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Method for full format imaging

  • US 4,267,261 A
  • Filed: 05/13/1975
  • Issued: 05/12/1981
  • Est. Priority Date: 07/15/1971
  • Status: Expired due to Term
First Claim
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1. The method of producing an image by full format imaging, which method comprises the step of providing on a substrate a solid continuous film of a dispersion imaging material which, upon application of a short pulse of high intensity radiant energy in an amount sufficient to increase the absorbed energy in the material above a certain threshold value, is capable of changing to a substantially molten state in which the surface tension of the material acts to cause the continuous film where subject to said energy pulse to change to a discontinuous film comprising spaced globules and free space therebetween in the film which are frozen in place following said energy pulse and through which free space light can pass, the step of applying a short pulse of high intensity non-coherent radiant energy through an imaging mask having a full format image pattern including portions of higher transmissiveness and portions of lower transmissiveness for said energy pulse to said continuous film of dispersion imaging material simultaneously and substantially evenly in a full format pattern, wherein said full format pattern of the simultaneously and substantially evenly applied energy pulse includes a plurality of areas in which the intensity and pulse width of said energy is sufficient to increase simultaneously and substantially evenly the absorbed energy in the corresponding pattern areas of said dispersion imaging material above said threshold value, and wherein the amount of the radiant energy pulse supplied in a plurality of other areas is insufficient to increase the absorbed energy above said threshold value, thereby causing the material of the continuous film in those pattern areas simultaneously and substantially evenly receiving the higher amount of the non-coherent radiant energy pulse to change to the discontinuous film comprising the spaced globules and free space in the film which are substantially evenly distributed in said pattern areas and through which free space light can pass to provide at one time a stable finished full format image pattern of said discontinuous film in the continuous film corresponding to said full format pattern of the energy pulse.

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