Lens barrel and imaging module applying the same

A lens barrel, adapted to cooperate with an actuator, the lens barrel comprising:

• a barrel wall, extending from an object side to an image side around an optical axis, and having a lens barrel inner surface facing the optical axis and a lens barrel outer surface facing away from the lens barrel inner surface;
• and
• a sleeve, fixed on the lens barrel outer surface and having a sleeve inner surface facing the optical axis and a sleeve outer surface facing away from the sleeve inner surface, wherein a surface area of the sleeve outer surface is smaller than a surface area of the lens barrel outer surface;
• and
• the lens barrel satisfies a following conditional expression:
• S/Lmax≥1.600, so that the sleeve is adapted to be set within a scope where the lens barrel cooperates with the actuator to reduce a deformation generated after dispensing and curing the lens barrel and the actuator;
• where S is an overall length of the lens barrel along the optical axis, and Lmax is a distance between a position of the sleeve closest to the object side and a position of the lens barrel closest to the image side along a direction parallel to the optical axis,
• where a part of the sleeve outer surface and a part of the lens barrel outer surface are adapted to be a bonding surface.

An imaging module, comprising:

• a lens and an actuator, the lens comprising a lens barrel, and the lens barrel comprising:
• a barrel wall, extending from an object side to an image side around an optical axis, wherein the barrel wall has a lens barrel inner surface facing the optical axis and a lens barrel outer surface facing away from the lens barrel inner surface;
• and
• a sleeve, fixed on the lens barrel outer surface and having a sleeve inner surface facing the optical axis and a sleeve outer surface facing away from the sleeve inner surface, wherein a surface area of the sleeve outer surface is smaller than a surface area of the lens barrel outer surface, and a part of the sleeve outer surface and a part of the lens barrel outer surface are bonded to a carrier of the actuator by dispensing and curing.