JPS61214239A - Data writing device of card original plate - Google Patents

Abstract

PURPOSE:To eliminate the error due to play to write data with a high precision by writing data on a PC card, whose movement is controlled with an XY stage, only when it is fed in one of X and Y directions. CONSTITUTION:An optical card PC is placed on an XY stage 100 and is controlled to move in X and Y directions by a computer. Only when the PC card is fed in one of X and Y directions, a lase 201 is turned on the write data. That is, a bar BR is written from a prescribed position by a still laser beam when the card is moved in the Y direction, and pits PT are written from a prescribed position by oscillating the laser beam by a mirror 205 when the card is moved in the X direction. Thus, the error due to play of a gear or the like is eliminated to write data with a high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an original plate production device for an optical data recording card (hereinafter referred to as an optical card), and particularly to a data writing device.

[Technical background and problems]

2. Description of the Related Art In recent years, in addition to magnetic cards, which have been widely used in cash cards, credit cards, etc., optical cards have been attracting attention, along with IC cards, as cards that can record data at higher density.

This optical card is formed by laminating a light reflective layer, a non-silver chloride photosensitive layer, and a protective layer on a base material such as vinyl chloride, and is made by shining a light beam onto the originally transparent non-silver chloride photosensitive layer. By blackening, data recording is performed while the light reflecting layer does not function in that portion. This data recording is performed using a combination of long linear pieces called bars and bits and short oval pieces, and these bars and bits are required to be regularly arranged.

Therefore, the optical card master must be created with high precision.

However, since these bars and bits have a width of several micrometers and must be arranged at intervals of about 10 to 20 micrometers, it is difficult to maintain the precision of the writing mechanism as required. No device has been provided to record data satisfactorily.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and an object of the present invention is to provide an apparatus that records data with high precision on an optical card master.

[Summary of the invention]

In order to achieve this objective, in the present invention, when the XY stage on which the original optical card is placed is transported in the X direction and the Y direction,
In order to prevent play in the movement of each element including the gears in the feeding mechanism, writing was performed only during unidirectional feeding in each of the X and Y directions, and laser light was irradiated from the bottom of the card original to adhere to the card original. This prevents writing errors caused by dust and makes it easier to insert S into bits by roughly vibrating the laser beam.

〔Example〕

The present invention will be described below by way of example with reference to the accompanying drawings.

FIG. 1 conceptually shows the configuration of the device according to the present invention, which is an optical card on which data that can be optically read by a PC is written, and is placed on an XY stage 100 and provided inside. Data is recorded by irradiating the photosensitive layer with a laser beam. The reason why the XY stage 100 is used is to sequentially move the writing position on the original optical card, and the movement control of this optical card PC is performed by the computer 30.
A drive device (not shown) of the XY stage 100 moves the optical card PC in the X direction and the Y direction in response to a control signal S (x, y) from the optical card 1. Each moving part of the XY stage 100 in the X and Y directions is detected by the scale 302 as a pulse signal, and sent to the computer 301 as a feedback signal F(x.

y).

The computer 301 controls the XY stage 100 and also controls the laser modulator 202 on and off. This will be explained in detail later, but in order to reduce errors caused by gear backlash and other play in the XY stage feeding mechanism as much as possible, the laser beam is turned on and off in order to write data only during unidirectional feeding. It is something that makes you

This computer 301 is operated by a clock from a reference clock oscillator 401, and this clock itself or this clock is once given to an oscillator 402 and its output is given to a vibrating device 204, and a mirror arranged in the optical path of the laser beam is used. Vibrate 205. This allows the bit to have an elongated shape.

FIG. 2 shows an example of data to be written to an optical card, and in this example, it is composed of a bar BR and a bit PT. Both the bar BR and the bit PT have a width of about several μm, the length of the bit PT is about 15 to 20 μm, and the interval between the bits PT is also about 15 to 20 μm. Therefore, the combined dimension of the illustrated bar BR and bit PT in the X direction is several hundred micrometers, and when observed with the naked eye, including the not-illustrated vertical portion of the figure, it appears as a single thin stripe. Each stripe handles several tens of bytes of information, and the entire card handles, for example, about 1 Mbyte of information using at least ten stripes.

To write these data on the card original, the bar BR moves the original in the Y direction and applies a stationary laser beam to write the data. The bit PT vibrates the mirror 205 to vibrate the laser beam within a predetermined angle range in the Y direction, thereby exposing a range of length δ in the figure. Then turn off the laser beam and scan the original card
direction and write the next bit. When the writing for one bit string is completed in this way, the card original is moved in the Y direction by the number of -bits, and the next bit string is written.

FIG. 3 shows how the laser beam scans in this writing operation. In the figure, a solid line indicates a state where the laser beam is on, and a broken line indicates a state where the laser beam is off. However, the reason why the solid line in the X direction continues between pits is for convenience of illustration, and originally only the pit positions should be solid lines.

In this case, the laser beam is operated at the origin P. start from.

The bar is aged from P to Py2, and the bit is aged from Pxo (Pxo') to PX3 (Px2').

In order to scan the laser beam in this way, the actual operation of the device is to move the card original.

This card original moving mechanism has various elements including gears, and has play in its operation. Therefore, in order to prevent the writing positions of the bars and bits from shifting due to the influence of this play, the loading is performed only when the card original is being fed in one direction, and when the card original is being fed in the opposite direction, it is fed until it passes the origin. Then move to unidirectional feed.

