JP3321957B2 - Hologram manufacturing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a Lippmann hologram, and more particularly to a hologram capable of continuously recording individual information such as a serial number or characters, figures, etc., which differ from one sheet to another. And an apparatus for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method of recording individual information such as a serial number, characters, figures, and the like on a hologram, which differs from one sheet to another, a method of performing normal printing or stamping on a hologram surface or embossing A method of recording by processing and the like have been adopted.

However, the above-described method requires a printing or stamping step in addition to the hologram copying step, and thus has a problem in performing large-scale copying.

Further, since the information is not recorded as a hologram image, the forgery prevention effect is low and there is a problem in security.

[0005]

As described above, the conventional method for recording individual information has a problem not only in performing mass copying but also in terms of security.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and different pieces of individual information are continuously recorded on individual holograms in a hologram manufacturing process, so that a large number of copies can be made. It is an object of the present invention to provide a method and an apparatus for producing a hologram which can be performed easily and at a high speed, and which can enhance the effect of preventing forgery and improve security.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a Lippmann hologram is formed on a roll-shaped photopolymerized photopolymer, and a roll-shaped photopolymer is coated with a diffusing agent. In the method of producing a hologram, the film is brought into close contact with the photopolymerized photopolymer, heated, and the reproduction wavelength is shifted by changing the interval of interference fringes recorded in the photopolymerized photopolymer. Before the rolled film is brought into close contact with the photopolymerized photopolymer, the rolled film coated with the diffusing agent is patterned into a pattern where ultraviolet light is to be recorded.
At least a spatial modulation element that transmits / blocks light based on
The individual information such as a serial number, a character, and a figure is continuously recorded on a hologram by performing an ultraviolet exposure with an ultraviolet exposure device to generate patterns having different reproduction wavelengths.

In the invention corresponding to claim 2, a Lippmann hologram is formed on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated to form a photopolymer. By shifting the reproduction wavelength by changing the interval of interference fringes recorded in the polymerized photopolymer, an ultraviolet light source that generates ultraviolet light and an ultraviolet light emitted from the ultraviolet light source are parallelized in an apparatus that produces ultraviolet light. An optical element for converting light, an ultraviolet ray from the optical element is irradiated, a spatial modulation element for transmitting / shielding the ultraviolet ray based on a pattern to be recorded, and an ultraviolet ray transmitted through the spatial modulation element are brought into close contact with the photopolymerized photopolymer. UV exposure apparatus comprising an optical element for forming a slit-like image on a roll-shaped film coated with a diffusing agent. It is provided.

Here, in particular, a liquid crystal shutter is used as a spatial modulation element of the ultraviolet exposure apparatus, and a pattern to be recorded is cut in a direction perpendicular to a feed direction of a roll-shaped film coated with a diffusing agent to form a plurality of pieces of linear information. The information is projected onto a liquid crystal shutter in synchronization with the feed speed of the roll film.

On the other hand, in the invention corresponding to claim 4, a Lippmann hologram is prepared on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated to form In the method of producing a hologram by changing the interval of interference fringes recorded in the polymerized photopolymer and shifting the reproduction wavelength, a roll-shaped film coated with a diffusing agent is heated after being adhered to the photopolymerized photopolymer. before performing, in a roll film coated the diffusing agent, ultraviolet
Space change to transmit / shield based on the pattern you want to record
By performing ultraviolet exposure with an ultraviolet exposure device including at least a tone element to generate patterns having different reproduction wavelengths, individual information such as serial numbers, characters, and figures is continuously recorded on the hologram.

According to a fifth aspect of the present invention, a Lippmann hologram is formed on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated. By shifting the reproduction wavelength by changing the interval of interference fringes recorded in the polymerized photopolymer, an ultraviolet light source that generates ultraviolet light and an ultraviolet light emitted from the ultraviolet light source are parallelized in an apparatus that produces ultraviolet light. An optical element for converting light, an ultraviolet ray emitted from the optical element, a spatial modulation element for transmitting / shielding the ultraviolet ray based on a pattern to be recorded, and a photopolymerized photopolymer and a diffusing agent for the ultraviolet ray transmitted through the spatial modulation element. Optical element that forms a slit image on the film after the roll-shaped film coated with And a line exposure device.

