JP4656682B2 - Hologram replication method and hologram replication system - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a hologram duplicating method and a hologram duplicating system, and more particularly to a method and system for optically duplicating a hologram on an original plate by continuously attaching a photosensitive material film to the surface of the hologram original plate.
[0002]
[Prior art]
Conventionally, the hologram master and the photosensitive material are brought into close contact with each other, irradiated with laser light, and the diffracted light from the original and the incident light are caused to interfere in the contacted photosensitive material to record the hologram image of the original in the photosensitive material. Thus, the hologram master is duplicated. In this case, in order to prevent image disturbance due to the back surface reflection component of the photosensitive material, an optical contact liquid having substantially the same refractive index is interposed between the original and the photosensitive material, thereby improving the adhesion and preventing back surface reflection. The hologram image is duplicated.
[0003]
At that time, dust particles or bubbles may be included between the original and the photosensitive material, and a defect may occur in the reproduction of the hologram. In view of this, the present applicant, in JP-A-8-52749, peels off the support film on the original plate side of the support film that supports the photosensitive material from both sides, and exposes the photosensitive material film such as a photopolymer to remove the roller. Proposed that the photosensitive material film is directly adhered to the original plate while being wrung from above.
[0004]
[Problems to be solved by the invention]
In the method of the above-mentioned JP-A-8-52749, the hologram duplication defect is not generated by embedding dust particles or bubbles between the original plate and the photosensitive material in the hologram duplication as in the purpose. Since the other support film that supports the film from both sides is interposed in the optical path during hologram replication, there is a possibility that the optical characteristics of the replicated product will be deteriorated, such as disturbance of interference fringes based on the birefringence of the support film. is there. In particular, when PET (polyethylene terephthalate) is used as the support film, this problem is serious because PET has birefringence.
[0005]
The present invention has been made in view of such problems of the prior art, and its purpose is to apply a photosensitive material film to the hologram master surface continuously to optically replicate the hologram of the master, It is an object of the present invention to provide a method and a system in which deterioration of a duplicate product based on optical characteristics such as birefringence of a photosensitive material support film is prevented.
[0006]
[Means for Solving the Problems]
The hologram duplicating method of the present invention that achieves the above-mentioned object is the method of bringing a photosensitive material into close contact with a hologram master, irradiating a laser beam through the photosensitive material, and diffracting light and incident light from the hologram master in the photosensitive material. In the method of duplicating a hologram by causing interference, a film in which a support film is laminated on both sides of a photosensitive material is used as a duplicating film, and the supporting film on the hologram master side of the duplicating film is peeled off to remove the photosensitive material from the hologram master. After being attached to the substrate, the support film on the opposite side is peeled off and irradiated with a laser beam for duplication.
[0007]
In this case, it is desirable to peel off the exposed photosensitive material from the hologram master after irradiating the duplicating laser beam and then attaching the opposite support film on the exposed photosensitive material again.
[0008]
Further, it is desirable to attach a protective film on the exposed photosensitive material after peeling from the hologram master.
[0009]
Further, it is desirable to attach a protective film to the surface of the photosensitive material that has been exposed after peeling from the hologram master.
[0010]
In addition, it is desirable to perform irradiation with laser light for replication in a nitrogen atmosphere.
[0011]
In the hologram duplication system of the present invention, the lower support film peeling portion for peeling the lower support film from the duplication film in which the support films are laminated on both sides of the photosensitive material, and the lower support film is peeled from the hologram original plate. The film for duplication is affixed one after another while squeezing the film for duplication from above with a roller, and the upper support film is peeled off from the duplication film stuck on the hologram master, and the upper support film is peeled off and pasted again. A hologram duplication exposure unit for optically duplicating the hologram master on the photosensitive material affixed to the hologram master, and sequentially peeling from one end while pressing the exposed duplication film affixed to the hologram master with a roller It is characterized by having an exposed film peeling part for duplication. .
[0012]
In this case, it is desirable that the roller in the duplication film affixing unit and the roller in the exposed duplication film peeling unit are combined.
