Abstract: The stationary induction apparatus includes: a static induction device main body; a tank accommodating the static induction device main body along with an insulating material; an upper stay for reinforcement and a lower stay for reinforcement provided on at least upper part and lower part of an outer surface of the tank; and a sound insulating board provided between the upper stay and the lower stay. The sound insulating board is connected to the upper stay at its one end via a first support member, and to the lower stay at another end via a second support member. The first support member is entirely joined to the upper stay, and the second support member is entirely joined to the lower stay. The sound insulating board is partially joined respectively to the first support member and to the second support member.

Abstract: A stationary induction electric machine which makes it possible to detect partial discharge in the stationary induction electric machine with favorable sensitivity and easily retrofit an electromagnetic wave detection sensor to the already installed stationary induction electric machine is provided. The stationary induction electric machine has in a tank a core including a plurality of core legs and a winding wound around the core legs. A polymer bushing 6 is secured on the upper face of the tank through a support fitting 18. The polymer bushing 6 is provided with an electromagnetic wave detection sensor 11, which is placed in a position where the support fitting 18 is avoided.

Abstract: An optical system (1) includes: a first lens system (10) that emits light (51a) of a visible light band incident from a light modulating device (60) side toward a projection side; and an optical device (30) that separates proximate light (52b), which is adjacent to the visible light band and is light of a non-visible light band that is incident on the first lens system (10) from the projection side, from an optical path (41) of the first lens system (10) and outputs toward an image pickup device (70) side.

Abstract: The invention provides a stationary induction apparatus excellent in core vibration damping, being capable of realizing reduction in core excitation-noise. The stationary induction apparatus according to the invention includes a core made up of plural of core-legs formed by lamination of electromagnetic steel sheets, and a core-yoke formed by lamination of electromagnetic steel sheets to join the plural core-legs together; a core-tightening clasp for tightening a joint between the core-yoke and the core-legs, in the direction of the lamination of the electromagnetic steel sheets, to be secured, a winding, a tank, and an insulating sheet disposed between the core-tightening clasp and the core-yoke. Further, a concave hollowed-out part or a notched part is provided on the insulating sheet, positioned at a joint between the core-yoke and the core-leg, and a vibration insulator is disposed in the concave hollowed-out part or the notched part.

Abstract: Electrical insulating paper according to an embodiment of the present invention is used while being immersed in electrical insulating oil, and includes a paper base material mainly containing cellulose, an adsorption layer formed on an entire surface of the paper base material by adsorption, and a moisture barrier layer formed by being chemically bonded to the adsorption layer. The moisture barrier layer includes an amphipathic molecule containing both a hydrophobic hydrocarbon group and a hydrophilic functional group in one molecule. The amphipathic molecule is chemically bonded to the adsorption layer via the hydrophilic functional group. The hydrophobic hydrocarbon group covers the surface of the paper base material.

Abstract: A static apparatus is provided in which a partial discharge, if occurred in a winding end portion, is unlikely to lead to insulation breakdown. The windings and core of a static apparatus are housed in a tank filled with coolant. The winding is fixed by upper and lower parts supporting winding. A continuous coolant duct is formed in a section embracing the winding and the upper and lower parts supporting winding. A coolant duct from the wiring, extending through the upper or lower parts supporting winding and connected with the coolant space is configured in a structure in which toroidal ducts in multiple tiers are connected in a vertical direction of the winding. Connecting holes of one toroidal duct and of its next toroidal duct are staggered with respect to each other and spaced at intervals which are longer than the width of the toroidal ducts.

Abstract: An optical system that projects projection light from an image generating device, onto a screen is provided. The optical system comprises: a lens system on which the projection light from the image generating device is incident; and an aspherical mirror with negative power as a whole that is disposed on an optical path between the lens system and the screen, wherein a curvature of the aspherical mirror in the radial direction changes positive to negative on a way from a center to a periphery thereof.

Abstract: A projection lens system that projects projection light from a light modulator onto a screen and which is telecentric on an input side is provided. The projection lens system comprises a first meniscus lens that is disposed closest to the screen, is convex on a screen side, and has negative refractive power; and a second meniscus lens that is disposed next closest to the screen, is convex on a screen side, and has negative refractive power. The first meniscus lens is made of plastic and at least one out of two curved surfaces thereof is aspherical, and a refractive power of the first meniscus lens is lower than a refractive power of the second meniscus lens. In the projection lens system, far superior aberration-correcting performance can be achieved and a drop in aberration-correcting performance due to thermal deformation can be prevented.

Abstract: An optical system that projects projection light from an image generating device, onto a screen is provided. The optical system comprises: a lens system on which the projection light from the image generating device is incident; and an aspherical mirror with negative power as a whole that is disposed on an optical path between the lens system and the screen, wherein a curvature of the aspherical mirror in the radial direction changes positive to negative on a way from a center to a periphery thereof.

Abstract: A projection lens system that projects projection light from a light modulator onto a screen and which is telecentric on an input side is provided. The projection lens system comprises a first meniscus lens that is disposed closest to the screen, is convex on a screen side, and has negative refractive power; and a second meniscus lens that is disposed next closest to the screen, is convex on a screen side, and has negative refractive power. The first meniscus lens is made of plastic and at least one out of two curved surfaces thereof is aspherical, and a refractive power of the first meniscus lens is lower than a refractive power of the second meniscus lens. In the projection lens system, far superior aberration-correcting performance can be achieved and a drop in aberration-correcting performance due to thermal deformation can be prevented.

Abstract: A projection zoom lens system of the present invention having telecentric incident side is suitable for a projector apparatus using LCD or DMD with prism. The projection zoom lens system of this invention comprises five lens groups having, from the screen side, negative, positive, positive, negative and positive power. In addition to this arrangement, since the lens located closest to the screen is a screen side convex negative meniscus lens, wide-angled and bright zoom lens system can be realized. Further, by designing the distribution of power of the first lens group located closest to the screen, the projection zoom lens provides further improved aberration correction. As the condition for realizing the aforementioned projection zoom lens system, it is preferable that a focal length f1 of the first lens group and a focal length at a wide-angle end fw satisfy the following condition:-1.9<f1/fw<-0.9 (A).

Abstract: A thermal image analysis system 1 includes a reference signal generating circuit 10 for generating two or more reference signals, an image synthesizing circuit 11 for combining an image outputted from an image output circuit 9 with the reference signals, a reference signal sensing circuit 13 for sensing the reference signals from an image signal inputted into an image input circuit 8, a numerical input circuit 12 for inputting temperature information corresponding to the reference signals and a compensation circuit 14 for compensating the image signal, based on the temperature information and reference signals. The reference signal generating circuit 10 generates reference signals of two or more levels. The reference signal sensing circuit 13 senses the reference signals from an image signal reproduced by an image recording/reproducing system 2.

Abstract: In a zoom lens system in which all or some of the lens components excluding the front fixed lens component are axially moved for taking a close-up photograph, a focusing lens group is axially moved in response to movement of a zooming lens group to maintain the resultant image position always in a stationary image plane. The interconnection between the focusing lens and the zooming lens is made through a mechanical or electrical control means which controls the movement of the focusing lens with reference to the movement of the zooming lens in accordance with a predetermined relationship therebetween.