JP3438249B2 - Method and apparatus for producing large full-color holographic stereogram - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type full color holographic stereogram (Ture-
color Lippmann type Holog
raphicStereogram: Below, simply TLH
(Hereinafter referred to as "S"), the method for determining the optimum exposure conditions, which can be manufactured easily, stably and automatically by greatly simplifying the manufacturing process, and a manufacturing method and apparatus for a large TLHS using the same. .

[0002]

2. Description of the Related Art Conventionally, there is a two-step manufacturing method as one of the methods for synthesizing TLHS.

That is, when synthesizing a two-step TLHS, first, as a first step, as shown in the schematic diagram of the synthesizing optical system of FIG. 7, a parallax image of a red (R) component of a display object. An original image (hereinafter, simply referred to as "original image") 1 is imaged on a diffusion plate 3 by a projection lens 2 of an optical system, and a hologram photosensitive material (hereinafter simply referred to as "holographic sensitive material") 4 is formed.
To record. On the other hand, the hologram light-sensitive material 4 is caused to interfere with the parallel reference light 5 incident from above the diffusion plate 3 and recorded as an elongated element hologram. Then, the hologram photosensitive material 4 is gradually moved while changing the original image 1.

Next, the original image 1 of the green (G) component of the display object
Are recorded in the same manner as described above. The blue (B) component of the display object is also recorded by the same method as described above.

When the three stereograms obtained as described above are overlapped and reproduced with white light, the reproduced image is greatly blurred. Then, in order to reduce the blur of the reproduced image, the exposure of the next stage is necessary. That is, the HS produced by the above method is subjected to the second stage exposure as shown in FIG.

That is, the real image of the original image 1 is shown in FIG. 10 by being incident from below the HS of the red component exposed by the above operation.
Play to the position. Then, the hologram sensitive material 11 is arranged at the position of the real image position 10, the parallel reference light 12 incident from below is made incident on the hologram sensitive material 11, and the wavefront of the real image reproduced from the HS4R of the red component and the hologram. It interferes with the sensitive material 11. Then, the same hologram sensitive material 1 is used in the same manner by replacing HS4 with HS4G as a green component.
Double exposure to 1. Further, the same hologram sensitive material 11 is subjected to triple exposure by a similar method by using HS4B of blue component instead of HS4G. In this way, the operation is repeated three times to create the final TLHS11.

[0007]

However, the above-mentioned TLHS manufacturing method requires a complicated work in two steps, and the work is very complicated.
Stable production of HS cannot be performed.

Further, in order to manufacture a large TLHS,
A large optical system is required, which causes a problem of production cost.

Further, in the above-mentioned first step, there is a problem that speckle noise is conspicuous in the reproduced image and the image quality is deteriorated by using the diffusion plate.

The present invention has been made in order to solve the above-mentioned problems, and a TLHS having a large size and high image quality can be manufactured easily, stably, and automatically by greatly simplifying the manufacturing process. It is an object of the present invention to provide a method for determining an optimum exposure condition, and a method and an apparatus for manufacturing a large TLHS using the method.

[0011]

[0012] In the invention described in claim 1, a method of fabricating a full-color holographic stereogram large quality, performs taken from the viewing direction of the display object, and creating an original image, the original image, A step of setting the original image feeding means of the optical system, and a step of branching the laser beam path into a reference light beam and an object light beam after making a plurality of laser beams having different wavelengths the same path. , After the reference light beam is diffused by a special filter, it is made to be parallel light and made incident on the hologram photosensitive material set in the hologram photosensitive material feeding means from the rear side, and the object light beam is made to be convergent light to illuminate the original image, The parallel light is projected on the lens in a magnified form, and the parallel light is focused on a lenticular sheet by a cylindrical lens. After correcting the light amount unevenness due to the aberration of the field lens and the cylindrical lens by the exposure unevenness correcting means, the step of allowing the light to enter the hologram photosensitive material from the front side, and selecting one of the plurality of laser beams to select the element hologram After the exposure, the minimum resolution is obtained based on the eyesight of the observer, the observation distance, the position of the display object with respect to the hologram surface, the thickness of the hologram photosensitive material, and the F number of the cylindrical lens. According to the optimally determined exposure width and feed pitch of the element hologram, and

