KR100845706B1 - Optical information processing device, optical information recording method, optical information reproducing method, spatial light modulator and optical modulation method using the same - Google Patents

Abstract

The present invention relates to an optical information processing apparatus, an optical information recording method, an optical information reproducing method, a spatial light modulator, and an optical modulation method using the same. The optical information processing apparatus according to an embodiment of the present invention includes: a light source for emitting light; Separating the input data into the light through the on / off of the liquid crystal cell provided in the dog, and controlling the reflection position of the light passing through the liquid crystal cell to modulate the phase of the light, separating the light into a reference light and a signal light A condenser optical system for intersecting the separated reference light and the signal light in an optical information storage medium; an optical detector for detecting a reproduction light to be reproduced by injecting a reference light for reproduction into the optical information storage medium; Since the spatial light modulator loads data into the light and modulates the phase of light, The hot spots can be more effectively removed, and the pattern and phase of the reference light incident upon optical information recording can be restored as it is, and the reproduction efficiency of the light can be improved.

Description

Optical information processing apparatus, optical information recording method, optical information reproducing method, spatial light modulator and optical modulation method using the same {Apparatus for processing optical information, method for processing optical information, spatial light modulator and method of modulation beam using the same}

1 is a configuration diagram briefly showing an optical information processing apparatus according to an embodiment of the present invention.

2 is an enlarged cross-sectional view schematically showing a part of a spatial light modulator according to an embodiment of the present invention.

3 is a flowchart showing an optical information recording method according to an embodiment of the present invention.

4 is a flowchart illustrating an optical modulation method using a spatial light modulator according to an embodiment of the present invention.

5 is an enlarged view showing a part of a data page displayed in a spatial light modulator according to the present invention.

FIG. 6 is a cross-sectional view of the line II ′ shown in FIG. 5 and illustrates an optical modulation operation according to an exemplary embodiment of the present invention.

7 is a conceptual diagram illustrating an optical phase state modulated by a spatial light modulator according to an embodiment of the present invention.

8 is a flowchart illustrating a method of reproducing optical information according to an embodiment of the present invention.

9 is a block diagram schematically illustrating an optical information processing apparatus according to another embodiment of the present invention.

10 is a flowchart showing an optical information recording method according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

200: spatial light modulator 210: optical phase modulation layer

230: spatial light modulation layer 250: base substrate

250: control unit

The present invention relates to an optical information processing apparatus, an optical information recording method, an optical information reproducing method, a spatial light modulator, and an optical modulation method using the same. More particularly, the optical data is loaded onto an incident light and modulates a phase of the light. An information processing apparatus, an optical information recording method, an optical information reproducing method, a spatial light modulator, and an optical modulation method using the same.

Recently, with the rapid development of the information and computer industry, there is an increasing demand for a storage device capable of satisfying high capacity storage capacity and high speed input / output of data.

Therefore, it is an optical information storage device capable of high-capacity storage and high-speed input / output of data using optical, and it is a compact disc (CD), a digital versatile disc (DVD), a high definition DVD (HD-DVD), Blue-ray discs (BD), holographic (Holographic) and the like are in the spotlight.

Among them, the optical information processing apparatus using holographic crosses a signal beam in which data is loaded on a light-sensitive photosensitive medium, and a reference beam having an incident angle different from that of the signal light, and is generated by the interference of the two lights. Record the interference pattern in the photosensitive medium.

Here, a device for separating the light provided from the light source into the reference light and the signal light, or for loading data into the signal light, operates at a low voltage, and has a low power consumption and excellent matrix addressing capability (Spatial light modulator; SLM). ) Is widely used.

The spatial light modulator has a plurality of cell regions. The spatial light modulator displays the input binary data as data pages divided into on / off pixels through control of each cell area. The spatial light modulator transmits (or reflects) incident light in a cell region corresponding to an on pixel, and blocks its progression in a cell region corresponding to an off pixel.

In this way, the spatial light modulator displays the input data as a displayed data page and loads it onto the light.

On the other hand, the light loaded with the data page by the spatial light modulator is Fourier transformed to enter the optical information storage medium. However, in the Fourier transform, a DC component, which is a residual component, is concentrated in the center of the light in the intensity-modulated light in the spatial light modulator, thereby generating a hot spot in the optical information storage medium. Such hot spots cause damage to the optical information storage medium, and act as a problem of lowering the recording efficiency of the optical information.

