JP2000298856A - Optical head and fabrication method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical head capable of realizing power supply to an objective lens actuator without employing a flexible substrate, thereby preventing an undesirable stress from being generated at a power-supplied portion and exhibiting satisfactory assembling workability. SOLUTION: An objective lens actuator 3, which comprises a movable member on which an objective lens 4 is to be mounted and a fixed member 7 for supporting the movable member via a suspension member 6, is fixed onto a base 1. The objective lens actuator 3 comprises an adjustment current applying section 12 for supplying a lens drive signal upon position adjustment and a power supply section 13 for supplying the lens drive signal after the position adjustment. The power supply section 13 is electrically connected to a terminal member 2 after the position adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical head used for recording / reproducing an optical disk and a method of manufacturing the same, and more particularly, to an optical head characterized by a method of supplying a drive signal when adjusting the tilt of an actuator, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In general optical heads, a flexible substrate is generally used to supply signals to an objective lens actuator. However, the flexible substrate is expensive and requires three-dimensional wiring. Therefore, there is a problem that the work is complicated. As a countermeasure for this, as a method for supplying a signal without using a flexible substrate, for example, a technique described in Japanese Patent Application Laid-Open No. 9-102132 is known. Hereinafter, the technology described in the above publication will be described with reference to FIG.

The objective lens 4 is mounted on a holder 5, and the holder 5 is supported by four suspensions 6 made of a metal plate. The other end of the suspension 6 is fixed to a fixing member 7 to constitute the objective lens actuator 3 as a whole. At this time, the suspension 6 is insert-molded on the fixed member 7 and protrudes from the opposite end face of the fixed member 7. This protruding part is
The Z-shaped member 30 is formed by punching into a Z-shape. Z
The letter-shaped member 30 is deformed in the vertical direction, and its end 31 is connected to a printed board (not shown). Thus, a current for focusing adjustment and tracking adjustment is supplied from the printed board to the drive coil (not shown) via the Z-shaped member 30 and the suspension 6.

As a result, a drive signal can be supplied to the objective lens actuator 3 without using a flexible board by connecting the suspension 6 directly to a printed board (not shown).

[0005]

However, the optical head using the objective lens actuator 3 has the following problems.

First, since the Z-shaped member 30 is three-dimensionally deformed and soldered to a printed circuit board, there is a problem that a complicated operation is required. Also, the Z-shaped member 30
Has elasticity because it is made of the same material as the suspension 6. Therefore, when the Z-shaped member 30 is deformed, a restoring force acts to return to the original shape by the elastic force. If the soldering is performed on the printed circuit board in this state, since the restoring force is kept working, a stress is generated in the solder portion, and there is a problem that a connection failure such as a solder crack may occur. Further, when the attitude of the objective lens actuator 3 is adjusted, the Z-shaped member 30 is further deformed, which also causes a stress on the solder portion, which may cause a connection failure such as solder cracking. I was

The present invention provides an optical head which can supply power to an objective lens actuator without using a flexible substrate, and does not generate unnecessary stress at a power supply portion to the objective lens actuator. An object of the present invention is to provide an optical head having excellent assembling workability.

[0008]

In order to achieve the above object, the present invention has the following arrangement.

An optical head according to the present invention comprises an objective lens actuator including a movable member on which an objective lens is mounted, and a fixed member for supporting the movable member via a suspension member; a base for fixing the objective lens actuator; An adjustment current application unit provided on the objective lens actuator for supplying a lens drive signal when adjusting the attitude of the objective lens actuator; and an adjustment current application unit provided on the objective lens actuator, and adjusting the lens drive signal after adjusting the attitude of the objective lens actuator. And a power supply unit for supplying. According to this configuration, the adjustment current application unit and the power supply unit are provided, the lens drive signal is supplied via the adjustment current application unit when the posture of the objective lens actuator is adjusted, and the lens drive signal is supplied via the power supply unit after the posture adjustment. In any case, power can be supplied without using a flexible substrate. Further, no stress is generated in the power supply portion in any state after the posture adjustment and after the posture adjustment. In particular, since the power supply unit can be electrically connected after the posture adjustment, no internal stress remains at the connection portion of the power supply unit. Further, since the posture adjustment and the electrical connection of the power supply portion are not performed while the power supply portion is elastically deformed, the workability of assembling the optical head is improved.

