Patent attributes
An exemplary method for assembling a lens unit and a light-receiving unit into a camera module is provided. The lens unit includes a mountable surface. The light-receiving unit includes a light-receiving surface and a mounting surface. The method includes a mountable surface detecting step, a mountable surface repositioning step, a mounting surface detecting step, a mounting surface repositioning step, and a mounting step. The mountable surface detecting and repositioning steps detect and reposition the lens unit to make the mountable surface perpendicular to the optical axis of the lens unit. The mounting surface detecting repositioning steps detect and reposition the light-receiving unit to make the mounting surface parallel to the light-receiving surface. The mounting step mounts the light-receiving unit to the lens unit in the manner that the mounting surface parallel to the light-receiving surface is biased against the mountable surface perpendicular to the optical axis.