JP3299035B2 - Hologram duplication method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram duplication method, and more particularly to a hologram duplication method in which a photosensitive material film is continuously adhered to an original plate and peeled off after duplication.

[0002]

2. Description of the Related Art Conventionally, a hologram master and a photosensitive material are brought into intimate contact with each other, and a laser beam is irradiated to cause the diffracted light from the master and the incident light to interfere with each other in the adhered photosensitive material, thereby exposing the hologram image of the master to a photosensitive material. By recording in a material, a hologram master is duplicated. In this case, in order to prevent the image from being disturbed due to the back reflection component of the photosensitive material,
An optical contact liquid having substantially the same refractive index is interposed between the master and the photosensitive material to improve adhesion and prevent backside reflection, thereby reproducing a hologram image.

[0003]

By the way, the optical contact liquid interposed between the hologram master and the photosensitive material is a liquid that has been spilled, and does not have a uniform thickness due to its fluidity, unevenness in thickness, vibration, etc. In particular, when the amount of the contact liquid is large, there is a problem that a good hologram cannot be copied due to the flow. Even if the hologram is copied in a clean room, dust of 10 μm or less may be mixed.
There is a problem that the flow of the optical contact liquid around the dust and the lifting of the film due to the dust hinder reproduction.

In view of the above, as described in Japanese Patent Application No. 4-327918, a duplicating method and apparatus using a cushion layer that suppresses generation of duplication defects by embedding dusts have been devised, but there are still problems in terms of durability and the like. There was a point.

The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a method in which a photosensitive material film is continuously and reliably brought into close contact with the surface of a hologram master, and is peeled off after copying. It is to be.

[0006]

As shown in FIG. 1 (a), the hologram is copied by bringing the photosensitive material film 1 into close contact with the hologram master 5 with an optical contact liquid 6 having a refractive index substantially equal to that of the original film. Laser light 7 is incident from the photosensitive material film 1 side (or the hologram master 5 side as described later), and this light 7 and the diffracted light 8 from the master 5 are caused to interfere in the adhered photosensitive material film 1. The photosensitive material film 1 made of a photopolymer or the like for hologram recording usually has a three-layer structure of a support film 3 / a photosensitive material 2 / a support film 4, and when adhered, a minute layer is formed. When the dust 9 is mixed, a copy defect occurs due to the flow of the optical contact liquid 6 around the dust 9 and the lifting of the film 1 due to the dust 9.

[0007] Then, the support film 3 on the original plate 5 is peeled off to expose the photosensitive material layer 2 which is a viscoelastic body.
As shown in (b), by laminating the photosensitive material layer 2 directly on the original plate 5, it is possible to embed dust particles 9 and the like in the layer 2 to suppress the occurrence of replication defects.

At this time, the support films 3, 4
It is desirable that dust particles and the like on the upper surface be removed with an adhesive roller or the like. In addition, in order to suppress adsorption of dust particles and the like due to static electricity generated when the support film 3 is peeled off, a static electricity removing device (such as ion wind spraying, corona discharge, etc.) ) Is desirable.

Incidentally, when the photosensitive material film 1 from which one of the support films 3 has been peeled off is directly laminated on an original glass (usually a glass support) 5, the intrusion of bubbles or the like becomes a replication defect as it is. Therefore, based on the present invention, the photosensitive material films 1 are sequentially brought into close contact with each other while being squeezed from above with a roller. The diameter of the roller to be pressed and the path of the film are smaller than those of the system shown in FIG.
As shown in (b), the diameter of the roller 10 is smaller,
A system in which the winding angle θ of the film 1 is large is more desirable.
That is, the diameter of the roller 10 is desirably a small diameter of 100 mmφ or less, and preferably about 50 mmφ. At this time, since the roller 10 may bend, the pressure may be further applied by a large-diameter roller. The winding angle θ of the film 1 is also 90 °.
The above is desirable, and the pressing pressure of the roller 10 is 0.1 kgf.
/ Cm ² or more, the tension of the film 1 is not less than 0.1 kgf / cm, and the pressing pressure of the roller 10 and the tension of the film 1 are desirably large.

As described above, in order to prevent air bubbles and the like from being introduced when the photosensitive material film 1 from which the support film 3 has been peeled off is directly adhered onto the original plate 5, a roller 10 is used.
When the photosensitive material film 1 is brought into close contact with the photosensitive material film 1 while being pressed from above, as shown in FIG. 3A, when the photosensitive material film 1 is brought into close contact with the entire surface of the original 5, the photosensitive material corresponding to the edge 5 ′ of the original 5 is exposed. The force concentrates on the position of the material film 1 and is scratched, which is not preferable. Therefore, as shown in FIG. 2B, the photosensitive material film 1 is applied to the roller 10 in the central region avoiding the edge 5 'instead of the entire surface of the original 5 as described above.
Stick tightly while squeezing. Then, as shown in FIG. 3B, the photosensitive material film 1 that is not in close contact with both ends of the roller 10 in the ironing direction is lifted from the original plate 5 and held at a small angle α with respect to the surface thereof. When the photosensitive material film 1 and the original plate 5 are adhered in this manner, there is no penetration of air bubbles and the like, and no scratch is made on the position corresponding to the edge 5 ′ of the original plate 5. The angle α is determined by the adhesive force F of the photosensitive material layer 2 of the photosensitive material film 1 to the master 5.
Α <sin according to the tension f of the photosensitive material film 1
^-1 (f / F), but when it is set in the range of 2 to 10 °, the photosensitive material film 1 is not scratched, and
The photosensitive material film 1 does not peel off from the master 5 during the replication of the master 5.

