Abstract: A magneto-optical head includes a focus lens for forming a light spot on a disk, a magnetic field generation coil arranged between the lens and the disk, and a heat conductor for conducting heat generated at the coil. The heat conductor is connected to a winding of the coil and extending radially outward from the coil.

Abstract: A magneto-optical head including a lens forming a light spot on a storage disk, a magnetic field generating coil arranged between the lens and the disk to surround the optical center of the lens, and an annular heat sink arranged around the coil. The distance between the outer circumference of the coil and the inner circumference of the heat sink is 70-100 ?m.

Abstract: Disclosed is an automatic irrigation system of the simplified structure which can intermittently supply water (and liquid fertilizer) required by farmer products under the water saving condition depending on the weather condition of the day (an amount of solar beam in a day) without relation to the size of irrigation area. In this automatic irrigation system, water of the water source is pumped up with a motor pump which is driven with electric power generated by a solar panel and is then stored in a reserving tank. When a predetermined amount of water is stored in the reserving tank, a water draining means continuously drains all the water in the reserving tank. This cycle is repeated in proportion to an amount of solar beam in a day. The water is then guided to the irrigation area with a tube irrigation system. An amount of water to be irrigated is proportional to that of solar beam in a day. A liquid fertilizer mixing device is also used simultaneously when it is required.

Abstract: There are disclosed an optical storage device for accessing an optical recording medium such as a phase change type of optical disk and an optical magnetic disk, and a liquid crystal device preferably applicable to such a optical storage device. The liquid crystal device has a structure that two liquid crystal layers, each of which has stripe-like shaped electrodes arranged in a direction perpendicularly intersecting one another, are superposed. This structure makes it possible to effectively correct an aberration caused by a change in a depth from a surface of an optical recording medium to a condensing point, for example, in cases of unevenness in thickness of a protective layer and a multi-layer recording.

Abstract: A magnetic head includes a dielectric member, a coil and a heat conductor. The dielectric member has an obverse surface held in facing relation to a data storage disk. The coil generates a required magnetic field. The coil is provided in the dielectric member or in the obverse surface of the dielectric member. The heat conductor absorbs heat generated by the coil. The heat conductor has a heat conductivity which is higher than that of the dielectric member. The heat conductor has a surface which is at least partially irregular.

Abstract: A magnetic head includes a multi-layer coil for generating a magnetic field, and a flat, magnetic field regulator spaced from the coil along the central axis of the coil. The field regulator is formed with a center hole for passing disk-illuminating light. The magnetic member consists of a plurality of sections that are electrically insulated and arranged around the central axis of the coil.

Abstract: There are disclosed an optical storage device for accessing an optical recording medium such as a phase change type of optical disk and an optical magnetic disk, and a liquid crystal device preferably applicable to such a optical storage device. The liquid crystal device has a structure that two liquid crystal layers, each of which has stripe-like shaped electrodes arranged in a direction perpendicularly intersecting one another, are superposed. This structure makes it possible to effectively correct an aberration caused by a change in a depth from a surface of an optical recording medium to a condensing point, for example, in cases of unevenness in thickness of a protective layer and a multi-layer recording.

Abstract: There are disclosed an optical storage device for accessing an optical recording medium such as a phase change type of optical disk and an optical magnetic disk, and a liquid crystal device preferably applicable to such a optical storage device. The liquid crystal device has a structure that two liquid crystal layers, each of which has stripe-like shaped electrodes arranged in a direction perpendicularly intersecting one another, are superposed. This structure makes it possible to effectively correct an aberration caused by a change in a depth from a surface of an optical recording medium to a condensing point, for example, in cases of unevenness in thickness of a protective layer and a multi-layer recording.

Abstract: A magnetic head includes a multi-layer coil for generating a magnetic field, and a flat, magnetic field regulator spaced from the coil along the central axis of the coil. The field regulator is formed with a center hole for passing disk-illuminating light. The magnetic member consists of a plurality of sections that are electrically insulated and arranged around the central axis of the coil.

Abstract: A magnetic head includes a dielectric member, a coil and a heat conductor. The dielectric member has an obverse surface held in facing relation to a data storage disk. The coil generates a required magnetic field. The coil is provided in the dielectric member or in the obverse surface of the dielectric member. The heat conductor absorbs heat generated by the coil. The heat conductor has a heat conductivity which is higher than that of the dielectric member. The heat conductor has a surface which is at least partially irregular.

Abstract: A communication terminal device by which it is possible to reduce the communication expenses, and to improve operational performance. The communication terminal device includes a CODEC circuit which has communication ability of a V.34 mode, is formed by a hardware, and codes and decodes image data. The communication terminal device includes a CODEC program which has the communication ability equal to or lower than a V.17 mode, and codes and decodes image data. When reading an image by an image reading unit and coding the image data by the CODEC circuit, or when decoding a coded image data by the CODEC circuit and printing the image of the image data by an image printing unit, if a calling demand for the communication is generated, a main control unit waits for processing completion of coding or decoding by the CODEC circuit, and starts the calling of the communication.

