JPH0792933B2 - Reproduction device for charge latent image recording - Google Patents

Description

The present invention relates to a reproducing apparatus for recording a latent charge image.

(Prior Art) In recent years, new demands for television systems such as so-called EDTV and HDTV have been proposed in response to increasing demand for high-quality and high-resolution reproduced images. As is well known, in order to obtain a reproduced image with high image quality and high resolution, an image pickup apparatus capable of generating a video signal capable of reproducing the reproduced image with high image quality and high resolution. However, in an image pickup device in which an image pickup tube is used as an image pickup element,
Since there is a limit to miniaturization of the electron beam diameter in the image pickup tube, it is not possible to expect high resolution due to the miniaturization of the electron beam diameter, and the target capacity of the image pickup tube increases corresponding to the target area. Therefore, it is not possible to realize high resolution by increasing the target area, and, for example, in the case of a moving image pickup device, the frequency band of the video signal is several tens of MHz to several hundreds MHz or more with the increase in resolution. Therefore, it is difficult to generate a video signal capable of reproducing a high-quality / high-resolution reproduced image by the image pickup device for the reason that it causes a problem in terms of S / N.

As described above, the conventional image pickup apparatus cannot generate a video signal capable of reproducing a high-quality / high-resolution reproduced image satisfactorily due to the presence of the image pickup element indispensable for its configuration. In order to solve the above-mentioned point, the applicant company first obtained a high-resolution optical image with an imaging device using a light-to-light conversion element, and used the light-to-charge conversion element to obtain the optical image. We have proposed an imaging method and a recording method for recording a high-resolution charge latent image on a recording medium having a charge storage layer.

(Problems to be Solved by the Invention) By the way, a high-resolution optical image is obtained by the imaging device using the light-to-light conversion element described above, and the optical image is formed into a charge storage layer by using the light-to-charge conversion element. It is necessary to read the charge latent image recorded on the recording medium as an electric signal when the imaging system and the recording system are implemented by the applicant company so as to record the charge latent image having high resolution on the recording medium. It was said that the means for that were required.

(Means for Solving the Problems) The present invention comprises at least a read light source that emits read light, a charge holding layer that is transparent to light in the wavelength range of the read light, and a transparent electrode. A recording medium capable of recording information to be read symmetrically as a charge latent image, a transparent electrode transparent to light in the wavelength range of read light, and a light modulation material layer member are laminated at least. The optical reading head and the read light that has changed its light state corresponding to the charge latent image recorded on the recording medium and transmitted through the optical reading head and the recording medium are And a variable plate that converts light into a light showing a change in light intensity according to a charge latent image in the recording medium, and holds the charge in the recording medium in an optical path from the light source of the reading light to the polarizing plate. Layer and the optical reading The present invention provides a reproducing device for charge latent image recording in which a light modulation material layer member in a head is arranged so as to face each other in a state of being close to each other.

(Embodiment) Hereinafter, specific contents of the reproducing apparatus for electrostatic latent image recording of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration of a reproducing device for electrified latent image recording for explaining the constitutional principle and operation principle of the reproducing device for electric latent image recording according to the present invention, and FIGS. FIG. 4 is a side sectional view of an optical reading head including a light modulating material layer member, and FIGS. 4 to 7 are block diagrams of different constitutional aspects of the reproducing apparatus for charge latent image recording of the present invention.
FIG. 8 is a block diagram showing an example of a recording apparatus used to form a charge latent image on a recording medium, FIG. 9 is a plan view of an example configuration of a three-color separation optical system, and FIG. 10 is shown in FIG. FIG. 11 is a perspective view of the three-color separation optical system of FIG. 11, and FIG. 11 is a plan view illustrating a recording / reproduction area formed by the three-color separation optical system shown in FIG.

