Abstract: An object of a galvanometer mirror of the present invention is to offer excellent driving characteristics in which when a mirror is driven to tilt, the center of torque acting on a moving body can be set in the vicinity of the center of the moving body. A mirror 6 is firmly fixed in a depression at the front of a rectangular frame-like mirror holder 18 constituting the moving body. First and second coils 21 and 22 are attached on the outer circumferential surface of the mirror holder 18 in the back-and-forth direction thereof at both sides of a plane passing through the center of gravity G of the moving body and parallel to the surface of the mirror. The moving body is rotatably supported by springs 23 so that a rotation axis 9 and another rotation axis orthogonal to the rotation axis 9 pass through the center of gravity G.

Abstract: A galvanometer mirror is capable of inclining a reflective mirror around an axis, and has springs. An end of the spring in the vicinity of a movable part is inserted into a second holder, and is then electrically connected to each of terminals. Flexible cables are soldered to these terminals, respectively. Thus, coils are able to receive currents passing through the flexible cables and the terminals, respectively.

Abstract: The present invention is constituted so as to enable a reduction in the number of parts of drive mechanisms of a plurality of movable members by mounting mirrors, which reflect light, respectively to holders and other movable members, which are capable of rotating around a prescribed axis, by means of springs, and, in addition, attaching coils respectively to the movable member sides as drive mechanisms for magnetically driving the respective movable members, and attaching rod-shaped magnets, the magnetic field of which acts in common with respective coils, in the members of one stator side.

Abstract: An optical pick-up apparatus according to the invention optically performs at least one of selective recording of information onto a plurality of recording layers of a plurality of optical recording mediums arranged in layers, and selective reproduction of information from the plurality of recording layers. Switching in optical circuits which are each adapted to guide a light beam to a desired recording layer is performed using a movable mirror, a galvano mirror or a biaxial movable mirror, to thereby perform selective recording of information onto the plurality of recording layers of optical disks or selective reproduction of information from the plurality of recording layers.

Abstract: An information recording reproducing apparatus for recording and/or reproducing informations on and/or from an optical recording medium. The apparatus comprises a light source, at least two objective lenses corresponding to at least two kinds of optical recording media having different thicknesses of a protective layer, respectively, a rotatable holder for supporting these objective lenses, magnetically activatable selection elements for selecting these objective lenses in accordance with the optical recording medium, the light of the light source being illuminated on the optical recording medium through the objective lens selected by the magnetically activatable selection elements, thereby performing recording and/or reproducing of the information.

Abstract: An information recording reproducing apparatus for recording and/or reproducing informations on and/or from an optical recording medium. The apparatus comprises a light source, at least two objective lenses corresponding to at least two kinds of optical recording media having different thicknesses of a protective layer, respectively, a holder for supporting these objective lenses, a selection means for selecting these objective lenses in accordance with the optical recording medium, the light of the light source being illuminated on the optical recording medium through the objective lens selected by the selection means, thereby performing recording and/or reproducing of the information.

Abstract: A substrate with a check-land, comprises a substrate which is fixed to a housing holding an optical element, and includes a check-land. A portion of the substrate, which includes the check-land, is formed to have a flexibility in relation to the other portion which does not include the check-land. Further, a check-land connecting device used for electrical connection to the check-land of the substrate with a check-land, includes a probe which is used to press a check-land of the substrate with a check-land, and a base member which is used to abut a region of a back surface of the substrate with a check-land, the region corresponding to the check-land. The probe and the base member are connected to approach and separate from each other.

Abstract: An optical element supporting device has one ends of two parallel plate springs, which are extended in a tangential direction, fixed to a holder, has the other ends thereof fixed to a fixture member, and has a collimator lens locked in an opening of the holder. A base fixed to the bottom of the fixture member has two yokes formed thereon. Magnets each polarized in two directions are fixed to the insides of the yokes. Coils are fixed to two surfaces of the holder opposed to the magnets. A target is fixed to the holder, and a sensor is fixed to the bottom of the base. When a current flows into the coils, electromagnetic force is produced along an optical axis due to the interaction between the coils and the magnets opposed to the coils. This causes the parallel plate springs to loosen. Consequently, the holder, target, collimator lens, and coils move as a whole along the optical axis.

Abstract: An information recording reproducing apparatus for recording and/or reproducing informations on and/or from an optical recording medium. The apparatus comprises a light source, at least two objective lenses corresponding to at least two kinds of optical recording media having different thicknesses of a protective layer, respectively, a rotatable holder for supporting these objective lenses, magnetically activatable selection elements for these objective lenses in accordance with the optical recording medium, the light of the light source being illuminated on the optical recording medium through the objective lens selected by the magnetically activatable selection elements, thereby performing recording and/or reproducing of the information.

Abstract: A high frequency shielding case of a semiconductor laser apparatus, according to the present invention, comprises a soldering fixing plate, together with a semiconductor laser holding member, fixed by a screw to a fixing member, a shielding case half overlaid on the fixing plate on a side opposite to the holding member and having an opening through which a terminal of the semiconductor laser is inserted, an additional shielding case half overlaid on the above-mentioned shielding case half and co-acting with the above-mentioned shielding case half to store a high frequency oscillation circuit board connected to the terminal, and a solder connecting a solder attaching portion of the fixing plate to a portion of at least one of the above-mentioned shielding case half and additional shielding case half, the portion corresponding to the solder attaching portion.