[0010] In the above configuration, the adjustment current application unit and the power supply unit may be configured to coincide with each other. With such a configuration, the structure can be simplified.

In the above configuration, it is preferable that a terminal member made of a conductive material is provided on the base, and the terminal member and the power supply unit are electrically connected. According to this configuration, the signal can be supplied to the power supply unit without using a flexible substrate, so that the cost can be reduced and the wiring operation can be simplified.

In the above structure, it is preferable that the terminal member is formed of a strip-shaped conductive material and is formed integrally with the base. According to this configuration, the wiring to the terminal member can be formed at the same time when the base is molded, so that the number of manufacturing steps can be reduced.

Further, in the above configuration, the power supply portion is fixed to the terminal member, and the power supply portion and the terminal member are electrically connected by the fixation, and the objective lens actuator is connected to the base. Preferably it is fixed. According to this configuration, the work of electrical connection and the fixing of the objective lens actuator to the base can be performed in a single operation, so that the assembly workability is improved.

In the above configuration, the power supply unit and the terminal member may be electrically connected after the objective lens actuator is fixed to the base. According to such a configuration, since the objective lens actuator is fixed to the base at a portion different from the power supply portion,
An optical head firmly fixed can be easily obtained.

Further, in the above configuration, the adjustment current applying section is formed by exposing a part of the suspension member embedded in the fixing member to upper and lower surfaces of the fixing member, and the power supply section May be formed by projecting the suspension member embedded in the fixing member to a side surface of the fixing member.
The adjustment current applying section and the power supply section may be formed by projecting a part of the suspension member embedded in the fixing member to a side of the fixing member. According to these configurations, the adjusting current applying portion and the power supply portion can be formed simultaneously with the composite molding of the movable member, the fixed member, and the suspension member, so that the molding can be easily performed without adding a special process to the conventional molding method.
Further, by forming the adjustment current application unit and the power supply unit at the above positions, power supply to the adjustment current application unit at the time of posture adjustment of the objective lens actuator and power supply to the power supply unit after the posture adjustment can be easily performed. Can do it. Further, according to the latter configuration, the structure can be further simplified.

Next, a method of manufacturing an optical head according to the present invention comprises a movable member on which an objective lens is mounted, a fixed member for supporting the movable member via a suspension member, and an adjustment for supplying a lens drive signal. A method of manufacturing an optical head by fixing an objective lens actuator having a current application unit and a power supply unit to a base, wherein a posture of the objective lens actuator is supplied while supplying a lens driving signal via the adjustment current application unit. Performing the adjustment, fixing the objective lens actuator to the base after the attitude adjustment, and performing an electrical connection so that a lens drive signal can be supplied to the power supply unit after the attitude adjustment. It is characterized by having. According to this configuration, the lens drive signal is supplied via the adjustment current application unit when the posture of the objective lens actuator is adjusted, and the lens drive signal is supplied via the power supply unit after the posture adjustment. Power can be supplied without using a substrate. Further, since the power supply unit is electrically connected after the posture adjustment, no internal stress remains at the connection portion of the power supply unit. Further, since the posture adjustment and the electrical connection of the power supply portion are not performed while the power supply portion is elastically deformed, the workability of assembling the optical head is improved.

In the above configuration, it is preferable that, in the step of performing the posture adjustment, the power supply unit does not contact the base. According to such a configuration, the posture adjustment work is facilitated. Further, no internal stress remains in the connection portion of the power supply unit.

In the above configuration, the step of fixing the objective lens actuator to the base and the step of making an electrical connection so that a lens drive signal can be supplied to the power supply unit may be separate steps. it can. According to this configuration, an optical head in which the objective lens actuator is more accurately and firmly fixed can be obtained.

