JP7414670B2 - hologram exposure device - Google Patents

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

US Patent Application Publication No. 2020/0174255

In a method such as Patent Document 1, in order to enlarge the Eyebox, it is necessary to spread one light vertically and horizontally (radially) and duplicate it. For example, as shown in FIG. 5, the transmission hologram 500 radially spreads one incident reference beam, copies it, and transmits it to the reflection hologram 600 side. Such a transmission hologram 500 is created, for example, as shown in FIG. 6, by causing one reference beam to interfere with a plurality of object beams incident from different directions.

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

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 device that can suppress reflection and chromatic aberration of a plurality of lights incident from different directions. do.

A hologram exposure apparatus according to an aspect of the present disclosure includes a hemispherical lens having a curved surface part and a flat part, and in which a plurality of flat areas are formed in the curved surface part, and a hologram exposure apparatus disposed on the flat part of the hemispherical lens, and configured to absorb incident object light and A hologram recording medium that records interference fringes using a reference beam, a laser device that emits laser beams related to the object beam and the reference beam, and a laser beam related to the object beam and the reference beam emitted by the laser device from different directions. , a plurality of mirrors that are incident perpendicularly onto the plurality of plane areas and reflected so as to reach the hologram recording medium.

In the hologram exposure apparatus according to one aspect of the present disclosure, the laser beams related to the object light and the reference light enter the hemispherical lens and enter the hologram recording medium through the hemispherical lens, so that the hologram is recorded. It is possible to appropriately suppress reflection of the object beam and the reference beam on the hologram recording medium due to the refractive index difference between the medium and the air. In addition, in this hologram exposure apparatus, the laser beams related to the object beam and the reference beam emitted by the laser device are perpendicularly incident on the plurality of flat areas formed on the curved surface part of the hemispherical lens from mutually different directions. The light is reflected by a plurality of mirrors so as to reach the hologram recording medium placed on the flat surface of the hemispherical lens. According to such a configuration, the laser beams (parallel beams) related to the object beam and the reference beam always enter perpendicularly into the flat area formed on the curved surface of the hemispherical lens, so that the above-mentioned chromatic aberration is avoided. Not a problem. As described above, the hologram exposure apparatus according to one aspect of the present disclosure can suppress reflection and suppress the occurrence of chromatic aberration. According to such a configuration, it is possible to design the exposure optical system without separately considering the effects of chromatic aberration and refraction of light, thereby facilitating the design of the exposure optical system.

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

FIG. 1 is a schematic diagram showing the configuration of a hologram exposure device. FIG. 3 is a diagram showing an example of an optical path related to exposure of a transmission hologram. FIG. 3 is a diagram showing an example of an optical path related to exposure of a reflection hologram. It is a figure which shows the hemispherical lens based on a modification. It is a figure showing an example of the optical path concerning conventional Eyebox enlargement. FIG. 3 is a diagram showing an example of an optical path related to exposure of a conventional transmission hologram. FIG. 3 is a diagram showing an example of a hardware configuration of a control unit.

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 overlapping description will be omitted.

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

Each component of the hologram exposure apparatus 1 may be fixed by a three-story support member (for example, a pillar, a floor, a stand, a frame, etc.). In FIG. 1, the first and second floors of the hologram exposure apparatus 1 are shown as 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 referred to as the "X direction", and the short side direction of the first floor of the hologram exposure device 1 is referred to as the "Y direction", which is perpendicular to the X direction and the Y direction. The direction may be described as the "Z direction." Further, regarding the Z direction, vertically downward direction may be described as "downward" and vertically upward direction may be described as "upward."

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

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

The hemispherical lens 11 is arranged such that the curved portion 11a faces downward in the Z direction and the flat portion 11b faces upward in the Z direction. For example, the hemispherical lens 11 is arranged near the center of the hologram exposure device 1 so that the flat portion 11b is fixed to the third floor of the hologram exposure device 1 and the curved 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 placed on the flat part 11b of the hemispherical lens 11, and records interference fringes using the incident object light and reference light. The hologram recording medium 12 is, for example, a dry plate or film for use in transmission holograms or reflection holograms. Hologram recording medium 12 has one surface and the other surface. One surface is the surface that is closer to (contacts) the flat portion 11b of the hemispherical lens 11 when the hologram recording medium 12 is placed on the flat portion 11b. The other surface is the surface that is farther away from the flat portion 11b of the hemispherical lens 11 when the hologram recording medium 12 is placed on the flat portion 11b. A transmission hologram is created by causing object light and reference light to interfere with each other from the same surface (for example, one surface) of the hologram recording medium 12. A reflection hologram is created by causing reference light and 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 more. By using the same number of laser devices 20 as the number of object beams, the laser device 20 may emit a plurality of laser beams having different coherences. When using a plurality of laser devices 20, it is necessary to use the same laser device for the object beam and the corresponding reference beam. Laser device 20 is arranged on the first floor of hologram exposure device 1 .

The beam splitter 30 splits the laser beams emitted by the laser device 20, which are the object beam and the reference beam, into a plurality of beams. The beam splitter 30 is configured by, for example, a combination of a plurality of half mirrors, mirrors, and the like. The laser beam emitted by the laser device 20 is perpendicularly incident on the beam splitter 30 . For example, the beam splitter 30 divides the incident laser light into four parts in mutually orthogonal directions (X direction and Y direction). The number of divisions of the laser beam is not limited. Beam splitter 30 is arranged at the center of the first floor of hologram exposure apparatus 1 .

The plurality of mirrors 40 reflect the laser beams related to the object beam and the reference beam emitted by the laser device 20 so that they are perpendicularly incident on the plurality of plane areas 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 and second floors of the hologram exposure apparatus 1, respectively. In this way, by aligning the heights of the plurality of mirrors 40a, 40b, and 40c arranged on the first, second, and third floors of the hologram exposure apparatus 1, adjustment in the Z direction is possible when adjusting the optical axis. It becomes simple. Further, in order to adjust the optical axis, it is necessary to reflect the light by two or more mirrors, but in this embodiment, the plurality of mirrors 40a, 40b, and 40c are not all located at the same level, but at each level of the hologram exposure apparatus 1. placed separately. This ensures that each tier has sufficient space for arranging multiple mirrors. The multiple mirrors 40b are arranged above the multiple 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 laser beams related to the object beam and the reference beam to the hemispherical lens 11. In FIG. 1 , a laser device 20 emits laser light toward a beam splitter 30 . The beam splitter 30 divides the laser beam emitted by the laser device 20 into four parts in mutually orthogonal directions (X direction and Y direction). A plurality of mirrors 40a, each provided at a position corresponding to the laser beam divided into four parts, transmits the laser beams related to the object beam and reference beam divided by the beam splitter 30 to a plurality of mirrors 40b (on the third floor of the hologram exposure apparatus 1). ). That is, each mirror 40a and each mirror 40b have a one-to-one correspondence, and each mirror 40a reflects the laser beam toward the corresponding mirror 40b. The plural mirrors 40b reflect the laser beams reflected by the plural mirrors 40a toward the plural 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 the laser beam toward the corresponding mirror 40c. The plurality of mirrors 40c reflect the laser beams reflected by the plurality of mirrors 40b toward the hemispherical lens 11.

The spatial filter 50 removes interference fringes from the incident light and emits noise-free shaped parallel light. The spatial filter 50 is configured by, for example, a combination of a condensing lens, a pinhole, a collimating lens, and the like. The spatial filter 50 is arranged between the multiple mirrors 40a and the multiple mirrors 40b. The spatial filter 50 allows laser beams related to the object light and reference light that are incident from the side of the plurality of mirrors 40a to pass through the interior of the spatial filter 50 and output to the side of the plurality of mirrors 40c. Although only one spatial filter 50 is shown in FIG. 1, for example, the spatial filter 50 may be placed on each optical path of the laser beams related to the object beam and the reference beam split 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 laser beams related to a plurality of object beams and laser beams related to one reference beam are perpendicularly incident on a plurality of plane regions 11x of the hemispherical lens 11 from different directions. The laser beams related to the object beam and the reference beam travel inside the hemispherical lens 11 without being refracted, are concentrated at the center of the flat portion 11b of the hemispherical lens 11, and reach the hologram recording medium 12. As shown in FIG. 2, a plurality of object beams and one reference beam reach one surface of the hologram recording medium 12 and interfere with each other, whereby 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 reflection hologram. FIG. 3 shows that laser beams related to a plurality of reference beams are perpendicularly incident on a plurality of flat areas 11x of the hemispherical lens 11 from mutually different directions. The exposure section 10 further includes an object light lens 13 and a moving mechanism section 14. The hologram exposure apparatus 1 further includes a control section 60 and a shutter 70.

The object light lens 13 is a lens for irradiating a laser beam related to the object light toward the hologram recording medium 12 from the flat portion 11b side of the hemispherical lens 11. The object light lens 13 is arranged above the flat part 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. The moving mechanism section 14 may move the position of the object light lens 13 in the X direction and the Y direction, for example, in accordance with a control signal from the control section 60.

The control unit 60 is a circuit that performs various controls. The control unit 60 transmits a control signal to the shutter 70 to control the operation of the shutter 70. The control section 60 transmits a control signal to the moving mechanism section 14 to control the operation of the moving mechanism section 14 . For example, the control unit 60 controls the operation of the shutter 70 so that a selected one of the laser beams related to the reference beam passes, and also controls the position of the selected one of the reference beams and the object beam lens 13. The operation of the moving mechanism section 14 may be controlled in a one-to-one correspondence.

The shutter 70 is disposed on the optical path of the laser beams related to the object beam and the reference beam, and controls passing or blocking of the laser beams by opening and closing operations 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. In FIG. 3, only one shutter 70 is shown, but the shutter 70 may be arranged on each optical path of the laser light related to the object light and the reference light. The shutter 70 operates, for example, to allow all laser beams related to the object light and reference light to pass through, to block all laser beams related to the object light and reference light, or to individually block laser beams related to the object light and reference light. Perform actions, etc. For example, the shutter 70 blocks the optical path so that there is always one laser beam related to the reference beam.

Next, the effects of the hologram exposure apparatus 1 according to this embodiment will be explained.

The hologram exposure apparatus 1 according to the present embodiment includes a hemispherical lens 11 having a curved surface part 11a and a flat part 11b, and a plurality of flat areas 11x formed in the curved surface part 11a, and a hemispherical lens 11 arranged on the flat part 11b of the hemispherical lens 11. , a hologram recording medium 12 that records interference fringes with the incident object light and reference light; a laser device 20 that emits laser light related to the object light and reference light; The laser beam is perpendicularly incident on the plurality of plane areas 11x from mutually different directions, and includes a plurality of mirrors 40 that reflect the laser beams so as to reach the hologram recording medium 12.

In the hologram exposure apparatus 1 according to the present embodiment, the laser beams related to the object beam and the reference beam enter the hemispherical lens 11 and enter the hologram recording medium 12 through the hemispherical lens 11 no matter how many times. It is possible to appropriately suppress reflection of the object beam and the reference beam on the hologram recording medium 12 due to the difference in refractive index between the hologram recording medium 12 and the air. Further, in the present hologram exposure apparatus 1, the laser beams related to the object beam and the reference beam emitted by the laser device 20 are perpendicular to the plurality of flat regions 11x formed on the curved surface portion 11a of the hemispherical lens 11 from different directions. The light is reflected by the plurality of mirrors 40 so as to reach the hologram recording medium 12 arranged on the flat part 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 always enters the flat area 11x formed on the curved surface portion 11a of the hemispherical lens 11 perpendicularly, so that the above-mentioned chromatic aberration is not a problem. As described above, the hologram exposure apparatus 1 according to the present embodiment can suppress reflection and also suppress the occurrence of chromatic aberration. According to such a configuration, it is possible to design the exposure optical system without separately considering the effects of chromatic aberration and refraction of light, thereby facilitating the design of the exposure optical system.

The hologram exposure apparatus 1 according to the present embodiment includes an object light lens 13 for irradiating a laser beam related to the object light toward the hologram recording medium 12 from the flat portion 11b side of the hemispherical lens 11, and a laser beam related to the reference light. The camera may further include a moving mechanism section 14 that moves the position of the object light lens 13 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 laser beam related to the object beam is irradiated onto the hologram recording medium 12 from the side of the flat part 11b of the hemispherical lens 11, and the reference beam is emitted from the plurality of flat areas 11x of the curved part 11a of the hemispherical lens 11. The laser beam is incident and reaches the hologram recording medium 12. As a result, the object light incident from the plane portion 11b side of the hemispherical lens 11 and the reference beam incident from the plurality of plane regions 11x of the curved surface portion 11a of the hemispherical lens 11 interfere with each other, and the hologram recording medium 12 is prevented from being exposed. can. Further, by moving the object beam lens 13 in accordance with the selected one of the laser beams related to the reference beam, the reproduction position of the object beam corresponding to the incident angle of each reference beam is set on the hologram recording medium 12. recorded. In such a configuration, if 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 may be 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 there is always one laser beam related to the reference beam. According to such a configuration, the laser beam related to the object beam is irradiated onto the hologram recording medium 12 from the side of the flat part 11b of the hemispherical lens 11, and the laser beam of the plurality of flat areas 11x of the curved part 11a of the hemispherical lens 11 is A laser beam related to one reference beam enters from one plane area 11x and reaches the hologram recording medium 12. Thereby, the hologram recording medium 12 can be exposed while separating the reference beams independently.

In the hologram exposure apparatus 1 according to the present embodiment, the laser device 20 may emit a plurality of laser beams having different coherences. 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 multiple holograms are formed overlappingly at similar positions, the coherence differs from each other, so the corresponding reference light and object light interfere individually, and each interference fringe becomes a hologram. It is recorded on the recording medium 12. Thereby, the hologram recording medium 12 can be exposed at once without adjusting the interference timing of the reference beams while separating the reference beams independently.

[Modified example]
The detailed description has been made above based on the embodiments of the present disclosure. However, the present disclosure is not limited to the above embodiments. Various modifications can be made to the present disclosure without departing from the gist thereof.

In the embodiment, it has been explained that the plurality of flat 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 the plurality of flat regions 11x of the hemispherical lens 11 may be formed by combining a hemispherical lens and a plano-concave lens. You can. 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. 4(b) shows that the curved surface portion 110a of the hemispherical lens 110 and the concave surface of the plano-concave lens 111 are bonded to each other. Although only one plano-concave lens 111 is shown in FIG. 4, plano-concave lenses 111 may be bonded in correspondence to the number of the plurality of plane regions 11x. According to such a configuration, the plane of the plano-concave lens 111 corresponds to the plurality of plane regions 11x of the hemispherical lens 11. Thereby, the regions corresponding to the plurality of plane regions 11x of the hemispherical lens 11 can be easily formed without cutting off the hemispherical lens 110.

Finally, the hardware configuration of the control section 60 included in the hologram exposure apparatus 1 will be explained with reference to FIG. 7. The above-mentioned 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 addition, in the following description, the word "apparatus" can be read as a circuit, a device, a unit, etc. 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 without including some of the devices.

Each function in the control unit 60 is performed by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations, performs communication by the communication device 1004, and controls the memory 1002 and storage 1003. This is realized by controlling reading and/or writing of data in.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic device, registers, 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 implemented by the processor 1001.

Further, the processor 1001 reads programs (program codes), software modules, and data from the storage 1003 and/or the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments 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. May be realized. Although the various processes described above have been described as being executed by one processor 1001, they may be executed by two or more processors 1001 simultaneously or sequentially. Processor 1001 may be implemented with one or more chips. Note that the program may be transmitted from a network via a telecommunications line.

The memory 1002 is a computer-readable recording medium, and includes at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. You can. Memory 1002 may be called a register, cache, main memory, or the like. The memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (such as a compact disk, a digital versatile disk, or a Blu-ray disk). (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc. Storage 1003 may also be called an auxiliary storage device. The storage medium mentioned above may be, for example, a database including memory 1002 and/or storage 1003, a server, or other suitable medium.

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, network controller, network card, communication module, or the like.

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that 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 configured as a single bus or may be configured as different buses between devices.

Further, the control unit 60 includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). A part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented with at least one of these hardware.

Although this embodiment has been described in detail above, it is clear for those skilled in the art that this embodiment is not limited to the embodiment described in this specification. This embodiment can be implemented as modifications and changes without departing from the spirit and scope of the present invention as defined by the claims. Therefore, the description in this specification is for the purpose of illustrative explanation and does not have any restrictive meaning with respect to this embodiment.

Each aspect/embodiment described herein applies to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broad-band), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide) The present invention may be applied to systems utilizing Bluetooth (registered trademark), Bluetooth (registered trademark), and other appropriate systems, and/or next-generation systems expanded based on these.

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

The input/output information may be stored in a specific location (eg, memory) or may be managed in a management table. Information etc. to be input/output may be overwritten, updated, or additionally written. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.

Judgment may be made using a value expressed by 1 bit (0 or 1), a truth value (Boolean: true or false), or a comparison of numerical values (for example, a predetermined value). (comparison with a value).

Each aspect/embodiment described in this specification may be used alone, may be used in combination, or may be switched and used in accordance with execution. In addition, notification of prescribed information (for example, notification of "X") is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, etc. may be sent and received via a transmission medium. For example, if the software uses wired technologies such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and/or wireless technologies such as infrared, radio and microwave to 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 technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of

Note that terms explained in this specification and/or terms necessary for understanding this specification may be replaced with terms having the same or similar meanings.

Further, the information, parameters, etc. described in this specification may be expressed as absolute values, relative values from a predetermined value, or other corresponding information. .

A user terminal is defined by a person skilled in the art as a mobile terminal, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile It may also be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

As used herein, the terms "determining" and "determining" may encompass a wide variety of operations. "Judgment" and "determination" are, for example, calculating, computing, processing, deriving, investigating, looking up (e.g., Searching in data structures), and regarding confirmation (ascertaining) as ``judgment'' or ``decision''. In addition, "judgment" and "decision" refer to receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and access. (accessing) (e.g., accessing data in memory) may include considering something as a "judgment" or "decision." In addition, "judgment" and "decision" refer to resolving, selecting, choosing, establishing, comparing, etc. as "judgment" and "decision". may be included. In other words, "judgment" and "decision" may include regarding some action as having been "judged" or "determined."

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

Any reference to the elements herein, such as "first", "second", etc., does not generally limit the amount or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed therein or that the first element must precede the second element in any way.

To the extent that the words "include," "including," and variations thereof are used in this specification or in the claims, these terms are synonymous with the term "comprising." is intended to be comprehensive. Furthermore, the term "or" as used in this specification or in the claims is not intended to be exclusive or.

In this specification, a plurality of devices is also included unless it is clear from the context or technology that only one device exists.

Throughout this disclosure, the plural is intended to be included unless the context clearly dictates otherwise.

DESCRIPTION OF SYMBOLS 1... Hologram exposure device, 10... Exposure part, 11... Hemispherical lens, 11a... Curved surface part, 11b... Planar part, 11x... Planar area, 12... Hologram recording medium, 13... Lens for object light, 14... Movement mechanism part, 20...Laser device, 40...Mirror, 60...Control unit, 70...Shutter.

Claims (4)

a hemispherical lens having a curved surface portion and a flat portion, and a plurality of flat regions formed in the curved surface portion;
a hologram recording medium disposed on the flat part of the hemispherical lens and recording interference fringes by the incident object light and reference light;
a laser device that emits laser light related to object light and reference light;
a plurality of mirrors configured to reflect the laser beams, which are object beams and reference beams emitted by the laser device, perpendicularly to the plurality of plane areas from different directions and reach the hologram recording medium; ,
A hologram exposure device comprising: a hemispherical lens having a curved surface portion and a flat portion, and a plurality of flat regions formed in the curved surface portion;
a hologram recording medium disposed on the plane portion and recording interference fringes by the incident object beam and reference beam;
a laser device that emits laser light related to object light and reference light;
a plurality of mirrors that reflect a laser beam related to the reference beam perpendicularly to the plurality of plane areas and reach the hologram recording medium;
an object light lens for irradiating a laser beam related to the object light toward the hologram recording medium from the plane side;
a moving mechanism unit that moves the position of the object light lens so that the laser beam related to the reference light and the position of the object light lens correspond one-to-one ;
A hologram exposure device comprising : a beam splitter that splits the laser beam;
The beam splitter is placed between the beam splitter and the plurality of mirrors on the respective optical paths of the laser beams related to the divided reference beam, and is opened and closed on the optical path of each of the plurality of planar areas. further comprising a shutter that makes the laser light related to the reference light enter one plane area ;
A hologram exposure apparatus according to claim 2. 3. The hologram exposure apparatus according to claim 2, wherein the laser device emits a plurality of laser beams having mutually different coherences.

Images