Here, in particular, a liquid crystal shutter is used as a spatial modulation element of the ultraviolet exposure apparatus, and a pattern to be recorded is cut in a direction perpendicular to a film feeding direction to be decomposed into a plurality of linear information. The liquid crystal shutter is projected in synchronization with the film feed speed.

[0013]

Therefore, in the hologram manufacturing method and apparatus of the present invention, by recording different information continuously in the hologram manufacturing process, it is possible to easily and easily copy a large number of holograms in which different information is individually recorded. It can be performed at high speed.

Further, by combining the hologram image and the recording pattern, the reproduction wavelength is different from that of the surroundings, and the duplication becomes difficult. Therefore, the forgery prevention effect can be expected.

As described above, the present invention can be very effectively used for producing a hologram for use requiring security such as a membership card or a certificate.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) The method of manufacturing a hologram according to this embodiment is realized as follows.

That is, first, a copy exposure of a Lippmann hologram is performed on a roll-shaped photopolymerized photopolymer (HRF).

Examples of the photopolymerized photopolymer include:
For example, JP-A-2-3081 or JP-A-2-3081
No. 3082. The photopolymer described in JP-A-3-4292 is used as a duplication method.
The duplication method using a rotating drum described in "No."

Next, a film (CTF) coated with a diffusing agent described in, for example, JP-A-3-46687 is used to shift the reproduction wavelength of the photopolymer subjected to the duplicate exposure.

Here, the diffusing agent is a substance similar to the monomer used in the photopolymerized photopolymer, and is heated by being closely attached to the photopolymerized photopolymer on which the interference fringes are recorded. The diffusing agent acts to expand the spacing, causing a shift in the reproduction wavelength. At this time, in order to prevent the subsequent diffusion when the desired wavelength has been reached, by irradiating ultraviolet rays and polymerizing the monomer,
The shift of the reproduction wavelength can be fixed.

By the way, before the roll-shaped film coated with the diffusing agent is brought into close contact with the photopolymerized photopolymer, a certain amount of monomer is polymerized by irradiating it with a certain amount of ultraviolet light, which contributes to the shift of the reproduction wavelength. By controlling the amount of the monomer, it is possible to obtain a desired shift of the reproduction wavelength.

That is, by exposing a film coated with the above-mentioned diffusing agent with ultraviolet rays having an appropriate exposure amount and an appropriate shape, an arbitrary shape can be recorded at a reproduction wavelength different from that of its surroundings.

FIG. 1 shows an overall configuration example of an apparatus for bonding a photopolymerized polymer subjected to duplicate exposure and a film coated with a diffusing agent, which is a manufacturing apparatus for realizing the hologram manufacturing method according to the present embodiment. FIG.

That is, as shown in FIG. 1, the photopolymerized photopolymer 1 subjected to the duplicate exposure is peeled off from the HRF delivery roll 2 via the idler 4 by the splitter 6 while the HRF cover film take-up roll is peeled off. It winds up at 5 and sends it to the nip roll 7.

A roll film (CTF) 8 coated with a diffusing agent is peeled off from a CTF delivery roll 9 via an idler 11 by a splitter 13 while a CTF cover film winding roll 1 is peeled off.
It is wound up in 2 and sent to the nip roll 7.

Then, the photopolymerized photopolymer 1 from which the cover film 3 has been peeled off by the nip rolls 7,
The roll film 8 from which the cover film 10 has been peeled off is adhered and adhered.

Here, a positioning mark is recorded in advance in a portion of the photopolymerized photopolymer 1 where the image information is recorded, and the mark is reproduced by the positioning mark illumination lamp 14 and read by the positioning mark reading sensor 15. To do.

At this timing, an ultraviolet lamp 16 as an ultraviolet source, a lens 17 as an optical element, a liquid crystal shutter 18 as a spatial modulation element,
The roll film 8 on the splitter 13 is exposed to ultraviolet light by an ultraviolet exposure device including an imaging lens 19 serving as an imaging element.

That is, from the positioning mark reading sensor 15, the photopolymerized photopolymer 1 is
And the length up to the portion where the roll-shaped film 8 is bonded, from the portion where the ultraviolet light is irradiated on the splitter 13,
It is necessary that the length of the nip roll 7 is equal to the length up to the position where the photopolymerized photopolymer 1 and the roll film 8 are bonded to each other.

