System and method for simultaneously verifying optical data writ

Details System and method for simultaneously verifying optical data writ System and method for simultaneously verifying optical data writ

1996-05-22

1998-08-25

Edun, Muhammad N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369 59, 369116, G11B 700

Patent

active

057989931

ABSTRACT:
The optical disk writing system disclosed is one in which data written on an optical data writing medium is verified essentially simultaneously with writing on the medium. The written data is verified by detecting a timing of the light irradiated on the medium and by measuring return light doses at rise and fall of the light irradiated on the medium and comparing the doses thereof with predetermined reference values. The medium uses a phase transition reversible between a crystal state and an amorphous state for writing/reading/erasing of data on a data writing film, and includes a first protective film, a phase transition type data writing film, a second protective film, and a reflection film, formed in this order, on a transparent substrate. The thickness of the first protective film is set such that, of three reflectivities of the data writing film respectively in crystal, amorphous and melted states, the reflectivity in the crystal state and the reflectivity in the melted state are made different from each other, and the reflectivity in the amorphous state and the reflectivity in the melted state are made different from each other. A high speed writing operation can be carried out and an overwrite operation can be completed in one disk rotation time.

REFERENCES:
patent: 4680594 (1987-07-01), Bracht
patent: 5517471 (1996-05-01), Ashinuma et al.
patent: 5627813 (1997-05-01), Miyashita
patent: 5646924 (1997-07-01), Nonoyama et al.

Affiliated with

Also associated with

Rating

System and method for simultaneously verifying optical data writ does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for simultaneously verifying optical data writ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for simultaneously verifying optical data writ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-41241