Abstract: A divalent europium activated alkaline earth metal halide phosphor having the formula (I):M.sup.II X.sub.2 .multidot.aM.sup.II X'.sub.2 .multidot.bA:xEu.sup.2+(I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; A is a compound selected from the group consisting of SiO and SnX".sub.2 wherein X" is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0 and 0<x.ltoreq.0.2, respectively; and b is a number satisfying the conditions of 0<b.ltoreq.3.times.10.sup.-2 in the case of A being SiO and 0<b.ltoreq.10.sup.-3 in the case of A being SnX".sub.2.

Abstract: A recording material is exposed to radiation carrying image information in order to store a radiation image thereon. The recording material is provided with a stimulable phosphor layer constituted of a cerium activated lanthanum oxyhalide phoshor which is represented by the general formula LaOX:xCe, where X is at least one halogen selected from the group consisting of Cl, Br, and I, and x is a number satisfying the condition 0<x.ltoreq.0.2, and in which the atomic ratio X/La satisfies the condition 0.50<X/La.ltoreq.0.998. After a radiation image has been recorded on it, the recording material is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, and the emitted light is photoelectrically detected in order to obtain an image signal. The recording material is then subjected to primary and secondary erasing operations in order to release any energy still stored thereon.

Abstract: There is disclosed a novel cerium activated rare earth oxyhalide phosphor which has the following formula (I):LnOX:xCe (I)in which Ln is Y, La, Gd or Lu; X is Cl, Br or I; and x is 0<x.ltoreq.0.2, and a ratio of X/Ln is 0.500<X/Ln.ltoreq.0.998 by atomic ratio, and the maximum peak (.lambda.) of the stimulation spectrum of the phosphor is 550 nm<.lambda.<700 nm. a radiation image recording and reproducing method and a radiation image storage panel employing the above-mentioned phosphor are also disclosed.

Abstract: A radiation image storage panel comprising a phosphor layer which contains a stimulable phosphor, characterized in that one surface of said phosphor layer is provided with a multi-layer optical filter which has a transmittance of not less than 70% for the light of the stimulation wavelength of said stimulable phosphor and at an incident angle in the range of 0.degree.-5.degree. and has a reflectance of not less than 60% for the light of said stimulation wavelength and at an incident angle of not smaller than 30.degree..

Abstract: A method for recording and reproducing an electron beam image information comprising:recording an electron beam image transmitted through a sample or reflected from the sample as an electron beam energy latent image on a stimulable phosphor sheet comprising, according to the present invention, a stimulable phosphor layer having a thickness in the range of 10 to 150 .mu.m and/or an exposed stimulable phosphor layer with no protective layer, or a protective layer, the thickness of which is preferably less than the thickness of a stimulable phosphor layer of a generally employed stimulable phosphor sheet;irradiating said stimulable phosphor sheet with an electromagnetic wave to release at least a portion of the electron beam energy stored in said stimulable phosphor sheet as stimulated emission;detecting the stimulated emission;andphotoelectrically processing the detected stimulated emission to obtain an electron beam image information of the sample.

Abstract: A radiation image read-out apparatus is constituted for exposing a recording material provided with a stimulable phosphor and carrying a radiation image stored thereon to stimulating rays which cause the recording material to emit light in proportion to the stored radiation energy, and photoelectrically detecting the emitted light to read out the radiation image. The apparatus is provided with a multi-layer optical filter whose reflectivity with respect to stimulating rays increases as the angle of incidence of stimulating rays increases. The multi-layer optical filter is disposed in the optical path of stimulating rays in the vicinity of the recording material or formed on the surface of the recording material on the stimualting ray irradiation side, thereby increasing the efficiency of utilization of stimulating rays. In one embodiment, a second multi-layer optical filter is disposed in the vicinity of or formed on the surface of the recording material on the emitted light detection side.

Abstract: A radiation image read-out apparatus is constituted for exposing a recording material provided with a stimulable phosphor and carrying a radiation image stored thereon to stimulating rays which cause the recording material to emit light in proportion to the stored radiation energy, and photoelectrically detecting the emitted light by a photodetector to read out the radiation image. The photodetector is disposed on the side opposite to the stimulating ray irradiation side with respect to the recording material. A multi-layer optical filter substantially reflecting stimulating rays and substantially transmitting the light emitted by the recording material is disposed between the recording material and the photodetector.

Abstract: An improved radiation image storage panel comprising a support and a stimulable phosphor layer is disclosed. The stimulable phosphor layer comprises an agglomerate of a stimulable phosphor. A strain-reducing layer is provided between the phosphor layer and the support.

Abstract: A radiation image read-out apparatus comprises a linear stimulating ray source for emitting stimulating rays to a linear portion of a stimulable phosphor sheet carrying a radiation image stored therein, and a line sensor constituted by many solid state photoelectric conversion devices. The line sensor extends at least over the length of the linear portion of the stimulable phosphor sheet exposed to stimulating rays. Light emitted by the linear portion of the stimulable phosphor sheet upon stimulation thereof is received and photoelectrically converted by the solid state photoelectric conversion devices. The portion exposed linearly to stimulating rays and the line sensor are moved with respect to the stimulable phosphor sheet, and outputs of the line sensor are sequentially read out in accordance with the movement of the portion exposed linearly to stimulating rays and the line sensor with respect to the stimulable phosphor sheet.