FIG. 2 is a schematic diagram showing an example of the configuration of the above-described ultraviolet exposure apparatus.

That is, in FIG. 2, first, ultraviolet rays emitted from the ultraviolet lamp 16 are
The liquid crystal shutter 18 is irradiated with parallel light, and the ultraviolet light transmitted by opening and closing the liquid crystal shutter 18 is transmitted to the roll film 8 on the splitter 13 by the imaging lens 19.
To form an image in the form of a slit.

In this case, the information to be projected on the liquid crystal shutter 18 is divided into a plurality of linear information by cutting a pattern to be recorded in a direction perpendicular to the feeding direction of the roll-shaped film 8. While synchronizing to speed,
This information is sequentially sent to the liquid crystal shutter 18.

Here, by making the linear information into a shape enlarged in the feed direction of the roll film 8, the enlargement ratio can be set as the amount of exposure to ultraviolet rays. That is, this is because the area of the liquid crystal shutter 18 in the feed direction of the roll film 8 becomes an opening of the imaging lens 19 and plays a role of a stop of the imaging lens 19.

As described above, it is possible to give different amounts of exposure to ultraviolet light depending on the enlargement ratio of the roll film 8 in the feeding direction, and the reproduction wavelength can be freely controlled.

As described above, the roll-shaped film 8 and the photopolymerized photopolymer 1 that have been exposed to ultraviolet light are wound around the take-up roll 20 at the same time as the bonding, and the amount of exposure to ultraviolet light is matched. A wavelength shift occurs, and there is a difference between the reproduction wavelength of the portion exposed to ultraviolet light and the reproduction wavelength of the unexposed portion. This makes it possible to continuously record individual information such as serial numbers, characters, and figures as a certain pattern.

As described above, in the method and apparatus for producing a hologram of this embodiment, a Lippmann hologram is produced on the roll-shaped photopolymerized photopolymer 1 and the rolled film 8 coated with a diffusing agent is applied to the photopolymerized photopolymer. 1 is heated in close contact with photopolymerized photopolymer 1
In the apparatus for producing a hologram, by changing the interval between interference fringes recorded in the hologram and shifting the reproduction wavelength, the ultraviolet lamp 16 for generating ultraviolet light and the ultraviolet light emitted from the ultraviolet lamp 16 are collimated. The lens 17 is irradiated with ultraviolet rays from the lens 17, and the liquid crystal shutter 18 transmits / shields the ultraviolet rays based on a pattern in which the ultraviolet rays are desired to be recorded. An ultraviolet light exposure device including an imaging lens 19 for forming an image in a slit shape on the roll film 8 coated with a diffusing agent,
Before the rolled film 8 coated with the diffusing agent is brought into close contact with the photopolymerized photopolymer 1 on which the Lippmann hologram is recorded, the rolled film 8 coated with the diffusing agent is exposed to ultraviolet light to generate patterns having different reproduction wavelengths. By doing so, individual information such as serial numbers, characters, figures, and the like is continuously recorded on the hologram.

Therefore, in order to record different individual information continuously during the hologram production process, a large number of Lippmann holograms in which different individual information are individually recorded can be copied in large quantities.
It is possible to carry out continuously, easily and at high speed.

Further, since the pattern of the hologram image and the pattern of the different reproduction wavelength are combined, the reproduction wavelength is different from that of the surroundings, and it becomes difficult to copy, so that the anti-counterfeiting effect can be expected.

As described above, the present invention can be very effectively used for producing a hologram for use requiring security such as a membership card or a certificate.

(Second Embodiment) The method of manufacturing a hologram according to the present embodiment is realized as follows.

That is, first, a copy exposure of a Lippmann hologram is performed on a roll-shaped photopolymerized photopolymer (HRF).

Examples of the photopolymerized photopolymer include:
For example, JP-A-2-3081 or JP-A-2-3081
No. 3082. The photopolymer described in JP-A-3-4292 is used as a duplication method.
The duplication method using a rotating drum described in "No."

Next, a film (CTF) coated with a diffusing agent described in, for example, JP-A-3-46687 is used to shift the reproduction wavelength of the photopolymer subjected to the duplicate exposure.

