Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993最新文献

{"title":"Thin Optical Head With Flip-chip Bonded Module For CD-ROM Drives","authors":"T. Nagano, E. Ueda, S. Onayama, R. Katayama, H. Hamada, Y. Ono","doi":"10.1109/OMODS.1993.696701","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696701","url":null,"abstract":"","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Motionless-head Parallel Readout Optical Disk Prototype System","authors":"P. Marchand, A. Krishnamoorthy, P. Harvey, S. Esener","doi":"10.1109/OMODS.1993.696729","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696729","url":null,"abstract":"The design, analysis and experimental demonstration of the motionless-head parallel readout optical disk system are presented. The system is designed to read 1-D data blocks distributed radially on the disk’s active surface and generate 2-D output binary images [*I. It has the unique advantage that no mechanical motion of the head is required for fast access, focusing or Wdcking. This allows a data rate of up to 1 Gbytdsec for standard disk rotation speeds of 2400 rpm. The data blocks are stored on the disk as 1-D Fourier-transform Computer Generated Holograms (CGH). Each one of them is calculated to reconstruct one column of a 2-D output image. During the sequential recording process, all the CGH for a given 2-D image are laid-out side by side and radially shifted from one another until they span the entire radius of the disk active surface. During the parallel readout process, only the data blocks a single image are illuminated at once and data access is achieved solely through the disk rotation so that the entire memory can be read in one rotation. The Fourier direction of the holograms is along the radial direction of the disk. Thus, due to the shift invariance properties of Fourier transform holograms, the tracking servo requirement can be eliminated. Under-illuminated Fourier Transform holograms will still reconstruct, although with a loss in output signal-to-noise ratio. Therefore, the information redundancy property of Fourier Transform holograms virtually eliminates the focus servo requirement. An iterative CGH encoding method is developed to produce high signal-to-noise ratio reconstructions and to reduce significantly the radial alignment requirements of the recorded data bits. The iterative algorithm is derived fiom the DBS technique and in conjunction with a gray level representation by area modulation on the disk, it is proven to give the best results if compared to existing conventional encoding schemes. The optical readout system simply consists of three stationary cylindrical lenses. The fmt one illuminates an area on the disk that corresponds to the data blocks of a single output 2-D image. For better optical performance and signal uniformity, it can be replaced by a single diffractive beam forming element (Fresnel hologram). The other two","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125147142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution Of Optical Disk Era Into The 21st Century","authors":"S. Miyaoka","doi":"10.1109/OMODS.1993.696693","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696693","url":null,"abstract":"The commercialization of compact disk (CD) in 1982 was a landmark event in the evolution of optical disk. The compact disk has since enjoyed an overwhelming support from consumers who were not contented with LP records. More than 300 million disks and 50 million players were sold in 1992. Not only did the CD revolutionize world-wide audio market, the successful format standardization it brought on stimulated the software industry to switch from LP records to CD.","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128795997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical Recording System In Minidisc","authors":"T. Yoshida","doi":"10.1109/OMODS.1993.696709","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696709","url":null,"abstract":"The HiniDisc (MD) system 'includes a recordable magneto-optical. (MO) disc for user-recording and a conventional read-only disc for music-software WiniDisc is highly suited for outdoor poxtable applications. By mean8 of audio data Compra88iOn and 8hOCk m8i8tant X Y , Mter the introduction of the compact ~isc, consumers have becoxm accustomed to the bemerit of quick random access w i t h an optical disc system. ZesUlt, the CD has been universally accepted as the standard for high fidelity music playback i n the home. Oa88ette is still widely used in portable outdoor applioations because of its easy handling ,c011p1ctne88 and rooording capability. But sales of cassette tape have been deareasing since 1989 leading Sony t o believe that the compact cassette tape is approaching end of the life. Magneto-optical (MO) disc recording technology has been used for computer data storage system for several years. Based on this technology, we have developed a direct ower-writing system that is capable of the same high recording density as compaat &so. W e have ale0 sucoessfully.de~loped a digital audio canpression system nanrsd AT= (Adaptive ~~ansform Acoustic Coding) that nvkes 74 minutes of digital audio reoording possible on a small 64mn diac. In addition, a shock-reaiatant buffer memory has been incorporated to minimize the effects of shock in portable applications. A8 a On the other hand, the^ compact","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132779445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic Simulation Of Magnetic Field Modulation Methods For Pulsed Laser Irradiation In Magneto-optical Disks","authors":"Seiji Yonezawa, Masahiko Takahashi","doi":"10.1109/OMODS.1993.696753","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696753","url":null,"abstract":"Direct overwrite magnetic-field modulation recording with dc and pulsed laser irradiation in a magneto-optical disk was simulated thermodynamically. Because the laser light heats the magnetic film, which allows the magnetization to be reversed, the waveform of the laser light strongly affects the shape of the magnetic domain. The dynamic temperature changes in magnetic thin films are simulated for dc and pulsed laser irradiations. With pulsed irradiation the heat is constrained within a limited area, which results in jitter-free magnetic domains, high optical efficiency, and high tracks-per-inch and bits-per-inch recordings.","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131215477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CD-i, The Individualized Execution Of Programs/titles And Storage Requirements","authors":"F. Frank","doi":"10.1109/OMODS.1993.696710","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696710","url":null,"abstract":"","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114870281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison Of Polarization Wadout Techniques For Magneto-optic Systems","authors":"E. Gage","doi":"10.1109/OMODS.1993.696771","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696771","url":null,"abstract":"polarization state of the light beam reflected from the disk. Optimizing the detection of the reflected beam's polarization state is critical to maximize the signal-to-noise ratio in a magneto-optic disk drive.1 Examples of differential detection schemes that are capable of correcting for the ellipticity in the reflected beam and maximizing the common mode noise rejection are shown in Fig. 1. With the method of Jones calculus,a the detection system can be optimized for a given head media interface by specifying the retardance of the liquid crystal variable retarder (LCVR) in case (a) or the general waveplate in case (b) and the angles for the other optical components. The information recorded on a magneto-optic (MO) disk is read out by sensing the","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117205047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Repetitive Track Seek Algorithm For Optical Disk Drives","authors":"M. Akiyama, J. Ishikawa, T. Tsujisawa, H. Inada","doi":"10.1109/OMODS.1993.696745","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696745","url":null,"abstract":"In order to achieve stable and rapid track seeking, a repetitive track seeking algorithm, which realizes highly accurate velocity control through velocity error integration, has been developed. Simulations and experiments show that the algorithm is effective in optical head velocity control. The algorithm reduces velocity error, compared with the conventional approach, so that the transient response at the seek end is greatly improved. The total seek time is reduced by adopting a reference velocity trajectory with larger deceleration rate, using this algorithm.","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123661754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3.5\" MO For Personal Systems","authors":"K. Utsumi, K. Ogawa, M. Yoshioka","doi":"10.1109/OMODS.1993.696707","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696707","url":null,"abstract":"","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121897872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement Of Track Density By Land And Groove Recording On Phase Change Optical Disk","authors":"N. Miyagawa, Y. Goto, E. Ohno, K. Nishiuchi, N. Akahira","doi":"10.1109/OMODS.1993.696719","DOIUrl":"https://doi.org/10.1109/OMODS.1993.696719","url":null,"abstract":"","PeriodicalId":103906,"journal":{"name":"Conference Digest Joint International Symposium on Optical Memory and Optical Data Storage 1993","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128153903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}