In FIG. 1, PS is a light source of the reading light RL (for example, a laser light source), PL is a polarizer (a polarizer PL is not necessary when the reading light source PS emits a predetermined linearly polarized light), Hr
Is an optical read head, RM is a recording medium for recording recorded information in the form of a latent electric charge image, and this recording medium RM is a transparent electrode (for example, a transparent electrode made of an ITO film) Et capable of transmitting the reading light RL and reading. It has a structure in which a transparent charge latent image holding member CHL capable of transmitting the light RL is laminated. Recording medium R
As the charge latent image holding member CHL in M, a material layer having a high insulating property capable of holding the charge latent image formed thereon for a long time and transmitting light in the wavelength range of read light, for example, An insulating layer formed of a polymer material may be used.

The recording medium RM described above includes a tape shape, a disk shape,
The recording medium RM may be used in any form such as a sheet or a card, and the recording medium RM may be rigid or flexible.

WP is a wave plate that is provided as necessary when optically biasing the optical read head Hr, AL is an analyzer, PD is a photodetector, and 1 is an output terminal.

As the above-mentioned optical read head Hr, a transparent electrode Etr that transmits the light RL in the wavelength range of the read light and a light modulation material layer member PML exhibiting characteristics such that the light state can be changed by the applied voltage. It has a laminated structure, and a concrete example of the structure is, for example, as shown in FIG.
A material having an electro-optical effect as the transparent electrode Etr and the light modulation material layer member PML (eg, lithium niobate single crystal, LiTa
O ₃ , BSO) layer, or a light such as a liquid crystal layer such as a nematic liquid crystal showing a rotatory effect by an electric field as a transparent electrode Et and a light modulating material layer member PML as shown in the third illustration. For example, a material layer for modulation can be used.

BP in the optical read head Hr shown in FIG.
Is a substrate made of a material that allows the read light RL to pass therethrough, and the optical read head Hr shown in FIG. 2 allows the read light RL to pass through the substrate BP. The transparent electrode Etr and the light modulation material layer member PML made of a substance having an electro-optical effect (eg, lithium niobate single crystal, LiTaO ₃ , BSO) are laminated to form an optical read head Hr.

The optical read head Hr shown in FIG.
When the electric field of the charge latent image on the recording medium RM is applied to the light modulation material layer member PML by arranging it close to the recording medium RM on which the charge latent image is formed, the light modulation material layer member PML is formed.
A layer of a substance having an electro-optical effect (for example, lithium niobate single crystal, LiTaO ₃ , BSO) that passes through the layer in response to an electric field applied to it Since it operates so as to change the phase difference, when the read light RL that is transmitted in series through the optical read head Hr and the recording medium RM having the second configuration is passed through the analyzer AL, Readout light showing a pattern of light intensity corresponding to the charge pattern in the charge latent image is obtained.

Further, in the optical read head Hr shown in FIG. 3, BP1 and BP2 are substrates made of a material that allows the read light RL to pass therethrough, and the optical read head Hr shown in FIG. The read head Hr includes the substrates BP1 and BP2, a transparent electrode Etr capable of transmitting the read light RL, an alignment film 2, and partition walls.
An optical read head is formed by stacking the alignment films 3 and 4 and a light modulation material layer member PML made of liquid crystal such as nematic liquid crystal exhibiting an electric field scattering effect.

Therefore, the optical read head Hr shown in FIG.
If the electric field of the charge latent image on the recording medium RM is applied to the light modulation material layer member PML by arranging it close to the recording medium RM on which the charge latent image is formed, it varies depending on the strength of the electric field. A material layer for light modulation consisting of a liquid crystal layer such as a nematic liquid crystal exhibiting an optical rotation effect changes the degree of optical rotation of light passing through the layer according to an electric field given by the charge latent image of the recording medium RM. When the read light RL that has passed through the optical read head Hr and the recording medium RM having the configuration shown in FIG. 3 in series is passed through the analyzer AL, the charges in the charge latent image of the recording medium RM are operated. Readout light indicating a pattern of light intensity corresponding to the pattern can be obtained.

Therefore, in the charge latent image recording reproducing apparatus shown in FIG. 1, the optical read head Hr is disposed close to the recording medium RM on which the charge latent image is formed on the charge latent image holding member CHL. RM transparent electrode Et and optical read head Hr
When the reading light RL is emitted from the light source PS of the reading light with the transparent electrode Etr of the same potential as that of the reading light RL, the reading light RL becomes the polarizer PL → optical reading head Hr → recording medium RM → wave plate WP → analyzer AL.
→ It is given to the photodetector PD by the optical path of the photodetector PD.

