JP2533835B2 - hologram - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hologram manufacturing method, and more particularly to a method for providing a hologram that provides a superior stereoscopic effect as well as various distinct visual sensations depending on an observation angle.

(Prior Art) Various transmission-type and reflection-type holograms in which interference fringes obtained by causing information light and reference light to interfere with each other are recorded on a photosensitive material are conventionally known, and various information is recorded, reproduced, and reflected. In the case of a mold, it is also used as various decorative materials.

In any of these types, these holograms are characterized in that they can reproduce a recorded image three-dimensionally, which is very different from a conventional flat image.

(Problems to be Solved by the Invention) Although the above-mentioned general hologram image is excellent in stereoscopic effect, it is impossible to change the image itself into another image, and in this respect, the hologram image is limited. was there.

Therefore, it has not been known at all that even one hologram has an image that changes, and if the formation of such a variable image is realized, further expansion of the application of the hologram is expected.

As described above, the inventor of the present invention has earnestly attempted to obtain a hologram which has not been known at all in the past, that is, a hologram in which another image is generated only by changing the viewing angle of the viewer even if it is one hologram. As a result, by adopting a specific subject in the hologram manufacturing method,
It was found that the object of the present invention was achieved.

(Means for Solving Problems) That is, according to the present invention, the first graphic and the second graphic showing the moire phenomenon are sequentially arranged at different distances from the photosensitive material and at a time. The hologram is imaged on the same surface as the image, and the imaged image is reproduced as an image having a moire phenomenon.

The present invention will now be described in more detail with reference to the accompanying drawings. Each operation of the hologram manufacturing method used in the present invention is the same as a conventionally known hologram manufacturing method, and a conventionally known hologram, for example, a method for manufacturing a hologram such as a Fresnel hologram, a Fourier transform hologram, or a Fraunhofer hologram. Any of the hologram manufacturing methods such as image holograms, rainbow holograms and holographic stereograms utilizing these hologram formats can be used in the present invention.

An example thereof will be described with reference to FIG. 1. For example, in FIG. 1, the photographing light 2 emitted from the light source 1 is split into two light fluxes by the half mirror 3, and one light is reflected by the mirror 4 and the lens. After passing through 5a, the object 6 is transmitted or reflected and reaches the photosensitive material 8 as information light 7. The other light reaches the photosensitive material 8 as the reference light 9 via the mirror 3 and the lens 5b. The information light 7 and the reference light 9 interfere on the photosensitive material 8, and the interference light obtained by the interference is exposed to the photosensitive material 8 to photograph the object 6. A desired hologram is formed by developing the photosensitive material 8 according to a conventional method.

In the above description, two objects to be photographed are used, but these two objects to be photographed have a relationship indicating moiré development.
These two figures are holograms, which are different figures in terms of time and distance. For example, first, hologram recording is performed on the object 6a at a predetermined distance from the photosensitive material, and then, on the object 6b, the object 6a is captured.
A hologram is similarly photographed at a position different from.
In the example shown in FIG. 1, two objects are used,
Instead of this, a similar hologram is formed even if one of the objects to be photographed having the first shape and exhibiting the moire phenomenon is displaced and used twice.

These holograms are general transmissive holograms as they are, and when a reflective hologram is required, a reflective metal layer may be formed on one surface of the obtained hologram. Further, when these holograms need to be duplicated, a metal layer may be formed on the uneven surface of the hologram, and the uneven shape may be transferred to another material having a mature formability by using this as a mold.

The main feature of the present invention is that a plurality of images 6a and 6b that cause moiré development are used as the object to be photographed in the above-described hologram manufacturing method or a hologram manufacturing method other than the above.
The point is that (figure) is adopted. Further, instead of a plurality of images, one reflection type image may be used twice. In this case, the same effect can be obtained by first exposing one image at the position 6a or 6b, then shifting the image to the position 6b or 6a and then performing the second exposure. .

The moire development is a well-known development in the field of printing technology, and as an example, as shown in FIGS. 2 and 3, a large number of lines or dots (FIG. 1) are formed on the same or different lines. Or, by also serving as a figure consisting of dots, it is a phenomenon in which a pattern different from any of the original figures (Figs. 3a and 3b) is visually recognizable depending on the overlapping manner. The resulting pattern is the second
There are innumerable other than those shown in FIG. 3 and FIG. 3, and any of them can be used in the present invention.

In the present invention, 2 which causes moire development in this way
The individual figures (6a and 6b) are used as the object 6 with a certain distance (for example, several mm to several meters) as shown in the first drawing. Further, as described above, the same effect can be obtained by using one figure twice.

By using an object to be imaged which causes such moiré development with an object to be imaged by any of the heretofore known hologram manufacturing methods, these two figures are three-dimensionally recorded in the photosensitive material as a hologram and the desired hologram is obtained. Is obtained.

(Operation / Effect) As described above, when the hologram obtained by the present invention is irradiated with reproduction light, or a reflective layer is provided on the back surface of the holograum, the hologram is observed and the figure 6a and the figure 6b are three-dimensionally formed. When the hologram is observed at a vertical angle in order to be reproduced, the figure 6a and the figure 6b are completely coincident with each other as shown in FIG. 2, and thus the observed figure is as shown in FIG. When the hologram is observed at another angle, for example, a pattern that is not in any of the original figures is observed, as shown in FIG. 3a. When the angle is further changed, for example, as shown in FIG. 3b. , A pattern different from any of the original patterns and further different from the pattern of FIG. 3a will be observed.

The above examples are merely examples for explaining the present invention, and the figures that cause moire development usable as a subject in the present invention are not limited to the examples of FIG. 2 and FIG. And straight lines, straight lines, curves and straight lines with different line thickness, or those lines that are dotted lines,
Further, any combination such as a set of random points is possible, and the figures to be combined may be the same or different figures. Further, the number of figures to be combined is not limited to two, and is three or more. The same effect can be obtained, and in the case of one figure, this figure can be photographed a plurality of times, and if the number of times is increased, a more complex and various different visual feeling can be given.

Therefore, according to the present invention as described above, the conventional hologram gives a three-dimensional visual sensation, and the visual sensation itself did not change, whereas the hologram according to the present invention, Not only the stereoscopic effect but also a large number of completely different patterns can be revealed, which gives an excellent visual feeling that cannot be achieved by the conventional hologram.

The hologram according to the present invention as described above is particularly useful as a decorative material or the like because it gives a unique visual sense as described above, for example, a stock certificate, a gift certificate, a gift certificate, a check, a company ticket, a stamp, a stamp, Bills, various certification cards, passbooks, membership tickets, invitation tickets, admission tickets, book tickets, beer tickets, lottery tickets, lottery tickets, airline tickets, boarding tickets, insurance certificates, other valid securities, or further labels, By sticking or incorporating it on a part of the voucher, it is possible to impart excellent decorativeness to those articles, and such a hologram of the present invention does not show the above-mentioned effects of the hologram of the present invention when copied. Since it will be lost, it is effective in preventing forgery of important documents and important properties.

 Next, the present invention will be described more specifically with reference to examples.

Embodiment 1 In this embodiment, as the object to be photographed, a reflection type original having a concentric circle pattern as shown in FIG. 2 is used.
The first exposure and photographing were performed at the position 6b in the figure, and then the same original was shifted to the position 6a 10 mm behind the position 6b and the second exposure and photographing were performed. Exposure and photography were performed as follows.

Using an Argon laser, a beam splitter, a mirror and a lens arranged as shown in FIG. 1, a photosensitive material (AZ-1350J, manufactured by Zipley Co., Ltd.) having a thickness of 2.5 μm is formed on a glass substrate.
The subject to be photographed was photographed as a fullel hologram at the position 6b on a dry plate coated on m, then the subject was shifted to the position 6a, and similarly photographed. , AZ Developer) to make a relief hologram and then use silver on the hologram surface to reduce the thickness to 40
It was vapor-deposited so as to have a thickness of 0 angstrom, and further, nickel was plated to have a thickness of 1 mm by using a silver vapor-deposited film as an electrode and peeled off to form a mold having a reverse shape of a relief hologram.

Separately, aluminum is vapor-deposited on a polyvinyl chloride sheet having a thickness of 0.4 mm as a base material so as to have a thickness of 500 angstrom, and the metal mold surface of the reverse-shaped mold of the relief hologram is superimposed on the vapor-deposited surface. A mirror plate was superposed on the plate and heated and pressed under the conditions of 150 ° C., pressure 10 kg / cm ² , and pressure for 5 minutes using a heat press, and then cooled to obtain a reflection relief hologram. If you observe this hologram from the front,
Although the visual sensation is given as shown, different patterns were observed depending on the observation angle as shown in FIGS. 3a and 3b by changing the observation angle.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a hologram manufacturing method of the present invention, and FIGS. 2 and 3 are schematic diagrams of an example of a subject to be used in the present invention and effects of the present invention. FIG. 1; light source, 2; shooting light 3; half mirror, 4; mirror 5; lens, 6; object 7; information light, 8; photosensitive material 9; reference light

Claims (1)

(57) [Claims] 1. A first graphic and a second graphic exhibiting a moire phenomenon are hologram-photographed on the same surface of the photosensitive material in sequence at different distances from the photosensitive material and at a time interval. A hologram, wherein the figure is reproduced as an image having a moire phenomenon.