Abstract: A lens system having at least one front movable lens group and a rear movable lens group which are movable in an optical axis direction. The lens system includes a position detector for determining whether the rear movable lens group is positioned in a predetermined normal moving range thereof; and a lens control device which stops the front movable lens group and moves the rear movable lens group rearward into the predetermined normal moving range if the rear movable lens group is in an abnormal moving range thereof in front of the normal moving range during a forward movement of the front movable lens group from a predetermined initial position thereof.

Abstract: There are provided first and second lenses, by which light incident from outside is condensed and caused to outgo, a barrel, which holds the first and second lenses, a barrel holding part having a substantially cylindrical shape to hold therein the barrel, a movement device for movement of the barrel holding part in an optical axis direction of the first and second lenses, and a pedestal having a lens receiving portion, which receives therein the barrel holding part in a slidable state, the pedestal receiving therein the barrel holding part contacting in plural lines with an inner wall surface of the lens receiving portion of the pedestal.

Abstract: A magnetic tape having a small degree of deformation, high form stability and little decrease in reproduction output even after stock at a high humidity is provided. The magnetic tape includes a longitudinally extending nonmagnetic support, a magnetic layer formed by depositing a plurality of evaporated magnetic films, each having an oblique column-like structure, on a principal surface of the nonmagnetic support so that a growth direction of each of the evaporated magnetic films is opposite to the longitudinal direction, a protective layer formed on the magnetic layer, and a backcoating layer formed on the other surface of the nonmagnetic support, wherein a heat-shrinkage ratio in the longitudinal direction and a width direction is defined to be 0.50% or less and a humidity expansion coefficient at 25° C. is defined to be 1×10?6/% RH or less after stock at 100° C. and 5% RH for 30 minutes.

Abstract: A lens system having at least one front movable lens group and a rear movable lens group which are movable in an optical axis direction. The lens system includes a position detector for determining whether the rear movable lens group is positioned in a predetermined normal moving range thereof; and a lens control device which stops the front movable lens group and moves the rear movable lens group rearward into the predetermined normal moving range if the rear movable lens group is in an abnormal moving range thereof in front of the normal moving range during a forward movement of the front movable lens group from a predetermined initial position thereof.

Abstract: A movable lens control device for controlling movements of movable lens groups including a first movable lens group and a second movable lens group, the movable lens control device including a lens driving device for moving the first and second movable lens groups in the optical axis direction; a position detector for detecting a position of the second movable lens group and determining whether the second movable lens group is in a predetermined normal moving range thereof; and a controller which controls operations of the lens driving device to stop the first movable lens group and to move the second movable lens group to a position within the normal moving range upon the position detector determining that the second movable lens group is positioned outside of the normal moving range during a movement of the first movable lens group from a predetermined initial position thereof.

Abstract: There is provided a tape recording system and head device. A tape recording system and head device include a plurality of recording sections for recording data signals on a recording medium wherein one recording section of the plurality of recording sections and another recording section arranged so as to adjoin the one recording section are disposed such that the one recording section and the another recording section are shifted from each other in a running direction and a width direction of the recording medium, and wherein the one recording section and another recording section simultaneously record a data signal on adjacent recording tracks on the recording medium.

Abstract: An actuator is provided. The actuator includes a pair of electrode layers, and an ionically conductive polymer layer arranged between the pair of electrode layers. The ionically conductive polymer layer is configured to bend or deform as a result of the application of a voltage between the pair of electrode layers. The electrode layers each include carbon particles and an ionically conductive resin, and the ionically conductive resin binds the carbon particles with each other.

Abstract: The present invention provides a recording paper comprising: a resin-coated paper comprising a base paper at least one surface of which is coated with a resin; and an ink-receiving layer provided on the resin-coated paper, and being printable by an ink-jet printer, wherein the recording paper has a thickness of 280 ?m or more and a stiffness defined by JIS-P8125 of 2.8 to 4.0 mN·m, and gives a decreasing rate in friction coefficient of a paper-contacting surface of a paper-feeding roller of an ink-jet printer between before and after friction of the paper-contacting surface with the ink-receiving layer plural times of 5% or less.

Abstract: A movable lens control device for controlling movements of movable lens groups including a first movable lens group and a second movable lens group, the movable lens control device including a lens driving device for moving the first and second movable lens groups in the optical axis direction; a position detector for detecting a position of the second movable lens group and determining whether the second movable lens group is in a predetermined normal moving range thereof; and a controller which controls operations of the lens driving device to stop the first movable lens group and to move the second movable lens group to a position within the normal moving range upon the position detector determining that the second movable lens group is positioned outside of the normal moving range during a movement of the first movable lens group from a predetermined initial position thereof.

Abstract: There is provided a tape recording system and head device. A tape recording system and head device include a plurality of recording sections for recording data signals on a recording medium wherein one recording section of the plurality of recording sections and another recording section arranged so as to adjoin the one recording section are disposed such that the one recording section and the another recording section are shifted from each other in a running direction and a width direction of the recording medium, and wherein the one recording section and another recording section simultaneously record a data signal on adjacent recording tracks on the recording medium.

Abstract: A magnetic recording medium improved in spacing loss and durability is disclosed. The magnetic recording medium is composed so that a magnetic layer is formed on a non-magnetic support, further thereon a non-magnetic protective layer having projected portions formed thereon in a discrete manner according to a thickness distribution, and further thereon a lubricant layer is formed so as to produce surface projections. In other words, the projected portions are formed in a discrete manner to the non-magnetic protective layer formed on the magnetic layer, where the non-magnetic protective layer is principally intended for the purpose of rust prevention or the like for the magnetic layer. The whole portion of the non-magnetic protective layer inclusive of the projected portions is composed with the same material.

