Abstract: A tracking control method measures an optimum offset by measuring a light beam irradiation state of a light beam while offsetting a tracking target position of the light beam on a recording medium so that an optimum light beam irradiation state is obtained at the tracking target position, and carries out a tracking control by setting the measured optimum offset.

Abstract: A semiconductor component mounting apparatus for mounting a semiconductor component to test the electric characteristics of the semiconductor component, comprising: a contactor 20 with which the semiconductor component contacts; a substrate 30 which supplies an electric signal to the contractor 20; a plurality of connection components 40, each of which has an electric terminal 48 for supplying the electric signal to the substrate 30 and which is fixed to the substrate 30; a plurality of connectors 50 which has a contact pin 70 including a contact part 74 for contacting with the electric terminal 48 of the connection component 40, a housing 68 for holding the contact pin 70, a pushing apart 78 for pushing the contact pin 70 to the electric terminal 48, and which is freely-detachably connected to one of the plurality of the connection components 40; a holder 80 which holds the plurality of the connectors 50; and a fixing part 86 which fixes the holder 80 to the substrate 30, wherein the contact part 74 slides a

Abstract: A semiconductor component mounting apparatus for mounting a semiconductor component to test the electric characteristics of the semiconductor component, comprising: a contactor 20 with which the semiconductor component contacts; a substrate 30 which supplies an electric signal to the contactor 20; a plurality of connection components 40, each of which has an electric terminal 48 for supplying the electric signal to the substrate 30 and which is fixed to the substrate 30; a plurality of connectors 50 which has a contact pin 70 including a contact part 74 for contacting with the electric terminal 48 of the connection component 40, a housing 68 for holding the contact pin 70, a pushing part 78 for pushing the contact pin 70 to the electric terminal 48, and which is freely-detachably connected to one of the plurality of the connection components 40; a holder 80 which holds the plurality of the connectors 50, and a fixing part 86 which fixes the holder 80 to the substrate 30, wherein the contact part 74 slides alo

Abstract: A semiconductor component mounting apparatus for mounting a semiconductor component to test the electric characteristics of the semiconductor component, comprising: a contactor 20 with which the semiconductor component contacts; a substrate 30 which supplies an electric signal to the contactor 20; a plurality of connection components 40, each of which has an electric terminal 48 for supplying the electric signal to the substrate 30 and which is fixed to the substrate 30; a plurality of connectors 50 which has a contact pin 70 including a contact part 74 for contacting with the electric terminal 48 of the connection component 40, a housing 68 for holding the contact pin 70, a pushing part 78 for pushing the contact pin 70 to the electric terminal 48, and which is freely-detachably connected to one of the plurality of the connection components 40; a holder 80 which holds the plurality of the connectors 50, and a fixing part 86 which fixes the holder 80 to the substrate 30, wherein the contact part 74 slides alo

Abstract: A storage apparatus rotates an optical recording medium at two or more kinds of rotational speeds. The rotational speed is decreased when a read or write margin becomes less than or equal to a first predetermined value or, when a frequency of generation of a servo abnormality of a tracking servo and/or a focus servo is greater than or equal to a first predetermined frequency. On the other hand, the rotational speed is increased when the read or write margin becomes greater than or equal to a second predetermined value or, when the frequency of generation of the servo abnormality of the tracking servo and/or the focus servo is less than or equal to a second predetermined frequency.

Abstract: There is disclosed an information storage apparatus in which even when a remaining power of a battery or a galvanic cell is little, an information recording medium can safely be taken out. An MPU 12, a spindle motor driver 38, and a spindle motor 40 constitute a decelerator for decelerating rotation of the information recording medium, and as a deceleration mode, a first deceleration mode with a relatively large power consumption and a second deceleration mode with a relatively small power consumption are disposed. The MPU 12 monitors a voltage of a power supply line 13 via a DSP 16, decelerates the rotation of the information recording medium in the first deceleration mode when the voltage exceeds a predetermined level, and decelerates the rotation of the information recording medium in the second deceleration mode when the voltage indicates the predetermined level or less.

Abstract: A division test write processing unit is provided and a test writing process for deciding an optimum light emitting power by executing a test writing on a medium is divided into a plurality of division test writing processes. When an upper command is received, in the division test write processing unit, a division control unit skips to a division executing unit locating at the head of the processes which are not yet executed among a plurality of division executing units and allows the dividing processes of the test writing to be executed for a predetermined time.