Therefore, as a countermeasure for eliminating the DC component, a method of changing the phase of light using a phase mask having a pitch equal to the cell region pitch of the spatial light modulator and having a pattern having a phase difference of zero and π is adopted.

However, when reproducing optical information recorded using the phase mask, the pattern of the phase mask has the same pitch as the cell region of the spatial light modulator, which makes it difficult to align the pattern of the phase mask to the same position as the optical information recording. I have a problem.

In addition, the phase of the recorded light is not properly restored when the optical information is reproduced, and thus the optical information reproduction efficiency is lowered.

Disclosure of Invention The present invention has been made to solve the above-mentioned problems, and includes an optical information processing apparatus and an optical information recording method for loading data into light, modulating the phase of the light to efficiently remove hot spots, and improving optical information reproduction efficiency. To provide an optical information reproducing method, a spatial light modulator and an optical modulation method using the same.

An optical information processing apparatus according to an embodiment of the present invention for achieving the above object is a light source for emitting light; by loading the input data to the light through the on / off of a plurality of liquid crystal cells, the liquid crystal cell A separation optical system that modulates a phase of the light by controlling a reflection position of the transmitted light, and separates the light into a reference light and a signal light; a condensing optical system that crosses the separated reference light and the signal light in an optical information storage medium; storing the optical information And a photo detector which detects the reproduction light to be reproduced by injecting the reproduction reference light into the medium.

The separation optical system loads input data into the light through on / off of a plurality of liquid crystal cells, and controls a reflection position of the light passing through the liquid crystal cell to modulate the phase of the light to cope with the light. And a spatial light modulator formed of the reference light and the signal light.

The spatial light modulator is provided with a plurality of reflecting plates, the optical phase modulation layer for changing the phase of the light by controlling the position of the reflecting plate; stacked on the optical phase modulation layer, a plurality of liquid crystal cells corresponding to the reflecting plate And a spatial light modulation layer configured to load input data into the light through on / off of the liquid crystal cell; controlling on / off of the liquid crystal cell according to the input data, and controlling the spatial light modulation layer and the reflector. It may be provided with a control unit for controlling the distance.

The optical phase modulation layer may include a micro actuator for linearly moving the reflector to the spatial light modulation layer; an electrode for applying a voltage to the micro actuator; a separation wall for securing a linear movement space of the reflector.

The micro actuator may be a piezoelectric element.

The spatial light modulation layer may include a first transparent substrate and a second transparent substrate for forming a mechanical structure of the liquid crystal cell; the first transparent substrate and the second transparent substrate to insert liquid crystal molecules constituting the liquid crystal cell. Spacer to secure an interspace; A transparent electrode for applying a voltage for the on / off control of the liquid crystal cell may be provided.

The separation optical system may further include: a light splitter configured to separate the light into the reference light and the signal light; loading input data into the signal light through on / off of a plurality of liquid crystal cells, and reflecting positions of the signal light passing through the liquid crystal cell. And a spatial light modulator for controlling and modulating the phase of the signal light.

On the other hand, the optical information recording method according to an embodiment of the present invention includes a light emitting step; the input data is loaded on the signal light through the on / off of the plurality of liquid crystal cells provided, the reflection position of the signal light passing through the liquid crystal cell And a modulating phase of the signal light to separate the light into a reference light and a signal light; and a recording step of crossing the reference light and the signal light on an optical information storage medium.

In the optical modulation step, the reflection plate reflecting the signal light may be linearly moved to the side where the signal light is incident, and the position of the reflection plate may be adjusted.

On the other hand, the optical information recording method according to another embodiment of the present invention includes a light emitting step; separating the light into a reference light and a signal light; an input data through the on / off of the plurality of liquid crystal cells provided to the signal light And an optical modulation step of modulating a phase of the signal light by controlling a reflection position of the signal light passing through the liquid crystal cell; a recording step of crossing the reference light and the signal light on an optical information storage medium.

In the optical modulation step, the reflection plate reflecting the signal light may be linearly moved to the side where the signal light is incident, and the position of the reflection plate may be adjusted.

On the other hand, the optical information reproducing method according to an embodiment of the present invention; light emitting step; controlling the on / off of the plurality of liquid crystal cells provided, and controls the reflection position of the light passing through the liquid crystal cell to the optical information A light modulation step of restoring the incident reference light upon recording; providing a reference light for reproduction in which the light is provided as a reference light for reproduction; a detection step of detecting the reproduction light in which the reference light for reproduction is incident on an optical information storage medium; It may be provided.

