JP2696803B2 - Image recording device using color filter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus for recording an electrostatic latent image on a charge holding medium, and can perform clear image recording even when a color filter is used. The present invention relates to such an image recording apparatus.

[Conventional technology]

Conventionally, silver halide photography, electrophotography, television photography, photography using a solid-state image sensor (CCD, etc.) have been used as high-resolution photography techniques. If the resolution is high, the processing steps are complicated, and if the steps are simple, there is a lack of a storage function or a basic deterioration in image quality.

The applicant responded to these questions with high quality, high resolution, simple processing steps, long storage times, and the ability to store the stored text, line drawings, images, and code (1,0) information according to the purpose. A method of forming an electrostatic latent image on a charge storage medium by voltage application exposure, which can arbitrarily repeat recording and reproduction with high image quality, has already been proposed (Japanese Patent Application No. 63-121592).

FIG. 5 is a diagram for explaining a conventional image recording / reproducing method. In the figure, 105 is a color filter, 109 is a photoreceptor, 10
9a is a glass substrate, 109b is a transparent electrode, 109c is a photoconductive layer, 11
0 is a charge holding medium, 110a is an insulating layer, 110b is an electrode, and 110c is a substrate.

FIG. 5 shows an embodiment in which exposure is performed from the photoreceptor side. First, a photoconductive layer supporting substrate 109a made of 1 mm thick glass is used.
A transparent photoreceptor electrode 109b made of ITO having a thickness of 1000 mm is formed thereon, and a photoconductive layer 109c of about 10 μm is formed thereon to form the photoreceptor 109. Further, a color filter is integrally formed on the support substrate 109a. This photoconductor 10
9 with respect to the charge holding medium 110 through a gap of about 10 μm.
Is arranged. The charge storage medium 110 is formed by vapor-depositing a 1000-mm thick Al electrode 110b on an insulating layer supporting substrate 110c made of glass having a thickness of 1 mm, and forming an insulating layer 110a having a thickness of 10 μm on the electrode 110b.
Is formed.

In such a configuration, the photoconductor 109 and the charge holding medium 1
10 and the photoreceptor electrode 109b and the charge holding medium 11
When an image is exposed through the color filter 105 while a voltage is applied between the photoconductive layer 109c and the electrode 110b, the photoconductive layer 109c becomes conductive in a portion irradiated with light, and the photoconductive layer 109c becomes electrically conductive with the charge holding medium corresponding to the position. A strong electric field is applied to the voids, causing discharge, and as a result, charges corresponding to the image are accumulated on the charge holding medium.

[Problems to be solved by the invention]

By the way, as shown in FIG.
Is formed integrally on a glass substrate and a color image is to be recorded.If an image is formed at, for example, a point P on the color filter 105, the image at the point P is spread and blurred on the transparent electrode 109b. Therefore, the resolution of the electrostatic latent image formed on the insulating layer 110a is deteriorated.

On the other hand, when image exposure is performed so as to form an image on the transparent electrode 109b, the image is blurred in the color filter 105, so that the electrostatic latent image recorded in the same manner causes color blur.

In addition, since the photoconductor and the color filter are integrally formed, there is a problem in that an expensive filter expands and contracts or discolors due to heat in a heating process that is inevitably involved in a photoconductor manufacturing process, and accuracy is deteriorated. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides an image recording apparatus using a color filter which has good resolution, does not cause color blur, and can prevent deterioration of the accuracy of the color filter. The purpose is to do.

[Means for solving the problem]

For this purpose, the present invention provides a photoconductor in which a transparent electrode and a photoconductive layer are laminated on a glass substrate, and a charge holding medium in which an electrode and an insulating layer are laminated on a substrate, and a color filter on the front surface of the photoconductor. Is an image recording apparatus that records an analog electrostatic latent image corresponding to an incident optical image on a charge holding medium by applying a voltage between both electrodes and exposing the image to an image. And a second optical system for forming an image of the color filter on which the subject image is formed near the transparent electrode of the photoconductor is disposed on the front surface of the photoconductor. I do.

[Action]

According to the present invention, an image is formed on a color filter disposed on the front surface of the photoconductor, and this image is formed near the transparent electrode of the photoconductor by an optical system. A high-resolution electrostatic latent image can be recorded without blurring of the image in the conductive layer portion.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a view for explaining the image recording apparatus of the present invention. In the figure, the same numbers as those in FIG. 5 indicate the same contents. Note that 101 is an object, 103 is a first optical system, 105 is a color filter, 107 is a second optical system, and 109 is a photoconductor. First
In the electrostatic latent image recording apparatus described with reference to FIG. 5, a color filter 105
A second optical system 107 is arranged so that an image of the color filter 105 is formed near the transparent electrode 109b of the photoconductor.

