CH683386A5 - Slide. - Google Patents

Abstract

The invention relates to a photographic slide, the image on which reproduces not only all the hues but also all the tones of the image brillance to supplement them by an additional covering image with all the image points in register, thus producing a fully modulated image, the imprint of which theoretically consist only of variations in light intensity, which is best achieved by the generation of a white second image with identical image points.

Description

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description

The present invention relates to a fluoroscopic image with increased visual contrast.

It is known that a photo or transilluminated image (slide) looks much more impressive than a normal top view, which is why the light advertising industry is a large consumer of slide images.

It is also known that the eye can only perceive elements that have a visual contrast and differ optically from the surrounding image elements by color or light intensity. The stronger the visual contrast or the energy difference of an image acting on the retina, the better an image will be perceived.

It is known that various silhouetted image display methods allow individual elements of an image to be taken out of the overall image concept in a significant manner and brought to special attention.

Contrary to such image representations, which partially represent contrasting image details, the present invention is based on the task of creating new light images which have a higher visual contrast over their entire surface and thus have a better perceptibility.

The object of the invention is achieved by means of a fluoroscopic image which consists of a first color image and a second image which controls the light intensities, the said image controlling the light intensities being a light image which is complementary in design and has the same position and is formed by points with different light transmissions and points is.

According to the invention, a normal halftone, screened or pure line image in white is preferably added to the normal slide image, which corresponds to the color image point by point and congruently.

The invention makes it possible to create new light images which have a translated, fully modulated visual contrast by means of the finest, graduated image-reproducing, complementary control of the light energies flowing through, i.e. a photographic image reproduction is produced by image-changing changes in the light energy units flowing through the image.

Analogous to four-color printing, where black is the fourth color, according to the invention, in most of the exemplary embodiments, neutral white is required as the fourth color for the slide images.

When viewing images according to the invention, the eye receives an additional light energy contrast, and therefore such images will be described as more attentive and brilliant than all conventional slide images.

Advantageous embodiments of the invention result from the dependent claims.

The present invention is explained in more detail by the following detailed description.

A practically simple and cheap solution to achieve the object of the invention is to generate a white image in which a proportion of white particles or white pigments are contained.

The image-wise distribution of the white particles on transparent plates or film material can be produced by all printing methods known today, a white pigment being used instead of black color. Electrostatic copiers and electronically controlled imaging devices can be used without significant differences.

There are other ways of producing the second image that controls the light intensities, for example with the help of optically active substances and polarized light: with the help of an electronically controlled inkjet printer, left-handed polarizing substances are sprayed onto a transparent material to produce a copy of the color image. The color image and copy are overlaid. The color image is illuminated using a right-handed polarized light source. The light is dimmed according to the copy image without changing the light color. The only disadvantage of this system is that a part of the radiation energy is already lost in the polarization of the light source.

There is also the possibility of achieving a similar light control by means of a silver mask, which not only results in a loss of the continuous light intensity, but can also lead to undesired color changes.

Other practical ways of producing such white images are to use UV-sensitive photo layers to which white pigments have been added, for example insensitive polymers which contain titanium dioxide as the white pigment. The photo layer is exposed over the image, so that a 1: 1 copy of the fluoroscopic color image is created and the more or less hardened photo layer is washed out in different places, so that less or more TÌO2 is washed out.

An overview of these films containing white pigments can be found, for example, in:

- UV Curing: Science and Technology / Ed. S. Peter Pappas: Technology Marketing Corporation, Stamford-Conn; 1978

- Photopolymers: principles and application / Hans Joachim Timpe, Harald Baumann, German publishing house for basic materials industry, Leipzig; 1988

With a very high density of white parts and hard image development, the white images produced in this way can advantageously be rasterized, so that the high coverage by the white pigment layer does not clog the color tones of the light image to be examined.

An even simpler practical solution to achieve the object of the invention is to produce a white image without any pigment particles. As the most usable and already machine-ready material for the production of the

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Weissbilder has shown the use of a non-colored, color-neutral modification of the UV-reactive film produced by KALLE (Wiesbaden / Germany) under the name "OZAPHAN VESICULAR TYPE A" for the microfilm industry. N2 gas is generated in this film by UV radiation and subsequently inflated by heating to about 100 ° C, a pigmentless, pure white foam is formed, which has no color cast and is not destroyed or changed except by overheating and besides that The advantage of this is that no chemical, possibly toxic, developer products have to be used for image development.