[0013]
In the present invention, a duplicate film having a support film laminated on both sides of the photosensitive material is used, and after peeling the support film on the hologram master side of the duplicate film and attaching the photosensitive material to the hologram master Since the supporting film on the opposite side is peeled off and irradiated with a laser beam for duplication, there is no generation of hologram duplication defects due to inclusion of dust particles or bubbles between the hologram master and the photosensitive material in hologram duplication In addition, since the support film does not intervene in the optical path during hologram replication, the optical properties of the replicated product such as disturbance of interference fringes due to the birefringence of the support film do not occur, and a good replication hologram can be obtained. .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the hologram replication method and the hologram replication system of the present invention will be described below.
A Lippmann hologram (reflection hologram) master is photographed using an optical system as shown in FIG. That is, using Ar laser 21, the light oscillated therefrom is divided into two light beams by half mirror 22, and one light is condensed into pinhole 25 through mirror 23 and lens 24 and emitted from pinhole 25. The divergent light is incident obliquely from one side of the photosensitive material 26. The other divided light is condensed in the pinhole 30 through the mirrors 27 and 28 and the lens 29, and the divergent light emitted from the pinhole 30 is incident from the other side of the photosensitive material 26, and both divergences are emitted. The light beam interferes in the photosensitive material 26 and is recorded therein. As the photosensitive material 26, Omnidex-706 holographic recording film manufactured by DuPont, USA is used. The exposure amount is 35 mJ / cm ² with light having a wavelength of 514 nm from the Ar laser 21. After the exposure, the photosensitive material 26 on which the hologram is recorded is uniformly exposed to 100 mJ / cm ^{2 with} an ultrahigh pressure mercury lamp, and is sealed between glass plates with an optical adhesive (NOA-61 manufactured by Norland, USA). And
[0015]
Using such a hologram original plate 31, hologram replication is performed using a mechanism as shown in FIGS. The major feature in this case is the deterioration of the duplicated product based on the optical properties such as birefringence of the support film by peeling the support film on both sides of the photosensitive material and replicating it without passing through the support film. This is a point to prevent.
[0016]
The photosensitive material film for duplication 1 for performing hologram duplication has a layer structure as shown in FIG. 5 and has, for example, Omnidex-706 holographic recording having a three-layer structure of support film 3 / photosensitive material 2 / support film 4. Use film.
[0017]
Now, hologram replication will be described with reference to FIGS.
A combination of the movement of the affixing / lower support film peeling head 32 and the upper support film peeling / applying head 33 and the raising / lowering of the hologram original plate 31 is used to form the support films 3 and 4 of the photosensitive material film 1 for duplication. The operation of peeling and laminating only the photosensitive material 2 onto the hologram master 31, replicating exposure, attaching the support film 4 again, and peeling from the hologram master 31 will be described in detail. The affixing / lower support film peeling head 32 is provided with a peeling roller 35 and an affixing / peeling roller 36, and the photosensitive material film 1 for duplication is exposed to the support film 3 and photosensitive via the peeling roller 35. The material 2 / the support film 4 is separated, and the photosensitive material 2 / the support film 4 is guided to the peeling / sticking common roller 38 of the upper support film peeling / sticking head 33 through the sticking / peeling common roller 36. . The photosensitive material 2 / support film 4 between the affixing / peeling shared roller 36 and the exfoliating / affixing shared roller 38 is laminated on the original plate 31, and then the upper support film peeling / affixing head 33 moves to move the photosensitive material. Material 2 / Support film 4 of support film 4 is peeled off, both support films 3 and 4 are peeled and exposed to photosensitive material 2 attached on original plate 31, and then the upper support film is peeled off and pasted. The support film 4 is again affixed onto the photosensitive material 2 by the movement of the attaching head 33, and the exposed photosensitive material 2 ′ / support film 4 is peeled off from the original 31. The attaching / lower support film peeling head 32 and the upper support film peeling / attaching head 33 are each provided with a head left / right moving mechanism (not shown) that moves to the left and right in the drawing. 31 is mounted on an original plate vertical movement mechanism (not shown).
