JP2014013307A - Hologram manufacturing device and hologram manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hologram manufacturing device capable of manufacturing a hologram with high diffraction efficiency and with high production efficiency.SOLUTION: A hologram manufacturing device 10 includes two or more support members 12, 13, an annular belt 20 supported movably between the two or more support members, and an exposure device which irradiates a region including one section between two adjacent support members in a movement path of the belt with parallel luminous flux. The belt 20 has an annular belt body 22 extended between the two or more support members and a hologram original plate 30 held by the belt body.

Description

  The present invention relates to a hologram manufacturing apparatus and a hologram manufacturing method for manufacturing a hologram by exposing a hologram sensitive material using a hologram master.

  For example, as disclosed in Patent Documents 1 to 3, an interference fringe is recorded on the hologram sensitive material by exposing the reproduction light from the reference light and the hologram original plate to the hologram sensitive material for duplication, thereby producing a hologram. The method is known. Patent Documents 1 and 2 disclose a method using a flat hologram master, and Patent Document 3 discloses a method using a curved hologram original disposed on a drum.

JP-A-7-114330 JP 2000-214752 A JP-A-3-148687

  However, in the methods disclosed in Patent Document 1 and Patent Document 2, a step of arranging a hologram sensitive material on a plate-shaped hologram master, a step of exposing a hologram sensitive material on a hologram original, and an exposed hologram feeling The process of recovering the material from the hologram master must be performed in turn each time the hologram is manufactured. For this reason, holograms are sequentially manufactured while intermittently conveying the hologram sensitive material. Therefore, the methods disclosed in Patent Document 1 and Patent Document 2 cannot significantly increase production efficiency.

  Further, in the method disclosed in Patent Document 3, the web-shaped hologram sensitive material is disposed around the outer peripheral surface of the drum including the curved hologram master disposed on the drum. The hologram photosensitive material moves when the drum rotates, and is exposed when passing through a predetermined section. According to the method disclosed in Patent Document 3, it is possible to continuously record interference fringes on a web-shaped hologram sensitive material and to produce holograms continuously.

  However, in the method disclosed in Patent Document 3, the exposed hologram sensitive material is curved. For this reason, when a parallel light beam is used as the exposure light, the incident angle of light for exposing a predetermined portion of the hologram sensitive material changes with the movement of the hologram sensitive material. For this reason, it is impossible to manufacture a hologram that causes a desired diffraction phenomenon with high diffraction efficiency. In the method disclosed in Patent Document 3, there is a restriction on the incident direction of the reference light with respect to the hologram photosensitive material. In particular, even if the reference light is a parallel light beam, it is extremely difficult to freely set the incident direction of the reference light.

  The present invention has been made in consideration of the above points, and an object thereof is to provide a hologram manufacturing apparatus and a hologram manufacturing method capable of manufacturing a hologram having high diffraction efficiency with high production efficiency.

The hologram manufacturing apparatus according to the present invention includes:
Two or more support members;
A belt movably supported by the two or more support members, the belt having an annular belt body spanned between the two or more support members, and a hologram original plate held by the belt body Belt,
An exposure device that irradiates a parallel luminous flux toward a region including a section between two adjacent support members in the belt movement path, and exposes the hologram photosensitive material supplied on the belt. .

  In the hologram manufacturing apparatus according to the present invention, the supplied hologram sensitive material may have adhesiveness and move together with the belt while being adhered to the belt.

  The hologram manufacturing apparatus according to the present invention is a supply device that supplies the hologram sensitive material onto the belt, and supplies a base material including the hologram sensitive material, a separator that sandwiches the hologram sensitive material, and a support. You may make it further provide the supply apparatus which has a material supply mechanism and the separator collection | recovery mechanism which peels and isolate | separates the said separator of the said original material supplied from the said original material supply mechanism from the said hologram sensitive material.

  The hologram manufacturing apparatus according to the present invention is a collection device for separating and recovering the exposed hologram sensitive material from the belt, and laminating slip sheets on the surface of the hologram sensitive material adhered to the belt. You may make it further provide the collection | recovery apparatus which collect | recovers.

  In the hologram manufacturing apparatus according to the present invention, the surface of the hologram original plate may be subjected to a release treatment, or a release layer may be provided on the side of the hologram original plate facing the hologram sensitive material.

  The hologram manufacturing apparatus according to the present invention may further include a cleaning device for cleaning the belt after the hologram sensitive material is collected.

A hologram manufacturing apparatus according to the present invention is provided at a position between the two adjacent support members along the movement path of the belt, and a support base having a surface that comes into contact with the annular belt from the inner surface side, In addition,
The exposure apparatus may irradiate the hologram light-sensitive material on the belt positioned on the support base with a parallel light beam.

  In the hologram manufacturing apparatus according to the present invention, the belt may further include means for suppressing reflection of zero-order light transmitted through the hologram original plate out of light irradiated from the exposure apparatus.

