JPS5817546A - Photomagnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable a single optical system to have a recording and a reproducing function over tracking, by allotting recording and reproduction, and focusing and tracking to two light beams differing in wavelength respectively. CONSTITUTION:A beam B32 of a recording signal Er from a laser diode 32 is supplied to a polarizer 40 and then to a recording and reproducing pickup 50 through a dichroic mirror 46 to form its image on the recording surface of a recording medium disk 56. A beam B20 from a laser diode 72 is reflected by a mirror 46 and passed through the pickup 50 to form its image on the recording surface of the disk 56. The pickup 50 has a focus servomechanism and a track servomechanism, and the mirror 46 allows the beam B32 with the 1st waveform to pass it through, but reflects the beam B20 with the 2nd wavelength.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvement 6 of a magneto-optical recording and reproducing device using a magneto-optical M-V.

The magneto-optical recording and reproducing method is attracting attention as a means of recording and reproducing high-level information such as video signals.This method is
For example, G4C? Using the direct magnetization of a rare earth-transition metal such as bF@, the following timing is achieved.

(1) It is possible to use a high-quality iron.

(-) It is possible not only to record and reproduce, but also to erase* and advance recording.

(-I- Tsuka effect (polar kart @ spider
t), which simplifies the configuration of the optical system.

While it has the features of Kaede, the conventional magneto-optical device d has the following problems.

4m) Since a two-black mirror optical system, that is, a recording optical system and a reproducing optical system, is used, the size of the apparatus increases.

(@ If you want to immediately play back the recorded information on that device,
Since the recording system and the playback system are independent, the cursor with the value of 62 cliff system must be moved to correspond to the recording track position 1; in this case, this cursor has a large specific capacity. Therefore, the degree of cursor movement is uneven, and therefore the access time becomes longer.

(g) Because the recording system does not conduct an overload current, even if the same recording medium (disc for recording Hiroto Tamotsu) has a high price, it will not be possible to remove the IJ of the -1 disk. If there is an M-shape, a positional shift will occur as the disc is biased. This causes duplication of distribution. The main reason why the recording system does not perform the tracking) / IP 2 ) / The main reason why the torque is not performed is that there is a light beam for the top key in the recording system. Since the output of the main voltage of the sickle layer decreases, only recording media with a low temperature can be used.Then, media with a low temperature now have a large dependence on one change in Kerr's 1 turn angle. , 11/NM that Arashi likes when playing! , t- becomes difficult to obtain.

This SaW Itk serial number is a fist, and while performing the top key, there are no functions such as recording and playback.
It is important to avoid using a magneto-optical recording/reproducing device that achieves V*c- with a high-speed optical system.

It uses at least two monochromatic lights. One of these monochromatic lights is used for the recording beam, and the other one is used for the reproduction beam. These recording and reproducing beams are 1
The recording medium 6:J is emitted through the recording and playback fY. At the time of recording, the recording V-must and the reproduction V-must 1 are set to 0 and the recording track pitch is equal to C on the recording medium. The playback beam side performs playback (after-monitoring) while tracing the track after recording has been completed by the recording beams 4 and 4, and performs tracking. It can be done on the side. Since the recording system only has to share the responsibility of focusing, it is possible to take full advantage of the output V of the light source of the recording beam, such as a radar diode. For this reason, GdF, which is currently being considered as a magneto-optical recording medium, has a large number of
ΦAmorphous material (temperature 100℃~200℃ (
Magneto-optical recording can be performed using rare earth materials (rare earth metals).

In the structure @C described above, the wavelength of the recording r-me and the reproduction V-
Since wavelengths and wavelengths vary widely, it is possible to separate the recording and reproducing wavelengths even if they are handled by a single optical system. In other words, since only a single optical system is required, it is easy to downsize the device. aW registration C-
Since no system is used, the recording beam does not become insufficient in output even when tracking W is performed. In other words, there is no track interference and magneto-optical recording and reproducing with excellent 57xe performance is possible. Since the S et al. can be regenerated and regenerated at the same time, the access time for distribution and regeneration is extremely short.

