Abstract: A zoom lens system capable of correcting a secondary spectrum is disclosed. The zoom lens system includes a first lens unit with a positive optical power, a second lens unit with a negative optical power, an aperture stop, and a rear lens component including at least one lens unit in an order from an object side to an image side. In the zoom lens system, during zooming from a wide angle end to a telephoto end, an interval between the first lens unit and the second lens unit increases, and an interval between the second lens unit and the aperture stop decreases. Then, a material satisfying the following conditions: ?d1n<35 ?gF1n<?0.0027?d1n+0.680 is used for the negative lens in the first lens unit. Herein, ?d1n represents an Abbe number, and ?gF1n represents a partial dispersion ratio.

Abstract: The zoom lens has, in order from the object to image sides, 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, wherein the second lens unit and the fourth lens unit move during zooming. The following condition is satisfied: ?23<20.0, N23>1.9, ?1.0<f2/f2t<?0.05, where f2 represents a focal length of the second lens unit, ft represents a focal length of the entire system at a telephoto end zoom position, and ?23 and N23 represent an Abbe number and a refractive index of the material forming the third lens of the second lens unit, respectively.

Abstract: A zoom lens system including, in order from an object side to an image side, a first lens unit of positive optical power, and a second lens unit of negative optical power, followed by a lens component having a lens unit, wherein at least one of the first lens unit and the second lens unit moves during zooming. One of the lens units of the zoom lens system includes a layer made of a material that satisfies the following conditions: 11<?IT<27 0.2<?IT<0.4. Wherein ?IT is an Abbe number of the layer, and ?IT is a partial dispersion ratio for the g-spectral line and f-spectral line of the layer. The layer has an optical power of a sign opposite to that of the lens unit including the layer.

Abstract: Provided are a zoom lens that provides optical performance sufficiently high for applications that use a solid-state image pickup element of a simple construction having a high magnification ratio and high-density pixel integration, and an image pickup apparatus having the zoom lens. The zoom lens has, in order from the object to image sides, 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, the second lens unit and the fourth lens unit moving during zooming.

Abstract: A zoom lens system is disclosed, in which the decrease of the peripheral light quantity at the wide-angle end is improved. The zoom lens system comprises, in order from an object side to an image side, a first lens unit having a positive optical power, a second lens unit having a negative optical power, an aperture stop, a third lens unit having a positive optical power and a fourth lens unit having a positive optical power. The four lens units and the aperture stop are moved during zooming. When MS represents movement amount of the aperture stop during zooming from the wide-angle end to the telephoto end and M3 represents the maximum movement amount of the third lens unit in the optical axis direction during zooming from the wide-angle end to the telephoto end, ?1.8<MS/M3<?0.5 is satisfied.

Abstract: A sensor includes a sensor main body, first and second electrodes, an electrode extraction hole, and an interconnection member. A cavity is formed in the sensor main body by joining the outer peripheral portions of the first and second substrates made of an insulating material. The first and second electrodes are formed on the inner surfaces of the first and second substrates which face each other through the cavity. The electrode extraction hole is formed through the first substrate in correspondence with the second electrode. The interconnection member guides the second electrode outside the first substrate through the cavity and the electrode extraction hole. The interconnection member is formed by thermal spraying of metal powder into the cavity from outside the sensor main body through the electrode extraction hole. An electrode extraction structure and electrode extraction method are also disclosed.

Abstract: The present invention provides a tetrazoyloxime derivative which is less likely to cause chemical injury to useful plants and is also superior in chemical efficacy to a conventional hetero ring-substituted oxime derivative. A tetrazoyloxime derivative represented by the general formula (1): X represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a methanesulfonyl group, a nitro group, a trifluoromethyl group, or an aryl group; A represents a 1-alkyltetrazoyl-5-yl group or a 5-alkyltetrazoyl-1-yl group; and Het represents a pyridyl group having a substituent or a thiazoyl group having a substituent, and a plant disease controlling agent containing the same as an active ingredient are disclosed.

Abstract: A zoom lens is constructed with, in order from an object side to an image side, a first lens unit of negative optical power, the first lens unit including a negative meniscus lens having a concave surface facing the image side and a positive meniscus lens having a convex surface facing the object side, a second lens unit of positive optical power, the second lens unit including a cemented lens of positive optical power as a whole disposed on the most image side of the second lens unit, and a lens having a concave surface facing the image side and adjoining a surface on the object side of the cemented lens, and 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.

Abstract: A zoom lens is constructed with, in order from an object side to an image side, a first lens unit of negative optical power, the first lens unit including a negative meniscus lens having a concave surface facing the image side and a positive meniscus lens having a convex surface facing the object side, a second lens unit of positive optical power, the second lens unit including a cemented lens of positive optical power as a whole disposed on the most image side of the second lens unit, and a lens having a concave surface facing the image side and adjoining a surface on the object side of the cemented lens, and 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.