The hologram manufacturing method according to the present invention comprises:
Supplying a hologram sensitive material onto an annular belt which is a belt having a hologram original plate and moves while being supported by two or more support members;
Irradiating the hologram light-sensitive material that is moving while being supported by the belt between two adjacent support members along the movement path of the belt, and exposing the hologram light-sensitive material;
Recovering the exposed hologram sensitive material from the belt.

  In the hologram manufacturing method according to the present invention, an adhesive hologram sensitive material may be supplied onto the belt, and the hologram sensitive material may be moved together with the belt while being adhered to the belt.

  In the hologram manufacturing method according to the present invention, first, a base material including the hologram sensitive material, a separator for sandwiching the hologram sensitive material, and a support is supplied, and then the separator is removed from the base material. May be supplied onto the belt.

  In the hologram manufacturing method according to the present invention, the exposed hologram sensitive material may be peeled off from the belt, and the slip sheets may be stacked and collected.

  In the hologram manufacturing method according to the present invention, the surface of the hologram original plate may be subjected to a release treatment, or a release layer may be provided on the side of the hologram original plate facing the hologram sensitive material.

  The hologram manufacturing method according to the present invention may further include a step of cleaning the belt after the hologram sensitive material is collected.

  In the hologram manufacturing method according to the present invention, the belt is provided on a surface that is provided at a position between the two adjacent support members along the belt movement path and comes into contact with the annular belt of the support base from the inner surface side. A parallel luminous flux may be irradiated onto the hologram sensitive material that is supported and moving.

  In the hologram manufacturing method according to the present invention, the reflection of the zero-order light transmitted through the hologram original plate may be suppressed by means provided on the belt when the hologram light-sensitive material is irradiated with a parallel light beam. .

  According to the present invention, a hologram having high diffraction efficiency can be manufactured with high production efficiency.

FIG. 1 is a schematic view for explaining an embodiment according to the present invention, and is a perspective view for explaining a hologram production apparatus and a hologram production method. FIG. 2 is a diagram illustrating an example of the configuration of the belt. FIG. 3 is a diagram illustrating an example of a layer configuration of the base material supplied from the supply device of the hologram manufacturing apparatus. FIG. 4 is a diagram for explaining an example of a method for preparing the belt of FIG.

  1 to 4 are diagrams for explaining an embodiment according to the present invention. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

  In the following, an apparatus and a method for manufacturing a reflective volume hologram 85, also called a Lippmann hologram, will be described. The apparatus and method described below can be suitably applied to the reflective volume hologram 85, as will be apparent from the following description. First, the hologram manufacturing apparatus 10 used for manufacturing the hologram 85 will be described, and then the hologram manufacturing method will be described.

  The hologram manufacturing apparatus 10 includes two or more support members 12 and 13, an annular belt 20 that is movably supported by the two or more support members 12 and 13, and two adjacent supports in the movement path of the belt 20. And an exposure device 18 that irradiates a parallel light beam toward a section between the members 12 and 13 and exposes the hologram photosensitive material 80 supplied onto the belt 20. The belt 20 includes one or more hologram masters 30. The hologram manufacturing apparatus 10 further includes a supply device 50 that supplies the hologram sensitive material 80 onto the belt 20 and a collection device 60 that peels and recovers the exposed hologram sensitive material 80 from the belt 20. .

  In this hologram manufacturing apparatus 10, the hologram sensitive material 80 is exposed in a state where it is overlapped with the hologram original plate 30 on the belt 20. At this time, as shown in FIG. 2, the light L21 emitted from the exposure device 18 serves as reference light, and the diffracted light L23 once transmitted through the hologram sensitive material 80 and diffracted by the hologram master 30 serves as object light. The light enters the photosensitive material 80. Interference between the light L21 from the exposure device 18 and the diffracted light L23 generates interference fringes that are bright and dark patterns in the hologram photosensitive material 80. The interference fringes are recorded on the photosensitive hologram material 80 having photosensitivity. Thus, the hologram 85 is manufactured by recording the interference fringes on the hologram sensitive material 80.

  Hereinafter, the configuration of each part of the hologram manufacturing apparatus 10 will be described in detail.

  The supply device 50 supplies the web-shaped hologram photosensitive material 80, in other words, the long hologram photosensitive material 80 wound up in a roll shape onto the belt 20. For the hologram photosensitive material 80, for example, various known hologram photosensitive materials for duplication such as silver salt emulsion and dichromated gelatin can be used. In particular, a photopolymer excellent in terms of diffraction efficiency and handleability is suitable. Can be used.

  In addition, in the embodiment described here, the hologram sensitive material 80 has adhesiveness, and once pressed against the belt 20, it adheres to the belt 20. As used herein, “adhesiveness” refers to the property of being able to adhere to the belt 20 by applying pressure to the belt 20 without applying a separate adhesive. In addition, the terms “adhesion”, “adhesiveness”, and “adhesive” used in the present specification include the meanings of “adhesion”, “adhesiveness”, and “adhesive”, respectively.

