Abstract: There is described a lens barrel including; a plurality of lens units; an actuator to move at least a lens unit included in the plurality of lens units; and a housing member. The actuator includes: a vibrating device constituted by two vibrating members, each of which includes piezoelectric elements aligned in a line, so that the two vibrating members intersect each other at a predetermined angle and vibrate in response to high-frequency electric signals; a driven member, coupled to the lens unit, to be moved by vibrations generated by the vibrating device; and a supporting member that is rotatably mounted on a shaft disposed opposite to the vibrating device in such a manner that the vibrating device press-contacts the driven member. The driven member is disposed at a side of the lens unit, while the vibrating device and the supporting member are disposed at a side of the housing member.

Abstract: An image entering from the left side of the figure passes through a correcting lens unit, and forms an image on an image pickup device on the right side of the figure. The correcting lens unit includes a cylindrical outer frame and a lens arranged therein, and at coupling points, coupled to one end of each of electrostrictive coils and suspended thereby. Electrostrictive coils strain in response to voltages applied from a voltage applying unit, causing displacement of electrostrictive coils. The displacement is transmitted to correcting lens unit through the coupling points, and therefore, in accordance with the displacement from electrostrictive coils, position and/or direction of correcting lens unit changes.

Abstract: A lens holder is so supported that the lens holder is movable along a supporting shaft in parallel to an optical axis of the object lens, and rotatable about the supporting shaft. Magnets are mounted on the lens holder. Focusing coils and tracking coils having sides facing the magnets are mounted on a base on which the supporting shaft is planted. Yokes are so provided that the yokes and the magnets respectively sandwich the focusing coils and the tracking coils. The yokes have facing portions that face respective magnetic poles of the magnets and extending portions extending in the directions away from the magnets.

Abstract: A lens moving mechanism which includes a moving lens for zooming or focusing; a lens holder holding the moving lens in a lens-barrel, and being supported freely movably into an optical axis direction of the moving lens; a guide shaft guiding the lens holder into the optical axis direction of the moving lens when the lens holder moves; a drive magnet attached to the lens holder; a drive coil fixed to the lens-barrel with at least part of the drive coil opposed to the drive magnet and giving an impelling force into the optical axis direction to the lens holder by being electrified; and a magnetic body fixed to the lens-barrel and located to oppose to the drive magnet on an opposite side of the drive magnet with at least a part of the drive coil put between the magnetic body and the drive magnet, and attracting the drive magnet.

Abstract: A laser cutting system, including a steering mirror assembly for directing a laser beam through a predetermined cutting path along a workpiece or substrate material. The steering mirror assembly includes a base, and a mirror pivotally supported on the base by a flexure assembly which confines pivotal movement of the mirror about a vertical Y-axis and/or about a horizontal X-axis. A pair of electrical actuator assemblies include movable bobbin assemblies connected to the mirror by control rod flexures at locations on the mirror which are spaced 90° apart from one another. In operation, selective electrical energization of the actuator assemblies controls movement of the bobbin assemblies to pivot the mirror about the vertical Y-axis and/or about the horizontal X-axis throughout a number of angular orientations to thereby direct the laser beam through a predetermined cutting operation pattern along the substrate surface to cut materials from the substrate.

Abstract: An autofocus actuator is provided by which it is possible to easily confirm that a holder and a yoke do not make contact with each other even when the space between the holder and the yoke is made as small as possible in order to improve shock resistance. The autofocus actuator includes light transmission holes for confirming a space between an inner peripheral surface of an inner cylindrical portion of the yoke and an outer peripheral surface of a cylindrical portion of the holder provided with a lens unit and being capable of adjusting its position in the optical axis direction by supplying electrical power to a coil secured to the holder. The light transmission holes are provided at predetermined positions of a flange portion of the holder and a stopper for attaching a leaf spring to the holder, respectively, so that light can pass therethrough.

Abstract: An imaging device comprises a first lens unit and a second lens unit. A first fixed barrel of the first lens unit movably holds a first lens frame, which holds a first lens group, in an optical-axis direction. A second fixed barrel of the second lens unit movably holds a second lens frame, which holds a second lens group, in the optical-axis direction. The first and second fixed barrels are secured in series in the optical-axis direction. The first and second lens units are adapted to be easily assembled in series in the optical-axis direction. Misalignment of the plural lens groups is prevented, and the first and second lens groups are accurately and individually moved in the optical-axis direction.

