JP4032499B2 - Optical disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc apparatus that records and / or reproduces data on an optical disc by an optical pickup, and particularly belongs to the technical field for dustproof symmetry of an objective lens.
[0002]
[Prior art]
2. Description of the Related Art As is well known, in an optical disc apparatus, recording and / or reproduction of data with respect to an optical disc is performed by irradiating and focusing a spot beam of a laser beam on an optical disc with an objective lens of an optical pickup and receiving the reflected light by an optical system. It is carried out. Therefore, if dust mixed in the air adheres to and accumulates on the surface of the objective lens, the output of the laser beam irradiated and reflected on the optical disk is reduced, the focus is poor, etc. It is easy to cause mistakes (writing or reading failure) in data recording and / or reproduction.
[0003]
Accordingly, the applicant of the present invention has previously filed an invention of an optical disk device in which dust is not deposited on the surface of the objective lens of the optical pickup according to the prior invention described in Japanese Patent Application Laid-Open No. 5-2764. .
That is, as shown in FIG. 15, the disk cartridge type optical disk apparatus 101 according to the invention of the prior application chucks the optical disk 103 loaded by the disk cartridge 102 on the disk table 105 of the spindle motor 104 and rotates it in the direction of arrow e. While driving, an objective lens actuator unit 109 formed in a convex shape on the carriage 107 of the optical pickup 106 and incorporating the objective lens 108 and its biaxial actuator (not shown) is inserted into the disk cartridge 102, and The objective lens 108 is brought close to the optical disc 103. Then, the spot light of the laser beam LB is irradiated and focused on the optical disk 103 by the objective lens 108, and data is recorded and / or reproduced on the optical disk 103 by performing seek and tracking on the optical disk 103. .
[0004]
The optical disk device 101 of the prior invention is, as shown in FIG. 16A, a position of the optical disk 103 relative to the objective lens 108 at a position close to the objective lens 108 of the top portion 109a of the objective lens actuator 109. A dustproof wall 110 is vertically attached at a position upstream of the rotational direction (arrow e direction), and the optical disk 103 is rotated in the direction of arrow e on the surface of the optical disk 103 in the same direction as the rotational direction (arrow e direction). The dust DT mixed in the generated air flow AR is on the top side 109a of the objective lens actuator unit 109 on the windward side (upstream side in the direction of arrow e) of the dust barrier 110 and the leeward side (arrow e) of the objective lens 108. The dust DT adheres to and accumulates on the surface 108a of the objective lens 108 in such a manner that the dust DT adheres and accumulates at two locations (downstream in the direction). It is obtained so as to prevent that the.
[0005]
[Problems to be solved by the invention]
However, in the invention of the prior application, when the optical disk 103 having a low recording density such as a CD (compact disk) is rotated at a low speed, a high dustproof effect on the objective lens 108 can be exhibited. If the optical disk 103 is rotated at a high speed, such as a high-density recording optical disk 103 such as a video disk, the air flow AR itself becomes high speed, and a part of the high-speed air flow AR is generated between the dust-proof wall 110 and the optical disk 103. The vortex AR of the air flow AR that is drawn into the negative pressure region NP on the leeward side of the dust-proof wall 110 when passing through the gap 111 therebetween₁ Is generated, and as shown in FIG.₁ There is a problem that the dust DT mixed therein tends to adhere to and accumulate on the surface 108a of the objective lens 108 that is close to the leeward side of the dust-proof wall 110.
[0006]
The present invention has been made to solve the above-described problem, and prevents dust from adhering and accumulating on the surface of the objective lens even when the optical disk is rotated at a high speed. An object of the present invention is to provide an optical disc apparatus.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, an optical disc apparatus according to the present invention is an optical disc apparatus provided with an optical pickup for recording and / or reproducing an optical disc, and is disposed on the upstream side in the rotation direction of the optical disc with respect to an objective lens of the optical pickup. Rectifying means for rectifying the air flow generated on the surface of the optical disk by rotation of the optical disk so as not to flow to the surface of the objective lens;The rectifying means has a rectifying plate portion raised vertically from the optical pickup side to the optical disc side, and a protruding portion that protrudes from the top of the rectifying plate portion toward the upstream side in the rotation direction of the optical disc. WithIt is a thing.