According to this invention-2, such a device provides a signal that deceives Kishu -1
Remember, what is this memory content? ! It is also possible to compare it with a live signal. In this way, it is possible to perform an error check on the recorded contents while ζ2 is being recorded.

藺I! Multiple monochromatic lights with different liquid lengths may be used as one erasing beam and the other as a reproduction beam. In this case, the reproduction V-Musut detects the part to be erased. and topkin l is performed.

Then, this reproduction V-musItsu)c-the subsequent erasure*V-
Focusing and erasing! l Electric power is carried out.

In addition, when simply performing reproduction, just turn off the recording beam or the erasing beam. You can also use the other one as w**e-. In this case, the four re-recording beams are
Re-recording and focusing are carried out prior to the reproducing beams V.
- After the spot, the re-recorded signal is checked (after-monitoring).

An embodiment of the present invention will now be described with reference to the following. The first example is a recording medium 1 without a guide for Ftsukinder, which shows the magnetization profile and V-mus 4t when tracking is performed and magneto-optical recording and reproducing is performed. If you consider one place in the form of a disk, the adjacent Tochitsuta Okamoto truck is dry! To avoid requesting harm, please do the following: In other words, (1) it is required to improve the accuracy of the disc, to improve the accuracy of track remaining in the L-position during moving, and to improve the rotation and eccentricity of the disc.By the way, current optical discs As in the case of track L tuna and (pinching (3 tones - S degree), track interference will occur. When replacing the disc and performing brass distribution, in the maple shape, the number x Q pwm @ degree O position 9 This is because the 0 position is avoided.Therefore, tracking control becomes necessary.

1st L-, recorded track! 1. Beams 4t 2- of the Totsutsuki yr layer on the Peng lightning magnetization d-turn h~h
1 to 1# is easily imaged.

C-Mus 4t 21 for Hiro and Kijo is imaged at a position spaced from V-Mus It 201 by a distance of 1.

This C-mus spot 1 has enough A-2 to distribute brass.
11; Therefore, we are currently recording 4) Rack! 1j
Top C: Magnetized butter y111 is formed. As the S medium, the saturation magnetization II (14C or TebF) is used. In this case, Δ
Turn #1 ~ #Examination and 11. is for film painting - direct C; magnetization is determined. Kott, the magnetization method of Δtar y of 6 is so・horse■
It becomes the magnetic domain and Dofangang. This information on the eel reef list can be reduced by using the I-larker effect.

The top king for recording track Tll is 1! The race will be held with I-san as the guide truck. This tracking g2 enables alignment without track interference. Here, top king control is performed using a three-beam decision.

This 3rm wave is the well-known t! wave in the minute hand of an optical disk. 1g
II, so I will omit the explanation.

+#-4v-Musut 22shi; Abutamoera recorded by V-A
．． Te is done. Further, the error signal for the top king is obtained from V-Munupotsu) JO, and 2# Lu. V-Mussut 22 is in the recording area [After tracing the money, it is no longer possible to record on that f'LhL%I%,
Therefore, the playback output line from V-Musut 20 birds #
1 perish. If this output El disappears, b creates a recording end signal V,
The optical IIAv of the recording NA--m is activated by this Kiho end signal.
It is also possible to make a sudden low-off.

If the magnetic and wave layers and V-mus Itsu) are high, and the disk's level is not very high (the recording level is not very high, access the index on the disk and delete it. Also consider 7 methods to clean up the electric magnetization error y (sector) &t
L. However, the special electric wire (only ivy?) in the Hatakeru truck where Takada Toki #ls was detected and the location of Tanabata in 1970 was detected, and it was necessary to remove it. Hatakeru.S* while top king like this
The method of doing this not only allows erasure of high-intelligence information, but also eases the requirements for disk sticking accuracy. In other words, even if the rotational accuracy is somewhat low, it is possible to accurately erase only the Φ power outage portion of the information recorded with high accuracy.