[Equation 3] Based on the theoretical relationship, the hologram film feed means and the original image feed means are controlled so that the hologram recording width is determined in consideration of the divergence angle of the reproduction light, and then one of the other laser beams is used. Just like selecting a beam to expose the element hologram, each time one laser beam is selected and the exposure is completed, the hologram film feeding means and the original image feeding means are sequentially controlled to be recorded to record the element hologram. Made in preparation.

Further, according to the invention as defined in claim 2 , in a device for producing a large-sized, high-quality, full-color holographic stereogram, a plurality of laser light sources for generating laser beams having different wavelengths and lasers from the respective laser light sources are provided. Light-blocking means for individually blocking the beams, optical means for making each laser beam have the same path, and optical branching for branching the laser beam path by the optical means into a reference light beam and an object light beam. A first filter, a special filter for diffusing the reference light beam, and a lens for collimating the diffused light, and making the collimated light incident on the hologram photosensitive material set in the hologram photosensitive material feeding means from the rear side. Optical system, a second optical system that illuminates the original image with the object light beam as convergent light, and after illuminating the original image A third optical system having a field lens for magnifying and projecting the light to make it parallel light, and a cylindrical lens for narrowing the parallel light from the field lens to a lenticular sheet, and making the light from the lenticular sheet enter the hologram photosensitive material from the front side. And an exposure unevenness correction unit that is disposed between the lenticular sheet and the hologram photosensitive material and that corrects the unevenness of the light amount due to the aberration of the field lens and the cylindrical lens, and one of the plurality of laser beams by the light blocking unit. Each time the element hologram is exposed by sequentially selecting, the eyesight of the observer,
The exposure width and feed of the element hologram optimally determined to obtain the minimum resolution based on the observation distance, the position of the display object with respect to the hologram surface, the thickness of the hologram photosensitive material, and the F number of the cylindrical lens. According to the pitch, and

[Equation 4] Based on the theoretical relationship, the hologram light-sensitive material feeding means and the original image feeding means are controlled so as to determine the recording width of the hologram in consideration of the spread angle of the reproduction light, and the control means for recording the element hologram is provided. Are configured.

[0014]

Therefore, in the optimum exposure condition determining method of the present invention and the method and apparatus for producing a large-scale full-color holographic stereogram using the method, a large-scale full-color holographic stereogram can be synthesized in one step, resulting in a large image quality. A full-color holographic stereogram can be easily manufactured with greatly simplified labor.

By controlling the one-step synthesizing method with a computer, the synthesizing can be automatically performed.

Further, the minimum resolution can be obtained based on the visual acuity of the observer, the observation distance, the position of the display object with respect to the hologram plane, the thickness of the hologram photosensitive material, the F number of the cylindrical lens in the optical system, and the like. By determining the optimum exposure width and feed pitch of the element hologram and providing the uneven exposure correction means, it is possible to correct the uneven light quantity due to the aberration of the field lens and the cylindrical lens. It is possible to obtain scheduling that is almost indistinguishable from the image quality of.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of the overall configuration of a large TLHS manufacturing apparatus according to the present invention.

That is, as shown in FIG. 1, the large-sized TLHS manufacturing apparatus of this embodiment has a plurality (three in this embodiment) of laser light sources 101, 102, 103 and beam shutters 104, 105 as light shielding means. , 106, mirrors 107, 108 and 109 which are optical means, a beam splitter 110 which is a light splitting means, a special filter 111, a lens 112 and a mirror 11 which constitute the first optical system.
3 and the mirror 114 and the lens 1 which constitute the second optical system.
15, an original image feeding device 116, a lens 117, a field lens 118, a cylindrical lens 119 which form a third optical system, a lenticular sheet 120, a hologram sensitive material feeding device 121, and a filter 122 which is an exposure unevenness correcting means. And a computer which is a control means (not shown).