In this preferred embodiment, the slide film produced according to the invention consists of a transparent substrate material, the back of which is matted for the purpose of optical light scattering. On its front side, the same carrier film contains a UV formulation, which generates the white layer through gas formation and, superimposed on it, the different colored image emulsions.

According to the invention, the color image and the white image can also be produced independently and subsequently linked to form an image according to the invention.

In practice, there are various ways of producing such white images, mainly with the aid of UV-sensitive photo layers to which white pigments have been added. However, the producibility of such images can be questioned by toxic components, expensive processing instalations and yellowness of the end product. In general, when producing such pictures, the selection of materials and components must be made taking into account their more or less great toxicity, the more or less expensive processing installation and the possible yellowness of the end product.

In a normal white image recording, the darker shade corresponds to a relatively high density of white components, while the lighter areas only have a reduced density of white components, and with very bright image elements, the white image component may even be completely suppressed, which then is necessary for transparent images Light scattering is advantageously replaced by an optical, lens-like light scattering, or by a full-surface, bright, opal light diffusing screen, or by a uniformly slightly white-pigmented diffusion disk, but this entails a certain loss of light. The optical scattering layer can also act as a protective film of the white layer, either to the outside or to the chemical components of the color layer, in which case the scattering layer is between the color film and the white film, the color image on the front and the white image on the back of the scattering layer .

The color image belonging to the fluoroscopic image according to the invention can be produced by means of any color film emulsion customary for transparencies. Color pigments, be they diazo products or others, are generally relatively expensive. In slide-color film emulsions, an approximately twice as high density of color pigments is usually used as in conventional overlay images (paper images). In a particularly preferred embodiment of the slide-color film complex according to the invention, one is now used as the color film which has only halftone values of the color pigment densities customary for slides. In other words, in this preferred embodiment, the color image portion of the film emulsion is applied in the same proportions with respect to its color pigment density as in an ordinary paper image. The advantages that result from this are the following:

a) For cheap goods, only a color film is used, and developing the white image behind the dark image elements prevents them from being too intensely illuminated and produces a somewhat acceptable slide image. Film and development costs are cheaper, and if a white plexiglass is added to the back of such a color image, such a color image can be used as both a top and a slide image at the same time.

b) For high-quality see-through images, two identical color images are precisely adjusted one after the other in order to maintain the color intensity of a full-tone slide.

c) When using two such films of identical structure, the white image can be:

- flat screen with certain intensity,

- halftone image,

- line drawing,

- Image with certain sections are developed, whereby several of these possibilities can be used simultaneously, in particular the two white images can be developed differently.

d) An intermediate layer of a white diffusion film with a particularly high level of light reflection results in a color image that represents a high-quality supervisory image in the blazing sun and leads to a high-quality slide image in reduced ambient light.

e) The development of the white image requires UV exposure, and this exposure can be produced through the already developed halftone color image (with a normal slide, which has a double proportion of color pigments, the direct generation of the white image through the color layer is difficult, because it clogs the passage of UV rays too much).

f) The use of two films with halftone color values also has the consequence that such an image complex also has two optical light diffusion layers, which produces a higher degree of scattering of the transmitted light.

The production of inventive 5

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Illuminated images are discussed below using some examples of the development processes:

Example 1:

White image development with the help of an electro-graphic blueprint machine.

The photocopier unit, for example OZALID-EF1000 (Hoechst), is filled with white toner instead of black toner. Since black areas where the original is dark are usually formed on the copy in photocopying units, when white toner is used, the dark areas of the image correspond to the white areas of the white image. The original color slide is copied 1: 1 onto transparent material in white directly into positive. The white copy obtained in this way is combined with the ink carrier film in order to produce the fluoroscopic image according to the invention.

Example 2:

Development of color and white images, which are on two different film carriers.

First, the color slide is developed. Through contact breaks (UV or normal light) the color image 1: 1 creates a transparent negative image, which must correspond to the contrast and the desired white image extract. The transparent negative is placed on the unexposed white film in daylight. In the contact process, the white film is exposed through the negative film in a closed light box with 260 W / m2 with SYLVANIA UV tubes No.G3078 (radiation 85% at 253.7 nm) at a distance of 15 cm for 3 minutes (blueprint installations like that REGMA D540 can process white film in a continuous process). After exposure, the white film is developed immediately at a speed of about 60 cm / minute past a heating shoe at 100 ° C to form a white image.

Example 3:

Development of color and white image, which are on the same film carrier.