Further, in the above configuration, by fixing the objective lens actuator to the base,
At the same time, the power supply unit may be electrically connected. According to this configuration, the work of electrical connection, the fixing of the objective lens actuator to the base, and the electrical connection can be performed in a single operation, so that the assembly workability is improved.

In the above configuration, it is preferable that the electrical connection of the power supply unit is performed by electrically connecting the power supply unit to a terminal member formed on the base. According to this configuration, the signal can be supplied to the power supply unit without using a flexible substrate, so that the cost can be reduced and the wiring operation can be simplified.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

In the following description, when the direction is expressed in the present description, the upper right is referred to as the front, the lower left as the rear, the lower right as the right, the upper left as the left, the upper as the upper, and the lower as the lower in FIG.

(Embodiment 1) FIG. 1 is an exploded perspective view of an optical head according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing a configuration of an objective lens actuator at the time of tilt adjustment. 3 is a schematic side view showing a configuration at the time of adjustment.

In FIG. 1, reference numeral 1 denotes a base serving as a housing of the optical head, and 2 denotes a terminal member provided integrally with the base 1. Reference numeral 3 denotes an objective lens actuator, which includes the following components. The objective lens 4 is mounted on a holder 5 which is a movable member, and is connected to a fixed member 7 via a suspension 6. Suspension 6
Are made of four metal elastic materials and are substantially parallel to each other. Therefore, the holder 5 and the objective lens 4 can be moved vertically and horizontally relative to the fixed member 7 by deforming the suspension 6. In addition to the objective lens 4, a focus coil 8 and a tracking coil 9 are mounted on the holder 5, each of which is electrically connected to the root of the suspension 6 on the holder 5 side. In order to generate a driving force for the objective lens 4, the focus coil 8 and the tracking coil 9 are arranged in a magnetic path formed by a U-shaped yoke 10 and a magnet 11 fixed to the yoke 10. The yoke 10 is fixed to the fixing member 7.

The fixing member 7 and the holder 5 are made of a non-conductive resin, and are formed by composite molding with a metal suspension 6. That is, the suspension 6 is partially buried in the fixed member 7 and the holder 5 and integrated.

At this time, the members of the suspension 6 are formed so that a part thereof is exposed on the upper surface side and the lower surface side of the fixing member 7. That is, at the time of molding, concave portions (openings) are provided on the upper surface and the lower surface of the fixing member 7 to expose the members of the suspension 6. This exposed part becomes the adjustment current applying part 12. The suspension 6 is electrically connected to the focus coil 8 and the tracking coil 9 at the root on the holder 5 side as described above.
The focus coil 8 and the tracking coil 9 are driven by supplying a drive signal from.

The metal plate constituting the suspension 6 is formed so as to protrude from the right side and the left side of the fixing member 7. This protruding portion becomes the power supply unit 13. By supplying a drive signal from the power supply unit 13 similarly to the drive current application unit 12, the focus coil 8 and the tracking coil 9 can be driven.

Reference numeral 14 denotes a light receiving / emitting element which receives and emits a laser beam. The mirror 15 has a role to bend the optical path, and has a role to make the optical axis of the light receiving / emitting element 14 substantially coincide with the optical axis of the objective lens 4.

FIG. 4 is a perspective view of the base 1 viewed from another angle. The base 1 is made of a resin material, and a plate-shaped conductive material is insert-molded. The plate-shaped conductive material is
Terminal member 2 and substrate connecting portion 1 exposed on the surface of base 1
7 and a wiring portion 16 buried in a resin material and connecting them. The terminal member 2 is exposed on the inner peripheral surface of the base 1. The board connecting portion 17 is provided in the vicinity of the light emitting / receiving element 14 and is connected to the main flexible board 18 together with connection terminals (not shown) provided on the light emitting / receiving element 14. And other electronic circuits.

