JPS60140974A - Photoelectric reader of picture - Google Patents

Abstract

PURPOSE:To enhance resolution and to decrease crosstalks by bundling optical fibers by plural number of fibers, by setting each light emitting and receiving element common to optical fibers and arranging a tip at the side of a picture of optical fibers in such a way that light emitting and receiving elements become a different pair. CONSTITUTION:When optical fibers 4 and 5 are nine pairs of light emitting/receiving elements, they are bundled by three pieces, for instance, 4-a, 4-b and 4-c, and 5-a, 5-b and 5-c. In this case light emitting elements 2 and light receiving elements 4 are bundled by three, set common to optical fibers such as (a), (b) and (c), and tips at the side of pictures of optical fibers are so arranged to become a different pair. Optical fibers have flexibility; therefore their arrangement is extremely easy. For nine pairs of optical fibers, three light emitting and receiving elements each are sufficient. Moreover flexibility of optical fibers are advantageous when they are incorporated in a small case, and miniaturization can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a photoelectric image reading device using an original fiber.

(Prior Art) Currently, when inputting characters and figures written on paper into personal computers, computers, and facsimiles, an area sensor method or a line sensor method is used. In particular, the latter has features such as higher resolution and lower cost than the former. However, currently, optical systems such as lenses are used in the light input part of the line sensor method, and there are problems with miniaturization.

<Purpose of the Invention> The present invention solves this problem by using original fibers for the input and output parts of light, and by taking advantage of the characteristics of optical fibers, it is possible to
The present invention provides a photoelectric image reading device that has high resolution, can reduce crosstalk, etc., has a simple configuration, and can be made more compact.

<Example> An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 shows a perspective view of the exterior, and Fig. 2 shows a sectional view.

The case 1 includes a light emitting element 2, a light receiving element 3, a light emitting optical fiber 4, a light receiving fiber 5, etc., and the light emitted from the light emitting element 2 passes through the light emitting optical fiber 4 and reads a reading paper 6 etc. illuminated on the screen. Then, the reflected light passes through the light-receiving optical fiber 5 again and enters the light-receiving element 3, where it is converted into an electrical signal. Arrow A indicates the mechanical scanning direction.

FIG. 3 is a plan view showing the head surface of FIGS. 1 and 2;
For example, as shown in the figure, the optical fiber 4.5 is 9.
In the case of this set, each optical fiber 4°5 is connected to 4-a
, 4-b, 4-c and 5-a.

They are separated into three pieces each such as 5-b and 5-c.

Here, there are three light emitting elements 2 and three light receiving elements 4 (see Figure 2), which are common to each of the optical fibers a, b, and c, and the tips of the optical fibers on the screen side are They are arranged in different pairs.

The original fiber is flexible and the arrangement described above is extremely easy. In addition, a set of 9 optical fibers 4 and 5
On the other hand, as in the above embodiment, only three light-emitting elements 2 and three light-receiving elements 3 are required, and the flexibility of the optical fiber is very advantageous when it is incorporated into a small case, and further miniaturization can be achieved.

By using optical fibers, the transmission efficiency of optical signals is increased, and larger signals can be obtained, which is advantageous for later signal processing circuits.

This also leads to an increase in S/N ratio and resolution.

Regarding the resolution, it is possible to solve the problem by using an optical fiber with a thickness corresponding to the desired resolution, but furthermore, by time-divisionally driving a plurality of light emitting elements, it is possible to reduce Talostalk and increase the resolution. In the embodiment described above, the three light emitting elements 2 are driven in a time-division manner and emit light in sequence. By using such a simple time division scheme, crosstalk can be reduced and resolution can be further increased in the above example.

<Effects of the Invention> As described above, according to the present invention, it is possible to provide a useful optical mil reading device that is miniaturized, has high resolution, and can reduce crosstalk.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view, and FIG. 3 is a plan view showing the head surface. l...Case, 2...Light emitting element, 3...Light receiving element,
4... Light emitting side optical fiber, 5... Light receiving side optical fiber, 6... Reading paper surface. Agent Patent attorney Aihiko Fukushi (and 2 others) 1st Ward Pit 2, 1 fP, 3rd 1st Procedural Amendment April 23, 1980 To the Commissioner of the Japan Patent Office (To the Patent Office) 2 Name of the invention Photoelectric type Image reading device 3, Relationship with the case of the person making the amendment Patent applicant address: 22-22 Nagaike-cho, Abeno-ku, Osaka, Kumo 545, 7, Contents of the amendment (1) Attachment of the scope of claims in the specification Correct as shown below. (2) Correct the description of "Light-receiving element 4" on page 12 line 12 of specification (3) to [Light-receiving element 3] 0 (3) Correct Figure 3 of the drawing as shown in the attached sheet 0 or more 2, Claim 1: Electricity generated by irradiating light output from a light emitting element in a line shape onto a screen of characters or figures using an optical fiber as a medium, and then inputting the reflected light to a light receiving element through the optical fiber and scanning it. In an apparatus for detecting changes in optical output, the optical fibers are grouped into multiple pieces, and each of the light emitting elements and light receiving elements are made common to each group of optical fibers, and the tip of the optical fiber on the screen side is connected to the light emitting element. 1. A photoelectric image reading device characterized in that a photodetector and a photodetector are arranged in different pairs. Figure 3

Claims (1)

[Claims] 1. Light output from a light-emitting element is irradiated in a line shape on a screen of characters and figures using an optical fiber as a nose medium,
In a device that detects the change in electrical output caused by inputting the reflected light back into the light receiving element through the optical fiber (-) and scanning it, the above-mentioned optical fibers are combined into multiple pieces and the above 6 light-emitting elements and the light-receiving element are connected to each other. A photoelectric image reading device characterized in that the light-emitting element and the light-receiving element are arranged in common to all nine fibers, and the ends of the optical fibers on the screen side are arranged in different pairs. .