By the way, as described above, the light modulation material layer member PML in the optical reading head Hr arranged in proximity to the recording medium RM on which the charge latent image is formed is recorded on the charge latent image holding member CHL in the recording medium RM. Since the electric field of the charge latent image being applied is given, the read light RL transmitted through the optical read head Hr is the same as that described with reference to FIG. 2 by the optical read head Hr used in FIG. In either case, the optical read head Hr and the recording medium RM are connected in series, regardless of whether they have the configuration mode or the configuration mode described with reference to FIG. The read light that has passed through the recording medium is in a state in which the polarization plane is changed as described above in response to the electric field according to the distribution of the charge amount in the charge latent image recorded on the recording medium RM. , Passing through the analyzer AL, optical inspection Light provided to the vessel PD has become what the light intensity corresponding to the charge latent image recorded on the recording medium RM is changing.

Therefore, the recording medium RM is output from the photodetector PD to the output terminal 1.
An electric signal corresponding to the distribution of the charge amount of the latent charge image recorded on the recording medium is output. Thus, as is clear from the principle of construction and the description of the construction principle of the apparatus for reproducing charge latent image recording of the present invention performed with reference to FIG. 1, the reproduction apparatus for charge latent image recording of the present invention performs recording. The medium RM and the optical read head Hr are disposed close to each other, and the read light RL emitted from the light source PS of the read light is transmitted in series to the optical read head Hr and the recording medium RM (optical read head). The order in which the read light RL is serially transmitted to both the Hr and the recording medium RM may be the order of the optical read head Hr → the recording medium RM, or the recording medium RM → the optical read head Hr. It doesn't matter which order you choose.)
Then, the reading light RL whose light state is changed corresponding to the charge latent image formed on the recording medium RM is converted into light showing a change in light intensity according to the charge latent image on the recording medium, It can be used in various forms as in Examples described later, and in any case, it is easy to generate a high-definition electric signal or generate a high-definition optical image information. is there.

As described above, the video signal output from the photoelectric converter PD is
This corresponds to the charge amount distribution in the two-dimensional charge latent image having a high definition due to the charge latent image recorded on the recording medium RM. Therefore, when a laser light flux having a diameter of 1 micron is used as the read light RL, a video signal corresponding to a high resolution of 1000 lines / 1 mm can be generated.

4 to 6 are block diagrams of different embodiments of the reproducing apparatus for charge latent image recording according to the present invention.
The reproducing apparatus for charge latent image recording of the present invention shown in the drawing is
The read light RL emitted from the light source PS of the read light RL is transmitted through a polarizer PL provided as necessary, and then the optical deflector PD
The optical read head Hr and the recording medium RM are given to the EF as light in a state of being deflected in a predetermined deflection manner from the optical deflector PDEF.
This is an example in the case of supplying to and.

As the above-mentioned optical deflector PDEF, when the photodetector PD used in the reproducing apparatus for charge latent image recording is a line sensor,
The line sensor is used in such a deflection mode that the read light RL that is deflected in only one direction can be incident, and the photodetector PD used in the reproduction apparatus for charge latent image recording is In the case of a two-dimensional sensor, a deflection mode is used that allows the read light RL that is deflected in two directions orthogonal to the two-dimensional sensor to be incident.

The readout light RL deflected in a predetermined deflection mode by the above-mentioned optical deflector PDEF is incident on the optical readout head Hr via the lens 6. Since this optical read head Hr is arranged close to the recording medium RM, the modulation material layer member PML in the optical read head Hr is the electric field due to the charge amount distribution in the charge latent image recorded on the recording medium RM. According to the distribution, the read light RL having the polarization plane of the read light RL passing through the optical read head Hr changed is emitted, and the read light RL passes through the transparent recording medium RM and then the lens 7
It is incident on the analyzer AL via.