[0008]
  The optical disc apparatus of the present invention configured as described above is disposed upstream of the objective lens of the optical pickup in the rotation direction of the optical disc, and generates an air flow generated on the surface of the optical disc by the rotation of the optical disc. Rectifying means for rectifying so as not to flow toThe rectifying means has a rectifying plate portion raised vertically from the optical pickup side to the optical disc side, and includes a protruding portion protruding from the top of the rectifying plate portion toward the upstream side in the rotation direction of the optical disc. BecauseEven if the optical disk is rotated at high speed,Air generated on the surface of an optical diskFlowCalls to peel off from the surface of the optical disc by the rectifying plate portion and the protruding portion, and rectifies so as to guide to the outer peripheral side of the optical disc by the rectifying plate portion.can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an optical disc apparatus to which the present invention is applied will be described below with reference to FIGS.
[0010]
"Explanation of the objective lens dustproof device"
First, the first embodiment of the objective lens dustproof device 81 applied to the tray type optical disc apparatus 5 of the present invention will be described with reference to FIGS. 1 to 7. An objective lens actuator unit 44 formed in a convex shape is mounted, and an objective lens 42 incorporated in the objective lens actuator unit 44 together with the biaxial actuator 45 is on the top 44 a of the objective lens actuator unit 44. Exposed. A rectifying means mounting base 43b is formed on the top 43a of the carriage 43 on the upstream side in the rotation direction (arrow e direction) of the optical disc 1 at a position separated from the objective lens actuator 44 by the space AG. The rectifying means 82 is attached by screws 83 on the rectifying means mounting base 43b. The rectifying means 82 is formed of a synthetic resin, rubber, or the like, and includes a base plate portion 82a parallel to the optical disc 1 and a rectifying plate portion 82b raised vertically from one end of the base plate portion 82a to the optical disc 1 side. The cross-sectional shape is substantially L-shaped. The base plate portion 82a is mounted on the rectifying means mounting base 43b by screws 83, and the rectifying plate portion 82b is generated on the surface of the optical disc 1 in the direction of the arrow e by rotation in the direction of arrow e. In order to rectify the airflow AG so as to guide the airflow AG toward the outer peripheral side of the optical disc 1, the planar shape is bent substantially in an L shape. The rectifying means 82 is formed of an antistatic material, or the surface of the rectifying means 82 is subjected to antistatic treatment.
[0011]
Accordingly, the optical disk 1 having a high density recording such as a DVD is chucked on the disk table 40 of the spindle motor 39, and the optical disk 1 is rotated by the spindle motor 39 at a high speed of 3600 rpm or more by the objective lens 42. The optical disk 1 is irradiated and condensed with spot light of the laser beam LB, the objective lens 42 is sought in the directions of arrows a and b by the carriage 43, and tracking is performed by the biaxial actuator 45, so that data is stored on the optical disk 1. When recording and / or reproducing at a high density, a high-speed air flow AR is generated on the surface of the optical disc 1 in the same direction as the arrow e direction. On the other hand, the rectifying means 82 mounted on the carriage 43 is located on the windward side (upstream side in the direction of the arrow e) with respect to the objective lens 42 while keeping the space AG between the objective lens actuator unit 44 and the carriage. 43 is moved together with the objective lens 42 in the directions of arrows a and b.
[0012]
Most of the high-speed air flow AR is mostly on the windward side (upstream side in the direction of arrow e) of the rectifying plate portion 82b of the rectifying means 82.₁ And is guided to the outer peripheral side of the optical disc 1, so that most of the air flow AR can be prevented from flowing to the surface 42 a of the objective lens 42.
[0013]
However, since a gap 84 of about 1 mm exists between the rectifying plate portion 82b of the rectifying means 82 and the optical disc 1, a part of the high-speed air flow AR passes through the gap 84 and is on the objective lens 42 side. To the negative pressure region NP on the leeward side (arrow e direction side) of the rectifying plate portion 82b.₁ Occurs. However, since the negative pressure region NP exists in the space AG separated from the objective lens actuator unit 44, the vortex AR₁ The dust DT mixed therein does not scatter to the surface 42a of the objective lens 42, and the leeward side surface 82b of the rectifying plate portion 82b.₂ Stays attached and deposited. In addition, since the rectifying means 82 is formed of an antistatic material or the surface thereof is subjected to an antistatic treatment, the side surface 82b of the rectifying plate portion 82b.₂ The amount of dust DT adhering to and depositing on can be greatly reduced. Therefore, the dust DT adhering to and depositing on the rectifying means 82 hardly rises again and adheres to and accumulates on the surface 42a of the objective lens 42.
[0014]
As described above, according to the optical disk device 5 of the present invention, dust DT in the air does not adhere to and accumulate on the surface 42a of the objective lens 42 even when rotating at a high speed of 3600 rpm or more. Since the output of the laser beam LB irradiated and reflected on the optical disc 1 and the focus failure do not occur at all, the data recording and / or reproduction mistake (writing or reading failure) on the optical disc 1 is not caused, and the data recording and The reproduction can always be performed stably with high accuracy. The inventor of the present invention continuously rotates for 12 hours at a high speed of 5000 rpm corresponding to approximately 24 times the rotational speed of the current CD. However, as described above, dust DT did not adhere to and accumulate on the surface 42a of the objective lens 42.
[0015]
  Next, a second embodiment of the objective lens dustproof device 81 of the present invention will be described with reference to FIG. 8. In this case, the rotation direction of the optical disc 1 (the direction of arrow e) from the top of the rectifying plate portion 82b of the rectifying means 82. For air flow intrusion projecting upstreamIs a protrusionA flange 82c is integrally formed. The air flow AR generated on the surface of the optical disk 1 by high-speed rotation is called to peel from the surface of the optical disk 1 by the flange 82c, and the side surface 82b of the rectifying plate portion 82b is called.₁ Thus, rectification can be performed so as to guide the optical disc 1 to the outer peripheral side.
[0016]
By providing such a flange 82c, the air flow AR flowing from the gap 84 between the rectifying plate portion 82b and the optical disc 1 toward the objective lens 42 is provided.₁ Therefore, it is possible to more reliably prevent dust DT from adhering to and accumulating on the surface 42a of the objective lens 42.
[0017]
  Next, a third embodiment of the objective lens dustproof device 81 of the present invention will be described with reference to FIG. 9 and FIG.TangentIn the case other than the carriage 43, for example, the straight plate-like rectifying means 82 arranged substantially perpendicular to the direction is mounted on the lifting frame 16 or the disk tray 2 of the optical pickup 41 described later. The rectifying means 82 needs to be provided in a straight line over the entire movement area of the objective lens 42 in the seek direction. The straight plate rectifying means 82 can provide the same effects as those of the first and second embodiments. In addition, when the rectifying means 82 is mounted on the carriage 43, the inertia during the seek operation in the directions of arrows a and b of the carriage 43 becomes heavy due to the increase in the weight of the carriage 43 and the air resistance caused by the air flow AR being received by the rectifying means 82. However, if the rectifying means 82 is attached to a place other than the carriage 43, the seek operation of the carriage 43 can be performed lightly and high speed access is possible.
[0018]
"Overview of optical disk device"
Next, the entire optical disc apparatus 5 will be described with reference to FIGS.
That is, first, as shown in FIG. 13, after an optical disc 1 such as a CD or DVD as a disc-shaped recording medium is horizontally placed in a recess 3 formed on the upper surface of the tray body 2A of the disc tray 2. When the tray front panel 2B of the disk tray 2 is lightly pressed in the direction of arrow a, a loading switch (not shown) is turned on, and the disk tray 2 is moved from the tray inlet / outlet 4 as shown in FIG. The optical disk 1 is automatically drawn horizontally into the disk apparatus body 6 of the optical disk apparatus 5 from the direction of arrow a, which is the loading direction, and automatically loaded onto the disk table of the spindle motor as will be described later.
[0019]
After this loading, the optical disk 1 is rotated at high speed by the spindle motor in accordance with a recording and / or reproduction command signal from the host computer, and data is recorded and / or reproduced on the optical disk 1 by the optical pickup. Then, after the reproduction of the optical disc 1, the disc tray 2 is automatically moved from the tray inlet / outlet 4 to the outside of the disc device main body 6 in the direction of the arrow b, which is the unloading direction, as shown in FIG. Unloaded.
[0020]
Next, as shown in FIGS. 1 to 12, the horizontal tray main body 2A of the disc tray 2 and the vertical tray front panel 2B perpendicular to the directions of the arrows a and b are formed of a synthetic resin or the like. A tray center P parallel to the directions of arrows a and b which are loading and unloading directions from the center portion of the recess 3 of the tray body 2A to the rear end portion (end portion on the arrow a direction side) side.₁ A bottom opening 8 having a long hole shape is formed. The disc tray 2 is configured to be driven in and out horizontally in the directions of arrows a and b with respect to the disc device main body 6 by a tray moving mechanism (not shown) of a loading mechanism.
[0021]
Next, a substantially box-shaped and shallow chassis 14 formed of synthetic resin or the like is provided inside the disk device main body 6, and an elevating frame formed of synthetic resin or sheet metal on the bottom portion 14 a of the chassis 14. 16 is attached. The lifting frame 16 includes a shock absorber composed of an elastic member such as an insulator mounting portion 17 and rubber at two locations on both the left and right sides on the rear end portion 16a side and on both the left and right sides on the front end portion 16b side. Four insulators 19 and 20 are attached. Then, a pair of left and right insulators 19 attached to the rear end portion 16a of the lifting frame 16 are attached on the bottom portion 14a of the chassis 14 by set screws 21 inserted through the center thereof, and are attached to the front end portion 16b of the lifting frame 16. A pair of left and right insulators 20 attached are attached on the tip of the lift drive lever 23 by a set screw 22 inserted through the center thereof. The elevating drive lever 23 is configured so that the elevating frame 16 is driven to move up and down in the directions of arrows c and d by a vertical rotational movement with the pair of left and right insulators 19 on the rear end portion 16a side as a rotation fulcrum. ing.
[0022]
The loading mechanism has a cam lever 34 that is rotationally driven by a loading motor (not shown). The cam lever 34 is rotatably attached to the upper portion of the front end side of the bottom portion 14 a of the chassis 14. A cam follower pin 36 attached to substantially the center of the front end of the elevating drive lever 23 is inserted into the cam groove 35 of the cam lever 34. During loading, the disc tray 2 is pulled horizontally in the direction of the arrow a from the unloading position outside the optical disc apparatus 5 shown in FIG. 13 to the loading position inside the optical disc apparatus 5 shown in FIGS. A cam groove 35 of the cam lever 34 drives the cam follower pin 36 at the tip of the lift drive lever 23 upward in the direction of arrow c, and the lift frame 16 is shown in FIG. 11 via the insulator 20 by the lift drive lever 23. Driven up in the direction of the arrow c about the pair of left and right insulators 19 from the descending position inclined obliquely downward to the ascending position ascended and leveled as shown in FIG. When the disk tray 2 is unloaded, the cam follower pin 36 is driven downward in the direction of arrow d by the cam groove 35 of the cam lever 34 in the reverse operation during loading, and the lift drive lever 23 passes the insulator 20 through the insulator 20. After the elevating frame 16 is driven to descend in the direction of the arrow d from the raised position shown in FIG. 12 to the lowered position shown in FIG. 11 around the pair of left and right insulators 19, the disc tray 2 is moved to the optical disc apparatus 5 shown in FIGS. It pushes in the direction of arrow b from the loading position inside to the unloading position outside the optical disk apparatus 5 shown in FIGS.
[0023]
Next, a spindle motor 39 is vertically mounted at a position displaced toward the front end portion 16b in the recess 25 of the lifting frame 16, and the upper end of the motor shaft 39a is made of a magnetic member such as metal. The disc table 40 is fixed horizontally. A centering guide 40a into which the center hole 1a of the optical disc 1 is fitted is integrally formed at the upper center of the disc table 40. In addition, an optical pickup 41 is mounted horizontally on the rear side of the spindle motor 39 in the recess 25 of the lifting frame 16. The optical pickup 41 includes a carriage 43 on which an objective lens 42 is mounted. An optical block that transmits and receives a laser beam to the objective lens 42 is integrally attached to a side surface of the carriage 44. An objective lens actuator unit 44 that is formed in a convex shape toward the optical disc 1 is mounted on the carriage 43, and the objective lens 42 is incorporated into the top 44 a of the objective lens actuator unit 44 by a biaxial actuator 45. ing.
[0024]
A carriage moving mechanism 47 that linearly moves the carriage 43 in the directions of arrows a and b along a pair of left and right guide shafts 46 is attached to the elevating frame 16. The carriage moving mechanism 47 is a carriage drive motor 48. , And a rack 51 that is attached to one side of the carriage 44 and is linearly driven by the pinion 50. The spindle motor 39 and the objective lens 42 are connected to the tray center P.₁ The objective lens 42 is disposed on the tray center P.₁ Are moved in the directions of arrows a and b.
[0025]
A clamper support member 52 formed of sheet metal or the like is horizontally installed between the upper end portions of the left and right side plates of the chassis 14 so as to cross the upper portion of the disc tray 2. At this position, a disc-shaped disc clamper 53 formed of a synthetic resin, which is a nonmagnetic member, moves within a circular range formed in the center of the clamper support member 52 within a certain range in the vertical and horizontal directions. It is held freely. A clamper receiver 52 a that receives a flange 53 a integrally formed on the outer periphery of the upper end of the disk clamper 53 from below is integrally formed on the outer periphery of the circular hole 54 of the clamper support member 52. A disc-shaped magnet 55 is horizontally embedded in the upper center of the disc clamper 53. Further, an upper cover 62 (described later) formed of sheet metal as a magnetic member is attached to the upper portion of the chassis 14 so as to straddle the upper portion of the clamper support member 52.
[0026]
Accordingly, as shown in FIG. 12, after the optical disk 1 is horizontally loaded into the disk device body 6 from the direction of arrow a by the disk tray 2, the elevating frame 16 is raised to the raised position in the direction of arrow c and becomes horizontal. Then, the disk table 40 is inserted upward from the bottom opening 8 of the disk tray 2, and the centering guide 40 a of the disk table 40 is fitted into the center hole 1 a of the optical disk 1 from below. The disk table 40 causes the optical disk 1 to float upward in the recess 3 of the disk tray 2, and the disk clamper 53 slightly floats upward from the flange receiver 52 a of the clamper support member 52. At this time, the disk clamper 53 is attracted onto the disk table 40 by the magnetic attraction force of the magnet 55 to the disk table 40 close to the lower surface thereof, and the optical disk 1 is horizontally chucked on the disk table 40 by the disk clamper 53. Is done.
[0027]
The optical disk 1 is rotated at a high speed of 3600 rpm or more by the spindle motor 39 in response to a recording and / or reproduction command signal from the host computer, and the carriage 43 of the optical pickup 41 is moved by the arrow a, The objective lens 42 is moved in the direction b and the tray center P is moved.₁ Along the direction of arrows a and b. Then, the spot light of the laser beam LB transmitted from the optical block is irradiated and focused on the lower surface of the optical disc 1 by the objective lens 42, and the reflected light is received by the optical block through the objective lens 42 and is received on the optical disc 1. Are recorded and / or reproduced.
[0028]
The carriage moving mechanism 47 is configured so that the carriage 43 is moved along the pair of left and right guide shafts 46 by a pinion 50 that is driven to rotate forward and backward by a carriage drive motor 48 via a gear train 49 to linearly drive the rack 51. Move in the a and b directions. Then, after recording and / or reproduction of the optical disc 1, as shown in FIG. 11, the elevating frame 16 is lowered to the lowered position in the direction of the arrow d by the eject command signal from the host computer, and the disc table 40 is moved to the disc clamper. After being unchucked from 53 and released below the optical disk 1, the optical disk 1 is horizontally placed in the recess 3 of the disk tray 2 and unloaded horizontally outside the disk device body 6 in the direction of arrow b. Is done.
[0029]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical idea of the present invention.
[0030]
【The invention's effect】
The optical disc apparatus of the present invention configured as described above can achieve the following effects.
[0031]
  According to another aspect of the present invention, the rectifying means is arranged upstream of the objective lens of the optical pickup in the rotation direction of the optical disc and rectifies the air flow generated on the surface of the optical disc by the rotation of the optical disc so as not to flow to the surface of the objective lens. WithThe rectifying means has a rectifying plate portion raised vertically from the optical pickup side to the optical disc side, and includes a protruding portion protruding from the top of the rectifying plate portion toward the upstream side in the rotation direction of the optical disc. Even if the optical disk is rotated at high speed, the air generated on the surface of the optical diskFlowCalls to peel off from the surface of the optical disk by the rectifying plate part and the protruding part, and rectifies so as to be guided to the outer peripheral side of the optical disk by the rectifying plate part.Therefore, even when the optical disk is rotated at a high speed, dust is not attached and deposited on the surface of the objective lens, and data recording and / or reproduction is stably performed with high accuracy. Therefore, the dustproof performance and high durability of the high objective lens of the optical disc apparatus can be ensured.
[0032]
  Claim 2A space is set between the rectifying plate portion and the objective lens actuator portion incorporating the objective lens, and the rectifying plate portion isBecause it is made of antistatic material or has been subjected to antistatic treatment,The amount of airflow flowing from the space between the rectifying plate portion and the optical disk to the objective lens side can be further reduced,On the surface of the objective lensDustAdhering or depositingAndEven moreSurely preventcan do.
[0033]
  Claim 3A space portion is set between the rectifying plate portion and the objective lens actuator portion in which the objective lens is incorporated, and the rectifying plate portionIs mounted on the optical pickup carriage.Rectifier plateCan be moved with the objective lens,rectifierThe cost can be reduced by reducing the size and weight of the part.
[0034]
  Claim 4A space is set between the rectifier plate and the objective lens actuator unit with the objective lens built in, and the rectifier plate is arranged at a right angle to the tangential direction of the rotation direction of the optical disc. Performance and high durability can be further ensured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2 for explaining a first embodiment of an objective lens dustproof device for an optical disk device to which the present invention is applied.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a perspective view of a main part of FIG. 2;
FIG. 4 is a perspective view showing a first embodiment of the lens dustproof device and a carriage moving mechanism of the lifting frame.
FIG. 5 is a plan view of FIG. 4;
6 is a side view taken along the line B-B in FIG. 5;
7 is a front view taken along the line CC of FIG.
FIG. 8 is a cross-sectional view similar to FIG. 1 showing a second embodiment of the objective lens dustproof device of the present invention.
9 is a cross-sectional view taken along the line DD of FIG. 10, showing a third embodiment of the objective lens dustproof device of the present invention.
FIG. 10 is a plan view of FIG. 9;
FIG. 11 is a sectional side view showing an unloading state of the loading mechanism of the optical disc apparatus of the present invention.
FIG. 12 is a cross-sectional side view showing a loading state of the same loading mechanism.
FIG. 13 is a perspective view showing an unloading state of a disk tray of the optical disk device of the present invention.
FIG. 14 is a perspective view showing a loading state of the disk tray.
FIG. 15 is a cross-sectional view showing a disk cartridge, a spindle motor, and an optical pickup of the optical disk apparatus of the prior invention.
FIG. 16 is a cross-sectional side view for explaining the objective lens dustproof device of the prior invention.
[Explanation of symbols]
1 is an optical disk, 5 is an optical disk device, 14 is an optical pickup, 42 is an objective lens, 43 is a carriage, 44 is an objective lens actuator unit, 81 is an objective lens dustproof device, 82 is a rectifier, 82a is a base plate of the rectifier , 82b are rectifying plate portions of the rectifying means, 84 is a gap, AR is an air flow, AR₁ Is the vortex of the air flow.

Claims (4)

In an optical disc apparatus provided with an optical pickup for recording and / or reproducing an optical disc,
Rectifying means arranged upstream of the objective lens of the optical pickup in the rotation direction of the optical disk and rectifies the air flow generated on the surface of the optical disk by the rotation of the optical disk so as not to flow to the surface of the objective lens. Prepared,
The rectifying means has a rectifying plate portion raised vertically from the optical pickup side to the optical disc side, and a protruding portion that protrudes from the top of the rectifying plate portion toward the upstream side in the rotation direction of the optical disc. optical disc apparatus according to claim <br/> further comprising a. A space is set between the rectifying plate portion and the objective lens actuator portion incorporating the objective lens, and the rectifying plate portion is made of an antistatic material or subjected to an antistatic treatment. The optical disc apparatus according to claim 1. 2. The space is set between the rectifying plate portion and an objective lens actuator portion in which the objective lens is incorporated, and the rectifying plate portion is mounted on a carriage of the optical pickup. Optical disk device. A space is set between the rectifying plate portion and the objective lens actuator portion in which the objective lens is incorporated, and the rectifying plate portion is arranged substantially perpendicular to the tangential direction of the rotation direction of the optical disc. The optical disc apparatus according to claim 1, wherein

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