The light modulation step may linearly move the reflecting plate reflecting the light to the side where the light is incident, and adjust the position of the reflecting plate.

On the other hand, the spatial light modulator according to an embodiment of the present invention includes a plurality of reflecting plate, the optical phase modulation layer for changing the phase of the incident light is controlled by the position of the reflecting plate; stacked on the optical phase modulation layer, A spatial light modulation layer having a plurality of liquid crystal cells corresponding to a reflector, and loading input data into the light through on / off of the liquid crystal cell; controlling on / off of the liquid crystal cell according to the input data, And a controller configured to control a distance between the spatial light modulation layer and the reflector.

The optical phase modulation layer may include a micro actuator for linearly moving the reflector to the spatial light modulation layer; an electrode for applying a voltage to the micro actuator; a separation wall for securing a linear movement space of the reflector.

The micro actuator may be a piezoelectric element.

The spatial light modulation layer may include a first transparent substrate and a second transparent substrate for forming a mechanical structure of the liquid crystal cell; between the first transparent substrate and the second transparent substrate to insert liquid crystal molecules constituting the liquid crystal cell. Spacer for securing a space; A transparent electrode for applying a voltage for the on / off control of the liquid crystal cell may be provided.

The sum of the incidence angle of the light incident on the reflecting plate and the reflection angle of the light reflected on the reflecting plate may be set within a range in which the light incident on the reflecting plate may be reflected and emitted through the transmitted liquid crystal cell.

On the other hand, the optical modulation method according to an embodiment of the present invention is a data input step; controlling the on / off of each liquid crystal cell through which light is transmitted in accordance with the input data to load the input data to the light, the liquid crystal cell And a light modulation step of modulating a phase of the light by controlling a reflection position of the light passing therethrough.

The light modulation step may linearly move the reflecting plate reflecting the light to the side where the light is incident, and adjust the position of the reflecting plate.

Hereinafter, an optical information processing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram briefly showing an optical information processing apparatus according to an embodiment of the present invention. Referring to FIG. 1, the optical information processing apparatus 100 includes a light source 110, a separation optical system 130, a condensing optical system 150, and a photo detector 170.

The light source 110 is provided to emit light L. After the light source 110 may be provided with a light diffuser 120 to diffuse the diameter of the light (L) emitted from the light source 110 to proceed to parallel light.

The separation optical system 130 may include a spatial light modulator 200 for modulating the light L into the reference light R and the signal light S. The spatial light modulator 200 may be provided in a path of the light L in which the diameter is diffused and proceeds in parallel.

2 is a cross-sectional view schematically showing a spatial light modulator according to an embodiment of the present invention. Referring to FIG. 2, the spatial light modulator 200 includes a base substrate 210, an optical phase modulation layer 230, a spatial light modulation layer 250, and a controller 270.

The optical phase modulation layer 230 is stacked on the base substrate 210. The optical phase modulation layer 230 includes a reflector 231, a micro actuator 233, an electrode 235, and a separation wall 237. Here, the reflecting plate 231, the micro actuator 233 and the electrode 235 have the same pitch.

The reflective plate 231 is provided in the space between the spatial light modulation layer 250 and the base substrate 210 to reflect the light L incident through the optical phase modulation layer 230.

The micro actuator 233 is coupled to the lower portion of the reflector 231 to linearly move the position of the reflector 231 toward the optical phase modulation layer 230. The micro actuator 233 can be realized by adopting a piezoelectric element in which mechanical deformation occurs when a voltage is applied. As such piezoelectric elements, quartz, Rochelle salt, barium titanate, or the like may be used.

The electrode 235 is in contact with the top and bottom of the micro actuator 233, respectively, to apply a voltage to the micro actuator 233.

The separation wall 237 is provided between the spatial light modulation layer 250 and the base substrate 210 to secure a space in which the reflector 231 may be linearly moved by the micro actuator 233.

The spatial light modulation layer 250 includes a first transparent substrate 251a, a second transparent substrate 251b, a spacer 253, a liquid crystal cell 115, and a transparent electrode 257.

The first transparent substrate 251a and the second transparent substrate 251b form a mechanical structure of the liquid crystal cell 255. The material of the first transparent substrate 251a and the second transparent substrate 251b may be any one of synthetic resin such as glass or plastic that does not affect light transmission.

