Abstract: Provided is a lens barrel, which can be further reduced by providing such a first helicoid as can be easily manufactured even in the zone of a small lead. The lens barrel (1) comprises a first barrel member (6) having a first helicoid (18, 25 and 26) formed in a first face (6a), and a second barrel member (21) having a second helicoid (24) formed in a second face (21a) confronting the first face (6a). The lens barrel is characterized in that the first barrel member (6) has, in the first face (6a), a first zone (Z1), in which the first helicoid (18, 25 and 26) has a first lead, and a second zone (Z2 and Z3), in which the first helicoid (18 and 25) has a second lead smaller than the first lead, and in that the first helicoid (18 and 25) having the second lead has a smaller thread number than that of the first helicoid (18, 25 and 26) having the first lead.

Abstract: A lens module includes a lens barrel and a lens holder. The lens barrel includes a barrel. The barrel includes an outer surface and an outer thread portion formed on the outer surface. The lens holder includes a main body. The main body defines a receiving space to receive the lens barrel. An inner thread portion matching the outer thread portion is formed on an inner surface of the receiving space. The angle between the outer surface of the lens barrel and an optical axis of the lens module is different from the angle between the inner surface of the receiving space and the optical axis of the lens module.

Abstract: Provided is a lens barrel comprising: an optical system including an optical component that moves relative to a fixed cylinder; a holding frame that holds the optical component; a guide axle that is connected to the holding frame and that extends in a direction parallel to an optical axis of the optical system; a scaling drive unit that can move relative to the fixed cylinder and that moves the holding frame in the direction of the optical axis when the optical system scales; and a focusing drive unit that has at least a portion thereof fixed to the fixed cylinder and that moves the guide axle in the direction of the optical axis while facing at least a portion of the guide axle.

Abstract: An exemplary lens module includes a lens barrel, a first lens, and a second lens. The lens barrel includes an accommodating cavity defined therein. The first lens is received in the accommodating cavity of the lens barrel. The first lens has a first adjusting notch defined at a periphery thereof. The second lens is received in the accommodating cavity of the lens barrel and adjacent to the first lens. The second lens has a second adjusting notch defined at a periphery thereof. The second adjusting notch communicates with the first adjusting notch.

Abstract: A lens barrel unit including a lens barrel which has a plurality of lens groups and is set to a photographing state by moving at least a part of the lens groups to an object side and to a collapsed state by moving the at least the part of the lens groups to an image plane side and storing the lens groups, the lens barrel unit includes: a first supporting frame which retains at least one lens group of the lens groups; a second supporting frame which retains the first supporting frame movably in an optical axis direction of the lens barrel; a first supporting frame moving section which moves the first supporting frame in the optical axis direction of the lens barrel; and a fixed cylinder in which a main shaft which is capable of moving the second supporting frame in the optical axis direction of the lens barrel is provided.

Abstract: A lens barrel includes at least two cam tubes, and an operation based on the rotation of an operation ring actuates the two cam tubes to move a lens group. The lens barrel includes a first cam tube that drives part of the lens group in response to an operation based on the rotation of the operation ring, and a second cam tube that moves part of the lens group in the optical axis direction in response to the operation based on the rotation of the operation ring. The second cam tube rotates at a speed different from that of the first cam tube.

Abstract: A lens barrel includes a driven ring, a follower provided on the driven ring, a rotational transfer ring including a circumferential groove having no axial-direction component and a rotational transfer groove including an axial-direction component, a guide ring, and a cam groove formed on the guide ring for guiding the driven ring via the follower. Rotation of the driven ring is prevented when the follower is engaged in the circumferential groove so that the driven ring is held at a non-photographing position. When the follower is engaged in the rotational transfer groove, the driven ring is moved along the cam groove between the non-photographing position and a ready-to-photograph position. Opposed wall surfaces in the circumferential groove determine a position of the follower when the driven ring moves between the non-photographing position and the ready-to-photograph position.

