KR20170069769A - Hologram printing apparatus for recording of holographic elements images tiling multiple spatial light modulator - Google Patents

Abstract

A hologram recording apparatus for recording hologram element images by tiling a plurality of spatial light modulators is disclosed.
The hologram recording apparatus includes a plurality of spatial light modulators (SLM) for outputting a signal beam modulated with a hologram element image; Reflectors for reflecting the signal beam output by each of the spatial light modulators to a tiling machine; And a tilting unit including total reflection prisms reflecting and reflecting a plurality of signal beams reflected by the reflectors in a direction in which the hologram film is positioned.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hologram recording apparatus for recording hologram element images by tiling a plurality of spatial light modulators,

The present invention relates to an apparatus for recording a hologram by tiling a plurality of spatial light modulators (SLMs).

In order to use the digital recording method of recording hologram on a hologram film, the hologram element image must be displayed on a spatial light modulator (SLM).

Therefore, the resolution and size of the hologram recorded by the hologram element image can be determined according to the size of the spatial light modulator. However, since the size of the spatial light modulator is limited, it is difficult to generate a hologram image larger than the size of the spatial light modulator according to the constraint.

Therefore, there is a demand for an apparatus capable of increasing the resolution and size of the hologram according to the size limitation of the spatial light modulator.

The present invention can provide an apparatus for increasing the resolution and size of a hologram that tiles a plurality of spatial light modulators to record in a hologram film.

A hologram recording apparatus according to an embodiment of the present invention includes a plurality of spatial light modulators (SLMs) for outputting a signal beam modulated with a hologram element image; Reflectors for reflecting the signal beam output by each of the spatial light modulators to a tiling machine; And a tilting unit including total reflection prisms reflecting and reflecting a plurality of signal beams reflected by the reflectors in a direction in which the hologram film is positioned.

The hologram recording apparatus according to an embodiment of the present invention may further include filters for filtering each of the signal beams reflected by the reflectors before each of the signal beams is incident on the total reflection prism of the tiling machine.

The filters of the hologram recording apparatus according to an embodiment of the present invention may transmit a predetermined area of the signal beams reflected by the reflectors and filter the remaining area excluding the predetermined area.

The filters of the hologram recording apparatus according to an embodiment of the present invention may be arranged so that a predetermined order of the zero order beam, the first order diffracted beam, the second order diffracted beam, or the second order or higher order diffracted beams in the signal beam reflected by the reflectors The remaining diffracted beams except for the diffracted beam can be filtered.

The total reflection prisms of the hologram recording apparatus according to an embodiment of the present invention may correspond to each of the plurality of spatial light modulators provided at different positions.

The total reflection prisms of the hologram recording apparatus according to an embodiment of the present invention can reflect signal beams reflected from the reflectors in a direction to form a hologram by being output from each of the plurality of spatial light modulators provided at different positions have.

The reflectors of the hologram recording apparatus according to an exemplary embodiment of the present invention may be a total reflection prism that reflects a signal beam output from each of the spatial light modulators and transmitted through the lens in a direction in which the tiling unit is located.

A hologram recording apparatus according to an embodiment of the present invention includes a recording light source unit for dividing a source beam output from a light source into a first output beam and a second output beam and outputting the divided output beam; A reference beam generator for removing a distortion of the first output beam and controlling a size and a shape of the first output beam from which the distortion is removed to generate a reference beam; An object beam generator for generating an object beam by removing distortion of a second output beam; A plurality of object beam condensers for modulating an object beam with a hologram element image to output a signal beam; And an optical coupling unit optically tiling the signal beams output from the plurality of object beam condensing units with total reflection prisms to generate a hologram, wherein the divided signal beams are combined with each other by interfering with the reference beam, A pattern pattern can be formed.

The hologram recording apparatus according to an embodiment of the present invention may further include a film transfer unit for transferring the hologram film based on a position where signal beams tiled in the optical coupling unit are condensed.

The film transfer unit of the hologram recording apparatus according to an embodiment of the present invention can control the distance between the hologram film and the optical coupling unit according to the focal length of the lens for condensing signal beams tiled in the optical coupling unit.

