Hamamatsu-photonics K.k.

Masayoshi Ishikawa

Tsutomu Nakamura

Yasuhiro Tomita

Yutaka Ochiai

Kinji Takase

Takane Yokoi

Masayoshi Kato

A maximum tube voltage value setting module, a warming-up module, a limit tube voltage control module, a limit tube current control moduleand a focus grid electrode control moduleof an operation programwhich respectively correspond to different maximum tube voltage values are stored in storage sections-of an X-ray tube control apparatus. When the maximum tube voltage value of an X-ray tubeis changed, an extraction sectionextracts each module of the operation programwhich corresponds to the maximum tube voltage value after being changed from the storage sections-. A communications sectionsends the operation programcomprised of each extracted module to an X-ray tube controllerand overwrites it in a memory section

X-ray tube control apparatus and x-ray tube control method

An initial image (the image of a slit plateimaged when adjusted to an optimal focal diameter) is stored in a storage sectionof an X-ray tube adjusting apparatus. An acquisition sectionacquires a test image (the image of the slit plateimaged at the time of adjusting the focal diameter). A presentation sectionpresents the initial image and an image representing the luminance on the initial image (showing a contrast &#x394;a between a slit portionand a residual area portionin the initial image) and the test image and an image representing the luminance on the test image (showing a contrast &#x394;b between a slit portionand a residual area portionin the initial image) simultaneously (in a comparable manner).

X-ray tube adjustment apparatus, x-ray tube adjustment system, and x-ray tube adjustment method

An X-ray generatorincludes an X-ray tubehaving a cathode portion, a grid electrodeand a target, a voltage controllerandfor controlling voltages to be applied to the cathode portionand the grid electrode, and switchesandfor operating ON and OFF of the X-ray generatorand of X-ray emission. The voltage controllerand, based on an ON-signal for the X-ray generatorand an OFF-signal for the X-ray emission, applies a positive standby voltage Vto the cathode portionand applies a negative cutoff voltage Vto the grid electrode

X-ray generator

An image-forming apparatus which does not adversely affect its surrounding environment when in use, which has excellent durability, and which is safe to use is provided. A photosensitive layer is disposed on the outer surface of a rotatable closed-loop substrate drum. A charger, an exposure portion, a developing portion, a transfer portion, a fixing portion, and a cleaner are provided around the substrate drum. The charger includes an X-ray generator, which electrolytically dissociates the air on the surface of the photosensitive layer upon X-ray irradiation, and electric-field generator which guides a gaseous ion formed by electrolytic dissociation to the surface of the photosensitive layer. The cleaner is constituted by erasure X-ray generation means which ionizes the air on the photosensitive layer, in which a coloring fine particle remains, upon irradiation with an X-ray irradiation, while generating a carrier within the photosensitive layer.

Image-forming apparatus using X-ray for charging and cleaning a

An image-forming apparatus which does not unfavorably influence its surrounding environment when in use and is excellent in durability of use and safety is provided. In the image-forming apparatus, a photosensitive layer is disposed on the outer surface of a closed-loop substrate drum, while a charge device, an exposure device, a developing device, a transfer device, a fixing device, and a cleaning device are provided around the substrate drum. The substrate drum is made of a light element. The charge device is constituted by a charging X-ray generation member, which is disposed within the substrate drum and emits an X-ray through the substrate drum and photosensitive layer so as to electrolytically dissociate the air on the surface of the photosensitive layer, and an electric-field application member which guides, by means of an electric field, a gaseous ion formed by this electrolytic dissociation to the surface of the photosensitive layer. The cleaning device is constituted by an erasure X-ray generation member which ionizes the air on the photosensitive layer, in which a coloring fine particle remains, upon irradiation of an X-ray emitted from within the substrate drum through the substrate drum and the photosensitive layer, while generating a carrier within the photosensitive layer.

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Hamamatsu, Japan

Masayoshi Ishikawa