WO2023272484A1 - Ensemble lentille d'imagerie, module de caméra et dispositif d'imagerie - Google Patents

Ensemble lentille d'imagerie, module de caméra et dispositif d'imagerie Download PDF

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Publication number
WO2023272484A1
WO2023272484A1 PCT/CN2021/103088 CN2021103088W WO2023272484A1 WO 2023272484 A1 WO2023272484 A1 WO 2023272484A1 CN 2021103088 W CN2021103088 W CN 2021103088W WO 2023272484 A1 WO2023272484 A1 WO 2023272484A1
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WO
WIPO (PCT)
Prior art keywords
lens group
lens
focal length
imaging
optical axis
Prior art date
Application number
PCT/CN2021/103088
Other languages
English (en)
Inventor
Daigo Katsuragi
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp., Ltd. filed Critical Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority to CN202180097790.8A priority Critical patent/CN117255970A/zh
Priority to PCT/CN2021/103088 priority patent/WO2023272484A1/fr
Publication of WO2023272484A1 publication Critical patent/WO2023272484A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
    • G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
    • 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

Definitions

  • the present disclosure relates to an imaging lens assembly, a camera module, and an imaging device, and more specifically, to an imaging lens assembly, a camera module, and an imaging device that are small and enable good optical performance.
  • a conventional imaging lens assembly secures a focal length of the imaging lens assembly within a restricted space by positioning a prism on an object side of a lens group.
  • the present disclosure aims to solve at least one of the technical problems mentioned above. Accordingly, the present disclosure needs to provide an imaging lens assembly, a camera module, and an imaging device.
  • an imaging lens assembly includes:
  • the first lens group is configured to change its position in an optical axis direction between a first shooting state, where the shooting at the short focal length is performed, and a lens storage state; and between a second shooting state, where the shooting at the long focal length is performed, and the lens storage state, and
  • the mirror is configured to form an optical path optically connecting the first lens group and the second lens group in the first shooting state, to form an optical path optically connecting the first lens group and the third lens group in the second shooting state, and to secure a storage space for the first lens group in the lens storage state.
  • a camera module includes:
  • the imaging lens assembly
  • a first image sensor including a first imaging surface on the short focal length side
  • a second image sensor including a second imaging surface on the long focal length side.
  • an imaging device includes:
  • a housing for storing the imaging lens assembly.
  • FIG. 1 is a diagram of a camera module according to the present disclosure illustrating a first lens group which changes its position in an optical axis direction between a first and a second shooting states and a lens storage state, and a mirror which changes its angle between the first and the second shooting states and the lens storage state;
  • FIG. 2 is a diagram of a camera module according to the present disclosure illustrating a mechanism which changes the position of the first lens group in the optical axis direction, and a mechanism which changes the angle of the mirror;
  • FIG. 3 is a configuration diagram of an optical system on a short focal length side in a camera module according to a first example of the present disclosure
  • FIG. 4 is a configuration diagram of an optical system on a long focal length side in a camera module according to the first example of the present disclosure
  • FIG. 5 is an aberration diagram of the optical system on the short focal length side in the camera module according to the first example of the present disclosure
  • FIG. 6 is an aberration diagram of the optical system on the long focal length side in the camera module according to the first example of the present disclosure
  • FIG. 7 is a configuration diagram of an optical system on a short focal length side in a camera module according to a second example of the present disclosure.
  • FIG. 8 is a configuration diagram of an optical system on a long focal length side in a camera module according to the second example of the present disclosure.
  • FIG. 9 is an aberration diagram of the optical system on the short focal length side in the camera module according to the second example of the present disclosure.
  • FIG. 10 is an aberration diagram of the optical system on the long focal length side in the camera module according to the second example of the present disclosure.
  • FIG. 11 is a configuration diagram of an optical system on a short focal length side in a camera module according to a third example of the present disclosure.
  • FIG. 12 is a configuration diagram of an optical system on a long focal length side in a camera module according to the third example of the present disclosure.
  • FIG. 13 is an aberration diagram of the optical system on the short focal length side in the camera module according to the third example of the present disclosure.
  • FIG. 14 is an aberration diagram of the optical system on the long focal length side in the camera module according to the third example of the present disclosure.
  • FIG. 15 is a configuration diagram of an optical system on a short focal length side in a camera module according to a fourth example of the present disclosure.
  • FIG. 16 is a configuration diagram of an optical system on a long focal length side in a camera module according to the fourth example of the present disclosure.
