Abstract: There is provided a non-oriented electrical steel sheet in which, in a cross section of a base material in a sheet thickness direction, the number density N2-5 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range of 2.0 to 5.0 ?m from the surface of the base material in the sheet thickness direction is 0.30 pieces/?m2 or less, and the relationship between the number density N2-5 and the number density N0-2 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range from the surface of the base material to 2.0 ?m satisfies Formula (1): (N2-5)/(N0-2)?0.5??Formula (1).

Abstract: A zoom optical system includes a positive first lens group, a negative second lens group disposed on an image side of the first lens group, a positive third lens group disposed on an image side of the second lens group, a negative fourth lens group disposed on an image side of the third lens group, and a final lens group disposed on an image side of the fourth lens group and closest to an image. During zooming, distances between lens groups change, and the first lens group moves along an optical axis. A negative focusing lens group is provided, and the final lens group is disposed on an image side of the focusing lens group. A negative vibration proof group of the second lens group may include, in order from an object, a negative lens, an air gap and a cemented lens of a negative lens and a positive lens. The final lens group may have negative refractive power.

Abstract: There is provided a non-oriented electrical steel sheet in which, in a cross section of a base material in a sheet thickness direction, the number density N2-5 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range of 2.0 to 5.0 ?m from the surface of the base material in the sheet thickness direction is 0.30 pieces/?m2 or less, and the relationship between the number density N2-5 and the number density N0-2 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range from the surface of the base material to 2.0 ?m satisfies Formula (1): (N2-5)/(N0-2)?0.5??Formula (1).

Abstract: Provided is a variable power optical system (ZL) used for an optical apparatus such as a camera (1). The variable power optical system (ZL) includes, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having negative refractive power; a fourth lens group having positive refractive power; and a fifth lens group. Upon zooming from a wide-angle end state to a telephoto end state, a distance between each of the lens groups changes, and upon focusing from an object at infinity to an object at a close distance, the third lens group moves in the optical axis direction.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2); a third lens group (G3); a fourth lens group (G4) having a negative refractive power; and a fifth lens group (G5) having a positive refractive power, the system performing varying magnification by changing the distance between the first and second lens groups, the distance between the second and third lens groups, the distance between the third and fourth lens groups, and the distance between the fourth and fifth lens groups, and the fourth lens group including a 42nd lens group (G42) configured to be movable so as to have a component in a direction orthogonal to an optical axis and a 41st lens group (G41) disposed at an object-side of the 42nd lens group.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2) having a positive refractive power; a third lens group (G3) having a negative refractive power; and a fourth lens group (G4) having a positive refractive power. The system performs varying magnification by changing the distance between the first lens group and the second lens group, the distance between the second lens group and the third lens group, and the distance between the third lens group and the fourth lens group. The third lens group includes a 32nd lens group (G32) configured to be movable so as to have a component in a direction orthogonal to an optical axis in order to correct image blur as a vibration-reduction lens group (VR) and a 31st lens group (G31) disposed at an object-side of the 32nd lens group. The 32nd lens group has negative refractive power, and the system satisfies Conditional Expression (1) below. 0.200<f1/f3<0.

Abstract: A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive lens component, wherein a distance between the first lens group (G1) and the lens group (G3) having the positive lens component changes during zooming, at least one lens surface of the positive lens component has an aspherical surface, and the following conditional expression, 0.40<fp/fGp<3.60 is satisfied, where fp: a focal length of the positive lens component, and fGp: a focal length of the lens group (G3) having the positive lens component.

Abstract: A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive lens component, wherein a distance between the first lens group (G1) and the lens group (G3) having the positive lens component changes during zooming, at least one lens surface of the positive lens component has an aspherical surface, and the following conditional expression, 0.40<fp/fGp<3.60 is satisfied, where fp: a focal length of the positive lens component, and fGp: a focal length of the lens group (G3) having the positive lens component.

Abstract: A zoom optical system (ZL) comprises a first negative lens group (G2) having a negative refractive power; and a second negative lens group (G4) disposed closer to an image than the first negative lens group (G2), wherein a distance between the first negative lens group (G2) and the second negative lens group (G4) changes during zooming, at least part of the first negative lens group (G2) is movable so as to have a displacement component in a direction perpendicular to an optical axis, at least part of the second negative lens group (G4) is movable along the optical axis during focusing, and the following conditional expression, 0.50<fGb/fGa<2.60 is satisfied, where, fGa: a focal length of the first negative lens group (G2), and fGb: a focal length of the second negative lens group (G4).

Abstract: A zoom optical system (ZL) comprises a first negative lens group (G2) having a negative refractive power; and a second negative lens group (G4) disposed closer to an image than the first negative lens group (G2), wherein a distance between the first negative lens group (G2) and the second negative lens group (G4) changes during zooming, at least part of the first negative lens group (G2) is movable so as to have a displacement component in a direction perpendicular to an optical axis, at least part of the second negative lens group (G4) is movable along the optical axis during focusing, and the following conditional expression, 0.50<fGb/fGa<2.60 is satisfied, where, fGa: a focal length of the first negative lens group (G2), and fGb: a focal length of the second negative lens group (G4).