First, an image of the object 101 is formed on the color filter 105 by the first optical system 103. Then, the image of the color filter 105 is formed by the second optical system 107 on the transparent electrode 109b, more specifically, on the photoconductive layer. By performing image exposure in this manner, the photoconductive layer 109c shows a conductive pattern corresponding to the image formed on the color filter 105, and an electrostatic latent image is formed on a charge holding medium (not shown) corresponding to this pattern. Be recorded. As a result, it is possible to prevent image blur and color blur from occurring.

FIG. 2 is a view showing another embodiment of the present invention. In FIG. 2, the second optical system 107 is composed of a columnar lens array whose refractive index changes in a parabolic manner from the central axis toward the outer periphery, that is, a so-called cell hoc lens 111. And a color filter 105 laminated with a transparent spacer having a predetermined thickness, for example, a glass substrate 113 interposed therebetween.

With such a configuration, the color filter 10
Since the image No. 5 can be formed in the vicinity of the transparent electrode 109b, a high-resolution electrostatic latent image can be obtained without causing color blur.

This cell hook lens 111 is, as shown in FIG.
The object plane 120 and the image plane 122 are located symmetrically with respect to the lens 111, and constitute a lens system with a magnification of 1.

Accordingly, in FIG. 2, the glass substrate 113 and the insulating layer 109a
Since the image of the color filter 105 can be formed at the transparent electrode 109b and the place by stacking the layers with the same thickness, the image of the object is formed on the color filter, thereby achieving high resolution. In addition, an image free from color blur can be recorded.

In addition, by disposing the color filter and the photoconductor separately, these can be manufactured in separate processes, so that the precision is prevented from deteriorating due to expansion and contraction or discoloration of the expensive color filter due to heat. can do.

FIG. 4 is a view showing another embodiment of the present invention, and shows an example in which a cylindrical lens is used as the second optical system 107 in FIG.

The cylindrical lens is a lens system having power in one direction and no power in a direction orthogonal thereto, so that a circular object such as 140 is formed as an elliptical image 142. Therefore, if such a cylindrical lens is used as the second optical system, it becomes possible to perform image recording with a magnification function.

Although not shown, if a Fresnel lens is used as the second optical system, it is possible to record an image of a large image with a small device, and to use a convex lens, a concave mirror, or the like to enlarge or reduce the image. It is possible to record an image.

〔The invention's effect〕

As described above, according to the present invention, the color filter is arranged on the front surface of the photoreceptor, and the image of the color filter is formed near the transparent electrode of the photoreceptor. And a high-resolution electrostatic latent image can be recorded. Further, since the color filter and the photoconductor can be separately manufactured, it is possible to prevent the accuracy of the color filter from deteriorating in the manufacturing process of the photoconductor.

[Brief description of the drawings]

FIG. 1 is a view for explaining an image recording apparatus of the present invention, FIGS. 2 and 3 are views for explaining another embodiment of the present invention using a cell hook lens, and FIG. 4 is a cylindrical view. FIG. 5 is a view showing another embodiment of the present invention using a lens, and FIG. 5 is a view for explaining a conventional image recording / reproducing method. 103 first optical system 105 color filter 107
Second optical system 109 photoreceptor 111 cell hoc lens.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-241475 (JP, A) JP-A-63-1163 (JP, A) JP-A-60-232563 (JP, A) JP-A 51- 9838 (JP, A) JP-A-53-100249 (JP, A) JP-A-62-161255 (JP, U)

Claims (3)

(57) [Claims] 1. A photoconductor in which a transparent electrode and a photoconductive layer are laminated on a glass substrate and a charge holding medium in which an electrode and an insulating layer are laminated on a substrate are arranged to face each other, and a color filter is provided on the front surface of the photoconductor. An image recording apparatus for arranging an electrostatic latent image corresponding to an incident optical image on a charge holding medium by applying a voltage between both electrodes and exposing the image to an image. A first optical system for imaging;
An image recording apparatus using a color filter, wherein a second optical system for forming an image of a color filter on which a subject image is formed near a transparent electrode of a photoconductor is disposed on a front surface of the photoconductor. 2. The optical system according to claim 1, wherein a columnar lens array having a refractive index distributed in a parabolic shape from the central axis toward the outer peripheral surface is laminated on a glass substrate. 2. An image recording apparatus using a color filter according to claim 1, wherein the color filters are laminated via a transparent spacer having a thickness. 3. An image recording apparatus using a color filter according to claim 1, wherein said optical system comprises a Fresnel lens, a concave mirror or a cylindrical lens.