that is, the field curvatures of different fields of view tend to be balanced, so that the image quality of the entire system can be uniform, thereby improving the optical system. 10 image quality. When CT5/|SAG51|<2.5, the surface shape of the object side surface S9 of the fifth lens L5 at the circumference is excessively curved, which will lead to poor molding and affect the manufacturing yield. When CT5/|SAG51|>5.5, the surface shape of the object side S9 of the fifth lens L5 at the circumference is too smooth, and the deflection ability of off-axis field rays is insufficient, which is not conducive to the correction of distortion and field curvature aberration.
应注意的是,上述矢高为第五透镜L5的物侧面S9中心(即物侧面S9与光轴的交点)至该面的最大有效通光口径处(即该面最大有效半径处)于平行光轴方向上的距离;当该值为正值时,在平行于系统的光轴的方向上,该面的最大有效通光口径处相较于该面的中心处更靠近系统的像侧;当该值为负值时,在平行于系统的光轴的方向上,该面的最大有效通光口径处相较于该面的中心处更靠近系统的物侧。It should be noted that the above-mentioned sagittal height is the center of the object side S9 of the fifth lens L5 (that is, the intersection of the object side S9 and the optical axis) to the maximum effective light aperture of the surface (that is, the maximum effective radius of the surface) in parallel light. The distance in the axis direction; when the value is positive, in the direction parallel to the optical axis of the system, the maximum effective clear aperture of the surface is closer to the image side of the system than the center of the surface; when When the value is negative, in the direction parallel to the optical axis of the system, the maximum effective clear aperture of the surface is closer to the object side of the system than the center of the surface.
0.85mm<FFL<1.30mm;FFL为第六透镜L6的像侧面S12至光学系统10的成像面S13于光轴方向的最小距离。一些实施例中的FFL可以为0.9、0.95、1、1.05、1.1、1.15、1.2或1.25,数值单位为mm。满足上述关系时,有利于维持系统的小型化,且确保透镜组与图像传感器装配时有足够的调焦范 围。当FFL<0.85mm时,第六透镜L6的像侧面S12于系统成像面S13之间的距离过短,容易导致光线到达成像面S13时的入射角过大,影响图像传感器接收光线的效率,降低成像品质。当FFL>1.3mm时,光学系统10的总长难以缩短,不利于维持系统小型化的特点。0.85mm<FFL<1.30mm; FFL is the minimum distance in the optical axis direction from the image side surface S12 of the sixth lens L6 to the imaging surface S13 of the optical system 10 . The FFL in some embodiments may be 0.9, 0.95, 1, 1.05, 1.1, 1.15, 1.2, or 1.25, with values in mm. When the above relationship is satisfied, it is beneficial to maintain the miniaturization of the system, and to ensure a sufficient focusing range when the lens group and the image sensor are assembled. When FFL<0.85mm, the distance between the image side S12 of the sixth lens L6 and the imaging surface S13 of the system is too short, which easily causes the incident angle of the light to reach the imaging surface S13 to be too large, which affects the efficiency of the image sensor to receive light and reduces the Image quality. When FFL>1.3 mm, it is difficult to shorten the total length of the optical system 10, which is not conducive to maintaining the characteristics of the miniaturization of the system.
ImgH≥4.8mm;此时光学系统10拥有大像面特性,从而可与大尺寸的图像传感器进行配合,进而提高成像质量。ImgH≥4.8mm; at this time, the optical system 10 has the characteristics of a large image plane, so that it can cooperate with a large-sized image sensor, thereby improving the imaging quality.
接下来以更为具体详细的实施例来对本申请的光学系统10进行说明:Next, the optical system 10 of the present application will be described with more specific and detailed embodiments:
第一实施例first embodiment
参考图1和图2,在第一实施例中,光学系统10由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有正屈折力的第五透镜L5及具有负屈折力的第六透镜L6。图2包括第一实施例中光学系统10的纵向球差图、像散图和畸变图,其中的像散图和畸变图的参考波长为587.56nm。Referring to FIGS. 1 and 2 , in the first embodiment, the optical system 10 includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side. The third lens L3 with positive refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with positive refractive power, and the sixth lens L6 with negative refractive power. FIG. 2 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the first embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
第一透镜L1的物侧面S1于近轴处为凸面,像侧面S2于近轴处为凹面;物侧面S1于圆周处为凸面,像侧面S2于圆周处为凸面。The object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is convex at the circumference.
第二透镜L2的物侧面S3于近轴处为凹面,像侧面S4于近轴处为凹面;物侧面S3于圆周处为凹面,像侧面S4于圆周处为凹面。The object side S3 of the second lens L2 is concave at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is concave at the circumference, and the image side S4 is concave at the circumference.
第三透镜L3的物侧面S5于近轴处为凹面,像侧面S6于近轴处为凸面;物侧面S5于圆周处为凹面,像侧面S6于圆周处为凸面。The object side S5 of the third lens L3 is concave at the paraxial position, and the image side S6 is convex at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面;物侧面S7于圆周处为凹面,像侧面S8于圆周处为凸面。The object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
第五透镜L5的物侧面S9于近轴处为凹面,像侧面S10于近轴处为凸面;物侧面S9于圆周处为凹面,像侧面S10于圆周处为凸面。The object side S9 of the fifth lens L5 is concave at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
第六透镜L6的物侧面S11于近轴处为凹面,像侧面S12于近轴处为凹面;物侧面S11于圆周处为凸面,像侧面S12于圆周处为凸面。The object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
第一透镜L1至第六透镜L6中各透镜的物侧面和像侧面均为非球面。通过配合光学系统10中各透镜的非球面面型,从而能够有效解决光学系统10视界歪曲的问题,也能够使透镜在较小、较薄的情况下实现优良的光学效果,进而使光学系统10具有更小的体积,有利于光学系统10实现小型化设计。另外,光学系统10中各透镜的材质均为塑料。The object side surface and the image side surface of each of the first lens L1 to the sixth lens L6 are aspherical. By matching the aspherical surface type of each lens in the optical system 10, the problem of the distortion of the field of view of the optical system 10 can be effectively solved, and the lens can also achieve excellent optical effects in the case of a small and thin lens, thereby enabling the optical system 10 to achieve an excellent optical effect. Having a smaller volume is beneficial to realize the miniaturized design of the optical system 10 . In addition, the material of each lens in the optical system 10 is plastic.