Abstract: An optical pickup actuator and an optical recording and/or reproducing apparatus using the same. The optical pickup actuator includes a base having a holder positioned at one side of the base, a blade having an objective lens mounted at one side of the blade and a guide groove, a magnetic driving portion which includes at least one fine pattern coil installed across the guide groove, magnets arranged to be embedded in the guide groove opposite to each other at both sides of the FPC, and elastic supporting members having one end coupled to the holder such that the blade is movably supported.

Abstract: The present invention provides an optical pickup device comprising a light condensing means for condensing light emergent from a light source to an optical disk, a light condensing holder on which the light condensing means is mounted, a suspension holder for elastically supporting the light condensing holder, a focus coil mounted on the light condensing holder, a tracking coil mounted on the light condensing holder, and a magnetic field impression means for impressing a magnetic field upon the focus coil and the tracking coil, wherein the tracking coil is composed of a first to a third tracking coil portion combined with each other.

Abstract: An object is to provide an image pick up apparatus in which positioning of a lens barrel unit relative to a front cover with respect to the optical axis direction and directions perpendicular to the optical axis can be effected with high accuracy. In an image pick up apparatus including a lens barrel unit 201 having a photographing optical system, a structure 216 that holds the lens barrel unit 201 in such a way that the lens barrel unit 201 is movable in the direction of the optical axis of the photographing optical system and directions perpendicular to the optical axis and a front cover 205 that covers the front side of the image pick up apparatus, the position of the lens barrel unit 201 relative to the front cover with respect to directions perpendicular to the optical axis and with respect to the optical axis direction is determined by the front cover 205 when the front cover 205 is assembled.

Abstract: A lens apparatus is disclosed, which allows an optical adjustment of each lens unit, and facilitates the assembly and maintenance. The lens apparatus comprises a plurality of lens units constituting an image-forming optical system that forms an object image, and a plurality of lens-holding members holding the plurality of lens units, respectively. Each of the lens units and the lens-holding member holding the lens unit are unitized. The lens apparatus is formed by joining each of the plurality of lens-holding members to at least one of the other lens-holding members.

Abstract: A magnetically positioned precision holder for optical components in an optical device comprises a carrier for replaceably holding at least one optical component. The carrier is arranged in positionally adjustable fashion in a housing recess including a precision stop surface. Magnet pairs (A1/A2 and B1/B2) are oriented with identical polarity being provided in order to achieve a continuous contact pressure of the carrier (2; 3) against the stop surface (6), in such a way that the one magnet (A1, B1) is located in the recess and the corresponding magnet (A2, B2) is located in the carrier. The use of identically poled magnet pairs for movable precision holders and for precision positioning systems is also proposed.

Abstract: An optical apparatus includes a light-quantity-adjusting unit, a first lens unit disposed closer to an object than the light-quantity-adjusting unit, a second lens unit disposed closer to an image plane than the light-quantity-adjusting unit, and a drive unit for driving the first lens unit and the second lens unit in an orthogonal-to-optical-axis direction.

Abstract: A microlens assembly is automatically aligned (positioned) to facilitate optimal light beam transmission between two spaced-apart subsystems (e.g., two printed circuit boards) supported within a larger system (e.g., a server system). The microlens assembly is controlled by the first subsystem, which also includes a light source (e.g., an emitter array) that generates the light beams by converting data signals. The second subsystem is provided with a receiver capable of receiving the light beams from the light source. The microlens assembly manipulates the microlens according to a raster light beams over a wide area surrounding the second subsystem. The optimal position of the microlens is determined by measuring a strength of each light signal, and by identifying an optimal strength light signal. The microlens assembly is then locked into the position associated with the optimal light signal.

Abstract: An optical pick-up includes a lens holder and a lens holder supporting portion. The lens holder has a focusing coil, a tracking coil, and a pair of nickel plates arranged to sandwich the focusing coil from the top and the bottom. The lens holder supporting portion includes a pair of permanent magnets having their magnetic poles of the same polarity opposite to each other and sandwiching the lens holder as seen in two dimensions. A sidewall of a slide hole is pressed against a slide shaft. Thus, a disk drive which can suppress a jerky motion of the lens holder when it moves along the slide shaft with a simple mechanism is provided.