In other words, if the laser beam is to be irradiated to the origin Po, first move the card original in the Y direction to P, 1
After feeding up to that point, reverse the feeding direction and return to Po. Then, turn on the laser beam and send the original card to PV2. This completes the writing of the bar.

Next, to write a bit, the laser beam is turned off and the card original is sent in the Y direction to P, 3, and then the feeding direction is reversed and it is sent to P, 4. This P, 4 corresponds to the position of the first bit string in the Y direction. Therefore, the card original is sent in the X direction to Pxl, and then the feeding direction is reversed and sent to Pxo, and the laser beam is turned on. This writes the first bit.

To write the next bit, the laser beam is turned off, the card original is sent by one bit pitch in the X direction, and the rape beam is turned on. After that, write the table pits sequentially.

Each of the above positions is set as a program in the computer 301.

FIG. 4 shows a card original transport mechanism and a laser beam control mechanism for performing this writing.

The card original transport mechanism is an XY stage, and includes a mounting table for the card original PC, and driving means and guide means for transporting the mounting table in the X direction and the Y direction, respectively. That is, in order to send the card original PC in the X direction, a motor 111,
There is a reducer 112 and a feed screw 113, a motor 121, a reducer 122 and a feed screw 123 for feeding in the Y direction, guide rails 114 and 114 in the X direction for guiding, and guide rails 114 and 114 in the Y direction. Guide rail 124
．． There are 124.

On the other hand, the laser beam passes from the laser 201 through the modulator 202, passes through the ND filter, reaches the mirror 205, is reflected, and reaches the card original PC.

During this process, the modulator 202 performs on/off control, and the ND
The filter 203 weakens the mirror 205 and the vibration device 2
04 causes the beam to vibrate.

With such a configuration, the modulator 2 is moved while the card original is moved in the X and Y directions by the motors 111 and 121.
02 turns on the laser beam.

When turned off, data writing is performed. At this time, since the laser beam hits the card original PC from the bottom surface, dust does not get on the card original during writing, and therefore data recording errors caused by dust are less likely to occur. Also, since the laser beam is swung, long and narrow bits can be written easily.

FIGS. 5(a), (b), and (C) are flowcharts showing the operation of the apparatus shown in FIG. 1, with FIG. 5(a) showing the main flow, and FIGS. The write operation of the entire device will be explained based on this.

First, parameters are input using the computer keyboard (Sl). The parameters relate to the layout, such as how many stripes are used to record data, and how bars and bits are arranged in each stripe, as explained in connection with FIG. Next, read write data of about 10 bytes for one stripe (s2)
, which is determined by the capacity of the computer's built-in memory.

Once the data to be written is decided, first write the bar (S3
). This writing is performed by subroutine 1. That is, the XY stage is moved (s31), and when a predetermined point is reached, the laser is turned on (832) to start writing the bar. After writing the bar for a predetermined length (833), turn off the laser (s34) and return to the writing start position (s3
5).

After writing the bar, move on to writing the bit (S4
). This writing is performed by subroutine 2. That is, the XY stage is moved in the X direction (s41), and when it reaches a predetermined position, the laser is turned on and off (s42). This causes the bit to be written. When bits have been written for a certain number of minutes (s43), if the specified number of columns have not been written, move to the beginning of the next column and continue writing (s45), and after only the specified columns have been written (s44). Return to main flow.

Then, when the predetermined amount of data has been written (s5),
It is confirmed whether all columns have been written, and the operation ends when all columns have been written (85.87).

〔Effect of the invention〕

As mentioned above, in order to write data on the optical card original, the card original is sent in the X and Y directions by the XY stage, and writing is performed only when feeding in one direction, so each element of the feeding mechanism It is possible to prevent the positional accuracy of the original writing data from decreasing due to the influence of the play. Moreover, since the light beam is irradiated from below the card original, writing errors due to dust can be prevented. Furthermore, since the beam is vibrated, it is easy to write bits.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the conceptual configuration of an embodiment of the present invention;
FIG. 2 is a diagram showing a line of data to be written by the device of the present invention, FIG. 3 is an explanatory diagram of a card feeding operation in the device of the present invention for writing the data shown in FIG. 2, and FIG. 4 is a diagram of the device of the present invention. FIGS. 5(a), 5(b), and 5(c) are flowcharts showing the operation of the apparatus of the present invention. 100...XY stage, 111.121...motor, 112,122...reducer, 113.123...
- Feed screw, 201... Laser, 202... Modulator, 203... ND filter, 204... Vibration device,
205...Mirror, 302...Scale. BR...bar, PT...bit. Applicant's agent Kiyoshi Inomata Figure 1 > 4q rank 11') - Decoy

Claims (1)

[Claims] X to hold the original card and move in the X and Y directions
When controlling the movement of the Y stage and this XY stage in the X and Y directions, when switching from one direction to the other in each of the X and Y directions, the direction is reversed at one end of the data writing part, and the direction is reversed from the other direction to one direction. When switching to , a device is used to control the card so that it passes through the other end of the data writing part, reverses direction, and returns to the other end, and a vibrating light beam is irradiated from below to the card original on the XY stage. A data writing device for a card original, which is provided with means.