Abstract: An optical head 2 and a matrix circuit 3 cooperate, generating a signal form the light reflected from an optical disk 1. An evaluation-function generating circuit 5 generates an evaluation function from the signal reproduced from the optical disk 1. A controller 6 sets an initial focus value at a point where the evaluation function is minimal. The initial focus value is set in a servo circuit 7. The controller 6 sets an observation point deviating from the point at which it has set the initial focus value. The controller 6 corrects the initial focus value set in the servo circuit 7.

Abstract: In an accelerometer, the stress is detected through electric amplification with the use of detecting elements 411-434 having an amplification function arranged on beams 3 and, with the use of a differential amplifier circuits 510 formed on the support base 1, an acceleration component in a detection axis direction to which the stress is applied is outputted as the differential mode and acceleration components in the other axis directions are outputted as the common mode, so that each axis sensitivity ratio between the detection axis sensitivity and the other axis sensitivities is enhanced largely.

Abstract: A game system including a stationary game machine requiring an external power supply, such as a coin-operable business-use game machine or a home game machine, and a portable game machine having an internal power supply. Game programs for raising game characters are installed in the stationary and portable game machines. The stationary game machine has more internal resources, and its programs support higher resolution video game data. The portable game machine has a vibration sensor for receiving input during play, resulting in the raising of the character. Each of these game machines are provided with a radio data transfer means through which a game result from a memory in one of the game machines can be transferred to a memory in the other game machine. The game machine receiving the game result can use that result in subsequent processing, such as for a starting point in further play or for creating video data that can be printed on a printer.

Abstract: At a step S4 of a flowchart representing the operation of a disk drive, a recording or playback operation requested by the user is carried out. Then, the flow of the operation goes on to a step S5 to form a judgment as to whether or not to correct focus precision. If the focus precision is to be corrected, the flow of the operations goes on to a step S6 at which a command is issued to move an optical pickup from the current position to a location preceding the current position by 1 track. At the next step S7, the focus precision is corrected by playing back data already recorded on the location preceding the current position by 1 track.

Abstract: A malfunction during focussing pull-in in an optical disc recording/reproducing apparatus is to be prevented. To this end, the optical disc recording/reproducing apparatus includes an optical pickup 7 having an objective lens 8 and a biaxial actuator, a photodetector for generating tracking error signals from the return light of the laser light illuminated on the optical disc and a position sensor for detecting the position of the objective lens relative to the optical disc. The optical disc recording/reproducing apparatus also includes an actuator driving circuit for controlling the servo operation of a biaxial actuator 9, based on the tracking error signals, so that the converging point of the light beam will be on the signal recording surface of the optical disc, and a pull-in range decision unit for outputting a permission signal according permission for the servo operation when the position of the objective lens 8 is within a preset range.

Abstract: The present invention is directed to a magneto-optical disc apparatus which includes a magnetic field generating source (12). The magnetic field generating source (12) is disposed so as to become freely rotatable with respect to a magneto-optical disc (1) and a spacing between it and the magneto-optical disc (1) can be changed. Plural kinds of magneto-optical discs can be recorded and reproduced with a compatibility by the common magnetic field generating source (12).

Abstract: The present invention provides a wavelength dependent compensation method in a variable optical attenuator which can precisely set the amount of attenuation within a wide range of wavelengths, and to provide superior operability. An optical signal 20a is emitted from a white light source 20 incident on a monochromator 21, and under control of a CPU 24, only an optical signal 20b of a specific wavelength is extracted and is made incident on a variable optical attenuator 22; in optical attenuator 22 under control of a CPU 24, optical signal 20b is attenuated; the power of attenuated optical signal 20c is measured by power measurer 23 under control of a CPU 24, producing compensating data; and using the pulse number corresponding to the rotation angle of the motor which activates the variable optical attenuator 22 according to this compensating data, the position of variable optical attenuator 22 is compensated to attain the desired amount of attenuation.

Abstract: The present invention provides a wavelength dependent compensation method in a variable optical attenuator which can precisely set the amount of attenuation within a wide range of wavelengths, and to provide superior operability. An optical signal 20a is emitted from a white light source 20 incident on a monochromator 21, and under control of a CPU 24, only an optical signal 20b of a specific wavelength is extracted and is made incident on a variable optical attenuator 22; in optical attenuator 22 under control of a CPU 24, optical signal 20b is attenuated; the power of attenuated optical signal 20c is measured by power measurer 23 under control of a CPU 24, producing compensating data; and using the pulse number corresponding to the rotation angle of the motor which activates the variable optical attenuator 22 according to this compensating data, the position of variable optical attenuator 22 is compensated to attain the desired amount of attenuation.