Abstract: A zoom lens is constructed with, in order from an object side to an image side, a first lens unit of negative optical power, the first lens unit including a negative meniscus lens having a concave surface facing the image side and a positive meniscus lens having a convex surface facing the object side, a second lens unit of positive optical power, the second lens unit including a cemented lens of positive optical power as a whole disposed on the most image side of the second lens unit, and a lens having a concave surface facing the image side and adjoining a surface on the object side of the cemented lens, and 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.

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 is constructed with, in order from an object side to an image side, a first lens unit of negative optical power, the first lens unit including a negative meniscus lens having a concave surface facing the image side and a positive meniscus lens having a convex surface facing the object side, a second lens unit of positive optical power, the second lens unit including a cemented lens of positive optical power as a whole disposed on the most image side of the second lens unit, and a lens having a concave surface facing the image side and adjoining a surface on the object side of the cemented lens, and 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.

Abstract: For deodorizing and sterilizing indoor air to make the residence space a comfortable environment, a lamp box (300) having an air inlet (320) and an air outlet (330) between the upper ends of a front heat exchanger (210) and a rear heat exchanger (230), and containing an ultraviolet lamp (310) is placed, ultraviolet light with the waveband of 250 to 260 nm and ultraviolet light with the waveband of 100 to 220 nm are emitted from the ultraviolet lamp (310), and a part of the ultraviolet light is applied to at least the rear heat exchanger (230) through the air outlet (330).

Abstract: Disclosed is a zoom lens system which uses a diffractive optical element such that high optical performance can be obtained over the overall power variation range. The zoom lens system includes a first lens unit having positive optical power, and a second lens unit having negative optical power and disposed on a rearward side of the first lens unit. A diffractive optical portion is provided on a cemented surface, which is convex toward a forward side, in the first lens unit or the second lens unit.

Abstract: A zoom lens system comprises a 1st lens unit with positive optical power consisting of one lens element, a 2nd lens unit with negative optical power, a 3rd lens unit with positive optical power and a 4th lens unit with positive optical power, in order from the object side to the image side is disclosed. During zooming, the 1st lens unit and 3rd lens unit move so as to be located closer to the object side at the telephoto end than at the wide-angle end. Then, by appropriately setting the amount of movements of the 1st lens unit, 2nd lens unit and 3rd lens unit during zooming, the overall length of the zoom lens system is reduced and excellent optical performance is realized.

Abstract: A zoom lens which has a high variable magnification ratio and high optical performance and an optical apparatus having the zoom lens are provided. A zoom lens according to an embodiment of the present invention comprises, in order from an object side, a first, second, third, and a fourth lens unit respectively having positive, negative, positive and positive optical powers. For zooming from the wide angle end to the telephoto end, the first lens unit is moved to an object side, the second lens unit is moved to an image plane side, the third lens unit is moved to the object side, and the fourth lens unit is moved to the object side. The third lens unit is movable in a direction perpendicular to the optical axis to correct an image blur.

Abstract: For deodorizing and sterilizing indoor air to make the residence space a comfortable environment, a lamp box (300) having an air inlet (320) and an air outlet (330) between the upper ends of a front heat exchanger (210) and a rear heat exchanger (230), and containing an ultraviolet lamp (310) is placed, ultraviolet light with the waveband of 250 to 260 nm and ultraviolet light with the waveband of 100 to 220 nm are emitted from the ultraviolet lamp (310), and a part of the ultraviolet light is applied to at least the rear heat exchanger (230) through the air outlet (330).

Abstract: A variable power optical system includes, from an object in order, a first lens group having a positive refracting power and consisting of a positive singlet lens or the combination of one positive lens and one negative lens, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a positive refracting power, wherein at least the second lens group and the third lens group are moved during a variation in magnification and an image is displaced by shifting the entire second lens group or the entire third lens group so as to have a component in a direction orthogonal to the optical axis.

Abstract: A zoom lens is constructed with, in order from an object side to an image side, a first lens unit of negative optical power, the first lens unit including a negative meniscus lens having a concave surface facing the image side and a positive meniscus lens having a convex surface facing the object side, a second lens unit of positive optical power, the second lens unit including a cemented lens of positive optical power as a whole disposed on the most image side of the second lens unit, and a lens having a concave surface facing the image side and adjoining a surface on the object side of the cemented lens, and 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.

Abstract: Disclosed is a zoom lens system which uses a diffractive optical element such that high optical performance can be obtained over the overall power variation range. The zoom lens system includes a first lens unit having positive optical power, and a second lens unit having negative optical power and disposed on a rearward side of the first lens unit. A diffractive optical portion is provided on a cemented surface, which is convex toward a forward side, in the first lens unit or the second lens unit.