WO2000075732A1

WO2000075732A1 - Hologram label and method for making the same

Info

Publication number: WO2000075732A1
Application number: PCT/JP2000/003777
Authority: WO
Inventors: Yuji Aizawa; Hideo Kibata; Kazuyuki Kurihara
Original assignee: Asahi Glass Company, Limited
Priority date: 1999-06-09
Filing date: 2000-06-09
Publication date: 2000-12-14
Also published as: JP2001056633A

Abstract

A method for making a hologram label, especially a hologram used as ornament for vehicles, having a more free designability, imparting a feeling of higher grade, and having an originality and a novelty, and a hologram label made by the method. Incoherent light from a light source (23) is applied from the light-shielding mask (22) side to make a partially unexposed hologram photosensitive material (21). A transparent sheet having an embossed pattern is disposed on the object light input side in relation to the material (21). The unexposed portion is exposed to coherent reference light and the object light.

Description

Specification

Technical field

The present invention relates to a method for producing a hologram in which predetermined display drawings such as characters and marks are recorded on a hologram, and a hologram label produced by the method. Technology background

Conventionally, vehicle ornaments that are attached to a vehicle body surface or a window glass surface to show a manufacturer's emblem, a vehicle name, a vehicle classification, and the like to an observer outside the vehicle have been used. This ornament is usually made by subjecting an injection-molded product such as ABS (acrylonitrile butadiene styrene) or PPE (polyphenylene ether) to surface treatment such as plating, and attaching it to a predetermined place on the vehicle body using double-sided adhesive tape. Used with. In recent years, from the viewpoint of improving the design of the entire vehicle, there has been a demand for improved design, luxury, novelty, and novelty of vehicle ornaments.

Therefore, it has been proposed to use a hologram for a vehicle ornament. A hologram is a method in which light incident on a hologram from a predetermined direction is reflected and diffracted, and allows the observer to visually recognize the diffracted light. If an image is recorded on the hologram in advance, the observer can visually recognize the image . If a hologram is created so that the hologram folds the light (for example, sunlight or streetlights) from outside the vehicle, a novel image can be visually recognized by the observer depending on the degree of incidence of the light. A method for producing such a hologram is disclosed, for example, in Japanese Patent Application Laid-Open No. 11-095645.

However, characteristics such as the appearance of the hologram depend on the conditions at the time of fabrication, and the image recorded on the hologram is observed with the same wavelength light incident from the same direction as the condition at the time of fabrication. For this reason, the vehicle ornament using the hologram proposed in the above-mentioned Japanese Patent Application Laid-Open No. 11-095645 has an effect as a hologram, but the design of characters and the like is further improved. It is required to have freedom of quality, luxury, novelty and novelty. An object of the present invention is to solve the above-mentioned problems, and to provide a method for producing a hologram which is a vehicle ornament having more freedom of design and further luxury, novelty and novelty. . Disclosure of the invention

In order to achieve the above object, the present invention provides a method for producing a hologram, comprising: arranging a light-shielding mask having a light-shielding portion of a predetermined pattern on a planar hologram photosensitive material; Irradiating non-coherent light from the light-shielding mask side to form a partially unexposed hologram photosensitive material; and a transparent plate having an uneven pattern at the object light incident side position of the partially unexposed hologram photosensitive material. A hologram manufacturing method, comprising: arranging a reference light and an object light toward different surfaces of the partially unexposed gram-gram photosensitive material, respectively. The present invention also provides a method for producing the hologram, wherein the non-coherent light is ultraviolet light.

The present invention also provides a method for producing the hologram, wherein the transparent plate has a periodic pattern having a depth of 0.1 mm to 5 mm and a pitch of 0.2 mm or more. Further, a reflection type hologram label for displaying a predetermined pattern, wherein a hologram part where a periodic pattern provided for the part of the predetermined pattern is recorded, and a part other than the predetermined pattern Provided is a hologram label including a provided non-hologram part.

The present invention also provides the hologram label, wherein the pitch of the periodic pattern is 0.2 mm or more.

Further, the present invention provides the hologram label, wherein the hologram label is used for a vehicle.

The present invention also provides the hologram label, wherein the hologram label is installed on a window glass of a vehicle.

Further, the present invention provides the hologram label, wherein the hologram label has a protective layer.

Further, the hologram label, wherein the hologram label has an adhesive layer, provide.

Further, the present invention provides the above-mentioned hologram label, wherein the hologram material of the hologram label is made of an acrylic photopolymer.

