JPS5917767A - Facsimile scanning device - Google Patents

Abstract

PURPOSE:To perform the scanning for transmission/reception at the same device, by lighting a light source group consisting of many faint light sources, which are arranged to face an original or a recording material, individually in a prescribed order synchronously with a clock period. CONSTITUTION:The original or the photosensitive recording material 1 is moved at a transmission time or a reception time by feeding rollers 2 and 2' individually in the direction of an arrow P in a low speed. A light source group 3 where many faint light sources are arranged on a line QQ' orthogonal to the direction of the arrow P is allowed to face the original or the recording material 1, and a converging optical system 4 is arranged between the line QQ' and the light source group 3. An optical fiber group 5 is arranged at a prescribed angle to the line QQ', and the base end of the optical fiber group 5 is connected to a photoelectric conversion element 6, and the output is fed as an electric signal to a receiving device. Light sources of the light source group 3 are lit individually in a prescribed order synchronously with the clock signal, which is inputted to a terminal 8, by a circuit means consisting of a shift register 7 and a gate and hold 9, and the reflected light of the original 1 is converted to an electric signal by the element 6. At the reception time, faint light sources of the light source group 3 are lit by the time series electric signal converted in accordance with picture elements, and they are recorded on the recording material 1.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a plane scanning facsimile scanning device.

In particular, the present invention relates to a facsimile scanning device that has the functions of both a scanning device that converts an original image into an image signal and transmits it, and a scanning device that receives this image signal and records it as a received image.

[Description of prior art]

Conventional facsimile machines are equipped with a scanning device on the sending side that scans and moves a single light source conversion element relative to the original image screen in two orthogonal directions using mechanical means to convert it into an image signal. On the receiving side, a scanning device for recording received images is provided which scans and moves in synchronization with the scanning on the sending side, separate from the scanning device on the sending side. Therefore, there are two systems of scanning devices, which has the disadvantage that the facsimile machine as a whole becomes complicated.

[Purpose of the invention]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks, and aims to provide a facsimile scanning device with a simple structure, in which both sending and receiving scanning can be performed by the same device.

[Summary of the invention]

The present invention provides a light source group consisting of a large number of minute light sources arranged in accordance with an original picture or a recording medium, and a light source group consisting of a large number of minute light sources arranged in accordance with an original picture or a recording medium, and a light source group in which the minute light sources of this light source group are individually arranged in a predetermined order in synchronization with an r'-1 cycle. an optical system that irradiates the light emitted from the light source group to a corresponding position on the original image or recording medium; and an electrical signal that is generated by inputting the reflected light reflected by the pixels of the original image irradiated by the optical system. and a photoelectric conversion element for converting into
The circuit means is characterized in that it is configured to turn on the minute light sources of the light source group based on time-series electrical signals converted in accordance with the pixels.

[Explanation based on examples]

An explanation will be given below based on the drawings of the embodiment.

FIG. 1 is a perspective view of an embodiment of the present invention. (2) is an original image for transmission, and a photosensitive recording medium for reception. The original image or recording medium 1 is moved at a slow speed in the direction of arrow P by a feed roller 2.2''.

Now, suppose that a straight line Q-Q° is formed on this original image or recording medium 1 and is not perpendicular to this moving direction P. A light source group 3 in which a large number of minute light sources such as light emitting diodes are arranged is opposed to this straight line q'. A focusing optical system 4 such as an optical fiber group or a rod lens group is arranged between the straight line 0--Q' and the light source group 3. Further, on this straight line QQ', the optical fiber group 5 is arranged inclined at a predetermined angle.

Moreover, the base end of each optical fiber in the optical fiber group 5 is
As shown in Fig. 1, it is focused at a 1llil point, and is guided to a photoelectric conversion element 6 which has an appropriately sized light-receiving surface like a solar cell and has good responsiveness, and is connected as an electrical signal to a receiving device (not shown). be done. Each optical fiber in this optical fiber group 5 does not have to be independent, and this portion may be a plate-shaped light guide. Further, instead of the photoelectric conversion element 6, the light may be focused on the end face of another optical fiber and transmitted through the optical fiber.

FIG. 2 is an enlarged front view of this light source group 3 and optical system 4. The light emitting diodes 31, 32, arranged in rows face each other via an optical system 4 of optical fibers or rod lenses so that their light is directed onto the original or recording medium 1. During transmission, this light emitting diode 31
．． 32, - are repeatedly caused to emit light one by one in response to a clock signal, and at the time of reception, light is emitted sequentially in response to the presence or absence of a signal.

