摘要:
Photocontrolled ion-flow electron radiography apparatus has a multi-layered mesh structure, comprised of a conductive apertured sheet supporting an insulating layer, overlayed with a conductive screen and a top-most layer of photoconductive material, to control an ion stream responsive to a charge image formed in the photoconductive layer responsive to a pattern of x-rays differentially-absorbed by an object to be analyzed.
摘要:
A method and apparatus suited for forming radiographs wherein distribution patterns of penetrating radiation representing radiographic information to be recorded are recorded in terms of electrostatic charge patterns on successive charge-receiving areas distributed along a carrier, by bringing such areas successively into a chamber in which each such area is exposed to an ionizable fluid while this is exposed in an electric field to a pattern of penetrating radiation thus producing in such fluid positive and negative charge carriers and forming with the positive or negative charge carriers a corresponding electrostatic charge pattern on such area, the latter being brought by subsequent movement of the carrier to a position outside such chamber where such electrostatic charge pattern is transferable or developable to form a transferable visible record.
摘要:
In the illustrated embodiments the undersurface of the thermoplastic coating and the associated electrode are formed with a corrugated structure to produce a correspondingly regularly varying electric field at the exposed thermoplastic surface. The spacing between corrugations is much smaller than the desired x-ray image resolution so that the developed image in effect modulates the regular variation produced by the corrugations. Where the original corrugations are derived from an off-axis zone plate, the developed image can be read out by means of a divergent incident light beam.
摘要:
A device for the electrostatic recording of x-ray images comprises two spaced electrodes with a gas-filled gap therebetween. One of the electrodes comprises a layer of an ultraviolet emitting fluorescent material and a layer of an air-exposable ultraviolet-sensitive photoemitting material. A plastic sheet is adjacent to the other electrode. An electric field is applied across the gap to accelerate photoelectrons emitted by the photoemitting material. The electrostatic image formed on the plastic sheet is developed xerographically after the exposure.
摘要:
Disclosed is an electrostatic recording method for forming an electrostatic latent image on a dielectric electrostatic recording layer provided on a conductive support. The relationship between the thickness d[.mu.m] and the specific dielectric constant .epsilon..sub.s of the electrostatic recording layer is such that the ratio of d[.mu.m] to .epsilon..sub.s, i.e. d/.epsilon..sub.s [.mu.m], is not larger than 1.65[.mu.m] when the image recorded is of reflection type and not larger than 1.5[.mu.m] when it is of transmission type. The latent image formed on the recording layer is developed by use of electrophotographic liquid developer. Also disclosed is an ionizing radiation image recording method wherein ionizing radiation carrying image information is directed onto a material which generates photoelectrons or a gas which is dissociated upon receipt of the ionizing radiation to an extent corresponding to the intensity of the radiation. In this method, the ratio of the thickness of the electrostatic recording layer to the specific dielectric constant is selected to be not larger than 1.5[.mu.m] when the image is of reflection type and not larger than 1.0[.mu.m] when it is of transmission type.
摘要:
An arrangement for the electro-photographic recording or taking of radioscopic pictures. The arrangement for the electro-photographic taking of radioscopic pictures provides a constant level of illumination which is independent of current requirements. The object is attained by providing a support for the exposure or photographic layer with mutually insulated, electrically conductive layers between which there is located the exposure layer, and wherein the two conductive layers are connected to an installation for controlling the source of the transilluminating radiation.
摘要:
A process of producing an electrostatic photographic image by means of X-rays, comprising applying a voltage across two electrodes disposed in opposed parallel relationship, one of the electrodes having a layer of an insulating material on the side thereof facing the other electrode, the space between the insulating layer and the other electrode being filled with an electron or ion emitting liquid. The electrons or ions are generated in the liquid by subjecting the latter to imagewise exposure with X-rays and the electrons or ions are absorbed on the surface of the insulating layer to form an electrostatic latent image. The latent image is then developed with ionized toner to render the same visible.
摘要:
An electronradiography imaging chamber providing a real time visual image. An electronradiography imaging chamber with electrophoretic particles in the electrode gap, with the particles being selectively moved to a transparent electrode as a result of the electrostatic charge image formed by absorbtion of incoming X-ray radiation in the gap. A dark field illumination viewing configuration with the deposited particles providing light scattering giving a visual image with low radiation dosage. An imaging chamber which can be cyclically operated at a relatively high repetition rate, typically 10 to 20 images per second, thereby providing real time viewing of the object.
摘要:
Apparatus and method for improving an electron radiograph by reducing the charge density in the background area of the electrostatic image and thereby reducing the amount of toner attracted to such areas during developing. The latent electrostatic image is generated by exposure to a radiation source in an imaging chamber and the higher charge densities are then neutralized by exposing the electrostatic image to an ion discharge, with a bias potential for limiting the neutralizing action, after which the electrostatic image is developed into a visual image.
摘要:
An imaging chamber for an x-ray system using a receptor sheet for a latent electrostatic image in the gap between electrodes. A chamber with substantially planar electrodes with each electrode having a spiral resistor and a low conductivity layer in contact with the resistor, with the spiral resistors interconnected by a third resistor across a power supply to produce electrostatic potentials at the gap surfaces the same as the electrostatic potentials of concentric spherical metal electrodes.