A zoom lens includes, in order from an object side, a positive first lens unit configured not to move for zooming, two or more intermediate lens units configured to move for zooming, and a positive rear lens unit. A distance between each pair of adjacent lens units changes for zooming. The first lens unit includes, in order from the object side, a negative first sub lens unit configured not to move for focusing, a positive second sub lens unit configured to move for focusing, and a positive third sub lens unit. Specific conditional expressions are satisfied with respect to a focal length and a thickness of the first lens unit, focal lengths of the zoom lens at a wide angle end and a telephoto end, a backfocus, and a focal length of the first sub lens unit.

An optical imaging system includes a first lens group, a second lens group, and a third lens group, sequentially arranged from an object side, wherein the first lens group includes two lenses having negative and positive refractive power, the second lens group includes a plurality of lenses, and the third lens group includes two lenses having negative and positive refractive power.

The disclosure provides a zoom lens assembly, which sequentially comprises, from an object side to an image side along an optical axis thereof: a first lens group; a second lens group with a positive refractive power; and a third lens group with a negative refractive power. The second lens group and the third lens group move along the optical axis to implement continuous zooming. The zoom lens assembly has a wide-angle end position, a middle end position and a telephoto end position. EPD is an entrance pupil diameter of the zoom lens assembly, ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the zoom lens assembly, DTmax is a maximum value in effective radii of each lens in the first lens group, the second lens group and the third lens group, EPD and ImgH and DTmax satisfy: EPD*ImgH/DTmax>6.5 mm.

A zoom lens includes in order from an object side, a negative first lens unit and a rear lens unit including one or more lens units, an interval between adjacent lens units being changed during zooming, in which the first lens unit and the one or more lens units can be set to first, second and third zoom states, in which angles of view at first and second image heights at the first zoom state are respectively 160° or larger, in which a distortion at the first image height at the third zoom state is −30% or more, and the first image height, the second image height, a total length of the zoom lens at a wide angle end, and a focal length at the wide angle end are appropriately set.

An imaging lens includes a first lens group, a second lens group having positive refractive power, an aperture, and a third lens group having positive refractive power, sequentially disposed in that order from an object side to an image side. During a focusing from infinity to a short length, a combination of the second lens group, the aperture, and the third lens group as a single unit moves to the object side so as to reduce a distance to the first lens group. The second lens group includes four lenses of a second-first negative lens, a second-second positive lens, a second-third negative lens, and a second-fourth positive lens sequentially disposed in that order from the object side to the image side.

An image capturing lens system includes three lens groups including five lens elements. The three lens groups are, in order from an object side to an image side: first, second and third lens groups. The five lens elements are, in order from the object side to the image side: first, second, third, fourth and fifth lens elements. The first lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. At least one lens element has an inflection point. A focal length of the image capturing lens system is varied by changing axial distances between the three lens groups in a zooming process. The image capturing lens system has a long-focal-length end and a short-focal-length end. The second lens group is moved relative to the first lens group along an optical axis in the zooming process.

An imaging module (1000), an imaging method, and an electronic device (2000) are provided. The imaging module (1000) includes a zoom lens (100) and a photosensitive element (402). The zoom lens (100) includes a first lens group (10), a second lens group (20), and a third lens group (30). The imaging method include: during switching from a long focus to a short focus, controlling the second lens group (20) and the photosensitive element (402) to move towards an object side; and during switching from the short focus to the long focus, controlling the second lens group (20) and the photosensitive element (402) to move towards an image side.

An image sensing device includes a first light path changing element, a second light path changing element, and a plane lens. The first light path changing element includes a first light-incident side and a first light-emergent side, where the first light-incident side faces an image-capturing direction, the first light-emergent side faces a zoom optical axis, and there is an angle between the first light-incident side and the first light-emergent side. The second light path changing element includes a second light-incident side and a second light-emergent side, where the second light-incident side faces the zoom optical axis, the second light-emergent side faces an image-forming direction. An angle is between the second light-incident side and the second light-emergent side. An image-capturing light path passes through the first light-incident side, the first light-emergent side, the second light-incident side, and the second light-emergent side. The plane lens is disposed on the image-capturing light path.

An imaging lens comprises in order from an object, a first lens group of positive refractive power, a second lens group of positive refractive power, and a third lens group of negative refractive power. In focusing from infinity to a close object, the first lens group is fixed in position, and the second lens group and the third lens group are moved so that the distance between the first lens group and the second lens group is reduced, and the distance between the second lens group and the third lens group is increased. Further, the following conditional expression (1) is satisfied:
1.0<f1/f<2.5  (1) where f1: is the focal length of the first lens group, and f: the focal length of the entire system.

A lens barrel includes: a first lens; a first tube that holds the first lens and moves along an optical axis; a focusing lens; an actuator that drives the focusing lens; and a second tube that holds the focusing lens and the actuator and moves along the optical axis.