摘要:
An image shake correction device for correcting image shake on the focal plane of an optical apparatus due to vibration of the optical apparatus such as a camera. A correction optical element is provided in the optical path of the principal optical system, the correction optical element is driven correspondingly to the detected image shake magnitude, and the image shake on the focal plane of an optical apparatus is corrected. A driving mechanism which utilizes shape memory alloy is used for driving a correction lens for correcting image shake.
摘要:
An actuator applied with shape memory alloy which can be operated in a wide operating temperature range and has a long life time. At a normal ambient temperature, when the first wire of the acting member made of shape memory alloy in which predetermined shape is memorized in advance, is heated, it is transformed to the memorized shape to enable the acting member to be moved. A relative low stress is generated at the first wire and its life-time is not shortened. In the case that the ambient temperature is increased to exceed a transformation starting temperature of the shape memory alloy, the second wire of shape memory alloy is transformed to the memorized shape to generate a high stress at the first wire and to increase the transformation starting temperature of the first wire. With such an arrangement as above, it is possible to operate the actuator applied with the shape memory alloy in a wide operating temperature range.
摘要:
To provide an image shake correcting optical apparatus using a small, lightweight engaging mechanism for the correction lens holder engaging mechanism. A ring-shaped engaging member 16 formed of shape memory alloy and having three engaging arms on its inside is located outside a lens holder 11 for a correction lens L3, and the engaging contacts 16b at the tips of the engaging arms 16a are pushed toward the center of the ring-shaped engaging member by means of coil springs 17. The engaging member 16 formed of shape memory alloy has a prescribed memorized shape so that the arms 16a will assume a retracted position, and where no heat is applied, the engaging contacts 16b of the engaging arms press onto the lens holder 11 for the correction lens L3 from the outside due to the spring force of the coil springs 17, and engages with and maintains in place the lens holder 11. Where heat is applied, the engaging arms 16a retract, whereupon the engagement of the lens holder 11 is terminated.
摘要:
An ultrasonic drive apparatus for preventing a slip between an object to be driven and a driving part of the apparatus to drive the object. The driving part includes an elastic member through which vibrations from electrical-mechanical converters are transmitted to the object. The elastic member can deform in a direction in which the object is driven. The driving part makes a predetermined locus to drive the object while the elastic member deforms in the direction so as to absorb the slip between the object and the driving part. The elastic member and the converters are mounted symmetrically relative to an axis which is generally perpendicular to the direction in which the object is driven, so that the object can be driven forward and backward.
摘要:
A system of manufacturing an actuator for driving a to-be-driven object by extension/contraction of a shape memory alloy, the system comprising: a mounting unit configured to mount the shape memory alloy between an actuator body and the to-be-driven object; and a heater configured to heat the shape memory alloy mounted by the mounting unit on a mounting path between the actuator body and the to-be-driven object to a predetermined temperature range.
摘要:
An art of a driving device for appropriately improving a response of an SMA actuator will be provided. A portable telephone 1 has an image stabilization system 10 for driving an image pickup unit 9 by a pair of driving members 15a and 15b functioning as actuators, thereby performing image stabilization. Driving members 15a and 15b are formed as a wire of shape memory alloy (SMA) and when a voltage is applied to both ends and a current is supplied, driving force is generated in the contraction direction. With respect to the wire diameter of the SMAs, the wire diameter of the SMAs is set between 10 μm and 80 μm, thus the mountability and response are improved appropriately.
摘要:
An image capturing device, including an rectangular image capturing element having long sides and short sides; an image capturing optical system forming an image of a subject on the rectangular image capturing element; a first driving device which moves the rectangular image capturing element in a first direction slanted by a predetermined angle from the long side and the short side of an outer shape of the rectangular image capturing element in a plane perpendicular to an optical axis of the image capturing optical system; and a second driving device which moves the rectangular image capturing element in a second direction slanted by a predetermine angle from the long side and the short side of the outer shape of the rectangular image capturing element in the plane perpendicular to the optical axis of the image capturing optical system, but the second direction differs from the first direction.
摘要:
An art of a driving device for appropriately improving a response of an SMA actuator will be provided. A portable telephone 1 has an image stabilization system 10 for driving an image pickup unit 9 by a pair of driving members 15a and 15b functioning as actuators, thereby performing image stabilization. Driving members 15a and 15b are formed as a wire of shape memory alloy (SMA) and when a voltage is applied to both ends and a current is supplied, driving force is generated in the contraction direction. With respect to the wire diameter of the SMAs, the wire diameter of the SMAs is set between 10 μm and 80 μm, thus the mountability and response are improved appropriately.
摘要:
An arrangement of the invention includes a base block 16, a cylindrical cam 14, as a rotary member, which is rotatably supported on the base block 16, and includes a contact portion on an outer periphery thereof for outputting a rotating force, a drive gear 21, as an oscillatory ring, which includes a contact portion on an inner periphery thereof, and is oscillated on a plane perpendicular to a rotation axis of the cylindrical cam 14 in contact with the contact portion of the cylindrical cam 14, parallel springs 23 through 26, as a position retainer, for retaining the position of the drive gear 21, and three or more shape metal alloy actuators (SMA) wires 35 through 38, as expandable and contractible actuators, with both ends of the each SMA wire being fixed to the base block 16 for contact with the drive gear 21.
摘要:
A lens-driver for driving a lens for compensating image blur caused by camera shaking has two driving-levers. In each driving-lever, one end is rotatably connected to a lens frame via a holding shaft and the other end is rotatably supported by a rotation shaft. Two driving levers are arranged generally on one straight line, and there is formed a generally perpendicular angle by a line connecting the holding shaft of one driving-lever and an optical center of the lens, and a line connecting the holding shaft of the other driving-lever and the optical center. Another lens-driver has two driving mechanisms. One driving mechanism drives the lens, and the other driving mechanism drives a shutter mechanism or an aperture mechanism. In the lens barrel, one mechanism occupies one half area and the other mechanism occupies the other half area.