JPH0813101B2 - Electric signal generator corresponding to surface potential distribution - Google Patents

Description

The present invention relates to a device for generating an electric signal corresponding to a surface potential distribution.

(Prior Art) In response to the increasing demand for high-quality and high-resolution reproduced images in recent years, the
It is well known that new methods such as so-called EDTV and HDTV have been proposed, but in order to obtain high-quality and high-resolution playback images, high-quality and high-resolution playback is required. An image pickup device capable of generating a video signal capable of reproducing an image is required, but in an image pickup device using an image pickup tube 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. To solve the above points,
The applicant company first obtained a high-resolution optical image with an imaging device using a light-to-light conversion element, and then used the light-to-charge conversion element to obtain a high-resolution optical image on a recording medium having a charge storage layer. We have proposed an image pickup method and a recording method that are recorded as a charge image having a.

(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. When the imaging system and the recording system are implemented by the applicant company so as to record a charge image having a high resolution on the recording medium, it is necessary to read the charge image recorded on the recording medium as an electric signal. Therefore, the means for that were required.

(Means for Solving Problems) The present invention is directed to a read head constituted by laminating a transparent electrode, a light modulation material layer member, and a dielectric mirror, and the dielectric mirror side of the read head is the object of detection. Means for arranging in close proximity to the detection target having a surface potential distribution, means for injecting a laser light beam deflected in a predetermined direction from the transparent electrode side of the read head, and laser emitted from the read head It is configured by laminating a transparent electrode, a light modulation material layer member, and a dielectric mirror, a device for generating an electric signal corresponding to a surface potential distribution, which comprises means for applying a light flux to a photoelectric conversion element through an analyzer. Read head,
Means for disposing the dielectric mirror side thereof close to an object to be detected having a surface potential distribution targeted for detection;
A means for injecting a laser beam having a linear cross section from the transparent electrode side of the read head and a laser beam having a linear cross section emitted from the read head are given to a line image sensor via an analyzer. And a read head composed of a transparent electrode, a light modulation material layer member, and a dielectric mirror laminated on the dielectric mirror side. Means for arranging in close proximity to an object to be detected having a surface potential distribution to be detected, and means for making a laser beam having a planar cross section expanded by a beam expander enter from the transparent electrode side of the read head. And a line beam in which the laser beam emitted from the reading head is driven and displaced in the sub-scanning direction through an analyzer. And a device for generating an electric signal corresponding to the surface potential distribution, and a read head constituted by laminating a transparent electrode, a light modulation material layer member, and a dielectric mirror. Means for arranging the mirror side in close proximity to the object to be detected having a surface potential distribution to be detected, and a laser beam having a planar cross section enlarged by a beam expander from the transparent electrode side of the above-mentioned read head are incident. A device for generating an electric signal corresponding to the surface potential distribution, which comprises means for causing the laser beam emitted from the read head to be given to the two-dimensional image sensor through an analyzer.

(Example) Hereinafter, specific contents of a device for generating an electric signal corresponding to a surface potential distribution of the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 are perspective views of different embodiments of an electric signal generator corresponding to the surface potential distribution of the present invention.

1 to 4, LS is a laser light source, 1 is a polarizer provided as necessary, 4 is a beam splitter, 5
Is a wave plate provided as necessary, 6 is an analyzer, 0 is an object whose surface potential is to be detected, Hr is a read head, and the read head Hr is, for example, a transparent electrode Et.
And light modulation material layer member PML {light modulation material layer member PML exhibiting characteristics such that the state of light can be changed by an applied voltage
(For example, a lithium niobate single crystal having an electro-optical effect or a material layer for light modulation such as a layer of a nematic liquid crystal exhibiting an electric field scattering effect may be used.)} And a dielectric mirror DML are laminated. A read head configured as described above can be used.

Further, in FIG. 1, reference numeral 2 is a rotary mirror wheel, 3 is an fθ lens, and 7 is a condenser lens. The rotary mirror wheel 2 is rotated continuously in the direction of the arrow in the drawing to provide a laser light source. The laser light emitted from the LS is deflected in a certain direction. As the laser light beam deflecting means in the apparatus shown in FIG. 1, an electric light deflector may be used instead of the mechanical light deflecting means such as the rotating mirror wheel 2 shown in the drawing. Of course.

