JPS58111729A - Color resolving head - Google Patents

Abstract

PURPOSE:To form the compact, light, inexpensive color resolving head, by utilizing an optical fiber fundle, and performing the decomposition of a picture element and the spectral action into a plurality of color separating channels. CONSTITUTION:Reflected light (or transmitted light) 202 from a minute picture element point 201 on a lighted original picture 200 passes an image forming lens system 203, and the image of the image element point is formed on a front surface 205 of the optical fiber bumdle 204. Said optical fiber bundle 204 is a light transmitting path wherein many optical fibers are bundled. The end surface is divided into 206-208 for colors R, G, and B. The emitted lights from the fibers are guided to photoelectric transducer elements 212-214 through color separating filters 209-211. The light transmitting path 204 itself has the functions of color resolving slits, resolving into three color components, and the transmission path. In this way, the compact, light, inexpensive color resolving head can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a color separation head used in color facsimiles, color scanners for plate making, color meters, color pattern separation devices for textiles, etc., which are simple, small, lightweight, and inexpensive. It is an object of the present invention to provide a photodetection head for color or multicolor separation.

The color separation head, which is often used in conventional color photo transmission devices and plate-making scanners, has a structure as shown in FIG. ] 102 is taken out through an imaging lens thread 103 and an optical slit 104, and is separated into three envelope components: blue light 107, green light 1o8, and red light 109 by a blue light reflecting dichroic mirror 105 and a red light reflecting dichroic mirror 106, respectively. , and were made incident on the corresponding photoelectric conversion elements 110, 111, and 112 and converted into electrical signals.

In this case, in order to remove unnecessary leakage light of sideband components due to imperfections in the custom-made cut-off of the dichroic mirrors J06 and 106, an infrared cut filter 113 is installed at the front stage as shown in FIG. In front of the photoelectric conversion element, there is a trimming filter 114 for shaping, which has a band pass cycle for each color.
115, 116, etc. are often added.

In addition, in a plate-making scanner, a spectral channel called an unsharp mask is added to emphasize the outline of an image, as illustrated in FIG.

That is, although 104 to 116 shown in the figure are the same three-color separation system as in (b), the light @118 branched by the mirror 117 is passed through the unsharp slit 1 with a large diameter.
19 and an unsharp spectral filter 20, the fourth photoelectric conversion element 121 outputs the so-called PokeMask Quigone. Normally, this unsharp spectral filter 20 is designed to have the same spectral transmission customization as the green light channel representing the luminance signal, and uses the output of the photoelectric conversion element 112 of the green channel as a sharp signal, and combines this with the photoelectric conversion element. A difference signal with the unsharp signal of No. 121 is created and correction is performed for edge enhancement. This (C
) The configuration shown in the example above is very common in plate-making scanners, but it uses all expensive components such as a large number of sophisticated optical filters, slits, and their adjustment mechanisms, and the structure is complex and shaped.

Since the stacking is also large, the device is small and low-priced.
This is one of the factors that hinders this.

In contrast, the present invention provides a decomposition head that does not require sophisticated optical parts or adjustment mechanisms, has a simple structure, is compact, inexpensive, and has a simple structure.

The details of the present invention will be explained below using the drawings.

Figure 2 shows the basic configuration of an embodiment of the present invention, in which (a) shows the entire photodetection system, and (a) shows an example of the configuration of the optical fiber bundle, which is the central element of the present invention. ing.

In FIG. 2, reflected light (or transmitted light) 202 from minute pixel dots 201 of an illuminated original image 200 passes through an imaging lens system 203 and is applied to the front end surface 205 of optical fiber east 204 at the pixel dots. Tie the statue. Reference numeral 204 denotes a light transmission path that bundles a large number of optical fibers. In this example, which performs three-color separation, the rear end face is divided into three parts 206, 207, and 208 for each color, and each color is separated into three parts. The emitted light passes through the corresponding color separation filters 209, 210 and 211 and is guided to photoelectric conversion elements 212, 213 and 214.