In terms of layers, the layers of color are on the side facing the image viewer, while on the back of these layers of color there is a layer producing gas bubbles. First, a normal color slide is developed. After the development of the dye has ended, contact breaks with a normal light source (without UV) produce a negative image which is darkest where the most light has passed through the color slide. This negative is either made soft, hard, rasterized or with extracts of important details (as desired). The color image is placed on the stomach and in its back, directly against the white layer side, the negative for creating the white image is placed. The UV rays penetrating through the negative effect a decomposition of the photochemical layer proportional to the effect of light with the production of N2 gas,

which, when inflated to about 100 ° C, creates the white image layer.

Example 4:

Development variant of color and white image with uniform film carrier for dye and white layer.

In the case of a flat color image, the white layer is exposed to UV radiation directly through the dye layer. One waits until the N2 gas formed has diffused out of the layer support film and subsequently exposes the image to the back on the side facing away from the dye layer with UV, so that the positive white image is developed as a residual development. The overall development speed of such an inverse white image development depends on the structure of the more or less N2 gas permeable intermediate layers.

Example 5:

Development of a color white film complex with halftone color pigment density.

After the color image has been developed, the white image is developed into a positive image by waiting about a day after the UV exposure. During this period, the N2 gas released by UV radiation escapes from the film layer into the open and can therefore no longer be inflated to the white image by means of heat. The next day, the white film layer side is exposed to the entire surface and without shielding from UV radiation; the remaining N2 gas development produces the desired positive white image after exposure to heat.

The present invention can also be summarized as follows:

It relates to a see-through image (slide), the image recording of which not only reproduces all colors, but also, according to the invention, also replicates all the nuances of the image brilliance in a complementary manner by means of an added image recording with identical pixels, whereby a fully modulated congruent second image is generated, the drawing of which is theoretically only consists of differences in light intensity, which according to the invention can best be achieved by generating a second image in white with the same pixel.

Claims (17)

Claims 1. fluoroscopic image with increased visual contrast, characterized in that the fluoroscopic image consists of a first color image and a second image that controls the light intensities, said image controlling the light intensities being a complementary design of the color image and stored at the same point and having different light transmissions formed photo is. 2. fluoroscopic image according to claim 1, characterized in that the second image is an image composed of optically active, polarizing substances. 5 10th 15 20th 25th 30th 35 40 45 50 55 60 65 4th 7 CH 683 386 A5 3. fluoroscopic image according to claim 1, characterized in that the second image is a white image. 4. fluoroscopic image according to one of claims 1 to 3, characterized in that the second, the light intensity controlling image is on an independent, the color image complementary film. 5. fluoroscopic image according to one of claims to 3, characterized in that the second, the light intensity controlling image with the color image represents a common film composite. 6. fluoroscopic image according to one of claims 1 to 5, characterized in that it is coupled with an optical light diffusion film. 7. fluoroscopic image according to one of claims 1 to 6, characterized in that it is coupled with a pigmented light diffusion film. 8. fluoroscopic image according to one of claims 1 to 7, characterized in that the second, the light intensities controlling image is an image produced by a printing method. 9. fluoroscopic image according to one of claims 1 to 7, characterized in that the second, the light intensity controlling image is an image produced by a photographic method. 10. fluoroscopic image according to one of claims 1 to 7, characterized in that the second, the light intensities controlling image is an image produced by an electronic copying method. 11. X-ray image according to one of claims 1 to 10, characterized in that the second image, which controls the light intensities, is an image produced by means of a raster image. 12. X-ray image according to one of claims 1 to 11, characterized in that the second image, which controls the light intensities, is an image produced with the aid of UV-sensitive emulsions. 13. X-ray image according to one of claims 3 to 12, characterized in that the second, the light intensity controlling image is an image produced with the aid of chemicals which release gas under exposure, these chemicals being able to produce a film containing gas bubbles, in order thus to form a film to lead pigment-free white image. 14. fluoroscopic image according to one of claims 1 to 13, characterized in that said first color image is an image produced with the aid of color film emulsions which have color pigment densities corresponding to an ordinary paper image. 15. X-ray image according to claim 14, characterized in that it has two color images superimposed at the same point. 16. X-ray image according to claim 15, characterized in that there is a diffusion layer between the two color images. 17. fluoroscopic image according to one of claims 1 to 16, characterized in that it is a Biid produced by means of DIAZO products. 5 10th 15 20th 25th 30th 35 40 45 50 55 60 65 5