KR20160066942A - Apparatus and method for manufacturing Holographic Optical Element - Google Patents
Apparatus and method for manufacturing Holographic Optical Element Download PDFInfo
- Publication number
- KR20160066942A KR20160066942A KR1020140172385A KR20140172385A KR20160066942A KR 20160066942 A KR20160066942 A KR 20160066942A KR 1020140172385 A KR1020140172385 A KR 1020140172385A KR 20140172385 A KR20140172385 A KR 20140172385A KR 20160066942 A KR20160066942 A KR 20160066942A
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- optical element
- lens array
- reference beam
- recording medium
- holographic optical
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- 230000003287 optical effect Effects 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 230000001678 irradiating effect Effects 0.000 claims abstract description 20
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- 230000005855 radiation Effects 0.000 abstract 2
- 230000006870 function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000003190 augmentative effect Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
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- 229910052709 silver Inorganic materials 0.000 description 2
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- 230000015556 catabolic process Effects 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S359/00—Optical: systems and elements
- Y10S359/90—Methods
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stereoscopic And Panoramic Photography (AREA)
- Holo Graphy (AREA)
Abstract
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present disclosure relates to a method and apparatus for manufacturing a holographic optical element and, more particularly, to a method of recording the optical characteristics of a lens array including a plurality of elemental lenses in a holographic optical element And apparatus.
Recently, there has been a great demand for a three-dimensional image display device capable of realizing images more effectively and effectively in various fields such as movies, games, advertisements, medical images, education, and military. Accordingly, various techniques for displaying three-dimensional images have been proposed, and various types of three-dimensional image display devices have already been commercialized.
For example, the three-dimensional image display device includes a spectacle method and a non-spectacle method. In the stereoscopic method, there are a lenticular method using a plurality of cylindrical lens arrays and a parallax barrier method having a plurality of openings and openings. have.
A hologram method and an integrated image method have been proposed as a three-dimensional image display method in which the depth perception recognized by the brain matches the focal point of the eye and can provide full parallax.
A hologram is a medium on which a light wave is recorded, and stores intensity and phase information of the light wave. While ordinary photographs only record intensity information, holograms store both intensity and phase, enabling three-dimensional reconstruction of visual information. For the recording of the hologram, two beams including a signal beam having a coherence and a reference beam are required. The signal beam is a beam that can be modulated from the object to be recorded. The intensity or phase information of the interference fringe between the signal beam and the reference beam can be recorded in the hologram recording medium to record the intensity and phase information of the modulated signal beam. When a beam having the same optical characteristic as the reference beam used for recording is incident on the recorded hologram, the signal beam stored in the hologram can be reproduced.
The integral imaging technique is a method of non-spectacular three-dimensional display, which provides both vertical and horizontal parallax using a lens-array to provide three-dimensional images to viewers without special glasses There is a way. Each element lens constituting the lens array can display a three-dimensional virtual image before or after the integrated image display by adjusting the optical information distribution of the specially produced element image. The lens array can be used as a lens assembly having a two-dimensional periodic arrangement, in addition to an integrated image, a two-dimensional image screen, a light distribution control, and the like.
According to these embodiments, a holographic optical element in which the optical characteristics of a lens array including a plurality of element lenses are recorded is generated, and a method and an apparatus for manufacturing a holographic optical element for displaying a two-dimensional or three-dimensional image to provide.
An apparatus for manufacturing a holographic optical element according to a first aspect includes: a light irradiation unit; A beam splitter for separating the laser beam from the light irradiating unit into a signal beam and a reference beam; A reference beam optical system for irradiating the reference beam to a holographic material; A lens array including a plurality of elemental lenses; And a signal beam optical system for irradiating the signal beam to the lens array, and an interference pattern of the signal beam modulated through the reference beam and the lens array can be recorded in the hologram recording medium.
Further, an apparatus for manufacturing a holographic optical element includes a plurality of light sources emitting laser beams of different wavelengths; A plurality of mirrors for superposing laser beams of different wavelengths into a beam having one path; A shutter for determining an exposure time of the superimposed beam; And a beam expander for expanding the width of the superimposed beam.
The reference beam optical system further includes: a first mirror for reflecting the reference beam such that the reference beam is irradiated at an angle defined by the hologram recording medium; And a first aperture for adjusting an area irradiated with the reference beam onto the hologram recording medium.
The signal beam optical system further includes: a second mirror that reflects the signal beam such that the signal beam is irradiated in a direction perpendicular to the lens array; And a second diaphragm for adjusting an area irradiated with the reference beam to the lens array.
The apparatus for manufacturing a holographic optical element may further include a stage on which the hologram recording medium is disposed and on which a position of an area of the hologram recording medium on which the interference fringe is recorded is changed to change.
Further, the interference fringes may occur when the reference beam and the modulated signal beam cross each other through the opposite surfaces of the hologram recording medium.
According to the second aspect, a holographic optical element can record an interference pattern of a signal beam modulated through a lens array including a reference beam and a plurality of elemental lenses, Dimensional or three-dimensional image can be selectively displayed according to the size of pixels in the image.
When the size of the pixels in the image is smaller than the size of each of the element lenses, the holographic optical element displays a two-dimensional image. If the size of each element lens is larger than twice the size of the pixels in the image, A three-dimensional image can be displayed.
In addition, the holographic optical element can display a two-dimensional or three-dimensional image in full color.
According to a third aspect, a method of manufacturing a holographic optical element includes: emitting a laser beam; Separating the laser beam into a signal beam and a reference beam; Irradiating the reference beam to a holographic material; Irradiating the signal beam to a lens array including a plurality of elemental lenses; And recording interference fringes of the signal beam modulated through the reference beam and the lens array on the hologram recording medium.
Also, a manufacturing method of a holographic optical element includes: emitting laser beams of different wavelengths; Superposing laser beams of different wavelengths into a beam having one path; And expanding the width of the superimposed beam.
Further, the step of irradiating the reference beam includes the steps of: reflecting the reference beam such that the reference beam is irradiated at an angle defined by the hologram recording medium; And adjusting an area irradiated with the reference beam onto the hologram recording medium.
The step of irradiating the signal beam further includes the steps of: reflecting the signal beam such that the signal beam is radiated in a direction perpendicular to the lens array; And adjusting an area where the reference beam is irradiated to the lens array.
Further, the manufacturing method of the holographic optical element may further include: changing the position of the area of the hologram recording medium on which the interference fringes are recorded.
Further, the interference fringes may occur when the reference beam and the modulated signal beam cross each other through the opposite surfaces of the hologram recording medium.
According to embodiments of the present invention, the holographic optical element according to the present disclosure is effective to realize optical see-through augmented reality.
Further, according to embodiments of the present invention, the holographic optical element can selectively display a two-dimensional or three-dimensional image according to the size of a pixel in an image incident on the holographic optical element.
Further, according to embodiments of the present invention, the holographic optical element can display a full-color two-dimensional or three-dimensional image.
The present invention may be readily understood by reference to the following detailed description and the accompanying drawings, in which reference numerals refer to structural elements.
1 is a view for explaining an apparatus for manufacturing a holographic optical element according to the present disclosure.
2 is a diagram for explaining a process of recording an interference pattern of a signal beam modulated through a reference beam and a lens array on a hologram recording medium according to an embodiment.
3 is a view for explaining an apparatus for manufacturing a holographic optical element according to an embodiment.
4 is a diagram for explaining a two-dimensional or three-dimensional display device according to an embodiment.
Fig. 5 is a diagram for explaining contents in which a holographic optical element receives light for displaying an image from the outside and reproduces the image, according to an embodiment. Fig.
6A and 6B are views for explaining contents in which a holographic optical element displays a two-dimensional or three-dimensional image on a space, according to an embodiment.
7 shows an example in which a holographic optical element displays a three-dimensional image, according to one embodiment.
8 shows an example in which a holographic optical element displays a two-dimensional image, according to one embodiment.
9 is a view for explaining a method of manufacturing a holographic optical element, according to an embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are intended to illustrate the invention and are not intended to limit or limit the scope of the invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.
When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In order to clearly explain the present invention in the drawings, parts not related to the description will be omitted.
1 is a view for explaining an
The
The light irradiating
The
The reference beam
The
The signal beam
The signal beam S reflected from the
According to one embodiment, the
1, the
FIG. 2 is a diagram for describing in more detail a process in which an interference fringe of a signal beam modulated through a reference beam and a lens array is recorded on a hologram recording medium, according to an embodiment.
As shown in FIG. 2, the reference beam is irradiated onto the
3 is a view for explaining an
The
The
The plurality of laser
The plurality of
The
The
Shutter 317 may, in accordance with one embodiment, determine the exposure time of the superimposed beam.
The
The
According to one embodiment, the reference beam and the holographic optical element on which the interference fringes of the signal beam modulated through the lens array are recorded may have the same optical characteristics as the lens array. That is, the holographic optical element, according to one embodiment, can function as a diffuser for two-dimensional image reproduction, like a lens array, and can be used for uniform illumination, Can be used for control. The holographic optical element may also function as an optical element for an autostereoscopic three-dimensional image, to display a three-dimensional integrated image, according to one embodiment.
In addition, the
In addition, the holographic optical element according to the present disclosure has a characteristic of a volume hologram, so that it is very excellent in the selectivity of the angle, so that it is possible to have a characteristic that the brightness drop of the external real world image is very small.
Therefore, in the following, contents for displaying a two-dimensional or three-dimensional image through the holographic optical element recorded by the above-described method will be described.
4 is a diagram for explaining a two-dimensional or three-dimensional display device 400 (hereinafter referred to as a device 400) according to an embodiment.
Apparatus 400 may include a
The
The
In addition, the
The holographic
The holographic
FIG. 5 is a diagram for explaining contents in which a holographic
The holographic
The holographic
6A and 6B are views for explaining contents in which a holographic optical element displays a two-dimensional or three-dimensional image on a space, according to an embodiment.
6A and 6B, for convenience of description, a lens array is shown inside the holographic
6A and 6B, the traveling direction of the image projected by the
6A is a diagram for explaining an example in which the holographic optical element 610 displays a two-dimensional image as a two-dimensional image screen.
6A, pixels P 1 , P 2 , P 3 having the same size as the size of each element lens of the lens array are projected onto the holographic optical element 610. Each of the pixels P 1 , P 2 , and P 3 transmits through the holographic optical element 610 and diverges at an angle equal to the numerical aperture of the element lens. Therefore, the observer can observe the two-dimensional image within the diffusion angle.
6B shows each element lens of the lens array which is three times larger than the size of each of the pixels P 1 , P 2 and P 3 . Each of the pixels P 1 , P 2 , and P 3 passes through the holographic
Therefore, the holographic
4, the holographic
In addition, the holographic
Thus, the holographic
7 shows an example in which a holographic optical element displays a three-dimensional image, according to one embodiment.
The
The
8 shows an example in which a holographic optical element displays a two-dimensional image, according to one embodiment.
The
The
9 is a diagram for explaining a method of manufacturing a holographic optical element performed by the
The method shown in FIG. 9 can be performed by each component of the
In step S910, the
According to one embodiment, the
In addition, the
In step S920, the
According to one embodiment, the
In step S930, the
According to one embodiment, the
In addition, the
In addition, the
In step S940, the apparatus 100,300 may illuminate a separate signal beam to a lens array, according to one embodiment. The lens array, according to one embodiment, may be composed of a plurality of elemental lenses. The lens array, according to one embodiment, may be configured in a two-dimensional array and may perform various functions. For example, the lens array can function as a diffuser for two-dimensional image reproduction, can be used for uniform illumination, and can be used for light control. The lens array may also function as an optical element for an autostereoscopic three-dimensional image, to display a three-dimensional integrated image, according to one embodiment.
According to one embodiment, the
In addition, the
In step S950, the
According to one embodiment, the signal beam can be modulated while transmitting through the lens array. The signal beam modulated through the reference beam and the lens array can pass through and cross the different sides of the hologram recording medium to form an interference fringe, and the
In addition, according to one embodiment, the
Accordingly, the
The hologram generating method, apparatus, and holographic three-dimensional image display apparatus according to the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified in various ways, All or some of the embodiments may be selectively combined.
The specific implementations described in this embodiment are illustrative and do not in any way limit the scope of the invention. For brevity of description, descriptions of conventional electronic configurations, control systems, software, and other functional aspects of such systems may be omitted. Also, the connections or connecting members of the lines between the components shown in the figures are illustrative of functional connections and / or physical or circuit connections, which may be replaced or additionally provided by a variety of functional connections, physical Connection, or circuit connections.
In this specification (particularly in the claims), the use of the terms "above" and similar indication words may refer to both singular and plural. In addition, when a range is described, it includes the individual values belonging to the above range (unless there is a description to the contrary), and the individual values constituting the above range are described in the detailed description. Finally, if there is no explicit description or contradiction to the steps constituting the method, the steps may be performed in an appropriate order. It is not necessarily limited to the description order of the above steps. The use of all examples or exemplary terms (e. G., The like) is merely intended to be illustrative of technical ideas and is not to be limited in scope by the examples or the illustrative terminology, except as by the appended claims. It will also be appreciated by those skilled in the art that various modifications, combinations, and alterations may be made depending on design criteria and factors within the scope of the appended claims or equivalents thereof.
Claims (15)
A light irradiation unit;
A beam splitter for separating the laser beam from the light irradiating unit into a signal beam and a reference beam;
A reference beam optical system for irradiating the reference beam to a holographic material;
A lens array including a plurality of elemental lenses; And
And a signal beam optical system for irradiating the signal beam to the lens array,
And an interference fringe of the signal beam modulated through the reference beam and the lens array is recorded in the hologram recording medium.
The light-
A plurality of light sources emitting laser beams of different wavelengths;
A plurality of mirrors for superposing the laser beams of the different wavelengths into a beam having one path;
A shutter for determining an exposure time of the superimposed beam; And
And a beam expander to expand the width of the superimposed beam.
The reference beam optical system includes:
A first mirror for reflecting the reference beam such that the reference beam is irradiated at an angle defined by the hologram recording medium; And
And a first aperture for adjusting the area irradiated by the reference beam onto the hologram recording medium.
The signal beam optical system includes:
A second mirror for reflecting the signal beam such that the signal beam is irradiated in a direction perpendicular to the lens array; And
And a second aperture for adjusting the area irradiated by the signal beam to the lens array.
Further comprising: a stage in which the hologram recording medium is disposed and moving so as to change a position of an area in the hologram recording medium on which the interference fringes are recorded.
Wherein the interference fringe is generated by crossing the reference beam and the modulated signal beam through mutually opposite surfaces of the hologram recording medium.
And selectively displays a two-dimensional or three-dimensional image according to a size of a pixel in an image incident from the outside to the holographic optical element.
Dimensional image when the size of the pixel in the image is smaller than the size of each of the ellipses,
Dimensional image when the size of each of the element lenses is larger than twice the size of pixels in the image.
Wherein the two-dimensional or three-dimensional image is displayed in full-color.
Emitting a laser beam;
Separating the laser beam into a signal beam and a reference beam;
Irradiating the reference beam to a holographic material;
Irradiating the signal beam to a lens array including a plurality of elemental lenses; And
And recording the interference pattern of the signal beam and the signal beam modulated through the lens array in the hologram recording medium.
Emitting laser beams of different wavelengths;
Overlapping the laser beams of the different wavelengths with a beam having one path; And
Further comprising: expanding the width of the superimposed beam.
Wherein the step of irradiating the reference beam comprises:
Reflecting the reference beam such that the reference beam is irradiated at an angle predefined in the hologram recording medium; And
And adjusting an area of the reference beam irradiated on the hologram recording medium.
Wherein the step of irradiating the signal beam comprises:
Reflecting the signal beam such that the signal beam is directed in a direction perpendicular to the lens array; And
And adjusting an area of the reference beam irradiated to the lens array.
And changing the position of an area in the hologram recording medium on which the interference fringes are recorded.
Wherein the interference fringe is generated by crossing the reference beam and the modulated signal beam through mutually opposite surfaces of the hologram recording medium.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140172385A KR20160066942A (en) | 2014-12-03 | 2014-12-03 | Apparatus and method for manufacturing Holographic Optical Element |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140172385A KR20160066942A (en) | 2014-12-03 | 2014-12-03 | Apparatus and method for manufacturing Holographic Optical Element |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101701168B1 (en) | 2016-05-11 | 2017-02-01 | 가천대학교 산학협력단 | Genomic profile method for in-silico interaction-resolution pathway activity quantification |
| WO2019142953A1 (en) * | 2018-01-19 | 2019-07-25 | 전자부품연구원 | Foveated near-eye display system for resolving problem of vergence-accommodation conflict |
| CN111308704A (en) * | 2018-12-12 | 2020-06-19 | 三星电子株式会社 | Three-dimensional display apparatus and method |
| WO2021060828A1 (en) * | 2019-09-27 | 2021-04-01 | 주식회사 엘지화학 | Display lens manufacturing apparatus and method, and head-mounted display device comprising display lens manufactured thereby |
| KR20210064006A (en) * | 2019-11-25 | 2021-06-02 | 재단법인 구미전자정보기술원 | Method and apparatus for ouputting 3dimension image using hologram optical element |
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- 2014-12-03 KR KR1020140172385A patent/KR20160066942A/en not_active Application Discontinuation
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| WO2021060828A1 (en) * | 2019-09-27 | 2021-04-01 | 주식회사 엘지화학 | Display lens manufacturing apparatus and method, and head-mounted display device comprising display lens manufactured thereby |
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| KR20210064006A (en) * | 2019-11-25 | 2021-06-02 | 재단법인 구미전자정보기술원 | Method and apparatus for ouputting 3dimension image using hologram optical element |
| KR20210084035A (en) * | 2019-12-27 | 2021-07-07 | 고려대학교 산학협력단 | A polarized holographic microscope system and sample image acquisition method using the same |
| WO2022080563A1 (en) * | 2020-10-15 | 2022-04-21 | 한국전자기술연구원 | Method and apparatus for generating hogel for manufacturing digital holographic optical device |
| WO2022124445A1 (en) * | 2020-12-10 | 2022-06-16 | 한국전자기술연구원 | Airplane simulator apparatus using holographic optical element |
| WO2023054793A1 (en) * | 2021-09-30 | 2023-04-06 | 한국전자기술연구원 | Augmented reality device using hologram lens and manufacturing apparatus |
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