In the analyzer AL, since the light whose intensity varies depending on the state of rotation of the polarization plane in the read light RL incident on it is supplied to the photodetector PD, the recording medium is output from the photodetector PD. A time-series electric signal corresponding to the charge amount distribution in the charge latent image recorded in the RM is sent to the output terminal 1.

As described above, the time-series electric signal sent from the photodetector PD to the output terminal 1 is scanned by the reading light RL in which the charge latent image recorded on the recording medium RM is optically deflected by the optical deflector PDEF. It goes without saying that the electrical signals are time-series according to the scanning mode.

It should be understood that the recording medium RM should also be sub-scanned in a predetermined sub-scanning manner in accordance with the above-mentioned optical deflection manner in the optical deflector PDEF.

The signal output from the photodetector PD can be supplied to a video display device and used as a soft copy, or supplied to a printer to obtain a hard copy for use. Further, the reproducing apparatus for charge latent image recording shown in FIG. 4 makes the read light RL emitted from the recording medium RM in the state in which the optical deflector PDEF is made to perform the two-dimensional optical deflecting operation, It can also be used by projecting it onto a screen by a projection optical system so that a two-dimensional optical image can be projected.

As the light deflector PDEF, it is natural that either an electric light deflecting means, a mechanical deflecting means using a rotating mirror wheel, a movable mirror, or the like can be used.

Next, in the embodiment of the reproducing apparatus for charge latent image recording of the present invention shown in FIG. 5, the reading light RL emitted from the light source PS of the reading light is provided as necessary with a polarizer PL.
After being made into linearly polarized light with a predetermined plane of polarization by
The reading light with a large cross-sectional area is made incident on the optical read head Hr by the lens 8.

Since the optical read head Hr is arranged close to the recording medium RM, the modulation material layer member PML in the optical read head Hr depends on the charge amount distribution in the charge latent image recorded on the recording medium RM. According to the electric field distribution, the read light RL which passes through the optical read head Hr and has a changed polarization plane is emitted, and the read light RL passes through the transparent recording medium RM and then the analyzer AL. Incident on.

In the analyzer AL, the light whose intensity varies depending on the state of rotation of the plane of polarization of the read light RL incident on it is projected onto the screen 10 via the lens 9 of the projection system, and the light is projected on the screen 10. A large-area two-dimensional optical image is simultaneously projected on.

Next, in the embodiment of the reproducing apparatus for charge latent image recording of the present invention shown in FIG. 6, the reading light RL emitted from the light source PS of the reading light is provided as necessary with the polarizer PL.
After being made into linearly polarized light with a predetermined plane of polarization by
It is incident on the optical read head Hr as one read light RL having a linear shape extending in one direction by the cylindrical lens 11.

Since the optical read head Hr is arranged close to the recording medium RM, the modulation material layer member PML in the optical read head Hr depends on the charge amount distribution in the charge latent image recorded on the recording medium RM. According to the electric field distribution, one linear read light RL in which the polarization plane of the read light RL passing through the optical read head Hr is changed is emitted, and the read light RL passes through the transparent recording medium RM. After passing through, it enters the analyzer AL.

In the analyzer AL, one linear readout light that is incident on it
According to the state of rotation of the plane of polarization in RL, one linear light whose intensity varies strongly is supplied to the line sensor 12, so the line sensor 12 recorded on the recording medium RM. A time-series electric signal corresponding to one linear charge amount distribution in the charge latent image is sent to the output terminal 1.

Then, the recording medium RM is the above-mentioned one linear reading light beam.
The two-dimensional optical image recorded on the recording medium RM is obtained because the moving stage 16 is moved in a predetermined moving manner in a direction orthogonal to the extending direction of RL and the sub-scanning is performed by the moving stage 16. , The linear reading light RL described above
Main scanning and recording medium in the line sensor 12 supplied with
The time-series electric signal sent from the line sensor 12 to the output terminal 1 by the sub-scan by the movement of the RM in the sub-scan direction is obtained by scanning the charge latent image recorded on the recording medium RM. It goes without saying that the signals are time-series electric signals.