FIGS. 2 and 3 are schematic diagrams for explaining a state when the inclination of the objective lens actuator 3 is adjusted in the present embodiment. In FIG. 2, the tilt stage and the like below the base 1 are omitted. FIG.
Is a schematic diagram for explanation, and the method of taking the cross section is not accurate. The base 1, the upper contact holder 21, the lower contact holder 22, and the light emitting / receiving element 14 are indicated by broken lines. Reference numeral 19 denotes two sets of tilt stages, and reference numeral 20 denotes a holding member arranged on the tilt stage 19. The holding member 20 holds the yoke 10 by sliding in the front-rear direction or the left-right direction.

Subsequently, referring to FIG. 5, the adjustment current applying unit 1
2 will be described.

A lower contact holder 22 has two spring contacts 23a and 23b and is provided on the tilt stage 19. Reference numeral 21 denotes an upper contact holder, which has two spring contacts 23c and 23d and is rotatably attached to the lower contact holder 22. The upper contact holder 21 is configured to be urged downward by the hold spring 24. The spring contacts 23a to 23d are connected to a control circuit (not shown) via a lead wire 25. Reference numeral 26 denotes a reference disk for performing adjustment.

Upper contact holder 21, Lower contact holder 22
Are arranged so as to sandwich the fixing member 7 of the objective lens actuator 3, and are biased by the hold spring 24 so that the contact springs 23 a to 23 d
Is electrically connected to

In the optical head having the above structure,
An operation for adjusting the posture of the objective lens actuator 3 will be described.

First, the base 1 is set at a predetermined position.
At this time, the tilt stage 19 and the objective lens actuator 3 are also set at the approximate design positions, the yoke 10 of the objective lens actuator 3 is held by the holding means 20, and the upper contact holder 21 is urged downward by the hold spring 24. . At this time, the upper contact holder 2
The objective lens actuator 3 is also urged downward by being pushed by the first contact springs 23c and 23d. Therefore, the contact springs 23 of the upper contact holder 21 and the lower contact holder 22
a to 23d maintain contact with the adjustment current applying unit 12, respectively. Thus, signals can be supplied to the focus coil 8 and the tracking coil 9.

Subsequently, the reference disk 26 is set, rotated by a spindle motor (not shown), and a laser beam is emitted from the light-receiving / emitting element 14 to set the reference disk 26.
Focus on top. The light reflected from the reference disk 26 is incident on the light emitting / receiving element 14 again. The light emitting / receiving element 14 converts the incident light into an electric signal and inputs the electric signal to an electronic circuit such as a control circuit and a signal processing circuit via the main flexible substrate 18. The control circuit detects a focusing error and a tracking error of the objective lens 4 based on the input signal, and generates a drive signal for correcting the position of the objective lens 4. The drive signal includes the lead wire 25 and the contact spring 23a.
23d, focus coil 8 and tracking coil 9 via adjustment current applying unit 12 and suspension 6.
And the position of the objective lens 4 is corrected. That is, the position servo of the objective lens 4 is operated by the above signal flow.

As described above, when the position servo of the objective lens 4 is working in both the focus direction and the tracking direction, the signal recorded on the reference disk 26 can be read. The light input to the light emitting / receiving element 14 is converted into an electric signal, and is input to the signal processing unit as a reproduction signal separately from the signal input to the control circuit.
At this time, if the optical axis of the objective lens 4 is inclined with respect to the optimum position, the signal quality deteriorates. Therefore, while monitoring the reproduction signal, the inclination of the inclination stage 19 is changed,
The adjustment is performed so that the signal quality becomes highest. When the tilt stage 19 is moved, the holding member 20, the upper contact holder 21, and the lower contact holder 22 are tilted together with the tilt stage 19, so that the objective lens actuator 3 held by the holding means 20 is also tilted. At this time,
Since the parts where the tilt occurs are not connected to the base 1, the parts do not deform due to the tilt. That is, unnecessary stress does not occur.