  • FIG. 17 is an aberration diagram of the optical system on the short focal length side in the camera module according to the fourth example of the present disclosure.
  • FIG. 18 is an aberration diagram of the optical system on the long focal length side in the camera module according to the fourth example of the present disclosure.
  • FIG. 19 is a configuration diagram of an optical system on a short focal length side in a camera module according to a fifth example of the present disclosure.
  • FIG. 20 is a configuration diagram of an optical system on a long focal length side in a camera module according to the fifth example of the present disclosure.
  • FIG. 21 is an aberration diagram of the optical system on the short focal length side in the camera module according to the fifth example of the present disclosure.
  • FIG. 22 is an aberration diagram of the optical system on the long focal length side in the camera module according to the fifth example of the present disclosure.
  • a camera module 11 to which the present disclosure applies is a collapsible camera module with a compact configuration in which a plurality of optical systems having different focal lengths partially share their elements.
  • an imaging lens 21 of the camera module 11 includes a first lens group 31 for shooting at a short focal length or a wide–angle shooting, and for shooting at a long focal length or a telephoto shooting, a second lens group 321 for shooting at the short focal length, and a third lens group 322 (i.e., a third lens group) for shooting at the long focal length.
  • the camera module 11 is configured to change a position of the first lens group 31 in an optical axis direction between a first shooting state, where shooting (i.e., imaging) of a subject (object) at the short focal length is performed, and a lens storage state where the imaging lens assembly 21 is stored in a housing of the camera module 11.
  • the camera module 11 is further configured to change whether or not an optical path which optically connects the first lens group 31 and the second lens group 321 is formed, between the first shooting state and the lens storage state.
  • the camera module 11 is further configured to change a position of the first lens group 31 in an optical axis direction between a second shooting state, where shooting of a subject at the long focal length is performed, and the lens storage state.
  • the camera module 11 is further configured to change whether or not an optical path which optically connects the first lens group 31 and the third lens group 322 is formed, between the second shooting state and the lens storage state.
  • Whether or not the optical path optically connecting the first lens group 31 and the second lens group 321 is formed depends on an angle of a mirror 33. Whether or not the optical path optically connecting the first lens group 31 and the third lens group 322 is formed also depends on an angle of the mirror 33.
  • the mirror 33 is positioned on an imaging side of the first lens group 31 on an object side of the second lens group 321 and the third lens group 322.
  • the optical axis direction of the first lens group 31 is perpendicular to optical axis directions of the second lens group 321 and the third lens group 322.
  • the optical axis directions of the second lens group 321 and the third lens group 322 are parallel to each other.
  • the second lens group 321 and the third lens group 322 are disposed opposite each other with respect to the mirror 33.
  • the mirror 33 is rotatable about a first end 33a on the second lens group 321 side of the mirror 33 and about a second end 33b on the third lens group 322 side of the mirror 33.
  • dash–dot lines represent the optical axes of the camera module 11 (hereinafter the same applies) .
  • the camera module 11 includes a first optical axis OA1, which is an optical axis of an optical system on the short focal length side, and a second optical axis OA2 which is an optical axis of an optical system on the long focal length side.
  • the first optical axis OA1 includes an optical axis OA31 of the first lens group 31 and an optical axis OA321 of the second lens group 321.
  • the optical axis OA31 of the first lens group 31 and the optical axis OA321 of the second lens group 321 are continuous with each other at an intersection 33c with the mirror 33.
  • the second optical axis OA2 includes an optical axis OA31 of the first lens group 31 and the optical axis OA322 of the third lens group 322.
  • the optical axis OA31 of the first lens group 31 and the optical axis OA322 of the third lens group 322 are continuous with each other at an intersection 33c with the mirror 33.
  • the optical axis OA321 of the second lens group 321 and the optical axis OA322 of the third lens group 322 may be located on the same straight line.
  • the first lens group 31 is configured to move to an opposite side of the mirror 33 during a switching from the lens storage state to the first shooting state, and during a switching from the lens storage state to the second shooting state.
  • the first lens group 31 is configured to move to the mirror 33 side during a switching from the first shooting state to the lens storage state, and during a switching from the second shooting state to the lens storage state.
  • the first lens group 31 is configured to change its position in an optical axis direction between the first and second shooting states and the lens storage state.
  • the mirror 33 is configured to rotate about the first end 33a toward the second lens group 321 side and tilt with respect to both of an optical axis direction of the first lens group 31 and an optical axis direction of the second lens group 321 during the switching from the lens storage state to the first shooting state. As a result, the mirror 33 is configured to form an optical path optically connecting the first lens group 31 and the second lens group 321 in the first shooting state.
