Ricoh device allows hybrid Blu-ray/HD DVD burners
With PC Blu-ray re-writers retailing for close to $1,000,
the prospect of buying burners for both HD DVD and Blu-ray formats might
seem unappealing. A new
optical component developed by Ricoh could help bridge the gap
between the formats, however. According to EE Times, Ricoh claims its
new component enables reading and writing to both Blu-ray and HD DVD in
addition to CD and DVD. EE Times describes the part as follows:
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
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.
Ricoh will display the diffraction plate at the 2006 Optoelectronics
Exhibition in Japan this week. Equipment manufacturers will get their
hands on the device by the year's end.