Here, the laser light sources 101, 102, 1
Reference numeral 03 denotes laser beams having different wavelengths (red, green, and blue wavelengths in this example).

The beam shutters 104, 105,
Reference numeral 106 is for individually shielding the laser beams from the respective laser light sources 101, 102, 103 under the control of a computer.

Further, the mirrors 107, 108 and 109
Is to reflect the laser beams from the beam shutters 104, 105 and 106 substantially at right angles so that the laser beams have the same path.

Furthermore, the beam splitter 110 is
The laser beam path by the mirrors 107, 108 and 109 is branched into two beams of a reference light beam and an object light beam.

On the other hand, the special filter 111 diffuses the reference light beam split by the beam splitter 110.

The lens 112 is a special filter 1
The diffused light from 11 is converted into parallel light.

Further, the mirror 113 reflects the parallel light from the lens 112, and the hologram sensitive material feeding device 121.
The hologram light-sensitive material 123 set in (1) is made incident from the rear side.

On the other hand, the mirror 114 reflects the object light beam split by the beam splitter 110 at a substantially right angle.

Further, the lens 115 makes the object light beam from the mirror 114 convergent light and illuminates the original image 124 set in the original image feeding device 116.

Further, the original image feeding device 116 uses the original image 12
4 is set, and the original image 124 is sent in the direction of the arrow shown in the figure under the control of the computer.

On the other hand, the lens 117 enlarges and images the horizontal light after illuminating the original image 124 near the field lens 118, and enlarges the vertical light after illuminating the original image 124 near the lenticular sheet 120. It forms an image.

Further, the field lens 118 is the lens 117.
The horizontal light from is converted into parallel light.

Further, the cylindrical lens 119 is
The parallel light from the field lens 118 is narrowed down to the lenticular sheet 120, and the light from the lenticular sheet 120 is made incident on the hologram photosensitive material 123 from the front side.

On the other hand, the hologram sensitive material feeding device 121 is
As shown in FIG. 2, the hologram sensitive material 123 is set on an X-Z stage that is movable in the horizontal direction (X direction) and the vertical direction (Z direction).
The data is sent in the horizontal direction (X direction) and the vertical direction (Z direction) under the control of the computer.

The filter 122 is arranged between the lenticular sheet 120 and the hologram photosensitive material 123, and the field lens 118 and the cylindrical lens 11 are provided.
This is to correct the unevenness of the light amount due to the aberration of 9.

Further, the computer has a function of controlling opening / closing of the beam shutters 104, 105, 106 so as to sequentially select one of the three laser beams, and a laser beam to select an element hologram. Each time it is exposed, the hologram sensitive material feeding device 121 and the original image feeding device 116 are controlled to be fed to record an element hologram.

In this case, the hologram sensitive material feeding device 121
The feed control of the original image feeding device 116 is performed by the observer's visual acuity, observation distance, position of the display object with respect to the hologram surface, the thickness of the hologram photosensitive material 123, and the F number of the cylindrical lens 119 (the cylindrical lens 1).
Based on parameters such as the focal length f of 19 / diameter D of the cylindrical lens 119) and the like, the optimum exposure width and feed pitch of the element hologram are determined so as to obtain the minimum resolution, and the exposure is performed according to these.

Next, a method of manufacturing the large-size high-quality TLHS manufacturing apparatus of the present embodiment having the above-described structure will be described with reference to FIGS.

First, as a preparation, an image is taken from each viewing direction of a display subject and recorded on a color positive film to create an original image 124. That is, each color component separated from the display object, red, green, and blue are arranged in order to create a parallax original image sequence.

