Obtaining information about positional source of, for example, a gamma ray source, by slit collimating and detecting beam components from the source in a multiplicity of varying slit locations, and using the resulting data to plot the source position.

Method and apparatus for imaging using penetrating radiant energy provides a resulting image with elements of intensity related to atomic number. A penetrating radiant energy source is used for generating a flying spot. A first detector is located to be responsive to transmitted energy, e.g. the flying spot traverses the first detector. A second detector is located substantially coplanar with the first detector to be responsive to scattered energy, as the flying spot scans a target. The signals ...

A de-convolution process is applied to an MR, CT or other image (25) of a scanned-object (23) to derive the point-spread function (22') at an object-edge and to pin-point from the mid-point of its full-width-half-maximum FWHM, the location (30) of the true image-edge. With the object-image (25') overlying the PSF function (22') in the de-convolution space, sub-pixels which follow location (30) are transferred to before it to re-construct the image-edge (25') for sharper conformity to the object-...

In an imaging material, which normally produces upon imaging and development an image of one normal polarity (positive or negative), the trapping level is selectively controlled to produce, upon imaging and development, an image of the opposite polarity. This may be achieved, for instance, by adding a trap former to the imaging material, to produce, after selective activation of the trap former, for instance, by energy, the desired differential of the trapping levels in the image and non-image a...

A self-exposing imaging element is disclosed comprising a support member, a light sensitive layer, and a layer containing reagents which will chemically react in a chemiluminescent reaction to produce light which exposes the light sensitive layer when in contact with an original. Reagents in the light generating layer are physically or chemically segregated prior to exposure to prevent reaction, for example, by encapsulation of one of the reactants, the reaction solvent, or a catalyst. To copy t...

A migration imaging system having a migration imaging member with a binder layer of softenable material wherein a mixture of electrically photosensitive and inert fusible particles is dispersed and an imaging process wherein the fusible particles are fused thereby fixing the migrated image of the two types of particles. The imaged member is used as a lithographic printing master.

A method of selectively producing positive or negative photoelectrophoretic copies is described. A suspension of photosensitive particles sensitive to a first range of wavelengths is placed between two electrodes, one of which is transparent and the other of which has a surface sensitive to a second range of wavelengths. When a field is imposed across the suspension and an image is projected through the transparent electrode using radiation in only one of said first and second ranges, a positive...

Apparatus having more than one separate object to project along partially separate optical paths having the same image plane for simultaneous superposition of the images of the two objects. The objects are transparencies with one containing the information to be imaged and the other premade to be the border for it. Both objects move in a carriage relative to an exposure slit for simultaneous scanning projection onto a moving member at the image plane.

Toner image degradation due to excessive buildup of thick deposits of a solid stable hydrophobic metal salt of a fatty acid on the surface of electrostatographic imaging members during successive imaging operations with development material containing the metal salt is prevented by continuously or intermittently maintaining the thickness of the buildup below about 10 microns by vigorous rubbing contact with a wiping member.

An improved method for removing residual toner images from an electrostatic recording surface adapted for continuous automatic operation comprising charging residual toner images supported on an electrostatic recording surface to a first polarity, then cascading a two-component developer material including carrier beads and toner particles in triboelectric relationship over the residual toner images and recording surface and concurrently biasing said residual toner images with a potential at a s...