JPH0482363A - Facsimile equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a facsimile machine using a light beam deflection device.

(Prior Art) Conventionally, a light beam scanning facsimile device has been proposed as a high-speed, high-resolution facsimile device that uses a galvanometer mirror scanner to read a document image and record received image information. .

(Problem to be Solved by the Invention) However, in the above-mentioned conventional light beam scanning type facsimile machine, the drive system of the galvanometer mirror scanner is a moving magnet or a moving coil, so power consumption is large and high-speed scanning is difficult. In addition to this problem, there was also the problem that it would become large if a detection system for detecting the rotation angle was included.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile machine that solves the above problems by using a light beam deflection device.

(Means for Solving the Problems) A facsimile apparatus according to a first aspect of the present invention comprises a fixed mirror, a rotating mirror facing the fixed mirror, and a driving means for driving the rotating mirror to rotate back and forth over a predetermined range. and a scanning mirror section that deflects the laser beam incident on the rotating mirror by zigzag multiple reflection between the rotating mirror and the fixed mirror and outputs the laser beam, and the laser beam is deflected by the scanning mirror section. a reading means that scans the document surface in an arc shape with a laser beam and reads the document from changes in the intensity of the reflected laser beam; and a laser beam whose intensity is modulated according to recorded data and is deflected by the scanning mirror section The present invention is characterized in that facsimile communication is carried out between facsimile machines equipped with a recording means that performs recording by scanning a photosensitive paper surface in an arc shape.

A facsimile apparatus according to a second aspect of the present invention is provided with a data arrangement converting means for converting data arranged by circular scanning into a data arrangement obtained by linear scanning, and converting data arranged by linear scanning into a data arrangement obtained by circular scanning, and a recording means. , the received linear scanning data is intensity-modulated by data that is converted into an arcuate scanning data arrangement by the data arrangement converting means, and the photosensitive paper surface is scanned in an arcuate manner with a laser beam that is deflected by the scanning mirror section. The reading means is a reading means that scans the document surface in an arc shape with a laser beam deflected by the scanning mirror section and reads the document from changes in the intensity of the reflected laser beam. The present invention is characterized in that the read data read by the reading means is converted by the data arrangement converting means into a data arrangement based on linear scanning, and then used as data for transmission.

(Function) The facsimile machine according to the first aspect of the present invention configured as described above scans the document surface in an arc shape with a laser beam deflected by the scanning mirror section, and detects the document from changes in the intensity of the reflected laser beam. is read, the intensity is modulated in accordance with the recording data, and recording is performed by scanning the surface of the photosensitive paper in an arc shape with a laser beam that is deflected by the scanning mirror section.

Therefore, facsimile communication can be carried out without any problem between such facsimile machines that perform reading and recording by circular scanning.

Further, in the facsimile apparatus according to the second aspect of the present invention, when recording received linear scanning data, the data arrangement converting means converts the received data into an arcuate scanning data arrangement, intensity modulates the data by the converted data, and deflects the data by the scanning mirror section. Recording is performed by scanning the surface of the photosensitive paper in an arc shape with a laser beam, and during reading, the document is read from changes in the intensity of the reflected laser light that scans the surface of the document in an arc shape, and the read data is The data is converted into a data arrangement based on linear scanning and then sent as data for transmission. Therefore, there is no problem in facsimile communication with conventional facsimile devices.

(Example) The present invention will be explained below using examples.

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, particularly showing the light beam scanning system.

A laser beam with an elliptical cross section emitted from the semiconductor laser 2 enters the collimating lens 4, which converts it into a parallel beam with a circular cross section, and a polarizing beam splitter and a quarter-wave plate 8. The light is reflected, the direction is changed by the mirror 1°, and the light is incident obliquely on the scanning mirror 22 [12] and is reflected for the first time, facing the rotating mirror 12. Aimed at the fixed mirror 14,
It is reflected by the fixed mirror 14 and rotates again! 12, where it undergoes a second reflection. Thereafter, after multiple zigzag reflections are performed several times in the same manner, the light is emitted from the rotation fIt12.

