Abstract: An image stabilization apparatus includes a fixed barrel, a movable barrel, a support member configured to movably support the movable barrel with respect to the fixed barrel, a drive unit configured to include a magnet and a coil, and drive the movable barrel, a control section configured to drive and control the drive unit, a position detection section configured to detect a position of the movable barrel, and a judgment section configured to detect, when the drive unit drives via the movable barrel so as to move to a predetermined target position, a deviation between the position of the movable barrel and the predetermined target position and judge whether or not the apparatus operates normally based on whether or not the deviation falls within a first allowable range.

Abstract: A shake correction apparatus includes: a stationary portion (21) having coils (22S, 22L, 23S, 23L, 24S, 24L) arranged; a movable portion including magnets (52a, 52b, 52c, 52d, 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d) opposed to the coils and an imaging element; a supporting member for movably supporting the movable portion to the stationary portion along a plane orthogonal to an optical axis of light entering into the imaging element; means for detecting a position of the movable portion; and means for controlling current flowed into the coils based on output of the detection means, the coils including at least three coil pairs when two coils opposed to each other along the plane orthogonal to the optical axis are paired, driving forces of two coils forming each coil pair being different.

Abstract: An image stabilization apparatus includes a fixed barrel member, a movable barrel member configured to hold an optical lens, a support member configured to movably support the movable barrel member with respect to the fixed barrel member within a plane orthogonal to an optical axis of the optical lens and a drive unit configured to drive the movable barrel member with respect to the fixed barrel member, in which the fixed barrel member or the movable barrel member includes a support member disposing portion configured to rotatably accommodate the support member and limit an amount of movement of the support member within a plane and a small spatial region portion formed by notching part of the support member disposing portion so as to communicate with the support member disposing portion, an interior of the small spatial region portion being filled with a lubrication member.

Abstract: A shake correction apparatus includes: a stationary portion (21) having coils (22S, 22L, 23S, 23L, 24S, 24L) arranged; a movable portion including magnets (52a, 52b, 52c, 52d, 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d) opposed to the coils and an imaging element; a supporting member for movably supporting the movable portion to the stationary portion along a plane orthogonal to an optical axis of light entering into the imaging element; means for detecting a position of the movable portion; and means for controlling current flowed into the coils based on output of the detection means, the coils including at least three coil pairs when two coils opposed to each other along the plane orthogonal to the optical axis are paired, driving forces of two coils forming each coil pair being different.

Abstract: An image stabilization apparatus includes a fixed barrel, a movable barrel, a support member configured to movably support the movable barrel with respect to the fixed barrel, a drive unit configured to include a magnet and a coil, and drive the movable barrel, a control section configured to drive and control the drive unit, a position detection section configured to detect a position of the movable barrel, and a judgment section configured to detect, when the drive unit drives via the movable barrel so as to move to a predetermined target position, a deviation between the position of the movable barrel and the predetermined target position and judge whether or not the apparatus operates normally based on whether or not the deviation falls within a first allowable range.

Abstract: An image stabilization apparatus includes a fixed barrel member, a movable barrel member configured to hold an optical lens, a support member configured to movably support the movable barrel member with respect to the fixed barrel member within a plane orthogonal to an optical axis of the optical lens and a drive unit configured to drive the movable barrel member with respect to the fixed barrel member, in which the fixed barrel member or the movable barrel member includes a support member disposing portion configured to rotatably accommodate the support member and limit an amount of movement of the support member within a plane and a small spatial region portion formed by notching part of the support member disposing portion so as to communicate with the support member disposing portion, an interior of the small spatial region portion being filled with a lubrication member.

Abstract: Provided is an image blur correcting device, including: an image pickup element (42); an image pickup element holder (41) movable in an X direction and in a Y direction orthogonal to the optical axis, and has the image pickup element placed thereon in such a manner that two mutually orthogonal sides extend along the X direction and the Y direction; a frame-like base (31) for supporting the image pickup element holder (41) in a movable manner in the X direction and in the Y direction; and first and second electromagnetic drive means, each arranged on sides extending along Y direction of the image pickup element (41), formed of coils (45a, 45b, 46a, 46b)and magnets (47a, 47b, 48a, 48b) for driving the image pickup element holder (41), with respect to the base (31), in the X direction and in the Y direction.

Abstract: Provided is an image blur correcting device, including: an image pickup element (42); an image pickup element holder (41) movable in an X direction and in a Y direction orthogonal to the optical axis, and has the image pickup element placed thereon in such a manner that two mutually orthogonal sides extend along the X direction and the Y direction; a frame-like base (31) for supporting the image pickup element holder (41) in a movable manner in the X direction and in the Y direction; and first and second electromagnetic drive means, each arranged on sides extending along Y direction of the image pickup element (41), formed of coils (45a, 45b, 46a, 46b) and magnets (47a, 47b, 48a, 48b) for driving the image pickup element holder (41), with respect to the base (31), in the X direction and in the Y direction.

