International Symposium on Optical Memory and Optical Data Storage Topical Meeting
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Holographic storage - elegant technology, elusive product
- Trang 138-140
This article gives a review of holographic data storage, and covers such topics
as: history and development; technological issues; recording media; recording
and recreation systems; future outlook and prospects.
#Holography #Photorefractive materials #Optical materials #Optical recording #Optical distortion #Optical modulation #Holographic optical components #Liquid crystal displays #Sensor arrays #Costs
High-speed blue-laser recording on the double-decker phase change disk with high-reliability
- Trang 234-236
In this paper, we report the feasibility of 100 Mbps data transfer-rate with
high reliability and wide-power margin that media can apply to double-deck high
density recording of 42 GB capacity corresponding to an optical recording disk
system (K. Schep et al, ISOM Tech. Dig., p. 210, 2000) using a blue laser diode
at 405 nm, and NA (numerical aperture) of 0.85.
#Disk recording #Jitter #Optical recording #Protection #Diode lasers #Lenses #Modulation coding #Wavelength measurement #Pulse width modulation #Research and development
Functional hard-coat for cartridge-free DVR-blue
- Trang 12-14
Optical discs with larger storage capacity and higher data recording rates are
required for the coming digital network society, for example, to realize
non-linear editing and long term data archiving on broadcasting tasks. We have
been developing a new phase change optical disc, which has much higher data
recording rate of up to 140 Mbps (T. Kato et al, Tech. Dig. ISOM2001, pp.
200-201, 2001), bas...
#Optical recording #Surface resistance #Nonlinear optics #Optical sensors #Disk recording #Lenses #Optical fiber networks #Digital recording #Surface emitting lasers #Fingerprint recognition
AFM analysis of wobble amplitude
- Trang 359-361
We directly measure track wobble amplitude in recordable optical disc media
using AFM images and automated analysis procedures. Wobble amplitude of 30 nm is
easily measured, but calibration is important in order to avoid errors.
#Size measurement #Image analysis #Optical microscopy #Spirals #Atomic force microscopy #Optical recording #Calibration #Manufacturing #Timing #Trajectory
The study of crystallization acceleration effect of the interface layer for phase-change optical disks
- Trang 90-92
From CD to DVD, higher data transfer rate was a difficult property for
phase-change optical disks to achieve. A complicated layer structure was
developed to achieve high crystallization rate of recording material for high
erasing rate. The study of Yamada et al (Jpn. J. Appl. Phys. vol. 37, pt. 1, p.
413, 1998) showed that adding an interface layer can accelerate the
crystallization rate of record...
#Crystallization #Acceleration #Optical recording #Crystalline materials #DVD #Disk recording #Silicon carbide #Testing #CD recording #Optical materials
Application of multi-level recording with growth-dominant material to CD and blue DVR generations
- Trang 66-68
We confirmed that the ML (reflectivity) recording with growth-dominant material
can be universally applied to any density of optical disc from CD to DVR blue.
The present study is focused on the evaluation from the view point of a
removable disc manufacturer, i.e., reliability such as overwrite cyclability and
archival and self life and volume production capability.
#CD recording #Aging #Amorphous materials #Optical materials #Size control #Crystallization #Writing #Disk recording #Optical recording #Space technology
Physical characteristics and format of a two-inch-diameter magneto-optical disk system with 3-GB capacity
- Trang 42-44
A small and high-density rewritable optical disk has been anticipated for mobile
devices. A two-inch-diameter magneto-optical disk system, which adopts a DWDD
(domain wall displacement detection) and sampled servo technique, was reported
in a previous work (T. Shiratori et al, J. Magn. Soc. Jpn., vol. 22, supp. no.
S2, pp. 47-50, 1998; M. Birukawa et al, Proc. MORIS2002). This paper describes
the ...
#Servomechanisms #Cities and towns #Automatic voltage control #Magnetooptic recording #Delta modulation #Magnetic cores #Optical devices #Optical crosstalk #Magnetooptic devices #Laser theory
Dual-layer Blu-ray Disc based on fast-growth phase-change materials
- Trang 407-409
Blu-ray Discs are recorded and read with a blue-violet 405 nm laser through a
high numerical aperture 0.85 objective lens. The main application of Blu-ray
Discs will be high definition television (HDTV) recording. Future demand for a
major capacity increase within the Blu-ray Disc family is anticipated by
development of multi-layer technology. However, the optical and thermal
characteristics of th...
#Optical recording #Optical materials #HDTV #Space technology #Apertures #Lenses #TV #Disk recording #High definition video #System performance
A novel microminiaturized aspherical lens with a high numerical aperture [optical storage]
- Trang 398-400
Developed the new production method of the small-sized lens with the excellent
characteristic of the mold lens process. The NA0.65 lens with the effective
diameter of 0.221 mm was successfully fabricated. It was confirmed that this
production method is suitable for a small diameter lens. Furthermore this method
can be applied to higher numerical aperture lenses, and makes it possible to
manufactur...
#Lenses #Apertures #Glass #Optical devices #Fabrication #Optical fiber networks #Optical refraction #Optical variables control #Refractive index #Magnetic materials
Advantage of pseudo-binary PhaseChange material against eutectic material for application in poor rapid cooling structure
- Trang 69-71
In PhaseChange (PC) commercial disks, the PC material is used with a thick
reflector which also acts as a highly efficient heat sink providing that the
stack is well tuned regarding heat flow properties. In this case, growth
dominated materials based on the eutectic composition Sb/sub 70/Te/sub 30/ are
good candidates (Zhou-GF et al, Proc. SPIE vol. 4090, pp. 108-115, 2000).
However in some struct...
#Crystalline materials #Amorphous materials #Knee #Crystallization #Heat sinks #Phase change materials #Cooling #Composite materials #Writing #Optical materials