Abstract: Systems and methods for actuating lens assemblies (e.g., for purposes of zoom and/or focus lens operations) that may be implemented, for example, in any camera lens or other lens application that employs one or more actuatable lenses.

Abstract: An objective lens driving apparatus for an optical pickup includes a blade on which an objective lens can be mounted, a plurality of elastic support members supporting the blade and capable of elastically moving with respect to the blade, and a servo mechanism driving the blade up and down, left and right, and in a rotational direction. The elastic support members are grouped into pairs arranged to face each other with respect to a center of rotation of the blade, and distances between the elastic support members in the respective pairs are substantially identical. By lessening the difference in the amount of deformation between the elastic support members supporting the blade during tilt control, the elastic support members are less likely to move in undesired directions when vibration is applied.

Abstract: The present invention relates to an image pick-up lens, an image pick-up apparatus comprising the image pick-up lens and a producing method of the image pick-up lens, and the image pick-up lens comprising: a lens part to form an image point of an object point at predetermined distance; and a supporting part to support the lens part and integrally formed with the lens part in a tubular form extended from the periphery of the lens part along the optical axis of the lens part, and the tip end of the tubular form is included in an ideal plain surface perpendicular to the optical axis of the lens part, wherein the image point is located in the ideal plain surface.

Abstract: The invention provides an inexpensive and easily manufactured objective lens driving apparatus having a reinforcing rib for reinforcing a coil restraining part of a support printed board formed on a lens holder. The ends of a focusing coil and a tracking coil are wound around the support printed board and the reinforcing rib part in a bundle.

Abstract: A micro actuator for controlling a focal depth includes: a lens for forming a focal point by focusing light coming from a light source; a lens mounting unit having a lens mounted therein and allowing the lens to move in one axial direction; and an electromagnetic force generator consisting of a constant magnetic field generating member having a magnetic field in a predetermined direction and a variable magnetic field generating member for changing direction and strength of a magnetic field according to direction and amount of a current, installed at and around the lens mounting unit and causing the lens to move in a direction of an electromagnetic force generated by interaction of the two magnetic field generating members. The micro actuator for controlling a focal depth can be fabricated in a ultra-compact size, available for a mass production, and has a fast response speed.

Abstract: A linear positioning apparatus includes an intermediate portion having an axis, and first and second end portions mounted with flexure legs thereto. The flexure legs accommodate motion of the intermediate portion relative to the end portions along the axis, but inhibit motion of the intermediate portion relative to the end portions in directions not parallel to the axis. The apparatus can accommodate forces having off-axis components, and produce motion that comprises substantially no off-axis component. The apparatus is useful in, for example, optical systems where precise linear motion is required.

Abstract: When a lens holder 2A is in a neutral position, a ratio of a gap between opposing surfaces of one tilt magnet 10a, 10b and one tilt coil 5 which oppose to each other, to a radial direction thickness of the tile magnet 10a, 10b, is in the range of 1/2 to 1/3. In at least one tilt coil of the tilt coils, a ratio of a light axis direction inside distance of the tilt coil to a light axis direction height of the tilt magnet, is in the range of 1/1.5 to 1/4. With this arrangement, even if the objective lens is shifted in a tracking direction or in a focusing direction, variation in the sensitivity and the linearity of the radial tilt movement is small, and an internally accessible area is increased.

Abstract: An optical pickup actuator includes a base having a holder installed at one side thereof, a moving portion in which an objective lens is installed at the periphery thereof and a guide hole is formed, a bobbin coupled to the guide hole, a magnetic driving portion provided at the base and symmetrically arranged to make the moving portion perform focusing and tracking, and suspensions having one end supported at the holder and the other end fixed to the moving portion to be connected to the bobbin. Thus, since the magnetic driving portion is symmetrically arranged, a pitching mode and a rolling mode generated due to an asymmetrical structure are prevented. Also, the AC sensitivity and DC sensitivity can be improved.