[0018]
First, as shown in FIG. 1 (1), in order to laminate the photosensitive material 2 / support film 4 to the original plate 31, the original plate 31 is positioned at the lowered position, and the original plate 31 is pasted on the upper right side where the original plate 31 is removed. The lower support film peeling head 32 and the upper support film peeling / sticking head 33 are moved. Reference numeral 34 denotes a protective film laminating portion for laminating a protective film 5 with an adhesive instead of the support film 4 on the exposed photosensitive material 2 ′, and a cover sheet (50 μm thick PET) supplied from an unwinding roller 39 The protective film 5 is peeled off by the peeling roller 41, and the peeled cover sheet is taken up by the take-up roller 40, while the protective film 5 is laminated on the exposed photosensitive material 2 ′ by the laminating roller 42. The The side of the laminating roller 42 that contacts the photosensitive material is preferably subjected to a mold release process.
[0019]
Next, as shown in FIG. 1 (2), with the film 1 and the photosensitive material 2 / support film 4 fixed, the pasting / peeling shared roller 36 is pasted until it reaches the position where it passes the right edge of the original plate 31. The attachment / lower support film peeling head 32 is moved to the left side.
[0020]
Then, as shown in FIG. 1 (3), with the pasting / peeling common roller 36 passing through the right edge of the master 31 and being positioned on the master 31, the master 31 is raised, and the pasting / peeling common roller Press against 36. Then, the pasting / lower support film peeling head 32 is continuously moved to the left side while the pasting / peeling common roller 36 is pressed, and lamination of the photosensitive material 2 / support film 4 to the original 31 is started. At this time, the photosensitive material 2 is laminated on the original plate 31.
[0021]
As shown in FIG. 1 (4), the pasting / lower support film peeling head 32 is moved to the left until the pasting / peeling shared roller 36 reaches the left edge of the original plate 31, and the photosensitive material 2 / support Lamination of the film 4 on the original plate 31 is completed.
[0022]
After that, as shown in FIG. 2 (5), the original / 31 is lowered while the pasting / peeling shared roller 36 is located immediately before the left edge of the original 31, and the pasting / peeling shared roller 36 is separated from the original 31. .
[0023]
After that, as shown in FIG. 2 (6), the sticking / peeling common roller 36 is further moved to the left side so that the sticking / lower support film peeling head 32 comes to the upper left of the original plate 31. At the position, the movement of the affixing / lower support film peeling head 32 is stopped. In this state, the photosensitive material 2 / support film 4 is laminated not only on the entire surface of the original 31 but only in the central region avoiding both ends, and the photosensitive material 2 / support film 4 with both ends not adhered is the original. It is lifted from 31 and held so as to form a minute angle α with respect to the surface. This angle α is set to about 2 to 10 °.
[0024]
Next, as shown in FIG. 2 (7), the upper support film winding / rewinding roller 37 supports the upper side with the affixing / lower support film peeling head 32 stopped at the position of FIG. 2 (6). The upper support film peeling / sticking head 33 is moved to the left side while winding the body film 4, and the support film 4 on the upper side of the photosensitive material 2 / support film 4 laminated on the original plate 31 is peeled and pasted. The photosensitive material 2 is affixed to the original plate 31 through the common roller 38 and is peeled off while maintaining the state. In order to enable such peeling, the duplicating photosensitive material film 1 is made so that the adhesive force between the support film 4 and the photosensitive material 2 is smaller than the adhesive force with respect to the original 31 of the photosensitive material 2 in the layer configuration of FIG. It is necessary to set the characteristics.
[0025]
Thereafter, as shown in FIG. 2 (8), the upper support film peeling / sticking head 33 is further moved to the left side so that the upper support film peeling / sticking head 33 comes to the upper left of the original plate 31. And stop at that position.
