The
TrueX Technology White Paper
Introduction
| Optical
drive trends
| CD
& DVD markets
| Intro
to TrueX
Parallel
Processing ASIC
| Features
& Benefits
The
Zen TrueX Advantage
Zen's advantage is gained
through reading multiple tracks simultaneously, and by
processing the data through a custom ASIC. To understand
how this works, it is important to understand the
following three areas of Zen TrueX technology:
- Multiple Beam
Illumination - Reads multiple tracks on media
concurrently
- Broad Beam
Illumination - Reads a wider area on media
concurrently
- Parallel Processing
ASIC - Integrated signal processor and error
correction on a single circuit
Multiple
Beam Illumination
How it
Works
The Multiple Beam
approach to illuminating and detecting multiple tracks
uses a diffracted laser beam in conjunction with a
multiple beam detector array. A conventional laser diode
is sent through a diffraction grating which splits the
beam into seven discrete beams, spaced evenly to
illuminate seven tracks. The seven beams pass through a
beam splitting mirror to the objective lens and onto the
surface of the disc. Focus and tracking are accomplished
with the central beam. Three beams on either side of the
center are readable by a detector array as long as the
center is on track and in focus.
The reflected beams
return via the same path and are directed to the multiple
beam detector array by the beam splitter mirror. The
detector contains seven discrete detectors spaced to
align with seven reflected tracks. Conventional detectors
are also provided for focus and tracking.
This design uses a
conventional approach to tracking and seeks. Performance
is far greater than that of conventional drives while
maintaining lower, more disc tolerant rotational
speeds.
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