Abstract: A communication terminal device of the present invention, having a function for transfer of file data such as code data and binary data, can relay or broadcast file data received from another communication terminal device to yet another communication terminal device. When the communication terminal device as the relay destination is not able to receive file data, the communication terminal device of the present invention converts the received file data to facsimile coded data and transmit it. For that purpose, the communication terminal device is provided with a character generator that converts code data to image data.

Abstract: When confidential data is received in an empty mailbox of a facsimile machine, a receipt notification is printed out from a printer or displayed in a screen. However, if there is old data stored in the same mailbox, a receipt notification is not printed nor displayed.

Abstract: The present invention relates to an information reading and writing device for an optical signal, and the optical system is simplified by using a diffraction optical element. A semiconductor laser is used as a light source. There is provided an image formation lens for condensing a beam of light and forming an image on an optical disk medium. In an optical path between the semiconductor laser and the image formation lens, there is provided a hologram having a function of the hologram region diffraction optical element for detecting a tracking error signal of the medium and a focus detection error signal. Two optical detecting elements 24a, 24b for detecting the focus error respectively have two divided regions. Under the condition that the medium is in focus, beams of light diffracted in the two hologram regions 23a, 23b for detecting the focus become the convergent beams which are most converged on a dividing line of the respective optical detecting element and in the direction of the optical axis.

Abstract: The copier-facsimile system including a recording unit for making a copy of an original or reproducing facsimile image data sent from a remote facsimile and a flap-type paper tray extending outward from a body of the communication terminal device when it is used such that a user can manually feed a recording sheet to the recording unit therefrom. The copier-facsimile system further includes an input key for inputting a first size of a recording sheet to be fed to the recording unit from the flap-type paper tray for printing facsimile image on the recording sheet and a second size of a recording sheet to be fed to the recording unit from the flap-type paper tray for making a copy. RAM stores the first size. The controller changes the recording sheet size setting of the recording unit to the first paper size from the second paper size upon completion of a copy operation if the first paper size is not equal to the second paper size and the copy operation has been carried out using the flap-type paper tray.

Abstract: A tandem type color printer, having optical beam scanning units and corresponding photosensitive drums, which detects a positional shift of a scanning locus occurring on a corresponding one of the plurality of photosensitive drums, and automatically corrects the detected positional shift of the scanning locus. A detecting window, in which a beam transmission time varies with a change in the beam scanning position, is provided at each of the start end side and the terminal end side of each of a plurality of beam scanning loci in a mask plate. The mask plate is arranged between the optical beam scanning units and the photosensitive drums, to provide output of a detection signal corresponding to the incident time of the transmission beam resulting from beam scanning by a light source, and thus determines and corrects the direction and the amount of positional shift of the scanning locus.

Abstract: An optical scanning system includes a laser source, a deflector deflecting a laser beam emitted from the laser source, and at least two hologram elements located between the deflector and an image forming member.

Abstract: An optical device for an optical disk drive, for performing focusing error detection and tracking error detection of a laser beam converged on an optical disk. The optical device includes a diffraction grating having first, second, third, and fourth regions for diffracting a reflected beam from the optical disk in different directions. The optical device further includes a first photodetector for detecting a part of the reflected beam diffracted by the first region of the diffraction grating, a second photodetector for detecting a part of the reflected beam diffracted by the second region of the diffraction grating, a third photodetector for detecting a part of the reflected beam diffracted by the third region of the diffraction grating, and a fourth photodetector for detecting a part of the reflected beam diffracted by the fourth region of the diffraction grating.

Abstract: An optical element for writing and reading signals for an optical storage unit, and an optical device including the optical element, include an optical substrate made of a material allowing the transmission of a laser beam emitted from a semiconductor laser and disposed between the semiconductor laser and an optical storage medium; a first hologram formed on the optical substrate in such a manner as to transmit the laser beam, and to allow it to be incident into the optical storage medium and to diffract the laser beam reflected by the optical storage medium inside the optical substrate; and a second hologram formed on the optical substrate in such a manner as to transmit one polarization component of the laser beam diffracted by the first hologram and propagating inside the optical substrate, to diffract the other polarization component and to thus separate both polarization components.

Abstract: A hologram optical system includes a stem, a laser diode fixed to the stem, and a focusing error detector fixed to the stem. The focusing error detector is divided into a first region and a second region by at least one straight dividing line. The hologram optical system further includes a cap mounted on the stem so as to surround the laser diode and the focusing error detector, and a hologram mounted on the cap so as to make given positional relationship with the laser diode and the focusing error detector. When the dividing line of the focusing error detector has a positive gradient, the hologram has a distribution of interference fringes such that the product of a change rate of an X-directional component of the pitch of the interference fringes and a change rate of a Y-directional component of the pitch of the interference fringes is negative.