Holographic interference pattern recording apparatus and recording method using the same

Abstract

The present invention relates to a holographic interference pattern recorder and a recording method using the same, and more particularly to a holographic interference pattern recorder and a recording method using the same that simplify the process of arranging a light source and a photosensitive material to record a holographic interference pattern in a three-dimensional coordinate system and then rearranging the light source and the photosensitive material to record another holographic interference pattern.

Description

Technical Field

[0001] Claim of Priority The present invention claims the benefit of the filing date of Korean Patent Application No. 10-2021-0092621, filed with the Korean Intellectual Property Office on July 15, 2021, and all of its contents are incorporated into the present invention. The present invention relates to a holographic interference pattern recording apparatus and a recording method using the same. Specifically, after aligning a light source and a photosensitive material in a three-dimensional coordinate system to record a holographic interference pattern, the present invention relates to a holographic interference pattern recording apparatus and a recording method using the same, which simplify the process of realigning the light source and the photosensitive material to record another holographic interference pattern.

Background Art

[0002] In order to record a holographic interference pattern on a photosensitive material, generally, it is common to irradiate object light and reference light on the photosensitive material and record the interference pattern realized by the interference phenomenon of the object light and the reference light on the photosensitive material.

[0003] In order to record a specific holographic interference pattern, the irradiation angles at which the object light and the reference light are irradiated on the photosensitive material must be adjusted, so it was necessary to align the object light, the reference light, and the photosensitive material at specific positions.

[0004] That is, in order for a photosensitive material to be applied to a device, it must have a specific shape. Based on the state where the photosensitive material is applied to the device, it is common to record a holographic interference pattern on the photosensitive material. However, when recording a holographic interference pattern based on the state where a photosensitive material having a specific shape is applied to a device, in many cases, the object light, reference light, and photosensitive material need to be arranged in a three-dimensional coordinate system, and there is a problem that it is not easy to arrange each component in the three-dimensional coordinate system. Furthermore, even in the process of replicating the holographic interference pattern recorded on the photosensitive material, the reproduced light is diffracted by the holographic interference pattern to become diffracted light, and the path of the diffracted light is realized in three dimensions. Therefore, not only is it not easy to grasp this, but there is also a problem that it is not easy to derive the paths of the object light and reference light when recording the holographic interference pattern while grasping this path.

[0005] Furthermore, in order to replicate a slightly modified holographic interference pattern, the three-dimensional arrangement of the object light, reference light, and photosensitive material must be changed based on the state where a photosensitive material having a specific shape is applied to the device. Therefore, there is a problem that an excessive amount of time is required for the alignment of the object light, reference light, and photosensitive material.

[0006] Therefore, there was an urgent need to develop a technology that can easily achieve the alignment of the object light, reference light, and photosensitive material even when the holographic interference pattern is changed.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The technical problem to be solved by the present invention is to irradiate a photosensitive material on which a holographic interference pattern is recorded with reproduction light, convert the three-dimensional arrangement of the optical paths formed by the diffracted diffracted light into a two-dimensional arrangement, and then derive the arrangements of the reference light and the object light corresponding to the reproduction light and the diffracted light, so that even when the recorded holographic interference pattern is changed, the holographic interference pattern recording apparatus and a recording method using the same that can easily change the arrangement are provided.

[0008] However, the problem to be solved by the present invention is not limited to the above-described problem, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

Means for Solving the Problem

[0009] One embodiment of the present invention includes a step of irradiating a photosensitive material sample on which a first holographic interference pattern is recorded with reproduction light from a predetermined position to confirm the optical paths formed by the path of the reproduction light and the path of the diffracted light; a step of rotating the photosensitive material sample to arrange the optical paths in a two-dimensional coordinate system; a step of deriving the paths of the reference light and the object light so that a second holographic interference pattern that realizes the same optical paths as the optical paths arranged in the two-dimensional coordinate system can be recorded; and a step of recording the second holographic interference pattern by providing a photosensitive material on which the second holographic interference pattern is to be recorded and irradiating the reference light and the object light at predetermined positions on the paths of the reference light and the object light, respectively. A recording method of a holographic interference pattern is provided.

[0010] One embodiment of the present invention provides a holographic interference pattern recording apparatus including a photosensitive material fixing unit that fixes a photosensitive material on which a second holographic interference pattern is recorded, the second holographic interference pattern realizing the same optical path as the optical path realized by a first holographic interference pattern recorded on the photosensitive material sample; a reference light irradiation unit that irradiates the photosensitive material with reference light; an object light irradiation unit that irradiates the photosensitive material with object light; a stage unit on which the photosensitive material fixing unit, the reference light irradiation unit, and the object light irradiation unit are arranged and fixed at predetermined positions; and a calculation unit that derives the predetermined positions, and records a second holographic interference pattern formed by an interference phenomenon between the reference light and the object light on the photosensitive material.