Abstract: An objective lens driving apparatus includes a lens holder 1 that holds an objective lens 2, and a stationary base 9 that supports the lens holder 1 by a support shaft 3 parallel to an optical axis of the objective lens 2. A stationary yoke 11 and the magnet 8 are mounted to the stationary base 9. A focusing coil 4 and the tracking coils 5a and 5b are mounted to the lens holder 1. The interaction between the current in the focusing coil 4 and the magnetic field caused by the magnet 8 generates an electromagnetic force that moves the lens holder 1 along the support shaft 3. The interaction between the current in the tracking coils 5a and 5b and the magnetic field caused by the magnet 8 generates an electromagnetic force that rotates the lens holder 1 about the support shaft 3.

Abstract: An objective lens driving apparatus is used for accurately positioning an abject to focus a light spot on an optical recording medium. A lens holder holds the objective lens and has a bearing hole through which a shaft extends in a direction parallel to the optical axis so that the lens holder is rotatably supported on the shaft. Two magnets are supported on the lens holder so that the shaft is between the magnets. A base has two magnetic members disposed such that each of the two magnets exerts an attraction force on a corresponding one of the two magnetic members to urge the lens holder in a direction of the optical axis and in a direction perpendicular to the optical axis. A first coil set of first focusing and tracking coils and a second coil set of focusing and tracking coils are mounted to the two magnetic members.

Abstract: An optical pickup actuator includes a bobbin, support members, and a pair of magnetic circuits. An objective lens is mounted on the bobbin. The support members have first ends fixed on sides of the bobbin and second ends fixed to a holder placed on a portion of a base to allow the bobbin to move with respect to the base. The magnetic circuits are installed on two sides of the bobbin and on the base. Each magnetic circuit includes a tracking coil which moves the bobbin in a tracking direction, a plurality of focusing/tilting coils which moves the bobbin in at least one direction of a focusing direction and a tilting direction having a focusing component, and a magnet which faces the focusing/tilting coils and the tracking coil and have a polarized structure to move the bobbin in the tracking direction and at least one direction of the focusing direction and the tilting direction having the focusing component.

Abstract: A pickup head actuator for carrying a plurality of near-field optical I/O elements, far-field optical I/O elements, or magnetic I/O elements. Besides performing focusing and tracking servo, the attraction due to magnetic inductor and tracking magnet enables a base to float at different heights in its normal state, suitable for different types of I/O elements.

Abstract: A diaphragm device has a first base plate and a second base plate that are installed with a predetermined interval therebetween and formed into a unit. The diaphragm device is installed to a mounting portion of a lens frame such that the second base plate is disposed adjacently to a light source. The two base plates are partitioned with an intermediate plate to form two accommodating chambers, a stopping-down blade and a covering blade being disposed in each accommodating chamber. A motor is attached to the first base plate to relatively rotate a set of plate members and another set of plate members so as to restrict optical path apertures by the stopping-down blades. Portions directly exposed to light source light are provided with gray or white heat-resistant painting.

Abstract: A driving device, and more particularly, a lens driving device, for transporting a lens of an optical instrument via separate actuation of the lens itself includes guide elements connected perpendicularly with the lens for guiding reciprocating movement of the lens. The device further has driving elements arranged coplanar with the lens and fixed by a first end to a periphery of the lens for providing the lens with a transport force which is larger than an interactive force between the lens and the guide elements.

Abstract: This invention relates to an objective lens driving device which moves an objective lens; an optical pickup device, comprising this objective lens driving device, which condenses a light beam onto the information recording surface of an optical disc; and an optical information recording and/or reproduction device, comprising this optical pickup device, which drives in rotation an optical disc and moves the optical pickup device to record and/or reproduce information signals onto or from the information recording surface. Two printed coil boards, with a first printed coil with a first shape formed on at least one face and a second printed coil with a second shape formed on the other face, are provided in parallel in an objective lens driving device of this invention, and a moveable portion on which an objective lens is provided is connected with the two printed coil boards; also, a magnet is positioned between the two printed coil boards provided in parallel.

