Abstract: Disclosed is a pattern exposure method for conducting an overlay exposure to a base pattern previously formed by using electron beam, which has the steps of: 1) dividing a group of patterns formed on the base pattern into arbitrary regions; 2) calculating an area density of the base pattern in each of the arbitrary regions; 3) generating a pattern according to the area density; 4) conducting sub-exposure using the pattern; and 5) conducting main exposure to expose a desired pattern.

Abstract: A photosensitive element comprising a support carrying photosensitive silver halide grains in a substantially predetermined spaced array and methods for forming such photosensitive elements.

Abstract: A photosensitive silver halide element comprising a support carrying single effective silver halide grains in a predetermined spaced array is prepared by coalescing fine-grain silver halide in a plurality of spaced depressions in a surface by melting said fine-grain silver halide.

Abstract: A photosensitive material in the form of a silver and chlorine-containing polyphosphate which exhibits permanent visible darkening on exposure to ultraviolet or short wavelength visible light, is described.

Abstract: An optical information storage medium comprising a thin, optically darkenable film containing silver, lead, chlorine and oxygen, produced by vapor-depositing AgCl and PbO in specified proportions on a substrate for the film, is described.

Abstract: An ultraviolet-sensitive optical information recording material comprising doped silver chloride and tin oxide which exhibits high ultraviolet darkening sensitivity and good resistance to darkening or bleaching by visible light, and a method for optically recording information in permanent, optically-readable form in such a material by direct writing without chemical development, are described.

Abstract: A photosensitive medium for storing optical information relating to the intensity and polarization of incident light, consisting of an inorganic multilayer film comprising multiple thin layers of silver chloride to which additive coloration has been imparted by chemical means, is described.

Abstract: Optically bleachable multilayer films containing additively colored silver chloride which exhibit high infrared transmittance and good bleaching sensitivity, and optical information storage media incorporating such films, are described.

Abstract: A planographic printing plate material comprising a support and a light sensitive layer provided on the support, the light-sensitive layer being composed of (A) an inorganic material; (B) at least one metal and/or metal compound [(A)/(B) are capable of reacting with each other upon application of electromagnetic radiation] and (C) an organic compound capable of affecting the reaction between the inorganic material (A) and the metal and/or metal compound (B), wherein the inorganic material (A), the metal or metal compound (B), and the organic compound (C) are in contact with each other. When the light-sensitive layer is exposed to electromagnetic radiation, a difference in the hydrophilic or oleophilic nature of the exposed areas and the unexposed areas results, whereby a planographic printing plate is obtained which can be mounted on a printing machine and printed without any other treatments.