Micro-oscillation element having two rotational axes that are non-orthogonal to each other
A micro-oscillation element includes a movable main section, a first frame and a second frame, and a first connecting section that connects the movable main section and the first frame and defines a first axis of rotation for a first rotational operation of the movable main section with respect to the first frame. The element further includes a second connecting section that connects the first frame and the second frame and defines a second axis of rotation for a second rotational operation of the first frame and the movable main section with respect to the second frame. A first drive mechanism is provided for generating a driving force for the first rotational operation. A second drive mechanism is provided for generating a driving force for the second rotational operation. The first axis of rotation and the second axis of rotation are not orthogonal.
1. A micro-oscillation element, comprising:
a movable main section;
a first frame and a second frame;
a first connecting section that connects the movable main section and the first frame and defines a first axis of rotation for a first rotational operation of the movable main section with respect to the first frame;
a second connecting section that connects the first frame and the second frame and defines a second axis of rotation for a second rotational operation of the first frame and the movable main section with respect to the second frame;
a first drive mechanism for generating a driving force for the first rotational operation; and
a second drive mechanism for generating a driving force for the second rotational operation;
wherein the first axis of rotation and the second axis of rotation are not orthogonal; and
wherein the first frame has four sides including an electrode supporting side, apart of the first drive mechanism extending from said electrode supporting side of the first frame toward the movable main section, a part of the second drive mechanism extending from said electrode supporting side of the first frame toward the second frame.
2. The micro-oscillation element according to claim 1 , wherein at least one of the first drive mechanism and the second drive mechanism comprises a set of comb tooth-shaped electrodes.
3. The micro-oscillation element according to claim 1 , wherein the first drive mechanism and the second drive mechanism are operated under common control.
4. The micro-oscillation element according to claim 3 , wherein the first drive mechanism and the second drive mechanism are connected electrically in parallel.
5. The micro-oscillation element according to claim 1 , wherein the first drive mechanism and the second drive mechanism are electrically separated and operated under mutually independent control.
6. The micro-oscillation element according to claim 1 , wherein at least one of the first drive mechanism and the second drive mechanism comprises a first comb tooth-shaped electrode and a second comb tooth-shaped electrode,
at least one of the first comb tooth-shaped electrode and the second comb tooth-shaped electrode having a laminated structure which includes a first conductor section, a second conductor section, and an insulating section interposed between the first and second conductor sections.
7. The micro-oscillation element according to claim 1 , wherein at least one of the first drive mechanism and the second drive mechanism comprises a first comb tooth-shaped electrode and a second comb tooth-shaped electrode,
the first comb tooth-shaped electrode having a laminated structure which includes a first conductor section, a second conductor section, and an insulating section interposed between the first and second conductor sections,
the second comb tooth-shaped electrode having a third conductor section facing the first conductor section above the second conductor section when the micro-oscillation element is not driven.
8. The micro-oscillation element according to claim 7 , wherein the first conductor section and the third conductor section are of different lengths in the direction of rotational operation.
9. The micro-oscillation element according to claim 7 , wherein at least one of the first and second comb tooth-shaped electrodes has a base section and electrode teeth extending from the base section, the electrode teeth having regions that gradually increase in width or thickness towards the base section.
10. The micro-oscillation element according to claim 7 , wherein at least one of the first and second comb tooth-shaped electrodes has a base section and electrode teeth extending from the base section, the electrode teeth having regions that gradually increase in width as approaching the other comb tooth-shaped electrode.
11. The micro-oscillation element according to claim 1 , wherein the first connecting section has a cavity that becomes wider as approaching the movable main section, and the second connecting section has a cavity that becomes wider as approaching the first frame.
12. The micro-oscillation element according to claim 1 , wherein said part of the first drive mechanism, said part of the second drive mechanism, the first connecting section, and the second connecting section extend from said electrode supporting side of the first frame.