The signal output from the photodetector PD can be supplied to a video display device and used as a soft copy, or supplied to a printer to obtain a hard copy for use.

FIG. 7 shows a recording system in which an optical image of a subject is decomposed into three optical images by a three-color separation optical system and recorded as three charge latent images on a recording medium RM (two parts separated by broken lines in FIG. 7). (A portion shown below the broken line) and a reproducing system for reproducing the charge latent image recorded on the recording medium RM by the recording system described above (of the two parts separated by the broken line in FIG. 7). FIG. 8 is a block diagram of a reproducing apparatus for charge latent image recording of the present invention having a configuration including a portion (shown above a broken line). First, referring to FIGS. The configuration and operation of the recording system used for forming the charge latent image on the medium RM will be described. In FIG. 8, O is a subject, L is an imaging lens, CSA is a three-color separation optical system, ReH is a recording head, RM is a recording medium, E is an electrode, Vb is a power source, and RM is composed of a transparent conductive material. The recording medium RM is composed of an electrode Et and a charge latent image holding member CHL, and is transferred by a driving device as needed.

Further, the recording head ReH has a transparent electrode Etw and a photoconductive layer member PCL laminated on a transparent support substrate (indicated by reference numeral BP in FIG. 7) not shown in FIG. It has been configured.

3 in the color image recording apparatus shown in FIG.
With the color separation optical system CSA removed, an optical image of the object O is formed on the photoconductive layer member PCL of the recording head ReH by the imaging lens L, and the transparent electrode Etw of the recording head ReH and the transparent electrode of the recording medium RM are formed. A power source is supplied to Et and the electrode E that is in contact with the transparent electrode Et of the recording medium RM described above.
When a voltage is applied from Vb, the electric resistance value of the photoconductive layer member PCL in the recording head ReH changes the object O imaged on it.
Change according to the optical image of the
A charge latent image corresponding to the optical image of the object is formed on the end surface of the photoconductive layer member PCL facing the charge latent image holding member CHL of the recording medium RM in ReH.
The charge latent image formed on the end surface of the recording medium RM is recorded as a charge latent image on the charge latent image holding member CHL of the recording medium RM.

Next, when a color image is recorded by providing the three-color separation optical system CSA in front of the recording head ReH, the recording head ReH
In the transparent electrode Etw in H and the transparent electrode Et of the recording medium RM,
The electrode E in contact with the transparent electrode Et of the recording medium RM described above.
While the voltage is applied from the power supply Vb via the
Is formed on the photoconductive layer member PCL in the recording head ReH via the imaging lens L and the three-color separation system CSA,
The electric resistance value of the photoconductive layer member PCL in the recording head ReH is changed according to the optical image of the object O formed on the photoconductive layer member PCL, and the recording medium RM in the recording head ReH is changed.
Photoconductive layer member PCL facing the charge latent image holding member CHL
At the end surface of the recording medium RM, there are formed three charge latent image regions in which three types of charge latent images are formed in which the optical image of the subject is separated into three colors by the three-color separation optical system. The latent image holding member CHL is recorded in each area such as R, G, B in FIG. 11 as a charge latent image of a charge latent image area corresponding to the above-mentioned charge latent image area of each charge latent image area. .

By the way, the above-described three-color separation optical system CSA is illustrated in FIG. 10 as a whole perspective view thereof, and in FIG. 9 as a plan view for explaining the constitutional principle thereof. This 3
The color separation optical system CSA has a first imaging surface on which a first optical image is formed by light transmitted through both the first and second dichroic mirrors having different optical characteristics. In the state where the light reflected by the first dichroic mirror is reflected by the total reflection surface of the first prism so as to pass through the first prism, and the optical path length is extended in a predetermined manner, the second optical The second image forming surface on which an image is formed and the light reflected by the second dichroic mirror described above are reflected by the total reflection surface of the second prism so as to pass through the second prism, so that the optical path length is increased. 3rd in the stretched condition
The third image plane on which the optical image of is formed can be arranged in a straight line in the state of being close to each other in the same plane, and Dp in FIGS. 9 and 10 is A prism configured by orthogonally forming a dichroic mirror (R surface) that reflects red light and transmits green light and blue light and a dichroic mirror (B surface) that reflects blue light and transmits green light and red light. A form of dichroic mirror (dichroic prism Dp), Pr is a prism having a total reflection surface Mr, and Pb is a prism having a total reflection surface Mb.