Effects of the Invention

[0011] In a holographic interference pattern recording method according to an embodiment of the present invention, even when the holographic interference pattern to be recorded, that is, the arrangement of the object light and the reference light in the optical path to be realized, is two-dimensionally converted to change the holographic interference pattern, the positions of the reference light, the object light, and the photosensitive material can be easily changed.

[0012] In a holographic interference pattern recording apparatus according to an embodiment of the present invention, even when the holographic interference pattern to be recorded, that is, the optical path to be realized, is changed, the positions of the reference light, the object light, and the photosensitive material can be easily changed to simplify the recording process.

[0013] The effects of the present invention are not limited to the above-described effects, and effects not mentioned will be clearly understood by those skilled in the art from the present specification and the attached drawings.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0015] The present invention will become clear by referring to the embodiments described in detail later together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below, and can be realized in various different forms. Merely, these embodiments are provided so that the disclosure of the present invention is complete, and to fully inform those with ordinary knowledge in the technical field to which the present invention pertains of the scope of the invention. The present invention is defined only by the scope of the claims. Also, the terms used in the present specification are for explaining the embodiments and do not limit the present invention.

[0016] Throughout the present specification, the singular form includes the plural form as well, unless otherwise specifically stated in the text.

[0017] Throughout the present specification, "including", "comprising", "having" do not exclude the presence or addition of one or more other components, steps, operations and / or elements, and this means that other components can be further included, rather than excluding other components, unless otherwise stated to the contrary.

[0018] Throughout the present specification, when a member is said to be "on" another member, this includes not only the case where a member is in contact with another member, but also the case where there is still another member between the two members.

[0019] Throughout the present specification, "A and / or B" means "A and B" or "A or B".

[0020] Throughout this specification, the "holographic interference pattern" means a holographic interference pattern in which high refractive index portions and low refractive index portions are alternately arranged along a predetermined direction, and the light reaching the holographic optical element is diffracted and the optical path is changed. Such a holographic interference pattern is recorded by interfering a plurality of lasers on a photosensitive material such as a photopolymer. The holographic optical element is understood as a structure arranged on one or the other surface of the optical waveguide to diffract light on the optical waveguide and change the optical path.

[0021] Throughout this specification, the term "longitudinal direction of the holographic interference pattern" is defined as the direction perpendicular to the direction in which the high refractive index portions and the low refractive index portions are alternately arranged.

[0022] Throughout this specification, "recording" may include recording the holographic interference pattern recorded on the photosensitive material sample on the photosensitive material for replication.

[0023] Throughout this specification, "optical path" may mean the optical path formed by the reproduced light and the diffracted light diffracted by the holographic interference pattern when the reproduced light is irradiated on the optical element on which the holographic interference pattern is recorded.

[0024] Hereinafter, the present invention will be described in more detail.

[0025] One embodiment of the present invention includes a step of irradiating a photosensitive material sample on which a first holographic interference pattern is recorded with reproduction light from a predetermined position to confirm the optical path formed by the path of the reproduction light and the path of the diffracted light; a step of rotating the photosensitive material sample to arrange the optical path in a two-dimensional coordinate system; a step of deriving the path of the reference light and the path of the object light so that a second holographic interference pattern that realizes the same optical path as the optical path arranged in the aforementioned two-dimensional coordinate system can be recorded; and a step of recording the second holographic interference pattern by irradiating a photosensitive material provided with the second holographic interference pattern with the reference light and the object light at predetermined positions on the paths of the reference light and the object light, respectively. A method for recording a holographic interference pattern is provided.

[0026] According to one embodiment of the present invention, the step of arranging in a two-dimensional coordinate system may specify the intersection of the reproduction light and the photosensitive material sample as the origin in the two-dimensional coordinate system.

[0027] According to one embodiment of the present invention, the step of recording the second holographic interference pattern may include aligning the photosensitive material on which the second holographic interference pattern is to be recorded in the same arrangement as the arrangement in which the photosensitive material sample has rotated.

[0028] One embodiment of the present invention includes a photosensitive material fixing unit that fixes a photosensitive material on which a second holographic interference pattern that realizes the same optical path as the optical path realized by the first holographic interference pattern recorded on the photosensitive material sample is recorded; a reference light irradiation unit that irradiates the photosensitive material with reference light; an object light irradiation unit that irradiates the photosensitive material with object light; a stage unit on which the photosensitive material fixing unit, the reference light irradiation unit, and the object light irradiation unit are arranged and fixed at predetermined positions; and a calculation unit that derives the predetermined positions, and provides a holographic interference pattern recording apparatus that records the second holographic interference pattern formed by the interference phenomenon of the reference light and the object light on the photosensitive material.

[0029] According to an embodiment of the present invention, the arithmetic unit irradiates a photosensitive material sample on which a first holographic interference pattern is recorded with reproduction light from a predetermined position, and confirms an optical path formed by the path of the reproduction light and the path of the diffracted light. A step of rotating the photosensitive material sample to arrange the optical path in a two-dimensional coordinate system, and a step of deriving the path of the reference light and the path of the object light so that a second holographic interference pattern that realizes the same second optical path as the optical path arranged in the two-dimensional coordinate system can be recorded. A holographic interference pattern recording apparatus that performs the above steps to derive a predetermined position is provided.

[0030] According to an embodiment of the present invention, the photosensitive material fixing unit may rotate the photosensitive material so that the photosensitive material is aligned in the same arrangement as the arrangement in which the photosensitive material sample has rotated.

[0031] According to an embodiment of the present invention, it may further include a control unit connected to each of the photosensitive material fixing unit, the reference light irradiation unit, and the object light irradiation unit, and configured to move each to be arranged at a predetermined position.

[0032] According to an embodiment of the present invention, the stage unit may further include a marker unit on which the paths of the reproduction light and the diffracted light are respectively displayed.

[0033] Example FIG. 1 is a flowchart of a method for recording a holographic interference pattern according to an embodiment of the present invention. Referring to FIG. 1, an embodiment of the present invention includes: a step S10 of irradiating a photosensitive material sample 1 on which a first holographic interference pattern is recorded with reproduction light 3 from a predetermined position to confirm an optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5; a step S30 of rotating the photosensitive material sample 1 to arrange the optical path in a two-dimensional coordinate system; a step S50 of deriving the path of the reference light 30 and the path of the object light 50 so as to be able to record a second holographic interference pattern that realizes the same optical path as the optical paths 3', 5' arranged in the two-dimensional coordinate system; and a step S70 of recording a second holographic interference pattern by irradiating a photosensitive material 10 on which the second holographic interference pattern is to be recorded with the reference light 30 and the object light 50 provided at predetermined positions on the paths of the reference light 30 and the object light 50, respectively. A method for recording a holographic interference pattern is provided.

[0034] The method for recording a holographic interference pattern according to an embodiment of the present invention can easily change the positions of the reference light 30, the object light 50, and the photosensitive material 10 even when the holographic interference pattern is changed by two-dimensionally converting the arrangement of the object light 50 and the reference light 30 in the optical path to be realized, that is, the holographic interference pattern to be recorded.

[0035] FIG. 2 is a schematic diagram of a method for recording a holographic interference pattern according to an embodiment of the present invention. The method for recording a holographic interference pattern will be specifically described with reference to FIG. 2.

[0036] According to an embodiment of the present invention, a method for recording a holographic interference pattern includes a step S10 of irradiating a photosensitive material sample 1 on which a first holographic interference pattern is recorded with reproduction light 3 from a predetermined position 3s to confirm an optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5. Specifically, the reproduction light 3 is arranged at a starting point 3s of the reproduction light, which is a predetermined position, and the photosensitive material sample 1 is irradiated, and the path of the reproduction light 3 and the path of the diffracted light 5 diffracted by the first holographic interference pattern recorded on the photosensitive material sample 1 are confirmed. As described above, by including the step S10 of irradiating the photosensitive material sample 1 on which the first holographic interference pattern is recorded with the reproduction light 3 from a predetermined position to confirm the optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5, in order to record the second holographic interference pattern, the paths of the corresponding object light 50 and the reference light 30 can be confirmed, and thereby, the starting point 50s of the object light and the starting point 30s of the reference light can be confirmed.

[0037] According to an embodiment of the present invention, the photosensitive material sample 1 on which the first holographic interference pattern is recorded may be a photosensitive material sample having a curved surface shape or a planar shape. Specifically, when the shapes of the photosensitive material samples are different, even when the photosensitive material samples on which the same first holographic interference pattern is recorded are irradiated with the reproduction light 3 from the same position, the paths of the diffracted light 5 are realized differently. Therefore, when recording the second holographic interference pattern that realizes the same optical path as the above-described optical path, it is preferable to clearly specify the shape of the photosensitive material sample 1 on which the first holographic interference pattern is recorded and then confirm the optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5. As described above, by using the photosensitive material sample 1 on which the first holographic interference pattern is recorded as a photosensitive material sample having a curved surface shape or a planar shape, the paths of the reference light 30 and the object light 50 irradiated for recording the holographic interference pattern can be accurately derived.

[0038] Throughout this specification, the "curved surface shape" may mean that both sides including one side of the photosensitive material or the other side opposite to one side of the photosensitive material have surfaces that are not flat but curved.

[0039] Throughout this specification, the "plane shape" may mean a part of a flat and infinitely extending surface that includes one side of the photosensitive material and the other side opposite to this side.

[0040] According to an embodiment of the present invention, the photosensitive material on which the second holographic interference pattern is recorded may be a photosensitive material having a curved surface shape or a plane shape. That is, the photosensitive material on which the second holographic interference pattern realizing the same optical path as the above-described optical path is recorded may be a photosensitive material having a curved surface shape or a plane shape. Specifically, depending on the device to which the photosensitive material is applied, it may be necessary for the photosensitive material to have a curved surface shape or a plane shape. Therefore, depending on the device to which the photosensitive material on which the second holographic interference pattern is recorded is applied, it is preferable to select the shape of the photosensitive material on which the second holographic interference pattern is recorded. As described above, by realizing the shape of the photosensitive material on which the second holographic interference pattern is recorded in a curved surface shape or a plane shape, the devices to be applied can be variously expanded.

[0041] According to an embodiment of the present invention, when the photosensitive material sample on which the first holographic interference pattern is recorded has a curved surface shape, the photosensitive material on which the second holographic interference pattern is recorded may have a curved surface shape. When the photosensitive material sample on which the first holographic interference pattern is recorded has a planar shape, the photosensitive material on which the second holographic interference pattern is recorded may have a planar shape. As described above, by realizing the shape of the photosensitive material sample on which the first holographic interference pattern is recorded and the shape of the photosensitive material on which the second holographic interference pattern is recorded as the same shape, the optical path realized by the first holographic interference pattern in this photosensitive material sample can be realized also in the photosensitive material on which the second holographic interference pattern is recorded, and it becomes easy to record the second holographic interference pattern.

[0042] According to an embodiment of the present invention, when the photosensitive material sample on which the first holographic interference pattern is recorded has a curved surface shape, the photosensitive material on which the second holographic interference pattern is recorded may have a planar shape. As described above, when the photosensitive material sample on which the first holographic interference pattern is recorded has a curved surface shape, by making the shape of the photosensitive material on which the second holographic interference pattern is recorded a planar shape, even when the planar photosensitive material is irradiated with the reproduction light, the diffracted light diffracted by the curved surface photosensitive material can be realized.

[0043] According to an embodiment of the present invention, when the photosensitive material sample on which the first holographic interference pattern is recorded has a planar shape, the photosensitive material on which the second holographic interference pattern is recorded may have a curved surface shape. As described above, when the photosensitive material sample on which the first holographic interference pattern is recorded has a planar shape, by making the shape of the photosensitive material on which the second holographic interference pattern is recorded a curved surface shape, even when the curved surface photosensitive material is irradiated with the reproduction light, the diffracted light diffracted by the planar photosensitive material can be realized.

[0044] According to an embodiment of the present invention, a method for recording a holographic interference pattern includes step S30 of rotating a photosensitive material sample 1 to arrange optical paths 3' and 5' in a two-dimensional coordinate system. That is, the method for recording a holographic interference pattern includes step S30 of rotating a photosensitive material sample 1 to arrange the path of the playback light 3' and the path of the diffracted light 5' in a two-dimensional coordinate system. Specifically, the path of the playback light 3 and the path of the diffracted light 5 form an origin O which is the intersection with the photosensitive material sample 1, and step S30 includes arranging the plane formed by the origin O, the path of the playback light 3, and the path of the diffracted light 5 on a plane which is a two-dimensional coordinate system. As described above, by including step S30 of rotating the photosensitive material sample 1 to arrange the optical paths 3' and 5' in a two-dimensional coordinate system, the paths of the playback light 3 and the diffracted light 5 arranged in a space which is a three-dimensional coordinate system can be simplified.

[0045] According to an embodiment of the present invention, a method for recording a holographic interference pattern includes step S50 of deriving the path of the reference light 30 and the path of the object light 50 so that a second holographic interference pattern that realizes the same optical paths as the optical paths 3' and 5' arranged in a two-dimensional coordinate system can be recorded. Specifically, when trying to derive the path of the reference light 30 and the path of the object light 50 from the optical path formed by the path of the playback light 3 and the diffracted light 5 in a space which is a three-dimensional coordinate system, there is a problem that the alignment of each arrangement becomes complicated. Therefore, step S50 includes irradiating the playback light 3' arranged in a two-dimensional coordinate system, checking the diffracted light 5' that is diffracted, and deriving each of the path of the reference light 30 and the path of the object light 50 so that a second holographic interference pattern can be recorded corresponding to this. As described above, by including step S50 of deriving the path of the reference light 30 and the path of the object light 50 from the paths of the playback light 3' and the diffracted light 5' arranged in a two-dimensional coordinate system so that a second holographic interference pattern can be recorded, even when the first holographic interference pattern is changed, the paths of the reference light 30 and the object light 50 can be easily changed by the above-described derivation process.

[0046] According to an embodiment of the present invention, a method for recording a holographic interference pattern includes a step S70 of recording a second holographic interference pattern by irradiating a photosensitive material 10 on which the second holographic interference pattern is to be recorded with a reference light 30 and an object light 50 at predetermined positions 30s and 50s in the paths of the reference light 30 and the object light 50, respectively. Specifically, the second holographic interference pattern may be a pattern in which an interference pattern formed by an interference phenomenon generated by irradiating the reference light 30 and the object light 50 is recorded. Specifically, the photosensitive material is irradiated with the reference light and the object light, and destructive interference and constructive interference occur due to the interference phenomenon of the reference light and the object light. In a portion where constructive interference occurs in the photosensitive material, stronger photopolymerization occurs, and in a portion where destructive interference occurs, photopolymerization occurs weaker than in the portion where constructive interference occurs in the photosensitive material, thereby generating a density difference in the photosensitive material. The photosensitive material in which the density difference has occurred forms a pattern realized by the interference phenomenon, and such a pattern corresponds to the holographic interference pattern. As described above, by providing the photosensitive material 10 on which the second holographic interference pattern is recorded and irradiating the reference light 30 and the object light 50 at predetermined positions in the paths of the reference light 30 and the object light 50, respectively, the second holographic interference pattern can be recorded, and the holographic interference pattern can be easily formed.

[0047] According to an embodiment of the present invention, the step S30 of arranging in the two-dimensional coordinate system may be to specify the intersection of the reproduction light 3' and the photosensitive material sample 1' as the origin O in the two-dimensional coordinate system. Specifically, the position where the reproduction light 3 is irradiated and intersects with the photosensitive material sample 1 and is diffracted can be specified as the origin O, and the origin O can be used as the origin of the two-dimensional coordinate system. As described above, by specifying the intersection of the reproduction light 3' and the photosensitive material sample 1' as the origin O in the two-dimensional coordinate system and arranging it in the two-dimensional coordinate system, the arrangement of the reference light 30, the object light 50, and the photosensitive material 10 is simplified, so that even when the holographic interference pattern is changed, the arrangement of each component can be easily changed.

[0048] According to an embodiment of the present invention, the step S70 of recording the second holographic interference pattern may include aligning a photosensitive material 10' on which the second holographic interference pattern is to be recorded in the same arrangement as the rotated arrangement 1' of the photosensitive material sample 1. Specifically, when changing the arrangement of each component from a three-dimensional coordinate system to a two-dimensional coordinate system and attempting to record a holographic interference pattern with the reference light 30 and the object light 50, the rotated photosensitive material 10' is arranged so as to be in the same arrangement as the rotated arrangement of the photosensitive material sample 1', and the second holographic interference pattern can be recorded.

[0049] An embodiment of the present invention includes a photosensitive material fixing unit 100 that fixes a photosensitive material 10' on which a second holographic interference pattern that realizes the same optical path as the optical path realized by the first holographic interference pattern recorded on the photosensitive material sample 1 is recorded, a reference light irradiation unit 300 that irradiates the photosensitive material 10' with the reference light 30, an object light irradiation unit 500 that irradiates the photosensitive material 10' with the object light 50, a stage unit 700 on which the photosensitive material fixing unit 100, the reference light irradiation unit 300, and the object light irradiation unit 500 are arranged and fixed at predetermined positions, and a calculation unit 600 that derives the predetermined positions, and provides a holographic interference pattern recording apparatus 1000 that records a second holographic interference pattern formed by an interference phenomenon between the reference light 30 and the object light 50 on the photosensitive material 10'.

[0050] The holographic interference pattern recording apparatus 1000 according to an embodiment of the present invention can simplify the recording process by easily changing the positions of the reference light 30, the object light 50, and the photosensitive material 10' even when changing the holographic interference pattern to be recorded.

[0051] FIG. 3 is a plan view of a holographic interference pattern recording apparatus 1000 according to an embodiment of the present invention. FIG. 4 is a perspective view of a holographic interference pattern recording apparatus 1000 according to an embodiment of the present invention. The holographic interference pattern recording apparatus 1000 will be described with reference to FIGS. 3 and 4.

[0052] According to an embodiment of the present invention, a holographic interference pattern recording apparatus 1000 includes a photosensitive material fixing unit 100 that fixes a photosensitive material 10' on which a second holographic interference pattern is recorded, the second holographic interference pattern realizing the same optical path as the optical path realized by the first holographic interference pattern recorded on the photosensitive material sample. Specifically, in order to record a second holographic interference pattern that realizes the same optical path as the optical path formed by the path of the reproduced light and the path of the diffracted light realized by the first holographic interference pattern recorded on the photosensitive material sample 1, the photosensitive material 10' is fixed to the photosensitive material fixing unit 100. As described above, by providing the photosensitive material fixing unit 100 that fixes the photosensitive material 10' on which the second holographic interference pattern is recorded, realizing the same optical path as the optical path realized by the first holographic interference pattern, the arrangement of the photosensitive material fixing unit 100 can be easily changed, and the second holographic interference pattern can be clearly recorded while minimizing the movement of the photosensitive material 10'.

[0053] According to an embodiment of the present invention, a holographic interference pattern recording apparatus 1000 includes a reference light irradiation unit 300 that irradiates the photosensitive material 10' with reference light 30. Specifically, it includes a light source that irradiates the reference light 30, that is, the reference light irradiation unit 300, and by irradiating the photosensitive material 10', it can cause interference with the object light 50 to form a second holographic interference pattern. Also, the position where the reference light 30 is irradiated can be easily changed. As described above, by providing the reference light irradiation unit 300 that irradiates the photosensitive material 10' with the reference light 30, the position where the reference light 30 is irradiated can be easily changed, and the second holographic interference pattern can be clearly recorded while minimizing the movement of the reference light irradiation unit 300.

[0054] According to an embodiment of the present invention, a holographic interference pattern recording apparatus 1000 includes an object light irradiating unit 500 that irradiates object light 50 onto a photosensitive material 10'. Specifically, it includes a light source for irradiating the object light 50, that is, the object light irradiating unit 500. By irradiating the photosensitive material 10', it can cause interference with the reference light 30 to form a second holographic interference pattern. Also, the position where the object light 50 is irradiated can be easily changed. As described above, by including the object light irradiating unit 500 that irradiates the object light 50 onto the photosensitive material 10', the position where the object light 50 is irradiated can be easily changed, and the second holographic interference pattern can be clearly recorded while minimizing the movement of the object light irradiating unit 500.

[0055] According to an embodiment of the present invention, a holographic interference pattern recording apparatus 1000 includes a stage unit 700 on which a photosensitive material fixing unit 100, a reference light irradiating unit 300, and an object light irradiating unit 500 are arranged and fixed at predetermined positions. Specifically, the photosensitive material fixing unit 100, the reference light irradiating unit 300, and the object light irradiating unit 500 can be aligned and fixed according to their respective arrangements derived in the above-described derivation step, and the positions of the respective components derived in the two-dimensional coordinate system in the plane of the stage unit 700 can be easily adjusted. Also, the stage unit 700 can easily arrange the positions of the photosensitive material fixing unit 100, the reference light irradiating unit 300, and the object light irradiating unit 500 according to the second holographic interference pattern to be recorded while interlocking with a control unit 800 described later. As described above, by including the stage unit 700 on which the photosensitive material fixing unit 100, the reference light irradiating unit 300, and the object light irradiating unit 500 are arranged and fixed at predetermined positions, the respective components can be easily arranged according to the second holographic interference pattern to be recorded.

[0056] According to an embodiment of the present invention, a holographic interference pattern recording apparatus includes an arithmetic unit 600 that derives the above-described predetermined positions. Specifically, the arithmetic unit 600 can derive the path of the reference light 30 and the path of the object light 50 capable of recording a holographic interference pattern in which the reproduction light 3 is irradiated onto the photosensitive material sample 1 and the diffracted light 5 is diffracted, and derive the path of the reference light 30 and the path of the object light 50 on the two-dimensional coordinate system corresponding to the reproduction light 3 and the diffracted light 5 in the three-dimensional coordinate system. As described above, by providing the arithmetic unit 600 that derives the predetermined positions, the arrangement of the reproduction light 3 and the diffracted light 5 located in the space that is the three-dimensional coordinate system can be easily converted into a plane that is the two-dimensional coordinate system, and the path of the converted reproduction light 3' and the path of the diffracted light 5' can be converted into the path of the corresponding reference light 30 and the path of the object light 50.

[0057] According to an embodiment of the present invention, a holographic interference pattern recording apparatus 1000 records and duplicates a second holographic interference pattern formed by the interference phenomenon of the reference light 30 and the object light 50 on a photosensitive material. Specifically, the photosensitive material is irradiated with the reference light and the object light, and destructive interference and constructive interference occur due to the interference phenomenon of the reference light and the object light. As a result, stronger photopolymerization occurs at the portions where constructive interference occurs in the photosensitive material, and weaker photopolymerization occurs at the portions where destructive interference occurs than at the portions where constructive interference occurs, thereby generating a density difference in the photosensitive material. The photosensitive material in which the density difference has occurred forms a pattern realized by the interference phenomenon, and such a pattern corresponds to a holographic interference pattern. As described above, by providing a photosensitive material on which a holographic interference pattern is recorded, and irradiating the reference light and the object light at predetermined positions on the paths of the reference light and the object light respectively, the second holographic interference pattern can be recorded, and thus the holographic interference pattern can be easily formed.

[0058] According to an embodiment of the present invention, the arithmetic unit 600 irradiates the photosensitive material sample 1 on which the first holographic interference pattern is recorded with the reproduction light 3 from a predetermined position 3s to confirm the optical path formed by the optical path of the reproduction light 3 and the optical path of the diffracted light 5 in step S10; rotates the photosensitive material sample 1 to arrange the optical paths 3' and 5' in a two-dimensional coordinate system in step S30; and derives the optical path of the reference light 30 and the optical path of the object light 50 so that the second holographic interference pattern realizing the same optical path as the optical paths 3' and 5' arranged in the two-dimensional coordinate system can be recorded in step S50, and may derive a predetermined position. As described above, by including step S10 of confirming the optical path, step S30 of arranging in a two-dimensional coordinate system, and step S50 of deriving the optical path of the reference light and the optical path of the object light, the optical path of the reference light 30 and the optical path of the object light 50 converted into the two-dimensional coordinate system can be easily derived, and even when the holographic interference pattern to be recorded is changed, the optical path of the reference light 30 and the optical path of the object light 50 can be easily derived.

[0059] According to an embodiment of the present invention, the calculation unit 600 includes a step S10 of irradiating the photosensitive material sample 1 on which the first holographic interference pattern is recorded with the reproduction light 3 from a predetermined position 3s to confirm the optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5. That is, it includes a step of irradiating the photosensitive material sample 1 on which the holographic interference pattern is recorded with the reproduction light 3 from a predetermined position 3s to confirm the path of the diffracted light 5. Specifically, the reproduction light 3 is arranged at the starting point 3s of the reproduction light, which is a predetermined position, and the photosensitive material sample 1 is irradiated, and the path of the diffracted light 5 diffracted by the holographic interference pattern recorded on the photosensitive material sample 1 is confirmed. As described above, by including the step S10 of irradiating the photosensitive material sample 1 on which the first holographic interference pattern is recorded with the reproduction light 3 from a predetermined position 3s to confirm the optical path formed by the path of the reproduction light 3 and the path of the diffracted light 5, the paths of the corresponding object light 50 and the reference light 30 necessary for recording the holographic interference pattern can be confirmed, and thereby, the starting point 50s of the object light and the starting point 30s of the reference light can be confirmed.

[0060] According to an embodiment of the present invention, the calculation unit 600 includes a step S30 of rotating the photosensitive material sample 1 to arrange the optical paths 3', 5' in a two-dimensional coordinate system. That is, the calculation unit 600 includes a step S30 of rotating the photosensitive material sample 1 to arrange the path of the reproduction light 3 and the path of the diffracted light 5 in a two-dimensional coordinate system. Specifically, the path of the reproduction light 3 and the path of the diffracted light 5 form an origin O, which is the intersection point with the photosensitive material sample 1, and the step S30 of arranging the plane formed by the origin O, the path of the reproduction light 3', and the path of the diffracted light 5' on the plane, which is a two-dimensional coordinate system, is included. As described above, by including the step S30 of rotating the photosensitive material sample 1' to arrange the optical path formed by the path of the reproduction light 3' and the diffracted light 5' in a two-dimensional coordinate system, the paths of the reproduction light 3 and the diffracted light 5 arranged in the space, which is a three-dimensional coordinate system, can be simplified.

[0061] According to an embodiment of the present invention, the arithmetic unit 600 includes step S50 of deriving the path of the reference light 30 and the path of the object light 50 so as to record a second holographic interference pattern that realizes the same optical paths as the optical paths 3' and 5' arranged in the two-dimensional coordinate system. The arithmetic unit 600 includes step S50 of deriving the path of the reference light 30 and the path of the object light 50 so as to record a second holographic interference pattern that realizes the same optical paths as the optical paths 3' and 5' arranged in the two-dimensional coordinate system. Specifically, when deriving the path of the reference light and the path of the object light from the path of the reproduction light 3 and the path of the diffracted light 5 in a three-dimensional coordinate system space, there is a problem that the alignment of each arrangement becomes complicated. Therefore, step S50 of irradiating the reproduction light 3' arranged in the two-dimensional coordinate system, checking the diffracted light 5' diffracted thereby, and deriving each of the path of the reference light 30 and the path of the object light 50 so as to record the corresponding second holographic interference pattern is included. As described above, by including step S50 of deriving the path of the reference light 30 and the path of the object light 50 so as to record the second holographic interference pattern from the path of the reproduction light 3' and the path of the diffracted light 5' arranged in the two-dimensional coordinate system, even when the first holographic interference pattern is changed, the path of the reference light 30 and the path of the object light 50 can be easily changed by the above-described derivation process.

[0062] According to an embodiment of the present invention, the photosensitive material fixing unit 100 may rotate and align the photosensitive material 10' in the same arrangement as the arrangement in which the photosensitive material sample 1' rotates. Specifically, when the photosensitive material sample 1' rotates so that the reproduction light 3 and the diffracted light 5 are arranged in the two-dimensional coordinate system, the photosensitive material 10' is rotated and aligned so as to be in the same arrangement, thereby recording the second holographic interference pattern to be recorded or replicated and realizing the diffracted light 5' diffracted at a specific angle by the irradiation of the predetermined reproduction light 3'.

[0063] According to an embodiment of the present invention, it may further include a control unit 800 connected to each of the photosensitive material fixing unit 100, the reference light irradiation unit 300, and the object light irradiation unit 500 and configured to move them so that each is disposed at a predetermined position. Specifically, when the holographic interference pattern to be recorded is changed, the control unit 800 can move the reference light irradiation unit 300 and the object light irradiation unit 500 to be located on the path of the reference light 30 and the path of the object light 50 derived by the arithmetic unit 600, and the photosensitive material fixing unit 100 can also be moved by the control unit 800 so that the origin O can be located at the origin of the two-dimensional coordinate system. As described above, by controlling the positions of the photosensitive material fixing unit 100, the reference light irradiation unit 300, and the object light irradiation unit 500 by the control unit 800, accurate alignment can be realized and the accuracy of the holographic interference pattern to be recorded can be improved.

[0064] According to an embodiment of the present invention, the stage unit 700 may further include a marker unit 900 on which the paths of the reproduced light 3' and the diffracted light 5' are respectively displayed. As described above, by further providing the stage unit 700 with the paths of the reproduced light 3' and the diffracted light 5', that is, the marker unit 900 on which the optical paths are displayed, the relationship between the path of the reference light 30 and the path of the object light 50 and the paths of the reproduced light 3' and the diffracted light 5' can be confirmed, and thereby the relationship between the respective paths can be grasped and the holographic interference pattern to be recorded or replicated can be accurately realized.

[0065] As described above, the present invention has been described by way of limited examples, but the present invention is not limited thereby, and it is understood that various modifications and variations are possible within the technical idea of the present invention and the equivalent scope of the claims described below by those having ordinary knowledge in the technical field to which the present invention pertains.

Explanation of Reference Numerals

[0066] 1: Photosensitive material sample 1’: Rotated photosensitive material sample 3: Reconstructed light 3’: Reconstructed light arranged in a two-dimensional coordinate system 3s: Starting point of the reconstructed light 5: Diffracted light 5’: Diffracted light arranged in a two-dimensional coordinate system 5t: End point of the diffracted light θ: Angle between the reference light and the object light Ф: Angle between the reconstructed light and the diffracted light O: Origin 10: Photosensitive material 10’: Rotated photosensitive material 30: Reference light 30s: Starting point of the reference light 50: Object light 50s: Starting point of the object light 50t: End point of the object light 100: Photosensitive material fixing part 300: Reference light irradiation part 500: Object light irradiation part 600: Calculation part 700: Stage part 800: Control part 900: Marker part 1000: Recording device for holographic interference pattern

Claims

Step of irradiating a photosensitive material sample on which a first holographic interference pattern as a replication source is recorded with reproduction light from a predetermined position to confirm an optical path formed by the path of the reproduction light and the path of the diffracted light; Step of rotating the photosensitive material sample to arrange the optical path in a two-dimensional coordinate system; Step of deriving the path of the reference light and the path of the object light so that a second holographic interference pattern that realizes the same optical path as the optical path arranged in the two-dimensional coordinate system can be recorded; Including a step of recording the second holographic interference pattern by irradiating a photosensitive material provided with the second holographic interference pattern with reference light and object light at predetermined positions on the path of the reference light and the path of the object light respectively; The step of arranging in the two-dimensional coordinate system includes designating, as the origin, the intersection of the reproduction light and the photosensitive material sample in the two-dimensional coordinate system, and arranging, on the plane of the two-dimensional coordinate system, the plane formed by the origin, the path of the reproduction light, and the path of the diffracted light; The step of recording the second holographic interference pattern; A method for replicating a holographic interference pattern, comprising aligning a photosensitive material on which the second holographic interference pattern is recorded in the same arrangement as the arrangement in which the photosensitive material sample is rotated. A photosensitive material fixing unit for fixing a photosensitive material on which a second holographic interference pattern that realizes the same optical path as the optical path realized by the first holographic interference pattern recorded on the photosensitive material sample as the replication source is recorded; A reference light irradiation unit for irradiating the photosensitive material with reference light; An object light irradiation unit for irradiating the photosensitive material with object light; A stage unit on which the photosensitive material fixing unit, the reference light irradiation unit, and the object light irradiation unit are arranged and fixed at predetermined positions; An arithmetic unit for deriving the predetermined positions; Recording the second holographic interference pattern formed by the interference phenomenon of the reference light and the object light on the photosensitive material; The arithmetic unit; Step of irradiating a photosensitive material sample on which the first holographic interference pattern is recorded with reproduction light from a predetermined position to confirm an optical path formed by the path of the reproduction light and the path of the diffracted light; Step of rotating the photosensitive material sample to arrange the optical path in a two-dimensional coordinate system; Deriving a reference light path and an object light path so as to be able to record a second holographic interference pattern that realizes the same light path as the light path arranged in the two-dimensional coordinate system, and deriving the predetermined position by performing this step, In the two-dimensional coordinate system, designating the intersection point of the reproduction light and the photosensitive material sample as the origin, and arranging the plane formed by the origin, the path of the reproduction light, and the path of the diffracted light on the plane that is the two-dimensional coordinate system, The photosensitive material fixing unit is a holographic interference pattern replication device characterized by rotating the photosensitive material so that the photosensitive material is aligned in the same arrangement as the arrangement in which the photosensitive material sample is rotated. **Claim 3** The holographic interference pattern replication device according to claim 2, further comprising a control unit connected to each of the photosensitive material fixing unit, the reference light irradiation unit, and the object light irradiation unit and moved to be arranged at the respective predetermined positions. **Claim 4** The holographic interference pattern replication device according to claim 2, wherein the stage unit further includes a marker unit on which the paths of the reproduction light and the diffracted light are respectively displayed.

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