Abstract: The lens barrel includes a first lens unit, a second lens unit, and a drive unit. The first lens unit includes a first lens element and a first lens support frame supporting the first lens element. The second lens unit includes a second lens element and a second lens support frame supporting the second lens element. The second lens unit is supported by the first lens unit to be movable in the optical axis direction of the first lens element with respect to the first lens unit. The drive unit is arranged to be used to drive the second lens unit with respect to the first lens unit, and is fixed to the first lens unit. When viewed in the optical axis direction, the drive unit is fixed to the first lens unit so that a first profile line formed by the first lens unit and the drive unit is substantially circular.

Abstract: A liquid crystal lens includes a first light-pervious plate, a second light-pervious plate opposite to the first light-pervious plate, a liquid crystal layer sandwiched between the first light-pervious plate and the second light-pervious plate, a first electrode layer, a second electrode layer and a driving voltage chip. The first electrode layer includes a plurality of concentric, annular electrodes arranged on a surface of the first light-pervious plate. A material of the first electrode layer is carbon nanotube. The second electrode layer is arranged on a surface of the second light-pervious plate. The driving voltage chip is configured for providing voltages between each of the annular electrodes and the second electrode layer in radial gradient distribution. A lens module is also provided in the present invention.

Abstract: At least one object of the present invention is to provide a lens barrel, including: a fixed frame (21) having a fixed cylinder (21); a telescopic cylinder (22, 23, 24, etc.) configured to be accommodated within the fixed cylinder (21); a plurality of lens groups (11, 12) configured to be retained in the telescopic cylinder; a lens driving device (51, 52, etc.) configured to drive the plurality of lens groups along a optical axis of the telescopic cylinder between a collapsed position and an extended position; and two retractable lens groups (13, 14) configured to be retracted into the telescopic cylinder when the telescopic cylinder is in the extended position and configured to be retracted out of the telescopic cylinder when the telescopic cylinder is in the collapsed position.

Abstract: A barrel includes a through-hole through which an interlocking lever passes, the interlocking lever provided on a barrier drive member to receive a rotational force. The barrier drive member includes a flange portion in a circumferential direction. The flange portion is positioned at the same phase as the interlocking lever and covers the through-hole from an optical axis direction during a rotation of the barrier blades from an open state to a closed state.

Abstract: Miniature telescopes of both Galilean and astronomical design are fashioned to allow bi-level viewing, simultaneously, of both magnified scope images and non magnified normal images of both far and near objects or areas. Improvements in bi-leveling telescopes involve: objective lens aspherics, ocular lens materials of high refractive indices, anti-reflective fabric like materials for internal light control. This combination of innovations results in a bi-levelable miniature telemicroscope displaying wider magnified fields which display brighter and clearer imagery. Peripheral chromatic and spherical aberrations are considerably reduced even in shorter length telescope units. These shorter length scopes are spectacle mounted in such a way that the front surface of a spectacle carrier lens is coplanar with the telescope objective lens. Tintings and other coatings can now be applied to any of the scope's lenses or internal disks as well as to spectacle carrier lenses.

Abstract: The lens apparatus includes a guide barrel including a guide groove portion penetrating through a circumferential wall of the guide barrel, and a cam barrel disposed rotatably and including a penetrating cam groove portion penetrating through a circumferential wall of the cam barrel and a non-penetrating cam groove portion not penetrating therethrough. The apparatus further includes a first holding member holding a first optical element and moved in an optical axis direction by the guide groove portion and the penetrating cam groove portion with rotation of the cam barrel, a second holding member holding a second optical element and moved in the optical axis direction by the guide groove portion and the non-penetrating cam groove portion with the rotation of the cam barrel, and an adjusting mechanism used for adjusting a position of one of the first and second optical elements relative to that of the other.

Abstract: A light shielding structure of an optical device includes outer and inner annular members which move relative to each other in an axial direction, small and large diameter outer peripheral portions formed on the inner annular member, and a light shielding ring positioned inside the outer annular member and supported thereby. The light shielding ring does not contact the small-diameter outer peripheral portion of the inner annular member. The light shielding ring and the large-diameter outer peripheral portion of the inner annular member coincide with each other in the axial direction in an operating state of the optical device whereby a clearance between the outer annular member and the inner annular member is made light-tight. The light shielding ring and the small-diameter outer peripheral portion of the inner annular member coincide with each other in the axial direction in a non-operating state of the optical device.