Snow collection 1Ic-, recorded track te 14C; decrease;
V-Mus 4t201~jlatIXm for Tokutsukinda
Image St'L. Between the beams 4th lo and 2#, the erasing beam switch 24 interferes with imaging. V-Muspot) J#, Vr-Muspot 2-Yukika b4 voice turtle Yang degree, if you keep it apart, Shingo cr-Mus it sol and 2#
War of Warehouses 1; 11-muspot j4v can be inserted. Based on the top king signal obtained from the C-must spot 1#l and JlaiP, the top king drive mechanism for recording/reproducing/pickup is controlled IIi. And V-Musl
TS) With 1# wealth, t14*l, the preceding sector information to try -1:! -The evening is gone. Beam suit) J
#, W Therefore, the magnetization Δ turn with electrician s1% is erased by beams 4t 14 and becomes erased d tar y 141 (erased ** Δ turf 14 @ Fl journal me type m c s
It is something that does wh, and there is no physical pattern.

When the recording layer V-m Φ light source is composed of a Radede diode or the like which modulates the recording layer @1-, if the Raded-Mei diode is of the t'mw class, this light source V can be used as the light source of the V-m for erasing. Gadekai φ and 111th spot: 11th position and 3rd C-
Five ΦC-Musut v at the threshold of Musspot 14Φ shell
If moved, playback, recording, and #I* can be performed with a single C vine. This C-mus It Φ movement is the deflection amount vs! for that C-mus! This can be done by learning. That is, when erasing 1, place cr-mus 4 at the position of 31st IΦ flag 14, C thin, and when raising the brass, -2, and V-mus 4)w from C2 to 1st. The position C of the code 21 meets at 2, and in the case of ant and erasure g:, the outside iId Ias magnetic elevation is mms.

FIG. 1 shows the magnet shape m and the beams 4 when only reproducing is performed while track//V is being performed. imaged. By the V-Musut 20 meeting, Tockte I-1 distribution patterns 1#, ~1c8 are reproduced.

In this case, since the recording or erasing V-arm is not required, the V-light #1 is turned off sfL.

No. 411 accepts the case where re-recording is performed in a sector that has been reduced in mm. In the case of re-recording, recording and playback are performed on the same distribution track Tl # (2).
-8~xe, t: Therefore, while performing Totsutsukonda,
Re-recording is performed by re-recording trowel beams 4t sec. A/J#1 shows the re-recorded S delta magnetization Δ turn. Jll! In the case of recording, beam spot 2# is inserted between spot 1#■ and 1#.

By doing this, the re-recorded contents vv-mus 4
With these 10 proverbs, you can immediately learn 6 after words. Beam 4th 2# is obtained by 7 by moving the 1st H1ler-must 24. This movement can also be performed by performing a biased beam, that is, the saturated magnetized recording medium is erased by one reverse magnetization.

Next, this erased part [WJI with more than one temperature in the Ledeby group! UIkL, even with an external bias magnetic field, Q becomes reverse magnetization. Then, the magnetization direction of the curdled portion is reversed, and re-recording is performed.

Section S shows a magneto-optical recording and reproducing apparatus according to an embodiment of the present invention, which performs the recording, erasing, reproducing and re-recording described in sections 1llall to 4E''e.

