JP4471180B2 - Method for creating hologram display - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a hologram display, and more particularly to a method for producing a hologram display that displays a three-dimensional model or a planar image in a three-dimensional manner.
[0002]
[Prior art]
Conventionally, a three-dimensional model or a planar image is shot as separate holograms, and both reproduced images are spatially superimposed and recorded as an image superimposed on another single hologram again. Hologram displays such as graphic art holograms that are displayed three-dimensionally are known.
[0003]
[Problems to be solved by the invention]
In that case, there is a problem that the reproduction light from the background pattern is additively mixed with the reproduction light of the foreground pattern at the overlapping portion of the foreground pattern and the background pattern, and the color of the foreground pattern is changed or the contrast is lowered. .
[0004]
The present invention has been made in view of such problems of the prior art, and an object of the present invention is to superimpose a foreground pattern and a background pattern in a hologram display that displays a three-dimensional model or a planar image in a three-dimensional manner. It is an object of the present invention to provide a method for producing a hologram display body that prevents the color of the foreground pattern from changing or the contrast from being lowered in the portion.
[0005]
[Means for Solving the Problems]
The method for producing a hologram display body of the present invention that achieves the above object comprises separately producing a foreground pattern recording intermediate hologram for forming a foreground pattern image and a background pattern recording intermediate hologram for forming a background pattern image, A pattern recording intermediate hologram and the background pattern recording intermediate hologram are arranged in a superimposed manner, and diffracted light from the foreground pattern recording intermediate hologram and the background pattern recording intermediate hologram is simultaneously incident on the same photosensitive material and recorded as a hologram image. In the method of creating a hologram display,
The foreground pattern recording intermediate hologram is produced as a reflection type and volume type image hologram that does not generate any diffracted light in the reflection direction at least from outside the pattern area of the foreground pattern,
The background pattern recording intermediate hologram is a reflection type volume hologram in which no information is recorded in the portion corresponding to the pattern area of the foreground pattern, and no diffracted light is generated at least in the reflection direction from the portion. Produced as
In the production method, the foreground pattern pattern area of the foreground pattern recording intermediate hologram is aligned and superimposed so as to fill the information non-recording area of the background pattern recording intermediate hologram.
[0007]
In the present invention, since the diffracted light for reproducing the background pattern is recorded so as not to enter the pattern area of the reproduced foreground pattern, the portion of the background pattern image corresponding to the shadow of the foreground pattern image is not visible. Observe the foreground pattern image and the background pattern image with natural three-dimensional effect without changing the color or contrast of the foreground pattern image in the shadow part of the foreground pattern image and the background pattern image. Thus, a hologram display body rich in design can be obtained.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the hologram display according to the present invention will be described in accordance with a method for producing the hologram display.
[0009]
In the present invention, for example, a foreground pattern (in this case, a triangular pattern for simplification) 1 drawn on a foreground pattern board as shown in FIG. It may be recorded as a volume hologram so as to be displayed in a superimposed manner on or before. Here, it is assumed that no display pattern or color is displayed around the outline of the foreground pattern 1.
[0010]
First, as shown in FIG. 2A, a negative mask 11 in which the outside of the outline of the foreground pattern 1 is opaque and the region of the foreground pattern 1 (inside the outline) is transparent, and as shown in FIG. In addition, a positive mask 12 is prepared in which the region of the foreground pattern 1 (inside the outline) is opaque and the outside of the outline of the foreground pattern 1 is transparent.
[0011]
Next, as shown in FIGS. 3A and 3B, the negative hologram 11 and the positive mask 12 are used to irradiate the volume hologram photosensitive materials A and B such as two photopolymers with ultraviolet rays 13. As a result, the photosensitive material A expires the corresponding portion outside the outline of the foreground pattern 1 so that only the inside of the outline of the foreground pattern 1 can be recorded (photosensitive). The corresponding part in the outline of the pattern 1 is invalidated, and only the area outside the outline of the foreground pattern 1 can be recorded (photosensitive).
[0012]
Next, using such photosensitive materials A and B, the photosensitive material A has an intermediate hologram of a reflective foreground pattern 1 and the photosensitive material B has an intermediate hologram of a reflective background pattern O (FIG. 5). Prepare separately.
