Simulations of heat generation and conduction on a land/groove disc
We applied the finite-difference time-domain (FDTD) method to an optical disc to estimate the energy absorption inside a multi-layered disc with land-and-groove structure. The FDTD method was developed to measure the electromagnetic fields generated by diffraction in a near-field. Afterwards we analyzed the heat conduction. We found that temperature transition depended not only on conductivity but on the initial distribution of the heat and on disc geometry.
Simulation on phase change mark forming process and read out signal characteristics
To obtain high bit density on a phase change optical disc, it is essential to understand what are the dominant physical effects to record marks on PC media. Computer simulation is one of the most convenient methods to consider an appropriate physical model of such a mark forming process. The authors have studied computer simulation of phase change mark forming processes. Our next step is to simulate the read out signal characteristics from the written mark, and this theme is described in this paper.
Tradeoffs and limitations in statistically based image reconstruction problems.
TRADEOFFS AND LIMITATIONS IN STATISTICALLY BASED IMAGE RECONSTRUCTION PROBLEMS