EP0000570A1 - Original d'un porteur d'informations optique et procédé pour la réalisation de l'original - Google Patents

Original d'un porteur d'informations optique et procédé pour la réalisation de l'original Download PDF

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Publication number
EP0000570A1
EP0000570A1 EP78100480A EP78100480A EP0000570A1 EP 0000570 A1 EP0000570 A1 EP 0000570A1 EP 78100480 A EP78100480 A EP 78100480A EP 78100480 A EP78100480 A EP 78100480A EP 0000570 A1 EP0000570 A1 EP 0000570A1
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EP
European Patent Office
Prior art keywords
relief
original
partial images
areas
recording layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP78100480A
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German (de)
English (en)
Other versions
EP0000570B1 (fr
Inventor
Roland Dr. Moraw
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Hoechst AG
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Hoechst AG
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
    • G03F7/001—Phase modulating patterns, e.g. refractive index patterns
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C9/00—Stereo-photographic or similar processes

Definitions

  • the invention relates to an original one.
  • Information carrier consisting of a recording layer applied to a carrier material, which contains a relief image representing the information, the relief image being composed of a plurality of relief partial images adjoining one another without overlap in one plane, to which a relief grid with different lattice depths in the areas of the individual relief partial images is superimposed, and a method for producing the original.
  • a nickel matrix with different relief depth is created separately, with which the separate embossed images are created.
  • the relief depths are different, with the relief depth being greatest for the cyan extract and smallest for the yellow extract.
  • a disadvantage that complicates the introduction of this technique is the complex manufacturing process with three completely separate work steps for producing the individual embossed relief images corresponding to the color separations. Another disadvantage is that the three separate relief images are put together to fit the duplicate image required for the color projection.
  • the relief image is then composed of the relief partial images corresponding to the individual color separations in such a way that differently colored areas, which in the case of rasterized images can also be halftone dots, are arranged in one plane, the differently colored areas not overlapping but at most touching.
  • Relief images of this type are very well suited for displaying flat, multicolored templates, such as graphic representations, in the form of relief grid structures in one plane.
  • German patent application P 26 57 246.3 works with three basic colors, which are generally not for the presentation of colorful templates similar to a template with mixed colors, for example of colorful landscapes, are sufficient.
  • the object of the invention is to provide an original of an information carrier which is suitable for the reproduction of any, complete color images, including mixed colors.
  • This object is achieved according to the invention in that at least four relief partial images with lattice structures of different depths are provided in one plane corresponding to the projection colors yellow, red, blue-violet, green.
  • the advantage is achieved that by the exposure of the recording layer with the color separation templates of a color system from only four basic colors, namely blue-violet, green, yellow and red, a relief image of an original is obtained, with which, as a result, in a single plane existing lattice structures with a single embossing these four basic colors and all the mixed colors that can be obtained therefrom by nesting can be obtained for a complete color image.
  • the also known additive process is based on the basic colors violet (6), green (4) and red (5).
  • Yellow (1) is formed, for example, from green (4) and red (5) light.
  • Blue (2) and magenta (3) are formed accordingly.
  • a picture element for example a halftone dot, consists of a green (4), red (5) and violet color filter area (6), as shown in FIG. 2.
  • the color filter areas are arranged next to one another in one plane without overlaps. If all three color filter areas are irradiated, the halftone dot appears white; if only one or two color filter areas are irradiated, the projected halftone dot is colored in accordance with one or the two irradiated color filter areas.
  • the undesired color component cannot be effective by covering the relevant color filter area, for example by developing silver grains in a photographic layer. It is obvious that the brightness of projected color images using the additive technique is not as great as that of color images using the subtractive technique, since in the first case only two partial areas of the halftone dot are irradiated, while in the second case all three partial areas are irradiated.
  • Another disadvantage of the additive technique described is the division of the Image elements, usually raster dots, in smaller areas, because this increases the requirements regarding the positioning accuracy for color separation templates when exposing the photoresist layer through different color separation templates.
  • the color system according to the invention produces projection images that are as bright as the subtractive color system and avoids the difficulties with regard to the positioning accuracy that occur with the additive method. It also offers the advantage of complete image storage in the form of relief grid structures on one level.
  • the color image to be reproduced is rasterized, ie the image area is broken down into small sections.
  • Each halftone dot area that is not black or white contains only one of the four primary colors.
  • Mixed colors are formed by nesting differently colored halftone dots, whereby the halftone dots of one color can also have different intensities. This is shown schematically in FIG. 3, in which, in addition to the four primary colors, the mixed colors blue (3), yellow-green (8), magenta (3) and orange (9) can be seen.
  • White halftone dots (10) remain transparent, black halftone dots (11) are as little translucent as possible.
  • the respective color intensity is determined by the color-generating area portion 12 of the respective raster element 13.
  • the color-producing area portion 12 can contain raster elements 13 of all gradations between full color coverage with 100% coverage of homogeneous color and with a lack of color coverage.
