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CN-121679839-B - Camera module and assembling method thereof

CN121679839BCN 121679839 BCN121679839 BCN 121679839BCN-121679839-B

Abstract

The invention discloses an image pickup module and an assembly method of the image pickup module, wherein the image pickup module comprises a first reflection component, a first lens component and a second reflection component, the first reflection component comprises a first reflection element and a first support, the first reflection element is used for reflecting light rays propagating along a first direction to propagate along a second direction, the first support is provided with a first surface, the second reflection component comprises a second reflection element and a second support, the second reflection element is used for reflecting the light rays propagating along the second direction to propagate along the first direction, the second support is provided with a second surface, the second surface is opposite to the first surface along the second direction, the first lens component is provided with a third surface and a fourth surface, an adjusting gap is formed between the third surface and the first surface and/or between the fourth surface and the second surface, and the adjusting gap is used for active alignment of the first lens component when the image pickup module is assembled, and an included angle between the first direction and the second direction is smaller than 90 degrees.

Inventors

  • LU PENG
  • HU GUOQUAN
  • XIONG SHI
  • WANG YUXIANG

Assignees

  • 宁波舜宇光电信息有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (15)

  1. 1. The camera module is characterized by comprising a first reflecting component, a first lens component and a second reflecting component which are sequentially arranged along an object side to an image side; The first reflecting component comprises a first reflecting element and a first bracket for mounting the first reflecting element, wherein the first reflecting element is used for reflecting light rays propagating along a first direction to propagate along a second direction, and the first bracket is provided with a first surface, and the first surface is positioned on the light emergent side of the first reflecting element; the second reflecting component comprises a second reflecting element and a second bracket for mounting the second reflecting element, wherein the second reflecting element is used for reflecting light rays propagating along a second direction to propagate along a first direction, and the second bracket is provided with a second surface, the second surface is positioned on the light entering side of the second reflecting element, and the second surface is opposite to the first surface along the second direction; The light rays are reflected at least twice in the first reflecting element, and the light rays are reflected at least twice in the second reflecting element; the first reflecting element is provided with a first incident surface, a first reflecting surface, a second reflecting surface and a first emergent surface, wherein the first incident surface is coplanar with the second reflecting surface, the first incident surface and the second reflecting surface are perpendicular to a first direction, an included angle alpha is formed between the first incident surface and the first reflecting surface, the angle alpha is smaller than 45 degrees, the first emergent surface is adjacent to the first reflecting surface and the second reflecting surface, light enters the first reflecting element from the first incident surface along a first direction, and the light sequentially passes through the reflection of the first reflecting surface and the second reflecting surface and is emitted from the first emergent surface along a second direction; The first lens component is used for receiving the light rays emitted from the first reflecting element and continuously transmitting the light rays to the second reflecting element along a second direction, and is provided with a third surface and a fourth surface which are oppositely arranged along the second direction, an adjusting gap is formed between the third surface and the first surface, and/or an adjusting gap is formed between the fourth surface and the second surface; when the camera module is assembled, the adjusting gap is used for active alignment of the first lens component, the relative position of the first lens component and the first reflecting element is determined by active alignment, and/or the relative position of the first lens component and the second reflecting element is determined by active alignment, so that the optical axis of the first lens component, the optical axis of the first light emitting surface of the first reflecting element and the optical axis of the second light entering surface of the second reflecting element coincide; The first direction is parallel to the height direction of the camera module, and an included angle between the first direction and the second direction is smaller than 90 degrees.
  2. 2. The camera module of claim 1, wherein the width of the adjustment gap is denoted as L in the second direction, and is 10 μm≤L≤100 μm.
  3. 3. The camera module of claim 1, wherein an angle α between the first incident surface and the first reflective surface is 27 ° or less and 39 ° or less.
  4. 4. The camera module of claim 1, wherein the second reflective element has a second entrance face, a third reflective face, a fourth reflective face, and a second exit face; The third reflecting surface is coplanar with the second emitting surface, and the third reflecting surface and the second emitting surface are perpendicular to the first direction, an included angle beta is formed between the second emitting surface and the fourth reflecting surface, and beta is smaller than 45 degrees; light enters the second reflecting element from the second incident surface along the second direction, sequentially passes through the reflection of the third reflecting surface and the fourth reflecting surface, and is emitted from the second emergent surface along the first direction.
  5. 5. The camera module of claim 4, wherein an angle β between the second exit surface and the fourth reflective surface is 27 ° or less and β or less than 39 °.