Here, the hologram label is a generic term for ornaments, emblems, and the like formed by recording predetermined display drawings such as characters and marks on the hologram.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic perspective view for explaining a first step in a method for producing a hologram according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an optical system in a second step performed after the step of FIG. (A) of FIG. 3 is a diagram showing a front pattern of the transparent template 13, and (b) is a partial cross-sectional view taken along the line D-D shown in FIG. 3 (a).

FIG. 4 is a front view of the hologram manufactured in the present embodiment.

FIG. 5 is a schematic cross-sectional view showing a basic layer configuration of a vehicle ornament using a hologram according to the present invention.

FIG. 6 is an example of a light-shielding mask used in the first step of the hologram manufacturing method of the present invention.

FIGS. 7A and 7B are diagrams showing a transparent template having a concavo-convex pattern used in the first step in the method for producing a hologram of the present invention, wherein FIG. 7A is a front view, and FIG. FIG. 8 is a front view of an ornament using a mouth gram produced by the method for producing a mouth gram according to the present invention.

FIG. 9 is a cross-sectional view of the ornament of FIG. 8 taken along line BB.

FIG. 10 is a schematic sectional view when the ornament of FIG. 8 is attached to a window glass of an automobile.

FIG. 11 is a front view when the ornament of FIG. 8 is attached to a window glass. FIG. 12 is a front view when the ornament of FIG. 8 is attached to another window glass. BEST MODE FOR CARRYING OUT THE INVENTION

The hologram manufacturing process is roughly divided into two parts below. The second step means a step of preparing a mouthgram part.

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic perspective view for explaining a first step in a hologram manufacturing method according to an embodiment of the present invention.

A light-shielding mask 22 having a light-shielding portion of a predetermined display pattern is arranged on one surface side of the hologram photosensitive material 21. In the figure, the hologram photosensitive material 21 and the light-shielding mask 22 are separated from each other, but are actually arranged in close contact. Then, non-coherent light is emitted from the light source 23 toward the hologram photosensitive material 21 through the light shielding mask 22. Thus, a partial unexposed hologram having an unexposed portion of the predetermined display pattern (the ABC character portion in the figure) and a portion excluding the unexposed portion and exposed to non-coherent light. It becomes photosensitive material 21.

FIG. 2 is a schematic configuration diagram showing an optical system in a second step performed after the step of FIG.

The partially unexposed hologram photosensitive material 21 produced as described above is attached to the holding substrate 12. Further, outside the holding substrate 12, a transparent template 13 having a three-dimensionally patterned uneven surface is further arranged close to the holding substrate 12.

Then, coherent light is emitted from the exposure light source 14 and split into two directions by the beam splitter 15 .The mirrors 16 a and 16 b, the objective lenses 17 a and 17 b, and the The light is collimated through the meter lenses 18a and 18b. One of the above-mentioned divided parallel light is irradiated to the transparent mold plate 13, transmitted therethrough, and irradiated as object light toward the partially unexposed hologram photosensitive material 21. . The other light is irradiated onto the partially unexposed hologram photosensitive material 21 as parallel light as reference light.

In this way, the unexposed portion of the hologram photosensitive material 21 receives the object light (template image) and the reference light and is exposed. The produced hologram is a hologram on which a template image in a predetermined display / drawing shape is recorded. Then, reproduction light (for example, sunlight, streetlights, or light from other vehicles) incident from a predetermined direction is reproduced as a template image, and can be visually recognized by an observer as a display drawing of a predetermined pattern. FIG. 3 (a) is a diagram showing a front pattern of the transparent template 13 and FIG. 3 (b) is a partial cross-sectional view taken along line D-D shown in FIG. 3 (a).

As shown in FIGS. 3 (a) and 3 (b), the transparent mold plate 13 of the present embodiment regularly has the same irregular pattern of the grid arrangement at the pitch h (about 3.5 mm in the present embodiment). The center of one cell has a depth d (in this embodiment, about 1 mm). In the present embodiment, Mitsubishi Rayon Co., Ltd. uses a trademark (trade name: Acrylate-1 K5 (alias: diamond)) made of a PMMA (polymethyl methacrylate) material. It is also effective as a transparent template in K-1 (aka Kasumi).

Here, the depth of the transparent template 13 in the thickness direction is preferably 0.1 mm or more. With a pattern having a depth smaller than 0.1 mm, the reproduced image of the hologram does not have a three-dimensional effect. The maximum depth is preferably up to about 5 mm. If the depth of the hologram is about 5 mm or more, the reproduced image of the hologram will be blurred under the diffused reproduction light, and the quality of the ornament will be reduced. Further, the pitch of the pattern is preferably about 0.2 mm or more as the vicinity of the limit that can be recognized by a human in a normal state. The maximum pitch is preferably large enough to show an effect when compared with the pattern of the light-shielding mask 22. If the pitch exceeds the line width of the pattern of the light-shielding mask 22, the pattern of the transparent mold plate 13 is formed. Disappears.

FIG. 4 is a front view of the hologram manufactured in the present embodiment. Only the “ABC” of the character portion 51 a of the hologram 51 in the figure has a partially recorded template image, and the peripheral portion 51 b other than the character portion has no coherence shown in FIG. 2 in advance. It was not recorded as a hologram because it was exposed to light. The optimal pitch for the pattern of the irregularities of the transparent template 13 is such that a small number of the two or three patterns are within the line width of the pattern of the light-shielding mask 22 (corresponding to the character portion 51a). It is preferable because it is not too large or too large and is easily recognized.

FIG. 5 is a schematic sectional view showing a basic layer configuration of a vehicle ornament using a hologram according to the present invention.

The hologram 51 (51 a is a portion where an image is recorded, 51 b is a portion where no image is recorded) is laminated between the transparent adhesive layers 52 and 53. On the side of the observer Has a transparent protective layer 54, and a visible light absorbing layer 55 on the back side of the hologram. The visible light absorbing layer 55 is for improving the appearance of the hologram, and is preferably a black type. It is preferable that an ultraviolet absorber is provided to the transparent adhesive layer 52 in order to protect the hologram from ultraviolet rays.

The ornament film composed of this hologram can be configured such that an adhesive layer is further provided on the outer surface of the visible light absorbing layer 55 and directly adhered to the vehicle body surface or the window glass surface.

In the hologram 51a, a pattern for displaying and drawing characters and marks is recorded. The light incident on the hologram from any direction is diffracted toward the outside of the vehicle at a wide angle, and an observer outside the vehicle visually recognizes the displayed image.

In the present invention, the hologram usually has a thickness of about several / m to several hundreds of πι and an appropriate area, and if it has an optical diffraction function, a hologram is widely called a Lippmann type, an embossed type, a rainbow type, or the like. Applicable. As the horodaram photosensitive material, various photosensitive materials such as dichromated gelatin, photo resist, polybutyl carbazole-based photopolymer, and acryl-based photopolymer can be used. Among these recording materials, acrylic photopolymers are preferred because all processes of hologram preparation after laser beam irradiation can be processed in a dry manner, handling is easy, productivity is high, and durability is high.

Non-coherent light can be obtained from various light sources, such as a metal halide light source that emits near-ultraviolet light, a xenon lamp, a mercury lamp, and an incandescent lamp. In this case, it is determined according to the sensitivity of the hologram photosensitive material, the degree of exposure, the light shielding performance of the light shielding mask, and the like. The range of light energy required, the number m J / cm ² from a few hundred m JZ cm ² can be exemplified. In the above example, it was irradiated energy amount of about 1 O mj Z cm ² in the hologram photosensitive material using metal halide de source. When the non-coherent light is ultraviolet light, it is easily absorbed by the photopolymer, and the photopolymerization reaction proceeds, which is preferable. A laser is used as the exposure light source 14, and the wavelength is set to, for example, 555.5 nm in consideration of laser irradiation of the hologram photosensitive material and shrinkage due to heating.

The display drawing is appropriately selected depending on its use and decorativeness, and examples include a company emblem of a manufacturer, a name of a vehicle name, a character pattern indicating a vehicle classification, a logo, and the like. PT

7 At the time of fabrication of a frontal gram, by adjusting the incident angle of the light source for exposure to the frontal gram photosensitive material, the diffraction wavelength and the diffraction angle of the diffracted light at the time of reproduction can be made desired. Further, by appropriately selecting the angle of incidence on the hologram of the reproduction light source and the wavelength of the light at the time of reproduction, it is possible to obtain an aperture graph having a desired diffraction wavelength and diffraction angle.

Therefore, the center diffraction wavelength, incident angle, and diffraction angle of the hologram are appropriately determined in consideration of the installation angle of the hologram, that is, the installation position of the ornament, the incident direction of external light, the display direction of the display pattern, and the like.

In the above embodiment, the reflection hologram is produced by irradiating the object light and the reference light from both side surfaces of the partially unexposed hopper gram, respectively. To form a transmission hologram. Example

[Example 1]

FIG. 6 shows a light-shielding mask having a light-shielding portion of a display pattern used in the first step of producing a hologram of the present invention. In this light-shielding mask, the size of the character "AGC" in the figure had the same outer dimensions as the pattern finally displayed on the hologram. This light-shielding mask was produced by screen-printing a black paint having no light transmission on a transparent glass substrate. The line width of the pattern of the character "AGC" was about 1 Omm, and the external dimensions of the character were 110 mmte X 36 mmr¾.

The material of the light-shielding mask is not limited to the transparent glass substrate described above, and may be any material having a light transmitting property, such as an acrylic, polycarbonate, or polyethylene plastic substrate or film.

The printing of the light-shielding mask is not limited to screen printing, but may be silk printing or the like, or may be vacuum deposition or sputtering of a metal such as chrome instead of printing. The light-shielding mask is disposed opposite to the hologram photosensitive material, a light-shielding mask side using a xenon (X e) lamp was irradiated with light amount of E Nerugi one 5 O m J / cm ² in the hologram photosensitive material, the letter "AGC A partially unexposed hologram was prepared. In the second step of hologram fabrication, as shown in the optical system layout in Fig. 2, the reflective volume PT / JP00 / 03777

8 In order to produce a phase hologram, the above partially unexposed hologram was subjected to laser exposure toward two surfaces of the hologram photosensitive material. The laser light source 14 used was an Ar + -laser device, and the wavelength used was 514.5 nm.

The laser beam split by the beam splitter 15 into a collimator lens 18a and 18b is converted into a parallel beam with a diameter sufficient to cover the partially unexposed hologram character "AGC" by the collimator lenses 18a and 18b. By irradiating a partially unexposed hologram, interference fringes were recorded in this hologram. The incident angle of the reference light was 60 degrees, and the incident angle β of the object light was 13 degrees.

Amount of energy of the laser beam irradiated to the hologram of the part unexposed was 60 m J Ζ cm ^L.

FIG. 7 (a) shows a front view of the transparent template 13 having an uneven pattern (three-dimensional pattern) formed in the characters of the hologram, and FIG. 7 (b) shows a cross-sectional view taken along line AA. The transparent template 13 used was a transparent acrylic plate having a thickness of 5 mm, and the uneven pattern formed on the surface of the transparent acrylic plate was a two-dimensionally spread square grid. The pitch of the square grid was 2.5 mm (the width of the projections was 0.8 mm, the width of the depressions was 1.7 mm), and the depth of the depressions was 0.5 mm.

This transparent acryl plate is preferably arranged near the partially unexposed hologram on the object light side when exposing the partially unexposed hologram with laser light.In the present embodiment, L = 3 mm (see FIG. 2). ) Met.

[Example 2]

FIG. 8 shows a front view of a hologram ornament used in the ornament (or emblem) using the hologram formed in the letter “AGC” having the irregular pattern formed in the first embodiment. The ornament was designed to be attached to the surface of the window glass of a car, and the dimensions of the ornament were 130 mm wide x 5 Omm high.

FIG. 9 is a cross-sectional view of the ornament of FIG. 8 taken along line BB. Reference numeral 91 denotes an adhesive layer that is in contact with the exterior surface of the window glass 95 of the automobile, and is an acrylic adhesive having a thickness of 25 μπι and containing an acrylate copolymer as a main component. In addition, a silane coupling agent was added to further improve the adhesion to glass. Reference numeral 92 denotes a hologram layer produced here, and a 20-m-thick acryl-based photopolymer (trade name of DuPont: OmniDex 706M) was used as a hologram photosensitive material.

Reference numeral 94 denotes a protective layer for protecting the hologram from the environment outside the vehicle, and has a thickness of

It is a 25-m polyfluorobutyl resin film (trade name of DuPont: Ted 1 ar). Here, as the physical properties required for the protective layer, scratch resistance, weather resistance, and transparency are important. The physical quality of the protective layer tends to degrade the appearance of the hologram.

Reference numeral 93 denotes an adhesive layer for adhering the hologram layer and the protective layer, which is a 20 / m-thick acryl-based adhesive mainly composed of an acrylate copolymer. The adhesive had an ultraviolet absorber added to protect the hologram from ultraviolet light, resulting in a total hologram ornament thickness of 9 Om.

FIG. 10 shows a schematic cross-sectional view when the hologram ornament is attached to a window glass of an automobile. The window glass 101 is a fixed side window at the rear of the vehicle, and is fitted to the vehicle body 103 via the mall 107.