Abstract: A wireless communication IC exchanges data with an external device by receiving a radio signal having a given carrier frequency as power supply from the external device through an antenna. The wireless communication IC includes a capacitor for storing electric power, a diode placed between one end of the antenna and the capacitor, for supplying a charge current of the radio signal to the capacitor on a half cycle of the received radio signal; and a load modulation circuit. The load modulation circuit is driven by receiving power supply from the capacitor on another half cycle of the radio signal different from a half cycle for supplying a charge current to the capacitor.

Abstract: A pair of reels of a magnetic cassette tape and a pair of reel supports of a magnetic tape drive comprise a conductive material as an antistatic treatment. Further, a head substrate and a projection substrate of a head drum comprise a conductive material having a resistance of 1×1010 &OHgr; or less and are connected to a metal base so as to be at the ground potential via the metal base and a rotating drum. These antistatic treatments allow static electricity charged on a magnetic tape to be discharged to the head substrate and the protection substrate without flowing to a magneto-resistive (MR) element, thereby preventing the electrostatic discharge breakdown of the MR element.

Abstract: A magnetic tape having a small degree of deformation, high form stability and little decrease in reproduction output even after stock at a high humidity is provided. The magnetic tape includes a longitudinally extending nonmagnetic support, a magnetic layer formed by depositing a plurality of evaporated magnetic films, each having an oblique column-like structure, on a principal surface of the nonmagnetic support so that a growth direction of each of the evaporated magnetic films is opposite to the longitudinal direction, a protective layer formed on the magnetic layer, and a backcoating layer formed on the other surface of the nonmagnetic support, wherein a heat-shrinkage ratio in the longitudinal direction and a width direction is defined to be 0.50% or less and a humidity expansion coefficient at 25° C. is defined to be 1×10−6/% RH or less after stock at 100° C. and 5% RH for 30 minutes.

Abstract: A head substrate and a projection substrate of a head drum comprise a conductive material having a resistance of 1×1010&OHgr; or less and are connected to a metal base so as to be at the ground potential via the metal base and a rotating drum. These antistatic treatments allow static electricity charged on a magnetic tape to be discharged to the head substrate and the protection substrate without flowing to a magneto-resistive (MR) element, thereby preventing the electrostatic discharge breakdown of the MR element.

Abstract: A magnetic tape drive apparatus in which data are recorded/reproduced on/from a magnetic tape by recording/reproducing magnetic heads which are disposed on a head drum and moved on a circular locus comprising cleaning device for removing deposit such as stain adhering to a magnetic head to clean the magnetic head, error rate detection device for detecting the error rate of the magnetic tape when data are recorded/reproduced onto/from the magnetic tape, and error rate storage device for storing the error rate detected by the error rate detection device, wherein the error rate detected by the error rate detection device exceeds a reference error rate by a predetermined amount, the magnetic head is cleaned by the cleaning device.

Abstract: A magnetic recording medium improved in spacing loss and durability is disclosed. The magnetic recording medium is composed so that a magnetic layer is formed on a non-magnetic support, further thereon a non-magnetic protective layer having projected portions formed thereon in a discrete manner according to a thickness distribution, and further thereon a lubricant layer is formed so as to produce surface projections. In other words, the projected portions are formed in a discrete manner to the non-magnetic protective layer formed on the magnetic layer, where the non-magnetic protective layer is principally intended for the purpose of rust prevention or the like for the magnetic layer. The whole portion of the non-magnetic protective layer inclusive of the projected portions is composed with the same material.

Abstract: A magneto-optical recording medium 11 is irradiated with a reproducing light beam 13 so that only a minute magnetic domain 313b, which is subjected to recording in a recording layer 18 and which is smaller than ½ of a spot radius of the recording light beam 13, is selected by a gate layer 17 and transferred to a magnetic domain-magnifying and reproducing layer 3. The magnetic domain transferred to the magnetic domain-magnifying and reproducing layer 3 is magnified by using a magnifying and reproducing magnetic field 411 of an alternating magnetic field. A large reproduction signal is obtained from the magnified magnetic domain 419, and the minute magnetic domain can be subjected to reproduction at a high resolving power and at a high S/N ratio. The magnified magnetic domain 419 is reduced by using a reducing reproducing magnetic field 415 of the alternating magnetic field. The gate layer 17 has a thickness which is not less than a thickness of a magnetic wall of the magnetic domain.

Abstract: A helical-scan system performs recording and reproduction on a magnetic tape by using a recording and reproducing head 5 comprising m magnetic head elements 7 (where m is 2 or larger integer). During this recording and reproduction, the following relationships are satisfied among a track width W for each of the head elements 7, a track pitch Tp between the head elements 7, and a feed amount S for a magnetic tape 6.

Abstract: A light amount distribution control device has a reflecting sheet by which light irradiated by LEDs is reflected and is radiated onto an object to be read. The light reflected by the object is made incident onto a line sensor to sense an image formed on the object. The reflecting sheet has a color distribution in which a white component increases from the center of the reflecting sheet towards the ends of the reflecting sheet. The reflecting ratio of the reflecting sheet is controlled along the longitudinal direction.