General Description
(3) Actuator section
The actuator section consists of a focus actuator and a tracking actuator. The former focuses a laser beam on the surface of an optical disk while the latter moves the beam spot along the radius, on the surface of an optical disk (seek operation).
The actuator section is directly driven by a linear voice coil motor. The tracking actuator is based on the
(4) Separate optical sections
The optical head section has a split structure in which the fixed optics section is separated from the moving optics section to minimize seek time and positioning error. This reduces the weight of the moving parts.
The fixed optics section consists of the laser diodes, collimator lens, separation prism, condensing lens, and the optical detector.
A laser diode for recording and playback transmits one laser beam to the actuator section.
(5) Panel
The central part of the panel is hollowed out to provide enough space to enable the cartridge to be inserted by pushing it with a finger, thereby facilitating insertion.
The panel is also simply designed using an eject button that also serves as LED light emitting part.
1.2.4 Control circuit section
Figure 1.4 is a block diagram of the control circuit section and the peripheral sections.
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