应注意的是,在第一实施例至第五实施例中,第五透镜L5的物侧面S9和像侧面S10不存在反曲点,而第六透镜L6的物侧面S11和像侧面S12设有反曲点。从而,可简化第五透镜L5的制备难度,使校正各视场像差的能力更多地集中至系统的最后一个透镜。It should be noted that, in the first to fifth embodiments, the object side S9 and the image side S10 of the fifth lens L5 do not have inflection points, while the object side S11 and the image side S12 of the sixth lens L6 are provided with Inflection point. Therefore, the manufacturing difficulty of the fifth lens L5 can be simplified, and the ability to correct the aberrations of each field of view can be concentrated more on the last lens of the system.
光学系统10的各透镜参数由以下的表1和表2给出。表2为表1中各透镜相应表面的非球面系数,其中k为圆锥系数,Ai为非球面面型公式中与第i项高次项相对应的系数。由物面至像面(成像面S13,也可理解为后期装配时感光元件的感光表面)的各元件依次按照表1从上至下的各元件的顺序排列。但应注意的是,当描述由物侧至像侧依次包括孔径光阑STO和第一透镜L1时,并不代表孔径光阑STO于光轴上的投影只能在第一透镜L1的投影的物方,其中也包括了孔径光阑STO和第一透镜L1的物侧面于光轴上的投影重叠的情况,例如图1的设置方式。面序号2和3所对应的表面分别表示第一透镜L1的物侧面S1和像侧面S2,即同一透镜中,面序号较小的表面为物侧面,面序号较大的表面为像侧面。表1中的Y半径为相应面序号的物侧面或像侧面于光轴上的曲率半径。透镜于“厚度”参数列中的第一个数值的绝对值为该透镜于光轴上的厚度,第二个数值的绝对值为该透镜的像侧面至后一光学元件的物侧面于光轴上的距离。本申请实施例中的各透镜的光轴处于同一直线上,该直线作为光学系统10的光轴。需注意的是,以下各实施例中,红外截止滤光片110(即表格中的红外滤光片)可以作为光学系统10中的元件,也可以不作为光学系统10中的元件,但无论何种情况,第六透镜L6的像侧面S12至成像面S13的距离均应算入表格中红外截止滤光片110所对应的厚度参数的数值。The respective lens parameters of the optical system 10 are given in Tables 1 and 2 below. Table 2 shows the aspheric coefficients of the corresponding surfaces of the lenses in Table 1, where k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface formula. The elements from the object plane to the image plane (the imaging plane S13, which can also be understood as the photosensitive surface of the photosensitive element in the later assembly) are sequentially arranged in the order of the elements in Table 1 from top to bottom. However, it should be noted that when the description includes the aperture stop STO and the first lens L1 in sequence from the object side to the image side, it does not mean that the projection of the aperture stop STO on the optical axis can only be performed on the projection of the first lens L1. The object side also includes the case where the projection of the object side of the aperture stop STO and the object side of the first lens L1 on the optical axis overlaps, such as the arrangement in FIG. 1 . The surfaces corresponding to surface numbers 2 and 3 respectively represent the object side S1 and the image side S2 of the first lens L1, that is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side. The Y radius in Table 1 is the curvature radius of the object side or image side of the corresponding surface number on the optical axis. The absolute value of the first value of the lens in the "Thickness" parameter column is the thickness of the lens on the optical axis, and the absolute value of the second value is the image side of the lens to the object side of the following optical element on the optical axis. on the distance. The optical axes of the lenses in the embodiments of the present application are on the same straight line, and the straight line serves as the optical axis of the optical system 10 . It should be noted that, in the following embodiments, the infrared cut-off filter 110 (ie, the infrared filter in the table) can be used as a component in the optical system 10 or not as a component in the optical system 10, but no matter what In this case, the distance from the image side S12 of the sixth lens L6 to the image surface S13 should be calculated into the value of the thickness parameter corresponding to the infrared cut filter 110 in the table.
在第一实施例中,光学系统10的有效焦距f=5.4mm,光圈数FNO=2.07,最大视场角的一半(即对 角线方向最大视角的一半)HFOV=82.0°,光学总长TTL=6.268mm,最大视场角所对应的像高的一半ImgH=4.82mm。当装配有图像传感器时,ImgH也可理解为图像传感器的矩形有效像素区域的对角线长的一半,且光学系统10的对角线方向平行于该有效像素区域的对角线方向。In the first embodiment, the effective focal length of the optical system 10 is f=5.4mm, the aperture number FNO=2.07, the half of the maximum angle of view (that is, the half of the maximum angle of view in the diagonal direction) HFOV=82.0°, and the total optical length TTL= 6.268mm, half of the image height corresponding to the maximum angle of view ImgH=4.82mm. When equipped with an image sensor, ImgH can also be understood as half the diagonal length of the rectangular effective pixel area of the image sensor, and the diagonal direction of the optical system 10 is parallel to the diagonal direction of the effective pixel area.
另外,在以下各实施例(第一实施例至第五实施例)的参数表格中,各透镜的折射率、阿贝数和焦距的参考波长均为587.56nm。另外,各实施例的关系式计算和透镜结构以透镜参数(如表1、表2、表3、表4等)为准。In addition, in the parameter tables of the following embodiments (first embodiment to fifth embodiment), the reference wavelengths of the refractive index, Abbe number, and focal length of each lens are all 587.56 nm. In addition, the relational formula calculation and lens structure of each embodiment are based on lens parameters (such as Table 1, Table 2, Table 3, Table 4, etc.).
