Abstract: An X-ray sensor according to the present invention includes: a light-transmissive substrate (17); a light-transmissive electrode (21) formed on one surface of the light-transmissive substrate (17); and a photoconductive film (18) including a hole injection blocking layer (22), a field buffer layer (23), a hole trap layer (24), a photoconductive sensitive layer (25) having a charge-multiplying function, and an electron injection blocking layer (26), the layers being sequentially provided on the one surface of the light-transmissive substrate (17) having the light-transmissive electrode (21). The field buffer layer (23) is larger in thickness than a layer composed of the light-transmissive electrode (21) and the hole injection blocking layer (22).

Abstract: A process of producing a hot dipped wire. During the wire drawing, the base wire is passed over a passage surface made of a non-iron material. After steam heating, cleaning and drying steps, the wire is heated in an atmosphere of a reducing gas for effectively removing an oxide layer on the surface of the wire and for preheating the wire to accelerate a reaction between the wire and a molten hot dipping metal used in the subsequent hot dipping step.

Abstract: A process of producing a hot dipped wire. During the wire drawing by the use of a water soluble lubricant, the base wire is passed over a passage surface made of a non-iron material. The drawn wire is heated in an atmosphere of a reducing gas for effectively removing an organic residue such as the lubricant and/or an oxide such as an iron oxide, inevitably adhered to the surface of the wire, and for annealing and for preheating the wire to accelerate a reaction between the wire and a molten hot dipping metal used in a subsequent hot dipping step.

Abstract: An image pickup tube is provided with the third electrode to control the potential of the region which is not scanned by an electron beam in the image pickup tube target section including a target electrode and a photo-conductive film. A method for operating this image pickup tube is also disclosed. Thus, undesired image phenomena which are generated when the image pickup tube is used with a relatively high target voltage, e.g., image distortion, shading, a waterfall phenomenon and image inversion phenomenon can be suppressed, thereby realizing a high sensitivity image pickup tube.

Abstract: An image pick-up apparatus is disclosed which includes a target portion having a photoconductive film on a substrate and a target electrode and reads video information converted into an electric signal in the photoconductive film by an electron beam. An insulating region is provided for the target portion such that carrier generated in an ineffective scanned region (a target region corresponding to an area not scanned by the electron beam) does not appear on a surface of the target portion.

Abstract: A photoconductive device having a transparent substrate, a transparent conductive film, a photoconductive film and a layer of an insulator provided on at least part of the substrate and of high thermal conductivity, and a method of operating the photoconductive device. Thus, especially, the temperature of a photoconductive film of an imaging device typical of an image pick-up tube or the photoconductive device which may be a one- or a two-dimensional image sensor or a photocell can be controlled precisely and efficiently.

Abstract: A filter apparatus for removing plankton out of fresh or sea water containing the plankton. The filter apparatus comprises a filter housing provided with a partition plate having a plurality of through-holes thereby to partition the housing into a non-filtrate chamber and a filtrate chamber. A plurality of filter elements, each having open top end, a filter portion and non-filter portion, which are fitted in the through-holes of the partition plate to protrude the open top ends into the filtrate chamber. Plankton in the water are concentrated at the non-filter portion disposed near the partition plate and removed through an opening provided at a portion of the non-filtrate chamber near the partition plate.

Abstract: A filter is disclosed which is capable of withstanding repeated use by cleaning. The filter is so constructed that around a frame body is wound a filter wire at a constant slit space of less than 40 with a maximum error of 50%. A method for manufacturing such a filter is also disclosed which comprises winding, on a frame body, a filter wire paired with a spacer wire for keeping the slit space of said filter wire constant in such a manner that each turn is in contact with adjacent turns; and removing the spacer wire alone by chemical or physical means while holding these wires fixed so as to obtain a filter with a smaller slit space error.

Abstract: A silver-silver chloride electrode used for medical measurement etc. and its manufacturing method are disclosed. A method of manufacturing a silver-silver chloride electrode by chemically reacting silver powder with chlorine in a solution containing chlorine ions or in a gas mixture containing chlorine or a chlorine compound to form silver chloride on the surface of the silver powder, followed by compression-forming of said powder is disclosed together with the silver-silver chloride electrode obtained by said method.