Abstract: A load detection device includes: a load sensor including at least one first electrode, at least one second electrode disposed so as to cross the first electrode, and a dielectric body present between the first electrode and the second electrode; a detection circuit configured to detect change in a voltage in a crossing position between the first electrode and the second electrode; a connector configured to connect the first electrode and the second electrode to the detection circuit; and a control circuit configured to control the detection circuit, and configured to detect a load applied at the crossing position, based on change in a voltage detected by the detection circuit. The control circuit executes control of detecting a combination of, out of the plurality of terminals of the connector, the terminals to which the first electrode and the second electrode are respectively connected.

Abstract: A load sensor includes: a first base member having a plate shape and having elasticity; a second base member having a plate shape and disposed so as to oppose the first base member; an electrically-conductive elastic body formed on an opposing face of the first base member; an electrically-conductive member having a linear shape and disposed between the first base member and the second base member; a dielectric body formed on an outer periphery of the electrically-conductive member; and an electric conductor formed on the second base member, along the electrically-conductive member.

Abstract: A temperature measuring device includes first and second semiconductor elements each of which has a p-n junction, a transistor group including a plurality of transistors of which respective sources are connected to a power source and of which respective gates are connected to each other, the plurality of transistors constituting a current source, the transistor group being configured to output a first current and a second current having a different magnitude from the first current to the first and second semiconductor elements, respectively, and a selector configured to select at least one first transistor and a plurality of second transistors different from the first transistor, from among the plurality of transistors.

Abstract: A temperature measuring device includes first and second semiconductor elements each of which has a p-n junction, a transistor group including a plurality of transistors of which respective sources are connected to a power source and of which respective gates are connected to each other, the plurality of transistors constituting a current source, the transistor group being configured to output a first current and a second current having a different magnitude from the first current to the first and second semiconductor elements, respectively, and a selector configured to select at least one first transistor and a plurality of second transistors different from the first transistor, from among the plurality of transistors.

Abstract: In a first sensing state in which a first current flows in a forward direction with respect to a pn junction of a first semiconductor element and a second current of a different magnitude from the first current flows in a forward direction with respect to a pn junction of a second semiconductor element, a difference between a forward direction voltage of the pn junction of the first semiconductor element and a forward direction voltage of the pn junction of the second semiconductor element is converted into a digital value by a computer and acquired as a first digital value.

Abstract: In a first sensing state in which a first current flows in a forward direction with respect to a pn junction of a first semiconductor element and a second current of a different magnitude from the first current flows in a forward direction with respect to a pn junction of a second semiconductor element, a difference between a forward direction voltage of the pn junction of the first semiconductor element and a forward direction voltage of the pn junction of the second semiconductor element is converted into a digital value by a computer and acquired as a first digital value.

Abstract: A zoom lens includes, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a fourth lens unit having positive refractive power. All of the lens units are moved during zooming from a wide-angle end to a telephoto end. An aperture stop is arranged on the image side of the third lens unit. A distance T23 from a lens surface closest to the image side in the second lens unit to a lens surface closest to the object side in the third lens unit when the zoom lens is at the telephoto end, a focal length fT of the entire zoom lens at the telephoto end, and focal lengths f1, f2, and f3 of the first, second, and third lens units, respectively, are set based on predetermined mathematical conditions.

Abstract: A zoom lens includes, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a fourth lens unit having positive refractive power. All of the lens units are moved during zooming from a wide-angle end to a telephoto end. An aperture stop is arranged on the image side of the third lens unit. A distance T23 from a lens surface closest to the image side in the second lens unit to a lens surface closest to the object side in the third lens unit when the zoom lens is at the telephoto end, a focal length fT of the entire zoom lens at the telephoto end, and focal lengths f1, f2, and f3 of the first, second, and third lens units, respectively, are set based on predetermined mathematical conditions.

Abstract: A zoom lens performs zooming by moving a plurality of lens units, and includes a front lens unit disposed on an object side of an aperture stop and at least one diffractive optical part having positive power, and a rear lens unit disposed on an image side of the aperture stop including at least one refractive optical element made of a solid material and having a positive refractive power. When ?d and ?gF are the Abbe number and the partial dispersion ratio, respectively, of the material of the refractive optical element, and fD and fN are the focal lengths of the diffractive optical part and the refractive optical element, respectively, in air, the following expressions are satisfied: 0.755<?gF?(?1.665×10?7·?d3+5.213×10?5·?d2?5.656×10?3·?d)<1.011, and 80<fD/fN<800.

Abstract: An inner portion of a filter cleaning portion 300 arranged at an inner portion of an interior unit is respectively arranged with cleaning units 300A, 300B constituted by arranging upper brushes 344a, 344b brought into contact with one face of an air filter and lower brushes 322a, 322b brought into contact with other face of the air filter 5 opposedly to each other at filter inlet/outlet 350a, 350b of the filter cleaning portion 300. Further, a longitudinal frame 54 and a transverse frame 55 of an air filter 5 having a filter sheet 51 in a shape of a meshed sheet for catching dust and a frame 52 for supporting the filter sheet 51 are formed on a rear face side (side of heat exchanger 3) of the filter sheet 51.