Further, in FIG. 2, 3 is a lens, 8 is a cylindrical lens, 9 is a line image sensor, 10 in FIGS. 3 and 4 is a beam expander, 11 in FIG. 3 is a line image sensor, In Fig. 4
Reference numeral 12 is a two-dimensional image sensor.

Also in the electric signal generator corresponding to the surface potential distribution shown in FIGS. 1 and 2, the object to be detected O and the read head Hr are relatively displaced in the direction perpendicular to the paper surface. As a result, an electric signal for a two-dimensional charge image on the object to be detected O can be generated.

First, in the electric signal generator corresponding to the surface potential distribution of the present invention shown in FIG.
The laser beam emitted from the laser beam is linearly polarized with a predetermined polarization plane by a polarizer 1 provided as necessary, and then is deflected in a fixed direction by a rotating mirror wheel 2 to form an fθ lens 3 Is incident on.

Since the laser light flux emitted from the fθ lens 3 passes through the beam splitter 4 and enters the read head Hr,
The laser beam described above scans the same line in the read head Hr at a constant linear velocity.

As described above, the read head Hr has the transparent electrode Et and the light modulation material layer member PML {a light modulation material layer member PML (for example, which has an electro-optical effect) which has a characteristic that the state of light can be changed by an applied voltage. Lithium niobate single crystal,
Alternatively, a material layer for light modulation such as a layer of nematic liquid crystal exhibiting an electric field scattering effect may be used)} and a dielectric mirror DML are laminated, and the dielectric mirror DML side thereof is covered. The light modulation material layer member PML in the read head Hr is arranged so as to closely face the surface of the detection object O, and an electric field generated by the detection object O is given to the light modulation material layer member PML via the dielectric mirror DML. Therefore, the laser beam incident on the read head Hr as described above is transmitted by the dielectric mirror DML in the charge image read head Hr.
The state of light passing through the light modulation material layer member PML (the angle of the polarization plane in the case of the above example) changes according to the electric field generated by the charge pattern applied to the side.

Therefore, as described above, the laser light flux incident from the transparent electrode Et side of the read head Hr passes through the light modulation material layer member PML, is reflected by the dielectric mirror DML, and then passes through the light modulation material layer member PML again to be transparent. The state of the light emitted from the surface of the electrode Et (the angle of the polarization plane in the case of the above example) is changed corresponding to the potential distribution of the charge image on the detected object O. .

As described above, the light emitted from the read head Hr is in a state in which the incident light on the read head Hr has the amount of rotation of the polarization plane changed according to the surface potential distribution on the object to be detected. Therefore, after the emitted light from the read head Hr is reflected by the beam splitter 4, a wavelength plate 5 for adjusting the light amount, which is provided as necessary, and a rotation amount of the polarization plane for converting the rotation amount into a change in brightness. Through the analyzer 6, the condensing lens 7
When the photoelectric converter PD is placed at the position of the condensing point of the condensing lens 7, the photoelectric converter PD causes each one-dimensional charge image on the detected object O to be detected. An electric signal (video signal) whose amplitude changes in accordance with the amount of charges in the portion can be obtained. By moving the detected object O and the read head Hr relatively in the direction perpendicular to the paper surface, the photoelectric converter PD
From, an electric signal (video signal) whose amplitude changes in accordance with the amount of electric charge in each part of the two-dimensional electric charge image on the object to be detected O can be obtained.

As described above, the video signal output from the photoelectric converter PD corresponds to the charge amount distribution in the two-dimensional charge image having high definition on the detected object O. Therefore, when a laser beam having a diameter of 1 micron is used as the reading light, a video signal corresponding to a high resolution of 1000 lines / 1 mm can be generated.

Next, in the electric signal generator corresponding to the surface potential distribution of the present invention shown in FIG.
The laser light beam emitted from the laser beam is converted into a linearly polarized light beam having a predetermined polarization plane by a polarizer 1 provided as necessary, and then converted into a light beam beam having a linear cross section by a cylindrical lens 8 and incident on the lesbian 3. To be done.

