Title :
High-resolution readout from magneto-optical read-only-memory
Author :
Birukawa, Masahiro ; Miyatake, Norio ; Suzuki, Takao
Author_Institution :
Toyota Technol. Inst., Nagoya, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
A high-resolution readout from MO-ROM method, which utilizes a difference in coercivity between “rough” and “smooth” areas in a disk is discussed. The readout performance is demonstrated using optical head of 680 nm wavelength and NA 0.55. It is found that the signal from mark length of 0.25 μm can be obtained in spite of 1.1 μm in spot size (1/e2). The observed readout signal is also found to be in reasonable agreement with a simulated result based on MO-ROM readout principle
Keywords :
coercive force; magneto-optical recording; optical disc storage; read-only storage; 0.25 micron; 1.1 micron; 680 nm; MO-ROM method; coercivity; high-resolution readout; magneto-optical read-only-memory; mark length; optical head; spot size; Apertures; Coercive force; Iron; Magnetooptic recording; Optical films; Optical recording; Optical refraction; Optical variables control; Read only memory; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