  In the form shown in FIG. 1, the supply device 50 includes a base material supply mechanism 52 that supplies a base material 78 configured as a laminate including the hologram sensitive material 80, and a base material supplied from the base material supply mechanism 52. And a separator recovery mechanism 54 for separating and recovering 78 separators 83 from the hologram sensitive material 80. As shown in FIG. 3, in the example described here, the base material 78 includes a support 82, a hologram sensitive material 80, and a separator 83 in this order. The support 82 and the separator 83 function as a protective layer for protecting the hologram sensitive material 80. The support 82 can be made of a resin film, for example. The separator 83 has releasability with respect to the hologram sensitive material 80 having adhesiveness, and can be composed of, for example, a resin film that has been subjected to release treatment.

  In the example shown in FIG. 1, the supply device 50 includes a base material supply roll 52 that forms a base material supply mechanism, a separator collection roll 54 that forms a separator recovery mechanism, and supply guide rolls 56 a and 56 b that guide a base material 78. , 56c. The base material 78 passes through the first supply guide roll 56a and the second supply guide roll 56b, and the separator 83 is peeled off. The base material 78 from which the separator 83 has been peeled off, that is, the laminate of the hologram photosensitive material 80 and the support 82, is pressed toward the belt 20 by the first supply guide roll 56a and the third supply guide roll 56c, respectively. Yes. For this reason, the laminated body of the hologram photosensitive material 80 and the support body 82 passes through the first supply guide roll 56 a, adheres to the belt 20, and moves in synchronization with the belt 20.

  Next, the support members 12 and 13 that support and convey the belt 20 will be described. The support members 12 and 13 can be formed, for example, as support rolls 12 and 13 configured to be rotatable about the central axis thereof. In this embodiment, one or more of the two or more support rolls 12 and 13 function as drive rolls, and the other rolls function as driven rolls, whereby the supported belt 20 can be moved. In the form shown in FIG. 1, two support rolls 12 and 13 are provided as support members that support the annular belt 20 so as to be movable.

  Next, the belt 20 will be described. As shown in FIG. 2, the belt 20 includes an annular belt main body 22 and a hologram original plate 30 held by the belt main body 22. The annular belt body 22 is stretched over two or more support members 12 and 13 and is movable along a movement path defined by the two or more support members 12 and 13. The annular belt body 22 may be formed by connecting both ends of a belt-like belt. When connecting both ends of the belt-like belt, it is preferable to connect the side end surfaces of the belt to face each other so that the surface of the belt main body 22 is not uneven.

  For example, a metal belt can be used as the belt body 22. As a method of manufacturing the belt body 22 by connecting both ends of a belt-shaped metal belt, both ends of the belt-shaped metal belt are connected by welding, and then the welded portion is polished to flatten the surface. The method of doing is illustrated. Another example is a method in which both ends of a belt-shaped metal belt are connected by welding, and then the welded portion is rolled in order to make the thickness uniform. As another method, a method of connecting both ends of a belt-shaped metal belt by rolling is also exemplified.

  One or more hologram masters 30 are bonded onto the belt body 22. More hologram masters 30 are preferably provided on the outer peripheral surface of the belt main body 22, and more preferably, the hologram original masters 30 are spread on the outer peripheral surface of the belt main body 22 without any gaps. According to such a form, it is possible to increase the use efficiency of the hologram photosensitive material 80 continuously drawn out from the supply device 50, that is, the use yield, and to produce more holograms 85 in the same time. It becomes possible.

  The belt 20 may include layers that are expected to have various functions in addition to the hologram master 30. As an example, the belt 20 shown in FIG. 2 includes a peeling layer 26 as a layer that comes into contact with the hologram sensitive material 80 having adhesiveness, and a reflection provided between the hologram master 30 and the belt body 22. And a prevention layer 24. The layers 26, 30, 24 included in the belt 20 and the belt body 22 are bonded to each other via adhesive layers 38, 42, 44. That is, the belt 20 shown in FIG. 2 includes the peeling layer 26, the first adhesive layer 38, the hologram original plate 30, the second adhesive layer 42, the antireflection layer 24, the third adhesive layer 44, and the belt body 22 in this order. Including. One or more layers 26, 38, 42, 24, 44 other than the hologram master 30 may be held on the belt main body 22 corresponding to each hologram master 30.

  In the illustrated example, the hologram photosensitive material 80 is adhered to the belt 20 from the release layer 26 side, and then peeled off from the release layer 26 of the belt 20. That is, as used herein, “laminated on the belt” does not only mean that it is laminated on the belt body 22, but it means that it is laminated on any layer included in the belt 20. Further, as used herein, “peeled off from the belt” or “peeled off from the belt” does not mean that the belt main body 22 is peeled off or peeled off, but any layer included in the belt 20. It means to be peeled off or peeled off.

  As the release layer 26, for example, a resin film having a release treatment applied to the surface facing the hologram sensitive material 80 can be used. By providing such a release layer 26 on the outermost surface of the belt 20, the hologram sensitive material 80 can be peeled from the belt 20 without being damaged after the hologram sensitive material 80 is exposed. The antireflection layer 24 is an example of means for preventing reflection of light used for exposure. The antireflection layer 24 can be made of, for example, a black resin film having visible light absorption.