Abstract: An apparatus for supporting an optical system such as an objective lens in an optical recording and/or reproducing apparatus movably in a focusing direction and/or tracking direction including an optical system holding member, a stationary member which is provided on a carriage moving in a radial direction of an optical record disk, leaf springs having one ends connected to the optical system holding member and the other ends secured to the stationary member and being arranged in parallel with each other such that the holding member can be moved in a given direction with respect to the optical record disk, and a damping member arranged between the leaf springs for providing a damping function. The damping member is formed by injecting a fluidizable damping material into a space formed between the leaf springs and retaining the thus injected fluidizable damping material therein by a surface tension. The injected damping material may be cured to form the damping member, if necessary.

Abstract: The portion close to a rotation axis, of an S-shaped spring portion of a spring consisting of a plate material and supporting a movable member has a narrow width and a portion distant from the rotation axis has a large width. Therefore, if the movable member is rotated, the portion close to the rotation axis has a small spring constant due to bending deformation in the plate thickness direction. If the movable member is moved in other directions, the respective parts of the spring have a large spring constant due to bending deformation and shearing deformation in the surface direction. The accuracy of the supporting spring apparatus is thereby enhanced.

Abstract: An optical pickup comprises a semiconductor laser for emitting a light beam, a galvano-mirror for deflecting the light beam, a relay lens interposed between the laser and the mirror, and a condensing optical system for converging the light beam from the galvano-mirror on a storage medium. The condensing optical system includes a parallel flat plate, an imaging lens for changing the light beam from the galvano-mirror into a parallel light beam, a riser mirror for reflecting the parallel light beam, and an objective lens for converging the reflected light beam. The reflective surface of the galvano-mirror and the front focus of the objective lens are associated with each other in conjugate relative positions, which are adjusted by providing the parallel flat plate. The parallel flat plate is selected among prepared ones that have the same refractive index and different thicknesses.

Abstract: A terminal portion as a plate-like attachment portion is formed on a spring made of a plate material supporting a movable member. These portions are molded integrally at the center plane of the fixed member. Deformation due to temperature changes or external forces is prevented by bending rigidity in the surface direction of the terminal portion. This deformation is arranged to be symmetrical deformation with respect to the center plane as a center, which is the terminal portion. In this manner, the rigidity of the movable member is increased to prevent deformation and to improve the precision.

Abstract: A damping material holding gap is formed between a fixed member and a movable member having an optical element or component. A pair of convex portions or projecting portions are formed on a surface forming the damping material holding gap. A narrow portion having a reduced width is formed between these convex portions or projecting portions. The damping material is held at the narrow portion by surface tension. The damping material is thereby held at a precise position.

Abstract: A supporting surface is formed on a portion of a base member of a galvanomirror in a direction parallel to the reflection surface of a mirror. A galvanomirror container section opened in a direction parallel to the reflection surface is formed in a carriage and a bearing seat surface is formed inside the galvanomirror container section. The center axes of the supporting surface and of the bearing seat surface are aligned to the direction parallel to the reflection surface. Only by inserting the galvanomirror into the galvanomirror container section from the direction parallel to the reflection surface, the supporting surface abuts on the bearing seat surface 29. As a result, a mounting apparatus for mounting the galvanomirror 20 into the carriage 2 while adjusting the inclination of the reflection surface can be made small and the structure thereof can be simplified.

Abstract: An information recording/reproducing apparatus includes a holder for holding a cartridge inserted therein and loading it into a load position, the holder being capable of holding both a single-sided cartridge containing a recording medium having a recording surface on one side thereof and a double-sided cartridge containing a recording medium having recording surfaces on both sides thereof, a thickness of the double-sided cartridge being the same as that of the single-sided cartridge.

Abstract: Holding parts are formed on a base just inside the parts fixing both ends of a guide rail on the base. The holding parts are provided with respective U-shaped channels which are so formed as to surround the guide rail with a space. A damping material is put between the guide rail and the channel and also, put in a wedge-shaped space surrounded by a receiving face, a mounting face and a D-cut part provided at each of both ends of a guide rail. The structure of the present invention enables reduction of the vibration conveyed from a recording/regenerating head to a chassis, securely fixing a guide rail and preventing lean of the optical axis of the recording/regenerating head.

Abstract: An aberration correcting mechanism includes a corrective optical glass for correcting a spherical aberration and a link mechanism for movably supporting the corrective optical glass. The corrective optical glass is a parallel, flat plate having the same refractive index as that of a cover glass of a disk, and its length is slightly greater than the moving distance of an objective. The link mechanism has first and second links. While one end of each of the links is rotatably attached to its corresponding end portion of the corrective optical glass, the other ends of the links are rotatably mounted on the mounting portions on a deck base. The link mechanism also has a third link and a solenoid, and one end of the third link is rotatably attached to the central portion of the second link, while the other end of the third link is rotatably attached to the solenoid. The solenoid is fixed to a fixed portion on the deck base.

Abstract: An optical recording and/or reproducing apparatus having an objective lens adjusting mechanism suitable for a compact optical pickup device. The apparatus has a carriage for holding an objective lens, and a guide. The carriage is movable along the guide. The apparatus has an objective lens adjusting device for adjusting an inclination of the optical axis of the objective lens in rotational directions about two axes perpendicular to the optical axis of the objective lens and to each other.