Abstract: When a migration is predicted and judged of continuous recording and regeneration to an adjacent next optimum condition effective area in the course of data sequential processing for recording or regenerating data continuous in a certain optimum condition effective area, a setting control unit performs optimum condition setting processing (erase, recording, regeneration) of the next optimum condition effective area under the control of an optimum condition setting processing unit, to thereby previously determine the optimum emission power and the optimum magnetic field.

Abstract: An objective lens of an optical head is cleaned with a cartridge accommodating a cleaning disk with a brush thereon. The cleaning disk is rotated in apparatus to clean the surface of objective lens provided on the optical head. Simultaneously with causing the rotation of the cleaning disk by driving a spindle motor, the lens is moved toward and away from the disk by driving a lens actuator. Additionally, simultaneous reciprocation of a carriage carrying the optical head toward alternate inner and outer disk peripheries may be caused. Further, the operation of reciprocating the objective lens toward the inner and outer disk peripheries and the operation of moving the lens toward and away from the cleaning disk with the lens actuator may be performed in combination.

Abstract: A division test write processing unit is provided and a test writing process for deciding an optimum light emitting power by executing a test writing on a medium is divided into a plurality of division test writing processes. When an upper command is received, in the division test write processing unit, a division control unit skips to a division executing unit locating at the head of the processes which are not yet executed among a plurality of division executing units and allows the dividing processes of the test writing to be executed for a predetermined time.

Abstract: In a heater unit, comprising a lower metallic base, an upper metallic base placed closely over an upper surface of said lower base, and a resistance heater wire received in a groove defined between opposing surfaces of said lower and upper bases, ceramic powder is filled in said groove to keep said heater wire at least away from a wall surface of said groove. Thus, the heater wire can be directly installed in the groove of the base without the intervention of a sheath pipe so that the heater wire can be bent in a desired dense pattern, and the heater unit can be heated both rapidly and uniformly. Also, the ceramic powder filled in the groove improves the heat transfer, and this even further enhances the these advantages of the present invention.

Abstract: A semiconductor component mounting apparatus for mounting a semiconductor component to test the electric characteristics of the semiconductor component, comprising: a contactor 20 with which the semiconductor component contacts; a substrate 30 which supplies an electric signal to the contactor 20; a plurality of connection components 40, each of which has an electric terminal 48 for supplying the electric signal to the substrate 30 and which is fixed to the substrate 30; a plurality of connectors 50 which has a contact pin 70 including a contact part 74 for contacting with the electric terminal 48 of the connection component 40, a housing 68 for holding the contact pin 70, a pushing part 78 for pushing the contact pin 70 to the electric terminal 48, and which is freely-detachably connected to one of the plurality of the connection components 40; a holder 80 which holds the plurality of the connectors 50; and a fixing part 86 which fixes the holder 80 to the substrate 30, wherein the contact part 74 slides alo

Abstract: An upper metallic base is placed over a lower metallic base with a resistance heater element interposed between them so as to cause a plastic deformation to at least one of the opposing surfaces until the corresponding surfaces conform to an outer profile of the heater element, and the opposing surfaces of the lower and upper bases, and the resistance heater element are substantially entirely bonded to one another by a metallic bonding which may consist of brazing, soldering or diffusion bonding. Because the metallic bonding provides a favorable heat conduction, and can thereby improve the thermal efficiency and prevent local heating, a rapid temperature rise and uniform heating are made possible. Because the base consists of two parts, the material for the base can be selected from a wide range of materials including those capable of withstanding high temperatures and corrosive materials.

Abstract: A light emission adjustment processing unit of a laser diode sequentially instructs a D/A converter for light emission of a light emission by test powers at predetermined two points, allows the laser diode to emit the light, instructs a D/A converter for subtraction of subtraction currents corresponding to the test powers at two points, and measures each power by an A/D converter for monitoring. From the measurement results, a relation of the instruction values to an arbitrary power in each D/A converter is obtained by a linear approximation and registered into a power table. When deciding an optimum writing power by a test write, a limit power on the lower limit side is detected while gradually decreasing the writing power from a starting power and a predetermined offset is added to the detected limit power, thereby obtaining the optimum writing power.

