Abstract:
PROBLEM TO BE SOLVED: To provide an integrated optical component, an optical head and a recording and reproducing device which are advantageous to downsizing, improvement of radiating effect and cost reduction. SOLUTION: Several terminals 1014D for connecting elements are disposed in line at intervals of P1 along two sides opposed to each other of an IC chip 1011 on the surface of a substrate 1014. The terminals 1014D for connecting elements, connecting terminals of a light source 1002, connecting terminals of a light receiving element 1004 and connecting terminals 1010A of a processing circuit 1010 are connected to one another by wire on the surface 1014A of the substrate 1014. Several terminals 1014I for external connection are disposed at second intervals P2 larger than the first intervals P1 in a region corresponding to the two sides opposed to each other and one side sandwiched by the two sides of the IC chip 1011 on the rear side 1014H of the substrate 1014. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To ease limits on designing of a magnetic yoke member and a base member and improve accuracy, by bending a magnetic plate member, thereby forming a set of bent stand elements for constituting a magnetic field formation part, and setting the elements to the base member formed separately from the magnetic yoke member in a manner so that the elements can be adjusted in position. SOLUTION: Bent stand elements 28a and 28b provided at a magnetic yoke member 24, and a magnet 30 secured to the bent stand element 28a constitute a magnetic field formation part. A focus control coil 54 and a tracking control coil 55 are positioned in a magnetic gap formed between the bent stand element 28b and the magnet 30 of the magnetic field formation part. The magnetic yoke member 24 is set on a base 22 mounted on a slide base 18 in a manner so that the member 24 can be adjusted in position. All members arranged at the base 22 are covered with a case 56 having a through hole 56a corresponding to an objective lens 6. The magnetic yoke member is thus obtained by metal working of a magnetic plate body and mounted on the base member formed separately therefrom.
Abstract:
PURPOSE:To realize focussing control and tracking control having good responsiveness even with a servo current of a high frequency and durability against a change in temperature by preventing the generation of resonance during driving. CONSTITUTION:A bobin 36 having an objective lens 33 is supported in the optical axial direction of the objective lens 36 by first and second displacing members 41a and 41b parallely disposed in a direction orthogonal to the optical axial direction of the objective lens 36 so as to be displaced and positioned between the first and second displacing members 41a and 41b. Then, by a third elastic member 43 having a hinge part 46 integrally provided on one side surface of a supporting member 40 for supporting the first and second displacing members 41a and 41b this is turnably supported in a direction orthogonal to the optical axial direction of the objective lens 33.
Abstract:
PURPOSE:To make the device compact by providing arm parts at an objective- lens holding member, providing a member, which is coupled with the arm parts and movably supports the holding member so that the member can be moved into the focusing and tracking directions, and providing a coil, which imparts the moving force. CONSTITUTION:Arm parts 19b are made to protrude at both side parts of an objective-lens holding member 19. Focusing coils 30 and tracking coils 31 are provided at the outer surfaces. A holding member 10, which movably supports the member 19, is provided between the arm parts 19b. The returning light, which is reflected from a disk through an objective lens 23, is split with a splitter and detected with a photodetector. A focus error signal and a tracking error signal are operated with a control circuit. The correcting currents corresponding to the amounts of errors of the operated signals are supplied into the coils 30 and 31. As a result, the member 19 is moved into the focusing direction and turned into the tracking direction. Thus the magnitude of the movable body in the extending direction of the holding member can be made small, and the device can be made compact.
Abstract:
PURPOSE:To accurately drive/displace the optical axis of an objective lens and to realize mass production by constituting an objective 1808 holding body by means of making upper and lower bobbin half bodies connected with a pair of elastic displacement parts confront each other. CONSTITUTION:The upper bobbin half body 2 and in upper holder half body 5 are connected by the elastic displacement members 10 and 11, and they are vertically connected so as to constitute the objective lens holding body 1. For manufacture, a sheet metal such as stainless steel is punched, the upper bobbin half body 2 and the upper holder half body 5 are mold-formed with synthetic resins on an upper read frame 42 where positioning guide holes 54 and 55, plural connection parts 46 and first and second band parts 44 and 45 are formed, and an upper objective lens holding block 71 is formed. A lower holding block is similarly formed and the objective lens holding body 1 is assembled by using an automatic assembling machine. Thus, fitting precision becomes high and mass production is realized.
Abstract:
PROBLEM TO BE SOLVED: To cancel a variance, etc., of a mechanical deck when a space of an optical pickup is adjusted. SOLUTION: The assembling of the optical disk drive is carried out with an optical pickup assembling process for constituting the optical pickup by assembling a biaxial assembly to an optical assembly, a mechanical deck assembling process for assembling the above optical pickup to the mechanical deck, a space adjusting process of the optical pickup, a sticking process for sticking the above biaxial assembly to the OP assembly, an OP inspecting process for carrying out the OP inspection to the optical pickup, and an MD inspecting process for inspecting a performance of the mechanical deck to which the optical pickup is assembled. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To perform correct focus control and tracking control with good response without generating a resonance at the driving time and even with a servo current of a high frequency. SOLUTION: A supporting mechanism for supporting a bobbin 36 to which an objective lens 33 is mounted is constituted of a pair of leaf springs capable of shifting in a direction parallel to an optical axis of the objective lens 33 and a hinge member 40 arranged between the pair of leaf springs and capable of shifting in a direction orthogonal to the optical axis of the objective lens 33. The hinge member 40 has a hinge part 46 shifting in the direction orthogonal to the optical axis of the objective lens 33, to which each one end of the pair of leaf springs is fitted. When the leaf springs are shifted by driving of coils 38, 39 driving the bobbin 36, the bobbin 36 is moved in the direction of the optical axis of the objective lens 33. When the hinge member 40 is shifted, the bobbin 36 is moved in the direction orthogonal to the optical axis of the objective lens 33.
Abstract:
PURPOSE: To reduce the cost of a magnetic yoke and a base supporting it in a bi-axial drive unit, to enlarge the degree of freedom of design and to make a drive mechanism moving the whole in the radial direction of a disk a small scale. CONSTITUTION: This device is provided with a bobbin member 48 holding an objective lens 6, attaching a focus control coil 54 and a tracking control coil 55 and displacing the objective lens 6. A magnetic plate member is worked to be bent to provide bent erected pieces 28a, 28b, and a magnet is attached to the bent erected piece 28a, and the bent erected pieces 28a, 28b are arranged on the positions confronted with each other while holding the focus control coil 54 and the tracking control coil 55 therebetween. The device is provided with a magnetic yoke member 24 attached to a base member constituted of a slide base moving along the radial direction of a disk while being guided by a guide shaft and attaching a light beam generation/detection part unit and a base 22 position adjustably accompanying with the bobbin member 48.