Optical disk apparatus
An optical disc device and optical disc technology, applied to the configuration/installation of the head, the recording of information on the magnetic disc, and the recording/reproduction of optical methods, which can solve the problems of inability to switch the optical system and inability to replay information, etc.
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Embodiment 1
[0084] The following uses figure 1 The optical disc device according to Embodiment 1 of the present invention will be explained.
[0085] The optical disc device of this embodiment 1 is for 1-layer DVD, 2-layer DVD, CD and CD-R
[0086] The device for making judgments. in figure 1 Wherein, 100 is a recording disk, which is carried on the tray 149;
[0087] 147 is a microcomputer (hereinafter referred to as a microcomputer). When the recording disc 100 is loaded on the carriage 149, the microcomputer drives the motor 118 to move the carriage 149, thereby loading the recording disc 100 on the rotating shaft 102 of the motor 101.
[0088] A laser 105 (wavelength 650nm), a coupling lens 106, a polarized beam splitter 107, a quarter-wavelength plate 108, a total reflection mirror 109, a photodetector 111, a motor 128, and an actuator 112 are installed on the transfer table 104, 127. The transfer table 104 is moved in the radial direction of the recording disk 100 by a transfer motor ...
Embodiment 2
[0136] The second embodiment of the present invention will be described below.
[0137] Figure 4 It is a block diagram of an optical disc device according to the second embodiment of the present invention. in Figure 4 Here, the same symbols as in the above-mentioned embodiment 1 denote the same parts, and this embodiment 2 is used to discriminate between DVD and CD (however, it is impossible to discriminate between 1-layer DVD and 2-layer DVD).
[0138] In the optical disc device according to the second embodiment, the newly added components in the configuration of the optical disc device of the first embodiment are the band pass filter 160 and the comparator 161, and the band pass filter 160 can only pass signals of a predetermined frequency. When the input signal exceeds a predetermined value, the comparator 161 outputs a high-level signal. Therefore, whether or not the output value of the comparator 161 is at a high level can be used to determine whether a signal in the pass...
Embodiment 3
[0150] The third embodiment of the present invention will be described below.
[0151] Figure 6 It is a block diagram showing the structure of the optical disc device according to the third embodiment. The same symbols as those in the first embodiment above denote the same parts. The difference between the optical disc device according to the third embodiment and the device of the first embodiment above is that the actuators 112, 127 and the condenser lenses 110, 126 are replaced with actuators 172. Condenser lens 170 and hologram 171.
[0152] use Figure 7 To illustrate this optical system, the hologram 171 is only formed near the center of the optical axis of the beam 150; the beam 150 passing through the condenser lens 170 is condensed into the focal point F for CD CD And focus F for DVD DVD , Focus F for CD CD Focus F than DVD DVD It is located farther away from the condenser lens 170. The distance between the focal point FCD for CD and the focal point FDVD for DVD is about...
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Abstract
Description
Claims
Application Information
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