When the original 5 is duplicated by irradiating a laser beam, it is desirable to use a non-reflective coated glass or the like for the purpose of removing noise such as back reflection of incident light. When the hologram master 5 is a reflection type, FIG.
As shown in the figure, the layer structure is such that the antireflection coated glass 11, the optical contact liquid 12, the support film 4, the photosensitive material 2, the hologram master 5, and the light absorbing material 13 are arranged in this order from the laser beam 7 incident side. When the hologram master 5 is of a transmission type, as shown in FIG.
1, hologram master 5, photosensitive material 2, support film 4
It is desirable to carry out optical duplication with the following layer configuration. In addition,
In the case of the reflection type, the non-reflection coated glass 11 may be provided instead of the light absorbing material 13 so that the light transmitted through the original 5 is not reflected on the back surface.

Prior to the optical duplication by the laser beam 7, ionizing radiation, such as ultraviolet light, for sensitizing the photosensitive material 2 is applied to the outside of the area of the photosensitive material 2 where duplication is to be performed. It is desirable to add an ionizing radiation masking device for sufficiently exposing the area outside the region to be exposed and losing the photosensitivity by the laser beam 7). More specifically, as shown in FIG. 5A, a contact exposure in which a trimming mask 14 is brought into close contact with the photosensitive material film 1 and exposed with ultraviolet light 15, and as shown in FIG. Is separated from the photosensitive material film 1 and projected by divergent light 17 from an ultraviolet light source 16 or the like. There is a space for a pressure roller 10 (FIG. 2), a non-reflection coated glass 11 (FIG. 4), and the like. The photosensitive material film 1
For convenience of preparation above, projection exposure is more advantageous.

When the duplicate film 1 is peeled off from the original plate 5 after the optical duplication by the laser light 7 as described above, an ionizing radiation exposure irradiation apparatus for reducing the adhesiveness of the duplicate film 1 is required. This can be achieved by removing the trimming mask 14 from the ionizing radiation masking apparatus in the previous step and using only the ultraviolet light 15 or 17. In addition, in order to reduce the adhesiveness of the master 5 itself, the surface of the master 5 to which the duplicate film 1 is in close contact is coated with a fluorine release agent
It is desirable to perform a release treatment in advance with a silicone-based release agent or the like.

By the way, as a method of peeling the duplicated film 1 from the original plate 5, if one end is simply pulled up, a difference in the peeling speed occurs in the plane, and the peeling stops or is slow along the peeling front at a position. Striping unevenness such as streaks occurs, and a defect occurs in a copy that has been formed with a good angle. That is, as shown in FIG. 6A, when the duplicated film 1 is pulled upward from one end, the film is rapidly peeled at first to the position shown in the figure, the peeling stops once at that position, and then this time, as shown in FIG. Is rapidly removed to the position. If such non-continuous peeling is performed, in this case, streaks will be formed on the duplicated film 1 at the and positions. In order to suppress this, based on the present invention, as shown in FIG.
As in the case of the pressure bonding (FIG. 2), it is desirable that the copy film 1 be sequentially peeled while being pressed by the roller 18. Also in this case, the diameter of the roller 18 is preferably small, and the roller 10 used at the time of pressing may be used as the peeling roller 18 by reverse rotation.

Since the duplicated film 1 thus peeled has the photosensitive material 2 surface exposed, it is necessary to attach a protective sheet to the photosensitive material 2 surface side in order to wind it up. For this purpose, as shown in FIG. 6B, a protective film 20 having an adhesive layer or an adhesive layer on one surface is applied to the duplicate film 1 peeled off via a roller 19 rotating opposite to the roller 18 so that the adhesive layer or the adhesive Make sure that the layers are facing each other. In this case, after laminating the protective film 20 to the duplicate film 1, an ionizing radiation treatment may be required to increase the adhesive strength. In such a case, it is necessary to provide an ionizing radiation irradiation device. In addition, by making the protective film 20 have a high release property,
The duplicate film 1 can be of a seal type.

When the original 5 is duplicated, a long film is usually used as the film 1, and the film 1 is intermittently fed onto the original 5 by a length obtained by adding the dimension of one frame to the distance between frames. While performing multiple periodic duplications. That is, as shown in FIG.
Is replicated periodically. When duplicating the original 5 by such intermittent feeding, the film 1 before and after exposure is usually conveyed by some kind of nip roller (roller pair).
Is stopped, and during that time, the pressure of the roller continues to be applied to the nip roller stop position of the film 1 to form a streak-shaped dent. If this dent is formed at a position corresponding to the hologram area A, it is flawed, which is not preferable.