The optical coupling unit of the hologram recording apparatus according to an embodiment of the present invention includes reflectors for reflecting a signal beam output from each of the object beam condensing units to a tiling unit; And a tilting unit including total reflection prisms reflecting and reflecting a plurality of signal beams reflected by the reflectors in a direction in which the hologram film is positioned.

The optical coupling portion of the hologram recording apparatus according to an embodiment of the present invention may further include filters for filtering each of the signal beams reflected by the reflectors before each of the signal beams is incident on the total reflection prism of the tiling machine .

According to an embodiment of the present invention, a plurality of spatial light modulators can be tiled with total reflection prisms to increase the resolution and size of holograms recorded on the holographic film.

1 is a view illustrating a hologram recording apparatus according to an embodiment of the present invention.
2 is a view showing an object beam condensing unit and an optical coupling unit included in the hologram recording apparatus.
3 is an example of an optical coupling unit according to an embodiment of the present invention.
4 is a three-dimensional structure of the optical coupling unit according to the first embodiment of the present invention.
5 is a three-dimensional structure of the optical coupling unit according to the second embodiment of the present invention.
6 is a view illustrating a state in which an object beam condensing unit and an optical coupling unit according to an embodiment of the present invention are disposed on a hologram film.
7 is a three-dimensional structure of an optical coupling unit according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts that are not described in the description have been omitted for the purpose of clearly illustrating the present invention.

In order to overcome the size limitation of the spatial light modulator, a plurality of spatial light modulators are spatially arranged and optically coupled to generate a hologram having a large resolution and a large size.

(M, M = 1,2,3,4,?, M) and the number of vertical pixels (N, N = 1,2,3, ..., N) the product of (M × N) of the case, the hologram recording device according to the invention a plurality of k, l (k = 1,2,3, .., k, l = 1,2,3, .., l) A digital hologram having a resolution and a size corresponding to a product of a horizontal resolution (k x M) and a vertical resolution ( l x N) (k x M x l x N) can be realized using a spatial light modulator of a spatial light modulator.

The hologram recording apparatus according to the present invention modifies and arranges a rectangular prism structure showing the total reflection phenomenon in order to maintain the output intensity of a signal output from the spatial light modulator at the same optical position and to position the spatial light modulator at the optically same position, The resolution and size can be doubled while minimizing loss of signal intensity output from the optical modulator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view illustrating a hologram recording apparatus according to an embodiment of the present invention.

1, a hologram recording apparatus 100 according to an exemplary embodiment of the present invention includes a recording light source 110, a reference beam generator 120, an object beam generator 130, an object beam collector 140, An optical coupling unit 150, a film transfer unit 160, and a control unit 170. [

The recording light source unit 110 may divide the source beam output from the light source into a first output beam and a second output beam and output the divided beam. At this time, the recording light source unit 110 may include a coherence light source such as a laser. For example, the recording light source unit 110 may be a light source. rust. A blue (Red / Green / Blue) laser can be used as a light source. Further, the type of laser used as the light source of the recording light source unit 110 may be a (CW: Continuous Wave) laser.

When the optical axes of the first output beam and the second output beam output from the reference beam generator 120 and the object beam generator 130 are a single optical axis, the write light source 110 may be a beam combiner, As enemies. rust. The source beam output from the blue laser may be combined into a single beam and then split into a first output beam and a second output beam. 2, the recording light source unit 110 has a plurality of recording light sources 110, rust. The source beam output from the blue laser can be divided independently.

The reference beam generator 120 may remove the distortion of the first output beam divided by the recording light source unit 110. The reference beam generator 120 may generate a reference beam by controlling the size and shape of the first output beam from which the distortion is removed.

At this time, the reference beam generator 120 controls the size of the first output beam from which the distortion is removed by at least one mirror, the wave plate, and the polarizer, or controls the size of the first output beam from which the distortion is removed by the relay lens can do. Also, the reference beam generator 120 may use an aperture to control the shape of the first output beam from which the distortion is removed.

The object beam generating unit 130 may generate an object beam that is a collimated beam from which distortion is removed from the first output beam output from the recording light source unit 110. [

At this time, the object beam generator 130 may generate the object beam by removing the distortion of the first output beam by the beam expander, the spatial filter, and the microlens array. In addition, the object beam generator 130 may include a neutral density filter, a wave plate, and a polarizer for adjusting the intensity of the generated object beam.