In response to the recording signal 1r arc2, the recording laser drive circuit starts the crane rule-□dedio yxzwxit II! related. The presence/absence of opening/closing due to the drive Il connection J- and the presence/absence of the radar threat are determined by the @lmor signal] 11-1; Therefore, it is decided 1! I can't stand it. The radar diode 1111 has a first wavelength.
Light beam 5mxxw is generated. This C-mulJj becomes parallel light through the collimator lens J4, and the polarized light V-musputtsu! It is input to I-. The V-muwtzz that has passed through the V-musdelitter 1-v is converted into circularly polarized light g:converted S via the quarter-wave plate 1#. This circularly polarized light beam BJj is emitted from the optical deflector 40. The amount of deflection by the optical deflector 1114#C- is determined by the thickness deviation control signal 14jg given to the optical deflector section mis path 426.The circularly polarized light C-1Jffi reflected by the optical deflector s4# is:
Guicroic Mitsu-4gG-person # through y144
IIf'L. Makeshiitsukumitsu-4# wears the Ledebeam mzsvt kuiki in the first training, but the third training will be explained later.
Wavelength radar diodes are reflected. That is, the first wavelength and Ig! As a liquid member, wavelengths that can be separated by Guitaroic Mitsu-4# are widely used.

Iita Quick Mirror 4j1'V-mu 1173
is rellllk11#ivy1' through len 148
1flec-given@L'ffri7'F7'J#
The ill light C-mu is imaged on the recording image of the msxw recording medium disk 1g. This V-mu Bxxe image formation, 11
111 beam speed 21. V-Mus 4t 24 or 411g) R-Mus It 1-6 of No. 1: Corresponds. ttsukup J #decreased focus chi #JIII
Equipped with I and Tract 1#. In addition, a Δias magnetic n generating coil 51 is attached to the big ara fiot.

This coil 11 is a bias coil drive WA pedal i4c!
iJ brass electric $f'L. @@@84 is the first morat
In response to the output voltage 1462, the coil J# outputs a drive current 1111 having the magnitude 11 and direction of the disconnection.

The first light beam 11j reflected by the disk J# is Ctsukatsuypse, Lent4#, Make1ikmitsu-4
-, returns to the 174-wave plate J1 via lens 44 and optical deflection 14-v. The polarization of this reflected light beam BJJ is rotated by r/1 by the 174 wave plate [1].

Then, the reflected light becomes linearly polarized light V-muB111fl, and is reflected by the beam beam II62. Bi-light detection g
It is incident at 6m. The lens J8 forms an image of a V-meter corresponding to the focus detection screen on the light-receiving surface of the photodetector I#. Photodetector II-- has, for example, four photodetectors ilv,
A pair of photodetectors are placed on the opposite sides of the diagonal.The outputs of these pairs of photodetectors are the positive #A and inverse product inputs of the differential amplification @aX, respectively. It will be done.

Output of amplification Sσ2]! 11 causes focus error,
This output, that is, the focus control signal MIX, is fed back to the focus team M section of the cocoon arrangement f5# for focus team operation.

The detection of the focus control signal using the above-mentioned four-division type optical detection@gov is a known technique. Regarding this, for example, fW1tN Journal of the Society No. 31 @ No. 1 (1978) [Optical V Deo Disc V Stem JP, 2Q has a strange article.

The reproducing layer radar drive &gI connection r# is the III motor value signal r e t: In response, the second radar diode 12W
Excitation T4, 14t-rrlFt generates a second light beam B1- which is the second wave. This V-mu L-th is
: Split, this eswt-m is converted into linearly polarized beams V-m 11J61~BJ#, (2) by the polarizer rat2.These linearly polarized beams are
It passes through Fumitsu-#2 and enters Meikroitsukumitsu-4#. I was able to judge LL shooting with Guikuroic Mitsu-4- 3
Book beam B2#, ~110. is imaged on the recording surface of the disk Xg via the yth 48th, 48th, and 4th flOk. These three beams BI#l”-Bles
s) The imaging corresponds to the beams 41111142 shown in the first column 161 to J#, t1.

L-th beam reflected by disk 5#, ~111Jf#
s is 8-Fumitsu-#IC via tyyyyfs e, vypea s and Meikroitsukumitsu-4Cv
- Returning (0 reflection V-m L-th, ~111.) is reflected by the 8-f mirror 12, and is combined and divided into two by the 8-f mirror 84 sj'L.

8-Ramitsu 54w 4-sided central beam B2, #yoha,
Light detection @Sac is incident through the analyzer 11v. on the other hand,
The central V-mu 12# proverb reflected by 8-Fumitsu-14 is,
Photodetection gHxC- is incident through analyzer p#. ^-
Among the beams reflected by Fumi2#4, the r-mu1ffi#1 and ilJ#a of the truck's eyebrows were detected by photodetection@
It is incident on 14.9g.

Light detection @88. The output of II is given to differential amplifier 9#, royal power, and reverse radiation input terminal -2. Increase@@Za is photodetector #8
．． According to the difference 1;L between the outputs of 1 and 1, reproduced signals l and v are output.

Light detection @14. The output of the comb is applied 61 to the regular ellipsoid, * phase input terminal of the differential amplifier 100. A track control signal IJ##V is outputted to the amplifier 51-- according to the output and arrival of the photodetector @j4#ri6. This signal m1en is applied to a part of the tracker of the male tracker flu for the top cutie operation.

The above-mentioned record number 1r is -1Δtsufuame de x e x
c is memorized. The memory contents of this memo 101 are printed out as recorded information 1101 ・j#ID1i! Recorded information (1 track lIl/recorded information) before i transfer corresponds to C. The recorded information If 01 and the monitor information @111J4 are deposited at a temperature of 10σC2. This ratio I2 is carried out, for example, in series. As a result of this successive ratio arrival, a check signal II#- is output. This DECK signal 11#c causes one logic level change when there is a threshold &: dispersion between the information yaxax and 1104.If this DECK signal lJ#1vjl is present, the information recording state of one track ago I'm sure it can be done.

The input light beam BJJ is the first! Two 401, Daiyuki Mitsu 40. and 3rd Mitsu-4-#
Reflected by II3. Among these two, the first two 4#□ and the second two 4# are rotationally driven by the optical deflector driving part 1841e2. ! The rotation method #iii and the amount of rotation of the two 4 #1 and 4o houses are determined by the charter control signal 147. Denku 40. Hiro Beam 873
The friend's feeling is two Qinru. From this 3t, V-mu BJJ's switch, the circumferential tangential direction of disk 1- (track 7 same)-
Two are moved. Also, the mirror 4-proverb is V-5 Ba1k upper and lower cII. As a result, the switch of V-mu 11J, t is moved in the radial direction C of the disk 1g. mirror 4
111 and 4# The suit of beam IIJJ can be moved to any arbitrary position on disk j# from the proverbial reversal of stacking and parent meeting 42. That is, No. 2111:
:Suit 1 shown in Figure 1
The switch 11 can be moved to the position 2 or the position 1# of the switch 4 shown in #1c.

Note that the optical deflection 114# is a so-called electro-optical element vl1.
1 may be used.

Recording using the device in Part 3 is done as follows. jlN two vs. &! It is assumed that the ants have been completed and information corresponding to the distribution Δterm, c has been stored in the pubfanomotsu l#I. The first mode signal 11-5, the second mode signal 114, and the first mode signal 1r- have a recording amount -t'#j[, and the deflection control signal 141 has a recording amount V sliding current is applied by shifting the timing by l) tick rich. In this case, the third radomeiod rI and the second radomeiode 11 are
Both are clIkIm, and Δianu ##t'jl of the Goyle J2 diminished peak layer is also decreasing.

First, tracking control is performed using the C-mus spot 20g and J#at-, and the signal layer indicating the recording Δ term y device is re*s3.

The placement status of oA turn W is checked in Hikenki 1#-62. II#-Todorokisu Itsu) 101~2#
If it is confirmed that the track T1262 is correctly traced by the track T1262, recording by the beams 4t11 is performed on the track T1262 = 1 of the disk JI.
After recording of the rotation is completed, track 〒12 is traced from beam spot 1#, ~j #Ig:, and recording is performed using the next track 6; spot 12c. #l★ is as follows. S2 will be carried out. in this case.

