Small Integrated Optical Head Device Using a Blue-Violet Laser Diode for Blu-ray Disc System

概要

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We report the first integrated optical head device using a blue-violet laser diode (LD), which is a key device for realizing a small and thin Blu-ray Disc drive. While integrating seven optical elements and semiconductor chips into one device by adopting a molded optical element with high transmittance to the blue-violet wavelength, both small aberration and the small device size of $11\,\text{mm}\times 6\,\text{mm}\times 4.1\,\text{mm}$ have been realized. We have also improved heat dissipation efficiency from this device to the base unit by adopting a newly developed package. At this time, we have implemented a performance evaluation of this small head device and have confirmed its good read/write performance as well as its adequate tolerances required for the Blu-ray Disc system.
公益社団法人応用物理学会の論文
2003-02-15