Abstract: A disc apparatus has a cartridge loading/unloading mechanism to perform a loading operation for attaching an optical disc enclosed in a cartridge inserted from an outside to a rotary shaft of a spindle motor and an unloading operation for removing the optical disc from the rotary shaft of the spindle motor and for ejecting the cartridge to the outside. The loading operation of the cartridge loading/unloading mechanism is executed by the rotation of one direction of a load motor. The unloading operation of the cartridge loading/unloading mechanism is executed by the rotation in the reverse direction of the load motor. A drive current of the load motor is turned on or off at a short period, thereby adjusting so as to optimize a drive torque. When an exchangeable optical disc is loaded, a motor is activated, an initialization control is executed during the acceleration, and after a motor rotational speed reached a specific speed, the apparatus enables the writing/reading operations to be executed.

Abstract: A disc-apparatus has a cartridge loading/unloading mechanism to perform a loading operation for attaching an optical disc enclosed in a cartridge inserted from an outside to a rotary shaft of a spindle motor and an unloading operation for removing the optical disc from the rotary shaft of the spindle motor and for ejecting the cartridge to the outside. The loading operation of the cartridge loading/unloading mechanism is executed by the rotation of one direction of a load motor. The unloading operation of the cartridge loading/unloading mechanism is executed by the rotation in the reverse direction of the load motor. A drive current of the load motor is turned on or off at a short period, thereby adjusting so as to optimize a drive torque. When an exchangeable optical disc is loaded, a motor is activated, an initialization control is executed during the acceleration, and after a motor rotational speed reached a specific speed, the apparatus enables the writing/reading operations to be executed.

Abstract: A light emission adjustment processing unit of a laser diode sequentially instructs a D/A converter for light emission of a light emission by test powers at two predetermined two points, allows the laser diode to emit the light, instructs a D/A converter for subtraction of subtraction currents corresponding to the test powers at two points, and measures each power by an A/D converter for monitoring. From the measurement results, a relation of the instruction values to an arbitrary power in each D/A converter is obtained by a linear approximation and registered into a power table. When deciding an optimum writing power by a test write, a limit power on the lower limit side is detected while gradually decreasing the writing power from a starting power and a predetermined offset is added to the detected limit power, thereby obtaining the optimum writing power.

Abstract: An apparatus for reading information by projecting a light beam from an optical head onto an optical disk rotated by a spindle motor. The rotation time of the spindle motor is measured, and upon reaching a predetermined time, a cleaning request signal is sent to an upper order system. The rotation time of the spindle motor is counted by counting pulses generated with the rotation with a first counter stored in the RAM. Upon reaching a predetermined value by the count of the first counter, a second counter stored in a non-volatile memory is updated. Upon reaching a predetermined value by the second counter, a cleaning request is sent to the upper order system for display on a CRT, and a cleaning request flag in a non-volatile memory is set. When the end of cleaning of the apparatus is recognized, the cleaning request flag in the non-volatile memory is cleared.

Abstract: A seek control system used in an optical storage apparatus to move an optical head, which at least reads information from an optical disk by applying light thereto, to a target position on the optical disk. The seek control system includes a positioner for moving the optical head for seek, and a one-dimensional optical position detector having a photo-sensitive surface disposed in the path of movement of the optical head to output a position signal corresponding to a light spot position on the photo-sensitive surface. The seek control system further includes a light-emitting device provided on either the optical head or the positioner to apply light to the one-dimensional optical position detector, and a controller for controlling the drive of the positioner on the basis of a position detection output of the one-dimensional optical position detector.

Abstract: An apparatus for reading at least information by projecting a light beam from an optical head onto an optical disk rotated by a spindle motor. The rotation time of the spindle motor is measured, and upon reaching of a predetermined time, a cleaning request signal is sent to an upper order system. The rotation time of the spindle motor is counted by counting pulses generated with the rotation with a first counter stored in the RAM. Upon reaching of a predetermined value by the count of the first counter, a second counter stored in a non-volatile memory is updated. Upon reaching of a predetermined value by the second counter, a cleaning request is sent to the upper order system for display on a CRT, and a cleaning request flag in a non-volatile memory is set. When the end of cleaning of the apparatus is recognized, the cleaning request flag in the non-volatile memory is cleared.