Next, the original image 124 created in this way
Is set in the original image feeding device 116 of the optical system shown in FIG.

Next, in such a state, the laser light source 1
The red, green, and blue wavelength laser beams from 01, 102, and 103 are shielded by the opening and closing control of beam shutters 104, 105, and 106 by a computer (not shown), and mirrors 107, 108, and 10, respectively.
Reflected at 9, each laser beam is matched to the same path. The laser beam path is split by the beam splitter 110 into a reference light beam and an object light beam.

Next, first, the reference light beam split by the beam splitter 110 is diffused by the special filter 111, becomes parallel light by the lens 112, is reflected by the mirror 113, and is reflected by the hologram sensitive material feeding device 121. It enters the hologram photosensitive material 123 from the rear side.

On the other hand, the object light beam split by the beam splitter 110 is reflected by the mirror 114,
The light is converged by the lens 115, and the original image feeding device 11
6 of the original images 124 are illuminated. And this original picture 124
The convergent light that illuminates the
7 is enlarged and projected onto the field lens 118, and the cylindrical lens 119 is used to project the lenticular sheet 12.
Narrowed down to 0. Further, with respect to the vertical direction of the converged light, it is made into parallel light by the field lens 118 and is incident on the hologram photosensitive material 123 from the front side.

As a result, the image plane of the original image 124 is enlarged and imaged near the field lens 118 by the lens 115 in the horizontal direction, and is enlarged and imaged near the lenticular sheet 120 in the vertical direction.

In this case, the lenticular sheet 1
The filter 1 is provided between the holographic material 20 and the holographic material 123.
Since the filter 22 is provided, the filter 122 corrects the uneven light amount (uneven light amount distribution) due to the aberration of the field lens 118 and the cylindrical lens 119.

Next, the element hologram is recorded by the following method.

That is, first, the red beam shutter 1
04 is opened and the red component of the original image 124 is illuminated. Then, the original image 124 is narrowed by the field lens 118 and the cylindrical lens 119 into the hologram photosensitive material 123 sensitive to the laser beams of the three primary colors to be used, and is incident. On the other hand, the reference light parallel to the hologram light-sensitive material 123 is obliquely incident from the side opposite to the above-mentioned incident light, and the original image 124
By interfering with the incident light from, it is recorded (exposed) as a red volume type element hologram having a width of about 0.2 mm. After that, the red beam shutter 104 is closed, the original image feeding device 116 feeds one frame of the original image 124, and the hologram sensitive material feeding device 121 causes the hologram sensitive material 123 to move laterally (X Direction).

Next, the green beam shutter 105 is opened to illuminate the green component of the original image 124, and a green volume type element hologram of about 0.2 mm width is recorded (exposed) by the same method as described above. To be done. At this time, between the red and green element holograms, double exposure occurs in a portion of about 0.1 mm.

Next, the blue beam shutter 106 is opened to illuminate the blue component of the original image 124, and a blue volume type element hologram of about 0.2 mm width is recorded (exposed) by the same method as described above. To be done.

Thus, the beam shutters 104, 1
05, 106, the original image feeding device 116, and the hologram sensitive material feeding device 121 are controlled by a computer (not shown) in the order of opening and closing as described above.

That is, the hologram sensitive material 123 is as shown in FIG.
As shown in FIG. 6, the hologram photosensitive material 123 is moved in the lateral direction (X direction) and in the vertical direction (Z direction). , Hologram sensitive material 12
With respect to the movement in the vertical direction of 3, the large HS can be synthesized by dividing the vertical width into several stages and connecting and exposing.

Next, in the above, the optimum exposure width and pitch of the element hologram are specifically determined by, for example, the following method.