[0013]
FIG. 4 shows an arrangement for producing an intermediate hologram of the foreground pattern 1. A scatterer P having a pattern drawn in the area of the foreground pattern 1 is prepared, and the photosensitive material A is superimposed on the scatterer P, and simultaneously or sequentially from the photosensitive material A side at a predetermined incident angle θ. When the R, G, B 3 color illumination light 14 is incident, the illumination light 14 passes through the photosensitive material A and enters the scatterer P, and the scattered light 15 is reflected in the reflection direction from the foreground pattern 1 drawn thereon. Arise. The scattered light 15 and the illumination light 14 interfere only in the photosensitive region of the photosensitive material A, and the intermediate hologram A ′ (FIG. 6) of the foreground pattern 1 is photographed.
[0014]
The intermediate hologram A ′ of the foreground pattern 1 is a reflection-type image hologram that does not generate any diffracted light in the reflection direction from outside the outline of the foreground pattern 1, and other methods that can provide similar characteristics. Of course, it may be produced. For example, a subject corresponding to the foreground pattern 1 may be placed in front of a completely dark background and the image hologram recorded as a reflection volume hologram.
[0015]
FIG. 5 shows an arrangement for producing an intermediate hologram of the background pattern O. The above photosensitive material B is arranged in front of the background pattern O made of a planar pattern or a three-dimensional pattern, in this case at a distance L ₀ , and R, G, and R at the predetermined incident angle θ from the photosensitive material B side simultaneously or sequentially. When the B3 illumination light 16 is incident, the illumination light 16 passes through the photosensitive material B and enters the background pattern O, and scattered light 17 is generated in the reflection direction. The scattered light 17 and the illumination light 16 interfere only in the photosensitive region of the photosensitive material B (the region outside the outline of the foreground pattern 1), and the intermediate hologram B ′ (FIG. 6) of the background pattern O is photographed.
[0016]
The intermediate hologram B ′ of the background pattern O is a reflection type hologram in which no information is recorded in the portion corresponding to the outline of the foreground pattern 1 and no diffracted light is generated in the reflection direction. Of course, it may be produced by a method other than that capable of imparting characteristics.
[0017]
Next, the intermediate hologram A ′ of the foreground pattern 1 and the intermediate hologram B ′ of the background pattern O produced in this way are reversed so that the expired area fills the recording area with each other as shown in FIG. Align and superimpose. In the case of FIG. 6, the intermediate hologram B ′ is placed on the intermediate hologram A ′, but the reverse is also possible. When the reproduced illumination lights 18 of three colors R, G and B traveling in the opposite direction to the illumination lights 14 and 16 at the time of photographing are incident on the superimposed holograms A ′ and B ′ simultaneously or sequentially, the recording of the intermediate hologram B ′ is performed. Diffracted light is generated in the reflection direction from the region (the region outside the outline of the foreground pattern 1), the background pattern image O ′ is reproduced at the position of the distance L ₀ , and the recording region (the foreground pattern 1 of the foreground pattern 1) Diffracted light is generated in the reflection direction from the region in the contour), and the foreground pattern image P ′ is reproduced in the recording region. In this case, another similar volume hologram photosensitive material C is arranged at an arbitrary position, in this case, at a distance L ₂ (L ₂ <L ₀ ) from the intermediate hologram B ′, and the reproduced background pattern is reproduced. Image O ′ and foreground pattern image P ′ are recorded simultaneously.
[0018]
The hologram C ′ (FIG. 7) recorded on the photosensitive material C is the hologram display body intended by the present invention. When the hologram display body C ′ is turned upside down, as shown in FIG. When the white illumination light 19 is incident from a direction opposite to the incident direction of the illumination light 18, the background pattern image O ″ is reproduced from the hologram C ′ to the back surface position of L ₁ (= L ₀ −L ₂ ). The foreground pattern image P ″ is reproduced from the hologram C ′ to the front surface position of L ₂ .