The object beam condensing units 140 may output the signal beam by modulating the object beam generated by the object beam generating unit 130 with the hologram element image provided by the controller 170. [ The object beam condensing units 140 may condense the signal beam and enter the hologram film.

At this time, the signal beam incident on the hologram film by the object beam condensing unit 140 forms an interference fringe pattern by interference with the reference beam incident on the hologram film by the reference beam generator 120, Can be recorded.

The object beam condensing units 140 may correspond to the object beams output by the object beam generating unit 130, respectively. Each of the object beam condensing units 140 may include a spatial light modulator (SLM), a relay lens, and a condenser lens.

At this time, the object beam condenser 140 may include one of a reflection-type spatial light modulator and a transmission-type spatial light modulator. When the object beam condensing unit 140 includes a reflective spatial light modulator, the object beam condensing unit 140 may be a polarizing beam splitter (not shown) for inputting the object beam output from the object beam generating unit 130 into the spatial light modulator PBS: Polarized Beam Splitter).

Specifically, the spatial light modulator may display the hologram element image received from the control unit 170 on the display. At this time, the object beam incident on the spatial light modulator may be modulated and reflected according to the hologram element image displayed on the display. At this time, the signal beam, which is the object beam that is modulated and reflected on the display, can advance in the direction of the holographic film. For example, the signal beam may be a modulated object beam having the intensity of each pixel of the hologram element image.

When the object beam condensing unit 140 includes a transmissive spatial light modulator, the object beam output by the object beam generating unit 130 is modulated into a signal beam while passing through the spatial light modulator, May be incident on the relay lens.

Specifically, the spatial light modulator can display the hologram element image received from the control unit 170 on a transparent display through which the object beam can pass. At this time, the object beam output by the object beam generating unit 130 may be modulated according to the hologram element image displayed on the transparent display while transmitting the transparent display of the spatial light modulator.

And, the relay lens can control the size of the signal beam which is the modulated object beam in the spatial light modulator. At this time, the size of the signal beam may be the size of the diameter of the signal beam. For example, when recording a hologram element having a size of 1 mm x 1 mm on a hologram film, the size of the signal beam incident on the hologram film surface should be 1 mm x 1 mm. However, the size of the signal beam output by the spatial light modulator may not be 1 mm x 1 mm. Therefore, the relay lens can control the size of the signal beam output by the spatial light modulator according to the size of the hologram element.

At this time, the type of the relay lens can be determined according to the size of the hologram element to be recorded in the hologram film and the size of the signal beam output from the spatial light modulator.

For example, when the size of the hologram element is smaller than the size of the signal beam output by the spatial light modulator, the object beam condenser 140 may include a relay lens that reduces the size of the signal beam. Also, when the size of the hologram element is larger than the size of the signal beam output by the spatial light modulator, the object beam condenser 140 may include a relay lens for increasing the size of the signal beam.

In addition, the signal beam input to the relay lens can be prevented from distortion due to a change in size only when it is parallel light having no distortion.

The condensing lens receives the signal beam whose size is controlled by the relay lens, and allows the input signal beam to be incident on the optical coupling unit 150.

The optical coupling unit 150 may include a plurality of total reflection prisms corresponding to the plurality of object beam condensing units 140. The optical coupling unit 150 may tile the signal beams incident from the plurality of object beam condensing units 140 by an optical method and enter the hologram film. Specifically, the optical coupling unit 150 may condense the signal beam output from the plurality of spatial light modulators using the plurality of prisms, the optical lens, and the optical filter, and may enter the hologram film. At this time, the tiling may be a technique of spatially filling signal beams output from different spatial light modulators without crossing or overlapping.

The optical coupling unit 150 can form a digital hologram having a high resolution and a large image size, which is difficult to realize with one spatial light modulator by tiling the signal beams incident from the plurality of object beam condensing units 140 .

The film transferring unit 160 can transfer the hologram film to a position where the optical coupling unit 150 is disposed. At this time, the film transfer unit 160 can transfer the hologram film within a range where the optical coupling unit 150 does not deviate from the divided area.

Specifically, the film transfer unit 160 can transfer the fixed hologram film to the position where the optical coupling unit 150 is disposed, and includes at least one or more transfer motors for transferring the hologram film can do.

At this time, since the hologram element image is two-dimensionally recorded on the hologram film, the film transfer unit 160 may include the X-axis and Y-axis motors in general. When the height of the film transfer unit 160 is adjusted to control the distance between the hologram film and the optical coupling unit 150, the film transfer unit 160 may further include a Z-axis motor.

The method of transferring the hologram film by the film transfer unit 160 may be one of a step method, a roll-fed method, and a scanning method.

The control unit 170 may control operations of the recording light source unit 110, the reference beam generator 120, the object beam generator 130, the object beam condenser 140, and the film transfer unit 160.

For example, the control unit 170 may drive the recording light source unit 110 to output the second output beam and the first output beam to the reference beam generator 120 and the object beam generator 130, respectively. At this time, the controller 170 controls the optical shutter to control the amount of exposure of the object beam and the reference beam.

In addition, the controller 170 may transmit the hologram element image to the object beam condensing units 140. At this time, the object beam condenser 140 outputs the hologram element image received from the controller 170 to a spatial light modulator (SLM), and outputs the object beam generated by the object beam generator 130 to the spatial light modulator By outputting to the modulator, the object beam can be modulated.

The control unit 170 may control the motor of the film transfer unit 160 to transfer the holographic film to the position of the object beam condensing unit 140. In addition, the control unit 170 may additionally include a control function for controlling the optical component and capturing the beam.

The hologram recording apparatus 100 can tile a plurality of spatial light modulators (SLMs) by an optical method using a total reflection prism to form a digital hologram image having increased resolution and size in a hologram film have.

Specifically, the hologram recording apparatus 100 increases the light efficiency by tilting the signal beam output from the spatial light modulator by using a total reflection prism having high transmission efficiency, and precisely controls the optical position of the spatial light modulators to tile .

2 is a view showing an object beam condensing unit and an optical coupling unit included in the hologram recording apparatus.

The spatial light modulator (SLM) of the first object beam condensing unit 210 may display the hologram element images received from the control unit 170 to the LCoS 211. At this time, the first object beam incident on the LCoS 211 of the spatial light modulator (SLM) of the first object beam condensing unit 210 may be modulated according to the hologram element image displayed on the LCoS 211. The spatial light modulator (SLM) of the first object beam condensing unit 210 may output a first signal beam which is a first object beam modulated in accordance with the hologram element image in the LCoS 211. [

Next, the relay lens 212 can increase or decrease the size of the signal beam output by the spatial light modulator (SLM) according to the size of the predetermined hologram element.

Finally, the condenser lens 213 can cause the relay lens 212 to enter the optical coupler 150 with the first signal beam whose size is increased or decreased.

In addition, the spatial light modulator (SLM) of the second object beam condensing unit 220 may display the hologram element images received from the control unit 170 to the LCoS 221. At this time, the second object beam incident on the LCoS 221 can be modulated in accordance with the hologram element image displayed on the LCoS 221. The spatial light modulator (SLM) of the second object beam condensing unit 220 can output a second signal beam, which is a second object beam modulated in accordance with the hologram element image, in the LCoS 221.

At this time, the spatial light modulator (SLM), the relay lens 222, and the condenser lens 223 of the second object beam condensing unit 220 are disposed in the spatial light modulator (SLM) of the first object beam condensing unit 210, The lens 2212, and the condenser lens 213 to be incident on the optical coupler 150 by controlling the second signal beam.

2, the optical coupling unit 150 includes a first object beam condensing unit 210 and a second object beam condensing unit 220. The first object beam condensing unit 210 and the second object beam condensing unit 220, The second object beam condensing unit 210, and the second object beam condensing unit 220 at intervals narrower than the arrangement interval of the second object beam condensing unit 220 and the second object beam condensing unit 220.

The specific configuration of the optical coupling unit 150 will be described in detail below with reference to FIGS. 3 to 5. FIG.

3 is an example of an optical coupling unit according to an embodiment of the present invention.

3 is an example of the configuration of an optical coupling unit for tiling the first signal beam and the second signal beam incident from the first object beam condensing unit 210 and the second object beam condensing unit 220. [

The optical coupling unit 150 includes reflectors 320 and 370 for reflecting the signal beam output from each of the spatial light modulators in a direction in which different spatial light modulators are installed. A tiling machine 340 including a total reflection prism for reflecting and tiling a plurality of signal beams reflected by the reflectors 320 and 370 in a direction in which the holographic film is positioned, The tilter 340 may include filters 330 and 380 that filter before being incident on the total reflection prism.

The first signal beam and the second signal beam may include a video signal including a general image and a diffraction signal according to a periodic structure of the ellipses. For example, the image signal may be a 0th order beam, and the diffraction signal may be diffracted 1st, 2nd, 3rd, 4th, ... beams of different orders.

The first signal beam incident from the first object beam condensing unit 210 may be transmitted through the first lens 310 and incident on the first reflector 320.

The first signal beam may be totally reflected at the hypotenuse of the total reflection prism, which is the first reflector 320, and may be incident on the tiling unit 340. The first signal beam incident on the tiling unit 340 may be totally reflected from the hypotenuse of the first total reflection prism 341 of the tiling unit 340 and may be incident on the second lens 350. The first signal beam incident on the second lens 350 is transmitted through the second lens 350 and is condensed at a position distant from the second lens 350 by the focal distance of the second lens 350 . The film transfer unit 160 controls the distance between the hologram film and the optical coupling unit 150 according to the focal length of the second lens 350 so that the first signal beam transmitted through the second lens 350 passes through the hologram film As shown in FIG.

In addition, the first filter 330 may filter the first signal beam before the first signal beam reflected by the first reflector 320 is incident on the tiling unit 340. At this time, the first filter 330 may transmit a predetermined region of the first signal beam reflected by the first reflector 320, and may filter the remaining region except for the predetermined region. For example, the first filter 330 may be a spatial filter that can select and transmit the order of light diffracted by the spatial light modulator of the first object beam condensing unit 210.

Specifically, the first filter 330 is formed by a first-order beam, a first-order diffracted beam, a second-order diffracted beam, or a second-order or higher order diffracted beam in the signal beam reflected by the first reflector 320, It is possible to filter the remaining diffracted beams.

The first filter 330 may be spaced apart from the first lens 310 by a focal length of the first lens 310. The first signal beam transmitted through the first lens 310 is reflected by the first reflector 320 and the first signal beam reflected by the first reflector 320 passes through the first filter 330 The position of the first filter 330 can be determined so that the sum of the distances from the first lens 310 to the first lens 310 is the focal length of the first lens 310. [

The second signal beam incident from the second object beam condensing unit 220 may be transmitted through the third lens 360 and incident on the second reflector 370.

At this time, the second signal beam may be totally reflected at the hypotenuse of the total reflection prism, which is the second reflector 370, and may be incident on the tiling machine 340. The second signal beam incident on the tiling device 340 may be totally reflected from the hypotenuse of the second total reflection prism 342 of the tiling device 340 and may be incident on the second lens 350.

In addition, the second filter 380 may filter the second signal beam before the second signal beam, which is totaled in the second reflector 370, is incident on the tiling machine 340. At this time, the second filter 380 may transmit a predetermined area of the second signal beam reflected by the second reflector 370, and may filter the remaining area excluding the predetermined area. For example, the second filter 380 may be a spatial filter that can select and transmit the order of light diffracted by the spatial light modulator of the second object beam condensing unit 220.

The second signal beam transmitted through the third lens 360 is reflected by the second reflector 370 and the second signal beam reflected by the second reflector 370 passes through the second filter 380, The position of the second filter 380 can be determined so that the sum of the distances from the first filter 380 to the second lens 380 is the focal length of the third lens 360. [

At this time, the number of pixels of the spatial light modulator of the first object beam condensing unit 210 and the spatial light modulator of the second object beam condensing unit 220 may be the same. Further, the focal lengths of the first lens 310, the second lens 350, and the third lens 360 may be the same.

In addition, the first filter 330 and the second filter 380 may be structured to pass the beam of the same diffraction order. For example, if the first filter 330 filters the remaining beams except for the first diffracted beam, the second filter 380 may also be a structure that filters the remaining beams except for the first diffracted beam.

4 is a three-dimensional structure of the optical coupling unit according to the first embodiment of the present invention.

4, the direction of the first signal beam and the second signal beam output from the second lens 350 may be different from that of the optical coupling unit 150, as shown in FIG. 4, according to the first embodiment of the present invention. The direction of the first signal beam and the direction of the second signal beam are the same.

The spatial light modulator (SLM) of the first object beam condensing unit 210 may output a first signal beam modulated by the first object beam according to the first hologram element image 410. At this time, the first signal beam may be transmitted through the first lens 310, reflected by the first reflector 320, and filtered by the first filter 330, as shown in FIG.

The first signal beam filtered by the first filter 330 may be reflected by the first total reflection prism 341 of the tiling unit 340 and may be incident on the second lens 350.

In addition, the spatial light modulator (SLM) of the second object beam condensing unit 220 may output a second signal beam modulated by the second object beam according to the second hologram element image 420. At this time, the second signal beam may be transmitted through the third lens 360, reflected by the second reflector 370, and filtered by the second filter 380, as shown in FIG.

The second signal beam filtered by the second filter 380 may be reflected by the second total reflection prism 342 of the tilter 340 and may be incident on the second lens 350.

At this time, the dotted lines shown in FIG. 4 may represent the primary ray of the first signal beam and the second signal beam.

The total reflection prism as the first reflector 320, the total reflection prism as the second reflector 370, the first total reflection prism 341 and the second total reflection prism 342 are formed as a right angle isosceles triangular prism Lt; / RTI > That is, the lower surface and the upper surface of the first reflector 320, the second reflector 370, the first total reflection prism 341, and the second total reflection prism 342 may have a right angle isoside shape and a side surface may have a square shape.

5 is a three-dimensional structure of the optical coupling unit according to the second embodiment of the present invention.

As shown in FIG. 5, the optical coupler 150 according to the second embodiment of the present invention is configured such that the directions of the first signal beam and the second signal beam output from the second lens 520 are different from that of the optical coupler 150, The direction of the first signal beam and the direction of the second signal beam incident on the first and second signal beams are different from each other.

The spatial light modulator (SLM) of the first object beam condensing unit 210 may output a first signal beam modulated by the first object beam according to the first hologram element image 501. At this time, the first signal beam may be transmitted through the first lens 310, reflected by the first reflector 320, and filtered by the first filter 330, as shown in FIG.

The first signal beam filtered by the first filter 330 may be reflected by the first total reflection prism 511 of the tiling machine 510 and may be incident on the second lens 520.

The spatial light modulator SLM of the second object beam condensing unit 220 may output a second signal beam modulated by the second object beam according to the second hologram element image 502. At this time, the second signal beam may be transmitted through the third lens 360, reflected by the second reflector 370, and filtered by the second filter 380, as shown in FIG.

The second signal beam filtered by the second filter 380 may be reflected by the second total reflection prism 512 of the tiling machine 510 and may be incident on the second lens 520.

5, the first total reflection prism 511 has a structure that reflects the first signal beam incident in the X-axis direction in the Z-axis direction, and the second total reflection prism 512 has a structure that reflects the first signal beam incident in the X- And reflects the second signal beam in the Z-axis direction. The first signal beam reflected by the first total reflection prism 511 and the second signal beam reflected by the second total reflection prism 512 are incident on the first total reflection prism 511 and the second total reflection prism 512 at positions And the second lens 520 may condense the tiled first signal beam and the second signal beam in the Z axis direction to form a hologram in the Z axis direction.

That is, the tiling machine 510 tiles the first signal beam output from the first object beam condensing unit 210 positioned in the Y-axis direction and the second signal beam output from the second object beam condensing unit 220 The hologram can be formed in a direction different from the traveling direction of the first signal beam output from the first object beam condensing unit 210. [

Further, the angle at which the tiling machine 510 reflects the first signal beam and the second signal beam may be set differently according to the embodiment. For example, in FIG. 5, the tiling machine 510 vertically reflects a first signal beam and a second signal beam incident in the horizontal direction. However, the tiling machine 510 may be configured such that the first signal beam and the second signal beam, which are incident in the horizontal direction according to the installation angles of the first total reflection prism 511 and the second total reflection prism 512, It can also be reflected at one of various angles. At this time, the second lens 520 coupled to the tiling machine 510 condenses the first signal beam and the second signal beam reflected by the tiling machine 510 in a direction in which the tiling machine 510 reflects them to form a hologram can do.

That is, the hologram recording apparatus 100 according to an embodiment of the present invention changes the installation angles of the first total reflection prism 511 and the second total reflection prism 512 of the tiling machine 510, 140 can be changed without changing the position and angle of the hologram.

6 is a view illustrating a state in which an object beam condensing unit and an optical coupling unit according to an embodiment of the present invention are disposed on a hologram film.

6, the hologram recording apparatus 100 according to an embodiment of the present invention includes a first object beam condensing unit 610, a second object beam condensing unit 620, a third object beam condensing unit 630, And the fourth object beam condensing unit 640 according to the hologram element image are condensed on the hologram film 600 by tilting the optical coupler 650 to generate the hologram.

At this time, the hologram generated in the holographic film 600 includes a first object beam condensing unit 610, a second object beam condensing unit 620, a third object beam condensing unit 630, a fourth object beam condensing unit 640 ), Or four times the resolution of the hologram that can be generated by each pixel.

The specific configuration of the optical coupling unit 650 will be described below in detail with reference to FIG.

7 is a three-dimensional structure of the optical coupling part according to the third embodiment of the present invention

The optical coupler 150 according to the third embodiment of the present invention is an embodiment of tiling four signal beams incident from four object beam condensers as shown in FIG.

The spatial light modulator SLM of the first object beam condensing unit 610 may output a first signal beam modulated by the first object beam according to the first hologram element image 701. [ At this time, the first signal beam may be transmitted through the first lens 711, reflected by the first reflector 712, and filtered by the first filter 713, as shown in FIG. The first signal beam filtered by the first filter 713 may be reflected by the first total reflection prism 751 of the tiling machine 750 and may be incident on the second lens 760.

Further, the spatial light modulator (SLM) of the second object beam condensing unit 620 may output a second signal beam modulating the second object beam according to the second hologram element image 702. At this time, the second signal beam may be transmitted through the second lens 721, reflected by the second reflector 722, and filtered by the second filter 723, as shown in FIG. The second signal beam filtered by the second filter 723 may be reflected by the second total reflection prism 752 of the tilter 750 and may be incident on the second lens 760.

The spatial light modulator SLM of the third object beam condensing unit 630 may output a third signal beam modulating the third object beam according to the third hologram element image 703. At this time, the third signal beam may be transmitted through the third lens 731 as shown in FIG. 7, reflected by the third reflector 732, and filtered by the third filter 733.

The third signal beam filtered by the third filter 733 may be reflected by the third total reflection prism 753 of the tilter 750 and may be incident on the second lens 760.

The spatial light modulator SLM of the fourth object beam condensing unit 640 may output a fourth signal beam modulated by the fourth object beam according to the fourth hologram element image 704. At this time, the fourth signal beam is transmitted through the fourth lens 741 as shown in FIG. 7, reflected by the fourth reflector 742, and filtered by the fourth filter 743.

The fourth signal beam filtered by the fourth filter 743 may be reflected by the fourth total reflection prism 754 of the tilter 750 and may be incident on the second lens 760.

7, the first total reflection prism 511, the second total reflection prism 521, the second total reflection prism 531, and the fourth total reflection prism 541 are arranged in the X- 1 signal beam, the second signal beam, the third signal beam, and the fourth signal beam in the Z-axis direction. The first signal beam reflected by the first total reflection prism 511, the second total reflection prism 521, the second total reflection prism 531 and the fourth total reflection prism 541, the second signal beam, Beam and the fourth signal beam are tiled according to the positions of the first total reflection prism 511, the second total reflection prism 521, the second total reflection prism 531 and the fourth total reflection prism 541, The second signal beam 520 may condense the tiled first signal beam, the second signal beam, the third signal beam, and the fourth signal beam in the Z axis direction to form a hologram in the Z axis direction.

7, the optical coupling unit 150 according to the third embodiment of the present invention includes a first object beam condensing unit 610, a second object beam condensing unit 620, a third object beam condensing unit 620, The first signal beam, the second signal beam, the third signal beam, and the fourth signal beam, which are respectively input from the light source unit 630 and the fourth object beam condensing unit 640, The fourth object beam condensing unit 610, the second object beam condensing unit 620, the third object beam condensing unit 630, and the fourth object beam condensing unit 640, The hinges can form a hologram.

The present invention can form a digital hologram having increased resolution and size in a hologram film by tiling a plurality of spatial light modulators (SLM) by an optical method using a total reflection prism.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: Hologram recording device
110: recording light source
120: Reference beam generator
130: Object beam generator
140: object beam concentrator
150: Optical coupling part
160: Film transfer part
170:

Claims (16)

A plurality of spatial light modulators (SLM) for outputting a signal beam modulated with the hologram element image;
Reflectors for reflecting the signal beam output by each of the spatial light modulators to a tiling machine; And
A tilting unit including a total reflection prism for reflecting a plurality of signal beams reflected by the reflectors in a direction in which the holographic film is positioned,
And the holographic recording medium. The method according to claim 1,
And filters each of the signal beams reflected by the reflectors before each of the signal beams is incident on the total reflection prism of the tiling machine
And a holographic recording medium. 3. The method of claim 2,
The filters,
And transmits a predetermined area of the signal beams reflected by the reflectors, and filters the remaining area excluding the predetermined area. 3. The method of claim 2,
The filters,
Order diffracted beam, a second-order diffracted beam, or a second-order or higher-order diffracted beam in the signal beam reflected by the reflectors. The method according to claim 1,
The total reflection prisms,
And a plurality of spatial light modulators provided at different positions. The method according to claim 1,
The total reflection prisms,
And reflects the signal beams reflected from the reflectors in a direction to form a hologram, output from each of the plurality of spatial light modulators installed at different positions. The method according to claim 1,
The reflectors,
Wherein the spatial light modulator reflects a signal beam output from each of the spatial light modulators and transmitted through the lens in a direction in which the tiling device is located. A recording light source unit for dividing the source beam outputted from the light source into a first output beam and a second output beam and outputting the split;
A reference beam generator for removing a distortion of the first output beam and controlling a size and a shape of the first output beam from which the distortion is removed to generate a reference beam;
An object beam generator for generating an object beam by removing distortion of a second output beam;
A plurality of object beam condensers for modulating an object beam with a hologram element image to output a signal beam; And
An optical coupling unit for optically tilting signal beams output from the plurality of object beam condensing units by total reflection prisms to generate a hologram,
Lt; / RTI >
The divided signal beams are divided into a plurality of sub-
And forms an interference fringe pattern through interference with the reference beam. 9. The method of claim 8,
A film conveying unit for conveying the hologram film based on the position where the signal beams tiled in the optical coupling unit are condensed,
Further comprising: a holographic recording medium; 10. The method of claim 9,
The film transfer portion
Wherein the distance between the hologram film and the optical coupling section is controlled according to a focal length of a lens for condensing tiled signal beams in the optical coupling section. 9. The method of claim 8,
Wherein the optical coupling unit comprises:
Reflectors for reflecting the signal beam output from each of the object beam condensing units to a tiling unit; And
A tilting unit including a total reflection prism for reflecting a plurality of signal beams reflected by the reflectors in a direction in which the holographic film is positioned,
And the holographic recording medium. 12. The method of claim 11,
Wherein the optical coupling unit comprises:
And filters each of the signal beams reflected by the reflectors before each of the signal beams is incident on the total reflection prism of the tiling machine
And a holographic recording medium. 13. The method of claim 12,
The filters,
And transmits a predetermined area of the signal beams reflected by the reflectors, and filters the remaining area excluding the predetermined area. 13. The method of claim 12,
The filters,
Order diffracted beam, a second-order diffracted beam, or a second-order or higher-order diffracted beam in the signal beam reflected by the reflectors. 12. The method of claim 11,
The total reflection prisms,
And a plurality of spatial light modulators provided at different positions. 12. The method of claim 11,
The total reflection prisms,
And reflects the signal beams reflected from the reflectors in a direction in which the hologram film is placed, output from each of the plurality of spatial light modulators installed at different positions.

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