That is, in the present invention, in order to obtain a high quality TLHS which is almost indistinguishable from an ordinary hologram, it is necessary to clarify the factors affecting the image quality of the reproduced image and to determine the optimum combining conditions. The above-mentioned parameters of the width and pitch of the element hologram have a great influence on the image quality of the reproduced image, so that optimum values are input in advance and precisely controlled. The optimum value in this case is determined by the hologram sensitive material 123, the depth of the reproduced image, the observation distance and the visual acuity of the observer, and is obtained from the following equations (1) to (4).

[0053]

[Equation 1] Here, V is the visual acuity of the observer, R is the observation distance, and ΔX is the distance from the position of the reproduction point image to the hologram surface.

By the way, in the case of 1-step pHS, it is necessary to bring the position of the reproduced image close to the hologram surface in order to reduce the blur of the reproduced image due to the color dispersion and the size of the illumination light source and emphasize the 3D depth. is necessary. However, the original images taken from each viewing direction are directly
When HS is synthesized using the stepHS optical system, the reproduced image is generally reproduced at the position of the field lens, that is, at the back of the hologram surface, and large blurring is observed. Therefore,
This reproduced image can be displayed at any position (especially near the hologram surface)
A special original image processing method has been proposed for reproduction.
It is a method in which each original image is divided into a large number of strip-shaped elements, and the final two-dimensional image is obtained from these elements by a combination process. The original image shooting interval ΔD that can be divided into the necessary element widths in this processing method is represented by the following equation according to the above-described recording pitch ΔP.

[0055]

[Equation 2] Original image 1 projected near the permissible field lens 118
The period t of 24 is

[Equation 3] Here, F # is the F-number of the cylindrical lens 119, and A is the width of the cylindrical lens 119.

From the above equations (1) to (3), for example, F # is 0.8, the ratio between the reproduced image and the subject size is 0.25,
When the observer's visual acuity is set to 1.0, the relationship between the observation distance, the observer's visual acuity, the reproduction point image position and the necessary element hologram recording pitch, the projection image cycle, and the original image capturing interval can be summarized as follows. As shown in 3.

On the other hand, one of the factors affecting the resolution of the reproduced image is the recording width of the element hologram. This recording width is obtained from the following numerical calculation.

That is, the width of the element hologram is set to H
And the thickness of the emulsion is T, the theoretical relationship between the recording width of the hologram and the divergence angle of the reproduction light in the case of laser reproduction is expressed by the following equation.

[0059]

[Equation 4] Here, E, C _r , and C _o are reproduction light, reference light, and
It means the amplitude of the object light. Also, the subscripts r, o, c, i
Denote reference light, object light, illumination light, and reproduction light, respectively.
Further, H indicates the recording width and T indicates the thickness of the emulsion.
It should be noted that K means a constant and kc and ko mean the wave numbers of the reproducing light and the recording light, respectively.

FIG. 4 is a diagram showing an example of the standard for determining the parameters of the recording pitch and the minimum resolution of the original image 124 from the above equations.

Next, in the above, the field lens 118 and the cylindrical lens 11 forming a part of the optical system.
The light amount unevenness (light amount distribution nonuniformity) due to the aberration 9 is corrected by the filter 122 as follows.

That is, there is an aberration in the synthetic optical system as shown in FIG. This aberration has a light quantity distribution shown in FIG. 5 when the illumination light of the original image is narrowed down to the hologram photosensitive material 123 in a slender manner.
It becomes non-uniform as shown in. This non-uniformity is due to non-uniform reproduction light at the central portion and the edge portion of the element when observing the hologram when the range of the linnial photosensitive property of the hologram photosensitive material 123 is exceeded or the exposure amount becomes non-uniform. As a result, a linear pattern of the element is observed, resulting in poor image quality.

Therefore, in order to improve the image quality, as shown in FIG. 5, first, under the condition that an image is not inserted, an ordinary photographic dry plate is used instead of the hologram photosensitive material 123 to perform one exposure. . After the development process of this photographic dry plate, the distribution of the amount of light due to aberration is modulated into the light and shade distribution of the photographic dry plate.
FIG. 6 is a diagram showing an example of a uniform light amount distribution of illumination light when passing through a modulated photographic dry plate.