[0019]
At this time, although it is important, the image of the intermediate hologram B ′ itself of the background pattern O is reproduced at the position of the image P ″ of the foreground pattern although it cannot be seen by the eye E. The diffracted light that reproduces the image O ″ does not enter the region B ″ corresponding to the expired region (the region within the outline of the foreground pattern 1) of the intermediate hologram B ′. This means that the eye is viewed from above in FIG. When the background pattern image O ″ is viewed at E, the region S projected on the background pattern image O ″ connecting the outline of the eye E and the region B ″ is invisible (not observable). Therefore, when the eye E is moved left and right, the invisible region S is also moved in the opposite direction. On the other hand, the image P ″ of the foreground pattern can be observed from any position of the eye E. Therefore, the image P ″ of the foreground pattern can be seen on the side close to the eye E, and the distance L ₀ = L ₂ + L ₁ behind it. Since the background pattern image O ″ can be seen only apart and the portion S corresponding to the shadow of the foreground pattern image P ″ of the background pattern image O ″ cannot be seen, the foreground pattern image P ″ and the background pattern image The color of the foreground pattern image P ″ does not change or the contrast decreases in the shadow portion of O ″, and the foreground pattern image P ″ and the background pattern image O ″ can be observed with a natural three-dimensional effect. .
[0020]
As described above, the hologram display body of the present invention has been described based on the production method. However, the present invention is not limited to the above-described embodiments, and various modifications can be made. In the arrangement shown in FIG. 7, both the foreground pattern image P ″ and the background pattern image O ″ may be formed as real images. For this purpose, in the arrangement shown in FIG. 6, the volume hologram photosensitive material C may be arranged on the background pattern image O ′. The volume hologram C ′ created as described above is used as an original, and another hologram hologram photosensitive material is superimposed on the hologram hologram to reproduce the hologram display body of the present invention. Also good.
[0021]
【The invention's effect】
As is clear from the above description, according to the hologram display body and the method for producing the same of the present invention, the diffracted light for reproducing the background pattern is recorded so as not to enter the pattern area of the reproduced foreground pattern. The portion of the pattern image corresponding to the shadow of the foreground pattern image is not visible, and the foreground pattern image does not change color or the contrast does not decrease in the shadow portion of the foreground pattern image and the background pattern image. The foreground pattern image and the background pattern image can be observed with the three-dimensional effect, and a hologram display body rich in design is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a foreground pattern according to an embodiment of the invention.
FIG. 2 is a diagram illustrating a negative mask and a positive mask used for producing an intermediate hologram corresponding to the foreground pattern of FIG.
FIG. 3 is a diagram illustrating a state in which a part of a photosensitive material for photographing an intermediate hologram is expired using a positive mask and a negative mask in FIG. 2;
FIG. 4 is a diagram showing an arrangement for photographing a foreground pattern recording intermediate hologram;
FIG. 5 is a diagram showing an arrangement for photographing a background pattern recording intermediate hologram;
FIG. 6 is a diagram showing an arrangement for photographing a hologram display body of the present invention using a foreground pattern recording intermediate hologram and a background pattern recording intermediate hologram.
FIG. 7 is a diagram for explaining a state in which a display image composed of a foreground pattern and a background pattern is reproduced from the hologram display body of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Foreground pattern 11 ... Negative mask 12 ... Positive mask 13 ... Ultraviolet 14 ... Illumination light 15 ... Scattered light 16 ... Illumination light 17 ... Scattered light 18 ... Reproduction illumination light 19 ... White illumination light E ... Eyes A and B ... Volume hologram photosensitive material C ... Volume hologram photosensitive material O ... Background pattern P ... Scattering body S ... Invisible area A 'of background pattern image ... Foreground pattern intermediate hologram B' ... Background pattern intermediate hologram O '... Background pattern Image C '... Hologram display body O "... Background pattern image P" ... Foreground pattern image B "... Background pattern intermediate hologram inactive region image

Claims (1)

A foreground pattern recording intermediate hologram that forms a foreground pattern image and a background pattern recording intermediate hologram that forms a background pattern image are created separately, and the foreground pattern recording intermediate hologram and the background pattern recording intermediate hologram are superimposed and arranged. In the method for producing a hologram display for recording a hologram image by simultaneously entering the diffracted light from the foreground pattern recording intermediate hologram and the background pattern recording intermediate hologram into the same photosensitive material,
The foreground pattern recording intermediate hologram is produced as a reflection type and volume type image hologram that does not generate any diffracted light in the reflection direction at least from outside the pattern area of the foreground pattern,
The background pattern recording intermediate hologram is a reflection type volume hologram in which no information is recorded in the portion corresponding to the pattern area of the foreground pattern, and no diffracted light is generated at least in the reflection direction from the portion. Produced as
A method for producing a hologram display body, wherein a pattern area of a foreground pattern of the foreground pattern recording intermediate hologram is aligned and superimposed so as to fill an information non-recording area of the background pattern recording intermediate hologram.

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