Here, the diffusing agent is a substance similar to the monomer used for the photopolymerized photopolymer, and is heated by being closely attached to the photopolymerized photopolymer on which the interference fringes are recorded. The diffusing agent acts to expand the spacing, causing a shift in the reproduction wavelength. At this time, in order to prevent the subsequent diffusion when the desired wavelength has been reached, by irradiating ultraviolet rays and polymerizing the monomer,
The shift of the reproduction wavelength can be fixed.

After the roll-shaped film coated with the diffusing agent is brought into close contact with the photopolymerized photopolymer and before heating, the film is irradiated with a certain amount of ultraviolet light, whereby
By polymerizing a certain amount of monomers and controlling the amount of monomers involved in the shift of the reproduction wavelength, it is possible to obtain a desired shift of the reproduction wavelength.

That is, an arbitrary shape is formed by exposing the film after the roll-shaped film coated with the above-mentioned diffusing agent and the photopolymerized photopolymer to each other with ultraviolet rays having an appropriate amount and an appropriate exposure amount. Recording can be performed at a reproduction wavelength different from the surroundings.

FIG. 3 is an example of the overall configuration of an apparatus for bonding a photopolymerized photopolymer subjected to duplicate exposure and a film coated with a diffusing agent, which is a manufacturing apparatus for realizing the hologram manufacturing method according to the present embodiment. FIG.

That is, as shown in FIG. 3, the photopolymerized photopolymer 1 subjected to the duplication exposure is peeled off from the HRF delivery roll 2 by the splitter 6 via the idler 4 and the HRF cover film take-up roll. It winds up at 5 and sends it to the nip roll 7.

Further, the roll film (CTF) 8 coated with the diffusing agent is peeled off the cover film 10 from the CTF delivery roll 9 via the idler 11 by the splitter 13 while the CTF cover film winding roll 1
It is wound up in 2 and sent to the nip roll 7.

Then, the photopolymerized photopolymer 1 from which the cover film 3 is peeled off by the nip rolls 7 and
The roll film 8 from which the cover film 10 has been peeled off is adhered and adhered.

Here, a positioning mark is recorded in advance on a portion of the photopolymerized photopolymer 1 where information of the image is recorded, and the mark is reproduced by the positioning mark illumination lamp 14 and read by the positioning mark reading sensor 15. To do.

At this timing, an ultraviolet lamp 21 as an ultraviolet source, a lens 22 as an optical element, a liquid crystal shutter 23 as a spatial modulation element,
An ultraviolet exposure apparatus including an imaging lens 24 serving as an imaging element is used to expose the photopolymerized photopolymer 1 and the roll film 8 to the film 25 (the roll film 8) after the nip roll 7 has brought the photopolymerized photopolymer 1 into close contact with the roll film 8. Perform

That is, from the positioning mark reading sensor 15, the photopolymerized photopolymer 1 is
25 after the film and the roll film 8 are brought into close contact with each other
It is necessary to project information on the liquid crystal shutter 23 in synchronization with the distance to the part to be irradiated with the ultraviolet light on the (roll film 8) and the timing determined by the feed speed of the film 25.

FIG. 4 is a schematic diagram showing an example of the configuration of the above-mentioned ultraviolet exposure apparatus.

That is, in FIG. 4, first, the ultraviolet light emitted from the ultraviolet lamp 21 is
The liquid crystal shutter 23 is irradiated with parallel light, and the ultraviolet light transmitted by opening and closing the liquid crystal shutter 23 is applied to the film 25 (roll) by bringing the photopolymerized photopolymer 1 and the roll film 8 into close contact with each other by the imaging lens 24. The film 8) is imaged in a slit shape.

In this case, the information to be projected on the liquid crystal shutter 23 is divided into a plurality of linear information by cutting a pattern to be recorded in a direction perpendicular to the feed direction of the film 25, and is synchronized with the feed speed of the film 25. While sending this information to the liquid crystal shutter 23 in sequence.

Here, the linear information is transferred to the film 25.
In this case, it is possible to set the enlargement ratio to the amount of exposure to ultraviolet light. That is, this is because the area of the liquid crystal shutter 23 in the feed direction of the film 25 becomes an opening of the imaging lens 24 and plays a role of a stop of the imaging lens 24.

As described above, it is possible to give different amounts of UV exposure depending on the magnification in the feed direction of the film 25, and the reproduction wavelength can be freely controlled.

As described above, at the same time as the bonding, the roll film 8 and the photopolymerized photopolymer 1 that have been exposed to ultraviolet light are wound around the take-up roll 20 and heated to match the amount of ultraviolet light exposure. A wavelength shift occurs, and there is a difference between the reproduction wavelength of the portion exposed to ultraviolet light and the reproduction wavelength of the unexposed portion. This makes it possible to continuously record individual information such as serial numbers, characters, and figures as a certain pattern.

As described above, in the method and apparatus for producing a hologram of this embodiment, a Lippmann hologram is produced on the roll-shaped photopolymerized photopolymer 1 and the rolled film 8 coated with a diffusing agent is applied to the photopolymerized photopolymer. 1 is heated in close contact with photopolymerized photopolymer 1
In the apparatus for producing a hologram by changing the interval of the interference fringes recorded in the hologram, the ultraviolet lamp 21 for generating ultraviolet light and the ultraviolet light emitted from the ultraviolet lamp 21 are made into parallel light in an apparatus for producing a hologram. The lens 22 is irradiated with ultraviolet rays from the lens 22, and the liquid crystal shutter 23 transmits / shields the ultraviolet rays based on a pattern to be recorded. The ultraviolet rays transmitted through the liquid crystal shutter 23 are coated with the photopolymerized photopolymer 1 and the diffusing agent. And an image forming lens 24 for forming an image in a slit shape on the film 25 (roll film 8) after the roll film 8 is brought into close contact with the roll film 8. The roll film 8 coated with a diffusing agent is provided. After heating the photopolymer 1 on which the Lippmann hologram is recorded, the heating is performed before heating. Agent subjected to ultraviolet exposure roll film 8 coated, by forming a different pattern of reproduction wavelength, in which sequential numbers, letters, individual information such as characters and graphics and the like continuously recorded on the hologram.

Therefore, in order to continuously record different individual information in the hologram production process, a large number of Lippmann holograms in which different individual information are individually recorded can be copied in large quantities.
It is possible to carry out continuously, easily and at high speed.

Further, since the pattern of the hologram image and the pattern of the different reproduction wavelength are combined, the reproduction wavelength is different from that of the surroundings, and duplication becomes difficult, so that a forgery prevention effect can be expected.

As described above, the present invention can be extremely effectively used for producing a hologram for use requiring security such as a membership card or a certificate.

It should be noted that the present invention is not limited to the above-described embodiment, but can be similarly implemented in the following manner.

(A) In the first or second embodiment, the lens 17 or the lens 22 is used as an optical element.
Has been described, but the present invention is not limited to this, and other optical elements may be used.

(B) In the first or second embodiment, the case where the liquid crystal shutter 18 or the liquid crystal shutter 23 is used as the spatial modulation element has been described. However, the present invention is not limited to this. It may be used.

[0068]

As described above, according to the present invention, the expansion is achieved.
Rolled film coated with powder is photopolymerized photopolymer
Roll before applying it or applying a diffusing agent
After the film is adhered to the photopolymerized photopolymer,
Before applying heat, a roll-shaped film coated with the diffusing agent
To transmit / block the ultraviolet rays based on the pattern to be recorded.
Ultraviolet light exposure apparatus comprising at least a spatial light modulating element
In performs UV exposure, by forming a different pattern of reproduction wavelength, serial number, character, since the individual information such as characters and graphics to be continuously recorded on the hologram, with respect to the individual hologram, different individual information Method and apparatus for producing a hologram capable of performing recording continuously in a hologram production step, easily performing high-volume copying at high speed, and improving security by improving anti-counterfeiting effect Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first embodiment of a hologram manufacturing apparatus (bonding apparatus) according to the present invention.

FIG. 2 is a schematic diagram illustrating a configuration example of an ultraviolet exposure apparatus of the hologram manufacturing apparatus according to the embodiment.

FIG. 3 is a schematic view showing a second embodiment of a hologram manufacturing apparatus (bonding apparatus) according to the present invention.