Abstract: An optical component and an image pick-up device that uses the optical component is disclosed. The optical component is capable of driving an optical lens element that is mounted within a first aperture of the optical component. The optical component includes a frame which includes the first aperture. Flexible supports attach the frame to a fixed structure so that the frame may be moved axially, or moved axially as well as rotated, while being held at a fixed radial position along an axis. The optical component includes a base having a second aperture therein that is substantially aligned with the first aperture. First and second electrodes are positioned on the frame and the base, respectively, and a voltage source is provided for generating an electric field between the electrodes, so as to cause the frame to move axially with respect to the base.

Abstract: An apparatus to drive a blade on which an objective lens is mounted including a first electromagnetic unit to generate a first electromagnetic force and a second electromagnetic unit to generate a second electromagnetic force such that when the first and second magnitudes are the same, the blade is driven in a focus direction, and when the magnitudes are different, the blade is driven in a tilt direction. Accordingly, a tilt error can be actively controlled so that a laser beam is incident on a disk in a precise direction therefore improving the qualities of recording and reproducing data. In addition, tilt control is performed by using a focus adjustment mechanism so that an additional mechanism to control tilt is not required. As a result, the size and weight of the apparatus to drive the objective lens of the optical pickup are reduced.

Abstract: An optical reproducing apparatus in which reproduction of information is carried out by using an optical record carrier. In order to compensate a radial tilt between the surface of the record carrier and the objective lens, the objective lens is tilted. In the optical apparatus of the invention, the actuator of the radial displacement of the objective lens is used to also tilt the objective lens at the same time. A displacement of the objective lens in the radial direction by the actuator has a direct effect of tilting the objective lens. This is accomplished by a mechanical link between the radial displacement and the radial tilting. This has the advantage that there is no need for an extra tilt actuator to tilt the objective lens.

Abstract: An objective lens driving apparatus includes a lens holder 1 that holds an objective lens 2, and a stationary base 9 that supports the lens holder 1 by a support shaft 3 parallel to an optical axis of the objective lens 2. A stationary yoke 11 and the magnet 8 are mounted to the stationary base 9. A focusing coil 4 and the tracking coils 5a and 5b are mounted to the lens holder 1. The interaction between the current in the focusing coil 4 and the magnetic field caused by the magnet 8 generates an electromagnetic force that moves the lens holder 1 along the support shaft 3. The interaction between the current in the tracking coils 5a and 5b and the magnetic field caused by the magnet 8 generates an electromagnetic force that rotates the lens holder 1 about the support shaft 3.

Abstract: An objective lens driving apparatus includes a lens holder 1 that holds an objective lens 2, and a stationary base 9 that supports the lens holder 1 by a support shaft 3 parallel to an optical axis of the objective lens 2. A stationary yoke 11 and the magnet 8 are mounted to the stationary base 9. A focusing coil 4 and the tracking coils 5a and 5b are mounted to the lens holder 1. The interaction between the current in the focusing coil 4 and the magnetic field caused by the magnet 8 generates an electromagnetic force that moves the lens holder 1 along the support shaft 3. The interaction between the current in the tracking coils 5a and 5b and the magnetic field caused by the magnet 8 generates an electromagnetic force that rotates the lens holder 1 about the support shaft 3.

Abstract: This invention relates to an objective lens driving device which moves an objective lens; an optical pickup device, comprising this objective lens driving device, which condenses a light beam onto the information recording surface of an optical disc; and an optical information recording and/or reproduction device, comprising this optical pickup device, which drives in rotation an optical disc and moves the optical pickup device to record and/or reproduce information signals onto or from the information recording surface. Two printed coil boards, with a first printed coil with a first shape formed on at least one face and a second printed coil with a second shape formed on the other face, are provided in parallel in an objective lens driving device of this invention, and a moveable portion on which an objective lens is provided is connected with the two printed coil boards; also, a magnet is positioned between the two printed coil boards provided in parallel.

Abstract: A lens driving device includes a moving body equipped with a lens and a driving magnet attached to the lens, and a fixed body that is equipped with a driving coil that forms together with the driving magnet a magnetic circuit and moves the moving body in an optical axis direction of the lens between a first lens retaining position and a second lens retaining position, and at least one magnetic member disposed adjacent to at least one of two end sections in the optical axis direction of the driving magnet. The moving body is retained at the first lens retaining position by magnetic attraction caused by the driving magnet and the magnetic member when energization of the driving coil is stopped. Accordingly, the driving coil does not need to be energized while the lens is retained at the first lens retaining position.

Abstract: This invention discloses a position detecting apparatus that can suppress the decrease of position detection accuracy. The position detecting apparatus includes a position sensor outputting position detecting signals which have different phases respectively that change periodically according to the movement of an object, and a phase converting unit generating phase converted signals which have different phases respectively by giving predetermined phase differences to the plurality of position detecting signals. In addition, the position detecting apparatus further includes a first calculating unit obtaining first position data corresponding to a position of the object based on the plurality of position detecting signals, and a second calculating unit obtaining second position data corresponding to a position of the object based on the plurality of phase converted signals.

Abstract: An actuator used with an optical pickup to drive a blade, on which an objective lens is mounted, in focusing and tracking directions, includes a pair of magnets installed on a base, and a plate coil installed in the blade to be placed between the magnets. Each magnet has a shape in which N and S poles of the magnet are alternately magnetized in four regions asymmetrically split vertically and horizontally. In this structure, the actuator used with an optical pickup can be less affected by sensitivity variations when the blade is displaced, and the size of the electromagnetic driving unit can be reduced by reducing the number of magnetized gaps formed in the magnet.

Abstract: The object of the present invention is to further improve a lens barrel moving mechanism of a liquid crystal projector and to provide a lens moving mechanism which has simple structure and is capable of achieving the smooth and high precision movement of a lens barrel, and a liquid crystal projector employing the lens moving mechanism. The present invention provides a lens moving mechanism for moving a lens retaining member 20, which retains a lens barrel 15 provided therein with a projection lens for projecting light with image information, in the directions of Z axis and X axis. The lens moving mechanism comprises first and second guiding mechanisms 23, 23, 24, 24 including a track member, a movable member, and a plurality of rolling members arranged between a rolling member running surface of the track member and a rolling member running surface of the movable member, whereby the lens barrel 15 is guided by the first and the second guiding mechanisms 23, 23, 24, 24 in the directions of Z axis and X axis.

Abstract: A coil substrate used for a lens driving apparatus is provided in a drive device for an optical disc. The coil substrate includes a tracking coil and a pair of focus coils disposed on a substantially rectangular substrate. The pair of the focus coils is disposed on the both sides of the tracking coil in the direction of the longer side of the substrate. The tracking coil and the focus coils may be substantially aligned in the direction of the longer side of the substrate, or may have the substantially equal lengths in the direction of the shorter side of the substrate. Thereby, the lengths of the coils in the direction of shorter side of the coil substrate can be made smaller. Thus, the coil substrate and the magnet can be reduced in size, and the miniaturization of the entire lens driving apparatus can be achieved.

Abstract: An objective lens driving apparatus includes a lens holder 1 that holds an objective lens 2, and a stationary base 9 that supports the lens holder 1 by a support shaft 3 parallel to an optical axis of the objective lens 2. A stationary yoke 11 and the magnet 8 are mounted to the stationary base 9. A focusing coil 4 and the tracking coils 5a and 5b are mounted to the lens holder 1. The interaction between the current in the focusing coil 4 and the magnetic field caused by the magnet 8 generates an electromagnetic force that moves the lens holder 1 along the support shaft 3. The interaction between the current in the tracking coils 5a and 5b and the magnetic field caused by the magnet 8 generates an electromagnetic force that rotates the lens holder 1 about the support shaft 3.

Abstract: An objective lens driver includes a movable body, a base, a supporting portion, a first multipolar magnet and a second multipolar magnet. The movable body includes an objective lens, a lens holder, and a coil substrate. The coil substrate includes a focusing coil and a tracking coil. The supporting portion allows the movable body to move in a focusing direction and a tracking direction with respect to the base. The focusing direction is parallel to the optical axis of the objective lens, while the tracking direction is perpendicular to the focusing direction. The first and second multipolar magnets sandwich the coil substrate between them. The focusing and tracking coils are arranged as two flat coils on two mutually parallel separate planes so as to overlap with each other at least partially in a direction that is perpendicular to the focusing and tracking directions.

