Abstract: A light source device includes an outer housing, a partitioning member for forming a multi-stage structure in the outer housing, thereby partitioning each stage, a plurality of light source units disposed in respective stages of the outer housing, each of which has light source members and a heat pump unit for cooling the light source members, an opening portion for taking air acting as cooling air to be supplied to a cooling body from an outer part of the outer housing into an inner part thereof, and an opening portion formed along arrangement of the light source units in the partitioning member.

Abstract: A light source apparatus includes an outer casing. A light source member and a light source module having a cooling body which cools the light source member are disposed in the outer casing. A wind tunnel which surrounds a heat pipe unit as the cooling body of the light source module is provided in the outer casing. The wind tunnel includes a wind passage which allows cooling wind to pass through the heat pipe unit. An intake-opening is formed in a surface of the outer casing, and cooling wind is taken into the outer casing from outside thereof through the intake-opening. One end of the wind passage of the wind tunnel is connected to the intake-opening.

Abstract: An optical-system driving device is achieved that can switch over between objective lenses and is space-saving, lightweight, and simply-configured. An optical-system driving device for recording information onto or playing it back from an optical storage medium, includes a stationary unit having a rotation axis; a movable unit pivotable about the rotation axis; pivotal movement means for pivotally moving the movable unit about the rotation axis; and the movable unit includes a holder having a plurality of optical means that is able to focus a beam of light onto the optical storage medium, and a plurality of conductive elastic members for supporting the holder, wherein an optical axis of each of the plurality of optical means is located substantially equidistant from the rotation axis, and the optical means for focusing the beam of light onto the optical storage medium is selected by pivotally moving the movable unit with the rotation means.

Abstract: An objective lens driving apparatus includes an objective lens (13) collecting a light flux emitted from a light source on a optical disk (11), and a lens holder (14) holding the objective lens (13). The lens holder (14) includes a first bonding portion (14i) and a second bonding portion (14j) for holding the objective lens (13) by means of bonding. The objective lens (13) is fixed to the lens holder (14) by applying a first bonding adhesive (25) to the first bonding portion (14i) to thereby bond the objective lens (13) thereto, adjusting an inclination of an optical axis of the objective lens (13) while causing the first bonding adhesive (25) to deform, and applying a second bonding adhesive (26) to the second bonding portion (14j). The second bonding adhesive (26) has a larger Young's modulus after curing than the first bonding adhesive (25).

Abstract: The optical driving device according to the present invention includes a holder for holding a plurality of optical each of which focuses on an optical disk a light beam outputted from a light source, focusing coils, and tracking coils; a plurality of elastic support members for supporting the holder so as to be movable in an approximately radial direction of the optical disk and in an approximately perpendicular direction to the optical disk; and a base for holding inner yokes placed inside the holder, and magnets that generate magnetic fields with respect to the focusing coils and to the tracking coils; as for the optical driving device, the top face of the holder has a closed structure over the inner yokes.

Abstract: Included are, a module fixing body having a plurality of mounting holes into which laser modules are fitted and accommodated, respectively; an electricity-supplying member having an end provided with electricity-supplying terminals, which are connected to electricity-receiving terminals of the laser module accommodated in the mounting hole; and a cooling member that cools each of the laser modules. A groove in which the electricity-supplying member is accommodated is formed in a surface of the module fixing body, and the cooling member is closely arranged on the surface of the module fixing body.

Abstract: Included are a plurality of cylindrical holders having holes into which laser modules are fitted and fixed, respectively; a plate-like base that has a first surface, a second surface opposite to the first surface, and a plurality of through holes through which the laser beams from the plurality of laser modules fixed to the holder pass, the holders abutting against the first surface so as to connect the holes thereof to the through holes of the base, the second surface of the base being arranged with a plurality of lenses corresponding to the through holes; and adhesives applied to outer corners of abutment portions, at which the base and the LD holders abut against each other, for fixing the base and the LD holders to each other.

Abstract: An objective is to provide a light source device having a light emission source such as a semiconductor laser (LD), an LED and a lamp, and an optical part such as a lens and a fiber for transmitting, transferring and light-focusing, in which, by controlling the amount of sulfate ions inside the device at a low level, adhesion of ammonium sulfate to the optical part can be prevented. The light source device includes a light source for emitting light, an optical part for processing light emitted from the light source, and a housing in which the optical part is housed, or to which the optical part is mounted, and the housing is formed by machining material that includes no sulfur component, and the material is exposed on the surface thereof.

Abstract: An object lens driving apparatus (100) includes a lens holder (4) that holds an object lens (1) facing a recording medium and is so supported that the lens holder (4) is movable toward and away from the surface of the recording medium. A focusing coil (5) is fixed in the interior of the lens holder (4) so that the focusing coil (5) surrounds an optical axis of the object lens (1). By apply current to the focusing coil (5), a driving force is generated, which moves the lens holder (4) toward and away from the surface of the recording medium. By disposing the focusing coil (5) in the interior of the lens holder (4) so that the focusing coil (5) surrounds the optical axis of the object lens (1), a movable part of the object lens driving apparatus (100) can be reduced in size and weight, so that a high sensitivity can be accomplished.