The spacer 253 is provided between the first transparent substrate 251a and the second transparent substrate 251b to provide a space for injecting liquid crystal molecules (not shown) constituting the liquid crystal cell 255. . The liquid crystal molecules of the liquid crystal cell 255 are provided to have a predetermined direction. The liquid crystal molecules may be vertically arranged with respect to the first transparent substrate 251a and the second transparent substrate 251b.

The liquid crystal cell 255 has the same pitch as the pixel pitch of the data page displayed by the spatial light modulator 200 between the first transparent substrate 251a and the second transparent substrate 251b.

Although not shown here, it is difficult to obtain the same liquid crystal molecule arrangement state simply by sandwiching the liquid crystal molecules between the first transparent substrate 251a and the second transparent substrate 251b. It is preferable to provide an alignment film (not shown) on the inner wall of 253.

The transparent electrode 257 is a thin film electrode having a high light transmittance and is provided on the first transparent substrate 251a. An example of such a transparent electrode 257 may be indium tin oxide (ITO).

The controller 270 controls on / off of the liquid crystal cell according to the input data, and to control the distance between the spatial light modulating layer and the reflecting plate, on one side of the optical phase modulating layer 230 and the spatial light modulating layer 250. It may be provided.

Referring back to FIG. 1, a pair of lenses 141 and 143 may be disposed between the spatial light modulator 200 and the condensing optical system 150 to remove unnecessary lights that may be included in the reference light R and the signal light S. The optical filter 145 may be provided at a position where the focus of the reference light R and the signal light S is formed between the pair of lenses 141 and 143.

The condensing optical system 150 may be a Fourier transform lens 151. The Fourier transform lens 151 intersects the reference light R and the signal light S modulated by the spatial light modulator 200 in the optical information storage medium 10 in which optical information is recorded. It is provided between the information storage medium (10).

The photo detector 170 is provided in the path of the reproduction light P to which the reproduction reference light R 'is incident on the optical information storage medium 10 and reproduced. An imaging lens 160 may be provided between the optical information storage medium 10 and the photo detector 170 to form the reproduction light P on the photo detector 170.

Hereinafter, an optical information processing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart showing an optical information recording method according to an embodiment of the present invention. Referring to FIG. 3, the light L is emitted from the light source 110 for recording the optical information (S11). The emitted light L is diffused in the light diffuser 120 and proceeds to parallel light.

The light L is loaded with input data by the spatial light modulating layer 250 of the spatial light modulator 200, and the phase is modulated by the optical phase modulating layer 230 of the spatial light modulator 200.

4 is a flowchart illustrating a light modulation method using a spatial light modulator according to an embodiment of the present invention. Referring to FIG. 4, predetermined data is input to the spatial light modulator 200 (S131). The input data may include data page information divided into on / off pixels for controlling on / off of the liquid crystal cell 255 displayed in the spatial light modulator 200.

FIG. 5 is an enlarged view illustrating a part of a data page displayed in a spatial light modulator according to the present invention, and FIG. 6 is a cross-sectional view of the data page shown in FIG. 5 based on the line II ′ of FIG. This is an operation diagram showing a modulation operation.

5 to 6, the spatial light modulator 200 transmits a voltage through the control unit 270 to the transparent electrode 257 of the liquid crystal cell 255 corresponding to the off pixel Px1, and transmits a transparent electrode ( 257 applies a voltage to the liquid crystal cell 255. As a voltage is applied to the liquid crystal cell 255 through the transparent electrode 257, the liquid crystal molecules of the liquid crystal cell 255 are vertically aligned with respect to the first transparent substrate 251a and the second transparent substrate 251b. Is changed to the horizontal array state. In this case, the liquid crystal molecules of the liquid crystal cell 255 to which the voltage is not applied maintain the vertical alignment with respect to the first transparent substrate 251a and the second transparent substrate 251b.

As described above, the data page DP1 displayed in the spatial light modulator 200 is a liquid crystal cell 255 in which liquid crystal molecules are horizontally aligned with respect to the first transparent substrate 251a and the second transparent substrate 251b. The liquid crystal cell represented by (Px1) and whose liquid crystal molecules are vertically aligned with respect to the first transparent substrate 251a and the second transparent substrate 251b is displayed as an on pixel Px2.

