Abstract: A lens barrel includes: a lens holding frame holding a lens; a mounting member to which the lens holding frame is mounted; an inclination regulating member regulating a position of the lens holding frame with respect to the mounting member, thereby regulating inclination of the lens holding frame with respect to an optical axis; and an eccentricity regulating member regulating the position of the lens holding frame with respect to said mounting member, thereby regulating eccentricity of the lens holding frame with respect to the optical axis, in which the eccentricity regulating member is supported by said inclination regulating member.

Abstract: An objective lens assembly is provided, with a sleeve, a first positioning member arranged in the sleeve, which is housed displaceable in longitudinal direction of the sleeve and holds at least one lens, a first adjustment unit which brings the first positioning member into abutment on the inside of the sleeve such that the first positioning member rests against the inside of the sleeve in a first linear contact area and at the same time the displaceability of the first positioning member is maintained. More than one positioning member can be utilized along with multiple lenses and can utilize simple mechanical structures (e.g., blind- and through-holes and pins or shanks) and/or magnetic or magnetizable materials to maintain a desired position of the sleeve.

Abstract: An image pickup apparatus includes a first drive unit, a first lens unit configured to be driven by the first drive unit to perform a magnification-varying operation, a second drive unit, a second lens unit configured to be driven by the second drive unit, and a controller configured to control the first drive unit and the second drive unit so as to drive the second lens unit with reference to a position of the first lens unit in performing the magnification-varying operation. The controller controls the second lens unit so as to move only in a first direction in performing the magnification-varying operation.

Abstract: A driver includes: a first member that holds a lens; a second member to which the first member is fixed; and drive means for driving the second member, wherein a portion in which at least part of the drive means is accommodated is provided in the side surface of the second member.

Abstract: A motor includes a rotor having a magnet, a stator having two coils, and a controller configured to control excitations of the two coils. The stator includes first and second yokes excited by the coils, and first and second rotor detectors configured to detect a magnetic flux. The first yoke is arranged for each electric angle of 360°, and the second yoke shifts from the first yoke by an electric angle of 90°. The first rotor position detector is arranged at the same position as the first yoke. The controller generates an excitation switching signal for each coil based on detection signals from the first and second rotor position detectors, and excites a corresponding coil, and obtains first and second delay angles.

Abstract: A barrel unit includes a barrel, a holding member configured to hold an optical element, a cylindrical member configured to support the barrel and the holding member, and a driving unit configured to generate a thrust by electrifying in a magnetic field formed by a magnet and a yoke a coil fixed onto the cylindrical member and to drive the holding member in an optical axis direction of the optical element by using the thrust. The yoke, the magnet, and the coil are located outside of a part of the cylindrical member which supports the barrel.

Abstract: Provided are a lens driving motor and an elastic member of the lens driving motor. The elastic member of a lens driving motor, the elastic member includes a first spring and a second spring. The second spring is different from the first spring and disposed together with the first spring on one side of a carrier to support the carrier. A first lead line of a coil and a first external power source are connected to the first spring, and a second lead line of the coil and a second external power source are connected to the second spring to supply power to the coil. Since the carrier can be assembled to other part after a (+) lead line and a (?) lead line of the coil are connected to the first and second springs, respectively, using solder, a process is simple and convenient.

Abstract: Disclosed is a lens driving apparatus. The lens driving apparatus includes a base formed at a center thereof with a first opening; a housing coupled with the base and having a second opening corresponding to the first opening; a yoke installed on the base and including a horizontal plate having a third opening corresponding to the first opening and a vertical plate protruding upward from the horizontal plate; a bobbin movably installed in the yoke and coupled with a lens module; a coil fixedly disposed around the bobbin; a plurality of magnets provided at the vertical plate of the yoke to face the coil; and a spring installed on at least one of upper and lower portions of the yoke to return the bobbin, which has moved up due to interaction between the magnet and the coil, to its initial position.

Abstract: An imaging apparatus includes a first lens barrel, a second lens barrel disposed side by side with the first lens barrel in a direction perpendicular to an optical axis of the first lens barrel, a reference metal sheet including a mounted surface portion mounted on a surface perpendicular to the optical axis of the first lens barrel and a reference surface portion facing an optical axis direction, an adjustment metal sheet including a base surface portion mounted on a surface perpendicular to an optical axis of the second lens barrel and an adjustment surface portion facing an optical axis direction and positioned side by side with the reference surface portion in state of being separated in the optical axis direction, and an adjustment section changing a direction of the adjustment surface portion to reference surface portion and adjusting a direction of optical axis of second lens barrel.

