Magnetic add-on lenses with alignment ridge

A camera module comprising:

• an enclosure having a surface that engages an alignment feature included in a housing that contains the camera module to position an optical axis of the camera module within 125×10−6 meters (125 μm) (0.0005 inch) of an optical axis defined by the alignment feature;
• a lens assembly including at least one moveable element;
• a voice coil motor coupled to the enclosure and moveably supporting the at least one moveable element of the lens assembly;
• and
• a plurality of magnets attached to the enclosure adjacent to the alignment feature and arranged to minimize interference with the voice coil motor and with movement of the at least one moveable element of the lens assembly, and to provide a magnetic attachment for a detachable lens that engages the alignment feature on an opposite side of the housing from the camera module.

A camera module comprising:

• an enclosure that provides an alignment feature that extends through a housing, which contains the camera module, and that defines an optical axis of the camera module;
• a lens assembly including at least one moveable element;
• a voice coil motor coupled to the enclosure and moveably supporting the at least one moveable element of the lens assembly;
• and
• a plurality of magnets attached to the enclosure adjacent to the alignment feature and arranged to minimize interference with the voice coil motor and with movement of the at least one moveable element of the lens assembly and to provide a magnetic attachment for a detachable lens that engages the alignment feature on an opposite side of the housing from the camera module.