  6. 6. The camera module of any of claims 1-5, wherein the first lens assembly comprises a first lens group comprising at least one lens, a first carrier on which the third surface is formed toward the first reflective assembly, and a first drive assembly on which the fourth surface is formed toward the second reflective assembly, the first carrier having a first receiving cavity for receiving the first lens group and the first drive assembly, the first drive assembly for driving the first lens group in a second direction relative to the first carrier.
  7. 7. The camera module of claim 6, wherein the first carrier has a first side edge, and the first side edge is located above an optical axis of the first lens group along a height direction of the camera module; the second bracket is provided with a fifth surface which is obliquely arranged, and the fifth surface is positioned above the second reflecting element along the height direction of the camera module; The first driving component is provided with a flexible circuit board, and the flexible circuit board is led out from the first side edge and is attached to the fifth surface; one end of the flexible circuit board far away from the first driving component extends downwards from the fifth surface so as to be electrically connected with the imaging circuit board positioned on the light emergent side of the second reflecting element; Or the first driving component is provided with a first pin, the first pin is led out from the first side edge, the camera shooting module further comprises a driving circuit board attached to the fifth surface, and the first pin is electrically connected with the driving circuit board.
  8. 8. The camera module of claim 6, wherein the first carrier has a third side edge, the third side edge is located below the optical axis of the first lens group along the height direction of the camera module, and the first driving component has a second pin, and the second pin is led out from the third side edge and is electrically connected to an imaging circuit board located on the light emitting side of the second reflecting element.
  9. 9. The camera module of any of claims 1-5, further comprising a housing having a receiving space for receiving at least a portion of the first reflective assembly, at least a portion of the first lens assembly, and at least a portion of the second reflective assembly, the housing having a first mounting face for mounting the first reflective assembly for positioning the first reflective element and a second mounting face for mounting the second reflective assembly for positioning the second reflective element.
  10. 10. The camera module of claim 9, wherein a mounting opening is formed in a bottom surface of the housing, light emitted from the second reflecting element passes through the mounting opening and is received by the photosensitive chip, the first mounting surface is parallel to a second direction, the first mounting surface and the first reflecting component are oppositely arranged along a height direction of the camera module, the first reflecting component is mounted on the first mounting surface from top to bottom, the second mounting surface is parallel to the first direction, the second mounting surface and the second reflecting component are oppositely arranged along a length direction of the camera module, and the second reflecting component is mounted on the second mounting surface from bottom to top through the mounting opening.
  11. 11. The camera module of any of claims 1-5, further comprising a second lens group, the second lens group comprising at least one lens, the second lens group being located on an entrance side of the first reflective element, an optical axis of the second lens group coinciding with an optical axis of the first entrance surface of the first reflective element.
  12. 12. The camera module of claim 11, wherein the second lens group has positive optical power for converging light rays.
  13. 13. The camera module of claim 11, further comprising a second carrier having a second receiving cavity configured to receive the second lens group and the second drive assembly, and a second drive assembly configured to drive the second lens group relative to the second carrier in a first direction.
  14. 14. The camera module of any of claims 1-5, further comprising an imaging assembly comprising an imaging circuit board, and a light sensing chip secured to and electrically connected to the imaging circuit board, the light sensing chip being located on the light emitting side of the second reflective element for receiving and imaging light exiting the second reflective element.
  15. 15. A method of assembling a camera module according to any one of claims 1 to 14, comprising the steps of: a. Providing a first reflecting element, a first support, a second reflecting element and a second support, fixing the first reflecting element to the first support to form a first reflecting assembly, and fixing the second reflecting element to the second support to form a second reflecting assembly; b. Providing a shell, wherein the shell is provided with a first mounting surface, a second mounting surface and a mounting opening formed in the bottom surface of the shell, the first reflecting component is mounted on the first mounting surface from top to bottom, and the second reflecting component is mounted on the second mounting surface from bottom to top through the mounting opening; c. Providing a first lens assembly and an imaging assembly, placing the first lens assembly between the first reflecting assembly and the second reflecting assembly such that a third surface of the first lens assembly and a first surface of the first reflecting assembly are oppositely disposed along a second direction, and a fourth surface of the first lens assembly and a second surface of the second reflecting assembly are oppositely disposed along the second direction; d. Performing active alignment, and adjusting the position and angle of the first lens component in the adjustment gap according to an imaging result obtained by electrifying the imaging component; and fixing the first lens component after the position adjustment to at least one of the shell, the first reflecting component and the second reflecting component.