Abstract: A compact zoom lens includes a first lens unit disposed closest to an object side, an aperture, and a rear lens group. The first lens unit includes a first diffraction optical part having positive refractive power, and the rear lens group includes a second diffraction optical part having positive refractive power. The power relation between the two diffraction optical parts and the positions of the diffraction optical parts are set appropriately. The zoom lens can have a high zoom ratio wherein chromatic aberration is fully corrected, and an image pickup apparatus employing this zoom lens can be provided.

Abstract: At least one exemplary embodiment is directed to a zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and an image-side lens unit in order from an object side to an image side wherein an interval between the first lens unit and the second lens unit varies during zooming, the first lens unit includes an optical element having a positive refractive power and made of a solid material having an Abbe number (?d) and a relative partial dispersion (?gF) satisfying the following conditions: 0.755?gF?(?1.665×10?7·?d3+5.213×10?5·?d2?5.656×10?3·?d)<1.011 and 1.6<(ft/f1)2<5.6, wherein f1is the focal length of the first lens unit and ft is the focal length of the zoom lens at a telephoto end.

Abstract: A zoom lens system is disclosed which comprises in order from an object side to an image side: a first lens unit with a positive optical power (inverse of the focal length), a second lens unit with a negative optical power; and one or more lens units; and with which at least one of the first lens unit and the second lens unit is moved during zooming. By specifying the optical characteristics (shape, material, focal length, etc.) of the lens elements making up the second lens unit in the zoom lens system, a high zoom ratio is obtained with a simple arrangement, and an optical system, which can adequately accommodate even the use of a solid-state image pickup element with a large number of pixels, is realized.

Abstract: A zoom lens, including, in order from an object side to an image side (a) a first lens unit of negative optical power, (b) a second lens unit of positive optical power, and (c) a third lens unit of positive optical power, wherein a separation between the first lens unit and the second lens unit and a separation between the second lens unit and the third lens unit are varied to effect variation of magnification, and wherein the zoom lens satisfies the following conditions: ndp3<1.5 and ?dp3>70.0, where ndp3 and ?dp3 are a refractive index and Abbe number, respectively, of material of the positive lens in the third lens unit.

Abstract: A compact zoom lens includes a first lens unit disposed closest to an object side, an aperture, and a rear lens group. The first lens unit includes a first diffraction optical part having positive refractive power, and the rear lens group includes a second diffraction optical part having positive refractive power. The power relation between the two diffraction optical parts and the positions of the diffraction optical parts are set appropriately. The zoom lens can have a high zoom ratio wherein chromatic aberration is fully corrected, and an image pickup apparatus employing this zoom lens can be provided.

Abstract: At least one exemplary embodiment is directed to a zoom lens system, which includes, in order from an object side to an image side, a first lens unit of positive optical power, a second lens unit of negative optical power, a third lens unit of positive optical power, and a fourth lens unit of positive optical power. During zooming, each of the lens units moves.

Abstract: A zoom lens performs zooming by moving a plurality of lens units, and includes a front lens unit disposed on an object side of an aperture stop and at least one diffractive optical part having positive power, and a rear lens unit disposed on an image side of the aperture stop including at least one refractive optical element made of a solid material and having a positive refractive power. When ?d and ?gF are the Abbe number and the partial dispersion ratio, respectively, of the material of the refractive optical element, and fD and fN are the focal lengths of the diffractive optical part and the refractive optical element, respectively, in air, the following expressions are satisfied: 0.755<?gF?(?1.665×10?7·?d3+5.213×10?5·?d2?5.656×10?3·?d)<1.011, and 80<fD/fN<800.

Abstract: At least one exemplary embodiment is directed to a zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and an image-side lens unit in order from an object side to an image side. An interval between the first lens unit and the second lens unit varies during zooming. The first lens unit includes an optical element having a positive refractive power and made of a solid material having an Abbe number (?d) and a relative partial dispersion (?gF) satisfying the following condition: 0.755<?gF?(?1.665×10?7·?d3+5.213×10?5·?d2?5.656×10?3·?d)<1.011. A focal length of the first lens unit (f1) and a focal length of the zoom lens at a telephoto end (ft) satisfy the following condition: 1.6<(ft/f1)2<5.6.

Abstract: At least one exemplary embodiment is directed to a four-group zoom lens system including, in order from the object side to the image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power and including a negative first lens sub-unit and a positive second lens sub-unit in order from the object side to the image side, and a fourth lens unit having positive refractive power. During zooming, the second and fourth lens units can be moved along an optical axis and the second lens sub-unit can be moved substantially orthogonal to the optical axis. When f1 represents the focal length of the first lens unit, f3a and f3b represents the focal length of the first and second lens sub-units, respectively, satisfy 0.4<f3b/f1<0.70 and 0.5<|f3b/f3a|<0.8.

Abstract: A zoom lens, comprising, in order from an object side to an image side: (a) a first lens unit of negative optical power; (b) a second lens unit of positive optical power; and (c) a third lens unit of positive optical power, wherein a separation between the first lens unit and the second lens unit and a separation between the second lens unit and the third lens unit are varied during zooming, and wherein, during zooming from a wide-angle end to a telephoto end, the first lens unit moves so that its motion comprises (a) moving toward the image side and (b) moving thereafter toward the object side, and the third lens unit moves so that its motion comprises (a) moving toward the image side and (b) moving thereafter toward the object side.