  • Colorful images are reproduced with the help of four partial images, which generate the primary colors blue-violet / green / yellow / red, with the aid of corresponding grid structures in one plane by projection with the aid of imaging optics.
  • the grid structures can be designed as grid points for color matching.
  • the technique according to the invention can also be used in the case of images by means of rastered optics such as lattice grids made of cylindrical lenses or cross louvres made of spherical lenses, for which a raster-like image decomposition is also required.
  • the lattice constant for the relief lattice should be selected so that it is in the first diffraction diffracted light falls on the intermediate lens areas of the lenticular screen.
  • the number of basic colors can be expanded beyond four. In most cases, the color rendering with four primary colors is quite satisfactory.
  • White image areas are formed at grid-free image areas or at image areas with structures that only have a relatively small diffraction effect.
  • the color black which in practice is often approximated by deep dark brown or deep dark violet, is based on strongly structured image areas that do not show a pronounced color effect. For example, very deep browns or blues occur in relief gratings in photoresists with a rectangular cross section at grating depths between 0.5 ⁇ m and about 1 ⁇ m.
  • the relief structure is first produced in photoresist layers.
  • a nickel matrix is removed from the relief grids in the photoresist layers and is used to emboss a thermoplastic film made of, for example, polyvinyl chloride. If the refractive index of the photoresist layer and the refractive cortex of the thermoplastic film are equal, for example 1.5, there is no color distortion on the embossed images. If there are differences in the refractive indices, the relief depth in the photoresist layer must be set so that the embossed image correctly reflects the desired projection colors . A measure of the depth adjustment is the optical path length difference d given by the grating depth.
  • n 1 - n 2 refractive index of the lattice material
  • n 2 refractive index of the outer medium
  • the four primary colors blue-violet, green, yellow and red are obtained with optical path length differences of approximately 0.3 / 1.2 / 0.6 / 0.8 ⁇ m, this corresponds to relief depths in the photoresist between approximately 0.6 ⁇ m and 2.1. ⁇ m.
  • Suitable methods for creating relief images are specified in patent application P 26 57 246.3.
  • a photoresist layer on a glass or film carrier is exposed by color separation templates, in the sense of the present invention by one each for blue-violet, green, yellow and red, in such a way that relief structures of the desired grating depth have arisen at the relevant image points after development.
  • White areas of the image are formed by overexposure or underexposure.
  • Black image areas are formed by exposure using suitable templates to produce structures that are as panchromatic as possible to deflect the projection light. Special care is required to ensure that the originals are correctly placed on the photoresist layer, especially for rasterized images.
  • the usual 120 rasters 120 raster periods / cm
  • finer rasters up to halftone dots of 10 ⁇ m in diameter
  • the color separation templates used are so ensure that they are only transparent in the areas to be imaged.
  • the variant is possible that at least: white or more originals are transparent.
  • Great care is required in terms of lattice exposure, in particular the contact between the photoresist and the lattice template.
  • the exposure is preferably carried out in a spindle press, shown schematically in FIG. 5, as an angular frame 14 with a light inlet opening 15 and a spindle 16.
  • An arched spindle head 1 carries an elastic layer 18, which as the recording material from a support 19 and a film layer 2 against the grid template 21 presses.
  • Focal length f 15 cm and through a blue glass filter with maximum transmission of 75% of the light intensity at 400 nm wavelength.
  • the original is coated with a thin electrically conductive layer on which a metal coating is deposited. Then the original and the metal coating, whose contact surface with the original represents the negative relief image of the original, are separated from one another.
  • a deformable material from which the information carrier is produced for example polyvinyl chloride, is embossed with the metal die thus produced in a manner known per se under pressure and under mostly temperature-related viscosity reduction.
  • An approximately 2.5 pm thick layer of positive photoresist is applied to a bare transparent polyester film by spinning and drying. This layer is then brought under pressure into contact with a grid of 600 lines / mm made of metal webs on a glass plate and irradiated with actinic light with an energy of 280 mWs / cm 2 . This light energy is required for the grid-shaped exposure of the photoresist layer up to the polyester carrier.
  • the first order of colors is due to increasing grating depths in the recording layer, while the reversal of the color sequence is the result of decreasing grating depths due to overexposure of the layer.
  • the different color separation templates are placed one after the other with a grid pattern corresponding to a 120 grid in contact arrangement, and the exposure time is different depending on the desired projection color.
  • the color separation templates are only transparent at the locations of the desired projection colors and at the white image areas.
  • the registration of the color separation templates on the recording layer is done with the help of register marks under yellow safety light under a microscope.
  • the black separation template contains a grid pattern of approx.
  • the light energies for the exposure through the color separation templates were set at 105/125/140/205 mWs / cm 2 .
  • the developed relief image was then evaporated with a thin copper layer on which nickel was electroplated.
  • a polyvinyl chloride film was embossed in a press at approx. 130 C using the nickel die produced.
  • the relief image created in the polyvinyl chloride film by a single embossing produced a colored image when projected in the undiffracted beam path, which largely resembled the projection image from the original relief image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Holo Graphy (AREA)
EP78100480A 1977-08-01 1978-07-24 Original d'un porteur d'informations optique et procédé pour la réalisation de l'original Expired EP0000570B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2734581 1977-08-01
DE2734581A DE2734581C2 (de) 1977-08-01 1977-08-01 Original eines Informationsträgers und Verfahren zum Herstellen des Originals

