KR20200044541A - Hologram generating apparatus capable of changing of hogel size - Google Patents

Abstract

Disclosed is a device capable of variously changing a hogel size in generating a holographic stereogram. A hologram generation device, according to the present application, comprises: a light source; a mounting unit on which a photosensitive material is mounted; an optical unit which divides the light emitted from the light source into a reference beam and an object beam, and induces the reference beam and the object beam to be emitted to the photosensitive material mounted on the mounting unit; a spatial light modulation unit disposed on an optical path of the object beam; first and second variable openings in which at least two openings of different sizes are formed; and a control unit outputting a control signal to the optical unit, the spatial light modulation unit and the mounting unit. The first variable opening is disposed between the light source on the optical path of the reference beam and the photosensitive material mounted on the mounting unit. The second variable opening is disposed between the light source on the optical path of the object beam and the photosensitive material mounted on the mounting unit.

Description

A hologram generating device capable of adjusting the change in the size of a hogel {HOLOGRAM GENERATING APPARATUS CAPABLE OF CHANGING OF HOGEL SIZE}

The present invention relates to a hologram generating apparatus, and more particularly, to a hologram generating apparatus capable of variously changing the size of a hogel in generating a hologram.

1 is a flowchart of a method for acquiring data for a hologram according to the prior art.

2 is a reference diagram for acquiring data for a hologram according to the prior art.

Referring to FIGS. 1 and 2 together, the prior art first specifies the Hogel and the aspect ratio. Next, a perspective view is taken from the 3D model and the image is saved. Each photographed multi-projection image is divided according to a preset aspect ratio. Next, hogel is produced through rearrangement. The resulting hogel is recorded on a hologram recording material (hologram film).

In the case of generating a hologram according to the prior art, the number and width of the horizontal and vertical division ratios of the Hogel, that is, the number of Hogels included in the hologram graphic are determined according to the size of the Hogel. The number of Hogel influences the size of data for a multi-view projection image, and may be a standard for data processing time and storage time, resources, and cost required for hologram generation.

Patent Publication No. 10-2016-0032296, 2016.03.24

An object of the present specification is to provide a device capable of variously changing the size of a hogel in generating a holographic stereogram.

The present specification is not limited to the above-mentioned problems, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A hologram generating apparatus according to the present specification for solving the above-mentioned problems includes a light source; A mounting portion on which the photosensitive material is mounted; An optical unit for dividing the light irradiated from the light source into a reference beam and an object beam, and guiding the reference beam and the object beam to be irradiated to the photosensitive material mounted on the mounting unit; A spatial light modulator disposed on the optical path of the object beam; First and second variable openings in which at least two openings of different sizes are formed; And a control unit that outputs a control signal to the optical unit, the spatial light modulator, and the mounting unit, wherein the first variable opening comprises: a light source and a mounting unit mounted on a light path of a reference beam. It is disposed between the photosensitive material, and the second variable opening may be disposed between the light source and the photosensitive material mounted on the mounting portion on the optical path of the object beam.

According to one embodiment of the present specification, the first and second variable openings are rotatable disk shapes, and the centers of the two or more openings may be formed to be located at the same distance from the center point of the disks.

In this case, the two or more openings may be arranged adjacent to each other in order of size.

According to one embodiment of the present specification, the light source may be composed of a red continuous wave laser, a green continuous wave laser, and a blue continuous wave laser.

The hologram generating apparatus according to the present specification may further include a shutter blocking the beam irradiated from the light source. In this case, the shutter may be located on the optical path before the light irradiated from the light source on the optical path is divided into the reference beam and the object beam.

Other specific matters of the present invention are included in the detailed description and drawings.

According to the present specification, a holographic stereogram having various resolutions may be generated by selecting various sizes of hogels. Furthermore, the data processing time and cost can be appropriately adjusted in the process of generating the holographic stereogram according to the size of the hogel, thereby reducing the economic burden.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a flowchart of a method for acquiring data for a hologram according to the prior art.
2 is a reference diagram for acquiring data for a hologram according to the prior art.
3 is a reference diagram schematically showing a configuration of a hologram generating apparatus according to an embodiment of the present specification.
4 is an exemplary view of a variable opening according to an embodiment of the present specification.

Advantages and features of the invention disclosed in the present specification, and a method of achieving them will be apparent by referring to embodiments described below in detail with reference to the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present specification to be complete, and are common in the technical field to which the present specification pertains. It is provided to fully describe the scope of the present specification to a technical person (hereinafter 'the person'), and the scope of rights of the present specification is only defined by the scope of the claims.

The terminology used herein is for describing the embodiments and is not intended to limit the scope of rights of the present specification. In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and / or “comprising” does not exclude the presence or addition of one or more other components other than the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and “and / or” includes each and every combination of one or more of the mentioned components. Although "first", "second", etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a sense that can be commonly understood by those skilled in the art to which this specification belongs. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless explicitly defined.

The spatially relative terms “below”, “beneath”, “lower”, “above”, “upper”, etc., are as shown in the figure. It can be used to easily describe a correlation between a component and other components. The spatially relative terms should be understood as terms including different directions of components in use or operation in addition to the directions shown in the drawings. For example, if a component shown in the drawing is flipped over, the component described as "below" or "beneath" the other component will lie "above" the other component. You can. Thus, the exemplary term “below” can include both the directions below and above. Components can also be oriented in different directions, and thus spatially relative terms can be interpreted according to orientation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The hologram generating apparatus according to the present specification may include a light source, a mounting unit, an optical unit, a spatial light modulation unit, a first variable opening, a second variable opening, and a control unit.

3 is a reference diagram schematically showing a configuration of a hologram generating apparatus according to an embodiment of the present specification.

Referring to FIG. 3, a red laser, a green laser, and a blue laser can be identified as light sources. The red laser, the green laser, and the blue laser may be continuous wave lasers, not pulse lasers. In general, in the case of a pulse laser, to reduce the exposure time, the light source according to the present specification may generate a stable hologram using a continuous wave laser.

In this specification, a path through which the light irradiated from the light source reaches the photosensitive material mounted on the mounting portion will be referred to as a 'light path'. On the other hand, in generating the hologram, light from the same light source is divided into 'object beam' and 'reference beam' to reach the photosensitive material, and the light from the light source is divided into 'object beam' and 'reference beam' After losing, we will name them 'light path of the object beam' and 'light path of the reference beam'.

When the light source is configured as a continuous wave laser device, the hologram generating device according to the present specification may further include a shutter blocking the beam irradiated from the light source. At this time, the shutter may be positioned on the optical path before the light irradiated from the light source on the optical path is divided into the reference beam and the object beam. As an example, the shutter may be an ultra-high-speed shutter composed of an Acousto-Optic Modulator (AOM).

The optical unit divides the light irradiated from the light source into a reference beam and an object beam, and serves to induce the reference beam and the object beam to be irradiated to the photosensitive material mounted on the mounting portion. 1 shows an example in which the optical part is composed of a mirror 1 to 8, a beam splitter 1 to 5, and an optical head.

In FIG. 1, the red laser beam may go to the shutter through mirror 1, beam splitter 1, and beam splitter 2. The green laser beam can go to the shutter through beamsplitter 1 and beamsplitter 2. The blue laser beam can pass through the beamsplitter 2 to the shutter. The three-color laser beam may be controlled to represent an optimal color through each light amount controller. The optimally synthesized color beam passes through the shutter and the beam reflected from the mirror 2 is divided into a reference beam and an object beam through beam splitters 3, 4, and 5.

Object beams composed of R, G, and B may be respectively input to the spatial light modulator. The spatial light modulator may be composed of three R, G, B LCD. The red beam is input from the beam splitter 3 through the mirror 4 to the red LCD. The green beam is input from the beam splitter 4 to the green LCD, and the blue beam is input from the beam splitter 5 through the mirror 3 to the blue LCD. The color Hogel image that passed through the LCD enters the optical head through the mirror 5. The optical head may be arranged such that the focus of the object beam is overlying the photosensitive material.

On the other hand, the reference beam from the mirror 6 is incident on the photosensitive material through the mirror 7 or mirror 8 (in this case, removing the mirror 7). According to one embodiment of the present specification, the reference beam may be incident on the photosensitive material at a vertical or 45 degree angle. That is, the reference beam and the object beam can be simultaneously incident from opposite sides of the photosensitive material in a region corresponding to a small Hogel size.

The first and second variable openings may have at least two or more openings of different sizes.

4 is an exemplary view of a variable opening according to an embodiment of the present specification.

4, the variable opening has a rotatable disc shape. It can be further confirmed that the center of the opening formed in the disc-shaped variable opening is located at the same distance from the center point of the disc. In addition, the openings may be arranged adjacent to each other in order of size. The size of the hogel may be determined according to the size of the opening. That is, a large sized opening is for a low resolution Hogel, and a small sized opening is for a high resolution Hogel.

The first variable opening is disposed between the light source and the photosensitive material mounted on the mounting portion on the optical path of the reference beam, and the second variable opening is mounted on the light source and the mounting portion on the optical path of the object beam. It can be disposed between the photosensitive material.

While moving the photosensitive material up, down, left, and right, the image of the LCD is changed at each step, waits until the system vibration disappears, and then the subsequent hogel is exposed to record the entire hogel on the photosensitive material. When all necessary LCD images have been recorded and processed, the full color 3D full parallax hologram production is completed. The photosensitive material may be a hologram plate, a film, or a photopolymer.

Meanwhile, the control unit may output control signals to the optical unit, the spatial light modulation unit, and the mounting unit. In FIG. 1, the controller is illustrated as a 'motor controller', a 'LCD controller', a 'switch controller', and a 'computer'.

The control unit may be implemented as a computer program. The computer program is a C / C ++, C #, JAVA, Python that the computer's processor (CPU) can read through the device interface of the computer in order for the computer to read the program and execute the methods implemented as a program. , Code coded in a computer language such as a machine language. Such code may include functional code related to a function defining functions required to execute the above methods, and control code related to an execution procedure necessary for the processor of the computer to execute the functions according to a predetermined procedure. can do. In addition, the code may further include a memory reference related code to which location (address address) of the internal or external memory of the computer should be referred to additional information or media necessary for the computer's processor to perform the functions. have. Also, when the processor of the computer needs to communicate with any other computer or server in the remote to execute the functions, the code can be used to communicate with any other computer or server in the remote using the communication module of the computer. It may further include a communication-related code for whether to communicate, what information or media to transmit and receive during communication, and the like.

The storage medium refers to a medium that stores data semi-permanently and that can be read by a device, rather than a medium that stores data for a short moment, such as registers, caches, and memory. Specifically, examples of the storage medium include, but are not limited to, ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. That is, the program may be stored in various recording media on various servers that the computer can access or various recording media on the user's computer. In addition, the medium may be distributed over a computer system connected through a network to store computer-readable codes in a distributed manner.

The embodiments of the present specification have been described above with reference to the accompanying drawings, but a person skilled in the art to which the present specification pertains may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims (5)

Light source;
A mounting portion on which the photosensitive material is mounted;
An optical unit for dividing the light irradiated from the light source into a reference beam and an object beam, and guiding the reference beam and the object beam to be irradiated to the photosensitive material mounted on the mounting unit;
A spatial light modulator disposed on the optical path of the object beam;
First and second variable openings in which at least two openings of different sizes are formed; And
A control unit for outputting a control signal to the optical unit, the spatial light modulator and the mounting unit; Hologram generating apparatus comprising a,
The first variable opening is disposed between the light source and the photosensitive material mounted on the mounting portion on the optical path of the reference beam,
The second variable opening, a hologram generating device disposed between the light source and the photosensitive material mounted on the mounting portion on the optical path of the object beam. The method according to claim 1,
The first and second variable openings are rotatable disk shapes,
The center of the two or more openings, the hologram generating device is formed to be located at the same distance from the center point of the disk. The method according to claim 2,
The two or more openings are hologram generating devices arranged adjacently in the order of size. The method according to claim 1,
The light source is a hologram generating device composed of a red continuous wave laser, a green continuous wave laser, and a blue continuous wave laser. The method according to claim 4,
Further comprising a shutter for blocking the beam irradiated from the light source,
The shutter is a hologram generating device located on the optical path before the light irradiated from the light source on the optical path is divided into the reference beam and the object beam.

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