Description

Camera module and assembling method thereof Technical Field The present invention relates to the field of camera modules, and more particularly, to a camera module and an assembling method thereof. Background With the rapid development of mobile communication technology, portable electronic devices such as smart phones and tablet computers have become an indispensable tool in daily life and work of people. The camera module is an indispensable part of portable electronic equipment, and along with the further development of camera module technology, the demand of user to the camera module becomes more and more meticulous, and the camera module not only needs to satisfy miniaturized requirement, and its imaging quality also can directly influence user experience. In the related art, the height of the vertical camera module is directly limited by the focal length, so that the design trend of lightening and thinning of electronic equipment is difficult to meet, the traditional periscope camera module turns an optical path by 90 degrees through a reflecting module, and can simultaneously meet the requirements of high zooming and lightening and thinning, but the reflecting module and a lens module are generally assembled in a fixed mode, the relative positions of optical elements depend on machining precision, and when the optical path is turned by multiple reflections, the accumulated effect of manufacturing tolerance of each module causes remarkable optical axis alignment deviation and difficult guarantee of imaging quality. Disclosure of Invention An object of the present invention is to provide a camera module, which can improve the assembly accuracy of the camera module, thereby improving the imaging quality of the camera module. Another objective of the present invention is to provide an assembling method of an image capturing module, which is used for assembling the image capturing module. In order to achieve at least one of the above purposes, the invention adopts the technical scheme that the camera module comprises a first reflecting component, a first lens component and a second reflecting component which are sequentially arranged along an object side to an image side; the first reflecting component comprises a first reflecting element and a first bracket for mounting the first reflecting element, the first reflecting element is used for reflecting light rays which propagate along a first direction to propagate along a second direction, the first bracket is provided with a first surface, the first surface is positioned on the light outgoing side of the first reflecting element, the second reflecting component comprises a second reflecting element and a second bracket for mounting the second reflecting element, the second reflecting element is used for reflecting the light rays which propagate along the second direction to propagate along the first direction, the second bracket is provided with a second surface, the second surface is positioned on the light incoming side of the second reflecting element, the second surface is opposite to the first surface along the second direction, the first lens component is used for receiving the light rays which are emitted from the first reflecting element and continuously propagate along the second direction to the second reflecting element, the first lens component is provided with a third surface and a fourth surface which are opposite to each other along the second direction, the first surface and the second surface form an active alignment component or an active alignment gap between the first lens component and the second lens component and the first lens component or the second lens component, the active alignment component is formed by the first lens component and the active alignment component or the active alignment component, so that the optical axis of the first lens assembly, the optical axis of the first light emitting surface of the first reflecting element and the optical axis of the second light emitting surface of the second reflecting element are overlapped, wherein the first direction is parallel to the height direction of the image pickup module, and an included angle between the first direction and the second direction is smaller than 90 degrees. Preferably, the width of the adjustment gap is L in the second direction, and is 10 μm≤L≤100 μm. Preferably, the light is reflected at least twice in the first reflecting element and the light is reflected at least twice in the second reflecting element. Preferably, the first reflecting element is provided with a first incident surface, a first reflecting surface, a second reflecting surface and a first emergent surface, the first incident surface is coplanar with the second reflecting surface, the first incident surface and the second reflecting surface are perpendicular to a first direction, an included angle alpha is formed between the first incident surface and the first reflecting surface, the an