  Further, as will be described later, the light for exposing the hologram sensitive material 80 is incident on the hologram sensitive material 80 via the release layer 26 and the first adhesive layer 38. Therefore, in order to effectively use the light from the exposure apparatus 18, it is preferable that the release layer 26 and the first adhesive layer 38 have transparency to the light from the exposure apparatus 18.

  Here, with reference to FIG. 4, an example of a method for producing the belt 20 having the layer structure shown in FIG. 2 will be described. First, as shown in FIG. 4, a laminate S <b> 1 including a master original plate 34, an original photosensitive material 31, and a support body 32 in this order is prepared. The support 32 is a layer that supports the original photosensitive material 31. The master sensitive material 31 is a layer that forms the hologram master 30 by recording desired interference fringes, and can be manufactured using the same material as the hologram sensitive material 80 described above. The master original plate 34 is a hologram having interference fringes corresponding to the interference fringes recorded on the hologram original plate 30. The laminate S1 is irradiated with coherent light from the side of the support 32 to expose the photosensitive material 31 for the original plate. At this time, the incident direction of the coherent light on the laminate S1 is the Bragg of the interference fringes recorded on the master original 34 when the light transmitted through the support 32 and the photosensitive material 31 for the original is incident on the master original 34. It is decided to satisfy the conditions. By this exposure, light that passes through the support 32 and enters the original photosensitive material 31, and light that passes through the original photosensitive material 31 and is diffracted by the master original 34 and reenters the original photosensitive material 31. The light and dark pattern is generated on the original photosensitive material 31 by interference. Interference fringes corresponding to this pattern are recorded on the photosensitive material 31 for original plate, and the hologram original plate 30 is obtained.

  After the exposure of the laminated body S1 is completed, the master original plate 34 is removed and the interleaving paper 36 is laminated. The obtained laminated body S2 is subjected to post-processing, for example, heat treatment and UV light irradiation treatment, and the photosensitivity of the hologram master 30 is lost. Thereafter, the interleaf paper 36 is peeled off from the laminated body S2, and the first adhesive layer 38 and the separator 40 are laminated instead to obtain the laminated body S3. Thereafter, the support 32 of the laminate S3 is peeled off, and instead, the second adhesive layer 42 and the antireflection layer 24 are laminated to obtain a laminate S4. Next, the third adhesive layer 44 and the separator 46 are laminated on the antireflection layer 24 side of the laminate S4 to obtain a laminate S5. Thereafter, the separator 40 on the first adhesive layer 38 side of the laminate S5 is peeled off, and instead, the release layer 26 is laminated to obtain a laminate S6. After the separator 46 on the third adhesive layer 44 side of the obtained laminate S6 is peeled off, the laminate S6 is bonded to the belt body 22 via the third adhesive layer 44. By disposing a desired number of the laminated bodies S6 on the belt main body 22, the belt 20 is obtained.

  Next, the exposure device 18 will be described. The exposure device 18 is configured to irradiate the hologram light-sensitive material 80 supported on the belt 20 with a parallel light beam made of coherent light having coherence. As shown in FIG. 1, the exposure device 18 emits coherent light L <b> 21 from the outside of the belt 20. As an example, the exposure apparatus 18 includes a laser light source that oscillates laser light that is coherent light, and an optical system (not shown) that converts the laser light from the laser light source into parallel light fluxes. As the optical system, for example, an optical system including a spatial filter that diverges laser light and removes scattered light and a lens that collimates the divergent light can be used.

  As shown in FIG. 1, a parallel light beam is irradiated toward a region including one section between two adjacent support members 12 and 13 in the movement path of the belt 20 defined by the support members 12 and 13. To do. In the example shown in FIG. 1, the exposure device 18 irradiates a parallel light beam toward the irradiation area IA surrounded by a dotted line. As a result, the hologram photosensitive material 80 provided on the belt 20 is parallel from the support 22 side while moving in synchronization with the belt 20 through one section between the two support members 12 and 13. The light beam is irradiated. Note that a mask may be disposed in the vicinity of the moving path of the belt 20 and the light from the exposure device 18 may be trimmed to irradiate the desired irradiation area IA with a parallel light beam with high accuracy. FIG. 1 illustrates a mask 95 in which a rectangular opening 95a is formed by a two-dot chain line.

  Further, in the embodiment shown in FIG. 1, a support base 15 is provided at a position between two adjacent support members 12 and 13 in the moving path of the belt 20 defined by the support members 12 and 13. It has been. The support base 15 has a flat support surface 16 that contacts the annular belt 20 from the inner surface side. In the example shown in FIG. 1, the exposure device 18 irradiates a parallel light beam onto the support surface 16 of the support table 15. Therefore, the exposure device 18 irradiates the hologram light-sensitive material 80 on the belt 20 positioned on the support base 15 with a parallel light beam.