Abstract: A lens barrel includes a barrel main body, a first lens movement frame, a magnetic scale, and a magnetic sensor. The first lens movement frame is arranged movably in the optical axis direction of the optical system with respect to the barrel main body. The magnetic scale is provided to the first lens movement frame. The magnetic sensor is arranged on the outside of the barrel main body, and detects the position of the first lens movement frame with respect to the barrel main body by detecting the position of the magnetic scale with respect to the barrel main body.

Abstract: A lens device includes a seat unit having an image sensing component, a first barrel unit, a first lens module coupled to the first barrel unit, and a second lens module mounted on the seat unit. When the first barrel unit moves toward the seat unit along an optical axis, the first lens module moves in radial directions via a first guide mechanism such that a first lens unit is misaligned with the image sensing component relative to the optical axis, while the second lens module is driven to rotate via a second guide mechanism such that a second lens unit is misaligned with the image sensing component. The lens device further includes a first biasing unit for biasing the first lens module to a first shooting position, and a second biasing unit for biasing the second lens module to a second shooting position.

Abstract: A lens driver unit includes a plurality of lens groups including a first lens group and a second lens group, a first lens frame with first and second engaging portions, a second lens frame with a third engaging portion to engage with the first engaging portion, a lens barrel, a first guide element, a second guide element, at least one third guide element, an engaging element, and a drive unit. In an imaging position in which all of the lens groups including the first and second lens groups are placed on an optical axis, the first lens frame is integrally moved with the second lens frame along the optical axis by engagement of the first and third engaging portions while in a contained position, the first lens frame is rotated in a predetermined direction to retreat the first lens group outside an inner diameter of the lens barrel.

Abstract: An internal focusing zoom lens includes a stationary barrel including a focus-guide cam groove; a zoom cam ring including a focus-shift cam groove and rotated about an optical axis during zooming; a focus cam ring including a focus cam groove and rotated about the optical axis and moved in the optical axis direction to move a focusing lens group during focusing; and a focus correction ring for moving the focus cam ring in the optical axis direction by rotation of the zoom cam ring. The focus correction ring includes a focus correction cam-follower engaged in the focus-shift cam groove, the focus cam groove and the focus-guide cam groove. A position of the focus correction cam-follower in the focus cam groove changes via the focus-shift cam groove and the focus-guide cam groove in accordance with the rotation of the zoom cam ring during zooming.

Abstract: The positioning of the first through the third lenses in the optical axis direction is performed in the state that the optical axes are aligned by press-fitting the outer circumference surfaces of the first through the third lenses of the second lens group respectively to the first through the third lens holding portions of the lens frame and the state that the first reference plane of the first lens and the second reference plane of the second lens are contacted and the third reference plane of the second lens and the fourth reference plane of the third lens are contacted.

Abstract: An exemplary lens barrel includes an accommodating member having a cylinder, a lens barrel, a holder for fixing the accommodating member, and a resilient member. The cylinder has a plurality of stepwise slits each having an end exposed at an underside surface thereof. The lens barrel has a plurality of restricting elements extending from an outer surface thereof. The lens barrel is coaxially accommodated in the cylinder with the restricting element passing through a corresponding slit. The resilient member is sandwiched between the lens barrel and the holder, capable of changing its length under an external force, such that a focal length of the lens module is adjustable when the restricting elements move in and along the slits.

Abstract: An adjustable lens mounting assembly has a detent system which provides a defined vertical movement of a lens per detent index. A calibration of a lens during assembly of an image sensor is therefore achieved with no moving parts, and generation of foreign material is minimized. Furthermore, gluing of the components can be dispensed with.

Abstract: The present invention aims to provide an imaging device and a camera realizing simultaneously a high magnification zoom lens system and the miniaturization of the device. The imaging device (2) includes a first lens group (G1), a second group frame unit (42), a first group frame unit (41), a motor unit (32), a third lens group (G3), and a CCD unit (33). The first lens group (G1) takes in a light flux incident along a first optical axis (A1). The second group frame unit (42) bends the light flux incident along the first optical axis (A1) to a direction along a second optical axis (A2). The first group frame unit (41) retains the first lens group (G1), and moves the first lens group (G1) in the direction along the first optical axis (A1). The motor unit (32) drives the first group frame unit (41).

