Abstract: A method for manufacturing a battery is provided. The method includes suctioning a part of a strip-shaped separator in a plurality of holes of a winding core in a peripheral surface of the winding core; preparing a wound body by winding strip-shaped positive and negative electrodes along with the strip-shaped separator around the winding core; and preparing an electrode body by releasing the suction in the holes and pulling out the winding core from the wound body, in which the battery includes a battery container configured to accommodate the electrode body, the holes are communicated inside with the winging core having a hollow structure, and the winding core has an outside diameter of 2 mm or less.

Abstract: A method for manufacturing a battery is provided. The method includes suctioning a part of a strip-shaped separator in a plurality of holes of a winding core in a peripheral surface of the winding core; preparing a wound body by winding strip-shaped positive and negative electrodes along with the strip-shaped separator around the winding core; and preparing an electrode body by releasing the suction in the holes and pulling out the winding core from the wound body, in which the battery includes a battery container configured to accommodate the electrode body, the holes are communicated inside with the winging core having a hollow structure, and the winding core has an outside diameter of 2 mm or less.

Abstract: An electrode capable of preventing variations in electrical performance to stabilize performance and improve yields is provided. An electrode structure includes: an electrode including an current collector and an active material layer arranged on the current collector; and an electrode lead arranged on the active material layer, wherein a hole is arranged so as to penetrate the electrode and the electrode lead, and the electrode and the electrode lead are folded back around the hole in a direction away from the hole so that the electrode is placed inside, and the thickness of the active material layer in a region where the electrode lead is not arranged is uniform, and the thickness of the active material layer in a region where the electrode lead is arranged is nonuniform.

Abstract: A telephone connection control method for performing connection control by using a telephone connection control server having a telephone connection control function having a software telephone exchange function, connecting to plural kinds of telephone networks and being capable of switching plural kinds of telephone communication lines, the method comprising steps of: assigning a user number to a telephone user using the telephone connection control server and handling the user number as a virtual telephone number; assigning a telephone terminal number different from a real telephone number to a telephone terminal connecting to the telephone connection control server; receiving from the telephone user the registration of a current position number associating the telephone terminal number of the telephone terminal that the user is going to use and a virtual telephone number corresponding to the user number and registering it with a database rewritably by the telephone connection control server; and, using, on

Abstract: An electrode capable of preventing variations in electrical performance to stabilize performance and improve yields is provided. An electrode structure includes: an electrode including an current collector and an active material layer arranged on the current collector; and an electrode lead arranged on the active material layer, wherein a hole is arranged so as to penetrate the electrode and the electrode lead, and the electrode and the electrode lead are folded back around the hole in a direction away from the hole so that the electrode is placed inside, and the thickness of the active material layer in a region where the electrode lead is not arranged is uniform, and the thickness of the active material layer in a region where the electrode lead is arranged is nonuniform.

Abstract: A camera having an autofocus function, independent of a photographing optical system, includes a photographing optical system including synthetic resin lenses and an autofocus optical system, provided independent of the photographing optical system, having at least one synthetic resin lens and a stop decentered in a direction perpendicular to the optical axis of the synthetic resin lens. Thus, in the camera, the shift of the imaging position of the photographing optical system which is caused by an ambient temperature or humidity change is favorably corrected, and good photography can be performed.

Abstract: A camera having an autofocus function, independent of a photographing optical system, includes a photographing optical system including synthetic resin lenses and an autofocus optical system, provided independent of the photographing optical system, having at least one synthetic resin lens and a stop decentered in a direction perpendicular to the optical axis of the synthetic resin lens. Thus, in the camera, the shift of the imaging position of the photographing optical system which is caused by an ambient temperature or humidity change is favorably corrected, and good photography can be performed.

Abstract: A compact yet high-performance zoom lens system which is well corrected in terms of aberrations, includes reduced number of lens elements and has a reduced total lens thickness. The system has a first lens group G1 including, in order from the object side, a lens having a meniscus shape convex on the object side and negative refracting power (first lens), a lens of weak refracting power (second lens) and a lens having positive refracting power together with at least one aspheric surface (third lens). The first lens group has a positive refracting power in its entirety. The system further has a second lens group G2, the focal length of the overall system being variable by varying an axial separation between the first and second lens groups G1 and G2, and conforms to the following condition: (1) relation to the refracting power range of the lens of weak refracting power and the following condition (2) relating to the axial position of the lens of weak refracting power:-0.35<f.sub.W /f.sub.LW <0.9 (1)0.