Abstract: Provided is a variable power optical system (ZL) used for an optical apparatus such as a camera (1). The variable power optical system (ZL) includes, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having negative refractive power; a fourth lens group having positive refractive power; and a fifth lens group. Upon zooming from a wide-angle end state to a telephoto end state, a distance between each of the lens groups changes, and upon focusing from an object at infinity to an object at a close distance, the third lens group moves in the optical axis direction.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2); a third lens group (G3); a fourth lens group (G4) having a negative refractive power; and a fifth lens group (G5) having a positive refractive power, the system performing varying magnification by changing the distance between the first and second lens groups, the distance between the second and third lens groups, the distance between the third and fourth lens groups, and the distance between the fourth and fifth lens groups, and the fourth lens group including a 42nd lens group (G42) configured to be movable so as to have a component in a direction orthogonal to an optical axis and a 41st lens group (G41) disposed at an object-side of the 42nd lens group.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2) having a positive refractive power; a third lens group (G3) having a negative refractive power; and a fourth lens group (G4) having a positive refractive power. The system performs varying magnification by changing the distance between the first lens group and the second lens group, the distance between the second lens group and the third lens group, and the distance between the third lens group and the fourth lens group. The third lens group includes a 32nd lens group (G32) configured to be movable so as to have a component in a direction orthogonal to an optical axis in order to correct image blur as a vibration-reduction lens group (VR) and a 31st lens group (G31) disposed at an object-side of the 32nd lens group. The 32nd lens group has negative refractive power, and the system satisfies Conditional Expression (1) below. 0.200<f1/f3<0.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2); a third lens group (G3); a fourth lens group (G4) having a negative refractive power; and a fifth lens group (G5) having a positive refractive power, the system performing varying magnification by changing the distance between the first and second lens groups, the distance between the second and third lens groups, the distance between the third and fourth lens groups, and the distance between the fourth and fifth lens groups, and the fourth lens group including a 42nd lens group (G42) configured to be movable so as to have a component in a direction orthogonal to an optical axis and a 41st lens group (G41) disposed at an object-side of the 42nd lens group.

Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2) having a positive refractive power; a third lens group (G3) having a negative refractive power; and a fourth lens group (G4) having a positive refractive power. The system performs varying magnification by changing the distance between the first lens group and the second lens group, the distance between the second lens group and the third lens group, and the distance between the third lens group and the fourth lens group. The third lens group includes a 32nd lens group (G32) configured to be movable so as to have a component in a direction orthogonal to an optical axis in order to correct image blur as a vibration-reduction lens group (VR) and a 31st lens group (G31) disposed at an object-side of the 32nd lens group. The 32nd lens group has negative refractive power, and the system satisfies Conditional Expression (1) below. 0.200<f1/f3<0.

Abstract: An object is to provide a high insect control effect on larvae of stored grain insect pests that occur in a deposit of grain powder, which have been difficult to control by conventional insecticide application or fumigant treatment, and make it possible to easily carry out control even in places that are difficult to clean to remove grain powder. A three-dimensional insect control sheet (10) contains an insect growth regulator at least in a front surface (1a) and has a three-dimensional surface that forms a structure with an irregular profile. The front surface (1a) is at least part of the surface with the irregular profile.

Abstract: In an optical system (ZL) capable of imaging in a plurality of object side media (for instance, air and water) whose refractive indexes are different from each other, the optical system is composed of, in order from an object, a front lens group (G1) whose position in an optical axis fixed, and a rear lens group (for instance, G2 to G4), and the rear lens group comprises at least two moving lens groups (for instance, G2 and G3), and at least two moving lens groups in the rear lens group are moved along the optical axis upon changing between object side media.

Abstract: A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive lens component, wherein a distance between the first lens group (G1) and the lens group (G3) having the positive lens component changes during zooming, at least one lens surface of the positive lens component has an aspherical surface, and the following conditional expression, 0.40<fp/fGp<3.60 is satisfied, where fp: a focal length of the positive lens component, and fGp: a focal length of the lens group (G3) having the positive lens component.

Abstract: A zoom optical system (ZL) comprises a first negative lens group (G2) having a negative refractive power; and a second negative lens group (G4) disposed closer to an image than the first negative lens group (G2), wherein a distance between the first negative lens group (G2) and the second negative lens group (G4) changes during zooming, at least part of the first negative lens group (G2) is movable so as to have a displacement component in a direction perpendicular to an optical axis, at least part of the second negative lens group (G4) is movable along the optical axis during focusing, and the following conditional expression, 0.50<fGb/fGa<2.60 is satisfied, where, fGa: a focal length of the first negative lens group (G2), and fGb: a focal length of the second negative lens group (G4).

Abstract: A grease composition for rolling bearing comprising a metal soap-based thickening agent containing a long fiber-like material having a major axis length of at least 3 ?m incorporated in a base oil comprising a lubricant having a polar group in its molecular structure and a non-polar lubricant blended in combination.