Publications (2)

Publication Number Publication Date
EP0000570A1 true EP0000570A1 (fr) 1979-02-07
EP0000570B1 EP0000570B1 (fr) 1981-01-14

Family

ID=6015338

Family Applications (1)

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EP78100480A Expired EP0000570B1 (fr) 1977-08-01 1978-07-24 Original d'un porteur d'informations optique et procédé pour la réalisation de l'original

Country Status (7)

Country Link
US (1) US4269915A (fr)
EP (1) EP0000570B1 (fr)
JP (1) JPS5436956A (fr)
AT (1) AT373698B (fr)
CA (1) CA1109313A (fr)
DE (2) DE2734581C2 (fr)
IT (1) IT7850547A0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006504A1 (fr) * 1978-06-16 1980-01-09 Hoechst Aktiengesellschaft Cliché transparent de sélection de couleurs et méthode pour sa préparation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2853953A1 (de) 1978-12-14 1980-07-03 Hoechst Ag Identifikationskarte
US4737448A (en) * 1986-03-31 1988-04-12 Xerox Corporation Color images formed by multiple diffraction gratings
US5264880A (en) * 1991-12-30 1993-11-23 Xerox Corporation Method and apparatus for projecting a color image
US5217832A (en) * 1992-01-23 1993-06-08 The Walt Disney Company Permanent color transparencies on single substrates and methods for making the same
US5503902A (en) * 1994-03-02 1996-04-02 Applied Physics Research, L.P. Light control material

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189911466A (en) * 1899-06-02 1900-04-28 Thomas Thorp Improvements in the Method of and Means for Rendering Photographic and other Pictures of Objects Visible in their Natural or in other Desired Colours.
DE140907C (fr) * 1899-03-07 1903-05-11
GB190606825A (en) * 1905-10-19 1906-09-27 Herbert Eugene Ives Improvements in Diffraction Colour Photographs and Mode of Making same
FR2299661A1 (fr) * 1975-02-03 1976-08-27 Rca Corp Procede et appareil de filtrage chromatique soustractif
NL7700486A (nl) * 1976-01-19 1977-07-21 Rca Corp Subtractief brekingslichtfilter.
DE2703160A1 (de) * 1976-01-27 1977-07-28 Rca Corp Musteraufnahme fuer die anfertigung von subtraktiven beugungsfarbfiltern
DE2657246B1 (de) * 1976-12-17 1978-02-23 Hoechst Ag Original eines Informationstraegers,Verfahren zum Herstellen des Originals,Verfahren zum Herstellen einer Matrize zum Praegen des Orginals sowie Informationstraeger,der mit der Matrize hergestellt ist

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US2875047A (en) * 1955-01-19 1959-02-24 Oster Gerald Photopolymerization with the formation of coherent plastic masses
US4006018A (en) * 1968-05-10 1977-02-01 Minnesota Mining And Manufacturing Company Copying in color
US3672894A (en) * 1970-04-27 1972-06-27 Gen Electric Method for making a composite back projection screen
US3834801A (en) * 1970-09-21 1974-09-10 Staley Mfg Co A E Reflective elements
US3743507A (en) * 1970-10-23 1973-07-03 Rca Corp Recording of a continuous tone focused image on a diffraction grating
US3763296A (en) * 1971-03-05 1973-10-02 American Charts Co Method for making colored
US3732363A (en) * 1971-08-16 1973-05-08 Columbia Broadcasting Syst Inc Information record utilizing diffraction grating and methods of recording and reproducing the information thereof
US3947105A (en) * 1973-09-21 1976-03-30 Technical Operations, Incorporated Production of colored designs
US3993489A (en) * 1973-11-14 1976-11-23 Monsanto Company Multi-color laminate of photopolymer that is image-wise hydroperoxidized
US4017158A (en) * 1975-03-17 1977-04-12 E. I. Du Pont De Nemours And Company Spatial frequency carrier and process of preparing same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE140907C (fr) * 1899-03-07 1903-05-11
GB189911466A (en) * 1899-06-02 1900-04-28 Thomas Thorp Improvements in the Method of and Means for Rendering Photographic and other Pictures of Objects Visible in their Natural or in other Desired Colours.
GB190606825A (en) * 1905-10-19 1906-09-27 Herbert Eugene Ives Improvements in Diffraction Colour Photographs and Mode of Making same
FR2299661A1 (fr) * 1975-02-03 1976-08-27 Rca Corp Procede et appareil de filtrage chromatique soustractif
NL7700486A (nl) * 1976-01-19 1977-07-21 Rca Corp Subtractief brekingslichtfilter.
DE2703160A1 (de) * 1976-01-27 1977-07-28 Rca Corp Musteraufnahme fuer die anfertigung von subtraktiven beugungsfarbfiltern
DE2657246B1 (de) * 1976-12-17 1978-02-23 Hoechst Ag Original eines Informationstraegers,Verfahren zum Herstellen des Originals,Verfahren zum Herstellen einer Matrize zum Praegen des Orginals sowie Informationstraeger,der mit der Matrize hergestellt ist

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
E.J. WALL: "The History of Three Color Photography", 1925, American Photographic Publishing Co. Boston, Seiten 670-681. *
J.S. FRIEDMAN: "History of color photography", second edition, 1968. The Focal Press London, Seiten 23-33. *
NATURWISSENSCHAFTEN, vol. 63, No. 4, April 1976, M.T. GALE et al.: "Farbenphotographie ohne Farbstoffe und Silber", Seiten 180-184. *
OPTICS COMMUNICATIONS, vol. 18, No. 3, August 1976, K. KNOP: "Color pictures using zero diffraction order of phase grating structures", Seiten 298-303. *
SMPTE JOURNAL, vol. 87, No. 1, Januar 1978. M.T. GALE et al: "Embossed relief images and their application for color motion pictures", Seiten 6-8. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006504A1 (fr) * 1978-06-16 1980-01-09 Hoechst Aktiengesellschaft Cliché transparent de sélection de couleurs et méthode pour sa préparation

Also Published As

Publication number Publication date
AT373698B (de) 1984-02-10
DE2734581C2 (de) 1979-02-15
ATA554578A (de) 1983-06-15
EP0000570B1 (fr) 1981-01-14
CA1109313A (fr) 1981-09-22
IT7850547A0 (it) 1978-07-31
DE2860324D1 (en) 1981-03-12
JPS5436956A (en) 1979-03-19
DE2734581B1 (de) 1978-06-01
US4269915A (en) 1981-05-26

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