1-4.
Disc drive unit
1) Configuration
of disc drive unit.
[Optical block specifications]
CD system OPT
Skew adjustment
J
Spindle motor
Optical block ass'y
DVD system OPT
Tilt motor
i Thread motor
Configuration of thread system
Tilt sensor
Specification
DVD system
OPT
DC system
OPT
Non-deflection,
Non-deflection,
limited optical system
Optical system
unlimited
optical system
(laser coupler)
Drive unit
2-shaft
2-shaft
Object lens
Glass
Plastic
Focus error
Stigmatic
system
Differential
3-division
system
Tracking
error
DPD system
TPP system,
Laser beam
650nm
780nm
- 10-