JPS63282931A - Optical card recording method - 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 an optical card recording method for recording information on a card-shaped recording medium using a laser beam. Expectations for optical cards are increasing. The optical card can record up to 2M bytes in an ISO-compliant card size (85.5X 54.OXo, 8-). Magnetic card (72 bytes) 3
It's ten thousand times more.

Currently, optical cards are equipped with write-once (W) cards that allow additional recording.
r i t e 0nce) type and read-only type 2
There is a ROM type.

Regarding the standardization of optical cards, there is still no movement in Japan. In the United States, in 1984, ANS I
canNational 5 standards In
It has been decided that the standardization work will be carried out by the X3B10 Committee of 5 titute).

An example of a recording formant for an optical card is shown. In the case of write-once type optical cards, there are 16Eml stripe type and 35 word stripe type. FIG. 3 shows an example of the 3515 stripe type. For example, in the case of 35 word stripe type, 4Q96
It is reported that the recording capacity is 6.35 Mbits per track, 1100 tracks per 35 pieces. Depending on the format, 1550 trunks/35 parrots are said to be possible. For double-density codes such as MFM recording, the amount is more than 2M bytes/sheet.

Writing is performed one bit (one pit) per column using a laser beam. This is the same as recording on an optical disc. This optical head generally moves in the X-axis direction while detecting and tracking a guide line. On the other hand, the optical card moves in the Y-axis direction. Recording is performed in the +YY axis direction, and when one line (track) to 3 is completed, it is configured to quickly return to the -Y direction and record the next track in the +Y direction.

Problems to be Solved by the Invention However, in the conventional configuration as described above, a rotating body such as an optical disk performs one-dimensional control (the actual optical head is three-dimensional control) in which recording is performed in a single straight line. On the other hand, recording is two-dimensional, and the drive system and control system become complicated. Therefore, it had the problem of being susceptible to vibration.

In view of the above-mentioned problems, the present invention provides an optical card recording method in which the original card is fixed and information is recorded or read only by electronic scanning of a light beam.

Means for Solving the Problems In order to achieve this object, the optical card recording method of the present invention includes a pair of thin zigzag-shaped guide grooves with a constant width and a constant depth formed on the optical card, and a track. It records signals.

Operation: With this method, information can be easily recorded or written, or reproduced or read, by fixing the optical card and simply scanning a light beam to continuously trace the recording trunk in a zigzag pattern.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a recording track of an optical card recording method according to an embodiment of the present invention. In FIG. 1, 1 is an optical card board, 2 is a signal recording medium, 3 is a recording track, and in FIG. 1d, the recording trunk 3 has a completely continuous zigzag shape.
b has a discontinuous zigzag shape, and the discontinuous zigzag recording track can eliminate interference of beam spots between adjacent tracks.

The operation of the optical card configured as described above will be explained below.

Figure 2 shows an enlarged view of the recording track shown in Figure 1, as well as a laser (for example, a semiconductor laser) for writing and reproducing signals on the track, and a device for condensing it. 1 shows a main part configuration of a recording/reproducing device having at least a lens.

First, the light emitted from the laser 4 is condensed by the lens 5 and focused on the track 3 on the recording medium 2 to form an information pit 6. At this time, the laser beam scans and tracks along a pair of narrow zigzag-shaped guide grooves 7 having a constant width and a constant depth.

On the other hand, during reproduction, the laser beam reads the information pits 6 while tracking the recording track 3 along the guide groove by a separately provided tracking means (not shown), as in the case of recording. In this case, when the optical card board 1 is scanned with a laser beam by some means in a fixed state, it is preferable that the scan locus of the beam is continuous from the viewpoint of ease of scanning. The track for this purpose is a zigzag shape, which is a broken line, but is continuous, and satisfies this requirement. That is, by simply controlling the laser beam back and forth, information can be stored and read out, that is, recorded and reproduced.

6. Effects of the Invention As described above, according to the present invention, information is written and read using electronic laser beams by recording signals on zigzag recording tracks formed on the recording medium of an optical card. It is possible to perform the process easily and stably by just scanning.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing recording tracks of an optical card used in an optical card recording method according to an embodiment of the present invention;
The figure is an enlarged view of a recording track, and FIG. 3 is a plan view showing a conventional recording track. 1... Optical card board, 2... Recording medium, 3... Recording track, 4... Laser,
5... Condensing lens, 6... Information pit, A... Guide groove.

Claims (1)

[Claims] An optical card recording method characterized by recording a signal on a pair of thin zigzag-shaped guide grooves of constant width and constant depth formed on an optical card and a track.