Abstract: A lens mount for a strip lens is provided, in which the strip lens can be deformed substantially perpendicular to its optical axis, in order to linearize the imaging of a beam scanning over the strip lens. The lens mount includes a slotted distance strip, a support strip and a base plate. The support strip is rigidly connected to the strip lens via the distance strip that has only a very low bending stiffness and can be deformed relative to the base plate by means of adjusting screws, whereby the strip lens can be deformed. By inserting a distance strip, the installation space that is required for the lens mount is essentially moved away from the optical axis in order to provide, for example, installation space for adjacent optical or mechanical components.

Abstract: The motor driving apparatus includes a motor driving a driven member, and a controller performing, from a start of driving of the motor, acceleration drive of the motor on the basis of a predetermined acceleration pattern with open-loop control, and then perform, in response to increase of a driving speed of the motor or the driven member to a predetermined speed, drive of the motor with feedback control. The controller changes the predetermined acceleration pattern and the predetermined speed depending on a magnitude of a load acting on the motor or the driven member.

Abstract: A projector includes: an electro-optic device which modulates light emitted from a light source; a projection lens which projects the light modulated by the electro-optic device; and a lens shift mechanism which shifts the projection lens in a direction perpendicular to the optical axis of the projection lens, wherein the lens shift mechanism includes a shift unit which supports the projection lens and shifts the projection lens in the direction perpendicular to the optical axis, a guide unit which guides the shift of the shift unit, and a drive unit which moves the shift unit, and the drive unit includes a rotation section as a rotated part which has a first bevel gear rotating around a center axis extending in the same direction as that of the optical axis, and a transmission section which has a second bevel gear engaging with the first bevel gear and transmits the rotation of the rotation section to the shift unit.

Abstract: An optical mount is used for mounting an optical element, such as a beam splitter or a mirror, to a housing. The optical mount includes a pair of optical element retainer clamps that secure a first side of the optical element at respective first securement points on one of the major surfaces of the optical element, and also engage a first edge. A whiffletree retainer clamp secures a second side of the optical element at a second securement point on the one of its major surfaces. The whiffletree retainer clamp couples a whiffletree retainer to the housing, with the whiffletree retainer engaging a second edge along the second side of the device. The whiffletree retainer is positionally adjustable, for example able to pivot. Pivot pads may be used in at least some of the engagements to secure the optical element. The pivot pads may be segments of ball bearings.

Abstract: A lens barrel according to an embodiment of the present invention includes a fixed barrel, a movable member that is movable relative to the fixed barrel, a flexible circuit board that is bent in a U-shape and hangs between the fixed barrel and the movable member, and a flexible circuit board guide. The flexible circuit board guide secures one side of the flexible circuit board that is continuous with the bent portion of the flexible circuit board to the fixed barrel while the one side of the flexible circuit board extends in a moving direction of the movable member.

Abstract: An optical module includes a first optics group, a second optics group, and an image sensor, wherein the first optics group and second optics group are configured to provide an image having a focus and a magnification to the image sensor. In some embodiments of the present invention, a first optics assembly includes a first optics group coupled to a threaded portion of a first lead screw so that rotation of the first lead screw results in translation of the first optics group along an axis of the first lead screw, a first actuator for rotating the first lead screw; and a first sensing target configured to permit detection of rotation of the first lead screw.

Abstract: A lens barrel having: an imaging optical system including, a moving lens group movable in a direction of an optical axis, a first aperture disposed on an object side of the moving lens group, and a second aperture disposed on an image plane side of the moving lens group; a first optical path regulating section formed on the image plane side of the first aperture; and a second optical path regulating section integrally formed with a holding frame for holding the moving lens group, wherein the first optical path regulating section and the second optical path regulating section are configured to block, of light fluxes that pass through the first aperture to enter the second aperture, those that do not pass through the second lens group as a moving lens.

Abstract: The subject matter disclosed herein relates to an imaging device having a small form factor.

Abstract: An optical device includes a soft polymer film having a first and second surface. A first compliant electrode is connected to the first surface and a second compliant electrode is connected to the second surface. A rigid optical element is connected on the first and/or second surface or integrated into the polymer film.

