Abstract: Disclosed herein is a silver halide emulsion which contains grains made of silver chloroiodobromide, silver iodobromide, or silver chlorobromide, each of said grains having at least one dislocation line and chemically sensitized with a tellurium sensitizer which has a pseudo-first order reaction rate constant k of 1.times.10.sup.-8 to 1.times.10.sup.0 min.sup.-1. Also disclosed herein is a silver halide photographic light-sensitive material which comprises at least one layer made of the silver halide emulsion, in which the grains occupying at least 50 wt % of said emulsion layer.

Abstract: A silver halide photographic emulsion containing tabular silver halide grains which have an aspect ratio of 2 or more and in which dislocations are localized in a center portion of each grain. The tabular silver halide grains have a thickness of less than 0.5 .mu.m and a diameter of 0.3 .mu.m or more and account for at least 50% of a total projected area of the silver halide grains. This emulsion has a high sensitivity and good reciprocity characteristics. In a photographic light-sensitive material having at least two light-sensitive silver halide emulsion layers having different color sensitivities on a support, the above tabular silver halide photographic emulsion and at least one type of a coupler which is coupled with an oxidant of a color developing agent to develop a color are added to at least one of the emulsion layers, thereby obtaining a photographic light-sensitive material having a high sensitivity and good reciprocity characteristics.

Abstract: A laser processing apparatus is disclosed for use in cutting or welding relatively thick plates. The apparatus utilizes a laser beam applied to a plate in conjunction with a jet of gas to effect the cutting or welding action, and a movable mirror system is provided in the path of the laser beam. The mirror system is controlled so that as a device for applying the laser beam to the workpiece is moved with relation to the remainder of the apparatus, the mirror system is also moved to maintain constant the travelling distance for the laser beam. Therefore, a laser light distance between the laser oscillator and a plate can be maintained at a fixed length so that a laser spot diameter on the plate is constant as the laser light heats the plate in the thickness-direction.