At this time, the light L incident on the spatial light modulation layer 250 is blocked in the liquid crystal cell 255 represented by the off pixel Px1, and transmitted through the liquid crystal cell represented by the on pixel Px2. It is transmitted to the optical phase modulation layer 230.

As such, the light L incident to the spatial light modulation layer 250 is a liquid crystal cell corresponding to ON by controlling the on / off of each liquid crystal cell 255 corresponding to the on / off pixels Px2 and Px1. Only the light L transmitted through 255 is incident on the light phase modulation layer 230.

The input data may include phase information on each light L passing through each liquid crystal cell 255 corresponding to the on pixel Px2. That is, the position information of the reflecting plate 231 that transmits the light L incident through the liquid crystal cell 255 and enters the light phase modulation layer 230 is included.

The spatial light modulator 200 transmits a voltage to the electrode 235 corresponding to the on pixel Px2 by the controller 270. In this case, the voltage delivered to the electrode 235 may have a different voltage according to the phase information of the light L corresponding to the on pixel Px2.

According to the voltage transmitted to each electrode 235, the micro actuator 233, that is, the piezoelectric element, linearly moves the reflecting plate 231 to the spatial light modulation layer 250, and the spatial light modulation layer 250 and each reflecting plate 231. Adjust the distance of).

At this time, the phase of light L transmitted through the spatial light modulation layer 250 is modulated according to the position of the reflector 231, and the light L is reflected by the reflector 231. Here, the sum of the incident angle θ1 of the light L incident on the reflector 231 and the reflection angle θ2 of the light L reflected by the reflector 231 is the light L incident on the reflector 231. It is preferable to set in the range which can be reflected and emitted through this transmitted liquid crystal cell.

The light L reflected by the reflecting plate 231 to the spatial light modulating layer 250 is transmitted by the transmitted liquid crystal cell 255 when incident on the reflecting plate 231, and is emitted to the outside of the spatial light modulator 200. do.

7 is a conceptual diagram illustrating an optical phase state modulated by a spatial light modulator according to an embodiment of the present invention. Referring to FIG. 7, the light phase modulation layer 230 modulates light L passing through the liquid crystal cell 255 corresponding to the on pixel Px2 to have different phases according to the position of the reflector 231. . For example, the light phase modulating layer 230 includes a phase Ph1 of 0 이 that is reflected by the light L reflected by the reflector 231 having a distance h1 between the spatial light modulator 250 and the reflector 231. If so, the light L reflected by the reflecting plate 231 whose distance between the spatial light modulation layer 250 and the reflecting plate 231 is h2 is modulated to have a phase Ph2 of 180 Hz.

As described above, the spatial light modulator 200 controls the on / off of each liquid crystal cell 255 through which the light L is transmitted according to the input data to load the input data into the light L, and the liquid crystal cell 255. The reflection position of the light L passing through is controlled to modulate the phase of the light L (S133).

 Referring back to FIG. 3, the light L emitted from the light source 110 is loaded with input data, the phase is modulated, and the reference light R and the signal light S having coaxiality by the spatial light modulator 200. Separated by). The signal light S proceeds to the center of the optical axis, and the reference light R proceeds not to overlap the signal light S at the edge portion of the signal light S (S13).

 The reference light R and the signal light S modulated by the spatial light modulator 200 have the same focal length between the pair of lenses 141 and 143. In this case, unnecessary light that may be included in the reference light R and the signal light S is blocked by the optical filter 145.

The reference light R and the signal light S cross the optical information storage medium 10 by the Fourier transform lens 151 to form an interference fringe, and record the optical information (S15).

Hereinafter, an optical information reproducing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

8 is a flowchart illustrating a method of reproducing optical information according to an embodiment of the present invention. Referring to FIG. 8, light L is emitted from the light source 110 to reproduce the optical information (S31). The light L is incident to the spatial light modulator 200 via the light diffuser 120.

The spatial light modulator 200 modulates the light L into a reference light R incident upon optical information recording. That is, the light L is modulated by the pattern of reference light R incident upon optical information recording by the spatial light modulating layer 250 of the spatial light modulator 200, and the optical phase modulating layer of the spatial light modulator 200. By 230, the phase of the light L is modulated to the phase of the reference light R incident upon optical information recording (S33).

In this way, the light L modulated with the pattern and phase of the reference light R incident upon optical information recording is provided as the reproduction light reference light R '(S35).

