JP2022041486A - Hologram exposure device - Google Patents

Abstract

To provide a hologram exposure device with which it is possible to suppress reflection and suppress the occurrence of chromatic aberration with respect to multiple beams of light entering from mutually different directions.SOLUTION: A hologram exposure device 1 comprises: a semi-spherical lens 11 having a curved surface part 11a and a plane part 11b, with a plurality of plane regions 11x formed on the curved surface part 11a; a hologram recording medium 12 for recording interference fringes by incident object light and reference light and installed to the plane part 11b of the semi-spherical lens 11; a laser device 20 for emitting a laser beam pertaining to the object light and reference light; and a plurality of mirrors 40 designed such that a laser beam pertaining to the object light and reference light emitted from the laser device 20 vertically enters a plurality of plane regions 11x from mutually different directions and is reflected so as to reach the hologram recording medium 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hologram exposure apparatus.

As an image display method in a conventional eyeglass-type image display device, for example, a retinal projection method in which image light is projected toward a user's eye is known. However, the retinal projection method has a problem that the Eyebox and the viewing angle are narrow. Eyebox is a range in which an image (virtual image) can be visually recognized even if the user moves his / her eyes when the user wears a spectacle-type image display device. Therefore, as an example of a technique for enlarging the Eyebox and expanding the viewing angle, a technique has been proposed in which the light reproduced by the transmission hologram is reflected by the reflection hologram so as to be focused on the Eyebox (see, for example, Patent Document 1).

U.S. Patent Application Publication No. 2020/0174255

In a method such as Patent Document 1, it is necessary to spread one light vertically and horizontally (radially) and duplicate it in order to enlarge the Eyebox. For example, as shown in FIG. 5, the transmitted hologram 500 radially spreads and duplicates one incident reference light and transmits it to the reflected hologram 600 side. Such a transmission hologram 500 is created, for example, by interfering one reference light with a plurality of object lights incident from different directions, as shown in FIG.

When exposing a hologram, we want only specific light to be incident on the hologram. However, the hologram is generally configured to be sandwiched between transparent members such as glass and plastic film, and depending on the incident angle of the reference light or the object light, the reference light or the object light is reflected by the surface of the transparent member. , Reference light or object light may not reach the hologram. In order to improve such a problem, a configuration for suppressing reflection of reference light or object light (a configuration for promoting light transmission) is provided. As a configuration for promoting the transmission of light, there is a configuration using a prism that eliminates the difference in refractive index between the hologram and air. However, in the configuration using a prism, there is a problem that chromatic aberration occurs due to a different refractive index for each wavelength when the reference light or the object light is not vertically incident on the prism.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hologram exposure apparatus capable of suppressing reflection and suppressing chromatic aberration of a plurality of lights incident from different directions. do.

The hologram exposure apparatus according to one aspect of the present disclosure includes a hemispherical lens having a curved surface portion and a flat surface portion and having a plurality of planar regions formed on the curved surface portion, and object light and incident object light arranged on the flat surface portion of the hemispherical lens. A hologram recording medium that records interference fringes with reference light, a laser device that emits laser light related to object light and reference light, and laser light emitted from the object light and reference light from different directions. , A plurality of mirrors that are vertically incident on a plurality of planar areas and are reflected so as to reach a hologram recording medium.

In the hologram exposure apparatus according to one aspect of the present disclosure, no matter how many times the object light and the laser beam related to the reference light are incident on the hemispherical lens and are incident on the hologram recording medium via the hemispherical lens, hologram recording is performed. It is possible to appropriately suppress that the object light and the reference light are reflected by the hologram recording medium due to the difference in the refractive index between the medium and the air. Further, in this hologram exposure apparatus, the object light emitted by the laser apparatus and the laser beam related to the reference light are vertically incident on a plurality of plane regions formed on the curved surface portion of the hemispherical lens from different directions. It is reflected by a plurality of mirrors so as to reach the hologram recording medium arranged on the plane portion of the hemispherical lens. According to such a configuration, the laser light (parallel light) related to the object light and the reference light is always vertically incident on the plane region formed on the curved surface portion of the hemispherical lens, so that the above-mentioned chromatic aberration is caused. It doesn't matter. As described above, in the hologram exposure apparatus according to one aspect of the present disclosure, it is possible to suppress reflection and suppress the occurrence of chromatic aberration. Further, according to such a configuration, since the design can be performed without separately considering the influence of chromatic aberration and refraction of light, the design of the exposure optical system becomes easy.

