a highly precision , super stable , structure compact and fully lockable ball joint mechanism optical mounts are presented . both stationary plate and movable plate have a partial - spherical hole or conical hole . facing spacing aligns the bases of the partial - spherical holes or conical holes ; a space adjustable cavity is formed . an external - spherical circumference shape optical element carrier plate fits and mates in the space adjustable combined cavity forms a ball joint mechanism , or an external - column circumference and edges chamfered optical element carrier plate fits and mates in the space adjustable combined internal - spherical shaped cavity forms an angle tilt - able and around axis swivel - able joint pair mechanism . a removable tooling for exporting a tilting and rotating movement to the optical element carrier plate are presented . locking ring pushes the movable plate to adjust the combined cavity and locking the optical element carrier plate and to lock optical element that is carried thereby .