Abstract: A lens device includes a fixed lens, a rotatable lens barrel, and a base. The fixed lens includes at least one cam groove which has an opening portion. The rotatable lens barrel is sleeved within the fixed lens. The rotatable lens barrel includes at least one cam follower. The cam follower enters the cam groove through the opening portion and moves along the cam groove. The base is assembled to the fixed lens. The base includes at least one protruding structure. The protruding structure extends to the cam groove through the opening portion.

Abstract: A two-axis, optical mount provides two sets of flexural elements monolithically and homogeneously formed of a single material with, and interconnecting, three rigid segments. Between each pair of rigid segments, beginning with the first and second, a set of extensions is formed to have a cross section that permits simple, easy, independent adjustment therebetween. Likewise, a flexural set exists between the second and third rigid elements. Meanwhile, the rigid elements have section moduli sufficiently great as to be orders of magnitude larger than the flexural stiffness or section modulus of the flexures, thus providing flexures that operate in the elastic mode and introduce no joint type accuracy errors in adjustment.

Abstract: The disclosure relates to an optical system, such as a projection exposure apparatus for semiconductor lithography, including a manipulable correction arrangement for reducing image aberrations. In some embodiments, the system includes at least one manipulator configured to reduce image aberrations. The manipulator can include at least one optical element which can be manipulated by at least one actuator. The manipulator can be formed in changeable fashion together with an actuator.

Abstract: A lens barrel comprises barrier blades that open and close in a directional orthogonal to an optical axis; an optical system retention frame that includes a first surface along a direction orthogonal to the axis, the optical system retention frame retaining the optical system and movable with respect to the barrier blades in a direction along the axis; and a coupling plate includes a second surface relatively movable with respect to the first surface, the coupling plate causing the barrier blades to open and close by the coupling plate rotating about the axis; wherein, when the barrier blades are opened, the first surface is can move in the axis direction without abutting against the second surface and, when the barrier blades are closed, the first surface abuts against the second surface and movement of the first surface in the axis direction is restricted.

Abstract: A lens barrel including a telescopic cylinder configured to be accommodated within a fixed frame; a plurality of lens groups configured to be retained in the telescopic cylinder; a lens driving device configured to drive the plurality of lens groups along a longitudinal axis of the telescopic cylinder between a collapsed position in which at least one portion of the plurality of lens groups is stored in the fixed frame and an extended position in which the at least one portion of the plurality of lens groups is extended out of the fixed frame; and a retractable lens group configured to be retracted into the fixed frame through an opening in a wall of the fixed frame when the telescopic cylinder is in the extended position.

Abstract: Provided is a lens driving unit for an optical pickup and an optical disc drive that employs the lens driving unit. The lens driving unit includes a lens frame in which an object lens and a plurality of driving coils are installed, and a plurality of suspension wires connected to the driving coils. The lens frame also includes a plurality of winding posts disposed on opposing sides of the lens frame and extending in a direction in which the suspension wires extend. According to various examples, coil ends of the driving coils are wound around the winding posts to electrically connect the driving coils to the suspension wires.

Abstract: A piezoelectric actuator having reduced sizes, a lens barrel and an optical device. A piezoelectric actuator is provided with: a first actuator including first piezoelectric elements to be displaced in a first direction; a second actuator, which includes second piezoelectric elements to be displaced in a second direction intersecting with the first direction, and is arranged in a direction intersecting with the first direction with respect to the first actuator; and a relative displacement member, which is arranged between the first actuator and the second actuator and can be relatively displaced in the first direction with respect to the first actuator.

Abstract: Provided are a lens driving motor and an elastic member of the lens driving motor. The elastic member of a lens driving motor, the elastic member includes a first spring and a second spring. The second spring is different from the first spring and disposed together with the first spring on one side of a carrier to support the carrier. A first lead line of a coil and a first external power source are connected to the first spring, and a second lead line of the coil and a second external power source are connected to the second spring to supply power to the coil. Since the carrier can be assembled to other part after a (+) lead line and a (?) lead line of the coil are connected to the first and second springs, respectively, using solder, a process is simple and convenient.

Abstract: Disclosed herein is a lens actuating module for realizing focus adjustment and optical zooming. The lens actuating module includes a rod which is disposed on one side of a lens barrel on which at least one lens is mounted, and has an axis direction corresponding to an optical axis direction of the lens barrel, a driving force transmission member which has a conjoining recess to be conjoined with an outside surface of the rod and has magnetism so as to be conjoined with the outside surface of the rod due to a magnetic force, and a piezoelectric actuator which is disposed on one side of the driving force transmission member in the optical axis direction to provide an axis direction driving force to the rod via the driving force transmission member.