! -P414tlJ#, 11#4 axis and IIF#et are turned off. Also, the control signal is #4
*V-Musao Totsutsu now y/f-mu's review-; Warikomasu Vast,, according to this #I regulation, the 21st
1&-1 as shown, V-mus spot 14 is switch 1
#1 and jO, Φ between C two princessllf. 11 ru-f
/Iode J2 is running from Leh f@V at Kojiokima,
Coil j1 generates an erase MA erase magnetic field. Third
Rede Meiod rI also carries out 11v from Rede.

First, tracking control is performed by beam nuts j-1 and 2#, and V-5 suit II.

playback is performed. And V-Munu 4) 2
e, t; Therefore, while the contents to be erased are monitored,
V-Mus Itsu) 141; erasure is performed.

During playback, mode signals IJ#, 154 and myam
Playback mode is set. The control signal line specifies, for example, beak*so-P≧-ji shape ll. When the playback mode is set to Sliden, the 1st loop I ode sx becomes jIII.
jA is fine, only the 3rd race fl Ior rrj is doing the race f member rope. In addition, when the coil 11 is not used and is regenerated, the V
- Munu Itsu) 11. Track 21 by jl and 2#s
g's Truckkin l and V-Munupotsu)jlfi4: Deru Δ Turn II! The playback is performed.

The code is specified. Further, the control signal is specified to be inserted between the redistribution V-m and the tracking V-m. Due to this designation, as shown in Figure 114, “
2. Beam switch 1# is spot 1# house and 10s
Placed in between. First, Beams 4t 20. and 1 - Tracking is done by Hatake, 4 beams)
Jl,l (:Thus, the location to be rewritten is searched for. When the rerecording location is found, a rerecording layer bias magnetic field is generated from the coil it, and rewriting is performed by the beams 4)jl.

V-Mus Itsu) 2#'s embroidery is a horsefly-Muspots)
76, i2, so immediately s3.

As mentioned above, there are three radar diodes with different wavelengths.
)Pv is used and its Rade oscillation output and deflection direction are controlled, recording, reproduction, and erasure can be performed with an integrated optical system. For this reason, the access dime of the device is expensive.
It is also possible to confirm the signal after the signal has been received.

Note that this *jl*c-description'S is not intended to determine what 6@@ should be. Various substitutions are possible within the spirit of the invention and the scope of the claims. For example, the invention of the AAVN output method [shown] in No. 1 Kuzujo, for example,
(Faraday・11・@t) It can be 4 times the same as the continuous transmission method using rllMI.

- 11 easy drawings! Figure 1 shows an example of scratches; trouble due to the equipment involved! If you do 4kv while doing 4kv, please use vimi*; Maro Ell! Figure 4 is a diagram illustrating the case of reproducing hla recorded information without performing tracking using the above device; Figure 4 is the device 1 described above; The following is a schematic configuration of the magneto-optical brass reproducing device that performs the operations explained in sections 1 to 4. Tsuku diagram; 6th
111mth s#lJt: Indication snh light @ Okaki 4at) is a perspective view showing an example of the body.