The laser light flux emitted from the lens 3 passes through the beam splitter 4 and enters the read head Hr as one linear light flux. As described above, the read head Hr has the transparent electrode Et.
And light modulation material layer member PML {light modulation material layer member PML exhibiting characteristics such that the state of light can be changed by an applied voltage
(For example, a lithium niobate single crystal having an electro-optical effect or a material layer for light modulation such as a layer of a nematic liquid crystal exhibiting an electric field scattering effect may be used.)} And a dielectric mirror DML are laminated. And the dielectric mirror DML side of the dielectric mirror DML is arranged so as to closely face the surface of the object to be detected O, and the dielectric material layer member PML in the read head Hr is provided with the above-mentioned dielectric material. Since the electric field from the object to be detected O is given through the mirror DML, the laser light flux incident on the read head Hr is given to the side of the dielectric mirror DML of the charge image read head Hr as described above. The state of light passing through the light modulation material layer member PML (the angle of the polarization plane in the above example) changes according to the electric field generated by the generated charge pattern.

Therefore, as described above, the laser light flux incident from the transparent electrode Et side of the read head Hr passes through the light modulation material layer member PML, is reflected by the dielectric mirror DML, and then passes through the light modulation material layer member PML again to be transparent. The state of the light emitted from the surface of the electrode Et (the angle of the polarization plane in the case of the above example) is changed corresponding to the potential distribution of the charge image on the detected object O. .

As described above, the laser beam having a straight-line cross-sectional shape emitted from the read head Hr is the laser beam having a straight-line cross-sectional shape incident on the read head Hr.
The state in which the amount of rotation of the polarization plane is changed in accordance with the surface potential distribution in FIG. Therefore, after the emitted light from the read head Hr is reflected by the beam splitter 4, a wavelength plate 5 for adjusting the light amount, which is provided as necessary, and a rotation amount of the polarization plane for converting the rotation amount into a change in brightness. When incident on the line image sensor 9 through the analyzer 6, the amplitude changes from the line image sensor 9 in accordance with the charge amount of each part of the one-dimensional charge image on the object O to be detected. An electric signal (video signal) is obtained. Therefore, if the detection object O and the read head Hr are moved relatively in the direction perpendicular to the paper surface, each part of the two-dimensional charge image on the detection object O is detected from the line image sensor 0. An electric signal (video signal) whose amplitude changes according to the amount of electric charges of

The line image sensor 9 is displaced by a minute distance in the direction in which the pixels are arranged so that the same charge image is read a plurality of times, and an output signal obtained at that time is obtained. Can also be combined to generate a high definition video signal.

Next, in the electric signal generator corresponding to the surface potential distribution of the present invention shown in FIG.
The laser beam emitted from the laser beam is converted into linearly polarized light having a predetermined polarization plane by a polarizer 1 provided as necessary, and then converted into a large-diameter laser beam by a beam expander 10 and incident on a beam splitter 4. To do. The laser light flux transmitted through the beam splitter 4 enters the read head Hr.

As described above, the read head Hr has the transparent electrode Et and the light modulation material layer member PML {a light modulation material layer member PML (for example, which has an electro-optical effect) which has a characteristic that the state of light can be changed by an applied voltage. Lithium niobate single crystal,
Alternatively, a material layer for light modulation such as a layer of nematic liquid crystal exhibiting an electric field scattering effect may be used)} and a dielectric mirror DML are laminated, and the dielectric mirror DML side thereof is covered. The light modulation material layer member PML in the read head Hr is arranged so as to closely face the surface of the detection object O, and an electric field generated by the detection object O is given to the light modulation material layer member PML via the dielectric mirror DML. Therefore, the laser beam incident on the read head Hr as described above is transmitted by the dielectric mirror DML in the charge image read head Hr.
The state of light passing through the light modulation material layer member PML (the angle of the polarization plane in the case of the above example) changes according to the electric field generated by the charge pattern applied to the side.

Therefore, as described above, the laser light flux incident from the transparent electrode Et side of the read head Hr passes through the light modulation material layer member PML, is reflected by the dielectric mirror DML, and then passes through the light modulation material layer member PML again to be transparent. The state of the light emitted from the surface of the electrode Et (the angle of the polarization plane in the case of the above example) is changed corresponding to the potential distribution of the charge image on the detected object O. .

As described above, the laser light having a wide surface shape emitted from the read head Hr is a laser light having a wide surface shape that is incident on the read head Hr, and the rotation amount of the polarization plane is changed according to the surface potential distribution in the object O to be detected. Is in a changing state. Therefore, after the emitted light from the read head Hr is reflected by the beam splitter 4, a wavelength plate 5 for adjusting the light amount, which is provided as necessary, and a rotation amount of the polarization plane for converting the rotation amount into a change in brightness. A line image sensor which is sub-scanning in the direction of the thick arrow in FIG. 3 via the analyzer 6.
When it is incident on 11, an electric signal (video signal) whose amplitude changes according to the amount of electric charge in each part of the two-dimensional electric charge image on the object to be detected O is obtained from the line image sensor 9.

The line image sensor 9 is displaced by a minute distance in the direction in which the pixels are arranged so that the same charge image is read a plurality of times, and an output signal obtained at that time is obtained. Can also be combined to generate a high definition video signal.

Next, in the electric signal generator corresponding to the surface potential distribution of the present invention shown in FIG.
The laser beam emitted from the laser beam is converted into linearly polarized light having a predetermined polarization plane by a polarizer 1 provided as necessary, and then converted into a large-diameter laser beam by a beam expander 10 and incident on a beam splitter 4. To do. The laser light flux transmitted through the beam splitter 4 enters the read head Hr.

As described above, the read head Hr has the transparent electrode Et and the light modulation material layer member PML {a light modulation material layer member PML (for example, which has an electro-optical effect) which has a characteristic that the state of light can be changed by an applied voltage. Lithium niobate single crystal,
Alternatively, a material layer for light modulation such as a layer of nematic liquid crystal exhibiting an electric field scattering effect may be used)} and a dielectric mirror DML are laminated, and the dielectric mirror DML side thereof is covered. The light modulation material layer member PML in the read head Hr is arranged so as to closely face the surface of the detection object O, and an electric field generated by the detection object O is given to the light modulation material layer member PML via the dielectric mirror DML. Therefore, the laser beam incident on the read head Hr as described above is transmitted by the dielectric mirror DML in the charge image read head Hr.
The state of light passing through the light modulation material layer member PML (the angle of the polarization plane in the case of the above example) changes according to the electric field generated by the charge pattern applied to the side.

Therefore, as described above, the laser light flux incident from the transparent electrode Et side of the read head Hr passes through the light modulation material layer member PML, is reflected by the dielectric mirror DML, and then passes through the light modulation material layer member PML again to be transparent. The state of the light emitted from the surface of the electrode Et (the angle of the polarization plane in the case of the above example) is changed corresponding to the potential distribution of the charge image on the detected object O. .

As described above, the laser light having a wide surface shape emitted from the read head Hr is a laser light having a wide surface shape that is incident on the read head Hr, and the rotation amount of the polarization plane is changed according to the surface potential distribution in the object O to be detected. Is in a changing state. Therefore, after the emitted light from the read head Hr is reflected by the beam splitter 4, a wavelength plate 5 for adjusting the light amount, which is provided as necessary, and a rotation amount of the polarization plane for converting the rotation amount into a change in brightness. When the light is incident on the two-dimensional image sensor 12 via the analyzer 6, the amplitude changes from the two-dimensional image sensor 12 in accordance with the charge amount of each part of the two-dimensional charge image on the detected object O. An electric signal (video signal) is being obtained.

The two-dimensional image sensor 12 described above is displaced by a minute distance in the direction in which the pixels are arranged so that the same charge image is read a plurality of times, and the output obtained at that time is obtained. It is also possible to synthesize the signals to generate a high definition video signal.