Here, the scanning mirror section 22 includes a rotary mirror 12, a rotary shaft 16 to which the rotary mirror 12 is fixed, and a laminated piezoelectric material as a drive source that drives the fixed mirror 14 and the rotary shaft 16 to reciprocate over a predetermined range. The rotary shaft 16 is rotatably driven in a reciprocating manner by a couple of two laminated piezoelectric actuators 18.20. Rotation by the couple j! 12 is driven to reciprocate and rotate. Furthermore, rotating mirror 1
Regarding drive No. 2, two laminated piezoelectric actuators 18 are used so that the light beam emitted from the rotary mirror 12 scans the target scanning surface at a constant speed over a predetermined range.
．． 20 is driven and controlled by voltage control or injection charge control. Furthermore, in order to reduce the driving load, the portion of the rotating mirror 12 that is not irradiated with the laser beam is a notch.

The light beam deflected by the scanning mirror section 22 passes through the condensing lens 24, is reflected upward by a rotatably supported flat plate reflection@26, and is condensed and irradiated onto the surface of the original 28. . By reflection from the reflecting mirror 26, the light beam scans the surface of the original to be read 28, which is sequentially driven in the direction of the arrow, over a predetermined range on a circular arc at a constant speed as shown by reference numeral 30. Read the image.

As shown in FIG. 2, the condensing lens 24 is located between the mirror image position 32 of the rotating shaft 16 and the original to be read 28, and the original to be read 28 is arranged at the focal point of the condensing lens 24. Therefore, the light beam is always irradiated perpendicularly onto the document 28 to be read.

Therefore, the light beam that reads the original image and is reflected from the surface of the original to be read travels backward along the optical path from which it came. The light beam reflected on the surface of the original to be read is intensity-modulated, as if amplitude-modulated, along with the original image of the original to be read.

The reversely traveling light beam is converted into linearly polarized light whose polarization angle is rotated by 90 degrees from that at the time of incidence at the 174-wavelength plate 8, reflected by the polarizing beam splitter 6, and sent through a condensing lens 34 to a light detector composed of, for example, a photodiode. The signal is converted into an electrical signal by a device 36. The output signal of the photodetector 36 is a signal whose amplitude is modulated according to the original image of the original to be read 28, and the image of the original to be read is read from the output signal level of the photodetector 36.

On the other hand, during printing, the reflection @26 is controlled to be rotated by 90 degrees from the case of reading the image of the original to be read 28, as shown by the broken line. The semiconductor laser 2 is excited by an excitation current on which a modulation signal accompanying image data transmitted via a telephone line is superimposed. The laser light emitted from the semiconductor laser by this excitation is intensity modulated in accordance with the transmitted image data. This intensity-modulated laser light travels through the same path as in the case of reading the original image of the original to be read until it reaches the reflecting mirror 26, and the reflecting mirror 26 is at a position rotated by 90 degrees as shown by the broken line. , the light beam is reflected downward by the reflecting mirror 26, and the light beam passes over the photosensitive surface of the roll-shaped photosensitive paper 38, which is rotated and sequentially drawn out, for example, on the broken line arc 30A corresponding to the reference numeral 30. is scanned over a predetermined range at a constant speed, and the photosensitive surface of the photosensitive paper 38 is exposed.

Therefore, the signal transmitted via the telephone line, that is, the original image read at the transmitting source, is photosensitively formed on the photosensitive surface of the photosensitive paper 38. Also in this case, as explained with reference to FIG.
8 is always irradiated perpendicularly onto the photosensitive surface. For this reason, the print density becomes uniform.

Next, expansion of the deflection angle due to multiple reflections in the scanning mirror section 22 will be explained.