  • the mirror 33 is further configured to rotate about the second end 33b toward the third lens group 322 side and tilt with respect to both of the optical axis direction of the first lens group 31 and an optical axis direction of the third lens group 322 during the switching from the lens storage state to the second shooting state. As a result, the mirror 33 is configured to form an optical path optically connecting the first lens group 31 and the third lens group 322 in the second shooting state.
  • the mirror 33 is further configured to rotate about the first end 33a toward an opposite side of the second lens group 321 and to be substantially perpendicular to the optical axis direction of the first lens group 31 during a switching from the first shooting state to the lens storage state. As a result, the mirror 33 is configured to secure a storage space for the first lens group 31 in the lens storage state subsequent to the first shooting state.
  • the mirror 33 is further configured to rotate about the second end 33b toward an opposite side of the third lens group 322 and to be substantially perpendicular to the optical axis direction of the first lens group 31 during a switching from the second shooting state to the lens storage state. As a result, the mirror 33 is configured to secure a storage space for the first lens group 31 in the lens storage state subsequent to the second shooting state.
  • the first lens group 31 is stored in the housing 4 in the lens storage state. Further, in the lens storage state, the mirror 33 is perpendicular to the optical axis direction of the first lens group 31 in order to secure a storage space of the first lens group 31.
  • the first lens group 31, the second lens group 321 and the third lens group 322 are held in barrels 261, 262, 263.
  • the camera module 11 switches from the lens storage state to the first shooting state when a predetermined user operation, which switches from the lens storage state to the first shooting state, is performed.
  • the camera module 11 pushes out the first lens group 31 stored in the housing 4 in a direction protruding from the housing 4, the direction being opposite to the mirror 33, by using a lens drive mechanism 24 during the switching from the lens storage state to the first shooting state.
  • the lens drive mechanism 24 may be an actuator such as a voice coil motor.
  • the camera module 11 drives the mirror 33 so as to form the optical path optically connecting the first lens group 31 and the second lens group 321 by using a mirror drive mechanism 25 during the switching from the lens storage state to the first shooting state.
  • the mirror driving mechanism 25 rotates the mirror 33 about the first end 33a toward the second lens group 321 side and tilts the mirror 33 with respect to both the optical axis direction of the first lens group 31 and the optical axis direction of the second lens group 321.
  • the optical path optically connecting the first lens group 31 and the second lens group 321 is formed as an optical path on the short focal length side.
  • the optical path optically connecting the first lens group 31 and the third lens group 322 is not formed.
  • a tilt angle ⁇ 1 of the mirror 33 in the first shooting state is 45°.
  • the reference of the tilt angle ⁇ 1 of 0° is the optical axis direction of the second lens group 321.
  • the tilt angle ⁇ 1 is in a range of 42°or more and 48° or less.
  • the mirror driving mechanism 25 may include actuators such as motors.
  • the mirror driving mechanism 25 may include a first actuator, a first motor, a second actuator and a second motor.
  • the first actuator is configured to enable a first rotating shaft (e.g., a shaft having a polygonal cross section) to fit and detach with respect to a hole (e.g., a polygonal hole) provided at the first end 33a of the mirror 33.
  • the first motor is configured to rotate the first rotating shaft directly or indirectly via a power transmission member such as a gear.
  • the second actuator is configured to enable a second rotating shaft (e.g., a shaft having a polygonal cross section) to fit and detach with respect to a hole (e.g., a polygonal hole) provided at the second end 33b of the mirror 33.
  • the second motor is configured to rotate the second rotating shaft directly or indirectly via a power transmission member such as a gear.
  • the mirror driving mechanism 25 having such a configuration enables the mirror 33 to rotate about the first end 33a during a switching to the first shooting state by rotating the first rotating shaft fitted in the hole at the first end 33a in a state where the second rotating shaft is detached from the hole at the second end 33b.
  • the mirror driving mechanism 25 enables the mirror 33 to rotate about the second end 33b during a switching to the second shooting state by rotating the second rotating shaft fitted in the hole at the second end 33b in a state where the first rotating shaft is detached from the hole at the first end 33a.
  • the mirror driving mechanism 25 is not limited to such a configuration and can be changed in various ways.
  • the camera module 11 switches from the lens storage state to the second shooting state when a predetermined user operation, which switches from the lens storage state to the second shooting state, is performed. As shown in FIG. 2, the camera module 11 pushes out the first lens group 31 stored in the housing 4 in a direction protruding from the housing 4 by using a lens drive mechanism 24 during the switching from the lens storage state to the second shooting state.