FIGS. 2(b), (c), (d), and (e) respectively show examples of the arrangement of the front end surface 205 of the optical fiber bundle 204. R, G and Bll''l: red light and green light, respectively. An optical fiber line is used to extract the three color components of light and blue light.
The lines are collected at back end face 206 for red light detection, and the G and B lines are collected at back end faces 207 and 208 for green and blue light detection, respectively. As an example,
The shape and arrangement of the fiber east end face can take various configurations. Since the shape and dimensions of the front end surface 205 correspond to the shape and diameter of a slit in a conventional color separation system, it is easy to select the separation characteristics of pixel information according to the purpose by configuring the end surface 205. For example, the shape of the slit as an aperture for sample f in pixel space may be different from the conventional circular aperture as shown in Fig. 2(d).
It is known that diamond shapes such as 1 cedar or hexagonal shapes as shown in ) or (e) have better decomposition characteristics, and these shapes can be relatively easily used in the present invention.

shape can be realized. In this case, since the light reaching the outside of these end faces is completely blocked, the front end face 205 itself plays the role of a conventional slit, and the light transmission path 204 is made of plain wood. It functions as a spectral and optical transmission path to the three components. Therefore, it can be said that the implementation array of FIG. 2(a) can realize the same function as that of FIG. 1(b) more easily and at a lower cost.

FIG. 3 shows another embodiment in which a spectral channel for unsharpness is added.

In FIG. 3, the light from the pixel points on the original picture 300 is 3
01- The picture element area indicated by a is the optical fiber bundle 30
4, on the other hand, 301-
The peripheral area of the picture element indicated by b is the outer area 305 of the front end surface.
-b, respectively.

304 has rear end faces 306, 307, 308 and 315
The fiber bundles 306, 307, and 308 are divided into four fiber bundles shown in FIG.
Similar to 208, it is divided and assembled. Therefore, the emitted lights 306, 307, and 308 are red, corresponding to those in FIG. 2 above.

Green and blue color separation filters 309, 310 and 31
1 to each photoelectric conversion element 312, 313, and 314
The signals are guided to three color separation signals. On the other hand, the front end surface 305-b
The light that is imaged and emitted from the rear end surface 315 transmits the information of the surrounding area 301-b to 3O1-a to the picture element having a predetermined resolution 1 on the original screen, and Form an unsharp signal. The spectral filter 316 and the photoelectric conversion element 317 correspond to the spectral filter 120 and the photoelectric conversion element 121 for the unsharp channel shown in FIG. FIG. 4 shows the front end surface 30 of the optical fiber bundle 304 in FIG. 3.
5-a and 5-b, the fiber lines fR, G, and B are for three-color separation of red, green, and blue, and the fiber line for unsharp signals is indicated by U. FIG. 3(a) shows the embodiment of FIG. 3 [correspondingly, U, RlG, and B are arranged so as to surround the outside, but as shown in FIG. You can also do it. That is, in (a), the original image information regarding U corresponds to the donut-shaped rereg area and the central part is missing, but in (b) this can be supplemented. However, as mentioned above, the spectroscopy of the inner sharp signal and the outer unsharp signal is performed using a custom-made green passband filter, so even if the arrangement in (a) is used, the inner sharp signal and the outer unsharp signal are separated. By utilizing the fact that the output of the green channel is equivalent to the signal at the center of the end face of the unsharp signal, the above-mentioned figure 1 (C) can be obtained by adding and subtracting the electrical signals.
A contour signal equivalent to can be generated. Comparing the above configuration of FIG. 3 with the conventional example shown in FIG. 1(C),
It is clear that the configuration of the present invention can be realized more simply and at a lower cost. In the embodiment of FIG. 3, the optical fiber bundle 304 is shown enlarged to clarify the structure.
For example, the diameter of optical fiber wires actually used for defense is 3
The diameter of the imaging lens 30 is approximately 0 to 200 μm, and even if several tens or hundreds of lenses are bundled, the outer diameter will be at most 1 to 200 μm.
3 and one [hi and extremely small.

A vertical disassembly head can be configured.

