International Symposium on Optical Memory and Optical Data Storage Topical Meeting

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Small integrated optical head device using a blue-violet laser diode for Blu-ray Disc system
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 386-388
K. Manoh, H. Yoshida, T. Kobayashi, M. Takase, K. Yamauchi, S. Fujiwara, T. Ohno, N. Nishi, M. Ozawa, M. Ikeda, T. Tojyo, T. Taniguchi
We report the first integrated optical bead device using a blue-violet LD (laser diode), which is a key device for realizing a small and thin-shaped Blu-ray Disc drive. While integrating seven optical parts into one device, by adopting a molded compound lens with high transmissivity to the blue-violet wavelength, the small size of 11 mm /spl times/ 6 mm /spl times/ 4.1 mm has been realized. At thi...... hiện toàn bộ
#Optical devices #Integrated optics #Diode lasers #Optical films #Lenses #Holographic optical components #Holography #Magnetic heads #Mirrors #Assembly
Table of contents - Post deadline session
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang i-446 - 2002
Presents the table of contents for Post deadline session papers.
System aspects of dual-layer phase-change recording with high-NA optics and blue laser
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 9-11
H. Richter, H. Hofmann, J. Knittel, O. Kawakubo, T. Kashiwagi, A. Mijiritskii, J. Hellmig
The ever-increasing demand for higher capacities driven by data intensive applications such as high-quality video has been met through steady increase of the areal bit density of the optical media. Very recently, the so-called Blu-ray Disc (BD) standard was announced, offering a capacity of up to 27 Gbytes per 12 cm disk. The BD format is designed as a groove-only format, which allows easier ROM, ...... hiện toàn bộ
#Optical recording #Disk recording #Video recording #Read only memory #Optical materials #Absorption #Magnetic heads #Shape control #Optical control #Lighting control
High-transfer-rate 4.7-GB DVD-RAM
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 416-418
M. Miyamoto, J. Ushiyama, K. Umezawa, A. Kashiwakura, R. Tamura
Showed the feasibility of 4.7-GB DVD-RAM media for 5/spl times/ recording. In order to maintain compatibility with current 2/spl times/ drives, we reduced jitter in both 2/spl times/ and 5/spl times/ recording. The most important design concept is to control the crystal growth velocity and crystal nucleation frequency: the former should be reduced and the latter increased. To control these values,...... hiện toàn bộ
#Crystallization #Jitter #Optical recording #Frequency #Amorphous materials #Substrates #Interference #High speed optical techniques #Optical films #Research and development
Inorganic write-once disc for high speed recording
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 431-433
H. Inoue, K. Mishima, M. Aoshima, H. Hirata, T. Kato, H. Utsunomiya
Write-once media has been used as storage media for medical data, official documents in order to prevent tampering. In addition, write-once media, such as CD-R or DVD-R are the most popular storage media for the computer in the world by reason of the interchangeability with the ROM disc. On the other hand, in order to obtain much larger capacity, DVR-blue system (/spl lambda/ = 405 nm, NA = 0.85) ...... hiện toàn bộ
#Disk recording #Jitter #CD recording #Read only memory #Inorganic materials #Optical materials #Computer hacking #Drives #Testing #Diode lasers
Improvement of the photo-polymer sheet for the multi-layer disk with the high NA objective lens and blue-violet laser
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 36-38
N. Shida, T. Higuchi, T. Iida
In ODS2000, we reported experimental results for the triple-layer disk using the photo-polymer (2P) sheet (N. Shida et al, ODS 2000 Tech. Dig., pp. 27-29, 2000). The subjects of the 2P sheet were the high transmittance, low variation of thickness and duplicate performance. Therefore, we developed a new 2P sheet which has sufficiently high transmittance of over 95% and sufficiently small thickness ...... hiện toàn bộ
#Lenses #Jitter #Apertures #Aluminum alloys #Research and development #Laboratories #Equalizers #Absorption #Reflectivity #Silver
Adaptive aberration compensation in high NA optics
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 254-256
T. Shimano, T. Ariyoshi, H. Sukeda, K. Maruyama, K. Murata
Two approaches have been proposed for achieving 25-50 Gbyte capacity on one side of a 120 mm disc: using a two-element high numerical-aperture (NA) objective and using a dual-layered disc. One of the problems with these approaches is that an error in the cover-layer thickness of only a few microns can lead to serious spherical aberration. (SA). This is a particularly serious problem in dual-layere...... hiện toàn bộ
#Adaptive optics #Synthetic aperture sonar #Holographic optical components #Holography #Lenses #Servomechanisms #Focusing #Laboratories #Glass #Disk recording
Prediction of the characteristics for high-speed recording of phase-change optical media
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 171-173
Y. Nishi, T. Shintani, I. Kando, M. Terao
High-speed and high-density recording using blue laser appears to be the main stream for the next generation of phase-change optical disks. Sb-rich phase-change recording materials present one option as a medium for high-speed recording. We have estimated the crystal growth rate (CGR) of two variants of the GeSbTe recording material, for 100 Mbps recording (type 1) and Sb-rich material for 300 Mbp...... hiện toàn bộ
#Optical recording #High speed optical techniques #Amorphous materials #Disk recording #Crystalline materials #Optical materials #Laboratories #Writing #Personal communication networks #Cooling
Precise track-following control using a MEMS tracking mirror in high-density optical disk drives
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 257-259
I. Watanabe, Y. Ikai, T. Kawabe, H. Kobayashi, S. Ueda, J. Ichihara
Developed a dual-stage tracking mechanism using a MEMS tracking mirror and used /spl mu/-analysis and synthesis to design a controller satisfying multiple desired specifications. The efficiency of the proposed method was demonstrated by an experiment having tracking errors of less than 10 nm. We expect the MEMS tracking mirror to contribute to the creation of high-density optical disk drives.
#Optical control #Micromechanical devices #Mirrors #Disk drives #Tracking #Actuators #Design methodology #Production #Motion control #Bars
Mô phỏng ngưng tụ 3-D trong phương tiện ghi thay đổi pha Dịch bởi AI
International Symposium on Optical Memory and Optical Data Storage Topical Meeting - - Trang 66-68
Zhaohui Fan, D.E. Laughlin
Kỹ thuật ghi quang thay đổi pha đã phát triển rất nhanh trong vài năm qua. Các kỹ thuật ghi phức tạp hơn đang được nghiên cứu để áp dụng vào ghi thay đổi pha, bao gồm ghi nhiều mức và ghi nhiều lớp (H.D. Shieh et al, 2001; L. Shi et al, 2000; T. Akiyama et al, 2001). Chúng yêu cầu kiểm soát chính xác công suất laser và thời gian xung để đạt được hiệu suất đĩa tối ưu (ghi và xóa). Do đó, cần có sự ...... hiện toàn bộ
#Kết tinh #Ghi quang #Ghi đĩa #Vật liệu tinh thể #Vật liệu thay đổi pha #Tế bào dielectrics #Mô hình isothermal #Điều khiển tối ưu #Điều khiển quang #Hệ laser công suất
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