  By arranging the exposure device 18 outside the belt 20, it is not necessary to make the circumference of the belt 20 longer than necessary. Therefore, the hologram manufacturing apparatus 10 can be downsized by arranging the exposure device 18 outside the belt 20. Further, when the exposure device 18 is arranged outside the belt 20, light enters from the side of the hologram sensitive material 80 of the belt 20 including the hologram sensitive material 80 and the hologram master 30, thereby producing a reflective volume hologram 85. Will come to be. Accordingly, the advantage that the hologram manufacturing apparatus 10 can be reduced in size can be enjoyed, and the hologram manufacturing apparatus 10 described here can be suitably used for manufacturing a reflective volume hologram.

  Next, the collection device 60 will be described. The exposed web-shaped hologram sensitive material 80, in other words, the web-shaped hologram 85 including interference fringes is peeled off from the belt 20 and collected. In the form shown in FIG. 1, the recovery device 60 recovers the hologram 85 by laminating a slip sheet 86 on the side of the surface that has been bonded to the belt 20 as the hologram sensitive material 85.

  As a specific configuration, the collection device 60 shown in FIG. 1 includes a slip sheet supply roll 64 as a slip sheet supply mechanism that supplies the slip sheet 86, a slip sheet 86 and a belt supplied from the slip sheet supply mechanism 64. 20 includes a hologram recovery roll 62 as a hologram recovery mechanism that stacks and recovers the hologram 85 peeled off 20 and the support 82, and recovery guide rolls 66 a and 66 b that guide the hologram 85, the support 82, and the interleaf 86. doing. The hologram 85 and the support 82 adhered to the belt 20 are peeled off from the belt 20 after passing between the belt 20 and the first collection guide roll 66a. Thereafter, when the hologram 85 and the support 82 pass between the first collection guide roll 66a and the second collection guide roll 66b, the interleaf paper 86 is laminated from the side opposite to the support 82 of the hologram 85, Thereafter, the film is wound around the hologram collection roll 62.

  Incidentally, in the hologram manufacturing apparatus 10 shown in FIG. 1, a cleaning device 70 is disposed at a position downstream of the collection device 60 along the movement path of the belt 20 and upstream of the supply device 50. The cleaning device 70 is provided for cleaning the belt 20 to which the hologram sensitive material 80 is bonded. For example, the cleaning device 70 may be configured as a device using a processing liquid, and the processing component may remove adhesive components and the like remaining on the belt 20 even after the hologram sensitive material 80 is peeled off. Further, as another configuration example, the cleaning device 70 may be a roller mechanism that collects deposits such as dust like an adhesive roller, or wipes off deposits such as dust using a waste cloth or the like. A wiping mechanism may be used.

  Next, a method for manufacturing a hologram using the above hologram manufacturing apparatus 10 will be described. The hologram manufacturing method described below mainly includes a step of supplying the hologram sensitive material 80 to a position overlapping the hologram original plate 30 on the annular belt 20, and two support members 12 and 13 adjacent along the moving path of the belt 20. Irradiating the hologram photographic material 80 supported by the belt 20 with a parallel light beam L21 and exposing the hologram photographic material 80, and recovering the exposed hologram photographic material 80 from the belt 20 And a step of cleaning the belt 20 after the hologram sensitive material 80 is collected.

  In the example described below, as shown in the drawing, a web-shaped hologram sensitive material 80 is supplied onto the belt 20 and the web-shaped hologram sensitive material 80 is processed. . Therefore, regarding a certain part of the hologram sensitive material 80, the step of supplying the hologram sensitive material 80, the step of exposing the hologram sensitive material 80, and the step of peeling off the hologram 85 are sequentially performed. On the other hand, when the entire web-shaped hologram photosensitive material 80 is observed, the steps of supplying the hologram photosensitive material 80, exposing the hologram photosensitive material 80, and peeling the hologram 85 are different portions of the hologram photosensitive material 80. Has been implemented in parallel. For this reason, according to the method described below, a large number of holograms 85 can be produced in a short time, which is excellent in terms of production efficiency.

  First, in the process of supplying the hologram sensitive material 80, the web-shaped base material 78 is supplied from the base material supply roll 52. While the base material 78 is being supplied onto the belt 20, the separator 83 included in the base material 78 is recovered by the separator recovery roll 54. As a result, the web-shaped hologram sensitive material 80 is transported together with the support body 82 onto the belt 20 driven by the support members 12 and 13.

  Since the hologram sensitive material 80 has adhesiveness, it adheres to the belt 20 by being pressed toward the belt 20 by the first supply guide roll 56a. The hologram photosensitive material 80 moves with the movement of the belt 20 in synchronism with the belt 20 in a state of being adhered to the belt 20 until it is peeled off from the belt 20 by the collecting device 60.

  The hologram photosensitive material 80 that moves together with the belt 20 is exposed by light emitted from the exposure device 18 in the exposure process. As shown in FIG. 1, the hologram photosensitive material 80 is exposed when moving between the pair of support rolls 12 and 13. Therefore, by keeping the moving speed of the belt 20 constant, the time for each part of the hologram sensitive material 80 to pass through the irradiation area IA by the exposure device 18 becomes constant. Thereby, the exposure conditions can be made uniform among the portions along the longitudinal direction of the hologram sensitive material 80.