Abstract: An electron microscope has a two-dimensional sensor located at the image-formation plane. The two-dimensional sensor stores electron beam energy and emits light upon exposure to light or heat. The filament is located at a position displaced from the principal optical axis of the electron beam so that the image of the filament may not be recorded on the two-dimensional sensor. The two-dimensional sensor is, for example, made of stimulable phosphor.

Abstract: A radiation image storage panel comprising a phosphor layer which contains a stimulable phosphor, characterized in that one surface of said phosphor layer is provided with a multi-layer optical filter having a reflectance of not less than 60% at the stimulation wavelength of said stimulable phosphor.

Abstract: A divalent europium activated alkaline earth metal halide phosphor which is coactivated with boron and has the formula (I):M.sup.II X.sub.2.aM.sup.II X'.sub.2 :xEu.sup.2+,yB (I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; and a, x and y are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 0<x.ltoreq.0.2 and 2.times.10.sup.-4 .ltoreq.y.ltoreq.2.times.10.sup.-1, respectively. A radiation image recording and reproducing method utilizing said phosphor and a radiation image storage panel employing said phosphor are also disclosed.

Abstract: A radiation image recording and reproducing method comprising steps of:(i) causing a divalent europium activated complex halide phosphor having the formula (I):M.sup.II X.sub.2 .multidot.aM.sup.II X'.sub.2 .multidot.bMgX".sub.2 :xEu.sup.2+ (I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, B and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 2.times.10.sup.-5 .ltoreq.b.ltoreq.2.times.10.sup.-2 and O<x.ltoreq.0.2, respectively, to absorb a radiation having passed through an object or having radiated form an object;(ii) exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-1000 nm to release the radiation energy stored therein as light emission; and(iii) detecting the emitted light.

Abstract: In a system for recording and reproducing an electron microscope image, a two-dimensional sensor for storing electron beam energy is exposed to an electron beam passing through a sample in a vacuum to have the electron beam energy stored in the two-dimensional sensor. The two-dimensional sensor is then exposed to light or heated while the vacuum is maintained to release the stored energy as light emission. The light emitted by the two-dimensional sensor is photoelectrically detected to obtain an electric signal for reproducing a visible image.

Abstract: A radiation image recording and read-out apparatus comprises a read-out and erasing unit provided with an image read-out device for irradiating stimulating rays to an image-recorded stimulable phosphor sheet and detecting light emitted by the stimulable phosphor sheet upon exposure to stimulating rays, and a device for erasing radiation energy remaining on the stimulable phosphor sheet. The read-out and erasing unit is reciprocated normal to the direction of irradiation of stimulating rays for carrying out image read-out during forward movement, and carrying out erasing by the erasing device during backward movement.

Abstract: A radiation image read-out apparatus comprises a stimulating ray source for emitting stimulating rays to a stimulable phosphor sheet carrying a radiation image stored therein, a photodetector comprising a photoelectric conversion device, a wavelength converting phosphor positioned between the photodetector and the stimulable phosphor sheet, and a read-out device for detecting the output of the photodetector. The wavelength converting phosphor emits fluorescent light mainly of a wavelength distribution within a sensitive wavelength range of the photodetector upon reception of light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays.

Abstract: A radiation image storage panel comprising a phosphor layer which comprises a stimulable phosphor, in which said phosphor layer consists essentially of a sintered stimulable phosphor and has a relative density of not less than 70%. Processes for the preparation for the same are also disclosed.

Abstract: A divalent europium activated alkaline earth metal halide phosphor having the formula (I):M.sup.II X.sub.2 .multidot.aM.sup.II X'.sub.2 .multidot.bA:xEu.sup.2+(I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; A is at least one oxide selected from the group consisting of SiO.sub.2 and P.sub.2 O.sub.5 ; and a, b and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 10.sup.-4 .ltoreq.b.ltoreq.2.times.10.sup.-1 and 0<x.ltoreq.0.2, respectively. A radiation image recording and reproducing method utilizing said phosphor and a radiation image storage panel employing said phosphor are also disclosed.

Abstract: A radiation image read-out apparatus comprises a stimulating ray source for producing stimulating rays which excite a stimulable phosphor, a device for scanning the stimulating rays on a stimulable phosphor sheet carrying a radiation image stored thereon in a main scanning direction, and a fluorescent light guide member obtained by forming a sheet-shaped material containing a phosphor and disposed so that a surface of the fluorescent light guide member receives the light emitted by the stimulable phosphor sheet when the stimulable phosphor sheet is scanned by the stimulating rays. A photodetector is closely contacted with an end face of the fluorescent light guide member, and a sub-scanning device is provided for moving the stimulable phosphor sheet with respect to the stimulating rays in a sub-scanning direction approximately normal to the main scanning direction.

Abstract: A divalent europium activated alkaline earth metal complex halide phosphor having the formula (I):M.sup.II X.sub.2.aM.sup.II X'.sub.2.bM.sup.I X":xEu.sup.2+ (I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M.sup.I is at least one alkali metal selected from the group consisting of Li and Na; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, b and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 0<b.ltoreq.2.times.10.sup.-1 and 0<x.ltoreq.0.2, respectively. A process for the preparation of said phosphor is also disclosed.