Initializer for phase-change optical media

Yoshihiro Okino; Sumio Nakahara; Masaaki Takita

doi:10.1117/12.416828

7 February 2001 Initializer for phase-change optical media

Yoshihiro Okino, Sumio Nakahara, Masaaki Takita

Proceedings Volume 4085, Fifth International Symposium on Optical Storage (ISOS 2000); (2001) https://doi.org/10.1117/12.416828
Event: Fifth International Symposium on Optical Storage (IS0S 2000), 2000, Shanghai, China

Abstract

The method and the device, which initializes phase change media standardized by formats of such as CD-RW, record type DVD and etc., are discussed. In these media it should be a state of the crystal phase with high reflectivity before recording. It is necessary to change into the crystal phase from amorphous phase in a usual state of as-depot. The method to scan the laser spot beam of the oval shape that could be processed by a more high-speed, slighter control was examined. Because the life of laser and the scanning speed of beam spot are important factors that influenced the processing cost, the life of the laser and the improvement of the process speed are considered. The most much relating to the quality of media of finished products is near field pattern of the laser. Initializer in the mechanism, which can be used in the mass production line, is designed.

Citation Download Citation

Yoshihiro Okino, Sumio Nakahara, and Masaaki Takita "Initializer for phase-change optical media", Proc. SPIE 4085, Fifth International Symposium on Optical Storage (ISOS 2000), (7 February 2001); https://doi.org/10.1117/12.416828

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