Therefore, as shown in FIG. 8, all the distances x and x 'along the film path from the center line of the nip rollers R and R' before and after exposure along the film path satisfy the following relationship. If the positions of the nip rollers R and R 'are set, the streak-shaped dent due to the stoppage of the feeding of the film 1 during shooting is located at the interval between frames between the hologram areas A, and when the hologram area A is cut out No adverse effects on any of the products. It should be noted that the frame interval b should be selected so as to be larger than the nip width of the nip rollers R and R '(the width of the stripe-shaped recess). n (a + b) + a / 2 <x, x '<n (a + b) + a /
2 + b where n is zero or a positive integer.

When a reflection type hologram master 5 is used as shown in FIG. 4 (a), an optical contact is provided on the laser light 7 incidence side of the film 1 in order to remove noise such as back reflection of incident light. The anti-reflection coated glass 11 is brought into close contact with the liquid (refractive index matching liquid) 12. This refractive index matching liquid 1
When 2 spreads in the longitudinal direction of the film 1 and advances in the film feed direction while adhering, the solvent for the refractive index matching liquid 12 such as xylene, isoper, or cargel is usually used. It is transferred to a transport roller made of a material such as an IIR rubber-based material, causing a change in the shape, a change in dimension, a change in hardness, and a problem such as a nip mark remaining on the film 1 occurs. Must be prevented. Further, if such a refractive index matching liquid 12 goes around the photosensitive material layer 2 on the back surface of the film 1, the photosensitive material 2 is damaged, and this must also be prevented.

In order to prevent these problems, FIG. 9A is a sectional view along the film advancing direction, FIG. 9B is a sectional view along the transverse direction of the film, and FIG. Before pressing the non-reflection coated glass 11 against the film 1, first, the refractive index matching liquid 12 spreading in the film advancing direction is applied to the film 1 which is in close contact with the original 5 outside the effective duplication area near both ends of the original 5. Lightly press the barrier members 60, 60 to be stopped. Further, in order to prevent the refractive index matching liquid 12 from flowing around the photosensitive material layer 2 on the close contact side of the film 1, grooves 61, 61 are provided on the surface of the original 5 along both sides in the film traveling direction. 5, both sides and grooves 61, 6
1 and the bank portions 62, 62 are formed between
Are positioned on the banks 62, 62.
In this way, even if the refractive index matching liquid 12 dropped from the refractive index matching liquid supply pipe 63 overflows and tries to reach the photosensitive material layer 2 of the film 1, it is blocked by the bank 62, and even if it gets over it. , Falls into the groove 61 and does not reach the photosensitive material 2 in the effective duplication area, so that the photosensitive material 2 is not damaged.

In addition, the refractive index matching liquid 1
As for the barrier members 60, 60 for stopping the spread of 2,
As shown in FIG. 3B, when the film 1 outside the effective duplication area is inclined upward, it can be omitted.

By the way, when the refractive index matching liquid 12 is dropped on the film 1 for which such a measure is taken to prevent the refractive index matching liquid 12 from spreading and wrapping, as shown in FIG. For example, when the refractive index matching liquid supply pipe 63 whose tip is branched into two or more and can drop the refractive index matching liquid 12 from a plurality of holes at the same time is used, the dropping time is short and the refractive index matching liquid 12 is efficiently and uniformly. It is desirable because it can be dropped.

Next, after the master 5 has been duplicated, the antireflection coated glass 11 is removed from the film 1 and the film 1 is left as it is.
Is wound up, the remaining refractive index matching liquid 12 damages the transport roller in the same manner as described above, destroys the photosensitive material 2, and it is not desirable that the liquid refractive index matching liquid 12 adheres to the product. . Further, it is necessary to prevent the refractive index matching liquid 12 from adhering to the non-reflection coated glass 11 separated upward from the film 1 and dropping onto the original plate 5 or to an undesired position on the film 1. .
Therefore, first, the adhesive surface of the film 1 of the non-reflection coated glass 11 is subjected to a water-repellent treatment with a fluorine-based water-repellent agent, a silicone-based water-repellent agent or the like in advance.

Then, as shown in FIG. 10, the refractive index matching liquid 12 remaining on the film 1 is wiped by a squeegee (wiper) 64 formed in a concave (bow) curved shape in the wiping direction indicated by an arrow. It is desirable to take. Instead, a sponge may be brought into contact and absorbed, or may be scraped off with an air doctor. Then, it is desirable that the remaining refractive index matching liquid 12 is further dried.

As is apparent from the above description, in the hologram duplication method of the present invention, the photosensitive material film is brought into close contact with the original hologram to be duplicated, and light is irradiated from the photosensitive material film side or from the opposite side to copy the hologram. In the hologram duplication method of duplicating the original, the support film on one surface is peeled off while supplying the photosensitive material film sandwiching both surfaces of the photosensitive material with the support film, and the peeled surface is directed toward the hologram original to be copied. Roll the photosensitive material film from the opposite side onto the hologram master to be copied while rolling with a roller, irradiate light from the photosensitive material film side or the opposite side, and then press the photosensitive material film stuck from the replica hologram master with the roller While peeling one from the other end, a protective film is applied to the peeled surface of the peeled photosensitive material film. Sequentially paste, then, it is a method characterized by winding the photosensitive material film.

