“Trying to bridge the gap between next-generation optical disk formats, Ricoh said it has developed an optical component that reads and writes all disk formats—Blu-ray Disc and HD-DVD, as well as DVD and CD—with one pickup and one objective lens,” Yoshiko Hara reports for EE Times. “Ricoh will show the optical device at the International Optoelectronics Exhibition ’06 outside Tokyo on July 12-14. The company intends to offer the device to OEMs by year’s end.”
“The component is a 3.5-mm diameter, 1-mm thick round diffraction plate with minute concentric groves on both sides which function as a diffraction grating,”Hara reports. “The diffraction plate is placed between lasers and an objective lens. The diffraction grating is designed to adjust a light beam to an optimum incident ray relative to the objective lens so that light focuses on the proper position for each disk format.”
“Although the diffraction device works for both reading and writing modes, Ricoh will initially offer the device for disk players only. Because some laser beam energy is lost at the grating, using the diffraction device for recording will require a blue laser with higher power than those used in conventional recorders,” Hara reports.
Full article here.
[Thanks to MacDailyNews Reader “Too Hot!” for the heads up.]
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