FIGS. 3(a) and 3(b) show a plan view and a side view when the rotating mirror 12 faces the fixed mirror 14 in parallel. When the rotating mirror 12 faces the fixed mirror 14 in parallel, the incident laser beam 4o undergoes multiple zigzag reflections by the rotating mirror 12 and the fixed mirror 14, and finally reaches the rotating mirror fi.
12 and is emitted. In this case, the laser beam is not deflected when viewed from the side. Reference numeral 42 is the rotating mirror 12
It shows the laser light emitted from the

4(a) and (b) show a plan view and a side view when the rotation tR12 slightly rotates clockwise, and FIGS. 5(a) and (b) show a case where the rotation tR12 rotates counterclockwise. A plan view and a side view are shown in the case of slight rotation. When viewed from a plan view, each time the incident laser beam 40 is reflected by the rotating mirror 12, it is deflected by an angle twice as large as the rotating angle of the rotating mirror 12, and finally it is deflected by a large angle and rotates. The light is emitted from the mirror 12.

Further, as shown in FIG. 6, when the laser beam 40 enters the rotation 1lt12 from a direction that is not within the vertical plane of the rotation axis 16 and is reflected, the reflected laser beam 42 forms a conical shape as shown by the broken line. Since the above trajectory is drawn, the laser beam 42 follows an arcuate trajectory 30.30A on the scanned surface 44 of the original 28 and photosensitive paper 38, no matter what direction the scanned surface 44 is directed.
, and so-called arc-shaped distortion occurs. therefore,
In the first embodiment as well, arc-shaped distortion occurs around the mirror image position 32 of the rotation shaft 16 shown in FIGS. 3 and 4.

However, as shown in FIG. 7, the facsimile machine of the first embodiment! In the case of facsimile transmission between 100 and 100, even if the laser beam is scanned in the above-mentioned arc shape when reading the image of the original to be read 28 and recording the received image, the original scanned in the arc shape is Since the images are recorded using the same arc-shaped scan, the arc-shaped distortion is canceled out and the arc-shaped distortion does not become a problem. In FIG. 7, reference numeral 102 indicates a document reading/printing section equipped with the light beam scanning system shown in FIG. 1, and 104 indicates the document reading section 1.
The image data read by the semiconductor laser 2 is processed and transmitted, and the received image data is processed and sent to the semiconductor laser 2.
A transmitting/receiving unit converts the excitation current into a modulated signal to be superimposed on the excitation current and outputs the modulated signal to the document reading/printing unit 102, and 106 indicates a telephone line.

Next, a second embodiment of the present invention will be described. FIG. 8 is a block diagram showing the configuration of the second embodiment of the present invention.

The facsimile apparatus 110 of the second embodiment includes a document reading/printing section 102 equipped with the light beam scanning system of the first embodiment, a data array conversion section 108, and a transmitting/receiving section 104.

The data array conversion unit 108 is connected to a central control unit (CPU) 94 that controls data array conversion under the control of a controller 92 that controls the axis device 110, and an RO that stores a data conversion program and a conversion table to be described later.
It consists of an M96 and a RAM 98 having a data area for storing data and a work area.

The image data read by the original reading/printing unit 102 is the image data read by circular scanning as described above, and since the original 28 to be read is sequentially driven in the direction of the arrow in FIG. are as shown in arcuate zones g, g2, g3, etc. in Fig. 9. On the other hand, when the image is read by linearly scanning the surface of the original to be read 28, the rectangles G□, G2, G3, . . . in FIG. 9 are read.
It will look like this.

Arc band g, g2, g,..., rectangle G□, G2, G,
Each number in ... indicates a pixel.

As is clear from Fig. 9, the 61st row 1st in linear scanning
The pixels in the column correspond to the pixels in the g1 row and the first column in the arcuate scan, the pixels in the 00th row and the second column in the linear scan correspond to the pixels in the 62nd row and second column in the arciform scan, and similarly...
The pixel in the 61st row and 9th column in the linear scan corresponds to the pixel in the 25th row and the 10th column in the circular arc scan, and similarly...the pixel in the 01 row and 24th column in the straight scan corresponds to the pixel in the g1 row and the 26th column in the circular arc scan. It corresponds to the pixels in the column. Correspondences are similarly determined thereafter, and the data conversion table shown in FIG. 10 is created. This data conversion table is stored in the ROM96.