In this case, the original hologram to be copied is formed in the order of release agent layer / cover glass / adhesive layer / hologram layer / light absorbing layer / adhesive layer / substrate / light absorbing layer, or It is desirable that some or all of the layers are laminated in the order of agent layer / cover glass / adhesive layer / hologram layer / adhesive layer / colored glass.

The hologram layer of the original hologram to be copied is composed of a plurality of layers having different diffraction wavelengths or diffraction angles, and a barrier layer is provided between these layers and between the upper and lower layers. There may be.

It is preferable that the photosensitive material film from which the support film on one surface has been peeled off is sequentially adhered to the original hologram master only with a roller only in a central region of the original hologram master avoiding both end edges in the roller ironing direction. further,
In this case, it is desirable to lift the photosensitive material film, which is not in close contact with the master near the both ends in the roller ironing direction of the master hologram to be copied, from the master and hold it at a small angle to the surface.

A long photosensitive material film is used, and at least one nip roller is used before and after the duplication position to intermittently add the inter-frame distance b to the dimension a of one frame on the original plate. It is desirable to perform a plurality of periodic duplications while feeding only the photosensitive material film, and to dispose the nip roller so that the distance x along the film path from the center line of the nip roller along the film path satisfies the following relationship. . n (a + b) + a / 2 <x <n (a + b) + a / 2 + b where n is zero or a positive integer.

The duplicate hologram according to the present invention is:
A long photosensitive material film comprising at least one adhesive layer or pressure-sensitive adhesive layer and at least one photosensitive material layer and having both sides sandwiched by a support film, having a constant hologram duplication area having a constant film longitudinal dimension. It is characterized by being formed periodically at intervals between frames.

In this case, a volume phase type hologram can be recorded in the hologram duplication area,
Further, the hologram may not be recorded in an area other than the hologram duplication area.

It is preferable that at least the support film in contact with the adhesive layer or the adhesive layer is configured to be peelable.

[0032]

In the present invention, the support film on one side of the photosensitive material is peeled off while supplying the photosensitive material film in which both sides of the photosensitive material are sandwiched between the support films, and the peeled surface is turned to the hologram master to be copied. While squeezing the photosensitive material film from the side with a roller, successively sticking it to the hologram master to be copied, irradiating light from the photosensitive material film side or the opposite side, and then holding down the photosensitive material film stuck from the hologram master to be copied with the roller Peeled sequentially from one end, a protective film is sequentially applied to the peeled surface of the peeled photosensitive material film, and then the photosensitive material film is wound up, so that when laminating the film to the original plate, there is no intrusion of bubbles and the like, When the film is peeled off from the original plate, peeling unevenness such as streaks does not occur.

[0033]

Embodiments of the hologram duplication method according to the present invention will be described below. EXAMPLE 1 An original Lippmann hologram (reflection hologram) is photographed using an optical system as shown in FIG. That is, using the Ar laser 21, the light oscillated therefrom is split into two light beams by the half mirror 22,
One light passes through a mirror 23 and a lens 24,
5, the divergent light emitted from the pinhole 25 is obliquely incident from one side of the photosensitive material 26. The other split light is condensed on the pinhole 30 via the mirrors 27 and 28 and the lens 29, and the divergent light emitted from the pinhole 30 is incident on the other side of the photosensitive material 26,
Both divergent beams interfere in the photosensitive material 26 and are recorded therein. The photosensitive material 26 is manufactured by DuPont, USA.
Mnidex-352 holographic recording film is used. The exposure amount is the wavelength 514 from the Ar laser 21.
It is 30 mJ / cm ² for light of nm. After exposure, the photosensitive material 26 on which the hologram was recorded was exposed to an ultra-high pressure mercury lamp for 100 m.
J / cm ² uniform exposure is performed, and the glass plate is sealed with an optical adhesive (NOA-61, manufactured by Norland USA) to obtain a hologram master 35. And this hologram master 35
The surface to which the photosensitive material film for copying is closely adhered is subjected to a release treatment with a fluorine-based release agent, a silicone-based release agent, or the like. Also, as shown in FIG. 9B, grooves 6 are formed on the surface of the hologram master 35 (5 in FIG. 9) along the both sides in the film advancing direction of the surface where the photosensitive material film for duplication is in close contact.
1 and 61, and both sides of the original 35 (5) and the grooves 61 and 6 are provided.
Bank portions 62, 62 are formed between the two.

Next, this hologram master 35 is incorporated in a copying apparatus as shown in FIG. In this apparatus, an Omnidex-352 holographic recording film having a three-layer structure of a support film 3, a photosensitive material 2, and a support film 4, as shown in the cross section in FIG. Used. As shown in the cross section in FIG.
0 μm thick PET (polyethylene terephthalate) 51 /
1 μm thick optical adhesive (NOA-6, manufactured by Norland Corp., USA)
1) A protective film made of 52/50 μm thick PET53 is used.