Abstract: An optical-system driving device is achieved that can switch over between objective lenses and is space-saving, lightweight, and simply-configured. An optical-system driving device for recording information onto or playing it back from an optical storage medium, includes a stationary unit having a rotation axis; a movable unit pivotable about the rotation axis; pivotal movement means for pivotally moving the movable unit about the rotation axis; and the movable unit includes a holder having a plurality of optical means that is able to focus a beam of light onto the optical storage medium, and a plurality of conductive elastic members for supporting the holder, wherein an optical axis of each of the plurality of optical means is located substantially equidistant from the rotation axis, and the optical means for focusing the beam of light onto the optical storage medium is selected by pivotally moving the movable unit with the rotation means.

Abstract: In a conventional optical-means driving device mounting a plurality of objective lenses, a lens holder is provided with introduction holes to serve thereinto inner yokes, so that it has been difficult to enhance stiffness and to increase secondary resonance. The optical-means driving device according to the present invention includes a holder for holding a plurality of optical means each of which focuses on an optical disk a light beam outputted from a light source, focusing coils, and tracking coils; a plurality of elastic support members for supporting the holder so as to be movable in an approximately radial direction of the optical disk and in an approximately perpendicular direction to the optical disk; and a base for holding inner yokes placed inside the holder, and magnets that generate magnetic fields with respect to the focusing coils and to the tracking coils; as for the optical-means driving device, the top face of the holder has a closed structure over the inner yokes.

Abstract: An object is to provide a light source unit that focuses a laser beam, having different divergence angles in longitudinal direction and lateral direction, so as not to allow longitudinally and laterally deviating from an incident end-face of an optical fiber.

Abstract: An optical element driving apparatus includes a holder that holds a plurality of switchable optical elements for focusing light on a recording medium, a resiliently deformable supporting unit that supports the holder, a focusing driving unit that drives the holder in a direction of optical axes of the optical elements, and a tracking driving unit that drives the holder in a tracking direction perpendicular to the direction of the optical axes. The switching of the optical elements is performed by moving the holder by means of the tracking driving unit, so as to select one of the optical elements that focuses light on the recording medium.

Abstract: A light source unit includes a laser element that includes a plurality of light emitting points that are arranged along one direction on an end face thereof and irradiates laser beams having a spread in a spreading direction that is perpendicular to the one direction. A cylindrical lens held by a first body tube collimates the laser beams in block. Circular lenses held by a second body tube condense the collimated beams into an inlet of an optical fiber. The first body part and the second body part are positioned and directly coupled to each other so that an optical axis of the cylindrical lens accords with that of the circular lenses.

Abstract: An object is to provide a light source unit that focuses a laser beam having different divergence angles in longitudinal direction and lateral direction, without deviating longitudinally and laterally from an incident end-face of an optical fiber, and also that simplifies assembling lenses into a lens barrel. The light source unit herein provided includes a first lens barrel 1 that holds cylindrical lenses 10 and 11, and 12 for forming a parallel-ray laser beam by refracting the laser beam 9 having different divergence angles in longitudinal direction and lateral direction emitted from a laser element 7, a second lens barrel 2 that holds circular lenses 13 and 14 for focusing the parallel-ray laser beam onto the entrance of the optical fiber 3, and a lens holder 15 that holds at least one of the cylindrical lenses and is inserted into the first lens barrel 1 and fixed therein.

Abstract: An objective lens driving apparatus includes an objective lens (13) collecting a light flux emitted from a light source on a optical disk (11), and a lens holder (14) holding the objective lens (13). The lens holder (14) includes a first bonding portion (14i) and a second bonding portion (14j) for holding the objective lens (13) by means of bonding. The objective lens (13) is fixed to the lens holder (14) by applying a first bonding adhesive (25) to the first bonding portion (14i) to thereby bond the objective lens (13) thereto, adjusting an inclination of an optical axis of the objective lens (13) while causing the first bonding adhesive (25) to deform, and applying a second bonding adhesive (26) to the second bonding portion (14j). The second bonding adhesive (26) has a larger Young's modulus after curing than the first bonding adhesive (25).

Abstract: An optical element driving apparatus includes a holder that holds a plurality of switchable optical elements for focusing light on a recording medium, a resiliently deformable supporting unit that supports the holder, a focusing driving unit that drives the holder in a direction of optical axes of the optical elements, and a tracking driving unit that drives the holder in a tracking direction perpendicular to the direction of the optical axes. The switching of the optical elements is performed by moving the holder by means of the tracking driving unit, so as to select one of the optical elements that focuses light on the recording medium.

Abstract: An object lens driving apparatus (100) includes a lens holder (4) that holds an object lens (1) facing a recording medium and is so supported that the lens holder (4) is movable toward and away from the surface of the recording medium. A focusing coil (5) is fixed in the interior of the lens holder (4) so that the focusing coil (5) surrounds an optical axis of the object lens (1). By apply current to the focusing coil (5), a driving force is generated, which moves the lens holder (4) toward and away from the surface of the recording medium. By disposing the focusing coil (5) in the interior of the lens holder (4) so that the focusing coil (5) surrounds the optical axis of the object lens (1), a movable part of the object lens driving apparatus (100) can be reduced in size and weight, so that a high sensitivity can be accomplished.

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: An optical actuator according to this invention includes a focusing lens for focusing a laser beam on a information disk, a lens holder for holding the focusing lens, a focusing coil for driving the focusing lens in an axial direction of the laser beam, a tracking coil for driving the focusing lens in a radial direction of the information disk, a tilting coil for pivotally rotating the focusing lens on an axis along the tangential direction of the disk and a pair of supporting members each disposed on each opposing sides of the lens holder. Each of the supporting members having at least three fixing elements disposed in an approximately circular arc, and a plurality of linear elastic members are connected to each of the fixing elements.