Transmission type optical deflector
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsAkihiro Tanaka, Masataka Nishiyama
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Abstract
A transmission type optical deflector wherein a prism holder is supported by a yoke member to rotate about a principal axis through an elastic device. A wedge-shaped transmission prism is provided on the prism holder to transmit and refract light. The prism holder and yoke member are respectively provided with a coil and a permanent magnet secured thereto, to produce a rotational motion of the prism holder in the forward and reverse directions about the principal axis due to an electromagnetic function. The transmission prism is partly cut away at the thick portion thereof so that the center of gravity of the transmission prism is identical to the principal axis in a section in which the principal axis appears as a point and the transmission prism appears as a wedge-shape.
Claims7
A transmission type optical deflector, comprising:
- a prism holder supported by a yoke member to rotate about a principal axis through an elastic member;
- a wedge-shaped transmission prism provided on said prism holder to transmit and refract light;
- wherein
- said prism holder and yoke member are provided with a coil and a permanent magnet secured thereto, respectively, to produce a rotational motion of the prism holder in the forward and reverse directions about the principal axis due to an electromagnetic function;
- and wherein
- said transmission prism is partly cut away at the thicker portion thereof, with a center of gravity of said transmission prism coincident with the principal axis in a section in which the principal axis appears as a point and said transmission prism appears as a wedge shape.
A transmission type optical deflector, comprising:
- a yoke member;
- a prism holder that is supported by said yoke member to rotate about a principal axis via an elastic member;
- a wedge-shaped transmission prism provided on said prism holder to transmit and refract light, said transmission prism being partly cut away at the thicker portion thereof, with a center of gravity of said transmission prism shifted to be coincident with the principal axis in a section in which the principal axis appears as a point;
- and
- a coil and a permanent magnet provided with said prism holder and yoke member, respectively, to produce a rotational motion of the prism holder in the forward and reverse directions about the principal axis due to an electromagnetic function.
Dependencies are inferred from the claim text.