Next, the photographic dry plate is returned to the original position, the hologram photosensitive material 123 is placed immediately after that, and the hologram is exposed by the method described above. In this way
In the hologram to be synthesized, the linear pattern of the elements becomes inconspicuous, the reproduced image can be observed smoothly, and a high quality reproduced image can be created.

That is, with respect to the horizontal direction of the object light illuminating the original image 124, the luminous flux incident on the hologram photosensitive material 123 by the field lens 118 and the cylindrical lens 119 has a width of about 0.2 mm. The light amount distribution of the thin light flux becomes non-uniform due to the aberration of the field lens 118 and the cylindrical lens 119 described above. And this non-uniformity appears as uneven exposure on the hologram surface,
It is the main cause of image quality deterioration.

Therefore, as described above, by disposing the filter 122 between the lenticular sheet 120 and the hologram sensitive material 123, such uneven light amount (uneven light amount distribution) can be corrected.

As described above, the large TL according to this embodiment
The HS manufacturing method and apparatus have the following various effects.

(A) In the present embodiment, a large TLHS can be synthesized in one step, as compared with the conventional complicated synthesizing method that divides the exposure process into several steps, so that a high quality T
The LHS can be extremely easily manufactured by greatly simplifying the manufacturing process.

(B) Since the computer controls the one-step synthesizing method, the synthesizing can be performed automatically.

(C) Observer's eyesight, observation distance, position of display object with respect to hologram surface, hologram sensitive material 123
The optimum exposure width and feed pitch of the element hologram are determined based on parameters such as the thickness of the optical system and the F number of the cylindrical lens 119 in the optical system, and the filter 122 serving as exposure unevenness correction means is determined. Since it is possible to correct the light amount unevenness due to the aberration of the field lens 118 and the cylindrical lens 119, it is possible to manufacture a large-sized high quality TLHS that is almost indistinguishable from the quality of an ordinary hologram.

(D) In the conventional method for manufacturing a large HS, a large optical system had to be used, whereas in the present embodiment, there is no parallax in the vertical direction of the hologram, and in the vertical direction. By utilizing the feature that the reproduction light is diffused only in the vertical direction, the large TLHS manufacturing method makes it possible to efficiently manufacture a large HS while making the optical system small.

That is, the hologram sensitive material 123 can be moved in the lateral direction (X direction) and the vertical direction (Z direction) by X.
-Because it is set on the Z stage, the horizontal movement becomes the pitch of the element hologram, and the vertical movement divides the width in the vertical direction into several steps to combine and expose a large HS. You can

[0073]

As described above, according to the present invention, the optimum exposure condition that enables large-scale, high-quality TLHS to be manufactured easily, stably, and automatically with greatly simplifying the manufacturing process. Determination method and large TLHS using it
The manufacturing method and apparatus of can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a large TLHS manufacturing apparatus according to the present invention.

FIG. 2 is a perspective view showing a configuration example of an XZ stage in the embodiment.

FIG. 3 is a relationship diagram for explaining a method of determining an optimum exposure width and pitch of an element hologram in the same example.

FIG. 4 is a diagram for explaining a method of determining an optimum exposure width and pitch of an element hologram in the example.

FIG. 5 is a characteristic diagram for explaining a method of correcting light amount unevenness due to aberration of the optical system in the example.

FIG. 6 is a diagram for explaining a method of correcting unevenness in light amount due to aberration of the optical system in the example.

FIG. 7 is a schematic diagram for explaining a conventional TLHS two-step manufacturing method.

FIG. 8 is a schematic diagram for explaining a conventional TLHS two-step manufacturing method.

