JPS619840A - Optical storage method - Google Patents

Abstract

PURPOSE:To obtain the storage method where a plurality of information are recorded or reproduced simultaneously and a recording medium is not damaged, by converting plural radio signals to laser beams and storing them independently of one another by the optical storage method. CONSTITUTION:In a recording part 4, semiconductor lasers 5 are arranged in a sector, and laser beams from these semiconductor lasers 5 are shaped to parallel beams by a shaping lens 6 after bein condensed at a point A. Intervals of laser beams are narrowed to close gaps between tracks. Parallel beams are reflected on a totally reflecting mirror 7 and are turned at 90 deg. and are condensed linearly on a recording medium 9 by a cylindrical lens 8. This condensing direction crosses the advance direction of the recording medium 9, and pits are formed on individual tracks of the recording medium, and plural radio signals received by a radio receiving part 1 are recorded on individual tracks of the recording medium 9 independently of one another.

Description

[Detailed description of the invention] Technical field of invention The present invention relates to an optical storage method.

Technical Background and Problems of the Invention Methods for recording radio signals from television, radio, etc.
Generally, magnetic means such as video tapes and cassette tapes are used. However, when magnetic means are used, it is disadvantageous in that it is structurally disadvantageous for recording on multiple tracks, and it is difficult to simultaneously record on multiple channels or simultaneously record/reproduce.

Furthermore, in magnetic recording and reproduction, since the recording medium slides on the magnetic head, sliding friction occurs between the two, which not only damages the recording medium but also damages the magnetic head in the long run. It also has the disadvantage of causing wear.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a storage method that allows simultaneous recording and reproduction of a plurality of channels and that does not damage the recording medium.

Summary of the Invention The present invention simultaneously receives multiple radio wave signals in a radio wave receiving unit, separates the radio wave signals, converts them into a plurality of laser beams, and transmits the laser beams onto a tape-shaped recording medium in a direction intersecting with the traveling direction of the laser beams. By concentrating multiple laser beams in parallel and simultaneously recording and reproducing multiple radio wave signals converted into laser beams onto a recording medium, simultaneous recording and reproducing of multiple channels is possible, and the recording medium is Since the device only moves while being irradiated with a laser beam, it is configured to prevent damage to the recording medium and the like.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of the present invention. First, a radio wave receiving section 1 that receives radio wave signals of a plurality of channels is provided, and a band pass filter 2 is provided that tunes the plurality of signals received by the radio wave receiving section 1 and separates them channel by channel. A demodulation circuit 3 that demodulates a signal containing a carrier wave sent from the bandpass filter 2 is provided. Furthermore, there is provided a recording section 4 that converts the signal from the demodulation circuit 3 into a laser beam and records it, the principle of which is shown in FIGS. 2 and 3. That is, a drive circuit (not shown) that converts the signal from the demodulation circuit 3 into a drive signal is provided, and a plurality of semiconductor lasers 5 that emit laser beams in accordance with the drive signal are provided. Then, a shaping lens 6 converts the plurality of laser beams irradiated from the plurality of semiconductor lasers 5 into parallel light beams, and a total reflection mirror 7 which reflects and changes the traveling direction by 90 degrees, condenses the parallel light beams into a linear shape. A cylindrical lens 8 is provided, and a transmissive tape-shaped recording medium 9 is provided on the condensing line.

Further, a reproducing cylindrical lens 1o is provided to linearly condense the laser beam that passes through the recording medium 9 and spreads again, and a detector 1 is placed on this converging line.
1 is arranged.

In such a configuration, a plurality of radio wave signals received by the radio wave receiving unit 1 are tuned by the band pass filter 2 while containing carrier waves, separated into l channel units, demodulated by the demodulation circuit 3, and sent to the recording unit. Sent to 4. The recording unit 4 converts these signals into a drive signal for driving the semiconductor laser 5, and this drive signal causes the semiconductor laser 5 to emit a laser beam. FIG. 3 shows a plan view of the recording section 4. The semiconductor lasers 5 are arranged in a fan shape, and the laser beams from these semiconductor lasers 5 are directed at A in the figure.
After the light is focused at a point, it is made into parallel light by a shaping lens 6.

This allows the distance between each laser beam to be narrowed, and therefore the track spacing to be reduced. Then, the parallel light beam is reflected by a total reflection mirror 7 to change its direction by 90 degrees, and is focused linearly onto a recording medium 9 by a cylindrical lens 8 . This direction of light convergence intersects the traveling direction of the recording medium 9 (indicated by the arrow in FIG. A plurality of received radio wave signals are independently recorded on each track of the recording medium 9.

On the other hand, during reproduction, a low-power laser beam is irradiated from the semiconductor laser 5 through a separate path (not shown) and focused onto the recording medium 9 through the same path as during recording. Here, the low-power laser beam passes through the recording medium 9, passes through the reproducing cylindrical lens 8, and is focused on the detector 11. At this time, the bits of the recording medium 9 formed during recording are detected by the detector 11 using a low-power laser beam, and reproduction is thereby performed.

As described above, according to this embodiment, a plurality of radio wave signals received by the radio wave receiving section 1 can be simultaneously recorded on the recording medium 9, and the semiconductor laser 5, which is the recording/reproducing head for the recording medium 9, Since each track is independent, you can also play back another track while recording a channel.

Furthermore, since an optical storage method is used, the spacing between each track can be narrowed, making it possible to record and reproduce an extremely large amount of information at the same time. Since the recording medium 9 only moves while being irradiated with the laser beam, the recording medium 9 and the recording section 4 will not be damaged by sliding friction. Furthermore, since the recording medium 9 is tape-shaped, it is possible to store a large amount of data.

In addition, in implementation, the recording unit 4 uses a method such as a magneto-optical method that uses magneto-optical effects such as the Kerr effect or Faraday effect, or a phase transition method that detects changes in reflectance due to phase transition between crystal and amorphous. may be used, and the recording medium 9 may be of a reflective type.

Effects of the Invention As described above, the present invention converts a plurality of radio wave signals into laser beams and stores them independently using an optical storage method, so that a plurality of pieces of information can be simultaneously recorded and reproduced. Therefore, a large amount of information can be processed in a short time, and since an optical storage method is used, there is no need for anything to come into contact with the recording medium.
Damage to the recording medium and wear and tear on the machine can be eliminated.

The use of a tape-shaped recording medium has the advantage of being able to store large amounts of data.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram showing an embodiment of the present invention, FIG. 2 is a side view of a recording section, and FIG. 3 is a plan view thereof. 1...Radio wave receiving section, 9...Recording medium suspension application person
Tokyo Electric Co., Ltd. 3” Figure

Claims (1)

[Claims] Multiple radio wave signals are received simultaneously by the radio wave receiver, those radio wave signals are separated and converted into multiple laser beams, and the multiple laser beams are transmitted in parallel onto a tape-shaped recording medium in a direction that intersects with the traveling direction of the laser beams. 1. An optical storage method characterized in that a plurality of radio wave signals, which are condensed into laser beams and converted into laser beams, are simultaneously recorded and reproduced on the recording medium.