The structure of this device will be described together with its operation.
First, the film 1 sent out from the unwinding roller 31 on which the photosensitive material film 1 for copying is set is cleaned through a cleaner roller 44 constituting one nip roller, and a support film constituting another nip roller The support film 3 on one side is peeled off by the peeling roller 32. The separated support film 3 is taken up by a take-up roller 33. On the other hand, the exposed film 1 on the surface of the photosensitive material 2 moves while pressing the pressure roller 37 from the position of the original 35 slightly to the right from the left end in the figure to the right in the figure, and the upper left slightly before the right end. Then, the original 35 is laminated on the central area of the glass plate of the original plate 35. At this time, the arrangement of the support film peeling roller 32 and the stop position of the pressure roller 37 are adjusted so that the lifting angle α (FIG. 3B) of the photosensitive material film 1 at both ends of the original plate 35 is about 2 to 10 °. Set.

Next, barrier members 60, 60 as shown in FIG. 9 are inserted over the original plate 35 from the side onto the original plate 35 laminated with the film 1, and the effective duplication area near both ends of the original plate 35 (5). Lightly press on the film 1 which is in close contact with the outside. Then, as shown in FIG. 9 (c), for example, the refractive index matching liquid supply pipe 63 from which the tip is branched into two or more and from which a refractive index matching liquid (index matching liquid) can be dropped simultaneously from a plurality of holes is placed from the side. Xylene is inserted above the master 35 and an appropriate amount of xylene is dropped as a refractive index matching liquid on the film 1 attached to the master 35. After that, the refractive index matching liquid supply pipe 63 is retracted, and then carefully so as not to trap bubbles. An anti-reflection coated glass 34 is placed thereon. The contact surface of the non-reflection coated glass 34 with the refractive index matching liquid has been previously subjected to a water-repellent treatment with a fluorine-based water-repellent agent, a silicone-based water-repellent agent, or the like.

Thereafter, by projecting and exposing ultraviolet light 46 from an ultra high pressure mercury lamp (not shown) through the chrome trimming mask 36, only the central portion of the laminated area of the photosensitive material 2 is shielded from light, and the other peripheral portions are exposed to 30 mJ / cm.
Exposure is performed with the amount of ² to lose photosensitivity, and trimming (masking) is performed.

Next, the original 35 is irradiated from the film 1 side with an Ar laser beam 47 conjugate to that at the time of original photographing (irradiation amount: 3).
0 mJ / cm ² ) for replication.

After the above exposure, the antireflection coated glass 34 is peeled off from the film 1, and in the meantime, as shown in FIG. 10, a squeegee (wiper) 64 curved concavely (bowed) in the wiping direction of the arrow is removed. The refractive index matching liquid is cleaned by inserting, gently pressing onto the film 1 and wiping in the direction of the arrow, and further drying the remaining refractive index matching liquid with heated air.

Next, the copy film 1 is peeled off by moving the copy film peeling roller 37 also serving as a pressure roller while pressing it to the left in the drawing, and the film 1 is added by one frame. Send out the length. At this time, the protective film 50 with the adhesive layer 52 is adhered to the duplicated film 1 on the side of the photosensitive material 2 by the laminating roller 38 constituting another nip roller. On this occasion,
Protective film 50 supplied from unwind roller 40
The cover sheet 51 (PET having a thickness of 50 μm) is peeled off by the peeling roller 39 and wound up by the winding roller 41.

The duplicate film 1 on which the protective film 50 is adhered enters the ultraviolet irradiator 42 through another nip roller 54 for transportation and the like, and emits ultraviolet light 49 from an unshown ultra-high pressure mercury lamp in an amount of 100 mJ / cm ² . After being exposed, it is taken up by a take-up roller 43. The exposure with the ultraviolet light 49 is a process for increasing the adhesive strength of the adhesive layer 52. In order to remove static electricity generated by the peeling rollers 32 and 39, antistatic devices 4 are provided at respective positions.
5 is attached.

The nip rollers 44, 3
The distance x along the path of the film 1 from the center line of the original 35 of 2, 38, 54 so as to satisfy the relationship of n (a + b) + a / 2 <x <n (a + b) + a / 2 + b according to the relationship of FIG. Is set. Here, a is the dimension of the hologram recording area formed by one copy in the film 1 traveling direction (dimension of one frame), b is the distance between each hologram recording area in the film 1 traveling direction, and n is zero or positive. Is an integer. The nip rollers 44, 32, 38, 54 are configured to be position-adjustable in a direction along the path of the film 1 so as to satisfy such a relationship.

In such an apparatus, the photosensitive material film 1 and the protective film 50 in FIGS.
And the layer structure in a state where they are bonded together is shown in FIG.
It is like. By peeling off the cover sheet 53 of the final product cut into a sheet, the sheet can be adhered to the article as a hologram seal.

By using the hologram duplication apparatus having the above-described configuration, it is possible to continuously and efficiently produce a good duplicate hologram free from the occurrence of duplication defects due to foreign matters such as dust and air bubbles and having no peeling unevenness. it can.