In FIG. 9, when the light from the subject O enters the dichroic prism Dp through the imaging lens L, the dichroic mirror (R surface) and the dichroic mirror (B surface) are included in the light incident on the dichroic prism Dp. The green light component of the optical image of the subject that has passed through both
In the light incident on the dichroic prism Dp, the red light component of the optical image of the subject reflected by the surface of the dichroic mirror R is reflected in the total reflection surface of the prism Pr and then reflected in the prism Pr. Through the image plane Ig described above.
An image is formed on an image forming surface Ir which is in the same plane as that of the image forming surface Ig and is close to the image forming surface Ig, and is reflected by the surface of the dichroic mirror B in the light incident on the dichroic prism Dp. The blue light component of the optical image of the subject is the prism Pb
After passing through the prism Pb after being reflected by the total reflection surface of, the image forming surface that is in the same plane as the image forming surfaces Ig and Ir and that is close to the image forming surfaces Ig and Ir Image on Ib.

The three image planes Ig, Ir, and Ib are formed in the same plane as described above, and are arranged in a straight line. It is done like this. 3 shown in FIGS. 9 and 10
In the color separation optical system CSA, the prism Pr extends the optical path length of the red light, and the prism Pb extends the optical path length of the blue light to form the image forming surface Ig of the green light and the image forming of the red light as described above. The surface Ir and the image plane Ib of the blue light are in the same plane as described above, and are brought into a state in which they are arranged close to each other on a straight line, and the prism Pr, The extension amount X of the optical path length due to Pb is set to be equal to the shift amount a of the optical axis of each color light, that is, X = a. The extension amount X of the optical path length by the prisms Pr, Pb described above is
Assuming that the optical path length in Pb is d and the refractive index of the constituent material of the prisms Pr and Pb is n, X = d (n-1) / n. Therefore, the optical path lengths of the prisms Pr and Pb are as described above. In order to equalize the extension amount X of the light beams and the deviation amount a of the optical axis of each color light, the optical path length d in the prisms Pr and Pb and the refractive index n of the constituent material of the prisms Pr and Pb are changed. You can

Like the three-color separation optical system CSA of the above-mentioned configuration mode, three image forming planes Ir, Ig, which are formed in close proximity to each other in a straight line in the same plane.
When a color separation optical system in which an optical image of an object separated into individual colors is formed on Ib is used, three high resolution images are arranged in parallel at the positions of the plurality of image formation planes. Is imaged at.

Therefore, in the charge latent image recording apparatus shown in FIG. 8, in a state where a constant voltage is applied by the power supply Vb between the transparent electrode Etw of the recording head ReH and the electrode Et of the recording medium RM, An optical image of the subject O is formed on the photoconductive layer member PCL of the recording head ReH through the imaging lens L and the above-described three-color separation optical system CSA in a straight line and in close proximity to each other. When separated into individual colors and imaged on the image planes Ir, Ig, Ib, the electric resistance value of the photoconductive layer member PCL in the recording head ReH changes according to the optical image of the object O imaged thereon. The photoconductive layer member PCL, which faces the charge latent image holding member CHL of the recording medium RM in the recording head ReH, displays the optical image of the subject in three colors in the color separation fringe filter F. Three types of charge latent images separated into the colors of strips A charge latent image area in which the image is formed is formed.

The charge latent image corresponding to the optical image of the subject in the charge latent image area formed on the end surface of the photoconductive layer member PCL as described above, the charge latent image holding member CHL in the recording medium RM, the respective charge described above. It is recorded in each area such as R, G, and B in FIG. 11 as a charge latent image of the charge latent image area corresponding to the charge latent image of the latent image area. In addition, in FIG. 11, an arrow X
Indicates the main scanning direction, and arrow Y indicates the sub scanning direction.