表1Table 1
表2Table 2
在第一实施例中,光学系统10满足以下各关系:In the first embodiment, the optical system 10 satisfies the following relationships:
SD11/ImgH=0.27;SD11/ImgH=0.27;
ImgH=4.82mm;ImgH=4.82mm;
SD11为第一透镜L1的物侧面S1的最大有效半径,ImgH为光学系统10的最大视场角所对应的像高的一半。满足上述SD11/ImgH的关系时,能够使第一透镜L1的物侧面S1孔径与系统的成像面S13大小之间得到合理配置,缩小第一透镜L1的径向尺寸,从而使上述具有六片式结构的光学系统10实现小头部设计,以此可缩小在设备屏幕上的开孔尺寸,进而提高设备的屏占比。另外,满足该关系时也有利于第一透镜L1的加工成型,且有利于扩大光圈,保持系统拥有良好的入光量,从而使光学系统10拥有良好的像质。进一步地,光学系统10也能配合ImgH的关系以实现大像面的特点,进而有利于使系统拥有较高的像质。SD11 is the maximum effective radius of the object side surface S1 of the first lens L1 , and ImgH is half of the image height corresponding to the maximum angle of view of the optical system 10 . When the above relationship of SD11/ImgH is satisfied, the aperture of the object side S1 of the first lens L1 and the size of the imaging surface S13 of the system can be reasonably arranged, and the radial dimension of the first lens L1 can be reduced, so that the above-mentioned six-piece type can be obtained. The structured optical system 10 implements a small head design, thereby reducing the size of the opening on the screen of the device, thereby increasing the screen-to-body ratio of the device. In addition, satisfying this relationship is also beneficial to the processing and molding of the first lens L1, and is beneficial to expanding the aperture, keeping the system with a good amount of incident light, so that the optical system 10 has a good image quality. Further, the optical system 10 can also cooperate with the relationship of ImgH to realize the feature of a large image plane, which is beneficial to make the system have a higher image quality.
f3/f=17.01;f3为第三透镜L3的有效焦距,f为光学系统10的有效焦距。满足上述关系时,第三透镜L3可加强系统对光线的聚焦能力,实现良好的成像品质,同时有利于缩短系统总长。f3/f=17.01; f3 is the effective focal length of the third lens L3 , and f is the effective focal length of the optical system 10 . When the above relationship is satisfied, the third lens L3 can enhance the focusing ability of the system to light, achieve good imaging quality, and at the same time help to shorten the total length of the system.
TTL/ImgH=1.3;TTL为第一透镜L1的物侧面至光学系统10的成像面S13于光轴上的距离。满足上述关系时,可满足在大像面上的高质量成像效果,同时可有效减小光学系统10的总长度,从而实现系统于轴向上的小型化设计。TTL/ImgH=1.3; TTL is the distance on the optical axis from the object side surface of the first lens L1 to the imaging surface S13 of the optical system 10 . When the above relationship is satisfied, a high-quality imaging effect on a large image plane can be satisfied, and at the same time, the total length of the optical system 10 can be effectively reduced, thereby realizing a miniaturized design of the system in the axial direction.
ET56/CT56=0.723;ET56为第五透镜L5的像侧面S10最大有效径处至第六透镜L6的物侧面S11最大有效径处于光轴方向的距离,CT56为第五透镜L5的像侧面S10至第六透镜L6的物侧面S11于光轴上的距离。满足上述关系式时,有利于第五透镜L5和第六透镜L6之间的结构设计,减小第五透镜L5与第六透镜L6在边缘上的间隔,从而有利于使两个透镜的延伸部能够形成扣合或堆叠结构,以此省略隔圈,进而降低制造成本,另外也可避免第五透镜L5与第六透镜L6之间间隔过小而导致系统敏感度增大,影响系统的成像品质,以此可较好地避免镜头组装良率下降。ET56/CT56=0.723; ET56 is the distance from the maximum effective diameter of the image side S10 of the fifth lens L5 to the maximum effective diameter of the object side S11 of the sixth lens L6 in the optical axis direction, and CT56 is the image side of the fifth lens L5 S10 to The distance of the object side surface S11 of the sixth lens L6 on the optical axis. When the above relationship is satisfied, it is beneficial to the structural design between the fifth lens L5 and the sixth lens L6, and the distance between the fifth lens L5 and the sixth lens L6 on the edge is reduced, so as to facilitate the extension of the two lenses. A snap-fit or stacking structure can be formed, so as to omit the spacer, thereby reducing the manufacturing cost. In addition, it can also avoid that the interval between the fifth lens L5 and the sixth lens L6 is too small, which will increase the sensitivity of the system and affect the imaging quality of the system. , so that the lens assembly yield decline can be better avoided.
f/EPD=2.07;f为光学系统10的有效焦距,EPD为光学系统10的入瞳直径。满足上述关系时,光学系统10具有大光圈的特点,从而可以增加系统单位时间内的光通量,增强暗环境下的成像效果。f/EPD=2.07; f is the effective focal length of the optical system 10 , and EPD is the entrance pupil diameter of the optical system 10 . When the above relationship is satisfied, the optical system 10 has the characteristics of a large aperture, so that the luminous flux per unit time of the system can be increased, and the imaging effect in a dark environment can be enhanced.
f2/R4=-1.365;f2为第二透镜L2的有效焦距,R4为第二透镜L2的像侧面S4于光轴处的曲率半径。满足上述关系时的第二透镜L2可平衡第一透镜L1产生的正球差,实现良好的成像品质,同时有利于光线的发散,扩大视场角,缩短系统总长。f2/R4=-1.365; f2 is the effective focal length of the second lens L2, and R4 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis. When the above relationship is satisfied, the second lens L2 can balance the positive spherical aberration generated by the first lens L1 to achieve good imaging quality, and at the same time, it is beneficial to the divergence of light rays, expands the field of view, and shortens the total length of the system.
(R8/R7)*|R8-R7|=1.402mm;R7为第四透镜L4的物侧面S7于光轴处的曲率半径,R8为第四透镜L4的像侧面S8于光轴处的曲率半径。满足上述关系时,第四透镜L4的物侧面S7的曲率半径和第四透镜L4的像侧面S8的曲率半径能够得到合适的配置,使第四透镜L4的形状不会过于弯曲,从而在矫正系统像散像差的同时,还能够降低系统敏感度,有利于提升产品良率。(R8/R7)*|R8-R7|=1.402mm; R7 is the curvature radius of the object side S7 of the fourth lens L4 at the optical axis, R8 is the curvature radius of the image side S8 of the fourth lens L4 at the optical axis . When the above relationship is satisfied, the curvature radius of the object side surface S7 of the fourth lens L4 and the curvature radius of the image side surface S8 of the fourth lens L4 can be appropriately configured, so that the shape of the fourth lens L4 will not be too curved, so that the correction system can be used. While astigmatic aberration can be reduced, the sensitivity of the system can also be reduced, which is beneficial to improve product yield.
(f5/f6)*R11=10.47mm;f5为第五透镜L5的有效焦距,f6为第六透镜L6的有效焦距,R11为第六透镜L6的物侧面S11于光轴处的曲率半径。满足上述关系时,控制第五透镜L5的有效焦距与第六透镜L6的有效焦距的比值,可有效修正系统像散像差,对第六透镜L6的物侧面S11曲率半径的修正, 能够减小光线进入到第六透镜L6物侧面S11的入射角,从而避免杂光鬼像的产生,并且有利于压缩光学镜头的总长,实现薄型化特点。(f5/f6)*R11=10.47mm; f5 is the effective focal length of the fifth lens L5, f6 is the effective focal length of the sixth lens L6, and R11 is the curvature radius of the object side S11 of the sixth lens L6 at the optical axis. When the above relationship is satisfied, controlling the ratio of the effective focal length of the fifth lens L5 to the effective focal length of the sixth lens L6 can effectively correct the system astigmatic aberration, and the correction of the curvature radius of the object side S11 of the sixth lens L6 can reduce the The light enters the incident angle of the object side S11 of the sixth lens L6, thereby avoiding the generation of stray light ghost images, and is conducive to compressing the total length of the optical lens and realizing the characteristics of thinning.
CT5/|SAG51|=3.064;CT5为第五透镜L5于光轴上的厚度,SAG51为第五透镜L5的物侧面S9于最大有效半径处的矢高。满足上述关系时,第五透镜L5的形状能够得到良好的控制,从而有利于透镜的制造及成型,减少成型不良的缺陷。同时,也可修整物方各透镜所产生的场曲,保证系统场曲的平衡,即不同视场的场曲大小趋于平衡,以此可使整个系统画面的画质均匀,进而提高光学系统10的成像质量。CT5/|SAG51|=3.064; CT5 is the thickness of the fifth lens L5 on the optical axis, and SAG51 is the sag of the object side surface S9 of the fifth lens L5 at the maximum effective radius. When the above relationship is satisfied, the shape of the fifth lens L5 can be well controlled, which is beneficial to the manufacture and molding of the lens, and reduces the defects of poor molding. At the same time, the field curvature generated by each lens on the object side can also be trimmed to ensure the balance of the field curvature of the system, that is, the field curvatures of different fields of view tend to be balanced, so that the image quality of the entire system can be uniform, thereby improving the optical system. 10 image quality.
FFL=1.258mm;FFL为第六透镜L6的像侧面S12至光学系统10的成像面S13于光轴方向的最小距离。满足上述关系时,有利于维持系统的小型化,且确保透镜组与图像传感器装配时有足够的调焦范围。FFL=1.258mm; FFL is the minimum distance in the optical axis direction from the image side surface S12 of the sixth lens L6 to the imaging surface S13 of the optical system 10 . When the above relationship is satisfied, it is beneficial to maintain the miniaturization of the system, and ensure a sufficient focus range when the lens group and the image sensor are assembled.
另外,图2包括光学系统10的纵向球面像差图(Longitudinal Spherical Aberration),其表示不同波长的光线经由镜头后的汇聚焦点偏离。纵向球面像差图的纵坐标表示归一化的由光瞳中心至光瞳边缘的光瞳坐标(Normalized Pupil Coordinator),横坐标表示成像面S13到光线与光轴交点的距离(单位为mm)。由纵向球面像差图可知,第一实施例中的各波长光线的汇聚焦点偏离程度趋于一致,成像画面中的弥散斑或色晕得到有效抑制。图2还包括光学系统10的场曲图(Astigmatic Field Curves),其中S曲线代表587.56nm下的弧矢场曲,T曲线代表587.56nm下的子午场曲。由图中可知,系统的场曲较小,各视场的场曲和像散均得到了良好的校正,视场中心和边缘均拥有清晰的成像。图2还包括光学系统10的畸变图(Distortion),由图中可知,由主光束引起的图像变形较小,系统的成像质量优良。In addition, FIG. 2 includes a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the optical system 10, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. The ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane S13 to the intersection of the light and the optical axis (unit is mm) . It can be seen from the longitudinal spherical aberration diagram that in the first embodiment, the degree of deviation of the converging focus of each wavelength light tends to be the same, and the smear or color halo in the imaging picture is effectively suppressed. FIG. 2 also includes a field curvature diagram (Astigmatic Field Curves) of the optical system 10, wherein the S curve represents the sagittal field curvature at 587.56 nm, and the T curve represents the meridional field curvature at 587.56 nm. It can be seen from the figure that the field curvature of the system is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images. FIG. 2 also includes a distortion diagram (Distortion) of the optical system 10. It can be seen from the diagram that the image distortion caused by the main beam is small, and the imaging quality of the system is excellent.
第二实施例Second Embodiment
参考图3和图4,在第二实施例中,光学系统10由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5及具有负屈折力的第六透镜L6。图4包括第二实施例中光学系统10的纵向球差图、像散图和畸变图,其中的像散图和畸变图的参考波长为587.56nm。3 and 4 , in the second embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side. The third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, and the sixth lens L6 with negative refractive power. FIG. 4 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the second embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
第一透镜L1的物侧面S1于近轴处为凸面,像侧面S2于近轴处为凹面;物侧面S1于圆周处为凸面,像侧面S2于圆周处为凹面。The object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
第二透镜L2的物侧面S3于近轴处为凸面,像侧面S4于近轴处为凹面;物侧面S3于圆周处为凸面,像侧面S4于圆周处为凹面。The object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
第三透镜L3的物侧面S5于近轴处为凸面,像侧面S6于近轴处为凹面;物侧面S5于圆周处为凹面,像侧面S6于圆周处为凸面。The object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面;物侧面S7于圆周处为凹面,像侧面S8于圆周处为凸面。The object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
第五透镜L5的物侧面S9于近轴处为凸面,像侧面S10于近轴处为凸面;物侧面S9于圆周处为凹面,像侧面S10于圆周处为凸面。The object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
第六透镜L6的物侧面S11于近轴处为凹面,像侧面S12于近轴处为凹面;物侧面S11于圆周处为凹面,像侧面S12于圆周处为凸面。The object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is concave at the circumference, and the image side S12 is convex at the circumference.
另外,第二实施例中光学系统10的各透镜参数由表3和表4给出,其中各结构和参数的定义可由第一实施例中得出,此处不加以赘述。In addition, the lens parameters of the optical system 10 in the second embodiment are given in Table 3 and Table 4, wherein the definitions of the structures and parameters can be obtained from the first embodiment, and will not be repeated here.
表3table 3
表4Table 4
该实施例中的摄像模组10满足以下关系:The camera module 10 in this embodiment satisfies the following relationship:
SD11/ImgHSD11/ImgH | 0.290.29 | (R8/R7)*|R8-R7|(R8/R7)*|R8-R7| | 5.8565.856 |
f3/ff3/f | 42.0242.02 | (f5/f6)*R11(f5/f6)*R11 | 11.811.8 |
TTL/ImgHTTL/ImgH | 1.3231.323 | CT5/|SAG51|CT5/|SAG51| | 5.1895.189 |
ET56/CT56ET56/CT56 | 1.3761.376 | FFLFFL | 0.9520.952 |
f/EPDf/EPD | 1.931.93 | f2/R4f2/R4 | -1.743-1.743 |
由图4中的像差图可知,光学系统10的纵向球差、场曲和畸变均得到良好的控制,从而该实施例的光学系统10拥有良好的成像品质。It can be seen from the aberration diagram in FIG. 4 that the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, so that the optical system 10 of this embodiment has good imaging quality.
第三实施例Third Embodiment
参考图5和图6,在第三实施例中,光学系统10由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5及具有负屈折力的第六透镜L6。图6包括第三实施例中光学系统10的纵向球差图、像散图和畸变图,其中的像散图和畸变图的参考波长为587.56nm。5 and 6 , in the third embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side. The third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, and the sixth lens L6 with negative refractive power. FIG. 6 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the third embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
第一透镜L1的物侧面S1于近轴处为凸面,像侧面S2于近轴处为凹面;物侧面S1于圆周处为凸面,像侧面S2于圆周处为凹面。The object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
第二透镜L2的物侧面S3于近轴处为凸面,像侧面S4于近轴处为凹面;物侧面S3于圆周处为凸面,像侧面S4于圆周处为凹面。The object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
第三透镜L3的物侧面S5于近轴处为凸面,像侧面S6于近轴处为凹面;物侧面S5于圆周处为凹面,像侧面S6于圆周处为凸面。The object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面;物侧面S7于圆周处为凹面,像侧面S8于圆周处为凸面。The object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
第五透镜L5的物侧面S9于近轴处为凸面,像侧面S10于近轴处为凸面;物侧面S9于圆周处为凸面,像侧面S10于圆周处为凸面。The object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is convex at the circumference, and the image side S10 is convex at the circumference.
第六透镜L6的物侧面S11于近轴处为凹面,像侧面S12于近轴处为凹面;物侧面S11于圆周处为凹面,像侧面S12于圆周处为凸面。The object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is concave at the circumference, and the image side S12 is convex at the circumference.
另外,第三实施例中光学系统10的各透镜参数由表5和表6给出,其中各结构和参数的定义可由第一实施例中得出,此处不加以赘述。In addition, the lens parameters of the optical system 10 in the third embodiment are given in Table 5 and Table 6, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
表5table 5
表6Table 6
该实施例中的摄像模组10满足以下关系:The camera module 10 in this embodiment satisfies the following relationship:
SD11/ImgHSD11/ImgH | 0.30.3 | (R8/R7)*|R8-R7|(R8/R7)*|R8-R7| | 53.71153.711 |
f3/ff3/f | 23.7523.75 | (f5/f6)*R11(f5/f6)*R11 | 15.2715.27 |
TTL/ImgHTTL/ImgH | 1.3271.327 | CT5/|SAG51|CT5/|SAG51| | 4.5754.575 |
ET56/CT56ET56/CT56 | 1.5111.511 | FFLFFL | 0.9780.978 |
f/EPDf/EPD | 1.881.88 | f2/R4f2/R4 | -1.69-1.69 |
由图6中的像差图可知,光学系统10的纵向球差、场曲和畸变均得到良好的控制,从而该实施例的光学系统10拥有良好的成像品质。It can be seen from the aberration diagram in FIG. 6 that the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, so that the optical system 10 of this embodiment has good imaging quality.
第四实施例Fourth Embodiment
参考图7和图8,在第四实施例中,光学系统10由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5及具有负屈折力的第六透镜L6。图7包括第四实施例中光学系统10的纵向球差图、像散图和畸变图,其中的像散图和畸变图的参考波长为587.56nm。7 and 8 , in the fourth embodiment, the optical system 10 sequentially includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side. The third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, and the sixth lens L6 with negative refractive power. FIG. 7 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the fourth embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
第一透镜L1的物侧面S1于近轴处为凸面,像侧面S2于近轴处为凹面;物侧面S1于圆周处为凸面,像侧面S2于圆周处为凹面。The object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
第二透镜L2的物侧面S3于近轴处为凸面,像侧面S4于近轴处为凹面;物侧面S3于圆周处为凸面,像侧面S4于圆周处为凹面。The object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
第三透镜L3的物侧面S5于近轴处为凸面,像侧面S6于近轴处为凹面;物侧面S5于圆周处为凹面,像侧面S6于圆周处为凸面。The object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is concave at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面;物侧面S7于圆周处为凹面,像侧面S8于圆周处为凸面。The object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
第五透镜L5的物侧面S9于近轴处为凸面,像侧面S10于近轴处为凸面;物侧面S9于圆周处为凸面,像侧面S10于圆周处为凸面。The object side S9 of the fifth lens L5 is convex at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is convex at the circumference, and the image side S10 is convex at the circumference.
第六透镜L6的物侧面S11于近轴处为凹面,像侧面S12于近轴处为凹面;物侧面S11于圆周处为凸面,像侧面S12于圆周处为凸面。The object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
另外,第四实施例中光学系统10的各透镜参数由表7和表8给出,其中各结构和参数的定义可由第一实施例中得出,此处不加以赘述。In addition, the lens parameters of the optical system 10 in the fourth embodiment are given in Table 7 and Table 8, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
表7Table 7
表8Table 8
该实施例中的摄像模组10满足以下关系:The camera module 10 in this embodiment satisfies the following relationship:
SD11/ImgHSD11/ImgH | 0.2880.288 | (R8/R7)*|R8-R7|(R8/R7)*|R8-R7| | 160.636160.636 |
f3/ff3/f | 42.9242.92 | (f5/f6)*R11(f5/f6)*R11 | 14.4614.46 |
TTL/ImgHTTL/ImgH | 1.3071.307 | CT5/|SAG51|CT5/|SAG51| | 4.0234.023 |
ET56/CT56ET56/CT56 | 1.581.58 | FFLFFL | 0.890.89 |
f/EPDf/EPD | 1.881.88 | f2/R4f2/R4 | -1.77-1.77 |
由图8中的像差图可知,光学系统10的纵向球差、场曲和畸变均得到良好的控制,从而该实施例的光学系统10拥有良好的成像品质。It can be seen from the aberration diagram in FIG. 8 that the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, so that the optical system 10 of this embodiment has good imaging quality.
第五实施例Fifth Embodiment
参考图9和图10,在第五实施例中,光学系统10由物侧至像侧依次包括孔径光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有正屈折力的第五透镜L5及具有负屈折力的第六透镜L6。图10包括第五实施例中光学系统10的纵向球差图、像散图和畸变图,其中的像散图和畸变图的参考波长为587.56nm。Referring to FIGS. 9 and 10 , in the fifth embodiment, the optical system 10 includes an aperture stop STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, and an aperture stop STO from the object side to the image side. The third lens L3 with positive refractive power, the fourth lens L4 with positive refractive power, the fifth lens L5 with positive refractive power, and the sixth lens L6 with negative refractive power. FIG. 10 includes a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system 10 in the fifth embodiment, wherein the reference wavelength of the astigmatism diagram and the distortion diagram is 587.56 nm.
第一透镜L1的物侧面S1于近轴处为凸面,像侧面S2于近轴处为凹面;物侧面S1于圆周处为凸面,像侧面S2于圆周处为凹面。The object side S1 of the first lens L1 is convex at the paraxial position, and the image side S2 is concave at the paraxial position; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.
第二透镜L2的物侧面S3于近轴处为凸面,像侧面S4于近轴处为凹面;物侧面S3于圆周处为凸面,像侧面S4于圆周处为凹面。The object side S3 of the second lens L2 is convex at the paraxial position, and the image side S4 is concave at the paraxial position; the object side S3 is convex at the circumference, and the image side S4 is concave at the circumference.
第三透镜L3的物侧面S5于近轴处为凸面,像侧面S6于近轴处为凸面;物侧面S5于圆周处为凹面,像侧面S6于圆周处为凸面。The object side S5 of the third lens L3 is convex at the paraxial position, and the image side S6 is convex at the paraxial position; the object side S5 is concave at the circumference, and the image side S6 is convex at the circumference.
第四透镜L4的物侧面S7于近轴处为凹面,像侧面S8于近轴处为凸面;物侧面S7于圆周处为凹面,像侧面S8于圆周处为凸面。The object side S7 of the fourth lens L4 is concave at the paraxial position, and the image side S8 is convex at the paraxial position; the object side S7 is concave at the circumference, and the image side S8 is convex at the circumference.
第五透镜L5的物侧面S9于近轴处为凹面,像侧面S10于近轴处为凸面;物侧面S9于圆周处为凹面,像侧面S10于圆周处为凸面。The object side S9 of the fifth lens L5 is concave at the paraxial position, and the image side S10 is convex at the paraxial position; the object side S9 is concave at the circumference, and the image side S10 is convex at the circumference.
第六透镜L6的物侧面S11于近轴处为凹面,像侧面S12于近轴处为凹面;物侧面S11于圆周处为凸面,像侧面S12于圆周处为凸面。The object side S11 of the sixth lens L6 is concave at the paraxial position, and the image side S12 is concave at the paraxial position; the object side S11 is convex at the circumference, and the image side S12 is convex at the circumference.
另外,第五实施例中光学系统10的各透镜参数由表9和表10给出,其中各结构和参数的定义可由第一实施例中得出,此处不加以赘述。In addition, the lens parameters of the optical system 10 in the fifth embodiment are given in Table 9 and Table 10, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.
表9Table 9
表10Table 10
该实施例中的摄像模组10满足以下关系:The camera module 10 in this embodiment satisfies the following relationship:
SD11/ImgHSD11/ImgH | 0.2730.273 | (R8/R7)*|R8-R7|(R8/R7)*|R8-R7| | 4.224.22 |
f3/ff3/f | 9.859.85 | (f5/f6)*R11(f5/f6)*R11 | 12.9812.98 |
TTL/ImgHTTL/ImgH | 1.2751.275 | CT5/|SAG51|CT5/|SAG51| | 3.0863.086 |
ET56/CT56ET56/CT56 | 0.6870.687 | FFLFFL | 1.151.15 |
f/EPDf/ |
22 | f2/R4f2/R4 | -1.573-1.573 |
由图10中的像差图可知,光学系统10的纵向球差、场曲和畸变均得到良好的控制,从而该实施例的光学系统10拥有良好的成像品质。It can be seen from the aberration diagram in FIG. 10 that the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, so that the optical system 10 of this embodiment has good imaging quality.
参考图11,本申请的一些实施例还提供了一种摄像模组20,摄像模组20可包括上述任意一个实施例的光学系统10及图像传感器210,图像传感器210设置于光学系统10的像侧。图像传感器210可以为CCD(Charge Coupled Device,电荷耦合器件)或CMOS(Complementary Metal Oxide Semiconductor,互补金属氧化物半导体)。一般地,在装配时,光学系统10的成像面S15与图像传感器210的感光表面重叠。Referring to FIG. 11 , some embodiments of the present application further provide a camera module 20 . The camera module 20 may include the optical system 10 and the image sensor 210 of any one of the above-mentioned embodiments, and the image sensor 210 is disposed on the image of the optical system 10 . side. The image sensor 210 may be a CCD (Charge Coupled Device, charge coupled device) or a CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor). Generally, when assembled, the imaging surface S15 of the optical system 10 overlaps the photosensitive surface of the image sensor 210 .
在一些实施例中,摄像模组20包括设于第六透镜L6与图像传感器210之间的红外截止滤光片110,红外截止滤光片110用于滤除红外光。在一些实施例中,红外截止滤光片110可安装至镜头的像端。在一些实施例中,摄像模组20还包括保护玻璃,保护玻璃设于红外截止滤光片与图像传感器210之间,保护玻璃用于保护图像传感器210。In some embodiments, the camera module 20 includes an infrared cut filter 110 disposed between the sixth lens L6 and the image sensor 210 , and the infrared cut filter 110 is used to filter out infrared light. In some embodiments, the infrared cut filter 110 may be mounted to the image end of the lens. In some embodiments, the camera module 20 further includes a protective glass, the protective glass is disposed between the infrared cut filter and the image sensor 210 , and the protective glass is used to protect the image sensor 210 .
通过采用上述光学系统10,摄像模组20能够实现小头部设计,以此在作为设备的前置摄像模组时,可缩小在设备屏幕上的开孔尺寸,进而提高设备的屏占比,另外也有利于提高系统的成像质量。By using the above optical system 10, the camera module 20 can realize a small head design, so that when used as the front camera module of the device, the size of the opening on the screen of the device can be reduced, thereby increasing the screen ratio of the device. In addition, it is also beneficial to improve the imaging quality of the system.
参考图12,本申请的一些实施例还提供了一种电子设备30。电子设备30包括固定件310,摄像模组20安装于固定件310,固定件310可以为显示屏、触控显示屏、电路板、中框、后盖等部件。电子设备30可以为但不限于智能手机、智能手表、智能眼镜、电子书阅读器、车载摄像设备、监控设备、无人机、医疗设备(如内窥镜)、平板电脑、生物识别设备(如指纹识别设备或瞳孔识别设备等)、PDA(Personal Digital Assistant,个人数字助理)、无人机等。Referring to FIG. 12 , some embodiments of the present application further provide an electronic device 30 . The electronic device 30 includes a fixing member 310 , and the camera module 20 is mounted on the fixing member 310 . The fixing member 310 may be a display screen, a touch display screen, a circuit board, a middle frame, a back cover, and other components. The electronic device 30 can be, but is not limited to, a smartphone, a smart watch, a smart glasses, an e-book reader, an in-vehicle camera device, a monitoring device, a drone, a medical device (such as an endoscope), a tablet computer, a biometric device (such as a Fingerprint recognition equipment or pupil recognition equipment, etc.), PDA (Personal Digital Assistant, personal digital assistant), drones, etc.
特别地,在一些实施例中,电子设备30包括触控显示屏,摄像模组20设于触控显示屏背离显示面的一侧,且摄像模组20的头部朝向触控显示屏以作为前置显示模组,另外也能够使电子设备30具有屏下摄像的功能。通过采用上述具有小头部特性的摄像模组还可减小屏幕上的开孔尺寸,从而可提高设备的屏占比,进而有利于设备实现全面屏设计。In particular, in some embodiments, the electronic device 30 includes a touch display screen, the camera module 20 is disposed on a side of the touch display screen away from the display surface, and the head of the camera module 20 faces the touch display screen to serve as a The front display module can also enable the electronic device 30 to have the function of under-screen camera. By using the above-mentioned camera module with a small head feature, the size of the opening on the screen can also be reduced, so that the screen ratio of the device can be increased, which is conducive to the realization of a full-screen design of the device.
本发明实施例中所使用到的“电子设备”可包括,但不限于被设置成经由有线线路连接(如经由公共交换电话网络(public switched telephone network,PSTN)、数字用户线路(digital subscriber line,DSL)、数字电缆、直接电缆连接,以及/或另一数据连接/网络)和/或经由(例如,针对蜂窝网络、无线局域网(wireless local area network,WLAN)、诸如手持数字视频广播(digital video broadcasting handheld,DVB-H)网络的数字电视网络、卫星网络、调幅-调频(amplitude modulation-frequency modulation,AM-FM)广播发送器,以及/或另一通信终端的)无线接口接收/发送通信信号的装置。被设置成通过无线接口通信的电子设备可以被称为“无线通信终端”、“无线终端”以及/或“移动终端”。移动终端的示例包括,但不限于卫星或蜂窝电话;可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(personal communication system,PCS)终端;可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(global positioning system,GPS)接收器的个人数字助理(personal digital assistant,PDA);以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子设备。The "electronic equipment" used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via wired lines (eg, via a public switched telephone network (PSTN), a digital subscriber line, DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), such as digital video broadcasting handheld, DVB-H) network digital television network, satellite network, AM-FM (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal) wireless interface to receive/send communication signals installation. Electronic devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistants (PDAs) with intranet access, web browsers, memo pads, calendars, and/or global positioning system (GPS) receivers; and conventional laptops and/or palmtops A receiver or other electronic device including a radiotelephone transceiver.