The reproduction reference light R 'is incident on the spatial Fourier transform lens 151 through the pair of lenses 141 and 143 and the optical filter 145. The Fourier transform lens 151 causes the reproduction reference light R 'to enter the optical information storage medium 10.

The reproduction light P reproduced by the reproduction reference light R 'is incident on the light detector 170 through the imaging lens 160. The photodetector 170 detects the reproduction light P (S37) and acquires the optical information from the reproduction light P.

Hereinafter, an optical information processing apparatus according to another embodiment of the present invention will be described. In the following description, the optical information processing apparatus according to the embodiment of the present invention described above and the components having similar configurations and operations are denoted by the same reference numerals, and detailed description thereof will be omitted. Therefore, the components omitted from the detailed description should be understood with reference to the above description.

9 is a block diagram schematically illustrating an optical information processing apparatus according to another embodiment of the present invention. Referring to FIG. 9, the separation optical system 130a of the optical information processing apparatus 100a includes an optical separator 131 for separating the light L emitted and a path of the signal light S transmitted through the optical separator 131. It may be provided with a spatial light modulator (200a) provided in.

In this case, the multiplexer 135 may be provided in the path of the reference light R reflected by the optical splitter 131 to multiplex the incident angle of the reference light R and enter the optical information storage medium 10.

In addition, the condensing optical system 150a may include the first Fourier transform lens 153 and the second Fourier transform lens 155 for injecting the reference light R and the signal light S into the optical information storage medium 10, respectively. have.

10 is a flowchart showing an optical information recording method according to another embodiment of the present invention. Referring to FIG. 10, light L is emitted from the light source 110 for recording optical information (S21). The emitted light L is diffused in the light diffuser 120 and proceeds to parallel light. The light L is incident to the light separator 131 of the separation optical system 130a and is separated into the reference light R and the signal light S (S23).

The signal light S transmitted by the optical separator 131 is incident to the spatial light modulator 200a. The signal light S is loaded with input data by the spatial light modulator 200a, and the phase is modulated according to the reflection position (S25). The signal light S is incident on the optical information storage medium 10 through the second Fourier transform lens 155.

Meanwhile, the reference light R reflected by the optical separator 131 is angularly multiplexed by the multiplexer 135, passes through the first Fourier transform lens 153, and crosses the signal light R in the optical information storage medium 10. An interference fringe is formed and optical information is recorded (S15).

On the other hand, when the optical information is reproduced, the signal light S transmitted through the optical splitter 131 is blocked by the shutter 133 blocking the optical path, and the reference light R reflected by the optical splitter 131 is The multiplexer 135 restores the incident angle of the reference light R recorded in the interference fringe to provide the optical information storage medium 10 as the reference light R 'for reproduction.

The photo detector 170 detects the reproduction light P reproduced by the reproduction reference light R 'and acquires the optical information.

As described above, the optical information processing apparatus, the optical information recording method, the optical information reproducing method, the spatial light modulator and the optical modulation method using the same do not have a separate phase mask and load data into the light in the spatial light modulator. Since the phase of the light is modulated at the same time, hot spots that may occur in the optical information storage medium can be more effectively removed, and when the optical information is reproduced, the pattern and phase of the reference light can be restored as it is, thereby improving light reproduction efficiency. It works.

Claims (20)