Abstract: A zoom lens system comprising, in order from the object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, a stop, a fourth lens unit having a positive refractive power and a fifth lens unit having a positive refractive power; and configured to be zoomed from a wide position to a tele position thereof by moving the second lens unit and the third lens unit so as to widen an airspace reserved therebetween, and moving the third lens unit and the fourth lens unit so as to narrow an airspace reserved therebetween with the first lens unit kept stationary. This zoom lens system has a field angle of 75.degree. at the wide position, a vari-focal ratio as high as 8, a compact size and high imaging performance.

Abstract: A zoom lens comprising, in the order from the object side, a front lens group including a variator lens unit with a negative refractive power; an aperture stop; and a rear lens group arranged behind the aperture stop. The rear lens group includes a lens unit having a positive refractive power, a focusing lens unit having a negative refractive power, and a compensator lens unit having a positive refractive power. At the time of zooming, the lens unit having the positive refractive power moves together with the focusing lens unit, and at the time of focusing, only the focusing lens unit moves separately from the lens unit having the positive refractive power.

Abstract: A wide-angle variable focal length lens system comprising a first lens unit which is to be kept stationary for varying a focal length of the variable focal lens system and composed of a single positive lens component, a second lens unit which comprises at least one positive lens component and has a negative refractive power as a whole, a stop, and a third lens unit having a positive refractive power; and configured so as to perform variation of a focal length of the lens system and adjustment of an image location by moving the second lens unit and the third lens unit along an optical axis in directions which are opposite to each other. This variable focal length lens system has a field angle of 64.degree. to 74.degree. at a wide position thereof, a variable focal length ratio of 3 to 3.3 and an F number on the order of 2, and comprises a small number of lens components.

Abstract: A vari-focal lens system comprising, in order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power and a fourth lens unit having a positive refractive power; and configured so as to be set at a focal length at a telephoto position thereof from that at a wide-angle position thereof by moving the first lens unit monotonically toward the object side, displacing the second lens unit monotonically toward the image side, setting the third lens unit at a location on the object side of its original setting at the wide-angle position and moving the fourth lens unit from a location thereof to focus the vari-focal lens system on an object effectively located at infinite distance so as to widen an airspace reserved between the third lens unit and the fourth lens unit as compared to the airspace at the wide-angle position.

Abstract: A zoom lens system comprising, in order from the object side, a first lens unit which has a positive refractive power and is kept fixed during zooming, a second lens unit which has a negative refractive power, is movable for zooming and has a vari-focal function, a third lens unit which has a positive refractive power and is movable for zooming, and a fourth lens unit which has a positive refractive power and is movable for zooming; a location of the third lens unit at a tele position of the zoom lens system being on the object side of a location of the third lens unit at a wide position of the zoom lens system. This zoom lens system consists of a small number of lens components, and has a vari-focal ratio of 9 to 12 and a wide field angle of 65.degree. to 68.degree. at the wide position thereof.

Abstract: A zoom lens system having a field angle of about 44.degree. to 47.degree. at the wide angle end, a zoom ratio of about 2.6 to 3 and an F-number on the order of 2.8, which is reduced in value while making sure of a back focus and which is improved in terms of its capability to form images. The zoom lens system includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power and a fourth lens group consisting of three lens elements and having a positive refractive power as a whole, the second and third lens groups being movable for zooming.

Abstract: The present invention relates to a small zoom lens system for electronic still cameras or video cameras, which has a zoom ratio lying in the range of about 2.5-3.2 and an F-number lying in the range of about 2-2.8, comprises as small as 7 or 8 lenses and is reduced in terms of both the total length and the lens diameter, and which is characterized by comprising, in order from the object side, at least a first lens group having a positive refractive power, a second lens group having a negative refractive power, a stop and a third lens group having a positive refractive power, and in that during zooming the first lens group remains fixed while the second and third lens groups are moved along the optical axis, and the following conditions (1) and (2) are satisfied:0.9.times..beta..sub.2T /.beta..sub.2W <.beta..sub.3T /.beta..sub.3W <2.0.times..beta..sub.2T /.beta..sub.2W, (1),and0.5<f.sub.3 /.vertline.f.sub.2 .vertline.<1.5, (2)where.beta..sub.

Abstract: The invention relates to a compact, lightweight and inexpensive zoom lens system which, even when used with a small image sensor, allow the convex lenses to have a sufficient peripheral thickness and the concave lenses to have a sufficient central thickness and which comprises, in order from the object side, a first unit having a positive refracting power, a second unit having a negative and being movable during zooming, a third unit having a positive refracting power and remaining fixed in place and a fourth unit having a positive refracting power and being movable during zooming and focusing; said third unit comprising, in order from the object side, two lenses in all, one being a positive lens having a strong curvature on the object side and the other a negative lens having a strong curvature on the image side, and said third and fourth units each having at least one aspherical surface whose refracting power decreases as it is spaced away from the optical axis and conforming to the following conditions (1)