  As shown in FIG. 2, the light L21 emitted from the exposure device 18 enters the hologram sensitive material 80 as reference light. The hologram sensitive material 80 is transmissive to the light from the exposure device 18, so that the light L 22 incident on the hologram sensitive material 80 passes through the hologram sensitive material 80 and enters the hologram original plate 30. The exposure device 18 irradiates the parallel light flux along the direction in which the light L22 incident on the hologram master 30 satisfies the Bragg condition of the hologram master 30. As a result, the incident light L22 on the hologram master 30 is diffracted with high diffraction efficiency. Then, the diffracted light L23 from the hologram original plate 30 travels toward the hologram photosensitive material 80.

  As described above, the hologram L-sensitive material 80 has the light L21 irradiated from the exposure device 18 as the reference light, and the diffracted light L23 once transmitted through the hologram-sensitive material 80 and diffracted by the hologram master 30 as the object light. Incident. The light L21 from the exposure device 18 and the diffracted light L23 interfere with each other, so that a bright / dark pattern is generated inside the hologram photosensitive material 80. This light / dark pattern is recorded on the hologram photosensitive material 80 having photosensitivity as interference fringes. Thus, the hologram 85 is manufactured by recording the interference fringes on the hologram sensitive material 80.

  If the moving speed of the belt 20 is constant, the time for the belt 20 to pass through the irradiation region is also constant. Therefore, each position of the web-shaped hologram photosensitive material 80 can be exposed under the same exposure conditions by the exposure device 18 irradiating a certain region. Accordingly, it is possible to record the same interference fringes at each position of the hologram sensitive material 80 and produce the hologram 85 exhibiting the same diffraction characteristics.

  By the way, a part of the light incident on the hologram master 30 passes through the hologram master 30 as zero-order light without being diffracted by the hologram master 30. If such light subsequently changes its traveling direction and enters the hologram sensitive material 80, unnecessary interference fringes are formed on the hologram sensitive material 80, and the diffraction efficiency of the obtained hologram 85 is reduced. There is a possibility. On the other hand, in the illustrated example, the antireflection layer 24 is laminated on the hologram original plate 30 via the second adhesive layer 42. As an example, the antireflection layer 24 is formed as a light absorption layer having an ability to absorb light irradiated from the exposure device 18. Therefore, the subsequent reflection of the zero-order light transmitted through the hologram master 30 can be effectively prevented by the antireflection layer 24. As a result, it is possible to effectively avoid that the diffraction efficiency of the obtained hologram 85 does not reach the expected level.

  The exposed hologram sensitive material 80 is peeled off from the belt 20 and is collected by being overlapped with the interleaf paper 86. At this time, the slip sheet 86 is fed from the slip sheet supply roll 64. The hologram 85 and the support 82 laminated with the slip paper supply roll 64 are wound around the hologram collection roll 62.

  In addition, as shown in FIG. 2, the peeling layer 26 which shows peelability with respect to the hologram sensitive material 80 which has adhesiveness is provided in the outermost surface of the belt 20. As shown in FIG. For this reason, it can be peeled from the belt 20 without damaging the hologram sensitive material 80. In addition, since the belt 20 can be effectively prevented from being damaged when the hologram sensitive material 80 is peeled off, the life of the belt 20 can be extended.

  The belt 20 after the hologram sensitive material 80 is collected is cleaned by the cleaning device 70. In the cleaning process, the adhesive component of the hologram sensitive material 80 remaining on the belt 20 after the hologram sensitive material 80 is peeled off can be removed. By keeping the belt 20 clean, it is possible to effectively prevent foreign matters and the like from being mixed between the belt 20 and the hologram photosensitive material 80. As a result, it becomes possible to continuously irradiate the hologram photosensitive material 80 adhered on the belt 20 with the parallel light beam from the exposure device 18 from a certain direction. That is, it becomes possible to stably manufacture the hologram 85 having desired diffraction characteristics.

  By the way, according to the present embodiment, a parallel light beam is irradiated from the exposure device 18 to the hologram photosensitive material 80. Further, the hologram sensitive material 80 is exposed when moving between the pair of support rolls 12 and 13. The belt 20 that supports the hologram sensitive material 80 is stretched over a pair of support rolls 12 and 13, and can move between the pair of support rolls 12 and 13 along a linear path. Therefore, the hologram photosensitive material 80 continues to be irradiated with the parallel light beam from the exposure device 18 from a certain direction while moving along with the belt 20. Therefore, it is possible to produce a hologram 85 with high diffraction efficiency as compared with the method disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 3-148687) described above.

  In the aspect of exposing a hologram sensitive material arranged on a drum disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 3-148687), reference light is irradiated from a radial direction around the central axis of the drum. By doing so, the incident direction of the reference light to the hologram sensitive material can be made uniform. However, according to such a method, the optical system for shaping the profile of the reference light becomes very large. On the other hand, according to the present embodiment, a widely used parallel light beam is used, so that the exposure apparatus 18 can be simplified and miniaturized.

