JPS5866464A - Solid-state color picture input device - Google Patents

Abstract

PURPOSE:To obtain a small-sized picture input device, by locating a solid state photodetecting element array having the same length as the reading width of an original picture at the position close to the original picture. CONSTITUTION:An original picture 3 is carried toward an arrow (f) by means of feed rollers 1a and 1b and pinch rollers 2a and 2b. The light sent from the picture 3 which is irradiated by an illuminating light source array 9 is condensed by focusing rod lens arrays 10R, 10G and 10B and forms images at solid state photodetecting elements 12R, 12G and 12B respectively. In this case, only the color information of red, green and blue are fed to the arrays 12R, 12G and 12B which are set at the front part of these arrays by color separating filters 11R, 11G and 11B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small color image input device in which a solid-state light receiving element array having the same size as the reading width of an original image is arranged close to the original image.

With the development of IC technology, the length of one chip is 20~30s+
One-dimensional solid-state photodetector gamma rays, such as CDs (charge-coupled devices), MOS, etc., have been developed, in which several dozen photodetectors are mounted in a fin image sensor, video camera, 7-axis I It is applied to many things. An outline of the conventional general configuration of the scanning system and photoelectric conversion system of the color image input device using the one-dimensional solid-state photodetector 7-ray described above is wX1.
It is as shown in the figure. That is, feed p-ra la
, lb and pinch rollers 2m and 2b, the original image 3 is sent in the direction of arrow f, thereby performing sub-scanning.

When the one-dimensional solid-state light-receiving elements 7 rays 4 arranged perpendicularly to the direction of movement of the original image 3 electrically scan themselves, main scanning is performed. As for the optical system, the original 11 is illuminated by a linear light source S such as a discharge lamp or a fluorescent lamp installed perpendicularly to the direction in which the original 3 travels.
The light from i1i3 is reduced and focused by lens 6, and further divided into three by f-ray T. The three divided lights are separated by red, green, and color separation filters SR and 8G, respectively.
, passes through 8B and is connected to solid-state photodetector 7 ray 4.
The mirror T and color separation filters 8R and 8G.

In place of the 8B, a dielectric mirror that simultaneously performs spectroscopy and color separation may be used. In this way,
The color information for original picture 3 is red for each line.

The solid-state light receiving element 7 ray 4 outputs electrical signals R, G, and B corresponding to the three colors green and blue.

Now, in such a conventional image input device, as mentioned above, the size of one chip of the solid-state light receiving element 7 ray 4 is 20~
Since it is small at 301 m, it is usually necessary to reduce and image the original Fii3 using a lens optical system.

For this reason, the optical path length from the original image 3 to the solid-state photodetector array 4 is large and complicated, making it difficult to downsize the device and making it difficult to adjust the image formation.

This invention was made to solve the above-mentioned drawbacks, and uses 7 rays of solid-state photodetectors whose chip length is the same as the reading width of the original image, and places these 7 rays of solid-state photodetectors close to the original image. The purpose is to provide a compact color image input device. Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 2 shows an embodiment of the present invention, in which the same reference numerals as in FIG.
A light source 7 for illuminating the original image 3 arranged perpendicularly to the ray, 1
0R, 10G, and 10B are three focusing rod lenses for red, green, and blue that are made of glass fiber or the like and have voice points on the same line of the original image 3.
B is each of the above-mentioned focusing rod/lens 7 rays IOR, IOG
.

This is a color separation filter for red, green, and blue provided behind 10B. 12R, 12G, and 12B are three red colors having the same dimensions as the reading width of the original image 3.

This is a one-dimensional solid-state light receiving element array for green and blue, and is arranged behind the color separation filters 11R, ffG, and flB, respectively.

To explain these effects, light from the original image 3 is illuminated by an illumination light source 7 ray 9 such as a line filament lamp or a one-dimensional array of red, green, and blue light emitting diodes.

3 focusing rod lenses 7 rays 10R, HIG.

10BK, and imaged on the solid-state light receiving element 7 rays 12R, 12G, and 12B.

At this time, three solid-state photodetector arrays (12R, 12G
.

12B, each solid state light receiving element 7 ray 12R, 12G.

Color separation filter 11R2jjG placed in front of 12B
, 11B, only the color information of red, green, and back is input, respectively. Therefore, three solid-state photodetectors 7 rays 12
From R, 12G, and 12B, electrical signals R, G, and B corresponding to color information of red, green, and blue for one line of the original image 3 are obtained simultaneously.

Furthermore, drive the feed p-ra 1a and 1b to move the original image 3 to the arrow!
You can read the desired color screen by moving in the direction. In this way, the solid-state photodetector 7 rays 12R, 12 have a chip length that is the same as the reading width of the original image 3.
When G and 12B are used, the optical path length of the photoelectric conversion system is shorter than that of K, and at the same time, the configuration is simpler, which has the effect of making it easier to downsize the device.

In the above embodiment, the focus of the three photoelectric conversion systems is set to the same row of the original image 3, but the focus of the three photoelectric conversion systems is set to any row of the original image 3. In this case, the difference in distance between each row on the original image 3 in which each photoelectric conversion system is in focus can be electrically corrected without impairing the effects of the present invention.

that's all! As mentioned in I2, this invention uses seven one-dimensional solid-state photodetector elements with a chip length that is the same as the reading width of the original image, and these are placed close to the original image, so that the optical path length of the photoelectric conversion system can be reduced. Because it is short and easy to configure,
This has the advantage of providing a small and simple color image input device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a scanning system and photoelectric conversion system of a conventional general color image input device, and FIG. 2 is a block diagram showing an embodiment of the present invention.

Claims (1)

[Claims] It is equipped with a light source for illuminating the original image, a color filter that separates the light from the original image into red, green, and colored light, and a one-dimensional solid-state light receiving element 7 ray that photoelectrically converts the light from each of these color filters. A color editor input device for reading color information of an original picture line by line, characterized in that seven rays of solid-state light receiving elements having a chip length equal to the reading width of the original picture are used and are arranged close to the original picture. A solid-state color image input device.