T door, T14. 〒1-...recorded track, m, ~niyume, xl, e14maro, 1σ, ~IIm...aftertone magnetization Δ turn (recording Δ turn), Jl1~10s... beam switch for totsu kinda (jll-reproducing layer beams 4), XZ...V-5 suit for recording, Te11.
・Record track, 24-・Eyebrow V-Mus 4t, 1
41"-・Erase*tlr-'Ku, N, T18...recording track, 111°°°return Δ turn, 2-...φ'
/s Recording V-MusIT, j #---Recording -ψ
Drive iii connection, Hr-kiss signal, 12... 1st light source (first light source), l J e-... l111 mode signal, B J 1-゛° first light beam 14. T4・
・・Kotometa Lens, xg*optical V-Musplitta, J
l...174 wavelength plate, 4#...light deflector, 41...
- Optical Yudo a drive-path, 141... Unbalanced thickness control signal, 44
．． 4g, a-... Lens, 4g-/Ita 1 Itsukumitsu 1i-... Recording playback f Tsukuatsu! , 52... Bias magnetic field generation coil, 14... Bias coil drive l
Abbreviation, 154...Third mode signal, xis...Drive current, l-...Recording medium disk, °5t...V run r
s1ayvy's, go,'ms, ri1. fJ4.1g・
- Optical inspection #M device, #1. R#, J##...11! ! Power amplifier, L eye...Focus control signal, 110...Third
So-do signal, 7l-UN1 child, y a-... polarizer, g
j, J 4-...8-7 mirror, 8#, #-...
・Analyzer, m, --... Reproduction signal, lJ##... Track control signal, 1-1...Δ rough 1 measurement, 1101.
...Record information, 1 #4-JIJk enhancer amplifier 118
4...4 unit information, x e g-... comparator, mxe
i...Check signal, 40,...First mirror, 40
Placement...St2, 4#1...Third mirror.

Figure 1 Figure 3 fart 16 Figure 2 14 Figure 04 fart 18

Claims (1)

[Scope of Claims] (1) A recording medium 1; recording and reproducing information on the recording medium 1 using magneto-optical effects. a first light source providing a first light beam having a first wavelength; a second light source having a s2 wavelength having a first length; connected to said first and second beam beams of said recording medium; optical means for guiding; said optical means (a) connected to said optical means; a focus control means for extracting a light component of one wavelength and controlling the focus calendar of the 111th century Qin 1 and the C-musut of the second light beam based on the first wavelength light component; contacting the means for extracting the optical component of the second wave member from the optical path of the second beam r; Magneto-optical recording 4 mm vertically arranged, characterized by being equipped with a tracking control means for controlling the tracking Y/V of the beam switch of the beam (2) The recording medium has a plurality of two adjacent recording tracks. , the optical means includes a deflection means for deflecting at least one of the first or second light beam by one minute to change the track pitch of the adjacent recording track, and the first light beam marked with # is directed to a predetermined recording track i. During the second recording, the second light beam is set at a predetermined V! The optical magneto-optical arrangement and reproduction of recording according to claim 1 is characterized in that reproduction is performed from a recording track that has been completely irradiated by an illumination beam 42 on a brass track. kgI
I place it. (3) The optical means L-Aya-II and the first light V
- storage means for storing distribution information Vle corresponding to the second light beam; and means for providing an error check signal t- in comparison with reproduction information corresponding to the second light beam and the stored contents of the storage means. Claim 1 characterized by
Magneto-optical recording and reproducing device, which is listed in Section 112. (4) includes a deflection hand iRv for deflecting at least one of the first or second light beam;
11 while the light beam erases a predetermined recording track.
Magneto-optical recording and reproducing according to claim 1, characterized in that the second light V of the rth era epoch detects the erase position of the predetermined recording track before the first light V-m. Storage. 4. The 111 optical means includes means Y for deflecting at least 17t of the first or second light r-5, and the 1111 light beam follows a predetermined trajectory.
- during the re-recording, the second light beam is a recording track of 1IIIefr, and the reproduction is performed from the part that has been re-recorded by the light beam 1; Memory/light reef atmospheric warming re*device. (6) The magneto-optical recording and reproducing apparatus according to any one of claims 11 to 5, wherein the third light source and the second light source include a radar diode. (7) Consideration of the letter of rehabilitation; see above! 6. The magneto-optical recording and reproducing apparatus according to claim 6, C2, characterized in that only the radar diode of the 112 light source is driven exclusively. (8) Magneto-optical recording and reproducing kg of nrtii@*-Nikisen, characterized in that the radar diode of the first light source of the 11th era is continuously driven in the erasure state.