Abstract: The present invention provides a supporting device that supports an optical element, comprising: a first supporting member that is fixed to an outer circumference of the optical element; a plurality of members that is connected to an outer circumference of the first supporting member; and a second supporting member that supports the first supporting member via the plurality of members, wherein each of the plurality of members is configured such that the a rigidity thereof in a first direction inclined relative to a direction orthogonal to an optical axis of the optical element in a plane including the optical axis is lower than a rigidity thereof in each of two directions that are orthogonal to the first direction and that are orthogonal to each other.

Abstract: A lens barrel that can realize increased shooting magnification and slimming down of an image pickup apparatus without increasing drive load and optical accuracy error in driving the lens barrel along an optical axis. A cam follower follows cam grooves in a cam cylinder to move along the optical axis, and engages with a lens holding frame to move the same from a retracted state to a shooting state. A compression coil spring urges the cam follower and the lens holding frame in such a direction as to draw them away from each other, and when the cam follower moves from the shooting state to the retracted state, engages with the lens holding frame to move the same toward an image plane. A fixed portion coming into abutment with the lens holding frame restricts movement of the lens holding frame toward the image plane.

Abstract: Provided is a lens barrel comprising a lens holding member that holds a lens; a guide bar that has a magnetic pattern in which a pair of magnetic poles repeat in a longitudinal direction and that has the longitudinal direction thereof oriented in a direction of an optical axis of the lens to guide the lens holding section to move in the direction of the optical axis; a control portion that is disposed on an outer circumferential surface of the lens holding member and that includes a magnetic body generating magnetic force between itself and the magnetic pattern of the guide bar; and a drive coil that is arranged in a manner to not contact the guide bar and that generates magnetic drive force between itself and the guide bar.

Abstract: In a lens driving device, a rack gear portion is used as a gear portion so that the gear portion can be disengaged from the terminal end of the lead screw in the radial direction. To efficiently utilize a guide shaft formed with high precision, the guide shaft extends through a spring supporting frame of a lens holder that holds a lens, a movable member having the rack gear portion that meshes with the lead screw, whereby the movable member and the lens holder are linearly guided along the guide shaft, and the guide shaft also serves as the rotation axis of the movable member. A compression coil spring is wound around the guide shaft, and the rack gear portion is pressed against the lead screw by using the compression coil spring.

Abstract: A voice coil motor includes a movable barrel and a spring plate. The movable barrel includes a top end and a number of locating members. Each locating member includes a locating post on the top end, and a blocking portion on the locating post. The spring plate includes a top surface, a bottom surface, and an inner frame. The spring plate defines a through hole passing through the top surface and the bottom surface. The inner frame surrounds the through hole. The inner frame defines a number of locating holes. Each locating hole receives a corresponding locating post. The spring plate is positioned between the blocking portions and the top end. The blocking portions lock the inner frame to the movable barrel. The inner surface of each locating hole defines spaced gaps. Each gap passes through the top and the bottom surfaces.

Abstract: A voice coil motor includes an outer shell, a fastening member, magnetic members, a base, first and second elastic members, and a movable assembly. The outer shell has a through hole defined therein and includes sidewalls surrounding the through hole. The first elastic member includes a ring-shaped first elastic portion. The fastening member fastens the first elastic member on the outer shell. The magnetic members are mounted on the inside of the sidewalls, respectively. The second elastic member is fixed on the base and includes a ring-shaped second elastic portion. The movable assembly includes a retainer wrapped in a coil of wire, the retainer is connected to the first and second elastic portions, and is movable in the outer shell under an interaction between the magnetic members and the coil of wire. A camera module using the voice coil motor is also provided.

Abstract: A lens module includes a lens barrel, a first lens, a second lens, and a spacer. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The first lens is received in the lens barrel, and adjacent to the object-side end. The second lens is received in the lens barrel, and adjacent to the image-side end in relative to the first lens. The spacer is an annular plate, and includes an object-side surface, an image-side surface opposite to the object-side surface, and an inner sidewall. The spacer is positioned between the first lens and the second lens. The object-side surface faces the first lens, and the image-side surface faces the second lens. The intersection of the object-side surface and the inner sidewall forms a chamfer.

Abstract: An optical module includes at least a carrying stage, at least an actuator unit and at least an optical assembly. The carrying stage has a first aperture. The actuator unit is disposed at one side of the carrying stage and has a second aperture. The optical assembly is connected with the actuator unit, and the actuator unit adjusts the position of the optical assembly. A radiated wave enters from one side of the optical module and passes through the first aperture, the second aperture and the optical assembly. A microscope with the optical module has compact size and is easily assembled and carried. The optical module and microscope can efficiently reduce the effect of ambient temperature variations so as to improve the measuring stability thereof.

Abstract: An exemplary piezoelectric actuator includes a fixed barrel defining a first receiving cavity, a movable barrel in the first receiving cavity for receiving a lens module, a piezoelectric driving module driving the movable barrel to move relative to the fixed barrel along an optical axis of the lens module, and a preloading module. The movable barrel defines a second receiving cavity for receiving the lens module. The piezoelectric driving module includes a piezoelectric member attached on the sidewall of the fixed barrel, and a friction member attached on the sidewall of the movable barrel. The piezoelectric member is opposite to the friction member. The preloading module is arranged between the fixed barrel and the movable barrel. The preloading module is opposite to the piezoelectric driving module for exerting a pressure to the movable barrel, thereby making the friction member resist against the piezoelectric member.

Abstract: A projector includes an optical module, a lens and a heat conducting member. The heat conducting member is disposed between the optical module and the lens. The heat conducting member is used for conducting heat from the lens to the optical module.

Abstract: Adjustable mount assembly having two mount parts which are adjustable relative to one another and which themselves form adjustable mounts respectively comprising an outer mount frame and an inner mount frame. The mount assembly permits a highly precise adjustment of two optical components relative to one another in a plane perpendicular to an axis and an adjustment of the two mutually adjusted optical components relative to a reference base.

Abstract: Provided are a lens unit and a vehicle-mounted infrared lens unit capable of correcting a focal shift due to a temperature change without increasing the apparatus size, complicating a production process, and increasing the costs. In a vehicle-mounted infrared lens unit 4 configured such that a plurality of infrared lenses are held by a barrel 30 and a spacer 40 is interposed between two infrared lenses, a first infrared lens 10 is held sandwiched between the spacer 40 and a lens holding portion 31 of the barrel 30. The spacer 40 and the barrel 30 are formed of materials having different thermal expansion coefficients. An O-ring 60 is interposed between a lock portion 32 of the lens holding portion 31 and the first infrared lens 10. Thermal expansion of the spacer 40 allows the first infrared lens 10 to move in the axial direction against the elastic force of the O-ring 60. When the spacer 40 is shrunken, the elastic force of the O-ring 60 allows the first infrared lens 10 to move in the opposite direction.

Abstract: A lens module includes a holder, a connecting loop, engaging pins, an adjustment ring, a fixing pin; and a lens unit. The holder includes a barrel having a receiving space. The barrel defines sliding slots. The adjustment ring defines guiding grooves and a stopping slot. The connecting loop is received in the receiving space, the adjustment ring is sleeved over the barrel, and each engaging pin is secured with the connecting loop, an end of each engaging pin passing through a corresponding sliding slot and into a corresponding guiding groove. The fixing pin passes through the stopping slot and fixed with the barrel, the lens unit is secured with the connecting loop, the adjustment ring is rotated relative to the holder, and the engaging pin slides along the guiding groove, to cause the lens unit to axially move without rotating relative to the holder.

Abstract: An optical system, in particular a projection objective, for microlithography, has an optical axis and at least one optical correction arrangement, which has a first optical correction element and at least one second optical correction element, wherein the first correction element is provided with a first aspherical surface contour, and wherein the second correction element is provided with a second aspherical surface contour, wherein the first surface contour and the second surface contour add up at least approximately to zero, wherein the correction arrangement has at least one drive for movement of at least one of the two correction elements. In this case, at least one of the two correction elements can rotate about a rotation axis which is at least approximately parallel to the optical axis, and the at least one drive is a rotary drive for rotation of one or both of the correction elements about the rotation axis.

Abstract: A holding arrangement for an optical element includes a basic structure surrounding an optical element and a mounting device by which the optical element can be supported on the basic structure with two degrees of freedom for a rotational movement about an optical axis and a translational movement along a first axis which extends perpendicularly to the optical axis and intersects the optical axis in a center. The mounting device includes four joint locations arranged point-symmetrically with respect to the center and at least one parallel rocker which is displaceable parallel to the first axis. A manipulator unit includes a holding arrangement.

