Kasei Optonix, Ltd.

Fuji Photo Film Company, Limited

Dai Nippon Toryo Co., Ltd.

Noboru Kotera

Shusaku Eguchi

Junji Miyahara

Norio Miura

Hisatoyo Kato

Seiji Matsumoto

Kazuhito Iwasaki

Katuzo Kanda

Syusaku Eguchi

Kenji Takahashi

Thihiro Yoshida

Seiji Murakami

Isao Iwamoto

Toshiaki Hatsumi

Takashi Hase

Hisashi Yamazaki

Masanori Teraoka

Etsuo Shimizu

Morio Hayakawa

Yoshitugu Nishimura

Teiichi Hitomi

Shinichi Onogi

Hidenaga Horiuchi

Hitoshi Sakamoto

Phosphorescent phosphor

A rare earth element activated complex halide phosphor represented by the formula

Phosphor

A radiation image storage panel for obtaining a radiation image of an object by causing said panel to absorb a radiation transmitted through said object and then exposing the panel to light of wavelength ranging from 450 to 800 nm to cause the panel to release radiation energy stored therein as fluorescent light, said panel having a fluorescent layer of a rare earth element activated complex halide stimulable phosphor represented by the formula

Method for obtaining a radiation image

A radiographic intensifying screen comprising a support and a fluorescent layer formed thereon, said fluorescent layer consisting essentially of at least one terbium-activated rare earth oxysulfide phosphor of the formula:

Radiographic intensifying screen

A radiation image conversion panel is made of a stimulable phosphor which stores radiation energy when exposed to a radiation and emits light when stimulated by visible light or infrared rays. The panel is subjected to excitation before it is exposed to a radiation for recording or storing a radiation image therein by exposing the panel to light having a wavelength within the range of stimulating light wavelength of the stimulable phosphor used in the panel. By exciting the panel before exposure to radiation, the energy of radiation stored therein which will cause a noise is removed therefrom.

Method of and apparatus for obtaining a radiation image by use of a

A radiation image storage panel having a fluorescent layer which comprises a binder and a stimulable phosphor dispersed therein. Further, the panel is colored with a colorant so that the mean reflectance of the panel in the wavelength region of the stimulating rays of the stimulable phosphor is lower than the mean reflectance of the panel in the wavelength region of the light emitted by the stimulable phosphor upon stimulation thereof. The panel provides an image of high sharpness.

Radiation image storage panel

A divalent metal fluorohalide phosphor having a compositional formula:

Phosphor and radiation image storage panel utilizing the same

Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.

Pigment coated phosphor and high contrast color television cathode ray

A barium fluorohalide phosphor represented by the formula

A radiation image recorded in a stimulable phosphor sheet or plate is visualized by stimulating the phosphor with stimulating rays. Being stimulated by the stimulating rays, the phosphor emits detectable light. The emitted light is detected by a photodetector. The wavelength of the stimulating rays is selected within the range of 600 to 700 nm. The wavelength of the light detected by the photodetector is selected within the range of 300 to 500 nm.

Method of and apparatus for reading out a radiation image recorded in a

A radiation image is recorded on a stimulable phosphor and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used an alkaline earth metal fluorohalide phosphor having high stimulability represented by the formula

Method and apparatus for recording and reproducing a radiation image

A radiation image is recorded on a stimulable phosphor, and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used at least one of the following phosphors.

A pigment coated phosphor used as a green emitting phosphor for a high contrast color television cathode ray tube. A green emitting phosphor is coated with TiO.sub.2 --ZnO--CoO--NiO system pigment particles.

Pigment coated phosphor

On the surface of a phosphor, pigment particles are uniformly adhered by a layer of a gelatin-gum arabic mixture. A process for manufacturing such a pigment coated phosphor includes the steps of preparing an aqueous solution of gelatin and an aqueous solution of gum arabic, allowing the phosphor to disperse homogeneously into one of these aqueous solutions, allowing the pigment particles to disperse homogeneously into the other aqueous solution, and mixing the so obtained phosphor and pigment dispersions.

Growing community of inventors

Odawara, Japan

Noboru Kotera