Abstract: High-performance and reliable objective lens driving apparatus and optical pickup wherein the tilt of an objective lens relative to an optical disc is suppressed are provided. The optical pickup is equipped with a semiconductor laser, an electro-optic component, and the objective lens driving apparatus. In this optical pickup, the objective lens driving apparatus is comprised of: a moving part including an objective lens, a holder that holds the objective lens, a focusing coil, and a tracking coil; a holding member for elastic support members that couples together multiple elastic support members providing elastic support on a fixed part and the moving part and is mounted on the moving part; the elastic support members that elastically support the moving part from the fixed part; and the fixed part. The holding member for elastic support members mounted on the moving part and the holder that holds the objective lens are joined together by fitting together a concavity and a convexity.

Abstract: Disclosed are a pickup device assembly and an optical drive system. The assembly may comprise: a laser generator for generating laser beams; an objective lens; and at least one piezoelectric actuator for generating bending moments once applied with voltages, wherein the generated bending moments move the objective lens such that the laser beams are focused by the objective lens and then aim at concentric spiral data tracks of a disc with a strongest reflected signal of the laser beams from the disc.

Abstract: In a control device for controlling a variable damper of a vehicle suspension system, when a stroke speed of the damper is within a range including a zero stroke speed, the target damping force is determined as a force opposing a current movement of the damper without regards to the direction of the target damping force determined by a target damping force determining unit. Thereby, even when the wheels move vertically at short intervals, the control value is prevented from changing rapidly, and this allows a damping force of an appropriate level to be achieved in a stable manner at all times. Also, the target damping force when a stroke speed of the damper is within a range including a zero stroke speed may be selected to be a relatively high value or low value so that a desired vehicle behavior may be achieved.

Abstract: A pickup head is provided with a second shaft receiving section. A cutout is formed in the second shaft receiving section. A sub shaft supports the pickup head in a movable manner via the second shaft receiving section. A diameter of the sub shaft is smaller than the size of the cutout. A retainer is attached between the second shaft receiving section and the sub shaft. The retainer includes a body section and a pressing section. The body section enters the cutout in a state that a slide groove of the body section slidably fits to the sub shaft. The pressing section is elastically deformed upon contact with the sub shaft when the body section enters the cutout, and biases the second shaft receiving section via the body section such that a lower surface of the cutout is pressed against the sub shaft.

Abstract: An objective lens actuator in an optical pickup, having a semiconductor laser diode, electro-optic parts, such as a lens or the like, as well as, the objective lens actuator, etc., in a case, comprises: a holder, which mounts an objective lens and a coil thereon, as being a movable part; a magnetic circuit part, which is made up with a magnet for magnetically driving said holder and a yoke; a plural number of elastic support parts which elastically supports said holder; and a support part, which supports other ends of said elastic support parts, wherein said support part has a part, which is cut open in parallel with the elastic support parts, between said elastic support parts, and has a through hole, in which said elastic support part passes through for each of said elastic support parts, and thereby to provide the objective lens actuator for lowering the unwanted vibration mode of the objective lens, and also enabling a stable control thereof.

Abstract: An optical pickup has an objective lens drive device which includes a fixed block fixed to a movement base, a movable block having an objective lens and a lens holder that holds the objective lens, a plurality of support springs that couples the fixed block with the movable block, and a focusing magnetic coil that operates the movable block in a focusing direction. A distance between the fixed block and a recording surface of a disk recording medium is larger than a distance between the movable block and the recording surface. The support springs are inclined with respect to the recording surface. The support springs have a longitudinal direction orthogonal to a direction of a thrust generated at the focusing magnetic circuit to the movable block during a focusing operation.

Abstract: An electron beam apparatus such as a sheet beam based testing apparatus has an electron-optical system for irradiating an object under testing with a primary electron beam from an electron beam source, and projecting an image of a secondary electron beam emitted by the irradiation of the primary electron beam, and a detector for detecting the secondary electron beam image projected by the electron-optical system; specifically, the electron beam apparatus comprises beam generating means 2004 for irradiating an electron beam having a particular width, a primary electron-optical system 2001 for leading the beam to reach the surface of a substrate 2006 under testing, a secondary electron-optical system 2002 for trapping secondary electrons generated from the substrate 2006 and introducing them into an image processing system 2015, a stage 2003 for transportably holding the substrate 2006 with a continuous degree of freedom equal to at least one, a testing chamber for the substrate 2006, a substrate transport mech

Abstract: An actuator for a pickup has a suspension base (500), a lens holder movable in each of a focusing direction along the optical axis of the objective lens and a tracking direction, for holding an objective lens, and six suspensions (550A-550F) each connected at ends thereof to the suspension base (500) and the lens holder. The suspensions (550A-550F) on a side of the suspension base (500) are positioned on a first virtual circle (X), and connection portions on a side of the lens holder (600) are positioned on a second virtual circle (X). Even when the lens holder turns with respect to the suspension base (500), there is generated no relative displacement in an axial direction as a whole because displacements occurring in all the suspensions (550A-550F) are the same.

Abstract: The invention can obtain an excellent linear property in a focusing direction and a tracking direction and can obtain a stable operation, in an objective lens driving means of an optical pickup. In an optical pickup reading and writing an information with respect to an optical disc by using an objective lens, a movable portion mounting the objective lens thereon is supported by a support member constituted by a pair of flexible printed circuit boards respectively curved in opposite directions in a parallel direction to an optical axis of the objective lens so as to be movable with respect to a fixed portion, in both side surfaces of the movable portion facing with holding the objective lens therebetween.