Figures 5 and 6 show an example of the configuration of a pencil-type color separation head, and Figure 6 shows a column in which only the tip moves and scans using the flexibility of the fiber bundle, and Figure 6 shows a photoelectric conversion head. This is an example in which the elements are integrated and mounted on an XY plane scanning mechanism. In the drawings, the same parts as in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 5, reference numeral 320 denotes the tip of the head, which can be freely moved by the optical fiber bundle 304 so as to be able to scan an original image. 321 is fixed at a color signal detection section.

In FIG. 6, a color separation head H is constructed by integrating a head tip and a color signal detection section, and is configured to be scanned in the XY directions by an XY moving stage 322.

As described above, according to the present invention, it is possible to achieve a significantly smaller size and light weight compared to conventional optical systems, and therefore it is particularly suitable for flat-type color drawing reading devices.

Although the above column shows the case of three-color separation, it can of course be used for black-and-white separation of m colors, and can also be easily extended to multicolor separation of four or more colors by increasing the number of dividing channels. Needless to say. For example, it is also possible to obtain an infrared signal by selectively selecting a spectral filter and a photodetecting element.

As mentioned above, Akira Motoya utilizes optical fibers to perform pixel separation and spectral action on multiple color separation channels, and is a simple, compact, light, flexible, and inexpensive color separation system. It is possible to provide color separation devices for color images and compact "color facsimiles" that were previously expensive and complicated.
It is highly effective in terms of economy and economy.It is suitable for simple color separation heads for flat scanning of graphic input devices whose use is rapidly expanding, and recognition devices for multicolored figures, and is suitable for light pens for color detection. However, the effect of its use is great.

[Brief explanation of the drawing]

FIGS. 1(a), (b), and (c) are schematic configuration diagrams showing a conventional color separation head, and FIG. 2 is a diagram showing the basic configuration of a color separation head according to the present invention. A configuration diagram of the color separation head, (b) to (e) are front views showing the arrangement structure of the end faces of optical fibers for three-color separation, and Fig. 3 is an unsharp mask spectral channel fitting 1 for contour enhancement. □
・A perspective view showing an example of the structure of a color separation head of a four-color separation system, which is another embodiment of Ushitamoto Komei, Figures 4 (a) and (b)
is a front view showing an example of the end face arrangement of optical fibers for four-color separation used in the color separation head shown in Fig. 3, and Fig. 6 (ra)
, (b) shows the convenient column of the color separation head;
FIG. 6(a) is a sectional view of a color separation head of another embodiment, and FIG. 6(b) is a perspective view showing an example of its use. 200.300...Original picture, 201 axis...Pixel point, 203,303-...Imaging lens thread, 2o4
゜304・・・・Optical fiber bundle, 205,30
5-a, 305-b... Optical fiber bundle front end surface, 206-208.306-308.315---
--- Optical fiber bundle rear end surface, 209 to 211, 30
9~3111I・Fist e・・Color separation filter, 212~2
14°312-314, 317 @...Photoelectric conversion element. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Figure 3 Figure 4rI! J (αl
(b) Figure 5

Claims (4)

[Claims] (1) The reflected light or transmitted light from the subject is focused on the first end surface of an optical fiber bundle formed by bundling a large number of optical fiber lines, and the other end of the optical fiber bundle is formed with a plurality of small fibers. A second end face group is formed by dividing and bundling into a bundle group, and the incident light on the first end face is dividedly emitted from the plurality of second end face groups, and this emitted light is transmitted to the second end face group.
1. A color separation head characterized in that color separation signals are obtained by guiding the color separation signals to a plurality of color separation filter groups and a plurality of photoelectric conversion element groups provided opposite to an end face group of the color separation head. (2) Each optical fiber line on the first end face is spatially regularly arranged, and the division and distribution of each fiber line from the first end face to the second end face group is also performed spatially evenly and regularly. A color separation head according to claim 1, characterized in that: (3) The color separation head according to claim 1, wherein the fiber lines are divided and distributed randomly from the first end face to the second end face group. (4) A plurality of picture element areas including the central picture element point of interest of the subject and surrounding picture elements are formed on the first end face, and at least one of the second end faces is formed on the inner picture element point. The optical fiber line of the first end face is divided and distributed to the second end face group so that information including points is extracted, and the other second end face group extracts information on the central picture element Toru. A color separation head according to claim 1.