Around the surface of the window glass 101 on the vehicle interior side, a black ceramic print 102 is preliminarily applied. In this embodiment, the hologram ornament 104 was attached to the outside glass surface facing the black ceramic printing surface at the lower end of the window glass 101.

Usually, the glass of the side fixed window of a car is tilted about 10 to 30 degrees from the vertical direction, so it is necessary to determine the hologram reflection direction in consideration of this tilt angle. In this embodiment, since the inclination angle γ of the window glass is 20 degrees from the vertical direction, the diffraction design angle of the hologram is such that the external light 105 is at an angle of 65 degrees from the horizontal direction and the hologram ornament 104 is And the diffracted light of the character “AGC” of the hologram ornament 104 is emitted at an angle of 20 degrees from the horizontal direction. The observer 106 visually recognized the diffracted light. At this time, the reproduction wavelength of the hologram ornament 104 is about 5

30 nm.

Figure 11 shows a front view of the hologram ornament when it is pasted on the window glass. You. The back side of the hologram ornament 104 attached to the front surface of the window glass was black, so it could be recognized clearly and brightly. Note that the same reference numerals in FIG. 11 as those in FIG. 10 indicate the same elements as those in FIG.

[Example 3]

Since all of the hologram ornaments manufactured in Example 1 have optical transparency, they can be attached to the all-optical aperture of the window glass of an automobile. Figure 12 shows a front view of the hologram with the ornament attached to another window glass. This window glass is also a fixed window at the rear of the car. The hologram ornament 104 was attached to the outer surface of the vehicle at the light opening of the window glass. The same reference numerals in FIG. 12 as those in FIG. 10 indicate the same elements as those in FIG.

The hologram owner 104 did not obstruct the vehicle occupant's view of the outside of the vehicle through the window glass. Also, when observing the hologram ornament from outside the car, the inside of the car was always longer than the outside, so the observer could see the ornament display bright enough.

Therefore, the ornament of the hologram produced in Example 1 can be used by being attached to the surface of any place such as the surface of a window glass of an automobile or the surface of a vehicle body. However, it is desirable to select an adhesive material or an adhesive material having an optimum adhesive strength as appropriate, taking into consideration the material of the surface to which the hologram is to be attached. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, the pattern of display drawing of a character, a mark, etc. can be recorded as a hologram which can emphasize a three-dimensional state, and even under diffuse illumination, a display drawing can be visually recognized without blurring a three-dimensional image. In addition, the design of the ornament is improved, giving a sense of luxury.

In particular, after exposing the non-interfering light to the portion of the Holodaram photosensitive material excluding the pattern to be recorded, the pitch of the irregular pattern on the transparent template and the line width of the pattern of the light-shielding mask are preferably balanced. By doing so, it is easy for the observer to recognize and the outline of the reproduced image (display drawing) by the completed hologram becomes clear, and blur and distortion 7

11 You can display a unique drawing.

Claims

The scope of the claims

1. A method for producing a hologram, comprising: arranging a light-shielding mask having a light-shielding portion of a predetermined pattern opposite to a planar wedge-shaped photosensitive material; Irradiating coherent light to form a partially unexposed hologram photosensitive material, and arranging a transparent plate having an uneven pattern at an object light incident side position of the partially unexposed vogue gram photosensitive material. Exposing each of the partially unexposed hologram photosensitive material to a different surface of the photosensitive material with reference light and object light, respectively.

2. The method according to claim 1, wherein the non-coherent light is ultraviolet light.

3. The method for producing a hologram according to claim 1, wherein the transparent plate has a periodic pattern having a depth of irregularities of 0.1 111111 to 5 111111 and a pitch of 0.2 mm or more. Law.

4. A reflection-type hologram label for displaying a predetermined pattern, wherein the hologram part is provided with a hologram part in which a periodic pattern provided for the part of the predetermined pattern is recorded, and is provided on a part other than the predetermined pattern. The mouthless crumb venoret consisting of a non-mouthed gram portion.

5. The hodala murabenore according to claim 4, wherein the pitch of the periodic pattern is 0.2 mm or more.

6. The holo-kuramurabenore according to claim 4 or 5, wherein the hologram label is used for a vehicle.

7. The mouth gram labenole according to claim 6, wherein the hologram label is installed on a window glass of a vehicle.

8. The hollow hologram label according to any one of claims 4 to 7, wherein the hologram label has a protective layer.

9. The holocaura murabenore according to any one of claims 4 to 8, wherein the mouthpiece gram label has an adhesive layer.

10. The hologram label according to any one of claims 4 to 9, wherein the hologram material of the hologram label is made of an acrylic photopolymer.