Abstract: This image reading apparatus, includes: a first retaining member that retains a lens unit; a second retaining member that retains a sensor unit; and a positioning member that sets a relative position between the first retaining member and the second retaining member, wherein the positioning member comprises: a first concave portion that is sagged from a first contact surface to be in contact with the first retaining member; and a second concave portion that is sagged from a second contact surface to be in contact with the second retaining member, and the positioning member is fixed to the first retaining member and the second retaining member by an adhesive filled in the first concave portion and the second concave portion.

Abstract: A lens-adjusting module includes a base, a lens device, a second tray, and an adjusting device. The lens device includes a first tray and a lens being fixed to and contacting the first tray. The first and the second trays are movably disposed on and contact the base. The first tray is movably disposed on the second tray and located between the second tray and the base. The adjusting device includes a first lever and a second lever pivoted to the base. A part of the first lever and a part of the second lever are slidingly disposed on the first tray. The first lever rotates to drive the first and the second trays to move relatively to the base along a first axis. The second lever rotates to drive the first tray to move relatively to the second tray and the base along a second axis.

Abstract: A lens driving device which can stably support a lead screw, and furthermore, can reduce driving load while maintaining a centering function for stabilizing a lens stop position. The lens driving device comprises a lens for holding member holding a photographic lens, a lead screw for moving the lens holding member forward and backward in a photographic optical axis direction, and a first support member and a second support member for rotationally supporting the lead screw. The second support member has a support concave portion having an apex for supporting the lead screw, and the lead screw has a support portion that is in point contact with the support concave portion having the apex.

Abstract: An SMA actuation apparatus comprises a camera lens element supported on a support structure by a plurality of flexures. An SMA wire at an acute angle to the movement axis and a biasing element are connected between the support structure and the movable element. A component of the force applied by the SMA wire perpendicular to the movement axis compresses the flexures causing them to apply a force to the movable element having a component along the movement axis in the same direction as the SMA wire. An end-stop limits the movement of the movable element, and the moment applied by the end-stop to the movable element about the center of stiffness is equal to the moment applied by the SMA wire about the center of stiffness at the point when the movable element loses contact with the end-stop on contraction of the SMA wire.

Abstract: An adjustable optical mount embodiment includes a first plate configured to mount an optical element and a second plate disposed adjacent the first plate with a pivot point between the plates. At least one adjustable threaded member has a contact end in contact with a rear surface of the first plate and a threaded outer surface in threaded engagement with a threaded bore of the second plate. A lock collar having a threaded bore in threaded engagement with a threaded outer surface of the adjustable threaded member which extends from a rear surface of the second plate has a torqueable surface disposed at an adjustment end which is configured to be engaged for the application of torque from a rearward position relative to the adjustable optical mount.

Abstract: An image pickup apparatus includes a first drive unit, a first lens unit configured to be driven by the first drive unit to perform a magnification-varying operation, a second drive unit, a second lens unit configured to be driven by the second drive unit, and a controller configured to control the first drive unit and the second drive unit so as to drive the second lens unit with reference to a position of the first lens unit in performing the magnification-varying operation. The controller controls the second lens unit so as to move only in a first direction in performing the magnification-varying operation.

Abstract: Disclosed is a piezo-electrically actuated micro-mechanical deformable member comprising a corrugated longitudinal beam (521) formed in a substrate, and having a first anchored end (502) and a second end (509), as well as a plurality of piezoelectric film (PZET) actuating segments (522, 523, 524) formed in or on at least some grooves and ridges of the corrugated beam, the beam (521) being configured to assume one of a number of different geometric configurations depending upon which of a corresponding set of electric actuation signals (105) are applied to the PZET elements, the electric actuation signals establishing corresponding electric fields in the associated PZET segments to thereby deform the member.

Abstract: A lens barrel includes a lens holding member that holds a lens, a positioning guide bar, a rotation blocking guide bar, an optical filter holding member that holds an optical filter, an optical filter supporting member that is disposed at a side of the lens holding member with reference to the optical filter holding member and that supports the optical filter holding member, and an image pickup element holding member that is disposed at a side of an image pickup element with reference to the optical filter holding member and that has a positioning guide bar holding portion that holds the positioning guide bar. The optical filter supporting member includes a rotation blocking guide bar holding portion that holds the rotation blocking guide bar, and the rotation blocking guide bar holding portion is positioned in an insertion and removal range of the optical filter holding member.