  Further, in the method disclosed in Patent Document 3, in order to reduce the change in the incident direction of the reference light to the hologram sensitive material, the length of the illumination area along the moving direction of the hologram sensitive material and the circumferential direction of the drum is set. It needs to be shortened. As a result, in order to expose each part of the hologram light-sensitive material with a sufficient amount of light energy, it is necessary to reduce the conveyance speed of the hologram light-sensitive material, and the production efficiency cannot be improved.

  On the other hand, according to the present embodiment, the length of the illumination area IA along the moving path of the belt 20, in other words, the transport path of the hologram sensitive material 80 is increased to make the hologram sensitive material 80 relatively high. The hologram photosensitive material 80 can be exposed with a sufficient amount of light energy while moving at a speed. Thereby, a large number of holograms 85 with high diffraction efficiency can be produced in a short time, which is excellent in terms of production efficiency.

  In addition, in the method disclosed in Patent Document 3, there is a restriction on the incident direction of the reference light with respect to the web-shaped hologram photosensitive material. Specifically, it is possible to irradiate the reference light from a direction inclined with respect to the normal direction to the surface of the drum within a plane perpendicular to the central axis of the drum holding the hologram sensitive material. Irradiating the reference light from a direction inclined with respect to the normal direction to the drum surface in a plane parallel to the central axis of the drum holding the photosensitive material is the size of the optical system and the handling of the optical system. Due to limitations, actual production of holograms is actually extremely difficult.

  On the other hand, according to the present embodiment, for example, as in the example shown in FIG. 1, a direction inclined from the normal direction ND in a plane parallel to both the normal direction ND to the belt surface and the width direction CD. Or the exposure apparatus 18 along a direction inclined from the normal direction ND in a plane parallel to both the normal direction ND and the machine direction MD to the belt surface. Is not particularly superior in terms of the size of the optical system and the handleability of the optical system, and compared with the method disclosed in Patent Document 3, the size of the optical system and the optical system This is extremely advantageous in terms of handling. That is, in consideration of the efficient arrangement of the hologram original plate 30 on the belt main body 22, the traveling direction of the parallel light flux from the exposure device 18 may be selected, whereby a large number of holograms 85 are manufactured in the same time. Can be superior in terms of production efficiency.

  In particular, according to the present embodiment, the support base 15 is provided between the pair of support members 12 and 13. The hologram photosensitive material 80 on the belt 20 that moves while being supported by the flat surface 16 of the support base 15 is irradiated with a parallel light beam from the exposure device 18. For this reason, the incident angle of the reference light to each part of the hologram sensitive material 80 can be effectively maintained during the movement of the hologram sensitive material 80. In addition, the incident angle of the reference light can be effectively made uniform between the positions of the hologram sensitive material 80. For this reason, the highly efficient hologram 85 can be produced with higher production efficiency. Note that the term “flat” used here does not mean only a flat surface with no concavo-convex in a strict sense, but flat enough to expect the effects described here. It is used as a meaning that includes the plane that has it.

  Further, according to the present embodiment, the hologram sensitive material 80 having adhesiveness is supplied onto the belt 20, and the hologram sensitive material 80 moves together with the belt 20 while being adhered to the belt 20. Therefore, the hologram sensitive material 80 is prevented from shifting on the belt 20. Thereby, even if it exposes while moving the hologram sensitive material 80, the incident angle of the reference light to the hologram sensitive material 80 can be maintained effectively. In addition, unlike the method disclosed in Patent Document 3, it is not necessary to hold the hologram sensitive material on the drum by continuously pressing the hologram sensitive material toward the drum. Accordingly, interference fringes can be recorded on the hologram photosensitive material 80 under the same conditions as when the obtained hologram 85 is actually used, more specifically, in a state in which no deformation due to intentional external force occurs. It becomes possible. Thereby, according to the present embodiment, the obtained hologram 85 exhibits the expected diffraction characteristics.

  As described above, according to the present embodiment, the hologram 85 having high diffraction efficiency can be manufactured with high production efficiency.

  Various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings.

  In the above-described embodiment, the example in which the release layer 26 is provided via the first adhesive layer 38 is shown, but the present invention is not limited to this. Even if the first adhesive layer 38 and the release layer 26 are omitted and the release process is performed on the surface of the hologram original plate 30, the same effect can be expected.

  In the embodiment described above, an example is shown in which a layer 44 is provided between the belt body 22 and the hologram master 30 as a means for preventing reflection of zero-order light transmitted through the hologram master 30. However, it is not limited to this. For example, the second adhesive layer 42 and the antireflection layer 24 may be omitted, and the third adhesive layer 44 may be provided with a function of preventing reflection of 0th-order light transmitted through the hologram original plate 30. As a specific example, a component having an ability to absorb light from the exposure apparatus 18 may be included in the third adhesive layer 44. Further, the belt main body 22 may be light transmissive with respect to light from the exposure device 18.