During the recording operation, the charge latent image holding member C of the end surface of the photoconductive layer member PCL and the recording medium RM in the recording head ReH described above.
Both HL and HL are in a close contact state, or a minute gap is formed between the two, and when the recording medium RM is rotated or rotated by the end of the recording operation for one recording / reproducing area, The end surface of the photoconductive layer member PCL in the optical image-charge image conversion element and the charge latent image holding member CHL of the recording medium RM are separated from each other.

Now, the structure and operation of the recording system described in the lower part of the broken line in the drawing in the reproducing apparatus for charge latent image recording of the present invention shown in FIG. 7 have already been described with reference to FIG. This is the same as the color image recording apparatus. Incidentally, EA shown in the lower part of FIG. 7 is an erasing device for erasing the recorded contents which have already been recorded in the form of a charge latent image on the recording medium RM before performing new recording.

The reproducing apparatus for charge latent image recording according to the present invention shown in FIG. 7 deflects the reading light RL emitted from the light source PS of the reading light RL after passing through a polarizer PL provided as necessary. It is supplied to the optical reading head Hr and the recording medium RM via the fθ lens 14 as light in a state of being given to the device PDEF and being deflected by the optical deflector PDEF in a predetermined deflection mode.

As the above-mentioned optical deflector PDFE, in the case where the photodetector PD used in the reproducing apparatus for charge latent image recording is a line sensor,
The line sensor is used in such a deflection mode that the read light RL that is deflected in only one direction can be incident, and the photodetector PD used in the reproduction apparatus for charge latent image recording is In the case of a two-dimensional sensor, a deflection mode is used that allows the read light RL that is deflected in two directions orthogonal to the two-dimensional sensor to be incident.

The read light RL deflected in a predetermined deflection mode by the optical deflector PDEF is incident on the optical read head Hr via the fθ lens 14 as described above, but the optical read head Hr is Since it is arranged close to the recording medium RM, the modulation material layer member PML in the optical read head Hr
Is the optical read head Hr according to the electric field distribution due to the charge amount distribution in the charge latent image recorded on the recording medium RM.
The read light RL in a state in which the polarization plane of the read light RL passing through is changed is emitted, and the read light RL is a transparent recording medium RM.
And then enters the analyzer AL via the fθ lens 15.

In the analyzer AL, the light intensity changes strongly depending on the state of rotation of the polarization plane in the read light RL incident on it, and the light is supplied to the photodetector PD.
A time-series electric signal corresponding to the charge amount distribution in the charge latent image recorded in the RM is sent to the output terminal 1.

As described above, the time-series electric signal sent from the photodetector PD to the output terminal 1 is scanned by the reading light RL in which the charge latent image recorded on the recording medium RM is optically deflected by the optical deflector PDEF. It goes without saying that the electrical signals are time-series according to the scanning mode.

It should be understood that the recording medium RM should also be sub-scanned in a predetermined sub-scanning manner in accordance with the above-mentioned optical deflection manner in the optical deflector PDEF.
It is moved toward 17 in a predetermined movement mode. The signal output from the photodetector PD can be supplied to a video display device and used as a soft copy, or supplied to a printer to obtain a hard copy for use.

In the embodiment of the reproducing apparatus for charge latent image recording of the present invention shown in FIG. 7, the recording system shown in the portion below the broken line in FIG. The recorded recording medium on which the recorded information is recorded as a charge latent image is moved as shown by an arrow 17 in FIG. 7, and the above-mentioned recording is performed by the reproducing system shown in the portion above the broken line in FIG. Although it is configured to be able to reproduce the recorded information of the recorded recording medium,
In the practice of the present invention, a recording system and a reproducing system are separated, and a recorded recording medium recorded by the recording system is removed from the recording system, and the reproducing system is arranged in a spatial position different from that of the recording system. It is needless to say that the reproducing device for charge latent image recording may be configured as a configuration in which the recording information can be reproduced from the recorded recording medium by carrying it to a reproducing system.

