A light shielding blade including a laminate in which a resin layer is sandwiched between two metal base materials, wherein the two metal base materials each have a specific rigidity of 20×10.sup.6 [Pa.Math.m.sup.3/kg] or more and a specific bending rigidity of 1.0 [Pa.sup.1/3.Math.m.sup.3/kg] or more, and wherein the resin layer has an elastic modulus of 1 GPa or more and a thickness of 65 μm or less.

A light shielding blade including a laminate in which a resin layer is sandwiched between two metal base materials, wherein the two metal base materials each have a specific rigidity of 20×10.sup.6 [Pa.Math.m.sup.3/kg] or more and a specific bending rigidity of 1.0 [Pa.sup.1/3.Math.m.sup.3/kg] or more, and wherein the resin layer has an elastic modulus of 1 GPa or more and a thickness of 65 μm or less.

The present disclosure provides a shutter structure (100) and a photographing device (1000). The shutter structure (100) includes a stator assembly (20), a rotor assembly (40), and a blade assembly (60). The stator assembly (20) includes a mounting member (24) and a cover (28). The rotor assembly (40) is sleeved over by the mounting member (24). The blade assembly (60) includes blades (62) rotatably connected to the cover (28). The rotor assembly (40) drives a guide rod (624) to drive the blades (62) to rotate around a rotating shaft (622).

Embodiments of the present disclosure provide a motor applicable to a shutter device, including a printed circuit board assembly with a winding, a stator iron core, a rotor, and a magnet mounted on the rotor. The printed circuit board assembly includes a first side and a second side. The stator iron core is mounted on the first side of the printed circuit board assembly, and the winding winds around the stator iron core. The rotor and the magnet are mounted on the second side of the printed circuit board assembly and spaced apart from the winding. In the embodiments of the present disclosure, the motor has a flat structure, thereby facilitating miniaturization of the shutter device. The embodiments of the present disclosure further provide a shutter device, and a photographing device including the shutter device.

A shutter device includes a light blocking unit and a voice coil motor. The voice coil motor includes a permanent magnet module, a guide track assembly and a coil assembly. The coil assembly is arranged on the guide track assembly, and the permanent magnet module is adapted to produce a magnetic field in the guide track assembly. The light blocking unit includes two shutter blades both connecting to the coil assembly. When energized, the coil assembly will produce a magnetic field having a direction same as or opposite to the direction of the magnetic field in the guide track assembly so that the coil assembly moves forward or backward along the guide track assembly to drive the two shutter blades to open or close. A method controls the shutter device. An exposure dose control method is used with a photolithography machine including the shutter device.

A shutter device includes a light blocking unit and a voice coil motor. The voice coil motor includes a permanent magnet module, a guide track assembly and a coil assembly. The coil assembly is arranged on the guide track assembly, and the permanent magnet module is adapted to produce a magnetic field in the guide track assembly. The light blocking unit includes two shutter blades both connecting to the coil assembly. When energized, the coil assembly will produce a magnetic field having a direction same as or opposite to the direction of the magnetic field in the guide track assembly so that the coil assembly moves forward or backward along the guide track assembly to drive the two shutter blades to open or close. A method controls the shutter device. An exposure dose control method is used with a photolithography machine including the shutter device.

An object of the present disclosure lies in that in an optical device including a blade mounted on a lens or in space in a lens, it is possible to achieve miniaturization and light weight of the entire equipped device, simplification of driving and simplification of assembling, by using a shape memory alloy in a driving portion. A blade driving device includes: a base member supporting a blade; a blade; a plate member having a caliber and constituting a blade chamber; a plate member having a caliber, constituting the blade chamber and covering the blade; a ring member rotatably shaft-supported and including a connecting portion connected to the blade; an elastic member held by the base member and the ring member; a shape memory alloy held by the base member and the ring member; a holding member for holding the shape memory alloy; and a wiring for power supply.

An object of the present disclosure lies in that in an optical device including a blade mounted on a lens or in space in a lens, it is possible to achieve miniaturization and light weight of the entire equipped device, simplification of driving and simplification of assembling, by using a shape memory alloy in a driving portion. A blade driving device includes: a base member supporting a blade; a blade; a plate member having a caliber and constituting a blade chamber; a plate member having a caliber, constituting the blade chamber and covering the blade; a ring member rotatably shaft-supported and including a connecting portion connected to the blade; an elastic member held by the base member and the ring member; a shape memory alloy held by the base member and the ring member; a holding member for holding the shape memory alloy; and a wiring for power supply.

A shutter assembly comprises a base coupled to a photosensor assembly, a flexure device supported by the base, and a shutter arm rotatably coupled to the base via the flexure device. An actuation mechanism is coupled to the shutter arm via the flexure device, and is operable, upon application of an electric field, to rotate the shutter arm from a first position to a second position (or to a third position) to manage light relative to a photosensitive device of the photosensor assembly. Upon rotation of the shutter arm to the second position, the flexure device stores energy such that, upon removal of the electric field, the flexure device releases the stored energy to return the shutter arm to the first position. A keeper magnet can be provided to maintain the shutter arm in the second (actuated) position, so that the electric field can be removed while the keeper magnet maintains a magnetic force to keep the shutter arm in the second position.

A shutter assembly comprises a base coupled to a photosensor assembly, a flexure device supported by the base, and a shutter arm rotatably coupled to the base via the flexure device. An actuation mechanism is coupled to the shutter arm via the flexure device, and is operable, upon application of an electric field, to rotate the shutter arm from a first position to a second position (or to a third position) to manage light relative to a photosensitive device of the photosensor assembly. Upon rotation of the shutter arm to the second position, the flexure device stores energy such that, upon removal of the electric field, the flexure device releases the stored energy to return the shutter arm to the first position. A keeper magnet can be provided to maintain the shutter arm in the second (actuated) position, so that the electric field can be removed while the keeper magnet maintains a magnetic force to keep the shutter arm in the second position.