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Magneto-optical storage technology and their applications


Oath the amount of feet down luxuriant luxuriant Sharp gluttonous gluttonous Mao's wife vellus sprouts wilt wilt hi smoked Cui Mao luxuriant amount of magnetic record of 52. It can playback recorded material 74min stereo high-fidelity digital music, its sound quality and are now fully comparable to the popular CD recording. In modern audio equipment on the market, CD, DAT, DCC and MiniDisk four products,[link widoczny dla zalogowanych], will show a complex competitive situation. MiniDisk device can also be used for computer data storage, and its development prospects are bright. Table 4ISo twenty standard magneto-optical power before and 7 compare the magnetic disc magnetic disc ISO Standard: 7 + P only ≯ in force, L, MO-1310PNDI MO magneto-optical disc diameter of a diameter of 130mm diameter 1314GND 130rflrfl memory capacity 650MB (both sides) 1 .2 GB (both sides) glass substrate materials PC user area half the radius of 30 ~ 60mm 30 ~ 60mm flat segments / each 17 segment 6 segment sector size spiral-shaped spiral Road 1024B40kB Road from 1.6 | Im6 | Im IV Magneto-optical storage technology trends first-generation magneto-optical disk drive performance in data access time less than make it in the development and application of computers and other areas was limited. To this end, Japan and the United States,[link widoczny dla zalogowanych], many companies have begun to second-generation magneto-optical drive for practical development work. Development of second-generation magneto-optical disk drive, to solve the technical problems there are four major I1) rewriting: This is the magnetic disc to erase data when the data bit in the old re-write the new data bit technology. Magnetic modulation and optical modulation current are mature. 2) pit edge recording technology: the first generation magneto-optical drive, full adoption of pit-bit recording, to improve the recording density, the second generation machine will use the pit edge recording technology, the line recording density will be increased 1.5 times. -3) Real-time verification technology: This is a real-time inspection records, technical data is correct. 4) Compatibility: CD-ROM drive from the design of the technical point of view, clever use of optics, electronics and control technology, can be done either stand-alone operation WORM CD-ROM, and. Can run as well as read-only compact disc magnetic disc 3 1992,[link widoczny dla zalogowanych], Table 6, the third generation 5.25in magneto-optical drive and disk drive performance comparison bit recording density (B / ram) Road density (road ~ ram) data transfer rate (MB word ~ / sec) CD-ROM speed (rpm / min) Access Time (10SCc) rewrite the reliability of equipment price (yen / trillion bytes) of each medium price (yen / megabytes) devices to set Efficiency (Yen / gigabytes / m) medium-power medium copy I swap disks (93) f magneto-optical (93) f j status of a future status - will f12003200I100034O0Ix80120I6301000l4.59l0.73 \I can not be there i hit the first drive long-term stability loss l 1000300I750, -, 500150} 501SI50 ~ 155} jJ1050 {1050If big! not A f is not a small hole with 5R0M course, the development of second-generation magneto-optical disk drive, in addition to the four major key technologies, should also address the separation of head design, high-speed read / write / wipe control, high precision,[link widoczny dla zalogowanych], high reliability and focusing and tracking servo, quick access and feedback noise reduction and many other technical problems. Moreover, with the direction of head technology to the development of integration is expected to 1995, performance is better than disk technology level 5.25in2GB, 3.5: n600MB third-generation magneto-optical drive (Table 6) in the computer field will be general application, and annual sales will reach 12 million units,[link widoczny dla zalogowanych], the output value will exceed 100 billion U.S. dollars.
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