Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An optical pickup device for recording and/or reproducing the information on or from an optical disc.

Abstract: A recording and reproducing device adapted to a cartridge accommodating a recordable optical disc includes a holder arranged to a device main body and having an opening formed on the front side of the device main body and for holding the cartridge inserted from the opening thereof. A recording and reproducing part is arranged to record and reproduce information on the disc, and a carrier is movably arranged between the holder and the recording and reproducing part for transferring the cartridge from the holder to the part. A locking unit arranged to lock the cartridge held by the holder includes a lock lever including a first protrusion engaged with the cartridge normally inserted from the opening of the holder and a second protrusion for preventing error insertion of the cartridge therefrom.

Abstract: A disc cartridge loading device for a recording medium utilizes a cartridge holder for holding a disc cartridge used as a recording medium for information signals. The cartridge holder performs a movement operation when moved from a first position permitting insertion/withdrawal of the disc cartridge to a second position for loading the disc cartridge into a loading portion of a recording/reproducing apparatus. The loading device further comprises a vertical movement operation mechanism including a vertical movement operation plate for allowing vertical movement of the cartridge holder with respect to the loading portion.

Abstract: In a reproducing apparatus accommodating a plurality of recording mediums and reproducing a selected recording medium from the plurality of recording mediums, the recording medium is stored and is selectively reproduced by a more simplified operation method allowing a size reduction in the reproducing apparatus. A storage of a stack of holding means for holding recording mediums is moved by a displacing means in the stacking direction to move a selected holding means to a transportable position, from which transportable position the selected holding means may be ejected by motion in one direction or may be moved into a position appropriate for reproduction by motion in the opposite direction.

Abstract: A loading device includes a first tray for holding a disk, positioned above and in register with a second tray for holding a cassette, and a mechanism for simultaneously carrying the first and second trays between extracted positions outside of the loading device and retracted positions inside of the loading device. The loading device houses a disk recording and/or reproducing device and a cassette recording and/or reproducing device, and the carrying mechanism carries the first tray to the disc recording and/or reproducing device and the second tray to the cassette recording and/or reproducing device.