C receiving original image reading information from the controller 92
The PU 94 sequentially stores the read image data in the RAM 98, stores the stored image data in the ROM 96, converts it to a linear scanning image data arrangement by referring to a data conversion table, stores it in the RAM 98, and stores the stored image data in the RAM 98. The image data converted to the arrangement is read out and sent to the transmitting/receiving unit 1.
04.

Therefore, in the second embodiment, even if the signal is sent to the conventional facsimile machine 120, the receiving side can receive the signal as if it were received from the conventional facsimile machine.

Further, when receiving a transmission from the conventional facsimile device 120, the received image data that has been subjected to reception processing such as demodulation in the transmitting/receiving section 104 is sequentially stored in the RAM 98, and
The stored image data was stored in the ROM 96, and converted to an image data arrangement of arcuate scanning with reference to a data conversion table, contrary to the case of transmission, and stored in the RAM 98, where it was converted to an arrangement of 5 arcuate scanning. The image data is read out, converted into a signal corresponding to the read image data, outputted to the original reading/printing section 102 as a modulation signal to be superimposed on the excitation current of the semiconductor laser 2, and received by the original reading/printing section 102. Print according to image data.

Therefore, in the second embodiment, reception from the conventional facsimile machine 120 is the same as reception from the facsimile machine 100 according to the first embodiment.

Further, the data array converting section 108 is configured to be selectively connected between the document reading/printing section 102 and the transmitting/receiving section 104, so that when the communication partner is the facsimile machine 100 of the first embodiment, the data In the case of a conventional facsimile machine 120, the data array converter 108 may be connected between the document reading/printing section 102 and the transmitting/receiving section 104, by bypassing the array converting section 108.

Note that, as described above, since the data array is converted by table lookup, the data array can be converted electrically. If this is done by rotating the fixed mirror 14 by a small angle in synchronization with the reciprocating rotational movement of the rotating mirror 12, and correcting the arcuate scanning into linear scanning, the control of the small rotation angle of the fixed fi 14 will be Since it is not proportional to the rotation angle of the rotary mirror 12, it is extremely difficult to accurately correct the arc-shaped distortion to achieve linear scanning, and the second embodiment eliminates the need for such a configuration.

Next, an application example of the second embodiment will be explained.

The reading unit 122 and the reading unit 12 excluding the printed part by the light beam scanning system of the facsimile machine shown in FIG.
The data reading device 124 includes a data layout converting unit 128 that converts the data read by the data reading device 12 into a data layout based on linear scanning.
The output data from 4 is input to a display device, for example, a CRT 126, and the data read by the reading device 124 is displayed on the CRT 126.

The data reading device 124 configured in this manner can be applied to a barcode reader, an optical card reader, and a laser scanning microscope.

In addition, in the above-mentioned embodiment, the rotating fi12 has a trapezoidal cross section with a cutout in the portion not hit by the laser beam in order to reduce the driving force, but if the driving force of the drive system is sufficient, the cross-sectional shape is rectangular. There is no problem in forming it. In addition, a laminated piezoelectric actuator 18.2 that applies a couple force to the rotation shaft 16
0 can be driven even with a single laminated piezoelectric actuator if a suitable bearing is used. Furthermore, for example, a configuration may be adopted in which the driving force required for the laminated piezoelectric actuator is reduced by combining it with an angle enlarging mechanism using a lever mechanism. In addition, instead of a laminated piezoelectric actuator, the actuator can use a piezoelectric element with electrodes attached to make torsional motion, a giant magnetostrictive alloy such as chilphenol-D, or a force such as hydraulic pressure, air pressure, thermal deformation, etc. is possible.

(Effects of the Invention) As explained above, according to the facsimile apparatus of the present invention, since the laser beam is multiple-reflected in a zigzag manner in the scanning mirror section, the scanning mirror section drive system for causing multiple reflections in the scanning mirror section This has the effect of requiring less driving force.

