WO2019205789A1 - Système de lentilles, lentille, module de caméra et dispositif électronique - Google Patents

Système de lentilles, lentille, module de caméra et dispositif électronique Download PDF

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Publication number
WO2019205789A1
WO2019205789A1 PCT/CN2019/075756 CN2019075756W WO2019205789A1 WO 2019205789 A1 WO2019205789 A1 WO 2019205789A1 CN 2019075756 W CN2019075756 W CN 2019075756W WO 2019205789 A1 WO2019205789 A1 WO 2019205789A1
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Prior art keywords
lens
liquid
group
lens group
optical axis
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PCT/CN2019/075756
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English (en)
Chinese (zh)
Inventor
江依达
陈锴
秦振凯
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华为技术有限公司
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Publication of WO2019205789A1 publication Critical patent/WO2019205789A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • the present application relates to the field of electronic device technologies, and in particular, to a lens system, a lens, a camera module, and an electronic device.
  • the camera function is more common, and the size of the sensor chip is reduced, the resolution and image quality are improved, and the settings are set in the smart electronic products.
  • the lens system is closer to the compact imaging lens system with smaller lens spacing, but for the compact imaging lens system, in order to ensure clear imaging, the focal length is variable, and thus the focus is achieved.
  • the realization of the focal length variation in the lens system is mainly achieved by adjusting the distance between each lens in the lens system to the photosensitive chip through a voice coli motor (VCM).
  • VCM voice coli motor
  • VCM is a device that converts electrical energy into mechanical energy.
  • the magnetic field generated by the permanent magnet and the magnetic field generated by the coiled conductor are used to move the magnetic pole, so that the magnetic pole drives the lens to move linearly and finitely.
  • VCM will drive the lens in the lens system to move up and down as a whole, which makes the lens easy to tilt, which is not conducive to imaging, and eventually the imaging quality of the lens system is deteriorated.
  • the present application provides a lens system, a lens, a camera module, and an electronic device to solve the problem of poor image quality caused by VCM in the prior art.
  • an embodiment of the present application provides a lens system including a telephoto lens group and a liquid lens; wherein the telephoto lens group may sequentially include the first from the object side to the image side along the optical axis. a fixed lens group and a second fixed lens group; the liquid lens may be located on either side of the telephoto lens group or between the first fixed lens group and the second fixed lens group in the optical axis direction. Since the liquid lens is disposed in the lens system, by changing the voltage on both sides of the liquid lens, the focal length can be made variable, and it is no longer necessary to move the lens in the telephoto lens group, so that the sharpness of imaging can be effectively ensured.
  • the lens system may further include a prism group, and the prism group may be located on a side of the telephoto lens group facing the object side in the optical axis direction. In this way, by increasing the prism group, the mode of propagation of light in the lens system can be changed, so that the application range of the lens system is wider.
  • the prism group may be located in the telephoto lens group and in the optical axis direction. Between liquid lenses. Since the prism group is located between the telephoto lens group and the liquid lens in the optical axis direction, the prism group can be used as a substrate of a liquid lens, and no additional substrate for supporting the liquid lens is required. Therefore, the volume of the lens system can be well controlled.
  • the refractive power of the liquid lens may be a positive number, and the curvature of the liquid lens may range from 0 to 0.1.
  • the liquid lens can be a convex lens, which can converge the light, and the curvature of the liquid lens can be changed within a set range to change the focal length of the lens system, thereby achieving focusing.
  • the refractive power of the liquid lens may also be a negative number, and the curvature of the liquid lens may range from -0.1 to 0.
  • the liquid lens can also be a concave lens, which can diverge the light.
  • the curvature of the liquid lens can be changed within a set range to change the focal length of the lens system, thereby achieving focusing.
  • the first fixed lens group may include a first lens and a second lens in order from the object side to the image side along the optical axis; the second fixed lens group is from the object side to the image side along the optical axis
  • the third lens, the fourth lens, and the fifth lens may be sequentially included; wherein, the refractive power of the first lens and the fourth lens may be a positive number, and the refractive power of the second lens, the third lens, and the fifth lens Can be a negative number.
