Abstract: A laser machining system may include an opposite side camera to provide workpiece alignment from an opposite side of the system (i.e., the side opposite the laser machining process). The opposite side camera may be used with an air bearing positioning stage, and a portion of the stage and/or the opposite side camera may be moved to allow the opposite side camera to image a feature on the workpiece to be aligned. The opposite side alignment may be used with back side scribing and/or dual side scribing of a workpiece with alignment from one or both sides of the workpiece. Laser machining systems and methods may also be used to provide quasi-stealth scribing and multi-beam scribing.

Abstract: A multi-directional magical building block set includes a solid sphere, a rod and a tube able to connect to one another. The solid sphere has a circumference with multiple studs radially extending from the circumference of the solid sphere. The studs equally divide the circumference of the solid sphere. A through hole to receive a rod or a stud from another solid sphere is defined in the solid sphere perpendicular to a plane containing the studs. The tube has a through hole longitudinally defined to receive a rod or a stub extending from a solid sphere. Consequently, the blocks of the present invention can be assembled in multi-directions depending on the user's wish to arouse the user's imagination and originality.