  Furthermore, the exposure device 18 may emit coherent light in two or more wavelength ranges. In this case, the hologram light-sensitive material 80 supplied from the supply device 50 may be composed of a layer that exhibits photosensitivity for both of the two or more wavelength ranges, and is sensitive to each wavelength range. It may be configured to include a plurality of layers shown. According to such a modification, it is possible to produce the hologram 85 with high diffraction efficiency that is reproduced in a plurality of colors with high production efficiency.

  In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

DESCRIPTION OF SYMBOLS 10 Hologram manufacturing apparatus 12, 13 Support member, support roll 15, support stand 16, surface 18 exposure apparatus 20 belt 22 belt main body 24 antireflection layer, antireflection means, light absorption layer 26 release layer, release film 30 hologram original plate 38 adhesive layer, First adhesive layer, transparent adhesive layer 42 Adhesive layer, second adhesive layer 44 Adhesive layer, third adhesive layer 46 Separator 50 supply device 52 Original material supply roll, original material supply mechanism 54 Separator recovery roll, separator recovery mechanism 60 Supply device 62 Hologram recovery roll 64 Interleaf supply roll 70 Cleaning device 78 Original material 80 Hologram sensitive material 82 Support body 83 Separator 85 Hologram 86 Interleaf

Claims (16)

Two or more support members;
A belt movably supported by the two or more support members, the belt having an annular belt body spanned between the two or more support members, and a hologram original plate held by the belt body Belt,
An exposure device that irradiates a parallel luminous flux toward a region including a section between two adjacent support members in the belt movement path, and exposes the hologram photosensitive material supplied on the belt. Hologram manufacturing device. The supplied hologram sensitive material has adhesiveness,
The hologram manufacturing apparatus according to claim 1, wherein the hologram manufacturing apparatus moves together with the belt while being adhered to the belt.   A supply device for supplying the hologram sensitive material onto the belt, the original material supplying mechanism for supplying an original material including the hologram sensitive material, a separator for sandwiching the hologram sensitive material, and a support, and the original material 3. The hologram manufacturing apparatus according to claim 1, further comprising a supply device having a separator recovery mechanism for separating and recovering the separator of the original material supplied from the supply mechanism from the hologram sensitive material.   A recovery device for separating and recovering the exposed hologram sensitive material from the belt, further comprising a recovery device for stacking and recovering slip sheets on the surface of the hologram sensitive material that has been adhered to the belt The hologram manufacturing apparatus as described in any one of Claims 1-3.   The surface of the said hologram original plate is peeled, or the peeling layer is provided in the side which faces the said hologram sensitive material of the said hologram original plate, As described in any one of Claims 1-4. Hologram manufacturing device.   The hologram manufacturing apparatus according to claim 2, further comprising a cleaning device that cleans the belt after the hologram sensitive material is collected. A support base provided at a position between the two adjacent support members along the movement path of the belt, and having a surface that comes into contact with the annular belt from the inner surface side;
7. The hologram manufacturing apparatus according to claim 1, wherein the exposure apparatus irradiates the hologram photosensitive material on the belt positioned on the support base with a parallel light beam.   The hologram production according to any one of claims 1 to 7, wherein the belt further includes means for suppressing reflection of zero-order light transmitted through the hologram original plate, out of light irradiated from the exposure apparatus. apparatus. Supplying a hologram sensitive material onto an annular belt which is a belt having a hologram original plate and moves while being supported by two or more support members;
Irradiating the hologram light-sensitive material that is moving while being supported by the belt between two adjacent support members along the movement path of the belt, and exposing the hologram light-sensitive material;
And recovering the exposed hologram sensitive material from the belt.   The hologram production method according to claim 9, wherein an adhesive hologram sensitive material is supplied onto the belt, and the hologram sensitive material moves together with the belt while being adhered to the belt.   First supplying a base material including the hologram sensitive material and a separator and a support for sandwiching the hologram sensitive material, and then removing the separator from the base material and supplying the hologram sensitive material on the belt, The method for producing a hologram according to claim 9 or 10.   The method for producing a hologram according to any one of claims 9 to 11, wherein the exposed hologram sensitive material is peeled off from the belt and laminated and collected.   The surface of the said hologram original plate is peeled, or the peeling layer is provided in the side which faces the said hologram sensitive material of the said hologram original plate, It is any one of Claims 9-12 Hologram manufacturing method.   The hologram manufacturing method according to claim 9, further comprising a step of cleaning the belt after the hologram sensitive material is collected.   The belt is supported by the belt and moves on a surface that is provided between the two adjacent support members along the movement path of the belt and is in contact with the annular belt from the inner surface side. The hologram manufacturing method according to claim 9, wherein the hologram light-sensitive material is irradiated with a parallel light beam.   16. The reflection of zero-order light transmitted through the hologram original plate when the hologram light-sensitive material is irradiated with a parallel light beam is suppressed by means provided on the belt. Hologram manufacturing method.

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