Abstract: An optical pickup actuator includes a bobbin. At least one focus coil and at least one track coil are arranged at both sides of the bobbin to secure the remaining sides of the bobbin. The optical pickup actuator can drive an optical pickup in a focus direction, a track direction, and a tilt direction. The focus coil is also used as the tilt coil. An optical pickup actuator is driven by arranging a bobbin on a base of the optical pickup actuator so as to be moved by support members, installing at least one focus and tilt coil to drive the bobbin in focus and tilt directions and at least one track coil to drive the bobbin in a track direction at opposite side surfaces of the bobbin, arranging magnets to face corresponding sides of the opposite side surfaces of the bobbin, and dividing the focus and tilt coils into at least two sets of coils and applying an input signal to each of the sets.

Abstract: An objective lens holding apparatus includes an upper supporting portion and a bottom supporting portion not parallel with each other. The upper supporting portion and the bottom supporting portion have respectively one end connecting to an objective lens holder and another end connecting to a supporting arm anchor dock. The objective lens is mounted to the objective lens holder and is prevented from incurring an inclined angle while the objective lens is yawing. The elastic supporting arm anchor dock can keep the high resonant frequency within a desired range to enhance the stability of the optical pick-up head during reading and writing operations.

Abstract: An objective lens unit has a reinforcing frame portions formed along an outer peripheral surface of each of a pair of tracking coils by applying an epoxy resin adhesive to portions between a lens holder and the outer peripheral surface of each of the tracking coils. Reinforcing core portions are formed by filling the epoxy resin adhesive into a central hole of each of the tracking coils, and a reinforcing connecting portion is formed by filling the epoxy resin adhesive into a gap defined by the lens holder, each of the tracking coils, and a focusing coil.

Abstract: An optical pickup actuator includes a bobbin. At least one focus coil and at least one track coil are arranged at both sides of the bobbin to secure the remaining sides of the bobbin. The optical pickup actuator can drive an optical pickup in a focus direction, a track direction, and a tilt direction. The focus coil is also used as the tilt coil. An optical pickup actuator is driven by arranging a bobbin on a base of the optical pickup actuator so as to be moved by support members, installing at least one focus and tilt coil to drive the bobbin in focus and tilt directions and at least one track coil to drive the bobbin in a track direction at opposite side surfaces of the bobbin, arranging magnets to face corresponding sides of the opposite side surfaces of the bobbin, and dividing the focus and tilt coils into at least two sets of coils and applying an input signal to each of the sets.

Abstract: A lens position control unit of an optical pickup device, which is able to reduce the overall size of the device, to reduce the weight of the device, and to simplify the fabrication process by patterning coils for focusing, tracking, and radial tilt driving of a lens on a printed circuit board (PCB), comprises: a lens holder, on which a lens is fixed, disposed on upper part of a suspended yoke plate; suspension wires for supporting the suspension of the lens holder and applying electric power; coil PCBs, on which coils for focusing, tracking, and radial tilt driving of the lens holder are patterned, attached on front and rear parts of the lens holder; and magnets positioned at predetermined intervals from the coil PCBs to drive the lens by interaction with the coil PCBs.

Abstract: In an optical pickup device, an upper plate portion, leg portions and a support shaft are provided in a base member so as to be disposed above a lens holder. A mechanism for adjusting the tilt angle of an objective lens is constituted by lower end surfaces formed out the curved surfaces of the leg portions, and reception surfaces formed out of the valley-like surfaces of an optical chassis. An electromagnetic drive mechanism for the lens holder includes the leg portions, magnets, and coils of the lens holder.

Abstract: A lens driving device includes a moving body equipped with a lens and a driving magnet attached to the lens, and a fixed body that is equipped with a driving coil that forms together with the driving magnet a magnetic circuit and moves the moving body in an optical axis direction of the lens between a first lens retaining position and a second lens retaining position, and at least one magnetic member disposed adjacent to at least one of two end sections in the optical axis direction of the driving magnet. The moving body is retained at the first lens retaining position by magnetic attraction caused by the driving magnet and the magnetic member when energization of the driving coil is stopped. Accordingly, the driving coil does not need to be energized while the lens is retained at the first lens retaining position.