FIG. 4 is a schematic diagram illustrating a configuration example of an ultraviolet exposure apparatus of the hologram manufacturing apparatus according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Photopolymerized photopolymer, 2 ... HRF sending-out roll, 3 ... Cover film, 4 ... Idler, 5 ... HRF cover film take-up roll, 6 ... Splitter, 7 ...
Nip roll, 8 ... Rolled film (CTF), 9 ...
CTF delivery roll, 10 ... cover film, 11 ...
Idler, 12: CTF cover film take-up roll, 13: Splitter, 14: Positioning mark illumination lamp, 15: Positioning mark reading sensor, 16 ...
UV lamp, 17 ... lens, 18 ... liquid crystal shutter,
19: imaging lens, 21: ultraviolet lamp, 22: lens, 23: liquid crystal shutter, 24: imaging lens, 25:
the film.

Claims (6)

(57) [Claims] 1. A Lippmann hologram is formed on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and is heated to record the photopolymerized photopolymer. In the method of producing a hologram by changing the interval of interference fringes that are present and shifting the reproduction wavelength, before the roll film coated with the diffusing agent is brought into close contact with the photopolymerized photopolymer, the diffusing agent is applied. the roll-shaped film was, based on the pattern to be recorded with ultraviolet
At least a spatial modulation element that transmits / blocks light.
By performing ultraviolet exposure with an ultraviolet exposure device to generate patterns with different reproduction wavelengths, serial numbers, letters,
A method for producing a hologram, wherein individual information such as a figure is continuously recorded on a hologram. 2. A Lippmann hologram is produced on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated to record the film on the photopolymerized photopolymer. In a device for producing a hologram by shifting the reproduction wavelength by changing the interval between interference fringes, an ultraviolet light source for generating ultraviolet light, and an optical element for converting ultraviolet light emitted from the ultraviolet light source into parallel light A spatial modulation element that is irradiated with ultraviolet rays from the optical element and transmits / blocks the ultraviolet rays based on a pattern in which the ultraviolet rays are to be recorded; and a diffusion before the ultraviolet rays transmitted through the spatial modulation element are brought into close contact with the photopolymerized photopolymer. Image forming element for forming a slit-like image on a roll-shaped film coated with an agent, and an ultraviolet exposure device consisting of The apparatus for producing a hologram, characterized in that the. 3. A liquid crystal shutter is used as a spatial modulation element of the ultraviolet exposure apparatus, and a pattern to be recorded is cut in a direction perpendicular to a feed direction of a roll-shaped film coated with the diffusing agent to form a plurality of linear information. 3. The hologram producing apparatus according to claim 2, wherein the hologram is disassembled and the information is projected onto a liquid crystal shutter in synchronization with a feed speed of the roll film. 4. A Lippmann hologram is prepared on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated to record the film on the photopolymerized photopolymer. By shifting the reproduction wavelength by changing the interval of the interference fringes that are present, in the method of producing a hologram, before heating after applying the roll-shaped film coated with the diffusing agent to the photopolymerized photopolymer, The ultraviolet light is recorded on the roll-shaped film coated with the diffusing agent.
Is a spatial modulation element that transmits / blocks light based on the desired pattern
A hologram characterized in that individual information such as a serial number, a character, and a figure is continuously recorded on a hologram by performing ultraviolet exposure with at least an ultraviolet exposure device to generate patterns having different reproduction wavelengths. Method of manufacturing. 5. A Lippmann hologram is formed on a roll-shaped photopolymerized photopolymer, and a roll-shaped film coated with a diffusing agent is brought into close contact with the photopolymerized photopolymer and heated to record the hologram on the photopolymerized photopolymer. In a device for producing a hologram by shifting the reproduction wavelength by changing the interval between interference fringes, an ultraviolet light source for generating ultraviolet light, and an optical element for converting ultraviolet light emitted from the ultraviolet light source into parallel light An ultraviolet ray from the optical element is irradiated, and a spatial modulation element that transmits / shields the ultraviolet ray based on a pattern in which the ultraviolet ray is to be recorded; and applies the ultraviolet ray transmitted through the spatial modulation element to the photopolymerized photopolymer and the diffusing agent. An image forming element for forming an image in a slit shape on the film after the rolled film in close contact with the film, The apparatus for producing a hologram, characterized in that it comprises a line exposure device. 6. A liquid crystal shutter is used as a spatial modulation element of the ultraviolet exposure apparatus, and a pattern to be recorded is cut in a direction perpendicular to a direction in which the film is fed to decompose the information into a plurality of linear information. 3. The hologram producing apparatus according to claim 2, wherein the projection is performed on a liquid crystal shutter in synchronization with a film feeding speed.