Embodiment 2 A full-color Lippmann hologram (reflection type hologram) master is manufactured using an optical system as shown in FIG. First, Omnidex-70 manufactured by Dupont of the United States was applied to 1 mm thick glass (original plate protective glass).
5 The holographic recording film was peeled off from the cover sheet and laminated, and then the base sheet of the holographic recording film was peeled off and 5 μm
A thick PVA (polyvinyl alcohol) film (preferably non-stretched) is laminated, and the laminate is sandwiched between two glass sheets subjected to anti-reflection coating treatment via an index matching liquid (preferably xylene), and photographed. A dry plate (photosensitive material) 26 is set at the position shown in the figure. The optical system is almost the same as that of FIG. 11, but in this case, three lasers are used to capture a full-color hologram. That is, a dye laser 72 (576) using a Kr laser 71 (647 nm) as an R light source and an Ar laser as an excitation laser 74 as a G light source.
nm) as an Ar laser 73 (458n) as a light source for B.
m), a total reflection mirror 75 and dichroic mirrors 76 and 77 are used in order to combine the laser beams from these into one optical path. In the case of the arrangement shown in the figure, the dichroic mirror 76 is a red narrow band mirror having a non-reflection coating on the back surface, and the dichroic mirror 77 is a mirror having a non-reflection coating on the back surface and selectively reflecting only light having a wavelength of 500 nm or more. However, the arrangement of the lasers 71 to 73 is not limited to the illustrated one and can be changed. In this case, the total reflection mirror 75 and the dichroic mirrors 76 and 7 can be used.
The arrangement of 7 and the reflection band need to be changed.

In such an arrangement, first, a hologram is recorded using only a Kr laser beam (647 nm).
Exposure energy is 30 mJ / cm ² , and after exposure, uniform exposure of 100 mJ / cm ² is performed with an ultra-high pressure mercury lamp. next,
After removing the two non-reflective coated glasses and drying the index matching liquid, Omnidex-705 and the PVA layer are sequentially laminated on the PVA film surface in the same manner as described above, and sandwiched again with the two non-reflective glass, The photographing dry plate 26 is used.

The laser light was converted to dye laser light (576 n
m), and similarly expose 30 mJ / cm ² uniformly,
Performs uniform exposure with an ultra-high pressure mercury lamp. Further, the same process is repeated, and the laser beam is changed to an Ar laser beam (458 nm).
And the third exposure is performed. After the uniform exposure, the non-reflective glass is removed, the index matching liquid is dried, and an original substrate glass having a thickness of 10 mm is adhered to the surface thereof via an optical adhesive (NOA-61, manufactured by Norland USA).

Further, a black spray (SSP spray black, manufactured by Atom Chemical Co., Ltd.) is uniformly applied to the surface of the original substrate glass and dried to form a halation preventing layer. Also,
The surface of the original protective glass is coated with a silicone release agent (KE42
TS ', manufactured by Shin-Etsu Silicone Co., Ltd.) to form a release layer. This is referred to as a copy original 35.

Then, as shown in FIG. 9 (b), grooves are formed in the surface of the hologram master 35 (5 in FIG. 9) along both sides in the film advancing direction of the surface where the photosensitive material film for copying is brought into close contact. 61, 61 are provided, and bank portions 62, 62 are formed between both sides of the original plate 35 (5) and the grooves 61, 61.

Next, this hologram master 35 is incorporated in a copying apparatus as shown in FIG. In this apparatus, an Omnidex-705 holographic recording film having a three-layer structure of a support film 3, a photosensitive material 2, and a support film 4, as shown in the cross section of FIG. Used. As shown in the cross section in FIG.
0 μm thick PET (polyethylene terephthalate) 51 /
1 μm thick optical adhesive (NOA-6, manufactured by Norland Corp., USA)
1) A protective film made of 52/50 μm thick PET53 is used.

The structure of this device will be described together with its operation.
First, the film 1 sent out from the unwinding roller 31 on which the photosensitive material film 1 for copying is set is cleaned through a cleaner roller 44 constituting one nip roller, and a support film constituting another nip roller The support film 3 on one side is peeled off by the peeling roller 32. The separated support film 3 is taken up by a take-up roller 33. On the other hand, the exposed film 1 on the surface of the photosensitive material 2 moves while pressing the pressure roller 37 from the position of the original 35 slightly to the right from the left end in the figure to the right in the figure, and the upper left slightly before the right end. Then, the original 35 is laminated on the central area of the glass plate of the original plate 35. At this time, the arrangement of the support film peeling roller 32 and the stop position of the pressure roller 37 are adjusted so that the lifting angle α (FIG. 3B) of the photosensitive material film 1 at both ends of the original plate 35 is about 2 to 10 °. Set.

Next, barrier members 60, 60 as shown in FIG. 9 are inserted above the original plate 35 from the side onto the original plate 35 laminated with the film 1, and an effective duplication area is formed near both ends of the original plate 35 (5). Lightly press on the film 1 which is in close contact with the outside. Then, as shown in FIG. 9 (c), for example, the refractive index matching liquid supply pipe 63 from which the tip is branched into two or more and from which a refractive index matching liquid (index matching liquid) can be dropped simultaneously from a plurality of holes is placed from the side. Xylene is inserted above the master 35 and an appropriate amount of xylene is dropped as a refractive index matching liquid on the film 1 attached to the master 35. After that, the refractive index matching liquid supply pipe 63 is retracted, and then carefully so as not to trap bubbles. An anti-reflection coated glass 34 is placed thereon. The contact surface of the non-reflection coated glass 34 with the refractive index matching liquid has been previously subjected to a water-repellent treatment with a fluorine-based water-repellent agent, a silicone-based water-repellent agent, or the like.