Further, FIG. 3 is a cross-sectional view of FIG. 2. As mentioned above, the irradiated portions of the light emitting diodes 3i, 32, -,
The tips of the optical fiber group 5 are on the same straight line Q on the original image 1.
-Q', for example, one light emitting diode 3a of the light source group 3 and the optical fiber group 5 and the optical fiber 5m face the same point q on the original image. Therefore, during transmission, when the light emitting diode 3a emits light, the light is incident on a point q, and reflected light with an intensity corresponding to the reflectance of this point q is incident on the optical fiber 5m. The inclination angle θ of this optical fiber 5m is approximately 60°.

With this configuration, the light emitting diode 3
1.32, -. are repeated at a high speed to emit light, and at the same time the original image 1 is moved at a slow speed in the direction of the arrow P.
The light that has passed through the optical system 4 of the optical fiber group or lot-lens group is directed onto the original image 1, and its point of incidence is on the straight line Q-'Q"
9 at a high speed and moves in the direction of arrow P at a slow speed.

In addition, at each incident point, reflected light with an intensity corresponding to the density of the original image falling at that point is generated, and this reflected light is transmitted to the optical fiber whose tip is in the vicinity of the above point among the optical fibers in the optical fiber group 5. incident.

The optical signal is made incident on the photoelectric conversion element 6 at the base end of the optical fiber group 5, so that a time-series electric signal obtained by decomposing the original image 1 into pixels can be extracted.

FIG. 4 is an example of a driving circuit for the light source group 3 of the light emitting diode array. A pulse signal is applied to the shift register 7 from an input terminal 8 every scanning period and is sequentially transferred at a clock frequency. At this time, if the gate and bold circuit 9 are short-circuited, the light emitting diodes 3□, 32, and - can be repeatedly lit in the order.

During reception, the electric signals sent in time series are applied to the input terminal 8 of the shift register 7, and when the signals for -scanning are input, the gate 1 of the gate and hold circuit 9 is applied.
is opened to hold each parallel output of the shift register 7. While the signal for the next scan is being applied to the shift register 7, the gate of the gate and hold circuit 9 is closed, and each bold circuit output of this circuit 9 is transmitted to a pixel on the straight line 0-Q' of the original image l. Light emitting diode 31 corresponding to the concentration
．． 32, - is lit. When the output of the hold circuit 9 corresponds to the signal for the next scan, the photosensitive recording medium 1
moves in the direction of arrow P at the same speed as the sending side, so
On the recording medium 1, recording portions corresponding to pixels can be reproduced.

In the above example, the light emitting diodes 3 are lit in the order in which the light emitting diodes 3 are arranged, but this order is not limited to the order in which the light emitting diodes 3 are arranged as long as it is a predetermined order.

〔Effect of the invention〕

As described above, according to the present invention, the imaging section for transmission and the recording section for reception can be performed by the same device, and mechanical scanning is not involved at all except in the feeding section of the original image or recording medium. Furthermore, since an optical system with a long focal point is not required, there is an excellent effect that a compact and extremely simple transmitting/receiving device can be formed.

Furthermore, since the transmitting light spot and the receiving light spot match, clear recording can be obtained without any pixel shift or so-called blurring in the receiving process. Of course, it is also possible to use transmitting and receiving functions independently, and it is possible to realize an extremely small and simple facsimile machine.

[Brief explanation of drawings]

FIG. 1 is an irradiation diagram of an apparatus according to an embodiment of the present invention. Figure 2 is an enlarged front view of the light source group and optical system. FIG. 3 is a cross-sectional side view of FIG. 2. FIG. 4 is a configuration diagram of the driving circuit for the light emitting diode. 1-original image or recording medium, 2-feeding roller, 3-light source group,
4-optical system, 5-optical fiber group, 6-photoelectric conversion element, 7
- shift register, 8 - input terminals, 9 - gate and hold circuit. Patent Applicant Kubo 1) Keiji Department Agent Patent Attorney Nao Takashi Ide 39 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) A light source group consisting of a large number of minute light sources arranged corresponding to the original picture or recording medium; a circuit means for individually lighting up the minute light sources of this light source group in a predetermined order in synchronization with a clock cycle; an optical system that irradiates light emitted from a light source group to a corresponding position on the original image or recording medium; and a photoelectric conversion element that receives reflected light reflected from pixels of the original image irradiated by this optical system and converts it into an electrical signal. When transmitting, the circuit means lights up the minute light sources individually in a predetermined order at a constant clock cycle, and when receiving,
The facsimile scanning device is characterized in that the circuit means is configured to turn on the minute light sources of the light source group based on time-series electrical signals converted in accordance with pixels.