A light source for emitting light; Loading input data into the light through on / off of a plurality of liquid crystal cells, modulating the phase of the light by controlling the reflection position of the light passing through the liquid crystal cell, and separating the light into reference light and signal light. Separation optical system; A condensing optical system for crossing the separated reference light and the signal light on an optical information storage medium; And a photo detector for detecting reproduction light to be reproduced by injecting a reproduction reference light into the optical information storage medium. The method of claim 1, wherein the separation optical system The input data is loaded onto the light through on / off of a plurality of liquid crystal cells, and the reflection position of the light passing through the liquid crystal cell is controlled to modulate the phase of the light so that the light is coaxial with the reference light and the signal light. Optical information processing apparatus comprising a spatial light modulator to form a. The method of claim 2, wherein the spatial light modulator An optical phase modulating layer having a plurality of reflecting plates and controlling the position of the reflecting plate to change the phase of the light; A spatial light modulation layer stacked on the optical phase modulation layer and having a plurality of liquid crystal cells corresponding to the reflecting plate, for loading input data into the light through on / off of the liquid crystal cell; And a controller configured to control on / off of the liquid crystal cell according to the input data and to control a distance between the spatial light modulating layer and the reflecting plate. The optical phase modulation layer of claim 3, wherein A micro actuator for linearly moving the reflector to the spatial light modulation layer; An electrode for applying a voltage to the micro actuator; And a separation wall for securing a linear moving space of the reflecting plate. The optical information processing apparatus according to claim 4, wherein the micro actuator is a piezoelectric element. The method of claim 3, wherein the spatial light modulating layer A first transparent substrate and a second transparent substrate for forming a mechanical structure of the liquid crystal cell; A spacer which secures a space between the first transparent substrate and the second transparent substrate to insert liquid crystal molecules constituting the liquid crystal cell; And a transparent electrode for applying a voltage for on / off control of the liquid crystal cell. The method of claim 1, wherein the separation optical system A light splitter separating the light into the reference light and the signal light; And a spatial light modulator for loading input data into the signal light through on / off of a plurality of liquid crystal cells, and controlling a reflection position of the signal light passing through the liquid crystal cell to modulate the phase of the signal light. An optical information processing apparatus characterized by the above-mentioned. Light emission step; The input data is loaded onto the signal light through on / off of a plurality of liquid crystal cells, and the reflection position of the signal light passing through the liquid crystal cell is controlled to modulate the phase of the signal light, and the light is converted into the reference light and the signal light. A light modulation step of separating; And a recording step in which the reference light and the signal light intersect in an optical information storage medium. 9. The optical information recording method according to claim 8, wherein the optical modulation step linearly moves the reflecting plate reflecting the signal light to the side where the signal light is incident, and adjusts the position of the reflecting plate. Light emission step; A light separation step of separating the light into a reference light and a signal light; An optical modulation step of loading input data into the signal light through on / off of a plurality of liquid crystal cells, and modulating a phase of the signal light by controlling a reflection position of the signal light passing through the liquid crystal cell; And a recording step in which the reference light and the signal light intersect in an optical information storage medium. 11. The optical information recording method according to claim 10, wherein the optical modulation step linearly moves the reflecting plate reflecting the signal light to the side where the signal light is incident and adjusts the position of the reflecting plate. Light emission step; An optical modulation step of controlling on / off of a plurality of liquid crystal cells and controlling a reflection position of the light passing through the liquid crystal cell to restore the light to incident reference light when optical information is recorded; Providing a reference light for reproduction in which the light is provided as a reference light for reproduction; And a detecting step of detecting the reproduction light reproduced by the reproduction reference light incident on the optical information storage medium. The optical information reproducing method according to claim 12, wherein the light modulation step linearly moves the reflecting plate reflecting the light to the side where the light is incident, and adjusts the position of the reflecting plate. An optical phase modulation layer having a plurality of reflecting plates, the position of the reflecting plates being controlled to change a phase of incident light; A spatial light modulation layer stacked on the optical phase modulation layer and having a plurality of liquid crystal cells corresponding to the reflecting plate, for loading input data into the light through on / off of the liquid crystal cell; And a controller configured to control on / off of the liquid crystal cell according to the input data and to control a distance between the spatial light modulating layer and the reflecting plate. The optical phase modulating layer of claim 14, A micro actuator for linearly moving the reflector to the spatial light modulation layer; An electrode for applying a voltage to the micro actuator; And a separation wall for securing a linear moving space of the reflecting plate. 16. The spatial light modulator of claim 15, wherein the micro actuator is a piezoelectric element. The method of claim 14, wherein the spatial light modulation layer A first transparent substrate and a second transparent substrate for forming a mechanical structure of the liquid crystal cell; A spacer which secures a space between the first transparent substrate and the second transparent substrate to insert liquid crystal molecules constituting the liquid crystal cell; And a transparent electrode for applying a voltage for on / off control of the liquid crystal cell. 15. The method of claim 14, wherein the sum of the incident angle of the light incident on the reflecting plate and the reflection angle of the light reflected on the reflecting plate And the light incident to the reflector is set within a range that can be reflected and emitted through the transmitted liquid crystal cell. Data input step; Light for modulating the phase of the light by controlling the on / off of each liquid crystal cell through which light is transmitted in accordance with the input data to load the input data into the light, and controlling the reflection position of the light passing through the liquid crystal cell. And a modulating step. 20. The method of claim 19, wherein the light modulation step comprises linearly moving the reflecting plate reflecting the light to the side where the light is incident, and adjusting the position of the reflecting plate.

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