[0026]
Next, as shown in FIG. 2 (9), the portion of the photosensitive material 2 corresponding to the area around the original 31 is subjected to trimming exposure, and further, the original 31 is reflected in order to perform hologram replication of the original 31. Since it is a hologram, replica exposure of the original 31 is performed by irradiating a laser beam for hologram replication from the photosensitive material 2 side. Note that if there is oxygen in the atmosphere around the photosensitive material 2 at the time of duplication, the photopolymerization (polymerization) reaction of the photopolymer is inhibited. Therefore, at least at the time of trimming and duplication exposure in FIG. The atmosphere needs to be an atmosphere of nitrogen (N ₂ ).
[0027]
Thereafter, as shown in FIG. 3 (10), the upper support film peeling / sticking head while the upper support film 4 is rewound from the upper support film winding / rewinding roller 37, contrary to FIG. 2 (7). 33 is moved to the right side, and the support film 4 once peeled is exposed to the upper side of the exposed photosensitive material 2 ′ laminated on the original plate 31, and is pasted through the common roller 38.
[0028]
Thereafter, as shown in FIG. 3 (11), the upper support film peeling / applying head 33 is further moved to the right side and stopped at the same position as in the state of FIG. 2 (6).
[0029]
Then, as shown in FIG. 3 (12), the affixing / lower support film peeling head 32 is moved to the right side, and the affixing / peeling shared roller 36 passes over the left edge of the original 31 and is on the original 31. Bring it to a position. At this time, the support film 3 is fed out while the film 1 and the photosensitive material 2 / support film 4 are fixed.
[0030]
Next, as shown in FIG. 3 (13), the original plate 31 is raised in this state and is pressed against the shared application / peeling roller 36. Then, the affixing / lower support film peeling head 32 is continuously moved to the right side in a state where the affixing / peeling common roller 36 is pressed, and peeling of the exposed photosensitive material 2 ′ / support film 4 from the original 31 is performed. Start.
[0031]
Next, as shown in FIG. 4 (14), the pasting / lower support film peeling head 32 is moved to the right until the pasting / peeling shared roller 36 reaches the right edge of the original plate 31. Release of the material 2 ′ / support film 4 from the original 31 is completed.
[0032]
Next, as shown in FIG. 4 (15), the master 31 is lowered while the pasting / peeling shared roller 36 is in a position immediately before the right edge of the master 31, and the pasting / peeling shared roller 36 is separated from the master 31. .
[0033]
Finally, as shown in FIG. 4 (16), the affixing / lower support film peeling head 32 is further moved to the right side, and the affixing / lower support film peeling head 32 is removed from the original plate 31. To come to and stop at that position. In this state, the unexposed film 1 (FIG. 5) is sent out by one frame and a distance between frames, and the protective film 5 is laminated by the protective film laminating portion 34 on the exposed photosensitive material 2 ′. Film 1 ′ (FIG. 6) is wound up by the same dimensions. During this time, the upper support film 4 is wound on the upper support film 4 by the upper support film winding / rewinding roller 37 of the upper support film peeling / sticking head 33, so that the upper support film is pasted again on the exposed photosensitive material 2 ′. 4 is peeled again, and the protective film 5 supplied from the unwinding roller 39 through the peeling roller 41 in the protective film laminating section 34 is bonded to the exposed photosensitive material 2 ′ by the laminating roller 42.
[0034]
Then, returning to the step of FIG. 1A, the next replication is performed.
As shown in FIG. 6, the exposed film 1 ′ duplicated in this way has a protective film 5 bonded on the exposed photosensitive material 2 ′, but is opposite to the protective film 5. When another protective film is bonded to the side, another protective film laminate portion may be provided on the lower side downstream of the protective film laminate portion 34.
[0035]
Using the hologram replication system configured as described above, there is no occurrence of replication defects due to foreign matters such as dust and bubbles, there is no peeling unevenness, and replication products such as disturbance of interference fringes based on the birefringence of the support film. It is possible to continuously and efficiently produce a good duplicate hologram without any deterioration of the optical characteristics.
[0036]
As described above, the hologram replication method and the hologram replication system of the present invention have been described based on the embodiments. However, the present invention is not limited to these embodiments, and various modifications are possible.
[0037]
【The invention's effect】
As is apparent from the above description, according to the hologram duplicating method and the hologram duplicating system of the present invention, the duplication film having a support film laminated on both sides of the photosensitive material is used, and the duplication film hologram master side After the support film was peeled off and the photosensitive material was affixed to the hologram master, the support film on the opposite side was peeled off and irradiated with a laser beam for duplication. In addition to the generation of hologram duplication defects due to the inclusion of dust particles or bubbles in the optical disc, there is no support film in the optical path at the time of hologram duplication, so duplication such as disturbance of interference fringes based on the birefringence of the support film The optical properties of the product do not deteriorate, and a good duplicate hologram can be obtained.
[Brief description of the drawings]
FIG. 1 is a partial process diagram for explaining a hologram duplication process in one embodiment of the present invention.
FIG. 2 is a process diagram of another part subsequent to the process of FIG. 1;
FIG. 3 is a process diagram of another portion subsequent to the process in FIG. 2;
FIG. 4 is a remaining process diagram subsequent to the process of FIG. 3;
FIG. 5 is a diagram showing a layer structure of a photosensitive material film for duplication.
FIG. 6 is a diagram showing a layer structure of an exposed film.
FIG. 7 is a diagram showing a configuration of a hologram master photographing optical system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Photosensitive material film 1 'for duplication Exposed film 2 ... Photosensitive material 2' ... Exposed photosensitive material 3, 4 ... Support film 5 ... Protective film 21 ... Ar laser 22 ... Half mirror 23, 27, 28 ... Mirror 24, 29 ... lens 25, 30 ... pinhole 26 ... photosensitive material 31 ... hologram original plate 32 ... pasting / lower support film peeling head 33 ... upper support film peeling / pasting head 34 ... protective film laminating section 35 ... Peeling roller 36 ... Plasting / peeling common roller 37 ... Upper support film take-up / rewinding roller 38 ... Peeling / paste common roller 39 ... Winding roller 40 ... Take-up roller 41 ... Peeling roller 42 ... Lamination roller

Claims (7)

In a method of replicating a hologram by making a photosensitive material in close contact with the hologram master, irradiating laser light through the photosensitive material, and causing the diffracted light and incident light from the hologram master to interfere in the photosensitive material, a replication film Using a film with support films laminated on both sides of the photosensitive material, peel off the support film on the hologram master side of the duplicate film, attach the photosensitive material to the hologram master, and then peel the support film on the opposite side Then , a hologram duplication method characterized by irradiating a duplication laser beam onto a photosensitive material on which no support film is laminated on both sides .   2. The exposed photosensitive material is peeled off from the hologram master after the laser beam for duplication is irradiated and the support film on the opposite side is again attached on the exposed photosensitive material. The hologram duplication method as described.   3. The hologram duplicating method according to claim 1, wherein a protective film is stuck on the exposed photosensitive material after peeling from the hologram master.   4. The hologram duplicating method according to claim 1, wherein a protective film is attached to a surface of the photosensitive material that has been exposed after being peeled from the hologram master.   5. The hologram duplication method according to claim 1, wherein the duplication laser beam is irradiated in a nitrogen atmosphere. Lower support film peeling part that peels the lower support film from the duplication film in which the support film is laminated on both sides of the photosensitive material, and the duplication film from which the lower support film is peeled off the hologram master Duplicate film affixing part to be applied in sequence while squeezing, upper support film is peeled off from duplication film affixed to hologram master, and upper support film is peeled off and reapplied again, and affixed to hologram master A hologram duplication exposure unit for optically duplicating the hologram master on the photosensitive material produced, an exposed duplication film affixed to the hologram master, wherein the upper support film is the upper support film peeling / re-pasting unit in sequentially peeling the duplication film pasted again from one end while holding a roller Hologram replicating system comprising the exposed duplicating film peeling unit for.   7. The hologram duplication system according to claim 6, wherein a roller in the duplication film affixing unit and a roller in the exposed duplication film peeling unit are combined.

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