Abstract: A stopper 30 includes a projected portion 35 for restricting movement of a movable section in a focusing direction and a wall section 34 for restricting movement of the movable section in a tracking direction, the projected portion 35 and the wall section 34 being integrally formed from a synthetic resin. With the arrangement, a single stopper 30 can simultaneously restrict the movements of the movable section both in the focusing direction and the tracking direction and determine its movable ranges. Accordingly, unlike conventional arrangements, discrete stoppers for the focusing direction and the tracking direction do not have to be provided, thereby reducing the number of components and cost as well as facilitating mounting operation. In addition, even when a strong impact is applied, the stopper will not be deformed.

Abstract: An optical pickup actuator for driving, by a magnetic driving unit, in a focusing direction, a tracking direction, and a tilting direction, a bobbin on which an objective lens is disposed and which is movably supported by suspension wires, including at least one damping member is disposed at a position where greatest changes in the optical pickup actuator occur when driving the bobbin in the focusing direction, the tracking direction, and the tilting direction, so that a size of a second resonant peak is reduced.

Abstract: An actuator of an optical pick-up device includes two fixing frames, a lens holder disposed between the fixing frames and provided with a focus lens and coils, springs supporting the lens holder, the springs connecting two points of each fixing frame to the lens holder, each spring having one or more bends, a permanent magnet disposed facing the coils to generate magnetic field, and a yoke forming a path of the magnetic field generated by the permanent magnet.

Abstract: An optical head device comprises a lens holder in which an objective lens and drive coils are mounted and a plurality of elastic support members which support the lens holder to move in a focusing direction and a tracking direction. The lens holder has a coil holding portion for holding the drive coils and a lens holding portion which projects from the coil holding portion to the front to hold the objective lens. The lens holding portion is formed thinner than the coil holding portion to avoid interference with a deflecting element positioned beneath the lens holding portion. The lens holding portion has a flat surface with an arc shape from the side portion to the front along the outer circumference of the objective lens. The lens holding portion also has a first vibration-absorbing member attached to the front end portion thereof.

Abstract: An optical pickup actuator reducing an access time to a disc, and an optical recording and/or reproducing apparatus using the same. The optical pickup actuator includes a base, a wire holder on one side of the base, a bobbin on which an objective lens is placed, first and second yokes, suspension wires, and a magnetic driving unit for driving the bobbin in focusing and tracking direction. The first yoke is between one side of the bobbin and the wire holder, and the second yoke is on the other side of the bobbin. A damping member is inserted into the first yoke. One end of each of the suspension wires is fixed to the wire holder, and the other end movably supports the bobbin. Accordingly, an access time, an important performance characteristic in a high-speed optical recording and/or reproducing apparatus is reduced due to an improvement of a damping effect.

Abstract: An optical pickup device includes a lens for projecting a light onto a recording medium, a lens holder elastically supported by a frame and holding said lens, an actuator mounted in and driving said lens holder, and a weight part balanced with a weight of said actuator.

Abstract: Suspension wires (3a) and (3c) are fixed to and bridged over a lens holder (1) and a fixing member (11) which is fixed to the housing. On each of side surfaces of the lens holder (1) is mounted a tilt bobbin (8) onto which a tilt coil (9) is wound. A second suspension wire (3b) is fixed to and bridged over the tilt bobbin (8) and the fixing member (11).

Abstract: An optical pick-up device includes a lens that focuses light onto a recording medium, a lens holder that holds the lens, a suspension holder that supports the lens holder disposed opposite a distal end of the lens holder, a frame formed so as to be disposed opposite both lateral surfaces of the lens holder and the distal end of the lens holder, the frame supporting the suspension holder, a plurality of elastic supports that movably support the lens holder, a distal end of the elastic supports mounted on the suspension holder, and an actuator that drives the lens holder, wherein a plurality of projections is provided on at least one of the lens holder, the frame and the suspension holder, the projections acting as stoppers that restrict a rotation of the lens holder so as to prevent excessive deformation of the elastic supports.

Abstract: In an optical pickup including a supporting member for movably supporting a lens holder through a plurality of linear spring members, a holding member is provided between the lens holder and the supporting member and having holes for accommodating a plurality of linear spring members, and a damper gel is filled in the holes in the holding member for damping deflection of the linear spring member. Gaps are formed between the edge defining an opening of the hole on the holding member opened toward the supporting member and the supporting member, and the damper gel is not filled around the linear spring member at the closest position with respect to the optical disk but is filled around other linear spring members. Accordingly, when wiping off dirt attached to the objective lens, the damper gel is prevented from attaching on projections of the cleaner even when the projections pass through the gap formed between the holding member and the supporting member.

Abstract: An optical pickup actuator reducing an access time to a disc, and an optical recording and/or reproducing apparatus using the same. The optical pickup actuator includes a base, a wire holder on one side of the base, a bobbin on which an objective lens is placed, first and second yokes, suspension wires, and a magnetic driving unit for driving the bobbin in focusing and tracking direction. The first yoke is between one side of the bobbin and the wire holder, and the second yoke is on the other side of the bobbin. A damping member is inserted into the first yoke. One end of each of the suspension wires is fixed to the wire holder, and the other end movably supports the bobbin. Accordingly, an access time, an important performance characteristic in a high-speed optical recording and/or reproducing apparatus is reduced due to an improvement of a damping effect.

Abstract: An optical pickup actuator for driving, by a magnetic driving unit, in a focusing direction, a tracking direction, and a tilting direction, a bobbin on which an objective lens is disposed and which is movably supported by suspension wires, including at least one damping member is disposed at a position where greatest changes in the optical pickup actuator occur when driving the bobbin in the focusing direction, the tracking direction, and the tilting direction, so that a size of a second resonant peak is reduced.