Abstract: A focus adjustment method of a zoom lens system is provided for correcting a focal point shift caused by manufacturing error. The zoom lens system includes three movable lens groups in which at least two of said lens groups are moved to perform zooming to form an image onto an imaging device. In the zoom lens system, a finite number of focal length positions at which a focus adjustment is performed is provided. The lens group closest to the imaging device out of the three lens groups includes a focusing lens group. A position of the focusing lens group is controlled via pulses of a stepping motor. The focus adjustment method includes the combination of performing the above control of the focusing lens group to determine a position of the focusing lens group via pulses of the stepping motor and determining an amount of adjustment of the imaging device.

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Each of the negative first lens group, the positive second lens group and the positive third lens group moves along the optical axis upon zooming. The positive second lens group includes a positive first lens element, a negative second lens element, and a negative third lens element, in this order from the object. The zoom lens system satisfies the following conditions: 2<f2/rb<3 ??(1) 0.4<f2/f3<0.8 ??(2) wherein f2 designates the focal length of the positive second lens group; f3 designates the focal length of the positive third lens group; and rb designates the radius of curvature of the image-side surface of the negative third lens element of the positive second lens group.

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group. Upon zooming from the short focal length extremity to the long focal length extremity, each of the first to third lens groups move along the optical axis. The first lens group includes a negative first sub-lens element, a second sub-lens element having a negative and weak refractive power and at least one aspherical surface, and a positive third sub-lens element. The zoom lens system satisfies the following condition: 0.5<(ra?rb)/(ra+rb)<1.2 ??(1) wherein ra designates the radius of curvature of the object-side surface of the second sub-lens element; and rb designates the radius of curvature of the image-side surface of the second sub-lens element.

Abstract: A wide-angle zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, at least the first lens group, the second lens group and the third lens group move along the optical axis direction so that the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group increases. The wide-angle zoom lens system satisfies the following conditions: ?0.7<fw/f2<?0.5??(1) 0.4<X1/ft<0.

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The negative first lens group includes a negative first lens element, a negative second lens element having a weaker negative refractive power, and a positive third lens element, in this order from the object. The second lens element of the negative first lens group satisfies the following condition: 0<(ra?rb)/(ra+rb)<0.

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The negative first lens group includes a negative first lens element, a positive or negative lens element having a weaker refractive power, and a positive third lens element, in this order from the object. The zoom lens system satisfied the following condition: ?0.25<f1/fp<0.25(f1<0) ??(1) wherein f1 designates the focal length of the negative first lens group; and fp designates the focal length of the positive second lens element.

Abstract: It is intended to provide an aqueous solution of a thermoresponsive polymer and an aqueous dispersion of a thermoresponsive particle, which show an upper critical solution temperature (UCST) and are capable of maintaining a dissolved state and a dispersed state, respectively, even if they are stored for a long period of time at a temperature at which a ligand such as an antibody or an antigen is not inactivated. A UCST lowering agent is incorporated in a predetermined amount in an aqueous solution of a thermoresponsive polymer which shows a UCST in a state of containing water or an aqueous dispersion of a thermoresponsive particle containing the polymer, thereby lowering the UCST of the aqueous solution or aqueous dispersion to less than the storage temperature, and the resulting aqueous solution or aqueous dispersion is stored.

Abstract: A wide-angle zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, at least the first lens group, the second lens group and the third lens group move along the optical axis direction so that the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group increases. The wide-angle zoom lens system satisfies the following conditions: ?0.7<fw/f2<?0.5 ??(1) 0.4<X1/ft<0.

Abstract: A standard zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The negative first lens group includes a negative lens element and a positive lens element, in this order from the object. The most image-side surface of the positive second lens group is a concave surface. The standard zoom lens system satisfies the following condition: 0.15<Rs/fT<0.

Abstract: A solid-state image pickup device including a substrate having a first face and a second face which serves as an opposite face of the first face; a solid-state image pickup element having a plurality of electrodes and a light sensing part, an opposite face of the light sensing part being bonded to the first face via a bonding agent; a plurality of wires formed over the face, first ends of the wires serving as external electrode terminals; and a connection part for electrically connecting the electrodes to the wires, wherein an endless-shaped contraction frame formed of resin larger in thermal expansion coefficient than the substrate and image pickup element is bonded to and formed on surface of the substrate located outside the light sensing part so as to surround the light sensing part, and a light sensing face of the light sensing part is warped.

Abstract: A material which expresses its critical solution temperature even in an aqueous solution containing a buffer or salt, and at the same time, shows small variation width of the critical solution temperature even when concentration of salt or the like contained in water, a buffer liquid or the like is different, interacts with a substance such as a component in the living body and can therefore be used efficiently in the isolation of substances, is provided. A monomer represented by a formula (1) and a thermoresponsive polymer which contains said monomer as a polymerization component.

