Abstract: The following lens apparatus is disclosed.

Abstract: In a lens barrel having a first holding tube holding a first optical system and a second holding tube holding a second optical system, support rollers are arranged at three parts on the periphery of each of the first and second holding tubes to restrain these optical systems from tilting. The positions of the support rollers are arranged to be respectively shifted from the centers of gravity of the holding tubes either forward or rearward in the direction of an optical axis.

Abstract: In a lens barrel having a first holding tube holding a first optical system and a second holding tube holding a second optical system, support rollers are arranged at three parts on the periphery of each of the first and second holding tubes to restrain these optical systems from tilting. The positions of the support rollers are arranged to be respectively shifted from the centers of gravity of the holding tubes either forward or rearward in the direction of an optical axis.

Abstract: An image blur correction apparatus in which, even when a driving amount of a moving member is large, deterioration of driving efficiency is minimized without enlarging a driving device comprises a driving device having driving means comprising a flat coil and magnets arranged opposite the coil to drive a moving member by supplying electricity to the coil, the the coil is integrally constituted with the moving member. A relationship of a width of a driving direction of the coil and a width of the opposite magnet is set so that the width of the magnet is set greater than the width of the coil, and smaller than a length obtained by adding a maximum driving amount of the moving member to the width of the coil.

Abstract: An image blur correction apparatus comprises a correction optical system for image blur correction held by a supporting member, driving means for driving the correction optical system, a resilient member for holding the correction optical system substantially at the center of an optical axis, and a guide member for holding the correction optical system for movement along a plane orthogonal to the optical axis. The elastic member and the guide member are disposed in or substantially the same plane orthogonal to the optical axis, or disposed in planes orthogonal to the optical axis and differing in the direction of the optical axis.

Abstract: A lens barrel includes fixed tubes each arranged to hold an optical unit having an optical axis, a rotating tube arranged to rotate around the optical axis with respect to the fixed tubes, wherein the rotating tube is provided, at front and rear portions thereof as viewed along the optical axis, respectively with end surfaces of ring shape having a center thereof on the optical axis, and each of the fixed tubes is provided with an end surface opposite to the associated end surface of the rotating tube, and sheet members of ring shape having a center thereof on the optical axis, each of the sheet members being disposed on a space formed by each end surface of the rotating tube and the associated end surface of the fixed tubes, so that the torque of a rotating operation on the rotating tube is lessened and, yet, the lens barrel excels in dust-proof and drip-proof.

Abstract: A lens barrel comprising a vibration motor including an annular rotor and an annular stator provided coaxially with the optical axis, a first rotary ring capable of rotation about the optical axis, a first rotary member receiving a rotational force from the first rotary ring or the rotor and adapted to rotate about a rotary shaft extending in a radial direction perpendicular to the optical axis, a second rotary ring having the first rotary member, a first pressurizing device for applying pressure for maintaining the rotor and the stator of the vibration motor in mutual pressure contact, and a second pressurizing device for applying pressure for maintaining the first rotary ring and the first rotary member in mutual pressure contact, wherein the first rotary ring, the rotor and the first rotary member constitute a differential mechanism, and the first rotary member effects revolution about the optical axis by the differential mechanism and rotates the second rotary ring about the optical axis.

Abstract: A torque converter including a stator rotatable about an axis and having a stator hub, and a thrust bearing mounted to the stator hub. The stator hub has a recessed portion that is recessed from one axial end face of the stator hub. The thrust bearing includes a bearing race received by the recessed portion of the stator hub. A coupling connects the bearing race with the stator hub. The coupling includes a first engaging part disposed on an outer periphery of the bearing race and a second engaging part engaged with the first engaging part and disposed on an outer periphery of the recessed portion in opposed relation to the outer periphery of the bearing race. The first and second engaging parts cooperate to prevent a relative rotation between the bearing race and the stator.

Abstract: A driving device for an optical member or an optical apparatus comprises a first transmitting member for transmitting a driving force provided by a driving source, a second transmitting member for transmitting a driving force provided by a manual operation, an output member to which the driving forces from the first and second transmitting members are transmitted, the optical member being moved by a rotation of the output member, and a planetary rotating member in contact with the second transmitting member and the output member, wherein the planetary rotating member is supported for rotation with respect to the first transmitting member, and the first transmitting member rotates while revolving the planetary rotating member.

Abstract: A lens barrel includes a plurality of lens units, a plurality of cams arranged to respectively cause the plurality of lens units which are being rotated around an optical axis during a focusing action to move in the optical axis direction, at least one of the plurality of cams being a range varying cam which causes a moving range of the associated lens unit to vary according to a magnification varying state, and a rotary driving member arranged to be rotated around the optical axis by a manual operation or by a motor, wherein the plurality of lens units are interlinked with the rotary driving member in such a way as to be movable in the optical axis direction relative to the rotary driving member independently of each other and rotatable integrally with the rotary driving member.

Abstract: In this invention, an image blur correction apparatus adapted to an optical apparatus, which has an image blur correction means, a driving means for driving the image blur correction means in a predetermined direction, and an energization control means for controlling energization to the driving means in accordance with a vibration signal corresponding to the vibration state of the optical apparatus, also has an energization restricting means for restricting a current supplied to the driving means by the energization control means to less than a predetermined restricting level, and a determination means for determining the restricting level of the energization restricting means in accordance with the detection result of a gravitation direction detection means for detecting the gravitation direction, whereby the upper limit of the energization amount to the driving means is changed in accordance with the gravitation direction to attain driving suitable for the direction of gravitation acting on the apparatus.

Abstract: The present invention relates to a method for producing a resin-impregnated structure reinforced by continuous fibers in which a practically endless continuous fiber bundle is dipped in a bath of molten resin and simultaneously passes through a space between a pair of opening pins. The opening pins can be positioned on sides of the bundle so that the continuous fibers are sandwiched by the pins without coming in contact with them. By doing so, the fibers of the bundle can be opened and can be impregnated with the resin. In addition, the foregoing continuous fiber-reinforced resin structure may be cut into pieces having a desired length to provide columnar products.

Abstract: A lens barrel or an optical apparatus includes a first lens arranged to move for varying an image forming magnification, a second lens arranged to move for focusing and for compensating for a change in image forming position resulting from a movement of the first lens, a focusing part arranged to drive the second lens and having a backlash, and a zooming part which is arranged to drive the first lens and the second lens in an interlocking manner and to cause the second lens to move by using a part of the focusing part. The backlash is corrected when zooming is performed by the zooming part.

Abstract: The present invention relates to a lens barrel with an extender attachable thereto, and comprises a focusing lens movable in directions of an optical axis, a position detecting member for detecting a position of the lens, a data detecting member for detecting information on the extender, and a forbidding member for setting a permissible area in which the autofocusing is permitted with respect to the position of the lens based on the information, permitting the autofocusing when the position of the lens is within the permissible area, and forbidding the autofocusing when the position of the lens is out of the permissible area.

Abstract: An optical apparatus includes a first zooming lens, a designating device for designating a zooming range, a storing circuit for storing the zooming range designated by the designating device, and a driving control device for zooming the first lens within the zooming range stored in the storing circuit.

Abstract: In an automotive heating system, an engine coolant circuit for circulating engine coolant through an engine of a vehicle is provided with a heat exchanger for transferring heat between the engine coolant and air, and a heat accumulator which stores heat of the engine coolant. The engine coolant circuit has a first coolant circulating path through which the engine coolant from the engine passes the heat accumulator and the heat exchanger in this order and a second coolant circulating path through which the engine coolant from the engine passes the heat exchanger and the heat accumulator in this order. The engine coolant is caused to circulate through the first coolant circulating path when the temperature of heat stored in the heat accumulator is higher than the temperature of the engine coolant while heating is required and through the second coolant circulating path when the former temperature is lower than the latter temperature while heating is required.

Abstract: A camera of the pre-winding type having a built-in motor, in which a loaded film is wound prior to a photographing operation which is performed with the film being rewound, comprises a motor, a film winding mechanism arranged to be driven by the motor serving as a drive source, a mirror mechanism arranged to be driven by the motor serving as a drive source, a film rewinding mechanism arranged to be driven by the motor serving as a drive source, and a switching mechanism for transmitting an output of the motor to the film winding mechanism of the mirror mechanism in response to rotation of the motor in a first direction and for transmitting an output of the motor to the film rewinding mechanism in response to rotation of the motor in a second direction, the switching mechanism being arranged to change over the transmission of an output of the motor when rotating in the first direction from transmission to the film winding mechanism to transmission to the mirror mechanism in response to the rotation of the moto

Abstract: A light measuring device in which the field of a photometric system is divided into a plurality of areas, and the outputs of these areas are computed based on the one of various formulae which is selected depending on the relative size of the subject image to the total field as the focal length of a photographic lens varies, to obtain an exposure value.

Abstract: A camera has a flexible printed circuit board provided with a storage device, such as an EEPROM, which is capable of electrically effecting the writing and erasing of information. The flexible printed circuit board is disposed along a front surface portion and along another surface portion of a camera body, and an information writing pad for the storage device is disposed in such a manner as to overlay a surface of a projecting portion which projects forward from a substantially flat portion of the camera body.

Abstract: A single-lens reflex camera having a motor-driven focusing device comprises a switch arranged to be controlled by an external operating member which is provided for turning off a power supply; and motor control means arranged to drive, in association with the switch, the motor-driven focusing device to shift its position to a given position where a photo-taking lens is at its minimum length. The camera, therefore, can be carried in a compact state for improved portability. The camera case also can be compactly arranged.