In addition, the scanned surface is scanned in an arcuate manner during reading and recording, but the scanning of the scanned surface during reading and recording may interfere with facsimile communication between facsimile machines that scan in the same arcuate manner. There is no need to change scanning from arc scanning to linear scanning, and there is no need for a complicated configuration in the scanning mirror unit to change arc scanning to linear scanning.

In addition, by converting the data layout using a data layout conversion means that mutually converts the data layout between the arcuate scan and the straight line scan, the scan on the arc and the straight line scan are substantially converted. Conversion can be done by changing the arrangement of data, and the configuration can be simple.

Further, by providing the data arrangement conversion means, there is no problem in mutual facsimile communication with a conventional linear scanning facsimile machine.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention. FIG. 2 is an optical path diagram illustrating a part of the optical system according to the first embodiment of the present invention. 3 to 5 are explanatory diagrams of the expansion of the deflection angle by zigzag multiple reflection in the optical system of the first embodiment of the present invention. FIG. 6 is an explanatory diagram of arcuate scanning by the optical system of the first embodiment of the present invention. FIG. 7 is an explanatory diagram of the configuration of the first embodiment of the present invention in use. FIG. 8 is a configuration diagram of a second embodiment of the present invention. FIG. 9 is an image data array diagram showing an image data array based on circular scanning and an image data array based on linear scanning in the first embodiment of the present invention. FIG. 10 is a schematic diagram of a data array conversion table in the second embodiment of the present invention. FIG. 11 is a configuration diagram showing an application example of the second embodiment of the present invention. 2... Semiconductor laser, 4... Collimator lens, 6
...Polarizing beam splitter, 8...174 wavelength plate,
10 and 26...reflecting mirror, 12... rotating mirror, 14
...Fixed mirror, 16...Rotation axis, 18 and 20...
・Laminated piezoelectric actuator, 22 scanning mirror section, 24 and 34... condenser lens, 28... original to be read, 32... mirror image position, 36 photodetector, 380 round photosensitive paper, 40...・Incoming laser beam, 44... surface to be scanned,
100...Facsimile machine of the first embodiment, 106.
...Telephone line, 108...Data array conversion unit, 110
. . . Facsimile device of the second embodiment, 120 . . . Conventional facsimile device. 112 cause

Claims (2)

[Claims] (1) It has a fixed mirror, a rotating mirror facing the fixed mirror, and a driving means for driving the rotating mirror to rotate back and forth over a predetermined range,
and a scanning mirror unit that deflects the laser beam incident on the rotating mirror by zigzag multiple reflection between the rotating mirror and the fixed mirror and outputs the laser beam, and the laser beam deflected by the scanning mirror unit. A reading means scans the document surface in an arc shape and reads the document from changes in the intensity of the reflected laser beam, and a laser beam whose intensity is modulated according to recorded data and is deflected by the scanning mirror unit scans the photosensitive paper surface. What is claimed is: 1. A facsimile device that performs facsimile communication between facsimile devices that are equipped with recording means that performs recording by scanning in an arc shape. (2) having a fixed mirror, a rotating mirror facing the fixed mirror, and a driving means for driving the rotating mirror to rotate back and forth over a predetermined range;
and a scanning mirror section that deflects and emits a laser beam incident on the rotary mirror by zigzag multiple reflection between the rotary mirror and the fixed mirror, and a data arrangement that converts data by circular scanning into linear scanning. and a data arrangement conversion means for converting the linear scanning data into a data arrangement using circular scanning; a recording means for recording by scanning a photosensitive paper surface in an arc shape with a laser beam that is intensity modulated and deflected by the scanning mirror section; reading means for scanning the original document from changes in the intensity of the reflected laser beam, and converting the read data read by the reading means into a data arrangement by linear scanning by the data arrangement conversion means, and then transmitting the data. A facsimile device characterized by: