LENS HAVING TWO LENS BARRELS, LENS MODULE, AND ASSEMBLING METHOD

摘要

The disclosure provides a double barrels lens, a lens module and an assembling method therefor. The double barrels lens includes a first barrel and a second barrel. The first barrel comprises a first end, a second end and a lens group received in the first barrel, and external screw threads are provided on an outer surface of the second end. The second barrel includes a first end surface, a second end surface and an inner surface, internal screw threads are provided on the inner surface. The internal screw threads of the second barrel are engaged with the external screw threads of the first barrel. A distance H between an optical center of the lens group and the second end surface of the second barrel, a focal length f of the lens group, and a correction coefficient α meet the expression: H = f + α, the correction coefficient is configured to correct a distance between the second end surface and an image sensor assembly, thereby enabling the focus of the lens group to be coincided with the center of an image sensor included in the image sensor assembly. The double barrels lens of the disclosure has a simple structure and a small EFL tolerance, and can accurately and quickly realize the coincidence of the focus of the lens with the center of an image sensor, thereby improving product yield after assembling with an image sensor assembly.