Abstract: A processing method includes: a step of setting a workpiece having a workpiece surface made of a material containing metal, on a precision processing machine; and a forming step of forming multiple grooves having a V-shaped cross-section, at intervals of a constant pitch in a predetermined area on the workpiece surface, using a tool provided in the precision processing machine to thereby form a V-groove pattern made up of the multiple grooves, in the predetermined area. In the forming step, each time one groove is formed, the relative position between the tool and the workpiece is moved in a direction intersecting the longitudinal direction of the groove and the angle of the groove face of the groove is gradually varied so that a uniform color can be visually recognized in every location in the predetermined area when the predetermined area is observed from a predetermined viewpoint.

Abstract: A processing method includes: a step of setting a workpiece having a workpiece surface made of a material containing metal, on a precision processing machine; and a forming step of forming multiple grooves having a V-shaped cross-section, at intervals of a constant pitch in a predetermined area on the workpiece surface, using a tool provided in the precision processing machine to thereby form a V-groove pattern made up of the multiple grooves, in the predetermined area. In the forming step, each time one groove is formed, the relative position between the tool and the workpiece is moved in a direction intersecting the longitudinal direction of the groove and the angle of the groove face of the groove is gradually varied so that a uniform color can be visually recognized in every location in the predetermined area when the predetermined area is observed from a predetermined viewpoint.

Abstract: A microscopic positioning device having machine rigidity and being capable of achieving nano-order positioning accuracy and a method of compensating tool position and orientation. A driving unit comprises two piezoelectric elements P1 and P2 arranged into alignment along an expanding/shrinking direction. Both ends of the piezoelectric element P1, facing in the expanding/shrinking direction, are fixed to a base member and a movable member, respectively. The other piezoelectric element P2 is fixed to the base member only at one end. A gap L is formed between the piezoelectric element P2 and the movable member. Where expanding displacement amounts of the piezoelectric elements P1 and P2 are a1 and a2, respectively, voltage applied to the piezoelectric elements P1 and P2 is so controlled to satisfy an equation, a1+a2=a?L. It is possible to position the movable member at a position within a maximum stroke a in the nano-order.

Abstract: A microscopic positioning device having machine rigidity and being capable of achieving nano-order positioning accuracy and a method of compensating tool position and orientation. A driving unit comprises two piezoelectric elements P1 and P2 arranged into alignment along an expanding/shrinking direction. Both ends of the piezoelectric element P1, facing in the expanding/shrinking direction, are fixed to a base member and a movable member, respectively. The other piezoelectric element P2 is fixed to the base member only at one end. A gap L is formed between the piezoelectric element P2 and the movable member. Where expanding displacement amounts of the piezoelectric elements P1 and P2 are a1 and a2, respectively, voltage applied to the piezoelectric elements P1 and P2 is so controlled to satisfy an equation, a1+a2=a≧L. It is possible to position the movable member at a position within a maximum stroke a in the nano-order.