According to the present invention, it is possible to provide a hologram exposure apparatus capable of suppressing reflection and suppressing the occurrence of chromatic aberration.

It is a schematic diagram which shows the structure of the hologram exposure apparatus. It is a figure which shows the example of the optical path which concerns on the exposure of a transmission hologram. It is a figure which shows the example of the optical path which concerns on the exposure of a reflection hologram. It is a figure which shows the hemispherical lens which concerns on a modification. It is a figure which shows the example of the optical path which concerns on the conventional Eyebox expansion. It is a figure which shows the example of the optical path which concerns on the exposure of the conventional transmission hologram. It is a figure which shows the hardware configuration example of a control part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and duplicate description is omitted.

FIG. 1 is a schematic view showing the configuration of the hologram exposure apparatus 1. The hologram exposure apparatus 1 is an apparatus that records (exposes) interference fringes on a hologram by a plurality of laser beams. The hologram exposure apparatus 1 includes an exposure unit 10, a laser apparatus 20, a beam splitter 30, a plurality of mirrors 40, and a spatial filter 50. The exposure unit 10 includes a hemispherical lens 11 and a hologram recording medium 12.

Each configuration of the hologram exposure apparatus 1 may be fixed by a three-story support member (for example, a pillar, a floor, a base, a frame, etc.). In FIG. 1, the first floor and the second floor of the hologram exposure apparatus 1 are shown by squares, and the support member on the third floor of the hologram exposure apparatus 1 is omitted. In the following description, the long side direction of the first floor of the hologram exposure device 1 is the "X direction", the short side direction of the first floor of the hologram exposure device 1 is the "Y direction", and the directions are orthogonal to the X direction and the Y direction. The direction may be described as "Z direction". Further, with respect to the Z direction, the vertical downward direction may be described as "downward" and the vertical upward direction may be described as "upper".

The hemispherical lens 11 is a hemispherical lens having a curved surface portion 11a and a flat surface portion 11b, and a plurality of plane regions 11x are formed on the curved surface portion 11a. The hemispherical lens 11 is made of a transparent member such as plastic or glass, and has a refractive index equivalent to that of the hologram recording medium 12 and the transparent member sandwiching the hologram recording medium 12. The curved surface portion 11a of the hemispherical lens 11 is a surface corresponding to the curved surface of the hemisphere. The plane portion 11b of the hemisphere lens 11 is a surface corresponding to the plane (cross section) of the hemisphere. The plurality of plane regions 11x are regions that are incident surfaces of the laser beam.

The plurality of planar regions 11x are formed on the surface of the curved surface portion 11a of the hemispherical lens 11. The plurality of plane regions 11x are located radially when the curved surface portion 11a is viewed from the center of the plane portion 11b of the hemispherical lens 11. The plurality of plane regions 11x may be formed, for example, by scraping the surface of the curved surface portion 11a of the hemispherical lens 11. The plurality of plane regions 11x may be formed continuously in a polygon mesh shape, or may be formed apart from each other. The number of the plurality of plane regions 11x and the shape of the surface are not limited.

The hemispherical lens 11 is arranged so that the curved surface portion 11a faces downward in the Z direction and the flat surface portion 11b faces upward in the Z direction. For example, in the vicinity of the center of the hologram exposure device 1, the hemispherical lens 11 is arranged so that the flat surface portion 11b is fixed to the third floor of the hologram exposure device 1 and the curved surface portion 11a is exposed to the second floor of the hologram exposure device 1. .. The hemispherical lens 11 may have, for example, a protrusion for holding the hemispherical lens 11.

The hologram recording medium 12 is arranged on the flat surface portion 11b of the hemispherical lens 11 and records interference fringes by incident object light and reference light. The hologram recording medium 12 is, for example, a dry plate or film for transmission hologram use or reflection hologram use. The hologram recording medium 12 has one surface and the other surface. One surface is a surface on the side close to (contacting) the flat surface portion 11b when the hologram recording medium 12 is arranged on the flat surface portion 11b of the hemispherical lens 11. The other surface is the surface on the side farther from the flat surface portion 11b when the hologram recording medium 12 is arranged on the flat surface portion 11b of the hemispherical lens 11. The transmission hologram is created by causing the object light and the reference light to interfere with each other from the same surface (for example, one surface) of the hologram recording medium 12. The reflected hologram is created by causing the reference light and the object light to interfere with each other from different surfaces (for example, one surface and the other surface) of the hologram recording medium 12.

The laser device 20 emits laser light related to object light and reference light. The number of laser devices 20 may be one or a plurality. By using as many laser devices 20 as there are object lights, the laser device 20 may emit a plurality of laser lights having different coherences from each other. When a plurality of laser devices 20 are used, it is necessary to use the same laser device for the object light and the corresponding reference light. The laser device 20 is arranged on the first floor of the hologram exposure device 1.

The beam splitter 30 splits the laser light related to the object light and the reference light emitted by the laser device 20 into a plurality of parts. The beam splitter 30 is composed of, for example, a combination of a plurality of half mirrors, mirrors, and the like. The laser beam emitted by the laser device 20 is vertically incident on the beam splitter 30. The beam splitter 30 divides the incident laser light into four in directions orthogonal to each other (X direction and Y direction), for example. The number of divisions of the laser beam is not limited. The beam splitter 30 is arranged in the center of the first floor of the hologram exposure apparatus 1.

The plurality of mirrors 40 reflect the object light emitted by the laser device 20 and the laser light related to the reference light so as to vertically enter the plurality of plane regions 11x from different directions and reach the hologram recording medium 12. do.

The plurality of mirrors 40 are configured to include, for example, a plurality of mirrors 40a on the first floor of the hologram exposure apparatus 1, a plurality of mirrors 40b on the third floor, and a plurality of mirrors 40c on the second floor. The plurality of mirrors 40a are arranged at the same height on the first floor of the hologram exposure apparatus 1. Similarly, the plurality of mirrors 40b and 40c are arranged at the same height on the third floor and the second floor of the hologram exposure apparatus 1. In this way, by aligning the heights of the plurality of mirrors 40a, 40b, 40c arranged on the first floor, the second floor, and the third floor of the hologram exposure apparatus 1, the Z direction can be adjusted when adjusting the optical axis. It will be simple. Further, in order to adjust the optical axis, it is necessary to reflect by two or more mirrors. However, in the present embodiment, all of the plurality of mirrors 40a, 40b, 40c are not in the same layer, but in each layer of the hologram exposure apparatus 1. It is arranged separately. As a result, sufficient space is secured in each layer for arranging a plurality of mirrors. The plurality of mirrors 40b are arranged on the plurality of mirrors 40a in the Z direction. The plurality of mirrors 40c are arranged on the second floor of the hologram exposure apparatus 1 between the plurality of mirrors 40b and the hemispherical lens 11.

The plurality of mirrors 40 guide the laser light related to the object light and the reference light to the hemispherical lens 11. In FIG. 1, the laser device 20 emits laser light toward the beam splitter 30. The beam splitter 30 divides the laser beam emitted by the laser apparatus 20 into four in directions orthogonal to each other (X direction and Y direction). The plurality of mirrors 40a provided at positions corresponding to the laser beams divided into four are the third floor of the plurality of mirrors 40b (hologram exposure apparatus 1), in which the laser beam related to the object light and the reference light divided by the beam splitter 30 is transferred to the plurality of mirrors 40b. ) Reflects. That is, each mirror 40a and each mirror 40b have a one-to-one correspondence, and each mirror 40a reflects a laser beam toward the corresponding mirror 40b. The plurality of mirrors 40b reflect the laser light reflected by the plurality of mirrors 40a toward the plurality of mirrors 40c (second floor of the hologram exposure apparatus 1). That is, each mirror 40b and each mirror 40c have a one-to-one correspondence, and each mirror 40b reflects a laser beam toward the corresponding mirror 40c. The plurality of mirrors 40c reflect the laser beam reflected by the plurality of mirrors 40b toward the hemispherical lens 11.

The spatial filter 50 removes interference fringes of incident light and emits noise-free and shaped parallel light. The spatial filter 50 is composed of, for example, a combination of a condenser lens, a pinhole, a collimating lens, and the like. The spatial filter 50 is arranged between the plurality of mirrors 40a and the plurality of mirrors 40b. The spatial filter 50 passes the inside of the spatial filter 50 and emits the laser beam related to the object light and the reference light incident from the plurality of mirrors 40a to the plurality of mirrors 40c. Although only one spatial filter 50 is shown in FIG. 1, for example, the spatial filter 50 may be arranged on each optical path of the object light and the laser beam related to the reference light divided by the beam splitter 30.

FIG. 2 is a diagram showing an example of an optical path related to exposure of a transmission hologram. FIG. 2 shows that the laser beam related to the plurality of object lights and the laser beam related to one reference light are vertically incident on the plurality of planar regions 11x of the hemispherical lens 11 from different directions. The laser beam related to the object light and the reference light travels inside the hemispherical lens 11 without refraction, is concentrated in the center of the flat surface portion 11b of the hemispherical lens 11, and reaches the hologram recording medium 12. As shown in FIG. 2, when a plurality of object lights and one reference light reach and interfere with one surface of the hologram recording medium 12, the hologram recording medium 12 is exposed as a transmission hologram.

FIG. 3 is a diagram showing an example of an optical path related to exposure of a reflected hologram. FIG. 3 shows that the laser beams related to the plurality of reference lights are vertically incident on the plurality of planar regions 11x of the hemispherical lens 11 from different directions. The exposure unit 10 further includes an object light lens 13 and a movement mechanism unit 14. The hologram exposure apparatus 1 further includes a control unit 60 and a shutter 70.

The object light lens 13 is a lens for irradiating the laser beam related to the object light from the flat surface portion 11b side of the hemispherical lens 11 toward the hologram recording medium 12. The object light lens 13 is arranged above the flat surface portion 11b of the hemispherical lens 11 in the Z direction. The object light lens 13 irradiates the other surface of the hologram recording medium 12 with a laser beam related to the object light.

The moving mechanism unit 14 moves the position of the object light lens 13 so that the selected one of the laser beams related to the reference light corresponds to the position of the object light lens 13. For example, the moving mechanism unit 14 may move the position of the object light lens 13 in the X direction and the Y direction according to the control signal from the control unit 60.

The control unit 60 is a circuit that performs various types of control. The control unit 60 transmits a control signal to the shutter 70 to control the operation of the shutter 70. The control unit 60 transmits a control signal to the movement mechanism unit 14 to control the operation of the movement mechanism unit 14. For example, the control unit 60 controls the operation of the shutter 70 so that the selected one of the laser beams related to the reference light passes through, and the selected one of the reference lights and the position of the object light lens 13 are set. The operation of the moving mechanism unit 14 may be controlled so as to have a one-to-one correspondence.

The shutter 70 is arranged on the optical path of the laser beam related to the object light and the reference light, and controls the passage or blocking of the laser beam by performing an opening / closing operation according to a control signal received from the control unit 60. The shutter 70 is arranged, for example, between the beam splitter 30 and the plurality of mirrors 40a. Although only one shutter 70 is shown in FIG. 3, the shutter 70 may be arranged on each optical path of the laser beam related to the object light and the reference light. The shutter 70, for example, has an operation of passing all the laser light related to the object light and the reference light, an operation of blocking all the laser light related to the object light and the reference light, and individually blocking the laser light related to the object light and the reference light. Perform operations, etc. For example, the shutter 70 blocks the optical path so that the laser beam related to the reference light is always one.

Next, the operation and effect of the hologram exposure apparatus 1 according to the present embodiment will be described.

The hologram exposure apparatus 1 according to the present embodiment has a curved surface portion 11a and a flat surface portion 11b, and is arranged on a hemispherical lens 11 in which a plurality of planar regions 11x are formed on the curved surface portion 11a and a flat surface portion 11b of the hemispherical lens 11. , A hologram recording medium 12 that records interference fringes by incident object light and reference light, a laser device 20 that emits laser light related to the object light and reference light, and object light and reference light emitted by the laser device 20. A plurality of mirrors 40 are provided, wherein the laser light is vertically incident on the plurality of plane regions 11x from different directions and reflected so as to reach the hologram recording medium 12.

In the hologram exposure apparatus 1 according to the present embodiment, the object light and the laser beam related to the reference light are incident on the hemispherical lens 11 and incident on the hologram recording medium 12 via the hemispherical lens 11 no matter how many times. It is possible to appropriately suppress that the object light and the reference light are reflected by the hologram recording medium 12 due to the difference in the refractive index between the hologram recording medium 12 and the air. Further, in the hologram exposure apparatus 1, the object light emitted by the laser apparatus 20 and the laser beam related to the reference light are perpendicular to a plurality of planar regions 11x formed on the curved surface portion 11a of the hemispherical lens 11 from different directions. Is reflected by a plurality of mirrors 40 so as to reach the hologram recording medium 12 arranged on the flat surface portion 11b of the hemispherical lens 11. According to such a configuration, the laser light (parallel light) related to the object light and the reference light is always vertically incident on the plane region 11x formed on the curved surface portion 11a of the hemispherical lens 11. Chromatic aberration is not a problem. As described above, in the hologram exposure apparatus 1 according to the present embodiment, it is possible to suppress reflection and suppress the occurrence of chromatic aberration. Further, according to such a configuration, since the design can be performed without separately considering the influence of chromatic aberration and refraction of light, the design of the exposure optical system becomes easy.

In the hologram exposure apparatus 1 according to the present embodiment, the object light lens 13 for irradiating the laser beam related to the object light from the flat surface portion 11b side of the hemispherical lens 11 toward the hologram recording medium 12, and the reference light. A moving mechanism unit 14 for moving the position of the object light lens 13 may be further provided so that the selected one of the laser beams corresponds to the position of the object light lens 13. According to such a configuration, the hologram recording medium 12 is irradiated with the laser beam related to the object light from the flat surface portion 11b side of the hemispherical lens 11, and the reference light is emitted from the plurality of flat surface regions 11x of the curved surface portion 11a of the hemispherical lens 11. The laser beam according to the above is incident and reaches the hologram recording medium 12. As a result, the object light incident from the flat surface portion 11b side of the hemispherical lens 11 and the reference light incident from the plurality of flat surface regions 11x of the curved surface portion 11a of the hemispherical lens 11 interfere with each other to expose the hologram recording medium 12. can. Further, by moving the lens 13 for object light corresponding to the selected one of the laser light related to the reference light, the reproduction position of the object light corresponding to the incident angle of each reference light is set on the hologram recording medium 12. Recorded. In such a configuration, when the reference light is reflected on the other surface of the hologram recording medium 12 due to the difference in refractive index between the hologram recording medium 12 and air, a prism or the like is installed on the hologram recording medium 12. Is desirable.

In the hologram exposure apparatus 1 according to the present embodiment, the shutter 70 may block the optical path so that the laser beam related to the reference light is always one. According to such a configuration, the hologram recording medium 12 is irradiated with the laser beam related to the object light from the flat surface portion 11b side of the hemispherical lens 11, and among the plurality of flat surface regions 11x of the curved surface portion 11a of the hemispherical lens 11. A laser beam related to one reference light is incident from one plane region 11x and reaches the hologram recording medium 12. This makes it possible to expose the hologram recording medium 12 while independently separating the reference light.

In the hologram exposure apparatus 1 according to the present embodiment, the laser apparatus 20 may emit a plurality of laser beams having different coherences from each other. In such a configuration, the object light corresponding to the reference light needs to be the same laser light source (same coherence light). According to such a configuration, even if a plurality of holograms are formed overlapping at the same position, the coherence is different from each other, so that the corresponding reference light and the object light interfere individually, and each interference fringe is a hologram. It is recorded on the recording medium 12. As a result, the hologram recording medium 12 can be exposed at once without adjusting the interference timing of the reference light while independently separating the reference light.

[Modification example]
The above description has been made in detail based on the embodiments of the present disclosure. However, the present disclosure is not limited to the above embodiment. This disclosure can be modified in various ways without departing from its gist.

In the embodiment, it has been described that the plurality of planar regions 11x of the hemispherical lens 11 may be formed by scraping the surface of the curved surface portion 11a of the hemispherical lens 11, but it is formed by combining the hemispherical lens and the plano-concave lens. You may. FIG. 4 is a diagram showing a hemispherical lens 110 according to a modified example. FIG. 4A shows that the curvature of the curved surface portion 110a of the hemispherical lens 110 and the curvature of the concave surface of the plano-concave lens 111 are the same. FIG. 4B shows that the curved surface portion 110a of the hemispherical lens 110 and the concave surface of the plano-concave lens 111 are adhered to each other. Although only one plano-concave lens 111 is shown in FIG. 4, the plano-concave lens 111 may be adhered to correspond to the number of a plurality of planar regions 11x. According to such a configuration, the plane of the plano-concave lens 111 corresponds to a plurality of plane regions 11x of the hemispherical lens 11. As a result, it is possible to easily form a region corresponding to a plurality of planar regions 11x of the hemispherical lens 11 without scraping off the hemispherical lens 110.

Finally, the hardware configuration of the control unit 60 included in the hologram exposure apparatus 1 will be described with reference to FIG. 7. The control unit 60 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the word "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the control unit 60 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For each function in the control unit 60, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation, and communication by the communication device 1004, the memory 1002, and the storage 1003 are performed. It is realized by controlling the reading and / or writing of the data in.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, a control function such as outputting a predetermined control signal to the shutter 70 in the control unit 60 may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module and data from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, a control function such as outputting a predetermined control signal to the shutter 70 in the control unit 60 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the same applies to other functional blocks. It may be realized. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted on one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (ElectricallyErasable Programmable ROM), and a RAM (Random Access Memory). You may. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing memory 1002 and / or storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be composed of a single bus or may be composed of different buses between the devices.

Further, the control unit 60 includes hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured, and some or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented on at least one of these hardware.

Although the present embodiment has been described in detail above, it is clear to those skilled in the art that the present embodiment is not limited to the embodiment described in the present specification. This embodiment can be implemented as an amendment or modification without departing from the spirit and scope of the present invention as determined by the description of the scope of claims. Therefore, the description of the present specification is for the purpose of illustration and does not have any limiting meaning to the present embodiment.

Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered Trademarks), GSM (Registered Trademarks), CDMA2000, UMB (Ultra Mobile Broad-band), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide) Band), Bluetooth®, and other systems that utilize suitable systems and / or extended next-generation systems based on them may be applied.

The processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present specification may be rearranged in order as long as there is no contradiction. For example, the methods described herein present elements of various steps in an exemplary order and are not limited to the particular order presented.

The input / output information and the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present specification may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, and the like may be transmitted and received via a transmission medium. For example, the software may use wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave to website, server, or other. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described herein and / or the terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings.

Further, the information, parameters, etc. described in the present specification may be represented by an absolute value, a relative value from a predetermined value, or another corresponding information. ..

User terminals may be mobile terminals, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobiles, depending on the trader. It may also be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

The terms "determining" and "determining" as used herein may include a wide variety of actions. "Judgment", "decision" is, for example, calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another). It may include searching in the data structure), considering that the confirmation (ascertaining) is "judgment" and "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision".

The phrase "based on" as used herein does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

As used herein by designations such as "first", "second", etc., any reference to that element does not generally limit the quantity or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

As long as "include", "including", and variations thereof are used herein or within the scope of the claims, these terms are similar to the term "comprising". In addition, it is intended to be inclusive. Moreover, the term "or" as used herein or in the claims is intended to be non-exclusive.

In the present specification, a plurality of devices shall be included unless the device has only one apparently in context or technically.

The entire disclosure is intended to include more than one, unless the context clearly indicates the singular.

1 ... Hologram exposure device, 10 ... Exposure section, 11 ... Hemispherical lens, 11a ... Curved section, 11b ... Plane section, 11x ... Plane area, 12 ... Hologram recording medium, 13 ... Object light lens, 14 ... Movement mechanism section, 20 ... Laser device, 40 ... Mirror, 60 ... Control unit, 70 ... Shutter.

Claims (4)

A hemispherical lens having a curved surface portion and a flat surface portion and having a plurality of planar regions formed on the curved surface portion.
A hologram recording medium arranged on the plane portion of the hemispherical lens and recording interference fringes by incident object light and reference light.
A laser device that emits laser light related to object light and reference light,
With a plurality of mirrors in which the object light emitted by the laser device and the laser light related to the reference light are vertically incident on the plurality of planar regions from different directions and reflected so as to reach the hologram recording medium. ,
A hologram exposure apparatus equipped with. A lens for object light for irradiating the laser beam related to the object light from the plane portion side of the hemispherical lens toward the hologram recording medium.
A moving mechanism unit that moves the position of the object light lens so that the selected one of the laser beams related to the reference light corresponds to the position of the object light lens.
Further prepare,
The hologram exposure apparatus according to claim 1. The hologram exposure apparatus according to claim 2, further comprising a shutter that blocks an optical path so that the laser beam related to the reference light is always one. The hologram exposure apparatus according to claim 2, wherein the laser apparatus emits a plurality of laser beams having different coherences from each other.

Images