Abstract: An optical element position control mechanism includes an optical element holding member, a lead screw rotatable on a rotational axis parallel to movement direction of the optical element holding member, a linearly moving nut screw-engaged with the lead screw and engaged with the optical element holding member, and a rotation prevention device preventing the linearly moving nut from rotating about the lead screw. Rotations of the lead screw cause the linearly moving nut to move along the lead screw, a position of the optical element holding member being determined by the linearly moving nut. A biasing device is positioned between the linearly moving nut and the optical element holding member and is resiliently deformable in a plane substantially parallel to a plane which includes the rotational axis of the lead screw, and applies a biasing force against the linearly moving nut so as to be prevented from rotating.

Abstract: A zoom lens assembly and zoom lens module are provided, including a first lens, a second lens, a plurality of guiding blocks, a sheathing tube, a plurality of linking members and an adjusting tube. The first lens includes a plurality of curved surfaces disposed on a second lens surface toward a first lens surface. The second lens includes a plurality of driving rods disposed on a third lens surface and abutting the curved surfaces. The guiding blocks are respectively fixed on the first lens. The sheathing tube sheathes the first lens and the second lens and comprises a plurality of guiding notches to receive the guiding blocks, and a plurality of slits. The linking members pass through the slits and are fixed on the second lens. The adjusting tube sheathes the sheathing tube and comprises a plurality of driving notches to receive the linking members.

Abstract: A zoom lens device is reduced in size and capable of zoom operation with the number of steps large enough to display the value as a zoom lens. The zoom lens device comprises lens system (A) with a first lens group, a second lens group, and a third lens group arranged on optical axis (Z). It comprises zoom mechanism (E) for changing the focal distance of lens system (A) by changing the second lens group in the direction of optical axis (Z). It comprises focus mechanism (C) for adjusting the image forming position of lens system (A) by moving the third lens group13 in the same direction as optical axis (Z). It also comprises driving force transmitting section (B) for transmitting the driving force from the motor to zoom mechanism (E) and focus mechanism (C). Driving force transmitting section (B) includes stopwork (D) like Geneva drive (F) for intermittently transfer the driving force from the driving source to zoom mechanism (E).

Abstract: A modular focus system for image based code readers includes swappable lens attachments enables fixed focus, manual focus, and variable focus operation from a single reader. A manual focus lens cap includes a manually adjustable focus ring to change the focus of the reader. A variable focus lens module includes a liquid lens that is manipulated by a voltage delivered via a pair of electrodes to adjust the focus of the reader. The lens attachments can be swapped out and replaced as needed.

Abstract: Provided is a lens barrel including: a guide shaft in an axial form supported by a reference member; a holding member holding an optical system, and movable in an axial direction of the guide shaft with respect to the reference member; and an interlocking member including an engaging section engaging with the holding member, the interlocking member moving in the axial direction while rotating around an optical axis of the optical system, and moving along the guide shaft without rotating the holding member. The lens barrel may include a driving cylinder including a cam groove engaging with the interlocking member, where when rotated around the optical axis, the driving cylinder drives the interlocking member by means of the cam groove, to cause the interlocking member to move linearly in the direction of the guide shaft.

Abstract: An exemplary lens module includes a number of optical components, a barrel, a holder, a filter base, a filter carrying member, an infrared-cut filter and a visible-light-cut filter. The barrel is configured for receiving the optical components therein. The holder holds the barrel therein. The filter base is disposed in the barrel. The filter carrying member is movably mounted on the filter base. The infrared-cut filter and the visible-light-cut filter are mounted on the filter carrying member. The filter carrying member is movable relative to the filter base so as to selectively bring either the infrared-cut filter or the visible-light-cut filter into optical alignment with the optical components in the barrel. The lens module can be capable of performing infrared and visible-spectrum photography.

Abstract: An apparatus for checking concentricity between a barrel holder and a lens barrel rotatably engaging with the barrel holder is provided. The lens barrel includes at least one lens coaxially received therein. The apparatus includes a barrel holder retaining member, a rotating member, a driving unit, a light source, and an image sensor. The barrel holder retaining member is used for fixedly retaining the barrel holder in position. The rotating member is structured for meshing with the lens barrel. The driving unit is used for driving the rotating member to rotate, thereby rotates the lens barrel. The light source is configured for emitting light toward a first end of the lens barrel. The image sensor is arranged to face toward an opposite second end of the lens barrel. The image sensor is configured for sensing the light emitted from the light source.

Abstract: A lens drive device may include a movable body, a support body supporting the movable body through a spring member, and a magnetic drive mechanism provided with a coil. The movable body includes a coil winding part, end parts for restricting a range of the coil winding part, and a changing part for changing a drawing direction of the coil. The spring member is disposed near the other end part of the movable body and electrically connected with winding start and winding end of the coil. A coil winding method for the lens drive device may include a drawing step in which a coil is drawn between end parts, a changing step in which a drawing direction of the coil is changed by the changing part, and a winding step in which the coil is wound around the coil winding part.

Abstract: A lens barrel is provided. The lens barrel includes a first cylinder that includes at least one continuous groove on an interior surface thereof. The at least one continuous groove includes a trough of a helicoidal screw and a circumferential groove formed in a circumferential direction with respect to the first cylinder and formed in continuation with the trough of the helicoidal screw. The lens barrel also includes a second cylinder that includes a crest of a helicoidal screw that engages with the trough of the helicoidal screw and the circumferential groove and that is formed on outer circumference of the second cylinder. The crest of the helicoidal screw is formed of first material. A part of the crest of the helicoidal screw includes a reinforcement structure formed of a second material that is a different material from the first material.

Abstract: A lens module structure with a metal shell includes a metal shell and a lens module. The metal shell has a bottom casing and a top casing. The bottom casing has several lateral plates which have protrusions inwardly. At least two lateral plates have first locking portions. Second locking portions corresponding to the first locking portions are disposed on the side wall of the top casing. The lens module has metal portions and is assembled with the bottom casing. Each of the protrusions on the bottom casing abuts and holds the metal portions. Furthermore, the top casing is assembled with the bottom casing via locking the second locking portions with the first locking portions. The protrusions have a predetermined length. The protrusions can abut and hold the lens module with a predetermined size. Moreover, the effect of anti-electromagnetic interference is improved.

Abstract: The lens barrel includes a first lens unit, a second lens unit, and a drive unit. The first lens unit includes a first lens element and a first lens support frame supporting the first lens element. The second lens unit includes a second lens element and a second lens support frame supporting the second lens element. The second lens unit is supported by the first lens unit to be movable in the optical axis direction of the first lens element with respect to the first lens unit. The drive unit is arranged to be used to drive the second lens unit with respect to the first lens unit, and is fixed to the first lens unit. When viewed in the optical axis direction, the drive unit is fixed to the first lens unit so that a first profile line formed by the first lens unit and the drive unit is substantially circular.

Abstract: A barrel for an electrically-controllable variable focal length lens in a button-battery type housing includes a hollow isolating cylindrical tube with an inner diameter substantially equal to that of the lens housing, with one or bumps extending radially towards the inside of the tube and forming bearing surfaces for the lens periphery in a same radial plane. First metallizations extend on at least one of the bearing surfaces and therefrom into first channels formed in the internal wall of the tube towards at least one end of the tube, and second metallizations, each of which forms a contact area on the internal surface of the tube to bear against the lateral surface of the lens and extends towards at least one end of the cylinder.

Abstract: A lens barrel device that includes optical parts holding frames, which hold optical parts so that the optical parts holding frames can linearly move in the optical axis directions, respectively, and an image capture device.

Abstract: To provide a lens barrel having an improved assembly accuracy. The lens barrel is provided with: a stationary part; a movable part provided movably relative to the stationary part, its movement moving a lens relative to the stationary part; a rotary member to transfer to the movable part a driving force for moving the movable part relative to the stationary part; and a supporting part provided integrally with the stationary part to support a rotary axis of the rotary member.

Abstract: A lens barrel assembly of a camera module and a laser apparatus for assembling the lens barrel assembly are provided. The lens barrel assembly of a camera module includes: at least one lens; a barrel provided with a lens exposing hole having a predetermined size which is formed to penetrate a central portion of a closed upper surface of the barrel, wherein the lens is inserted from an lower opening of the barrel toward the lens exposing hole; and a stopping protrusion which is formed by fuse-securing a fused material on a boundary region between an outer circumference of the lens and an opened inner surface of the barrel by illumination of a laser beam on the opened inner surface of the barrel.

Abstract: There is provided a lens barrel and the like, which permits downsizing along the optical axis direction and in which the slide resistance is reduced. A lens barrel (110) includes a holder (13), a lens frame (15), and an elastic member (21). The holder includes a first guide axis (19) and a second guide axis (20). The lens frame includes a first guide section (50, 53) which is movably fitted around the first guide axis and a second guide section (51) which is movably fitted around the second guide axis, and retains at least one lens (17). The elastic member exerts an energizing force on the second guide section and is disposed between the holder and the second guide section. The lens frame moves along the optical axis direction of the lens as the first guide section is guided by the first guide axis. The elastic member energizes the lens frame along the optical axis direction of the lens by exerting an energizing force on the second guide section.

Abstract: A lens apparatus and image pickup apparatus thereof. The lens apparatus includes a first fixed lens-barrel with fixed-side first guide grooves and fixed-side second guide grooves, a first movable lens-barrel arranged at the outside of the fixed lens-barrel, movable-side first guide grooves, a second movable lens-barrel arranged at the inside of the fixed lens barrel, and movable-side guide grooves. Three first rolling element units are provided between the fixed-side guide grooves and the movable-side first guide grooves, and three second rolling element units are provided between the fixed-side second guide grooves and the movable-side second guide grooves. The first movable lens-barrels and the second movable lens-barrels are supported to the one-group lens and the two-group lens in such a manner that they can be independently moved in the optical axis directions of the first and second lenses.

Abstract: A lens barrel is provided with: a first movable frame and a second movable frame of a plurality of movable frames that are coaxially disposed to be movable back and forth to a stationary main frame and are inserted telescopically into the stationary frame; and two U-shaped support and drive members each having a first engagement portion, wherein each of the support and drive members is constituted of two arm portions, a second engagement portion, and a coupling member which connects the two arm portions. The first movable frame is driven by one of the support and drive members, and the second movable frame and the first movable frame are engaged with each other.

Abstract: A lens barrel includes a focus cam ring that holds a focus lens group and moves in the optical axis direction of the focus lens group while rotating along a cam groove in response to a focusing operation, and a fixed tube having a fitting raised portion that can pivot the focus cam ring in the rotational direction thereof and movably supports the focus cam ring in the optical axis direction. The focus cam ring has a position restrictor that can engage the fitting raised portion, and the position restrictor includes a rotational-direction restrictor that restricts the position of the focus cam ring in the rotational direction and an optical axis-direction restrictor that restricts the position of the focus cam ring in the optical axis direction.

Abstract: A lens barrel is provided and includes: a lens barrel main body; and a connecting member attached to the barrel main body and connected to a camera. The connecting member includes an optical filter unit, divided at a position of the optical filter unit and is constituted by a barrel side member and a camera side member.

Abstract: A lens barrel including a first moving lens group for advancing light of a subject onto an image plane, a second moving lens group for advancing light of the subject onto the image plane, a shaft section for guiding the first moving lens group and the second moving lens group in a direction of an optical axis, an intermediate positioning section for supporting the shaft section at an intermediate portion of the shaft section, and an end positioning section for supporting one end of the shaft section, wherein the first moving lens group slides on a portion of the shaft section that is closer to the subject than the intermediate positioning section is, and wherein the second moving lens group slides on a portion of the shaft section that is closer to the image plane than the intermediate positioning section is.

Abstract: A lens unit includes a lens barrel (7) with a through hole (6), a first lens (8a) press-fitted into the through-hole (6), a first step (9a) catching an outer edge of the first lens (8a) in the through-hole (6), a second lens (8b) press-fitted into the through-hole (6) in a direction of an optical axis of the first lens (8a), and a second step (9b) catching an outer edge of the second lens (8b) in the through-hole (6). The second lens (8b) has a diameter larger than that of the first lens (8a). A third step (10a) or a sloped portion broadening the through hole from the first lens to the second lens is further provided.

Abstract: The rear projection lens device comprises a fixed lens barrel, a first lens barrel having a front lens group, a second lens barrel having a rear lens group, and a rotation stopper. The first lens barrel is helicoid-coupled with the fixed lens barrel, and moves in an optical axial direction by rotating relative to the fixed lens barrel. The second lens barrel is helicoid-coupled with the first lens barrel and moves in the optical axial direction so as to change an interval between the front lens group and the rear lens group when the first lens barrel rotates. The rotation stopper allows the second lens barrel to move in the optical axial direction, but stops the rotation around the optical axis. A zoom adjustment and aberration correction associated with the zoom adjustment are conducted concurrently only by rotating the first lens barrel.

Abstract: A lens actuator includes a lens barrel for accommodating the lens, a coil warped around the lens barrel, a plurality of magnets, a bracket for mounting the magnets thereon and accommodating the lens barrel therein, and a resilient plate connected between the bracket and the lens barrel to hold the lens barrel on the bracket. The resilient plate includes a plate shaped body, a through hole defined in the center of the plate shaped body, a plurality of slots defined in the plate shaped body and the slots cooperatively surrounding the through hole, and a plurality of fixing portions. A first pinhole defined in each of the fixing portions. The lens barrel comprises a plurality of first positioning pins corresponding to the first pinholes and protruded out from the lens barrel, and the resilient plate is fastened to the lens barrel by engagement of the first pinholes with the respective first positioning pins.

Abstract: On an outer peripheral portion of an adjusting lens holder (11), a ring-shaped first protrusion (12) is arranged to protrude to a housing (3). On an inner peripheral portion of the housing (3), a ring-shaped second protrusion (13) is arranged to protrude to the adjustment lens holder (11). The first protrusion (12) is arranged outside the second protrusion (13), an interval (B) between the both protrusions (12, 13) is smaller than a clearance (A) between the adjustment lens holder (11) and the housing (3), and the height of the first protrusion (12) is lower than that of the second protrusion (13). The minimum value of the clearance (A) is “A?B” and a space is provided between the first protrusion (12) adjacent to the clearance (A) and the housing (3). Thus, an adhesive is prevented from leaking out at the time of applying the adhesive in the clearance (A), and the space is filled with the adhesive.

Abstract: The present invention provides an optical option attachment ring comprising: a ring body into which a lens barrel is inserted; a clamping ring rotatably fastened on the periphery of the ring body; an elastic member arranged between the ring body and the clamping ring; and an abutting portion which is provided on the clamping ring and abuts on the elastic member according to the rotational position of the clamping ring to elastically deform the elastic member to cause at least a part of the elastic member to project further inwards than the inner peripheral surface of the ring body and to be positioned in a groove formed in the lens barrel.

Abstract: A focusing device (100) includes a lens mount (10), a driving mechanism (30), a hollow first barrel (50) and a first lens element (60) received in the first barrel. The lens mount includes a hollow sleeve (13) which includes a wall, a first internal thread on an inside of the wall and a cutout (134) defined through the wall. The hollow first barrel includes a wall, and a first outer thread (571) and an annular gear (55) on an outside of the wall. The first barrel is movably secured in the lens mount by means of the first outer thread engaging with the first internal thread, the driving mechanism protrudes through the cutout of the lens mount to drive the annular gear to rotate in the lens mount so that the first barrel ascends or descends relative to the lens mount.

Abstract: The present invention provides a method for fabricating a lens unit in which an inter-barrel member can be fixed with a high degree of accuracy without enlarging the lens barrels and the accuracy of the dimension of the inter-barrel member is not required. The method comprises the steps of: disposing an inter-barrel member 11 in a gap “g” defined between a front lens barrel 7 on a subject side in an optical-axis direction x and a rear lens barrel 8 on an imaging surface side in the optical-axis direction x; bringing the inter-barrel member 11 into close contact with one of the front lens barrel 7 and the rear lens barrel 8 in the optical-axis direction x; inserting a resilient member 12 into a space in the optical-axis direction x between the inter-barrel member 11 and the other of the front lens barrel 7 and the rear lens barrel 8; and fixing the front lens barrel 7 and the rear lens barrel 8 integrally with each other to compress the resilient member 12 in the optical-axis direction x.