在本发明的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、 “上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中,“多个”的含义是至少两个,例如两个,三个等,除非另有明确具体的限定。In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系,除非另有明确的限定。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
在本发明中,除非另有明确的规定和限定,第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触,或第一和第二特征通过中间媒介间接接触。而且,第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方,或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
Claims (22)
- 一种光学系统,由物侧至像侧依次包括:An optical system, comprising in order from the object side to the image side:具有正屈折力的第一透镜;a first lens having a positive refractive power;具有负屈折力的第二透镜;a second lens having a negative refractive power;具有正屈折力的第三透镜;a third lens having a positive refractive power;具有屈折力的第四透镜,所述第四透镜的物侧面于近轴处为凹面,像侧面于近轴处为凸面;The fourth lens with refractive power, the object side of the fourth lens is concave at the paraxial position, and the image side is convex at the paraxial position;具有正屈折力的第五透镜,所述第五透镜的物侧面与像侧面均为非球面;a fifth lens with positive refractive power, the object side and the image side of the fifth lens are both aspherical;具有负屈折力的第六透镜,所述第六透镜的物侧面和像侧面均为非球面,且该物侧面和像侧面中至少一个面设有反曲点;The sixth lens with negative refractive power, the object side and the image side of the sixth lens are both aspherical, and at least one of the object side and the image side is provided with an inflection point;所述光学系统满足关系:The optical system satisfies the relation:0.25<SD11/ImgH<0.35;0.25<SD11/ImgH<0.35;SD11为所述第一透镜的物侧面的最大有效半径,ImgH为所述光学系统的最大视场角所对应的像高的一半。SD11 is the maximum effective radius of the object side surface of the first lens, and ImgH is half of the image height corresponding to the maximum angle of view of the optical system.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:5<f3/f<45;5<f3/f<45;f3为所述第三透镜的有效焦距,f为所述光学系统的有效焦距。f3 is the effective focal length of the third lens, and f is the effective focal length of the optical system.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:1.25<TTL/ImgH<1.35;1.25<TTL/ImgH<1.35;TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。TTL is the distance on the optical axis from the object side of the first lens to the imaging plane of the optical system.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:0.65<ET56/CT56<1.65;0.65<ET56/CT56<1.65;ET56为所述第五透镜的像侧面最大有效径处至所述第六透镜的物侧面最大有效径处于光轴方向的距离,CT56为所述第五透镜的像侧面至所述第六透镜的物侧面于光轴上的距离。ET56 is the distance from the maximum effective diameter of the image side of the fifth lens to the maximum effective diameter of the object side of the sixth lens in the direction of the optical axis, and CT56 is the distance from the image side of the fifth lens to the sixth lens. The distance of the object side from the optical axis.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:f/EPD≤2.1;f/EPD≤2.1;f为所述光学系统的有效焦距,EPD为所述光学系统的入瞳直径。f is the effective focal length of the optical system, and EPD is the entrance pupil diameter of the optical system.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:-2.0<f2/R4<-1.0;-2.0<f2/R4<-1.0;f2为所述第二透镜的有效焦距,R4为所述第二透镜的像侧面于光轴处的曲率半径。f2 is the effective focal length of the second lens, and R4 is the radius of curvature of the image side of the second lens at the optical axis.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:1.0mm<(R8/R7)*|R8-R7|<180.0mm;1.0mm<(R8/R7)*|R8-R7|<180.0mm;R7为所述第四透镜的物侧面于光轴处的曲率半径,R8为所述第四透镜的像侧面于光轴处的曲率半径。R7 is the radius of curvature of the object side of the fourth lens at the optical axis, and R8 is the radius of curvature of the image side of the fourth lens at the optical axis.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:5.0mm<(f5/f6)*R11<20.0mm;5.0mm<(f5/f6)*R11<20.0mm;f5为所述第五透镜的有效焦距,f6为所述第六透镜的有效焦距,R11为所述第六透镜的物侧面于光轴处的曲率半径。f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and R11 is the radius of curvature of the object side of the sixth lens at the optical axis.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:2.5<CT5/|SAG51|<5.5;2.5<CT5/|SAG51|<5.5;CT5为所述第五透镜于光轴上的厚度,SAG51为所述第五透镜的物侧面于最大有效半径处的矢高。CT5 is the thickness of the fifth lens on the optical axis, and SAG51 is the sag of the object side of the fifth lens at the maximum effective radius.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:0.85mm<FFL<1.30mm;0.85mm<FFL<1.30mm;FFL为所述第六透镜的像侧面至所述光学系统的成像面于光轴方向的最小距离。FFL is the minimum distance from the image side of the sixth lens to the image plane of the optical system in the direction of the optical axis.
- 根据权利要求1所述的光学系统,其特征在于,满足关系:The optical system according to claim 1, wherein the relationship is satisfied:ImgH≥4.8mm。ImgH≥4.8mm.
- 根据权利要求1所述的光学系统,其特征在于,所述第一透镜的物侧面于近轴处为凸面,像侧面于近轴处为凹面。The optical system according to claim 1, wherein the object side of the first lens is convex at the paraxial position, and the image side surface is concave at the paraxial position.
- 根据权利要求1所述的光学系统,其特征在于,所述第六透镜的物侧面和像侧面于近轴处均为凹面。The optical system according to claim 1, wherein the object side and the image side of the sixth lens are both concave at the paraxial position.
- 根据权利要求1所述的光学系统,其特征在于,所述第五透镜的物侧面和像侧面均不存在反曲点。The optical system according to claim 1, wherein there is no inflection point on the object side and the image side of the fifth lens.
- 根据权利要求1所述的光学系统,其特征在于,所述光学系统包括孔径光阑,所述孔径光阑设于所述第一透镜的物侧。The optical system according to claim 1, wherein the optical system comprises an aperture stop, and the aperture stop is provided on the object side of the first lens.
- 根据权利要求1至15任意一项所述的光学系统,其特征在于,所述第一透镜至所述第六透镜中,至少一者的材质为塑料。The optical system according to any one of claims 1 to 15, wherein at least one of the first lens to the sixth lens is made of plastic.
- 根据权利要求16所述的光学系统,其特征在于,所述第一透镜至所述第六透镜中,各透镜的材质均为塑料。The optical system according to claim 16, wherein the material of each lens in the first lens to the sixth lens is plastic.
- 根据权利要求1至15任意一项所述的光学系统,其特征在于,所述第一透镜至所述第六透镜中,至少一者的物侧面及/或像侧面为非球面。The optical system according to any one of claims 1 to 15, wherein the object side and/or the image side of at least one of the first to sixth lenses are aspherical.
- 根据权利要求18所述的光学系统,其特征在于,所述第一透镜至所述第六透镜中,各透镜的物侧面和像侧面均为非球面。19. The optical system according to claim 18, wherein in the first lens to the sixth lens, the object side surface and the image side surface of each lens are aspherical.
- 根据权利要求1所述的光学系统,其特征在于,所述光学系统包括红外截止滤光片,所述红外截止滤光片设于所述第六透镜的像侧。The optical system according to claim 1, wherein the optical system comprises an infrared cut filter, and the infrared cut filter is provided on the image side of the sixth lens.
- 一种摄像模组,包括图像传感器及权利要求1至20任意一项所述的光学系统,所述图像传感器设于所述光学系统的像侧。A camera module, comprising an image sensor and the optical system according to any one of claims 1 to 20, wherein the image sensor is arranged on the image side of the optical system.
- 一种电子设备,包括固定件及权利要求21所述的摄像模组,所述摄像模组设于所述固定件。An electronic device, comprising a fixing member and the camera module according to claim 21, wherein the camera module is arranged on the fixing member.
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