Thereafter, by projecting and exposing ultraviolet light 46 from an ultra high pressure mercury lamp (not shown) through the chrome trimming mask 36, only the central portion of the laminated area of the photosensitive material 2 is shielded from light, and the other peripheral portions are exposed to 30 mJ / cm.
Exposure is performed with the amount of ² to lose photosensitivity, and trimming (masking) is performed.

Next, an Ar laser beam, a Kr laser beam, and a dye laser beam 47 conjugated with those at the time of the original photographing were applied to the film 1.
Irradiate the master 35 in order from the side (irradiation amount: 30 mJ / cm
² ) Perform duplication.

After the above exposure, the antireflection coated glass 34 is peeled off from the film 1, and in the meantime, as shown in FIG. 10, a squeegee (wiper) 64 concavely curved (bowed) in the wiping direction of the arrow is removed. The refractive index matching liquid is cleaned by inserting, gently pressing onto the film 1 and wiping in the direction of the arrow, and further drying the remaining refractive index matching liquid with heated air.

Next, the copy film 1 is peeled off by moving the copy film peeling roller 37 also serving as a pressure roller while pressing it to the left in the drawing, and the film 1 is added by one frame. Send out the length. At this time, the protective film 50 with the adhesive layer 52 is adhered to the duplicated film 1 on the side of the photosensitive material 2 by the laminating roller 38 constituting another nip roller. On this occasion,
Protective film 50 supplied from unwind roller 40
The cover sheet 51 (PET having a thickness of 50 μm) is peeled off by the peeling roller 39 and wound up by the winding roller 41.

The duplicate film 1 on which the protective film 50 is adhered enters the ultraviolet irradiator 42 via another nip roller 54 for conveyance and the like, and emits ultraviolet light 49 from an unshown ultra high pressure mercury lamp at an amount of 100 mJ / cm ² . After being exposed, it is taken up by a take-up roller 43. The exposure with the ultraviolet light 49 is a process for increasing the adhesive strength of the adhesive layer 52. In order to remove static electricity generated by the peeling rollers 32 and 39, antistatic devices 4 are provided at respective positions.
5 is attached.

The nip rollers 44, 3
The distance x along the path of the film 1 from the center line of the original 35 of 2, 38, 54 so as to satisfy the relationship of n (a + b) + a / 2 <x <n (a + b) + a / 2 + b according to the relationship of FIG. Is set. Here, a is the dimension of the hologram recording area formed by one copy in the film 1 traveling direction (dimension of one frame), b is the distance between each hologram recording area in the film 1 traveling direction, and n is zero or positive. Is an integer. The nip rollers 44, 32, 38, 54 are configured to be position-adjustable in a direction along the path of the film 1 so as to satisfy such a relationship.

In such an apparatus, the photosensitive material film 1 and the protective film 50 shown in FIGS.
And the layer structure in a state where they are bonded together is shown in FIG.
It is like. By peeling off the cover sheet 53 of the final product cut into a sheet, the sheet can be adhered to the article as a hologram seal.

Although the embodiments of the hologram duplication method and the obtained duplicate hologram of the present invention have been described above, the present invention is not limited to this embodiment, and various modifications are possible.

[0061]

As is apparent from the above description, in the hologram duplication method of the present invention, while supplying a photosensitive material film in which both surfaces of the photosensitive material are sandwiched between support films, the support film on one surface is peeled off. With the peeled surface facing the hologram master to be copied, the photosensitive material film is sequentially adhered to the hologram master to be copied from the opposite side while being squeezed with a roller, and light is irradiated from the photosensitive material film side or the opposite side thereof. The photosensitive material film attached from the duplicated hologram master is peeled off from one end while holding it with a roller, a protective film is sequentially attached to the peeled surface of the peeled photosensitive material film, and then the photosensitive material film is wound up. When laminating the film, there are no bubbles etc., and the film is peeled off from the original Yellow, uneven separation of streaks or the like does not occur. Thus, a high-quality duplicate hologram of the present invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a hologram duplication method of the present invention.

FIG. 2 is a diagram for explaining a film laminating method according to the present invention.

FIG. 3 is a view for explaining a state in which a hologram master edge is scratched on a laminated film and a method for preventing the scratch.

FIG. 4 is a diagram showing a layer configuration at the time of hologram replication.

FIG. 5 is a diagram for explaining a trimming processing method in hologram replication.

FIG. 6 is a diagram for explaining a film peeling method according to the present invention.

FIG. 7 is a diagram showing an arrangement of a hologram duplication region of a film duplicated according to the present invention.

FIG. 8 is a diagram for explaining an arrangement position of a nip roller before and after exposure according to the present invention.

FIG. 9 is a diagram for explaining a configuration for dropping a refractive index matching liquid on a film and a configuration for preventing the refractive index matching liquid from spreading to the back surface.

FIG. 10 is a diagram for explaining a configuration for wiping the refractive index matching liquid.

FIG. 11 is a diagram illustrating a configuration of a hologram master photographing optical system according to an embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of an apparatus for performing a hologram duplication method according to one embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a hologram master photographing optical system according to another embodiment of the present invention.

[Explanation of symbols]

 A: hologram duplication area R, R ': nip roller 1: photosensitive material film 2: photosensitive material 3, 4, support film 5: hologram master 5': edge of master 6: optical contact liquid 7: laser beam 8: Diffraction light 9 ... Dust 10 ... Crimping roller 11 ... Non-reflection coated glass 12 ... Optical adhesion liquid (refractive index matching liquid) 13 ... Light absorbing material 14 ... Trimming mask 15 ... Ultraviolet light 16 ... Ultraviolet light source 17 ... Emitted light 18 ... Exfoliation Roller 19 ... Roller 20 ... Protective film 21 ... Ar laser 22 ... Half mirror 23,27,28 ... Mirror 24,29 ... Lens 25,30 ... Pin hole 26 ... Photosensitive material 31 ... Unwind roller 32 ... Support film peeling Roller 33: Winding roller 34: Non-reflective coated glass 35: Hologram master 36: Chrome trimming mask 37 ... Compression / peeling roller 38 ... Laminating roller 39 ... Peeling roller 40 ... Unwinding roller 41 ... Winding roller 42 ... UV irradiator 43 ... Winding roller 44 ... Cleaner roller 45 ... Antistatic device 46 ... Ultraviolet light 47 ... Ar Laser light 49 ... Ultraviolet light 50 ... Protective film 51, 53 ... Cover sheet 52 ... Optical adhesive 54 ... Nip roller 60 ... Barrier member 61 ... Groove 62 ... Banch 63 ... Refractive index matching liquid supply pipe 64 ... Squeegee (wiper) 71 Kr laser 72 Dye laser 73 Ar laser 74 Excitation laser 75 Total reflection mirror 76, 77 Dichroic mirror

Continuation of front page (72) Inventor Yuki Nishimura 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (56) References JP-A-62-160481 (JP, A) JP-A Sho 49-81055 (JP, A) JP-A-4-153686 (JP, A) JP-A-3-53924 (JP, A) JP-A-2-71875 (JP, U) (58) Fields investigated (Int. Cl ^7, DB name) G02B 19/00 -. 21/00 G02B 21/04 - 21/36

Claims (6)

(57) [Claims] 1. A hologram duplication method for duplicating a hologram master to be duplicated by adhering a photosensitive material film to the hologram master to be duplicated and irradiating light from the photosensitive material film side or the opposite side to duplicate the hologram master to be duplicated. While supplying the photosensitive material film sandwiched between the body films, the support film on one surface is peeled off, the peeled surface is directed to the original hologram to be copied, and the photosensitive material film is rolled from the opposite side with a roller, and the hologram to be copied is successively rolled. Attach to the original plate, irradiate light from the photosensitive material film side or the opposite side, and then peel off the photosensitive material film attached from the duplicated hologram master from one end while holding it with a roller, peeling off the peeled photosensitive material film Features that a protective film is sequentially attached to the surface, and then the photosensitive material film is wound up. Hologram duplication method. 2. The hologram master according to claim 1, wherein the hologram to be copied is a mold release agent layer / cover glass / adhesive layer /
Part or all in the order of hologram layer / light absorption layer / adhesive layer / substrate / light absorption layer, or release agent layer / cover glass / adhesive layer / hologram layer / adhesive layer / colored glass A hologram duplication method, wherein a hologram is laminated. 3. The hologram layer of the hologram master to be copied according to claim 1, wherein the hologram layer includes a plurality of layers having different diffraction wavelengths or diffraction angles, and a barrier layer is provided between the layers and between the upper and lower layers. A hologram duplication method, which is provided. 4. The method according to claim 1, wherein the photosensitive material film from which the support film on one surface has been peeled off is sequentially adhered to the center of the duplicated hologram master only with a roller in a central region avoiding both end edges in the roller ironing direction. A hologram duplication method characterized by the above-mentioned. 5. The method according to claim 4, wherein a photosensitive material film that is not in close contact with the original in the vicinity of both ends in the roller ironing direction of the original hologram to be copied is lifted from the original and forms a small angle with respect to the surface thereof. A hologram duplication method, characterized in that the hologram is duplicated. 6. The method according to claim 1, wherein a long photosensitive material film is used and at least one photosensitive material film is provided before and after the duplication position.
Intermittently on the master using two nip rollers
A plurality of periodic duplications are performed while feeding the photosensitive material film by a length obtained by adding the frame distance a to the frame size a, and the distance x along the film path from the original center line of the nip roller is as follows. A hologram duplication method, wherein the nip roller is arranged so as to satisfy the following relationship. n (a + b) + a / 2 <x <n (a + b) + a / 2 + b where n is zero or a positive integer.