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EP-4741903-A1 - OPTICAL LENS, CAMERA MODULE AND ELECTRONIC DEVICE

EP4741903A1EP 4741903 A1EP4741903 A1EP 4741903A1EP-4741903-A1

Abstract

An optical lens (10), a camera module (100), and an electronic device (1000) are provided. The optical lens (10) includes a front lens element group, a first reflector (18), and a rear lens element group that are sequentially arranged in a direction from an object side to an image side. The first reflector (18) is configured to reflect a ray from the front lens element group to the rear lens element group. The front lens element group is a fixed lens element group, and the first reflector (18) is rotatably disposed in the lens, to implement optical image stabilization.

Inventors

  • WANG, HENG
  • NIU, Yajun
  • MIYATANI, SOTA
  • TANG, WEI

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240830

Claims (15)

  1. An optical lens, comprising: a front lens element group, a first reflector (18), and a rear lens element group that are sequentially arranged in a direction from an object side to an image side, wherein the first reflector (18) is configured to reflect a ray from the front lens element group to the rear lens element group; and the front lens element group is a fixed lens element group, and the first reflector (18) is rotatably disposed in the lens to implement optical image stabilization.
  2. The optical lens according to claim 1, wherein the optical lens has an emergent optical axis (OA1) located on an image side of a center point (P2) of the first reflector (18), and the first reflector (18) is configured to rotate about a rotation point (P1); and a projection point (P3) of the rotation point (P1) on a straight line on which the emergent optical axis (OA1) lies is located on the emergent optical axis (OA1); or the projection point (P3) of the rotation point (P1) on the straight line on which the emergent optical axis (OA1) lies is located on a reverse extension line of the emergent optical axis (OA1), and an effective focal length EFL of the optical lens and a distance L between the projection point (P3) and the center point (P2) satisfy: L/EFL≤2.0.
  3. The optical lens according to claim 2, wherein the first reflector (18) is configured to perform image stabilization on a pitch axis and image stabilization on a yaw axis, and the rotation point (P1) is an intersection point of the pitch axis and the yaw axis.
  4. The optical lens according to claim 2 or 3, wherein the rear lens element group is configured to move along the emergent optical axis (OA1) as a whole to implement auto focus.
  5. The optical lens according to claim 2 or 3, wherein the rear lens element group comprises a first lens element group (G1) and a second lens element group (G2), and the first lens element group (G1) or the second lens element group (G2) is configured to move along the emergent optical axis (OA1), to implement auto focus.
  6. The optical lens according to claim 5, wherein a focal length of the first lens element group (G1) is positive, and a focal length of the second lens element group (G2) is negative.
  7. The optical lens according to claim 5 or 6, wherein the first lens element group (G1) comprises at least two lens elements, an Abbe number of at least one lens element is less than 45, and the second lens element group (G2) comprises at least one lens element.
  8. The optical lens according to any one of claims 1 to 7, wherein a focal length F1 of the front lens element group and an overall focal length Fs of the optical lens satisfy: |F1/Fs|>1.2.
  9. The optical lens according to any one of claims 1 to 8, wherein the optical lens further comprises a second reflector (21) located on an image side of the rear lens element group, and the second reflector (21) is configured to deflect a ray from the rear lens element group.
  10. The optical lens according to any one of claims 1 to 9, wherein a field of view of the optical lens is less than 60°.
  11. The optical lens according to any one of claims 1 to 10, wherein an image height of the optical lens is greater than 2 millimeters.
  12. The optical lens according to any one of claims 1 to 11, wherein a focal length of the rear lens element group is positive.
  13. The optical lens according to any one of claims 1 to 12, wherein the first reflector (18) is a mirror or a prism.
  14. A camera module, comprising an image stabilization motor and the optical lens according to any one of claims 1 to 13, wherein the image stabilization motor is configured to drive the first reflector (18) to implement optical image stabilization.
  15. An electronic device, comprising a pose sensor, a processing unit, and the camera module according to claim 14, wherein the pose sensor is configured to: collect shake information of the electronic device, and send the shake information to the processing unit, and the processing unit is configured to control the image stabilization motor based on the shake information.

Description

This application claims priority to Chinese Patent Application No. 202311648143.9, filed with the China National Intellectual Property Administration on December 4, 2023 and entitled "OPTICAL LENS, CAMERA MODULE, AND ELECTRONIC DEVICE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of photographing device technologies, and in particular, to an optical lens, a camera module, and an electronic device. BACKGROUND With progress of science and technology and economic development, people have increasingly higher requirements on a camera function of a portable electronic device. A camera module configured in the electronic device is required to implement long-focus shooting, and the electronic device is further required to have an optical image stabilization (optical image stabilization, OIS) function, to improve photographing quality and improve photographing experience of a user. FIG. 4 shows an optical lens having an optical image stabilization function. The optical lens includes a prism 1a and a plurality of lens elements 1b disposed on an image side of the prism 1a. The plurality of lens elements 1b form an imaging lens element group and image rays onto an image sensor 2. An image stabilization motor (not shown in the figure) may drive the prism 1a to perform shake compensation, to improve shooting quality. Currently, to facilitate image stabilization design, the prism 1a is usually arranged at an object side edge of an optical path, and the plurality of lens elements 1b used for imaging are arranged on the image side of the prism 1a. Because there are a large quantity of lens elements 1b and the lens elements 1b need to be arranged at intervals to implement auto focus, the optical lens has a large size in a Z-axis direction in FIG. 4, that is, the optical lens is long. This is unfavorable to internal structure design of the electronic device. SUMMARY Embodiments of this application provide an optical lens, a camera module, and an electronic device, so that when normal optical image stabilization is implemented, a size of the optical lens in a Z-axis direction can be reduced, that is, a length of the optical lens can be reduced, to facilitate internal structure design of the electronic device. According to a first aspect, an optical lens is provided, including a front lens element group, a first reflector, and a rear lens element group that are sequentially arranged in a direction from an object side to an image side, where the first reflector is configured to reflect a ray from the front lens element group to the rear lens element group; and the front lens element group is a fixed lens element group, and the first reflector is rotatably disposed in the lens, to implement optical image stabilization. In the optical lens provided in this embodiment of this application, the front lens element group is disposed on an object side of the first reflector, and the front lens element group includes at least one lens element. In other words, some lens elements of the optical lens may be disposed on the object side of the first reflector, but not all lens elements are disposed on an image side of the first reflector. In this way, because fewer lens elements are disposed on the image side of the optical lens, a size of the optical lens in a Z-axis direction can be reduced. That is, a length of the optical lens can be reduced. In this way, arrangement space of another component in an electronic device is expanded, an internal structure of the electronic device is effectively optimized, and difficulty in structure design and layout in the electronic device is reduced. This facilitates miniaturization and slimness design of the electronic device, and can improve user experience. The first reflector is configured to reflect a ray from the front lens element group to the rear lens element group, so that the optical lens can implement a periscope-type structural layout. The first reflector is rotatably disposed in the lens, and can rotate under driving of an image stabilization motor, to implement optical image stabilization and improve shooting quality of the optical lens. Because the front lens element group is a fixed lens element group, when performing optical image stabilization, the image stabilization motor needs to drive only the first reflector, and does not need to drive the front lens element group or the rear lens element group. Therefore, moving components for optical image stabilization are simplified, so that a workload of the image stabilization motor is small, a design requirement for the motor is reduced, and design of the image stabilization motor and a camera module becomes easier. However, because a lens element does not participate in shake compensation, a quantity of movable lens elements can be reduced, so that more lens elements can be fixedly disposed on an optical path, and relative positions of more lens elements become fixed. In th