Abstract: A zoom lens system includes a negative first lens group which is stationary or movable, a positive second lens group which is movable, and a positive third lens group which is movable, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, a distance between the negative first lens group and the positive second lens group decreases, and a distance between the positive second lens group and the positive third lens group increases. The zoom lens system satisfies the following conditions: 0.3<fw/|f1|<0.65(f1<0)??(1) 0.6<fw/f2<1.2??(2) 0.3<fw/f3<0.6??(3) wherein fw designates the focal length of the entire zoom lens system at the short focal length extremity; and fi designates the focal length of the ith lens group (i=1, 2, 3).

Abstract: A zoom lens system includes a movable positive first lens group, a movable negative second lens group, a movable positive third lens group, and movable stationary or positive fourth lens group. Upon zooming, the distance between the first and second lens groups is increased; the distance between the second and the third lens groups is decreased; and the distance between the third and the fourth lens groups is increased.

Abstract: A zoom lens system includes a positive first lens group, a positive second lens group, a diaphragm, and a negative third lens group. The first through third lens groups move in an optical axis direction for zooming. The positive first lens group includes a negative lens element, and at least one positive lens element. The negative lens element is positioned at the most object-side of the positive first lens group, and is provided with a concave surface on the object-side surface thereof. The zoom lens system satisfies a number of specified conditions.

Abstract: A zoom lens system includes at least three lens groups. Zooming is performed by moving at least two lens groups. The first lens group and the second lens group are formed as the focus-adjusting lens groups which are movable in the optical-axis direction for performing the narrower zoom adjustment when the zoom lens system is being assembled. The focus-adjusting lens groups satisfy the following condition: 0.4<{K1(L)?K1(S)}/{K2(L)?K2(S)}<1.6??(1) wherein K1(L) designates the focus sensitivity of the first lens group at the long focal length extremity; K1(S) designates the focus sensitivity of the first lens group at the short focal length extremity; K2(L) designates the focus sensitivity of the second lens group at the long focal length extremity; and K2(S) designates the focus sensitivity of the second lens group at the short focal length extremity.

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group. Upon zooming from the short to long focal length extremities, the distance between the first and second lens groups decreases, and the distance between the second and third lens groups increases. The zoom lens system satisfies the following conditions: 0.4<(fw·ft)1/2/|f1|<0.8(f1<0)??(1) 0.7<(fw·ft)1/2/f2<1.4??(2) 0.4<(fw·ft)1/2/f3<0.9??(3) wherein fw and ft designate the focal lengths of the entire zoom lens system at the short and long focal length extremities, respectively; and fi designates the focal length of the ith lens group (i=1˜3).

Abstract: A zoom lens system, covering a wide-angle range, includes a negative first lens group, a positive second lens group, and a negative third lens group. Zooming is performed by varying the distances between the first to third lens groups, and the zoom lens system satisfies the following conditions: 1.9<|(fw*ft)1/2/f1|<2.9(f1<0)??(1) 1.0<f12t/f12w<1.8??(2) wherein fw and ft designate the focal length of the entire zoom lens system, respectively, at the short focal length extremity and the long focal length extremity; f1 designates the focal length of the negative first lens group; f12w and f12t designate the combined focal length of the negative first lens group and the positive second lens group, respectively, at the short focal length extremity and the long focal length extremity.

Abstract: A zoom lens system includes a negative first lens group which is stationary or movable, a positive second lens group which is movable, and a positive third lens group which is movable, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, a distance between the negative first lens group and the positive second lens group decreases, and a distance between the positive second lens group and the positive third lens group increases. The zoom lens system satisfies the following conditions: 0.3<fw/|f1|<0.65(f1<0)??(1) 0.6<fw/f2<1.2??(2) 0.3<fw/f3<0.6??(3) wherein fw designates the focal length of the entire zoom lens system at the short focal length extremity; and fi designates the focal length of the ith lens group (i=1, 2, 3).

Abstract: A zoom lens system includes a movable-positive first lens group, a movable-negative second lens group, a movable-positive third lens group, and a movable-positive fourth lens group. Upon zooming from the short to the long focal length extremities, all the lens groups are arranged to move in a manner that the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, the distance between the third lens group and the fourth lens group increases, and the distance between the first lens group and the third lens group does not change. Upon zooming from the short to the long focal length extremities, the fourth lens group first moves toward the image and thereafter moves toward the object in a U-turn path.

Abstract: A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a negative fourth lens group. Zooming is performed by moving each of the lens groups along the optical axis.