Abstract: Shafts are fixed to a base and extend in a direction parallel to a center axis of a through hole of the base. Two yoke arrangements are installed to the shafts. A lens holder frame holds a lens, which has an optical axis parallel to the central axis of the through hole of the base. The lens holder frame is axially placed in a space between the two yoke arrangements and is swingably supported by a plurality of wire springs, which are fixed to the base. Drive coils are fixed to the lens holder frame and generate a drive force to move the lens holder frame.

Abstract: Shafts are fixed to a base and extend in a direction parallel to a center axis of a through hole of the base. Two yoke arrangements are installed to the shafts. A lens holder frame holds a lens, which has an optical axis parallel to the central axis of the through hole of the base. The lens holder frame is axially placed in a space between the two yoke arrangements and is swingably supported by a plurality of wire springs, which are fixed to the base. Drive coils are fixed to the lens holder frame and generate a drive force to move the lens holder frame.

Abstract: An optical pick-up apparatus for writing and/or reading information on and/or from an optical record medium including a light source, an objective lens projecting a light beam emitted by the light source onto the optical record medium, a holding member holding the objective lens movably in a focusing direction to perform a focusing control, a carriage to which the holding member is secured, a supporting mechanism for supporting the carriage movably in a tracking direction to effect a tracking control as well as an access control, and a driving member moving a movable member including the objective lens, holding member and carriage in the tracking direction. The supporting mechanism includes guide rails extending in the tracking direction and slide bearings formed in the carriage and coupled with the slide bearings. A coefficient of static friction of the movable member is set to a value not larger than 0.25.

Abstract: An optical system driving apparatus includes a holding member holding an optical element and having first and second surfaces facing in opposite directions, and a carriage having first and second surfaces which contact the surfaces of the holding member and slidably clamp the surfaces of the holding member. At least one of a slidable contact surface portion of the first surface of the holding member which corresponds to the first surface of the carriage and a slidable contact surface portion of the first surface of the carriage which corresponds to the first surface of the holding member is formed into an at least partly spherical shape having a center coinciding with an optical center of the optical element, and the other portion guides the holding member to move in a circumferential direction of the spherical slidable contact surface portion.

Abstract: An optical system driving apparatus including a holder 2 supporting an objective lens 1, resilient supporting members 29a, 29b for supporting the holder movably in a focusing direction Z perpendicular to a record medium, and focusing coils 4a, 4b secured to the holder 2 by means of viscoelastic members 3a and 3b. The focusing coils 4a, 4b and a viscoelastic members 3a, 3b serve as a dynamic damper so that undesired resonance can be effectively suppressed without narrowing a control frequency range.

Abstract: Write data, which has been modulated in a 4/11 mode and converted in an NRZI mode, is written on a sample servo type optical disk by means of a magnetic head and a laser diode in a pickup. A signal reproducer in an optical disk unit comprises a differentiating circuit for differentiating a reproduced signal originating from data recorded on the optical disk after detected by the pickup, an A/D converter for sampling a differential signal synchronously with a channel clock, and a difference detector for reproducing data by performing difference detection on results of A/D conversion. The difference detector includes a register, a selector, and a determiner.

Abstract: A sheet made from a foamed polystyrene resin which is heat-shrinkable in one axial direction and has a heat-insulatingness is prepared. A printing process is applied to this sheet to produce a label. A container made from a thermo-plastic resin is covered with said cylindrical label and is put in a furnace in order to heat-shrink the label to be fitted on the container.The container with the label manufactured in accordance with the present invention has a superior heat-insulatingness, and thus can maintain the temperature of water contained therein for a longer time. Also, when it is used in a electronic-range, a temperature of an outer wall surface of the container can be prevented from increasing, and thus the container can be held by a bare hand even immediately after cooking.

Abstract: Thermoplastic polyimide foams are provided which essentially consist of recurring units represented by the formula (I): ##STR1## wherein X is a bond, divalent hydrocarbon radical having from 1 to 10 carbon atoms etc. and R is an aliphatic radical having 2 or more carbon atoms, cycloaliphatic radical etc.The foams have an apparent density of from 0.02 to 0.2 g/cc, average cell diameter of 0.1 to 1 mm and a closed cell content of 50% or more.

Abstract: A heat-shrinkable polyolefin composite sheet obtained by laminating a heat-shrinkable foamed polyolefin sheet and a polyolefin-base film with a polyurethane-base adhesive is disclosed.

Abstract: The invention relates to a heat-shrinkable polystyrene-base foamed sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat-shrinkable polystyrene-base film with a polyurethane-base adhesive wherein printing is applied to the laminating surface of the sheet and/or the film.

Abstract: Thermoplastic polyimide foams are provided which essentially consist of recurring units represented by the formula (I): ##STR1## wherein X is a bond, divalent hydrocarbon radical having from 1 to 10 carbon atoms etc. and R is an aliphatic radical having 2 or more carbon atoms, cycloaliphatic radical etc.The foams have an apparent density of from 0.02 to 0.2 g/cc, average cell diameter of 0.1 to 1 mm and a closed cell content of 50% or more.