US 11,988,945 B2
Optical imaging lens assembly, image capturing unit and electronic device
Po-Lun Hsu, Taichung (TW); and Tzu-Chieh Kuo, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on May 27, 2022, as Appl. No. 17/827,580.
Claims priority of application No. 110120062 (TW), filed on Jun. 2, 2021; and application No. 111116065 (TW), filed on Apr. 27, 2022.
Prior Publication US 2022/0390815 A1, Dec. 8, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 15/15 (2006.01); G03B 5/02 (2021.01); G03B 17/17 (2021.01)
CPC G03B 17/17 (2013.01) [G02B 13/0025 (2013.01); G02B 15/15 (2013.01); G03B 5/02 (2013.01); G03B 2205/0046 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An optical imaging lens assembly, having a zooming function, and the optical imaging lens assembly comprising, in order from an object side to an image side along an optical path:
a reflection group, comprising a prism, wherein the prism has positive refractive power, the prism has an object-side surface being convex, the prism comprises a reflection surface, and the reflection surface is configured to reflect an imaging light passing through the object-side surface of the prism and send the imaging light to an image-side surface of the prism; and
a lens group, comprising at least three lens elements arranged along the optical path, wherein each of the at least three lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side, the lens group comprises a movable group, and the movable group moves along a direction parallel to an optical axis in a zooming process;
wherein an axial distance between the object-side surface of the prism and an image surface as the optical imaging lens assembly focuses to a far distance is TLi, an axial distance between the object-side surface of the prism and the image surface as the optical imaging lens assembly focuses to a near distance is TLm, a focal length of the movable group as the optical imaging lens assembly focuses to the far distance is fGM, a focal length of the reflection group as the optical imaging lens assembly focuses to the far distance is fGR, an axial distance between a most object-side surface of the reflection group and a most image-side surface of the reflection group as the optical imaging lens assembly focuses to the far distance is DGR, a result of subtracting an axial distance from the image surface to the movable group as the optical imaging lens assembly focuses to the far distance from an axial distance from the image surface to the movable group as the optical imaging lens assembly focuses to the near distance is dTGM, and the following conditions are satisfied:
|TLi−TLm|/TLi<3.0E-3; and
1.0<fGM×DGR/(fGR×dTGM)<30.