(Effect of the Invention) As is clear from the above description, the read head constituted by laminating the transparent electrode, the light modulation material layer member, and the dielectric mirror of the present invention has a dielectric mirror. Means for arranging in close proximity to the object to be detected having a surface potential distribution whose side is the object of detection, and means for injecting a laser light beam deflected in a predetermined direction from the transparent electrode side of the read head, A device for generating an electric signal corresponding to a surface potential distribution, which comprises means for giving a laser beam emitted from the reading head to a photoelectric conversion element through an analyzer, a transparent electrode, a light modulation material layer member, and a dielectric. A means for arranging a read head constituted by laminating a mirror and a dielectric mirror side thereof close to an object to be detected having a surface potential distribution targeted for detection; Means for injecting a laser beam having a linear cross section from the transparent electrode side of the read head, and means for giving a laser beam having a linear cross section emitted from the read head to the line image sensor via an analyzer. A device for generating an electric signal corresponding to the surface potential distribution, and a read head constituted by laminating a transparent electrode, a light modulation material layer member and a dielectric mirror, the dielectric mirror side of which is used for detection. A means for placing the object to be detected having a surface potential distribution in close proximity to the object, and a means for injecting a laser beam having a planar cross section enlarged by a beam expander from the transparent electrode side of the read head, The line image sensor in which the laser beam emitted from the reading head is driven and displaced in the sub-scanning direction through the analyzer. A read head composed of a transparent electrode, a light modulation material layer member, and a dielectric mirror, and a device for generating an electric signal corresponding to the surface potential distribution. Means for arranging the mirror side in close proximity to the object to be detected having a surface potential distribution to be detected, and a laser beam having a planar cross section enlarged by a beam expander from the transparent electrode side of the above-mentioned read head are incident. And a means for applying the laser light flux emitted from the read head to the two-dimensional image sensor through the analyzer, the electric potential generator corresponding to the surface potential distribution. In the electric signal generator that corresponds to the surface potential distribution, the charge image recorded as a charge image is recorded with an optical reading means to provide high image quality and high resolution. A video signal capable of regenerating a reproduced image is as it can be generated easily, can be satisfactorily solve the conventional problems, according the surface potential distribution and the generator of the corresponding electrical signals of the present invention.

[Brief description of drawings]

1 to 4 are perspective views of different embodiments of an electric signal generator corresponding to the surface potential distribution of the present invention. LS ... laser light source, 1 ... polarizer, 4 ... beam splitter, 5 ... wave plate, 6 ... analyzer, O ... detected object on which surface potential should be detected, Hr ... reading head , Et
...... Transparent electrode, PML ...... Light modulation material layer member, DML ...... Dielectric mirror, 2 ...... Rotating mirror wheel, 3 ...... Lens, 7 ...... Condensing lens, 8 ...... Cylindrical lens, 9 ...... Line Image sensor, 10 …… Beam expander, 11 …… Line image sensor, 12 …… Two-dimensional image sensor,

Front page continuation (72) Inventor Asakura, 3-12 Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa Japan Victor Company of Japan (72) Masato Furuya 3--12, Moriya-cho, Kanagawa-ku, Yokohama Japan Victor Co., Ltd.

Claims (4)

[Claims] 1. A read head having a transparent electrode, a light modulation material layer member, and a dielectric mirror laminated on each other, and a dielectric mirror side of the read head being a detection target having a surface potential distribution. Means for arranging the laser light beam deflected in a predetermined direction from the transparent electrode side of the reading head, and a laser light beam emitted from the reading head for photoelectric conversion through an analyzer. A device for generating an electric signal corresponding to the surface potential distribution, which comprises means for supplying the conversion element. 2. A read head comprising a transparent electrode, a light modulation material layer member, and a dielectric mirror laminated on each other, and an object to be detected having a surface potential distribution whose dielectric mirror side is the object of detection. Means for arranging the laser beam having a linear cross section from the transparent electrode side of the read head, and a laser beam having a linear cross section emitted from the read head for analyzing. For generating an electric signal corresponding to the surface potential distribution, which comprises means for supplying the line image sensor via the 3. An object to be detected having a surface potential distribution in which a dielectric mirror side of a read head is formed by laminating a transparent electrode, a light modulation material layer member and a dielectric mirror. A means for arranging the laser light flux having a planar cross section enlarged by a beam expander from the transparent electrode side of the read head, and a laser light flux emitted from the read head for the analyzer. And a means for giving to a line image sensor which is driven and displaced in the sub-scanning direction via a device for generating an electric signal corresponding to the surface potential distribution. 4. An object to be detected having a surface potential distribution in which a dielectric mirror side of a read head constituted by laminating a transparent electrode, a light modulation material layer member and a dielectric mirror is an object of detection. A means for arranging the laser light flux having a planar cross section enlarged by a beam expander from the transparent electrode side of the read head, and a laser light flux emitted from the read head for the analyzer. For generating an electric signal corresponding to the surface potential distribution, which includes means for giving a two-dimensional image sensor through the same.