The signals output from each of the embodiments described so far are:
The signal may be processed as necessary to obtain a hard copy supplied to the printer, a display device may be used to obtain a soft copy, a file device may be used to make a file, or recoding media
The recording medium RM can be used in various ways such as storing the recording medium RM in a state where information is recorded on the charge latent image holding member CHL of the RM and reusing it later, and read as optical information. It is also possible to perform signal processing of the processed information in the state of optical information and use it.

(Effects of the Invention) As is apparent from the details described above, the reproducing apparatus for charge latent image recording according to the present invention has a light source for reading light, which emits reading light, and a light in the wavelength range of the reading light. A transparent storage medium and a transparent electrode are laminated on at least a recording medium capable of recording information to be read as a charge latent image, and transparent to light in the wavelength range of read light. An optical reading head formed by laminating at least a transparent electrode and a light modulation material layer member, and the state of light changes corresponding to a charge latent image recorded on the recording medium, And a polarizing plate for converting read light transmitted through the recording medium into a light exhibiting a change in light intensity according to a charge latent image on the recording medium. From the light source to the polarizing plate In the path, the charge retention layer in the recording medium and the light modulation material layer member in the optical read head are provided.
Since the charge-latent-image recording reproducing devices are arranged so as to face each other in close proximity to each other, the charge-latent image recording reproducing device of the present invention can easily generate a video signal from which a reproduced image of high definition can be obtained. Therefore, the conventional problems described above can be favorably solved by the present invention.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a charge-latent-image recording reproducing apparatus for explaining the configuration principle and operation principle of a charge-latent image recording reproducing apparatus of the present invention, and FIGS. FIG. 4 is a side sectional view of an optical reading head including a light modulating material layer member, and FIGS. 4 to 7 are block diagrams of different constitutional aspects of the reproducing apparatus for charge latent image recording of the present invention. FIG. 8 is a block diagram showing an example of a recording apparatus used to form a charge latent image on a recording medium, FIG. 9 is a plan view of an example configuration of a three-color separation optical system, and FIG. 10 is shown in FIG. FIG. 11 is a perspective view of the three-color separation optical system of FIG. 11, and FIG. 11 is a plan view illustrating a recording / reproduction area formed by the three-color separation optical system shown in FIG. PS: light source for read light RL, PL: polarizer, Hr ... optical read head, RM ... recording medium for recording recorded information in the form of a latent charge image, Et, Etr, Etw ... transparent electrode, RL ... reading light, CHL ... charge latent image holding member, WP ... wavelength plate optionally provided when optically biasing the optical read head Hr, AL ... analyzer, PD ... Photodetector, PM
L: Light modulator layer member, CSA: 3-color separation optical system, E:
Electrodes, O ... Subject, BP, BP1, BP2 ... Substrate, 1 ... Output terminal, 2,3 ... Alignment film, 4,5 ... Partition, L, 6-9 ... Lens, 10 ... Screen , 11 …… Cylindrical lens,
12 …… Line sensor, 13 …… Movement stage, 16 …… Arrow in the direction of movement of the movement stage,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Den Asakura, 12-12 Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture, Japan Victor Company of Japan, Ltd. (72) Masato Furuya 3--12, Moriya-cho, Kanagawa-ku, Yokohama Address: Victor Company of Japan, Ltd. (72) Yumichi Tai, Inventor: 3-12 Moriya-cho, Kanagawa-ku, Yokohama City, Kanagawa Prefecture Victor Company of Japan, Ltd.

Claims (1)

[Claims] 1. Information to be read, comprising at least a read light source that emits read light, a charge holding layer transparent to light in the wavelength range of the read light, and a transparent electrode. A recording medium capable of recording as a charge latent image, an optical reading head formed by stacking at least a transparent electrode transparent to light in the wavelength range of read light and a light modulation material layer member, The state of light changes corresponding to the charge latent image recorded on the recording medium, and the read light transmitted through the optical read head and the recording medium is converted into a charge latent image on the recording medium. And a charge holding layer in the recording medium in the optical path from the light source of the reading light to the polarizing plate. Light modulation material layer in read head Preparative charge latent image recording and reproducing apparatus which is disposed to face in close proximity to each other