Abstract: A disk reproducing apparatus capable of improving the feeding accuracy of a pickup, reducing the cost of a feeding portion of the pickup, and realizing a small-sized skew adjustment mechanism at low cost, wherein the disk producing apparatus comprises: a disk driving unit for rotating a disk; a pickup having a first guide portion provided on one side portion and a guide face provided on the other side portion; a base member having a guide member for receiving the guide face, the guide member having a length shorter than the sliding distance of the pickup in the guiding direction; a driving unit for driving the pickup in the radial direction of the disk; and a signal processing unit for applying a specified processing to a signal reproduced from the pickup. Preferably, the first guide portion comprises: a guide shaft supported on the base; and a guide bearing provided on the one side portion of the pickup in such a manner as to be slidably inserted around the guide shaft.

Abstract: An automatic laser beam machining apparatus with a sensor that detects whether a user slots a fare (e.g. coins) for starting laser beam machining of an article. The apparatus includes a video camera that can take an image (such as the face of a user) and reproduce it by laser machining upon an article. The article is removed from a stack of the articles and automatically properly positioned for laser machining with safety and ease. A mark is provided on the article for detecting the machining condition (e.g. the material or a shape of the article) by using a sensor.

Abstract: Disclosed is a chip network electronic component prevents a short circuit between adjacent electrodes upon soldering, and the strength of the projecting portion is increased to improve reliability. The chip network electronic component includes an insulator substrate having recessed portions in opposite side surfaces to have a plurality of pairs of projecting portions. Electrodes are formed respectively at the projecting portions so as to extend from a main surface to a back surface of the substrate. Electrical elements are each formed on the main surface of the substrate to electrically connect between one pair of the electrodes. A coating layer covers a surface of the electrical elements. The recessed portion includes a pair of opposite flat planes and a flat-planed bottom connecting between the flat planes. The flat plane and the bottom has a connecting portion formed therebetween to have a curvature of 0.1 mm or greater.

Abstract: A process for preparing a multilayer film having at least one polyamide layer include the steps of forcing out from a T-die by co-extrusion a multi-layer film having a layer containing about 50 to about 95% by weight of a crystalline polyamide and about 50 to about 5% by weight of an amorphous polyamide, and stretching the film at least in the lateral direction.

Abstract: A disc skew detecting apparatus having a skew sensor for detecting skew of a disc in which information signals are recorded and reproduced with an optical pickup device, the skew sensor being located on a track on which a beam spot of the optical pickup device is positioned. Preferably, the disc skew detecting apparatus has two skew sensors for detecting skew of a disc in which information signals are recorded and reproduced with an optical pickup device, the skew sensors being located in preceding and succeeding positions of an objective lens of the optical pickup device and along a track which is incident a recording/reproducing light beam. The skew sensor being located with its measuring direction toward the center of the disc.

Abstract: The invention provides a multi-layer film having 1 to 4 polyamide layers, characterized in that at least one polyamide layer comprises about 50 to about 95% by weight of a crystalline polyamide and about 50 to about 5% by weight of an amorphous polyamide and that the multi-layer film is produced by stretching a flat film at least in the lateral direction; and a process for preparing the multi-layer film.

Abstract: A printing head comprises an elongate head substrate provided with a line of printing dots along a first longitudinal edge of the substrate, and an array of drive IC's provided on the head substrate along a second longitudinal edge of the substrate. The substrate is further provided with a plurality of connection terminals adjacent to the second longitudinal edge. The drive IC array is rendered shorter than the printing dot line to provide two excess portions at both ends of the head substrate, and the connection terminals are locally arranged within the respective excess end portions without overlapping the drive IC array longitudinally of the head substrate.

Abstract: A jet pickling apparatus for pickling the surfaces of continuously moving sheet material (12) has tips of the nozzle headers (41-43) for discharging a pickling fluid (19) on the surfaces of the sheet and into a pickling tank (31) formed into a slit shape (41a-43a), and the nozzles (41,42) at the entrance side are installed to eject pickling fluid in the same direction as the running direction of sheet while the nozzle (43) at the exit side ejects the pickling fluid in the direction opposite to the running direction of the sheet. Therefore, there is no gas in the pickling tank (31) and the tank is filled with the pickling fluid (19), which eliminates the problems of floating of the sheet (12) and insufficient contact of the pickling fluid (19) with the sheet surfaces, allowing thorough pickling and improving the pickling effect.

Abstract: A plurality of thermocouples are embedded close to each other with individually different depth in a temperature detecting block. One or more of the temperature detecting block are attached to the surface of a thermal sensor roll. When the thermal sensor roll is held in contact with a metal strip being rolled, temperatures in the thermal sensor roll are measured at a plurality of points. The temperature of the metal strip in contact with the surface of the thermal sensor roll is calculated from the graduation of a temperature in the thermal sensor roll along a direction vertical to the surface of the thermal sensor roll, without the influence of disturbances. The obtained temperature value of the metal strip being rolled is compared with an experimentally obtained temperature of heat streak formation, to predict the formation of heat streaks with high accuracy.