摘要:
An optical pickup assembly having an elastically supported tilt mechanism. The optical pickup assembly includes a bobbin at which an objective lens is mounted and an elastic support member which supports the bobbin in elastic motion with respect to a holder installed at a base. A focus coil and a tracking coil are installed at the bobbin and form a conducting path for driving the objective lens in a focusing direction and a tracking direction. Tilt coils are installed at one side of the bobbin and form a conductive path for driving tilt of the objective lens. A first magnet and a first yoke generate an electromagnetic force to driving the objective lens together with the current carrying focus coil and tracking coil. A second magnet and a second yoke generate an electromagnetic force to driving the objective lens together with the current carrying tilt coils. A position detecting sensor measures relative inclination of the objective lens with respect to a disk, and a balance member coupled to the bobbin to balance the weight of the tilt coils by applying weight corresponding to the weight of the tilt coils at positions symmetrically opposite to the positions of the tilt coils.
摘要:
An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam generated from the laser beam source to an information recording surface of an optical disk; a variation adjusting plate which is movably disposed on the pickup base to be moved in vertical and lateral directions, and has a rotational hole formed at a central portion thereof; and a rotation adjusting plate including a rotational section having a predetermined curvature which is inserted into the rotational hole of the variation adjusting plate, and with a laser beam source fixed therein, the rotation adjusting plate being rotated with respect to the variation adjusting plate. An optical system including a collimating lens and a reflective mirror is fixed to the pickup base. Since the light path with respect to the field angle and the beam shift is adjusted by moving and/or rotating the light emitting point of the laser beam source with respect to the light axis of the collimating lens, the size of the optical pickup becomes smaller. Further, since the collimating lens and the light source are fixed to the respective structures, the light path is controlled regardless of the focal distance of the collimating lens. Accordingly, if the focal distance of the collimating lens has to be lengthened, the beam shift and the field angle can be precisely adjusted without enlarging the optical pickup.
摘要:
An optical pickup and an optical recording and/or reproducing apparatus include a light source which emits light having a first wavelength, an objective lens that focuses incident light on an information storage medium and is optimized for a first information storage medium of a predetermined standard, a polarization changer which changes the light with the first wavelength incident from the light source into light beams with first and second polarizations that are orthogonal to each other, a polarization hologram element which has a varying refractive power according to the polarization of the light with the first wavelength that passes through the polarization changer, a photodetector which receives light after the light has been emitted from the light source, focused on the information storage medium by the objective lens, and reflected by the information storage medium, and an optical path changer which guides the light reflected by the information storage medium toward the photodetector, wherein the optical pickup can compatibly adopt the first information storage medium and a second information storage medium which has a different thickness from the first information storage medium.
摘要:
An optical pickup actuator having: a moving part on which an objective lens to focus an incident beam onto an optical recording medium is mounted, a magnetic driver that drives the moving part in track and focus directions of the optical recording medium, and a support element that movably supports the moving part and has a first support portion with a first predetermined stiffness and a second support portion with a second predetermined stiffness different from the first predetermined stiffness. A center of gravity of the moving part, a center of support of the support element, and a center of a force determined by arrangement of the magnetic driver are coincident.
摘要:
An optical pickup including an optical member which inhibits interference light reflected from an adjacent layer from being received by a photodetector when an optical information storage medium includes a plurality of recording layers on at least one side thereof. The optical pickup suppresses a photodetector, especially first and second sub-photodetectors of the photodetector, from receiving the interference light reflected from the adjacent layer.
摘要:
A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a corresponding incident light beam with a high NA suitable for the high density recording medium and a light spot suitable for use on another recording surface of the low density recording medium by focusing another corresponding incident light beam, and an actuator provided to apply tilt to the objective lens. The light beam for the low density recording medium is incident on the objective lens as a divergent beam. When the objective lens is shifted in a radial direction, a tilt is applied to the objective lens corresponding to the shift.
摘要:
An optical pickup including an optical member which inhibits interference light reflected from an adjacent layer from being received by a photodetector when an optical information storage medium includes a plurality of recording layers on at least one side thereof. The optical pickup suppresses a photodetector, especially first and second sub-photodetectors of the photodetector, from receiving the interference light reflected from the adjacent layer.
摘要:
An optical pickup and an optical recording and/or reproducing apparatus adopting the same are provided. The optical pickup includes an optical unit, first and second objective lenses, and an optical path switching unit. The optical unit illuminates light onto an information storage medium and receives light reflected from the information storage medium to detect an information signal and/or an error signal. The first and the second objective lenses focus incident light to form a light spot on an information storage surface of the information storage medium. The optical path switching unit selectively directs the light incident from the optical unit to one of the first and second objective lenses. In the optical pickup, since the light quantity directed to a plurality of objective lenses may be maximized, optical efficiency is increased and thus high-speed operation may be attained.
摘要:
An optical pickup and a lens assembling apparatus and a method thereof are provided. The optical pickup includes a plurality of objective lenses and a lens holder. The lens holder has a plurality of installation holes into which the plurality of objective lenses are inserted. In the lens holder, a seat surface of at least one of the installation holes is formed as a curved surface so that an inclination adjustment of the objective lens installed thereon can be performed. Since the seat surface of at least one of the installation holes provide to the lens holder is formed as a curved surface so that the inclination adjustment of the lens can be performed, the inclination adjustment between the plurality of objective lenses can be performed without an increase in the number of the parts or an increase in the number of the assembling processes.
摘要:
A three-Dimensional (3D) imaging apparatus is provided. The 3D imaging apparatus includes a first member including a first region and a second region therein; at least one second member movably coupled to the first member such that the at least one second member is movable out of and into the second region; a plurality of lens units disposed in the first region while the at least one second member is disposed in the second region, wherein, when the at least one second member moves out of the second region, at least one of the plurality of the lens units moves from the first region into the second region.