  • the telephoto lens group can include a plurality of lenses, and a plurality of lens combinations can achieve better effects of correcting aberrations and chromatic aberrations.
  • a surface of the first lens facing the object side may be a convex surface
  • a surface of the third lens, the fourth lens, and the fifth lens facing the object side may be a concave surface
  • the second lens is oriented toward the image.
  • the surface of the side may be concave.
  • the telephoto lens group may satisfy part or all of the following conditions, where V1 is an Abbe number of the first lens, and V2 is an Abbe number of the second lens, V3 is the Abbe number of the third lens, V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens:
  • the Abbe number difference of the lens can be ensured to be in a specific range, so that the dispersion degree of each lens is better matched, thereby better calibrating the aberration and the chromatic aberration caused by the light, and further ensuring the image clarity.
  • the Abbe number of the first lens and the third lens may be the same, and the Abbe numbers of the second lens, the fourth lens, and the fifth lens may also be the same.
  • an embodiment of the present application provides a lens including an aperture and the lens system described in the first aspect and any one of the embodiments.
  • an embodiment of the present application provides a camera module, where the camera module includes a photosensitive chip and the lens provided in the second aspect.
  • an embodiment of the present application provides an electronic device, where the electronic device includes a processor and an imaging device, where the imaging device includes the lens system described in the first aspect and any one of the embodiments;
  • the processor is configured to control a voltage applied to the liquid lens in the lens system to change a curvature of the liquid lens.
  • FIG. 1 is a schematic structural view of a first lens system provided by the present application.
  • FIG. 2 is a schematic structural view of a second lens system provided by the present application.
  • FIG. 3 is a schematic structural view of a third lens system provided by the present application.
  • 4A is a schematic structural view of a fourth lens system provided by the present application.
  • FIG. 4B is a schematic structural view of a fifth lens system provided by the present application.
  • FIG. 4C is a schematic structural view of a sixth lens system provided by the present application.
  • FIG. 5 is a schematic structural view of a telephoto lens group provided by the present application.
  • FIG. 6 is a schematic structural view of a seventh lens system provided by the present application.
  • FIG. 7 is a schematic structural view of an eighth lens system provided by the present application.
  • FIG. 8 is a schematic structural view of a ninth lens system provided by the present application.
  • FIG. 9 is a schematic structural diagram of a lens provided by the present application.
  • FIG. 10 is a schematic structural diagram of a camera module provided by the present application.
  • FIG. 11 is a schematic structural diagram of an electronic device provided by the present application.
  • the liquid lens is composed of a film-wrapping liquid. By changing the voltage on both sides of the liquid lens, the curvature of the liquid lens can be generated, thereby changing the focal length.
  • refractive power used to characterize the convergence or divergence of the lens to the light
  • refractive power can be expressed by the reciprocal of the focal length, when the refractive power is positive, it means that the lens has a convergence effect on the light, which is a convex lens; when the refractive power is When it is negative, it means that it has a diverging effect on the light and is a concave lens.
  • the Abbe number of the lens is the dispersion coefficient of the lens, and refers to the difference ratio of the refractive indices of the lenses at different wavelengths, which is used to characterize the degree of dispersion of the lens.
  • the refractive index is used to indicate the degree of refraction of the lens to light, which is determined by the angle of incidence and the angle of refraction when the light passes through the lens.
  • multiple means two or more.
  • the embodiment of the present application provides a lens system that can be applied to a lens system including a telephoto lens group, which changes the focal length of the telephoto lens group to achieve focusing.
  • the lens system can be applied to an optical system having an imaging function, such as a telescope, a periscope, and can also be applied to an electronic device having a camera function, such as a camera, a camera, a mobile phone, a tablet computer, etc., in the embodiment of the present application.
  • the lens system application scenario is not limited, and the above description is merely an example.
  • the lens system may include a telephoto lens group and a liquid lens; the telephoto lens group may include two lens groups, and the two lens groups cooperate to form an image, and the telephoto lens group is along the optical axis from the object side.
  • the first fixed lens group and the second fixed lens group are sequentially included to the image side.
  • the liquid lens is placed in a lens system including a telephoto lens group, and the liquid lens can be placed in various positions, for example, the liquid lens is located on either side of the telephoto lens group along the optical axis direction, For example, the liquid lens is located between the first fixed lens group and the second fixed lens group in the optical axis direction.
  • the liquid lens has three possible positions, the position one, the liquid lens is located on the side of the telephoto lens group facing the object side along the optical axis direction; and the second position, the liquid lens is along the optical axis direction
  • the liquid crystal lens is located between the first fixed lens group and the second fixed lens group in the optical axis direction.
  • the liquid lens is located on a side of the telephoto lens group facing the object side in the optical axis direction.
  • the lens system 100 includes a telephoto lens group 101 and a liquid lens 102;
  • the telephoto lens group 101 includes a first fixed lens group 103 and a second fixed lens group 104 in order from the object side to the image side along the optical axis;
  • the liquid lens 102 is located on the side of the telephoto lens group 101 facing the object side in the optical axis direction.
  • the voltage change outside the liquid lens realizes the curvature change, and the voltage on the outer side may be symmetrically the same or different in symmetry; when the outer voltages are symmetric, the uniform curvature of the liquid lens may be changed; when the voltage symmetry of the outer side is different, The curvature of the liquid lens does not change uniformly, and the direction of the light can be changed, so that the focus moves at a certain angle.
  • the position of the focus can be changed by applying different voltages to the outside of the liquid lens, and the The problem of imaging deterioration caused by jitter.
  • a filter, glass substrate or other component may be added to the lens system as a substrate for the liquid lens.
  • the liquid lens is located between the first fixed lens group and the second fixed lens group in the optical axis direction.
  • a lens system provided by an embodiment of the present application includes a telephoto lens group 201 and a liquid lens 202 .
  • the telephoto lens group includes a first fixed lens group 203 and a second fixed lens group 204 in order from the object side to the image side along the optical axis of 201.
  • the liquid lens 202 is located between the first fixed lens group 203 and the second fixed lens group 204 in the optical axis direction.
  • the liquid lens is placed inside the telephoto lens group, and the focal length can be variable by using the liquid lens, and the gap between the two fixed lens groups in the telephoto lens group can be effectively utilized, further It can effectively control the area occupied by the lens system.
  • the liquid lens In position three, the liquid lens is located on a side of the telephoto lens group facing the image side in the optical axis direction.
  • a lens system provided by an embodiment of the present application includes a telephoto lens group 301 and a liquid lens 302 .
  • the telephoto lens group includes a first fixed lens group 303 and a second fixed lens group 304 in order from the object side to the image side along the 301 optical axis.
  • the liquid lens 302 is located on the side of the telephoto lens group 301 facing the image side in the optical axis direction.
  • the focal length can be changed by simply changing the voltage outside the liquid lens, and it is not necessary to move the lens in the telephoto lens group to ensure image clarity.
  • a filter, a glass substrate or other components may be added to the side of the liquid lens in the direction of the image axis toward the image side as the substrate of the liquid lens.
  • the focal length of the lens system is variable by the curvature change of the liquid lens.
  • the lens of the telephoto lens group does not need to be moved, that is, When the lens system is designed, there is no need to reserve a space for lens movement, which can effectively reduce the occupied area of the lens system.
  • the lens system may further include a prism group located on a side of the telephoto lens group facing the object side along the optical axis direction.
  • Providing a prism group in the lens system can change the direction of propagation of the light, so that the lens system can be applied in a wider range of applications, for example, in the field of periscope, reconnaissance, and the like.
  • the prism group is located on a side of the telephoto lens group facing the object side along the optical axis direction, and can cause a certain angle of turning of the light when the light enters the lens system.
  • the lens system when the lens system further includes a prism group, there are the following three cases.
  • the prism group may include a plurality of prisms to achieve multiple turning of the light.
  • the prism group includes a prism as an example for description.
  • the case where the prism group can include a plurality of prisms is similar, and details are not described herein again.
  • the lens system 400 includes a telephoto lens group 401, a liquid lens 402, and a prism group 403.
  • the telephoto lens group 401 includes a first fixed lens group 404 and a second fixed lens group 405 in order from the object side to the image side along the optical axis.
  • the liquid lens 402 is located on a side of the telephoto lens group 401 facing the object side in the optical axis direction; the prism group 403 is located between the telephoto lens group 401 and the liquid lens 402 in the optical axis direction.
  • the liquid lens is arranged to achieve a variable focal length of the lens system
  • the prism group is capable of changing the direction of propagation of the light
  • the liquid lens is located at one side of the prism group, and the liquid lens can be
  • One side of the prism group is a substrate, and no additional components are required as a base of the liquid lens, so that the footprint of the lens system becomes small.
  • the lens system 400 includes a telephoto lens group 401, a liquid lens 402, and a prism group 403.
  • the telephoto lens group 401 includes a first fixed lens group 404 and a second fixed lens group 405 in order from the object side to the image side along the optical axis.
  • the liquid lens 402 is located between the first fixed lens group 404 and the second fixed lens group 405 in the optical axis direction.
  • the prism group 402 is located on the side of the telephoto lens group 401 facing the object side in the optical axis direction.
  • the liquid lens is disposed in the telephoto lens group, and the focal length of the lens system can be changed, and the gap in the telephoto lens group can be effectively utilized, thereby making the occupied area of the lens system small.
  • the lens system 400 includes a telephoto lens group 401, a liquid lens 402, and a prism group 403.
  • the telephoto lens group 401 includes a first fixed lens group 404 and a second fixed lens group 405 in order from the object side to the image side along the optical axis.
  • the liquid lens 402 is located on a side of the telephoto lens group 401 facing the image side in the optical axis direction; the prism group 402 is located on a side of the telephoto lens group 401 facing the object side in the optical axis direction.
  • a plurality of lenses may be included in the telephoto lens group included in the lens system provided by the embodiment of the present application.
  • a telephoto lens group is provided in the embodiment of the present application, and the telephoto lens group includes a first fixed lens group 501 and a second from the object side to the image side along the 401 optical axis.
  • the lens group 502 is fixed.
  • the first fixed lens group 501 includes a first lens 503 and a second lens 504 in order from the object side to the image side along the optical axis.
  • the second fixed lens 502 group includes a third lens 505, a fourth lens 506, and a fifth lens 507 in order from the object side to the image side along the optical axis.
  • the refractive power of the first lens 503 and the fourth lens 506 is a positive number, and the refractive powers of the second lens 504, the third lens 505, and the fifth lens 507 are negative.
  • the first lens and the fourth lens are convex lenses
  • the second lens, the third lens, and the fifth lens are concave lenses.
  • the convex lens and the concave lens have various shapes, for example, the convex lens has a lenticular lens, a plano-convex lens, and a meniscus lens, and the concave lens has a biconcave lens, a plano-concave lens, and a meniscus lens.
  • the specific shapes of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are not limited herein, and any lens capable of satisfying the refractive power requirement of each lens and capable of forming a telephoto lens system is applicable to the present invention. Apply for an embodiment.
  • a surface of the first lens facing the object side is a convex surface
  • a surface of the third lens, the fourth lens, and the fifth lens facing the object side is a concave surface
  • a surface of the second lens facing the image side is a concave surface
  • the first lens may be a lenticular lens, a plano-convex lens, or a convex-concave lens, and only the surface facing the object side may be a convex surface;
  • the second lens may be a biconcave lens or a plano-concave lens.
  • the fourth lens may be a concave-convex lens whose central portion is thicker than the edge portion, and the surface facing the object side is concave, facing the image
  • the surface of the side surface is a convex surface
  • the third lens and the fifth lens may be a biconcave lens, or a plano-concave lens, or a convex-concave lens whose central portion is thinner than the edge portion, and only the surface facing the object side is a concave surface.
  • an Abbe number V1 of the first lens, an Abbe number V2 of the second lens, an Abbe number V3 of the third lens, and an Abbe number V4 of the fourth lens can satisfy some or all of the following conditions:
  • Condition one 30 ⁇ V1-V2 ⁇ 35; condition two, 30 ⁇ V1-V4 ⁇ 35; condition three, 30 ⁇ V1-V5 ⁇ 35; condition four, 30 ⁇ V3-V4 ⁇ 35; condition five, 30 ⁇ V3 -V5 ⁇ 35; condition six, 30 ⁇ V3-V2 ⁇ 35.
  • Condition 1 to Condition 6 can be satisfied, and the Abbe number difference between the two lenses is in a specific range, so that the dispersion degree of the two lenses can be better matched, thereby enabling Good calibration aberrations and chromatic aberrations of light further ensure clear imaging.
  • the Abbe numbers of the respective lenses included in the telephoto lens group may be the same, different, or partially the same.
  • the liquid lens has a wide range of curvature variation, which enables the lens system to have a larger range of adjustable focal lengths, widening the applicable range of the lens system.
  • the refractive power of the liquid lens is a positive number, and the curvature of the liquid lens ranges from 0 to 0.1, that is, the liquid lens is a convex lens, where the shape of the liquid lens is not limited, and any refractive index is used.
  • the liquid lens having a positive force is applicable to the embodiment of the present application.
  • the liquid lens has a large variation range of curvature, which can make the lens system have a larger adjustable focal length range and widen the applicable range of the lens system.
  • the convex lens has a converging effect on the light, so that the light passing through the liquid lens having a positive refractive power can be transmitted to the subsequent components more, thereby improving the imaging quality of the lens system.
  • the refractive power of the liquid lens is a negative number, and the curvature of the liquid lens ranges from -0.1 to 0, that is, the liquid lens is a concave lens, and the shape of the liquid lens is not made here. It is defined that any liquid lens having a negative refractive power is suitable for the embodiment of the present application.
  • the concave lens has a diverging effect on the light, so that the range of light projection by the liquid lens having a negative refractive power becomes large, and the chromatic aberration caused by the dispersion of the light can also be reduced.
  • f1 and F satisfy the following conditions:
  • the radius of curvature of the vertex of the first lens object side is R1
  • the radius of curvature of the vertex of the image side is R2
  • R1 and R2 satisfy the following conditions:
  • f2 and F satisfy the following conditions:
  • the radius of curvature of the vertex of the second lens object side is R3, and the radius of curvature of the vertex of the image side is R4, and R3 and R4 satisfy the following conditions:
  • f3 and F satisfy the following conditions:
  • the radius of curvature of the apex of the third lens object side is R5, and the radius of curvature of the apex of the image side is R6, and R5 and R6 satisfy the following conditions:
  • f4 and F satisfy the following conditions:
  • the radius of curvature of the vertex of the fourth lens object side is R7
  • the radius of curvature of the vertex of the image side is R8, and R7 and R8 satisfy the following conditions:
  • f5 and F satisfy the following conditions:
  • the radius of curvature of the apex of the fifth lens object side is R9
  • the radius of curvature of the vertex of the image side is R10
  • R9 and R10 satisfy the following conditions:
  • the radius of curvature of the vertex refers to the radius of curvature at the highest point on one side of the lens
  • the radius of curvature of the vertex of the object side is the radius of curvature at the highest point on one side of the lens facing the object side
  • the radius of curvature of the vertex of the image side is The radius of curvature of the lens at the highest point on one side of the image side; if the surface is convex, the apex of the surface has a positive radius; if the surface is a plane, the radius of curvature of the surface of the surface is infinite, if the surface is concave, Then, the apex of the face has a negative radius; the focal length of the lens system and the focal length of each lens are both positive and negative.
  • the Abbe number V1 of the first lens and the third lens may be 55.987; and the Abbe number V2 of the second lens, the fourth lens, and the fifth lens may be 21.514.
  • the present application provides a lens that can include the lens system provided by any of the above embodiments.
  • the lens system 600 includes a telephoto lens group 601, a liquid lens 602, and a prism group 603; the liquid lens 602 is located in the optical axis direction on the object side of the telephoto lens group 601.
  • the prism group 603 is located between the telephoto lens group 601 and the liquid lens 602 in the optical axis direction;
  • the telephoto lens group 601 includes the first in order from the object side to the image side along the optical axis a fixed lens group 604 and a second fixed lens group 605;
  • the first fixed lens group 604 includes a first lens 606 and a second lens 607 in order from the object side to the image side along the optical axis;
  • the optical axis includes a third lens 608, a fourth lens 609, and a fifth lens 610 in order from the object side to the image side.
  • the lens system 600 further includes an aperture stop 611 and an IR filter 612; the aperture stop 611 is located between the first lens 606 and the second lens 607 in the optical axis direction, and the IR filter 612 is located along the optical axis direction.
  • the fifth lens 610 faces the side of the image side.
  • the F value represents the value of the focal length and the aperture size of the aperture, and the F value can be used to characterize the amount of light passing through the lens system; with the lens system as the apex, the object image of the target to be measured can be formed by the two edges of the maximum range of the lens system.
  • the angle of view is the field of view (FOV), the field of view is used to characterize the field of view of the lens system, the half FOV is half of the field of view; the total track length (TTL) refers to the lens system
  • the first component forms the length of the lens to the image plane; the lens system is suitable for use in the visible wavelength range of approximately 620 nm to 450 nm.
  • the surface of each component of the lens system is sequentially numbered from the object side to the image side from the object surface of the lens system, in order to achieve better
  • the imaging effect adds an aperture stop and a filter for controlling the amount of light passing through the lens system.
  • the filter selected in this embodiment is an IR filter (infrared color filter), an IR filter. It refers to a device that can filter out the infrared rays in the light.
  • the aperture stop corresponds to one surface, and each lens and the IR filter correspond to two curved surfaces respectively; wherein the object surface, the aperture stop and the surface corresponding to the IR filter
  • the shape is FLAT (plane), the radius is INF (infinity, infinity); the shape of the surface corresponding to each lens is ASP (aspher, aspherical), and the radius of the surface is the radius of curvature of the vertex.
  • each lens corresponds to two values, the first value represents the thickness of the lens, and the second value represents the center point of the surface of the lens toward the image side to the center of the surface of the next component toward the object side.
  • the distance between the center points is 0.5 mm.
  • the aperture stop only corresponds to one curved surface, and the value in the thickness or interval indicates the distance between the center point of the curved surface 7 corresponding to the aperture grating and the center point of the curved surface 8 of the second lens, and the distance is a negative value indicating that the curved surface 8 of the second lens is convex. To the aperture of the aperture stop.
  • the liquid lens is formed by a film encapsulating the liquid, the outer side is a film, the inside is a liquid; the prism in the lens system can be made of glass, and the other lenses can be made of plastic.
  • the liquid lens since the liquid lens has an outer film and an inner liquid, the refractive index and the Abbe number of the outer film and the inner liquid are respectively recorded, wherein 1.41 and 49.9 are the refractive indices of the outer film of the liquid lens, respectively. And Abbe number, 1.29 and 108.5 are the refractive index and Abbe number of the liquid in the liquid lens, respectively.
  • the aspherical coefficients of the five lenses included in the telephoto lens group are as shown in Table 1C, where S represents the label of each lens surface, R represents the radius of curvature, K represents the conic coefficient, and A represents the fourth-order aspheric coefficient.
  • B represents a 6th-order aspherical coefficient, C represents an 8th-order aspherical coefficient, and D represents a 10th-order aspherical coefficient.
  • the lens system 700 includes a telephoto lens group 701 and a liquid lens 702; the telephoto lens group 701 includes a first fixed lens group 703 in order from the object side to the image side along the optical axis. And a second fixed lens group 704; the first fixed lens group 703 includes a first lens 705 and a second lens 706 in order from the object side to the image side along the optical axis; the second fixed lens 704 group is along the optical axis
  • the side to image side includes a third lens 707, a fourth lens 708, and a fifth lens 709 in order.
  • the liquid lens 702 is located between the first fixed lens group 703 and the second fixed lens group 704 in the optical axis direction.
  • an aperture stop 710 and an IR filter 711 there is further included an aperture stop 710 and an IR filter 711; the aperture stop 710 is located between the first lens 705 and the second lens 706 in the optical axis direction, and the IR filter 711 is located in the fifth lens 709 along the optical axis direction. Towards the side of the image side.
  • a glass substrate is added to the side of the liquid lens toward the image side.
  • the surface of the glass substrate is numbered 8 and 9.
  • the lens system 800 includes a telephoto lens group 801 and a liquid lens 802; the liquid lens 802 is located on a side of the telephoto lens group 801 facing the image side along the optical axis direction;
  • the telephoto lens group 801 includes a first fixed lens group 803 and a second fixed lens group 804 in order from the object side to the image side along the optical axis;
  • the first fixed lens group 803 is sequentially from the object side to the image side along the optical axis
  • the first lens 805 and the second lens 806 are included;
  • the second fixed lens 804 includes a third lens 807, a fourth lens 808, and a fifth lens 809 in order from the object side to the image side along the optical axis.
  • an aperture stop 810 and an IR filter 811 there is further included an aperture stop 810 and an IR filter 811; the aperture stop 810 is located between the first lens 805 and the second lens 806 in the optical axis direction, and the IR filter 811 is located at the liquid lens 802 in the optical axis direction. Like the side of the side.
  • the liquid lens can use the IR filter as a substrate, and the meanings of the various parameters in Table 3B are referred to the related description of Table 1B, and details are not described herein again.
  • the aspherical coefficients of the five lenses included in the telephoto lens group are as shown in Table 2C, where S represents the label of each lens surface, R represents the radius of curvature, K represents the conic coefficient, and A represents the fourth-order aspheric coefficient.
  • B represents a 6th-order aspherical coefficient, C represents an 8th-order aspherical coefficient, and D represents a 10th-order aspherical coefficient.
  • a lens provided by an embodiment of the present application includes a diaphragm 901 and a lens system 902.
  • FIG. 9 only symbolically shows that the lens system 902 includes multiple a lens, in fact, the lens system 902 may be the lens system mentioned in any of the above embodiments; the diaphragm is used to control the amount of light passing through the lens, and may be disposed in the lens system according to a specific situation.
  • the aperture 901 is located before the lens system 902, and may also be disposed between the lenses of the lens system.
  • the lens 900 may further include other components such as a grating, a filter, and the like, and may be added according to a specific application scenario, which is not limited in the embodiment of the present application.
  • the lens provided by the embodiment of the present application can be applied to various devices for the specific shooting or observation function, such as a telescope, a camera, a mobile phone, and a camera.
  • the embodiment of the present application is not limited.
  • a camera module 1000 is provided in the embodiment of the present application.
  • the camera module 1000 includes a sensor chip 1001 and a lens 1002.
  • the sensor chip 1001 is located on the image side of the lens 1001 to implement imaging.
  • the lens 1001 includes a diaphragm 1003 and a lens system 1004. It is only symbolically shown in Fig. 10 that the lens system 1004 includes a plurality of lenses. In fact, the lens system 1004 may be the lens system mentioned in any of the above embodiments.
  • the light enters the lens system 1004 from the object side of the lens system 1004 through the aperture 1003, and after being concentrated and diverged by the respective lenses in the lens system 1004, reaches the photosensitive chip 1001, and the optical signal It is converted into an electrical signal by the action of the photosensitive chip 1001.
  • the camera module provided by the embodiment of the present application can be applied to various devices for the specific shooting or observation function, and the embodiment of the present application is not limited.
  • the embodiment of the present application further provides an electronic device, where the electronic device includes a processor and a camera device, and the camera device includes the lens system mentioned in any of the above embodiments, and the processor is configured to control loading to the lens.
  • the voltage outside the liquid lens in the system changes the curvature of the liquid lens.
  • the electronic device includes, but is not limited to, a personal computer, a server computer, a handheld or laptop device, a mobile device (such as a mobile phone, a mobile phone, a tablet computer, a personal digital assistant, a media player, etc.), a consumer electronic device.
  • the lens system provided by the embodiment of the present application can be used in an electronic device of a specific camera or camera function, such as a device, a small computer, a large computer, a film camera, a digital camera, a video camera, a monitoring device, and the like.
  • an electronic device provided by an embodiment of the present application includes a processor 1101 and an imaging device 1102.
  • the imaging device 1102 includes the lens system 1103.
  • the lens system 1103 is included.
  • a telephoto lens group 1104 and a liquid lens 1105 are included, and the processor 1101 can control a voltage applied outside the liquid lens 1105 to change the curvature of the liquid lens.
  • the camera device 1102 may further include components of a photosensitive chip, a diaphragm, a grating, and a filter.
  • the component may be added according to a specific application scenario to implement a camera function.
  • a metal coil for example, an iron ring
  • a magnet is disposed on an outer side of the liquid lens 1105, and the processor 1101 can load a voltage on a metal coil outside the liquid lens 1105, so that the metal coil is generated.
  • Current when the voltage applied by the processor 1101 changes, the current on the metal coil changes; the magnet generates a magnetic force to the metal coil through which the current is applied, so that the metal coil presses the liquid lens 1105, The curvature of the liquid lens 1105 is further changed.
  • the focal length is infinity as an example, and the method for controlling the curvature of the liquid lens 1105 by the processor 1101 is introduced:
  • the processor 1101 applies a voltage to the metal coil, so that the metal coil is pressed by the magnet under the action of the magnet.
  • the liquid lens 1105 increases the curvature of the liquid lens 1105, and the focal length of the lens system becomes smaller; conversely, if the object to be photographed is away from the electronic device, the processor 1101 can reduce the The voltage applied by the metal coil causes the metal coil to be pressed by the magnet to a smaller extent, so that the curvature of the liquid lens 1105 becomes smaller, and the focal length of the lens system becomes larger. .
  • the focal length at infinity means that the object distance of the telephoto lens group 1104 exceeds a certain range, and the object can be regarded as a light spot at infinity, the light spot is emitted.
  • the light beam can be seen as a state of parallel injection into the telephoto lens group 1104.
  • the manner in which the processor 1101 is loading a voltage and controlling the change of the curvature of the liquid lens 1105 is related to the focal length of the telephoto lens group 1104 and the object distance when the object is photographed. Taking the focal length of the telephoto lens group at infinity as an example, if the focal length of the telephoto lens group 1104 is other values, the processor 1101 needs to apply a voltage according to a specific scene, and change the The curvature of the liquid lens 1105.
  • the curvature of the liquid lens 1105 needs to be small, when the object distance is from the reference point. Moving and approaching the lens system 1103, the curvature of the liquid lens 1105 needs to be increased.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

L'invention concerne un système de lentilles (100), une lentille (1002), un module de caméra (1000) et un dispositif électronique. Le système de lentilles (100) comprend un groupe de lentilles à longue focale (101) et une lentille liquide (102). Le groupe de lentilles à longue focale (101) comprend séquentiellement un premier groupe de lentilles fixes (103) et un second groupe de lentilles fixes (104) le long d'un axe optique depuis un côté objet jusqu'à un côté image. La lentille liquide (102) est positionnée de chaque côté du groupe de lentilles à focale longue (101) ou entre le premier groupe de lentilles fixes (103) et le second groupe de lentilles fixes (104) le long de la direction de l'axe optique. La lentille liquide (102) est disposée dans le système de lentilles (100), une longueur focale variable peut être réalisée juste en changeant les tensions au niveau de deux côtés de la lentille liquide (102) sans déplacer les lentilles dans le groupe de lentilles à longue focale (101), et la netteté de l'imagerie peut être assurée.
PCT/CN2019/075756 2018-04-23 2019-02-21 Système de lentilles, lentille, module de caméra et dispositif électronique WO2019205789A1 (fr)

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CN201810368607.3A CN108732728A (zh) 2018-04-23 2018-04-23 一种透镜系统及镜头

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