| 摘要 |
The present invention provides a spectrally sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition which displays uniform image density across its surface when exposed to floodlight or uniform incandescent light exposure at radiation wavelengths to which the element is sensitive, said element comprising at least two layers, including a top layer and a photothermographic emulsion layer, said photothermographic emulsion layer comprising a binder, a light insensitive silver source, a reducing agent for silver ion and infrared radiation sensitive silver halide grains, wherein the coherent radiation is rendered more diffuse in its passage through the element than when it strikes the top layer. This may be accomplished at least in part by 1) the top layer of the element having haze induced therein of 0.05 to 306 by surface modification of that layer, 2) there being a random refractive pattern on the top layer, 3) haze being induced in the silver halide containing layer, 4) the reflective characteristics of a surface of the support layer facing the photothermographic composition have been altered to reduce reflection of coherent radiation into said composition, and/or 5) having a radiation absorbing material contained within the photothermographic element to decrease light reflected off of the support.
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