[Explanation of symbols]

101, 102, 103 ... Laser light source, 104, 10
5, 106 ... Beam shutter, 107, 108, 10
9 ... Mirror, 110 ... Beam splitter, 111 ... Special filter, 112 ... Lens, 113 ... Mirror, 114
... Mirror, 115 ... Lens, 116 ... Original image feeding device, 1
17 ... Lens, 118 ... Field lens, 119 ... Cylindrical lens, 120 ... Lenticular sheet, 121
… Holographic sensitive material feeding device, 122… Filter, 12
3 ... Holographic material, 124 ... Original image.

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Claims (2)

(57) [Claims] 1. A method for producing a large-size, high-quality, full-color holographic stereogram, a step of taking an image from each viewing direction of a display subject to create an original image, and setting the original image on an original image feeding means of an optical system. And a step of branching the laser beam path into two, a reference light beam and an object light beam, after making a plurality of laser beams having different wavelengths on the same path, and a special filter for the reference light beam. After it is diffused as parallel light, it is made incident on the hologram photosensitive material set in the hologram photosensitive material feeding means from the rear side, and the object light beam is converged to illuminate the original image, and then enlarged and projected on the field lens. To make parallel light, and the parallel light is focused on the lenticular sheet by a cylindrical lens to expose. Correcting the light amount unevenness due to the aberration of the field lens and the cylindrical lens by the correction means, and causing the light to enter the hologram photosensitive material from the front side; and selecting one laser beam from the plurality of laser beams to select the element hologram. After the exposure, the minimum resolution based on the visual acuity of the observer, the observation distance, the position of the display object with respect to the hologram surface, the thickness of the hologram photosensitive material, the F number of the cylindrical lens, and the like. According to the exposure width and feed pitch of the element hologram that are optimally determined so that Based on this theoretical relationship, the hologram film feeding means and the original image feeding means are controlled by determining the recording width of the hologram in consideration of the divergence angle of the reproduction light, and then one of the other laser beams is controlled. Just as one laser beam is selected to expose the element hologram, each time the exposure is completed by selecting one laser beam, the hologram film feeding means and the original image feeding means are sequentially controlled to record the element hologram. And a step for producing a large-scale full-color holographic stereogram. 2. A device for producing a large-scale, high-quality full-color holographic stereogram, a plurality of laser light sources for generating laser beams having different wavelengths, and a light shield for individually shielding the laser beams from each of the laser light sources. Means, optical means for causing each of the laser beams to have the same path, optical branching means for branching the laser beam path by the optical means into a reference light beam and an object light beam, and the reference light A first optical system having a special filter for diffusing the beam and a lens for collimating the diffused light, and making the collimated light incident on the hologram photosensitive material set in the hologram sensitive material feeding means from the rear side; A second optical system for illuminating the original image with the object light beam as convergent light; and light after illuminating the original image Having a field lens for projecting and projecting parallel light into parallel light, and a cylindrical lens for narrowing parallel light from the field lens into a lenticular sheet, and allowing light from the lenticular sheet to enter the hologram photosensitive material from the front side. An optical system, an exposure unevenness correction unit that is disposed between the lenticular sheet and the hologram photosensitive material, and corrects the uneven light amount due to the aberration of the field lens and the cylindrical lens, and one of the plurality of laser beams. Each time a laser beam is sequentially selected by the light shielding means to expose the element hologram, the visual acuity of the observer, the observation distance, the position of the display object with respect to the hologram surface, the thickness of the hologram photosensitive material, and the F number of the cylindrical lens. Minimal decomposition based on parameters such as According exposure width and feed pitch element holograms optimally determined so as to obtain the, and Equation 2] Based on the theoretical relationship, the hologram light-sensitive material feeding means and the original image feeding means are fed and controlled so as to determine the recording width of the hologram in consideration of the spread angle of the reproduction light, and a control means for recording the element hologram. An apparatus for producing a large-scale full-color holographic stereogram, comprising: