KR100256651B1 - Composite volume holographic digital storage/reproducing system - Google Patents

Abstract

PURPOSE: A composite volume holographic digital data storage/reproducing system is provided to reduce the required time for recording and reproducing data by simultaneously recording and reproducing the data in case that hologram data are stored in storage media, and the data are reproduced. CONSTITUTION: In case of a recording mode, a shutter(134) becomes in a cut-off condition under the control of a control signal of a system controller. In addition, a shutter(106) becomes in an open condition. A light vertically polarized which is generated from a light source(102) and diverged from a polarization light separator(104) is projected to a light separator(108) through an aperture of the shutter(106). The light separator(108) divides a light vertically polarized into a recording standard light and an object light. In case of a reproducing mode, a light horizontally polarized is reflected through an aperture of a shutter(134), and a reflecting mirror(138). The light is expanded through a beam expander(140), and transmitted to a reflecting mirror(142).

Description

Complex Volume Holographic Digital Storage and Playback System

The present invention relates to a volume holographic digital data storage / reproducing system, and more particularly to a recording operation for recording hologram data in a storage medium (e.g., an optical refractive crystal). A complex volume holographic digital storage and reproducing system suitable for simultaneously performing a reproducing operation for reproducing recorded data and for reproducing two hologram data simultaneously.

Recently, the field of technology using volume holographic digital data storage is being actively researched everywhere due to the remarkable development of semiconductor laser, charge coupled device (CCD), liquid crystal display (LCD), etc. As a result of this research, fingerprint recognition systems for storing and reproducing fingerprints have been put to practical use, and are being expanded to various fields that can apply the advantages of large capacity and ultra-fast data transfer rate.

The volume holographic digital storage and reproducing system as described above is a storage medium, for example, optically, which reacts to the intensity of the interference fringes by interference fringes generated when the object light from the target object and the reference light interfere with each other. By recording to a storage medium such as a refractive crystal, recording the intensity and phase of the object light by a method of changing the angle of the reference light, etc., it is possible to display a three-dimensional image of the object, Hundreds to thousands of holograms, organized in pages, can be stored in the same place.

FIG. 2 illustrates a typical conventional volume holographic digital storage for storing three-dimensional hologram data (ie, interference fringes) in a storage medium by using interference between object light and reference light, and reproducing three-dimensional hologram data stored in the storage medium. And an overall schematic of the regeneration system.

As shown in the drawing, a conventional volume holographic digital storage and reproducing system has a storage medium storing a light source 202 for generating laser light required in holography and a three-dimensional hologram data (i.e., interference fringes). 230 (eg, a photorefractive crystal), and between these light sources 202 and the storage medium 230 are two paths comprising respective optical systems, namely the reference light processing path PS1 and the object light processing path. PS2 is formed.

Referring to FIG. 2, the optical splitter 204 separates the incident laser light generated from the light source 202 into a reference light and an object light, wherein the split reference light is provided to the reference light processing path PS1 and branched. The object light is provided to the object light processing path PS2.

Next, on the reference light processing path PS1, a waste construction lens 206, a beam expander 207 of two lenses, and a reflecting mirror 208 are sequentially provided in the emission direction of the reference light, and the reference light processing path having such an optical structure. In PS1, reference light required for recording or reproducing hologram data is generated and provided to the storage medium 230.

That is, the reference light branched from the optical separator 204 is adjusted through the waste construction lens 206 and then expanded to a predetermined size through the beam expander 207, for example, the beam in the object light processing path PS2 described later. When expanded to a size sufficient to cover the size of the object light extending through the expander, this expanded reference light is transmitted to the reflector 208.

On the other hand, the reflector 208 deflects the reference light (beam) extended to a predetermined size through the beam expander 207 at a predetermined angle, for example, a recording angle during recording or a predetermined reproduction angle for reproduction. Reference light deflected at an angle or reproduction angle is provided to the storage medium 230.

At this time, the reference light used during recording or reproduction is controlled by rotating the reflector 208 to change the deflection angle θ each time binary data of each page unit is recorded. Hundreds to thousands of holograms can be stored or played back on the storage medium 230.

Here, the angle adjustment of the reflector 208 is performed by the motor 210 driven by the actuator 210, where the deflection angle θ of the reference light is an angle measuring device (for example, attached to a predetermined portion of the motor). , Encoder).

On the other hand, on the object light processing path PS2, a reimaging lens 214, a beam expander 216, a reflector 218, a beam expander 220 and a spatial light modulator 222 are sequentially provided in the emission direction of the object light. In addition, a field lens 224 and a Fourier lens 226 are sequentially provided between the spatial light modulator 222 and the storage medium 230. In the object light processing path PS2 having such an optical structure, In recording, the storage medium 230 stores signal light (modulated object light) obtained by modulating the object light in units of one page of light and dark binary data constituting pixels according to external input data applied to the spatial light modulator 222. To provide.

That is, the object light branched from the light separator 204 is reimaged through the reimaging lens 214 and firstly expanded to a predetermined size through the beam expander 216. 218 is reflected at a predetermined deflection angle. The primary extended object light reflected at the reflector 218 is then second extended through the beam expander 220 and then transmitted to the spatial light modulator 222 (eg, LCD).

At this time, extending the object light to a predetermined size through the two beam expanders 216 and 220 is sourced from the light source 202 to the laser light, the size of the object light branched through the light separator 204 is very small, the spatial light modulator 222 This is because it is inadequate to perform light modulation, and thus the object light is extended to a size corresponding to the size of the spatial light modulator 222 through this second-order expansion.

On the other hand, the spatial light modulator 222 modulates the extended object light transmitted from the beam expander 220 in units of one page of binary data of light and shade binary data formed by pixels according to data input from the outside. Is the image data in units of one frame of the image, the extended object light incident on the spatial light modulator 222 is modulated in units of one frame.

Then, the signal light modulated in units of one page of binary data output from the spatial light modulator 222 is adjusted to be suitable for storage in the storage medium 230 through the field lens 224 and the Fourier lens 226. Then, the light is incident on the storage medium 230 in synchronization with the reference light incident on the reflector 208 of the reference light processing path PS1.

Therefore, in the storage medium 230, in the recording mode, the signal light provided from the Fourier lens 226 is obtained through the interference between the recording reference light incident from the reflector 208 with the corresponding deflection angle θ. Interference fringes are recorded. That is, the light induced phenomenon of the kinetic charge occurs in the storage medium 230 according to the intensity of the interference fringe obtained by the interference between the signal light and the recording reference light. An interference fringe of the hologram data is recorded.

Further, in the storage medium 230, in the reproducing mode, the recorded interference fringe diffracts the reproducing reference light when the reproducing reference light is incident from the reflecting mirror 208 at a predetermined deflection angle [theta]. Demodulate one page of binary data (that is, a checkered pattern) composed of light and dark.

Therefore, in the reproducing mode, the image is reimaged through the reimaging lens 232 on a three-dimensional demodulated image in units of one page of binary data reproduced from the storage medium 230, and then CCD (Charge Coupled Device: 234) or the like. By irradiation, the original data, i.e., the electric signal, is restored. At this time, the reference light used to reproduce the data recorded in the storage medium 230 should be a reference light having substantially the same angle as the reference light applied when recording the hologram data in the storage medium 230.

On the other hand, in recent years, as a television for satisfying various needs of a user, for example, a composite TV with two tuners is being developed and spread. In such a composite TV with two tuners, the user has a single tuner. The user can tune and watch a desired broadcast channel, and can record another broadcast channel broadcasted at the same time through another tuner. In other words, when a user wants to watch a program of two broadcasting channels broadcasted at the same time, one TV program can watch one broadcast program while the other broadcast program is recorded and watched. It satisfies user needs.

Accordingly, in view of the above, if the holographic data recording and reproducing operation can be performed simultaneously in the volume holographic digital storage and reproducing system, or the two hologram data recorded on one storage medium can be reproduced simultaneously, the user can Convenience may be enhanced.

For example, assuming that there is hologram data to be recorded on the current storage medium and that there is hologram data to be played back on the same storage medium, the total requirements consumed for recording and playback of the data by having the playback performed simultaneously with recording It will save you a lot of time.

Further, considering that the signal processing speed of the CCD is very slow compared to the signal processing speed of the optical system due to its signal processing characteristics, it is possible to further improve the transmission rate of the reproduction output by simultaneously reproducing two hologram data.

However, in the conventional storage and reproducing system as described above, there is currently no consideration in terms of a technique for simultaneously recording and reproducing hologram data or reproducing two hologram data simultaneously.

Accordingly, the present invention has been made in view of the above points, and simultaneously records and reproduces hologram data in a storage medium using a vertically polarized recording reference light and a horizontally polarized reproduction reference light, and also one storage medium. It is an object of the present invention to provide a multi-volume holographic digital storage and reproducing system capable of simultaneously reproducing two hologram data recorded in the recording medium.

In order to achieve the above object, the present invention, by splitting the laser light generated from the light source into the reference light and the object light, and the target hologram data by interfering the branched reference light with the signal light obtained by the modulation between the branched object light and the input data A volume holographic digital storage and reproducing system for recording a recording medium into a storage medium, the volume holographic digital storage and reproducing system comprising: a polarizing light separator for generating a vertical polarizing beam for recording and a reproducing polarizing beam by vertically and horizontally polarizing laser light generated from the light source; A first shutter for selectively opening and closing the emission of the vertically polarized beam corresponding to the setting mode of the system; A second shutter for selectively opening and closing the emission of the horizontally polarized beam corresponding to the setting mode of the system; In a recording operation, the vertically polarized beam incident from the first shutter is branched into a reference light and an object light, and the signal having a predetermined deflection angle and a signal light generated through modulation between the branched object light and external input data. A predetermined polarized reference light is incident on the storage medium to record the desired hologram data in the storage medium, and during the reproduction operation, the branched object light is blocked and vertically deflected so that the branched first reference light is preset. A recording and reproducing system for reproducing the recorded hologram data which is incident on the storage medium at a deflection angle of? In the reproducing operation, the target hologram data recorded on the storage medium is reproduced by reflecting the horizontally polarized beam incident from the second shutter into the reference light for reproduction having a predetermined predetermined deflection angle and entering the storage medium. Regenerative system; A first reproducing output system for converting electrical signals from reproduced hologram data provided from said recording and reproducing system in a reproducing operation; And a second reproduction output system for converting reproduced hologram data provided from the reproduction system into an electrical signal during a reproduction operation.

1 is an overall schematic diagram of a complex volume holographic digital storage and playback system in accordance with a preferred embodiment of the present invention;

2 is an overall schematic diagram of a typical conventional volume holographic digital storage and playback system.

<Description of the code | symbol about the principal part of drawing>

102 light source 104 polarized light separator

106,117,134,152: Shutter 108,132: Optical Separator

110,136: waist configuration lens 112,120,124,140: beam expander

114,122,138,142: Reflector 116,144: Actuator

118, 148, 154: reimaging lens 126: spatial light modulator

128: field lens 130: Fourier lens

146: storage medium 150156: CCD

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 shows an overall schematic diagram of a complex volume holographic digital storage and playback system according to a preferred embodiment of the present invention.

As shown in the drawing, the most essential technical aspect of the present invention is to split the laser light generated from the light source into two reference lights, that is, to vertically polarize the laser light to generate a reference light for recording, and to horizontally polarize the laser light. A reference light for reproduction is generated, and the recording reference light generated therein is transmitted to a recording and reproducing system for recording and reproducing in hologram data, and the reproducing reference light is transmitted to a reproducing system newly constructed according to the present invention to obtain the hologram data. Is used for regeneration.

That is, in the present invention, when recording and reproducing hologram data are simultaneously performed, the recording reference light is vertically polarized and the reproduction reference light is horizontally polarized so that the two reference lights are orthogonal to each other, and when the storage medium simultaneously reproduces the two hologram data recorded thereon, respectively. By vertically polarizing the first reproducing reference light and horizontally polarizing the second reproducing reference light, the two reference lights are orthogonal to each other, so that two reference lights simultaneously incident do not cause mutual interference.

Here, the configuration of a recording and reproducing system for recording and reproducing hologram data is such that light is incident on the storage medium 146 and reflects the data reproduced on the storage medium 146 to the reimaging lens 148 on the output side. It is almost identical to the construction of the conventional storage and regeneration system described above, except that the separator 132 is disposed between the Fourier lens 130 and the storage medium 146.

The combined storage and reproducing system of the present invention simultaneously reproduces two hologram data recorded on a recording mode, a reproducing mode, a compound mode (i.e., a mode of simultaneously performing recording and reproducing), and a double reproducing mode (i.e., recording on one storage medium). Mode). In FIG. 1, P1 denotes a recording and reproduction system in which vertically polarized light is emitted, and P2 denotes a reproduction system in which horizontally polarized light is emitted.

Here, the recording and reproducing system P1 configured on the output side of the shutter 106 has a structure similar to the conventional system described above, that is, the shutter 117 is arranged on the object light output side of the optical separator 108, and the Fourier lens An optical separator 132 is disposed between the 130 and the storage medium 146, the shutter 117 blocks the emission of the object light in the double reproduction mode, and the optical separator 132 stores the signal light in the recording mode. The above-described configuration of the conventional system is applied except that the data is incident on the medium 146 and reflected in the reimaging lens 148 on the output side in the reproduction mode or the double reproduction mode. Almost the same.

In addition, the reproduction system P2 is a signal processing path newly added according to the present invention, and the shutter 134, the waste configuration lens 136, and the reflector in the direction in which the horizontally polarized light is emitted from the polarized light separator 104. 138, a two-lens beam expander 140 and a reflector 142 having an actuator 144, and this regeneration system P2 has a predetermined deflection angle in regeneration mode or double regeneration mode. Reproduction reference light is generated and incident on the storage medium 146.

Moreover, the composite storage and regeneration system of the present invention has two regeneration output systems, namely a regeneration output system consisting of an optical separator 132, a reimaging lens 148 and a CCD 150, and a shutter 152, reimaging A reproduction output system consisting of a lens 154 and a CCD 156 is provided, and these two reproduction output systems respectively output two reproduction data simultaneously reproduced from one storage medium in a double reproduction mode according to the present invention. Convert

Referring to FIG. 1, in the recording mode, the shutter 134 is turned off and the shutter 106 is opened in response to a control signal from a system controller (not shown). The vertically polarized light branched at the separator 104 enters the light separator 108 through the opening of the shutter 106.

In addition, the optical separator 108 separates the vertically polarized light into the recording reference light and the object light, wherein the divided reference light is provided to the reference light processing path PS1 and the branched object light is the object light processing path PS2. Is provided. At this time, the shutter 117 maintains an open state.

Therefore, as already described in detail in the above-described conventional system, between the reference light for recording reflected at the predetermined deflection angle θ1 in the reflector 114 and the extended object light reflected by the reflector 122 and external input data As signal light obtained through modulation is incident on the storage medium 146, the hologram data to be recorded is recorded in the storage medium 146.

On the other hand, in the regeneration mode, the shutter 106 is cut off and the shutter 134 is opened in accordance with a control signal from a system controller (not shown), which is generated from the light source 102 to generate the polarized light separator 104. The horizontally polarized light (that is, the reproduction reference light) branched at is reflected at an angle through the opening of the shutter 134 and the reflector 138, and the reflected reproduction reference light is a beam expander 140 having two lenses. It is expanded to a predetermined size through) and then transmitted to the reflector 142.

Next, the reflector 142 deflects and stores the reproduction reference light transmitted from the beam expander 140 at a predetermined reproduction angle (that is, the deflection angle of the recording reference light used when recording the hologram data to be reproduced at present). Enters the medium 146.

At this time, the reference light used at the time of reproduction is controlled by rotating the reflector 142 to change the deflection angle θ (angle overlapping recording technique) each time binary data of each page unit is recorded. Angle adjustment of 142 is performed by a motor driven by actuator 144.

As a result, in the storage medium 146, when the reproduction reference light is incident at a predetermined deflection angle θ, the recorded interference fringe diffracts the reproduction reference light to which the recorded interference fringe is incident, thereby generating one page of binary data composed of original pixel contrast. (I.e., checkerboard pattern), the reproduced data demodulated here is emitted to the optical separator 132 side and reflected to the reimaging lens 148.

Accordingly, the three-dimensional image demodulated in units of one page of binary data reflected by the optical separator 132 is reimaged through the reimaging lens 148 and then irradiated onto a CCD (Charge Coupled Device) 150, thereby providing original data. Is restored.

Next, a description will be given of a process of simultaneously performing recording and reproducing operations in a composite mode, which is one of the key technical aspects of the present invention.

First, when the system is set to the composite mode, both shutters 106 and 134 are opened according to control from a system controller not shown. Accordingly, the vertically polarized light (recording light) in the polarized light separator 104 enters the light separator 108 through the opening of the shutter 106, and the horizontally polarized light (reference light for reproduction) is shutter 134. The aperture and the waste configuration lens 136 are transferred to the reflector 138.

At this time, the process of recording the hologram data aiming for recording to the storage medium 146 by using the vertically polarized light incident to the optical separator 108 on the recording system P1 side is performed in the above-described recording mode of the present invention. The recorded hologram data aimed for reproduction in the storage medium 146 is substantially the same as the recording process of &lt; Desc / Clms Page number 12 &gt; The reproduction process is actually the same as the reproduction process in the reproduction mode of the present invention described above.

Therefore, in the above-described composite mode, in the storage medium 146, the hologram data is stored in the storage medium due to the interference between the vertically polarized recording reference light incident on the reflector 114 and the signal light incident on the optical separator 132 side. The target hologram data stored in the storage medium 146 is reproduced by the horizontally polarized reproducing reference light incident on the reflector 142 at the same time and is emitted to the optical separator 132.

At this time, the recording reference light incident from the reflector 114 to the storage medium 146 is vertically polarized light, and the reproduction reference light incident from the reflector 142 to the storage medium 146 is horizontally polarized light, that is, perpendicular to each other. Since it is light having a state, even when incident to the storage medium 146 at the same time, it acts independently (ie, recording and reproducing) without causing mutual interference. Therefore, in the present invention, this principle (i.e., orthogonality in the polarization direction) can be used to perform data reproduction simultaneously with data recording to the same storage medium.

Next, a description will be given of a process of simultaneously reproducing two hologram data recorded on the storage medium in the double reproducing mode, which is another essential technical aspect of the present invention.

First, when the system is set to the double regeneration mode, all three shutters 106, 134 and 152 are opened and the shutter 117 is shut off under control from a system controller (not shown). Thus, the vertically polarized light (recording light) in the polarized light separator 104 enters the light separator 108 through the opening of the shutter 106, and the horizontally polarized light (the second reference reference light) receives the shutter ( The aperture of 134 and the waste construction lens 136 are delivered to the reflector 138.

Next, the first reproduction reference light separated by the optical separator 108 is incident on the reflector 114 through the waste construction lens 110 and the beam expander 112, and the second recording light is reflected by the reflector 138. The reproduced light is extended to a predetermined size through the beam expander 140 and then incident to the reflector 142.

Next, the reflector 114 deflects the first reproduction reference light transmitted from the beam expander 112 to a predetermined reproduction angle (that is, the deflection angle of the recording reference light used when recording the hologram data to be reproduced at present). The second reference light transmitted from the beam expander 140 to the predetermined reproduction angle (i.e., to record the hologram data to be reproduced at present). Deflection angle of reference light) to enter the storage medium 146.

At this time, the angle adjustment of each reflector (114,142) is performed by a motor driven by each actuator (116,144).

As a result, the storage medium 146 diffracts the first reproduction reference light into which the recorded interference fringe corresponding to the hologram data intended for reproduction is incident upon the incidence of the first reproduction reference light at a predetermined deflection angle θ1. By demodulating the binary data of one page in the contrast of the pixel and exiting the reimaging lens 154 through the opening of the shutter 152, according to the incident of the second reproduction reference light at a predetermined deflection angle θ2. The recorded second interference fringe corresponding to the other hologram data to be reproduced is diffracted into one page of binary data of the contrast of the pixel by diffracting the incident second reference reference light and emitted to the optical separator 132 side.

At this time, the first reproduction reference light incident from the reflector 114 to the storage medium 146 is vertically polarized light, and the second reproduction reference light incident from the reflector 142 to the storage medium 146 is horizontally polarized light. That is, since the light having the orthogonal states to each other, even if incident to the storage medium 146 at the same time for the reproduction of each hologram data, they act independently (ie, separate playback) without causing interference with each other. Therefore, in the present invention, using this principle (i.e., orthogonality in the polarization direction), two hologram data can be simultaneously reproduced in the same storage medium.

Therefore, the three-dimensional image demodulated in units of one page of binary data emitted through the opening of the shutter 152 is reimaged through the reimaging lens 154 and then irradiated to the CCD 156 so that one reproduction hologram data is applied. The three-dimensional image, which is restored to the original data and simultaneously demodulated in units of one page of binary data reflected by the optical separator 132, is reimaged through the reimaging lens 148 and then irradiated to the CCD 150. The other reproduction hologram data is restored to the original data.

That is, two hologram data recorded in the storage medium are simultaneously reproduced and output through the respective CCDs 150 and 156.

As described above, according to the present invention, in the composite system, data recording and reproducing system and reproducing system are separately provided, and the vertically polarized light is used as the recording reference light in the composite mode in which recording and reproducing is performed at the same time. By simultaneously inputting the light into the storage medium for recording and reproducing the data as the reference light for reproduction, it is possible to realize the reproduction of the recorded hologram data aimed at the same time as the recording of the hologram data aimed at the recording.

In addition, the present invention provides the horizontally polarized light as the first reproducing reference light and the vertically flattened light as the second reproducing reference light in the double reproducing mode for simultaneously reproducing two hologram data recorded on the storage medium, respectively. By simultaneously entering each of the storage media for reproduction of data, it is possible to simultaneously realize reproduction of two recorded hologram data aimed at reproduction.

Therefore, in the present invention, when hologram data is recorded on the storage medium and the hologram data recorded on the same storage medium is to be reproduced, the time required for recording and reproducing the data can be greatly reduced by simultaneously recording and reproducing the data. Can be reduced.

Also, unlike the conventional method of reproducing hologram data using vertical polarization, the present invention implements reproduction of hologram data by using horizontal polarization with better diffraction efficiency of reproduction light, thereby reducing the The signal-to-noise ratio can be significantly reduced.

Furthermore, the present invention has two reproduction paths, and simultaneously reproduces and processes two hologram data, respectively, to greatly alleviate the bottleneck in the CCD, which is slower in signal processing speed than the optical system, thereby greatly reducing the data transfer rate of the reproduction output. Can be promoted.

In addition, the present invention can improve reliability of the entire system by providing two reproduction paths, so that when an abnormality occurs in one reproduction path, the normal reproduction mode can be performed through the other reproduction path. .

Claims (5)

Volume holographic digital for splitting the laser light generated from the light source into the reference light and the object light, interfering the signal light obtained by the modulation between the branched object light and the input data and the branched reference light to record the target hologram data in the storage medium In the storage and playback system, A polarized light separator for vertically and horizontally polarizing the laser light generated by the light source to generate a vertically polarized beam for recording and a horizontally polarized beam for reproduction; A first shutter for selectively opening and closing the emission of the vertically polarized beam corresponding to the setting mode of the system; A second shutter for selectively opening and closing the emission of the horizontally polarized beam corresponding to the setting mode of the system; In a recording operation, the vertically polarized beam incident from the first shutter is branched into a reference light and an object light, and the signal having a predetermined deflection angle and a signal light generated through modulation between the branched object light and external input data. The target polarized reference light is incident on the storage medium to record a target hologram data in the storage medium, and during the reproduction operation, the branched object light is blocked and the branched first reference light that is vertically deflected is predetermined. A recording and reproducing system for reproducing target recorded hologram data by entering the storage medium at a deflection angle; In the reproducing operation, the target hologram data recorded on the storage medium is reproduced by reflecting the horizontally polarized beam incident from the second shutter into the reference light for reproduction having a predetermined predetermined deflection angle and entering the storage medium. Regenerative system; A first reproducing output system for converting electrical signals from reproduced hologram data provided from said recording and reproducing system in a reproducing operation; And A multi-volume holographic digital storage and reproducing system comprising a reproducing output system for converting regenerated hologram data provided from the reproducing system into an electrical signal during a reproducing operation. The system of claim 1, wherein the recording line is: A first optical splitter for splitting the vertically polarized beam incident from the first shutter into a reference light for recording or reproduction and an object light; A third shutter which blocks the emission of the object light branched from the first optical splitter in the reproducing operation; A first reflector reflecting the branched recording or reproducing reference light at a predetermined deflection angle to enter the storage medium; A second reflector for reflecting the branched object light at a predetermined angle during a recording operation; A spatial light separator for modulating the reflected object light by the external input data to generate the signal light modulated by one page unit; And A second optical splitter that enters the generated signal light into the storage medium in synchronization with the recording reference light during a recording operation, and reflects the reproduction data provided from the storage medium to the second reproduction output system in a reproduction operation; Composite volume holographic digital storage and playback system, characterized in that consisting of. The system of claim 2, wherein the regeneration system is: A third reflector for firstly reflecting the horizontally polarized beam incident from the second shutter at a predetermined angle as the reproduction reference light; A beam expander for expanding the primary reflected reproduction reference light to a predetermined size; And And a fourth reflector reflecting the extended reproduction reference light at a predetermined predetermined deflection angle to enter the storage medium. The system of claim 2, wherein the first regenerative output system is: A fourth shutter for opening and closing the output from the storage medium according to each mode; A first reimaging lens for reimaging the reproducing data reproduced in the recording and reproducing system and output through the opening of the fourth shutter in a reproducing operation; And And a first CCD for converting the reimaged reproduction data into an electrical signal. The system of claim 2, wherein the second regenerative output system is: A second reimaging lens for reimaging the reproduction data reproduced in the reproduction system and reflected through the second optical separator in a reproduction operation; And And a second CCD for converting the reimaged reproduction data into an electrical signal.

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