摘要:
The invention relates to a method for the production of a multilayer image, preferably a multicolor image, wherein a transfer foil placed on a paper substrate and treated with laser radiation is used. The transfer foil has a laser-sensitive layer (4) and a background layer (5) arranged thereunder. The laser-sensitive layer (4) consists of laser-sensitive material, e.g. laser-sensitive pigments or other laser-sensitive colorants. The laser-sensitive material is bleached in certain areas in the layer (4) by means of laser radiation, thereby resulting in a so-called laser-induced image component (10). Due to the fact that said image component is transparent or semi-transparent, the background layer (5) arranged thereunder, which can have a printed image (5d), is visible from above in said area. A multilayer image is obtained, which is jointly formed by the laser-induced image component (10) and the background layer (5).
摘要:
The invention relates to a method for producing a multicolor image. To this end, a transfer film is preferably used, which has a laser-sensitive layer (4). The laser-sensitive layer (4) is made from a mixture consisting of three constituents. The constituents are coloring agents, especially pigments, e.g. cyan pigment, magenta pigment and yellow pigment, which can be decolorized by laser radiation. According to the method, only one of the pigment constituents is decolorized at a time in the individual steps by setting laser conditions that are specific to each of the different pigment components. This means that by treating a specified location with a laser, only a first constituent of the mixture comprised of three constituents is decolorized by laser irradiation in a first step. In a possible second step, only one other constituent is decolorized and in a possible third step, only one third constituent is decolorized. The color at the relevant location is produced by the subtractive mixture of colors of the remaining constituents that have not been decolorized.
摘要:
A platemaking system uses an intermediate imaging mask (10) made of a film of photochromic material (14), preferably bacteriorhodopsin. The film is nominally opaque, but is temporarily made transparent by exposure to light of a certain wavelength. An image is formed on the mask using light (18) of the appropriate wavelength, which renders portions of the mask transparent. The mask is then interposed between a photosensitive printing plate (20) and a light source (24) which produces light to which the plate is sensitive, exposing the printing plate and thereby transferring the desired image onto the plate. The described method is preferably implemented using a transparent rotating drum (30) that is coated with a bR film (31). As the drum rotates past a green or yellow laser (34), a desired image (32) is written onto the film by the laser's beam. The drum rotates the image until it is opposite a photosensitive printing plate (36), and a light source (38) inside the drum exposes the plate through the mask to transfer the image. The system preferably includes another light source (44) that is directed onto the formed image after it has been transferred which 'erases' the film and thus prepares it to accept a new image.
摘要:
Photographic process, in which a substrate comprising a plurality of superimposed layers of photochromic materials sensitive to different light wavelengths is provided. The object to be photographed is scanned and a digital file defining the image of the object is generated from the scanning. A plurality of sources of laser light having different wavelengths, each of which is the wavelength to which one of the photochromic materials is sensitive is provided and the layers of photochromic materials are irradiated by means of the laser beams produced by the sources, according to a program determined by the digital file, whereby to develop in each pixel of the substrate the color that it has in the image. The colors thus generated in the pixels of the substrate layers; and the background areas of the substrate layers are set.
摘要:
A photochromic product of curing is produced by irradiating a photopolymerizable composition comprising: (A) a radical-polymerizable monomer, (B) an ultraviolet polymerization initiator exhibiting a main absorption in the ultraviolet region and a molar absorption coefficient of 150 1/(mol.cm) or above at 400 nm, and (C) a photochromic compound with an active energy radiation exhibiting an emission spectrum at 400 nm or above as the main spectrum to cure the composition. The above composition can easily be polymerized in a short time to give a product of curing exhibiting excellent photochromism.
摘要:
Disclosed herein is a recording/reproducing method for an optical recording medium comprising a step of heating a recording layer containing a photochromic material and a polymer which are so combined with each other that a photostationary state attained upon irradiation with light of a specific wavelength is varied with temperatures, and a step of applying the light of a specific wavelength to the heated recording layer for bringing the same into a photostationary state and recording information. In order to reproduce the information, a portion of the recording layer which is in a photostationary state is selectively heated, and reproducing light is applied to reproduce recorded and unrecorded states.
摘要:
An optical memory device comprising: a transparent substrate; and a recording film deposited on the transparent substrate, the recording film being formed by preparing a composition in which a diarylethene-type photochromic compound is dispersed in an ultraviolet-curing polyurethaneacrylate resin of solventless type and by curing the composition by an ultraviolet ray irradiation.