초록 ▼

A method and apparatus for exposing an imaging sheet to form a latent image in a layer of photosensitive microcapsules on the surface of the imaging sheet utilizes wavelength or frequency transformation of light images representative of the latent image, which transformation is performed by a light

A method and apparatus for exposing an imaging sheet to form a latent image in a layer of photosensitive microcapsules on the surface of the imaging sheet utilizes wavelength or frequency transformation of light images representative of the latent image, which transformation is performed by a light valve. An original document, including images which are to be transferred to an imaging sheet, is illuminated by visible light which is directed upon and controls the light valve, such that actinic radiation illuminating the light valve is modulated in accordance with the visible light; the modulated actinic radiation is directed upon the imaging sheet to form a latent image therein. In this way, the original document may be illuminated by visible light which is effectively wavelength or frequency transformed by the light valve into actinic radiation, typically in the ultraviolet range.

대표청구항 ▼

A method for exposing an imaging sheet having a layer of microcapsules on the surface thereof to form latent images in said imaging sheet, said microcapsules containing a photosensitive composition which undergoes a change in viscosity in relation to its exposure to actinic radiation, said method co

A method for exposing an imaging sheet having a layer of microcapsules on the surface thereof to form latent images in said imaging sheet, said microcapsules containing a photosensitive composition which undergoes a change in viscosity in relation to its exposure to actinic radiation, said method comprising the steps of: generating a visible light signal corresponding to the latent image to be formed in said imaging sheet by illuminating an original document with a source of visible light; directing said visible light signal onto an image-converting light valve; illuminating said light valve with a source of actinic radiation, said light valve modulating said actinic radiation; and directing said modulated actinic radiation onto said imaging sheet to form a latent image.