  • the camera module 11 drives the mirror 33 so as to form the optical path optically connecting the first lens group 31 and the third lens group 322 by using a mirror drive mechanism 25 during the switching from the lens storage state to the second shooting state.
  • the mirror driving mechanism 25 rotates the mirror 33 about the second end 33b toward the third lens group 322 side and tilts the mirror 33 with respect to both the optical axis direction of the first lens group 31 and the optical axis direction of the third lens group 322.
  • the optical path optically connecting the first lens group 31 and the third lens group 322 is formed as an optical path on the long focal length side. At this time, the optical path optically connecting the first lens group 31 and the second lens group 321 is not formed.
  • a tilt angle ⁇ 2 of the mirror 33 in the second shooting state is 45°.
  • the reference of the tilt angle ⁇ 2 of 0° is the optical axis direction of the third lens group 322.
  • the tilt angle ⁇ 2 is in a range of 42°or more and 48° or less.
  • the camera module 11 switches from the first shooting state to the lens storage state when a predetermined user operation, which switches from the first shooting state to the lens storage state, is performed.
  • the lens drive mechanism 24 retracts and stores the first lens group 31 in the housing 4 during the switching from the first shooting state to the lens storage state.
  • the mirror drive mechanism 25 drives the mirror 33 so as not to form the optical path optically connecting the first lens group 31 and the second lens group 321. More specifically, the mirror drive mechanism 25 rotates the mirror 33 about the first end 33a toward an opposite side of the second lens group 321 to make the mirror 33 perpendicular to the optical axis direction of the first lens group 31 during the switching from the first shooting state to the lens storage state.
  • the mirror 33 being perpendicular to the optical axis direction of the first lens group 31 makes it possible to secure a storage space for the first lens group 31.
  • the camera module 11 switches from the second shooting state to the lens storage state when a predetermined user operation, which switches from the second shooting state to the lens storage state, is performed.
  • the lens drive mechanism 24 retracts and stores the first lens group 31 in the housing 4 during the switching from the second shooting state to the lens storage state.
  • the mirror drive mechanism 25 drives the mirror 33 so as not to form the optical path optically connecting the first lens group 31 and the third lens group 322. More specifically, the mirror drive mechanism 25 rotates the mirror 33 about the second end 33b toward an opposite side of the third lens group 322 to make the mirror 33 perpendicular to the optical axis direction of the first lens group 31 during the switching from the second shooting state to the lens storage state.
  • the mirror 33 being perpendicular to the optical axis direction of the first lens group 31 makes it possible to secure a storage space for the first lens group 31.
  • the camera module 11 may switch between the first shooting state and the second shooting state according to a user operation.
  • the lens drive mechanism 24 may change a position of the first lens group 31 in its optical axis direction so as to be suitable for the changed shooting state during a switching between the first shooting state and the second shooting state.
  • the mirror drive mechanism 25 rotates the mirror 33 so that the angle of the mirror 33 is suitable for the changed shooting state during the switching between the first shooting state and the second shooting state.
  • the camera module 11 to which the present disclosure applies is configured as shown in FIG. 3, 4, 7, 8, 11, 12, 15, 16, 19 and 20, for example.
  • the camera module 11 includes an imaging lens assembly 21, a first optical filter 221 on the short focal length side, a second optical filter 222 on the long focal length side, a first image sensor 231 on the short focal length side, and a second image sensor 232 on the long focal length side.
  • the imaging lens assembly 21 is configured to change the position of the first lens group 31 in the optical axis direction.
  • the imaging lens assembly 21 is further configured to form the optical paths connecting the first lens group 31 and the rear lens groups 321, 322 in the first and second shooting states.
  • the imaging lens assembly 21 is configured not to form the optical paths in the lens storage state.
  • the imaging lens assembly 21 is designed to maintain its good optical performance despite its small size.
  • the first image sensor 231 is, for example, a solid-state image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) .
  • the first image sensor 231 has a first imaging surface S1 which is an imaging plane on the short focal length side of the imaging lens assembly 21.
  • the second image sensor 232 is also a solid-state image sensor, for example.
  • the second image sensor 232 has a second imaging surface S2 which is an imaging plane on the long focal length side of the imaging lens assembly 21.
  • the first image sensor 231 receives incident light from the subject (object side) via the imaging lens assembly 21 and the first optical filter 221, photoelectrically converts the light, and outputs an image data, obtained by photoelectric conversion of the light, to a subsequent stage.
  • the second image sensor 232 receives incident light from the subject via the imaging lens assembly 21 and the second optical filter 222, photoelectrically converts the light, and outputs an image data, obtained by photoelectric conversion of the light, to a subsequent stage.
  • the first optical filter 221 and the second optical filter 222 may be, for example, IR (infrared) filters which cut infrared light from incident lights.
  • the imaging lens assembly 21 includes an optical system on the short focal length side and an optical system on the long focal length side.
  • the optical system on the short focal length side includes the first lens group 31 including at least one lens having a positive refractive power, the second lens group 321 including at least one lens having a negative refractive power, and the mirror 33 positioned between the first lens group 31 and the second lens group 321.
  • the optical system on the long focal length side includes the first lens group 31 which is shared with the optical system on the short focal length side, the third lens group 322 including at least one lens having a negative refractive power, and the mirror 33 which is shared with the optical system on the short focal length side and is positioned between the first lens group 31 and the third lens group 322.
  • the first lens group 31 is configured to change its position in the optical axis directions between the first and second shooting states and the lens storage state, for example, by using the lens driving mechanism 24 mentioned above.
  • the mirror 33 is configured to form the optical path optically connecting the first lens group 31 and the second lens group 321 in the first shooting state, to form the optical path optically connecting the first lens group 31 and the third lens group 322 in the second shooting state, and to secure the storage space for the first lens group 31 in the lens storage state, for example, by using the mirror drive mechanism 25 mentioned above.
  • Aperture stop 34 is disposed between the most object side disposed lens of the first lens group 31 and the mirror 33.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (1) :
  • TLG2 is a focal length of the third lens group 322 (hereinafter the same applies) .
  • WLG2 is a focal length of the second lens group 321 (hereinafter the same applies) .
  • TLG2 /WLG2 deviates from the range of formula (1) , it is difficult to secure a balance of the optical performance between the optical system on the short focal length side and the optical system on the long focal length side, and thus it is difficult to maintain the optical performance.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (2) :
  • ⁇ Wd is a distance on the first optical axis OA1 of the imaging lens assembly 21 from a vertex of an object side surface of a most object side disposed lens of the first lens group 31 to the first imaging surface S1 on the short focal length side (hereinafter the same applies) . That is, ⁇ Wd is a full length of the imaging lens assembly 21 on the short focal length side.
  • the first optical axis OA1 includes the optical axis OA31 of the first lens group 31 and the optical axis OA321 of the second lens group 321 that are continuous with each other at the intersection 33c with the mirror 33.
  • ⁇ Td is a distance on the second optical axis OA2 of the imaging lens assembly 21 from a vertex of an object side surface of a most object side disposed lens of the first lens group 31 to the second imaging surface S2 on the long focal length side (hereinafter the same applies) . That is, ⁇ Td is a full length of the imaging lens assembly 21 on the long focal length side.
  • the second optical axis OA2 includes the optical axis OA31 of the first lens group 31 and the optical axis OA322 of the third lens group 322 that are continuous with each other at the intersection 33c with the mirror 33.
  • Yh_w is an image height of the first imaging surface S1 side or a half-diagonal length of the first imaging surface S1 (hereinafter the same applies) .
  • Yh_t is an image height of the second imaging surface S2 side or a half-diagonal length of the second imaging surface S2 (hereinafter the same applies) .
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (3) :
  • fw is a focal length of the imaging lens assembly 21 on the short focal length side (hereinafter the same applies) . That is, fw is a focal length of the optical system on the short focal length side.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (4) :
  • ft is a focal length of the imaging lens assembly 21 on the long focal length side (hereinafter the same applies) . That is, ft is a focal length of the optical system on the long focal length side.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (5) :
  • LG1 is a focal length of the first lens group 31 (hereinafter the same applies) .
  • LG1 /fw exceeds the upper limit value of the formula (5) , it is difficult to secure a balance of the optical performance between the optical system on the short focal length side and the optical system on the long focal length side, and thus it is difficult to maintain the optical performance.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (6) :
  • LG1 /WLG2 exceeds the upper limit value of the formula (6) , it is difficult to secure a balance of the optical performance between the optical system on the short focal length side and the optical system on the long focal length side, and thus it is difficult to maintain the optical performance.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (7) :
  • LG1 /TLG2 deviates from the range of the formula (7) , it is difficult to secure a balance of the optical performance between the optical system on the short focal length side and the optical system on the long focal length side, and thus it is difficult to maintain the optical performance.
  • the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively when the camera module 11 satisfies the following formula (8) :
  • ⁇ TLd1 is a distance on the optical axis OA31 of the first lens group 31 from a vertex of an object side surface of a most object side disposed lens of the first lens group 31 to the mirror 33 in the second shooting state (hereinafter the same applies) .
  • ⁇ WLd1 is a distance on the optical axis OA31 of the first lens group 31 from the vertex of the object side surface of the most object side disposed lens of the first lens group 31 to the mirror 33 in the first shooting state (hereinafter the same applies) .
  • an aspheric lens in the imaging lens assembly 21 is formed of a plastic material.
  • lenses having a size equal to or smaller than a specific size are preferably formed of a plastic material, and lenses larger than the specific size are preferably formed of a glass material. This is because it is difficult to form an aspheric lens or a relatively small lens using a material other than a plastic material.
  • Such a camera module 11 including the imaging lens assembly 21 can be used in compact digital devices (imaging devices) such as mobile phones, wearable cameras and surveillance cameras.
  • Si indicates the ordinal number of the i-th surface which sequentially increases from the object side toward the imaging surface S side.
  • Optical elements of the corresponding surfaces are indicated by the corresponding surface number “Si” .
  • Denotations of “first surface” or “1st surface” indicate a surface on the object side of the lens
  • denotations of “second surface” or “2nd surface” indicate a surface on the imaging surface S side of the lens.
  • “R” indicates the value of a central curvature radius (mm) of the surface.
  • E + i indicates an exponential expression with a base of 10, i.e., "10 i " .
  • “1.00 E +18” indicates “1.00 ⁇ 10 18 " .
  • Such an exponential expression also applies to an aspheric coefficient described later.
  • “Di” indicates a value of a distance on the optical axis between the i-th surface and the (i + 1) -th surface (mm) .
  • “Ndi” indicates a value of a refractive index at d-line (wavelength 587.6 nm) of the material of the optical element having the i-th surface.
  • “ ⁇ di” indicates a value of the Abbe number at d-line of the material of the optical element having the i-th surface.
  • the imaging lens assembly 21 used in the following examples includes lenses having aspheric surfaces.
  • the aspheric shape of the lens is defined by the following formula (9) :
  • Z is a depth of the aspheric surface
  • C is a paraxial curvature which is equal to 1 /R
  • h is a distance from the optical axis to a lens surface
  • K is a conic constant (second-order aspheric coefficient)
  • An is an nth-order aspheric coefficient.
  • the optical system on the short focal length side in the imaging lens assembly 21 includes, in order from the object side toward the first imaging surface S1 side, a first lens L1 belonging to the first lens group 31 and having a positive refractive power with convex surfaces facing the object side and the first imaging surface S1 side, a second lens L2 belonging to the first lens group 31 and having a negative refractive power, a mirror 33, a third lens L3w belonging to the second lens group 321 and having a positive refractive power with a convex surface facing the object side, and a fourth lens L4w belonging to the second lens group 321 and having a negative refractive power with concave surfaces facing the object side and the first imaging surface S1 side.
  • the aperture stop 34 is disposed between the second lens L2 and the mirror 33.
  • Table 1 shows lens data from the short focal length side of the first example.
  • the unit of length or distance shown in each of the following tables is mm.
  • Table 2 shows a focal length of each lens, a focal length LG1 of the first lens group 31, and a focal length WLG2 of the second lens group 321.
  • Table 3 shows the focal length fw of the imaging lens assembly 21 on the short focal length side, the F number Fno, the angle of view 2 ⁇ , the full length ⁇ Wd of the imaging lens assembly 21 on the short focal length side which is obtained when an object point is taken at infinity, the distance ⁇ WLd1 on the optical axis of the first lens group 31 from a vertex of an object side surface of a most object side disposed lens of the first lens group 31 to the mirror 33 in the first shooting state, the distance ⁇ WLd2 on the optical axis of the second lens group 321 from the mirror 33 to the first imaging surface S1, and the image height Yh_w of the first imaging surface S1 side.
  • Table 4 shows the aspheric coefficients on the short focal length side of the imaging lens assembly 21.
  • the optical system on the long focal length side in the imaging lens assembly 21 includes, in order from the object side toward the second imaging surface S2 side, a first lens L1 belonging to the first lens group 31 and having a positive refractive power with convex surfaces facing the object side and the second imaging surface S2 side, a second lens L2 belonging to the first lens group 31 and having a negative refractive power, a mirror 33, a third lens L3t belonging to the third lens group 322 and having a positive refractive power with a convex surface facing the object side, and a fourth lens L4t belonging to the third lens group 322 and having a positive refractive power with a convex surface facing the second imaging surface S2 side.
  • the first lens L1 and the second lens L2 are the same as those of the optical system on the short focal length side.
  • the aperture stop 34 is disposed between the second lens L2 and the mirror 33.
  • Table 5 shows lens data from the long focal length side of the first example.
  • Table 6 shows a focal length of each lens, a focal length LG1 of the first lens group 31, and a focal length TLG2 of the third lens group 322.
  • Table 7 shows the focal length ft of the imaging lens assembly 21 on the long focal length side, the F number Fno, the angle of view 2 ⁇ , the full length ⁇ Td of the imaging lens assembly 21 on the long focal length side which is obtained when an object point is taken at infinity, the distance ⁇ TLd1 on the optical axis of the first lens group 31 from a vertex of an object side surface of a most object side disposed lens of the first lens group 31 to the mirror 33 in the second shooting state, the distance ⁇ TLd2 on the optical axis of the third lens group 322 from the mirror 33 to the second imaging surface S2, and the image height Yh_t of the second imaging surface S2 side.
  • Table 8 shows the aspheric coefficients on the long focal length side of the imaging lens assembly 21.
  • Table 9 shows values corresponding to the conditional expressions.
  • FIG. 5 shows, as examples of aberrations, spherical aberration, astigmatism (field curvature) and distortion.
  • Each of these aberration diagrams shows aberrations with d-line (587.56 nm) as a reference wavelength.
  • spherical aberration diagram Aberrations with respect to g-line (435.84 nm) and C-line (656.27 nm) are also shown.
  • S indicates a value of aberration on a sagittal image surface
  • T indicates a value of aberration on a tangential image surface.
  • IMG HT indicates an image height. The same applies to aberration diagrams in other examples.
  • the camera module 11 in the first example can satisfactorily correct various aberrations to obtain superior optical performance despite being small in size.
  • optical system on the short focal length side in the imaging lens assembly 21 according to the second example is shown in FIG. 7.
  • Lens parameters like those in the first example are shown in Tables 10-13.
  • optical system on the long focal length side in the imaging lens assembly 21 according to the second example is shown in FIG. 8.
  • Lens parameters like those in the first example are shown in Tables 14-17.
  • Table 18 shows values corresponding to the conditional expressions.
  • FIG. 9 Aberrations on the short focal length side in the second example are shown in FIG. 9.
  • FIG. 10 Aberrations on the long focal length side in the second example are shown in FIG. 10.
  • the degree of freedom in designing the camera module 11 according to the present disclosure can be increased while obtaining the same effects as the first example.
  • the optical system on the short focal length side in the imaging lens assembly 21 according to the third example is shown in FIG. 11.
  • Lens parameters like those in the first example are shown in Tables 19 - 22.
  • the optical system on the long focal length side in the imaging lens assembly 21 according to the third example is shown in FIG. 12.
  • Lens parameters like those in the first example are shown in Tables 23 - 26.
  • Table 27 shows values corresponding to the conditional expressions.
  • FIG. 13 Aberrations on the short focal length side in the third example are shown in FIG. 13.
  • FIG. 14 Aberrations on the long focal length side in the third example are shown in FIG. 14.
  • the degree of freedom in designing the camera module 11 according to the present disclosure can be further increased while obtaining the same effects as the first example.
  • the optical system on the short focal length side in the imaging lens assembly 21 according to the fourth example is shown in FIG. 15.
  • the second lens group 321 further includes a fifth lens L5w other than the third lens L3w and the fourth lens L4w.
  • Lens parameters like those in the first example are shown in Tables 28 - 31.
  • the third lens group 322 further includes a fifth lens L5t other than the third lens L3t and the fourth lens L4t.
  • Lens parameters like those in the first example are shown in Tables 32 -35.
  • Table 36 shows values corresponding to the conditional expressions.
  • FIG. 17 Aberrations on the short focal length side in the fourth example are shown in FIG. 17.
  • FIG. 18 Aberrations on the long focal length side in the fourth example are shown in FIG. 18.
  • the degree of freedom in designing the camera module 11 according to the present disclosure can be further increased while obtaining the same effects as the first example.
  • the optical system on the short focal length side in the imaging lens assembly 21 according to the fifth example is shown in FIG. 19.
  • Lens parameters like those in the first example are shown in Tables 37 - 40.
  • the optical system on the long focal length side in the imaging lens assembly 21 according to the fifth example is shown in FIG. 20.
  • Lens parameters like those in the first example are shown in Tables 41 -44.
  • Table 45 shows values corresponding to the conditional expressions.
  • FIG. 21 Aberrations on the short focal length side in the fifth example are shown in FIG. 21.
  • FIG. 22 Aberrations on the long focal length side in the fifth example are shown in FIG. 22.
  • the degree of freedom in designing the camera module 11 according to the present disclosure can be further increased while obtaining the same effects as the first example.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • a feature defined as “first” and “second” may comprise one or more of this feature.
  • a plurality of means “two or more than two” , unless otherwise specified.
  • the terms “mounted” , “connected” , “coupled” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements which can be understood by those skilled in the art according to specific situations.
  • a structure in which a first feature is "on" or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are in contact via an additional feature formed therebetween.
  • a first feature "on” , “above” or “on top of” a second feature may include an embodiment in which the first feature is orthogonally or obliquely “on” , “above” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below” , “under” or “on bottom of” a second feature may include an embodiment in which the first feature is orthogonally or obliquely “below” , "under” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature.

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

L'invention concerne un ensemble lentille d'imagerie (21) qui comprend un premier groupe de lentilles (31) servant à prendre des photos à une distance focale courte et à une distance focale longue, un deuxième groupe de lentilles (321) servant à prendre des photos à la distance focale courte, un troisième groupe de lentilles (322) servant à prendre des photos à la distance focale longue, et un miroir (33) positionné sur un côté d'imagerie du premier groupe de lentilles (31) sur un côté objet du deuxième groupe de lentilles (321) et du troisième groupe de lentilles (322). Le premier groupe de lentilles (31) est conçu pour changer de position dans une direction d'axe optique entre un premier état de prise de vues et un état de rangement de lentilles et entre un deuxième état de prise de vues et l'état de rangement de lentilles. Le miroir (33) est configuré de façon à former un trajet optique entre le premier groupe de lentilles (31) et le deuxième groupe de lentilles (321), à former un trajet optique entre le premier groupe de lentilles (31) et le troisième groupe de lentilles (322), et à créer un espace de rangement pour le premier groupe de lentilles (31).
PCT/CN2021/103088 2021-06-29 2021-06-29 Ensemble lentille d'imagerie, module de caméra et dispositif d'imagerie WO2023272484A1 (fr)

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CN202180097790.8A CN117255970A (zh) 2021-06-29 2021-06-29 成像透镜组件、相机模块和成像设备
PCT/CN2021/103088 WO2023272484A1 (fr) 2021-06-29 2021-06-29 Ensemble lentille d'imagerie, module de caméra et dispositif d'imagerie

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PCT/CN2021/103088 WO2023272484A1 (fr) 2021-06-29 2021-06-29 Ensemble lentille d'imagerie, module de caméra et dispositif d'imagerie

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740898A (zh) * 2004-08-26 2006-03-01 佳能株式会社 摄像装置
CN1837880A (zh) * 2005-03-25 2006-09-27 鸿富锦精密工业（深圳）有限公司 镜头模组
JP2008242401A (ja) * 2007-03-29 2008-10-09 Canon Inc レンズ装置及び撮像装置
US20120218644A1 (en) * 2010-03-12 2012-08-30 Ability Enterprise Co., Ltd. Photographic and Projection Module and Electronic System Having the Same
CN110266922A (zh) * 2019-06-28 2019-09-20 Oppo广东移动通信有限公司 摄像头模组以及电子设备
CN111246070A (zh) * 2020-03-18 2020-06-05 南昌欧菲光电技术有限公司 摄像头模组及电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740898A (zh) * 2004-08-26 2006-03-01 佳能株式会社 摄像装置
CN1837880A (zh) * 2005-03-25 2006-09-27 鸿富锦精密工业（深圳）有限公司 镜头模组
JP2008242401A (ja) * 2007-03-29 2008-10-09 Canon Inc レンズ装置及び撮像装置
US20120218644A1 (en) * 2010-03-12 2012-08-30 Ability Enterprise Co., Ltd. Photographic and Projection Module and Electronic System Having the Same
CN110266922A (zh) * 2019-06-28 2019-09-20 Oppo广东移动通信有限公司 摄像头模组以及电子设备
CN111246070A (zh) * 2020-03-18 2020-06-05 南昌欧菲光电技术有限公司 摄像头模组及电子设备

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