After the tilt adjustment of the objective lens actuator 3 is completed, as shown in FIG. 6, the adhesive 2 is inserted into the gap between the fixing member 7 of the objective lens actuator 3 and the base 1.
7 is poured and cured, and the objective lens actuator 3 is fixed to the base 1. Then, the terminal member 2 and the power supply section 1
3 are electrically connected by solder 28. By this connection, a control circuit (not shown) is connected to the main flexible substrate 1.
8, the substrate connecting portion 17, the wiring portion 16 embedded in the base 1, the terminal member 2, the power feeding portion 13, and the suspension 6 are connected to the focus coil 8 and the tracking coil 9. Therefore, even if the contact between the adjustment current applying unit 12 and the contact spring 23 is released, the position of the objective lens 4 can be servo-controlled.

The hold spring 24 for urging the upper contact holder 21 downward is opened, and the holding member 20 for holding the yoke 10 of the objective lens actuator 3 is opened, so that the objective lens actuator 3 of the optical head is opened. Is completed.

As described above, according to the present invention, since the attitude of the objective lens actuator 3 is adjusted, a flexible substrate for supplying a drive signal to the objective lens actuator 3 which is conventionally generally required can be eliminated. It became.

In addition, since there is no member for elastically connecting the objective lens actuator 3 and other parts at the time of adjustment, there is no generation of stress due to deformation of the elastic member, and there is no solder cracking due to the stress. Connection failure can be eliminated.

Further, the complicated work of three-dimensionally deforming an elastic member having an extended suspension material and soldering it to a printed circuit board as described in the prior art becomes unnecessary, and the workability is improved. It became possible to plan.

In this embodiment, the power supply unit 1
3 and the adjustment current applying unit 12 are formed of the same components as the suspension 6, and a part of the suspension 6 is configured to project and be exposed from the fixing member 7. For this reason, the power supply unit 13 and the adjustment current application unit 12 need not be formed with special complicated processing, and the fixing member 7, the holder 5, and the suspension 6 of the objective lens actuator 3 have been conventionally formed by composite molding. It can be easily created by the same method as the construction method.

(Embodiment 2) A second embodiment of the present invention will be described with reference to FIG. The basic configuration, operation, and operation are the same as those of the first embodiment, and therefore, the description of the overlapping parts will be omitted.

The difference between the present embodiment and the first embodiment is as follows.
This is a point relating to the configuration of the power supply unit 13 and a method of fixing the objective lens actuator 3 to the base 1.

As shown in FIG. 7, the power supply section 13 is constituted by a metal piece 29 which is thicker than the suspension 6. The metal piece 29 is fixed to the fixing member 7 together with the suspension 6 so as to be electrically connected to the suspension 6.
And it is created by composite molding.

The method of adjusting the inclination of the objective lens actuator 3 is the same as that of the first embodiment. In the present embodiment, after the adjustment is completed, the power supply unit 13 and the terminal member 2 provided on the base 1 are connected by the solder 28 so that both are electrically connected and the objective lens actuator 3 is fixed to the base 1 at the same time. . In the first embodiment, since the power supply unit 13 is formed of the same member as the suspension 6, the power supply unit 1
Reference numeral 3 is relatively soft, and it is not possible to fix the objective lens actuator 3 to the base 1 without elastic displacement only by fixing the power supply unit 13 with solder. On the other hand, in the present embodiment, the power supply unit 13 is
9, the rigidity is high, and the power supply unit 13 can be fixed to the terminal member 2 provided on the base simply by connecting it with the solder 28.

As described above, according to the present embodiment, the operation of bonding the fixing member 7 of the objective lens actuator 3 to the base 1 using an adhesive can be omitted, and the workability is further improved. It became possible to aim at.

In each of the above embodiments,
Although the adjustment current application unit 12 and the power supply unit 13 are physically provided separately, they may be the same. For example, as shown in FIG. 8, the power supply unit 13 of the above embodiment may be configured to also serve as the adjustment current application unit 12. Accordingly, it is not necessary to form an opening for the adjustment current applying unit 12 in the fixing member 7, and the design and molding of the fixing member 7 can be simplified. In this case, the configurations of the contact springs 23a to 23d, the upper contact holder 21, and the lower contact holder 22 are changed from the above-described embodiment according to the position of the adjustment current applying unit 12.
With the configuration in which the contact springs 23a to 23d are in contact with the adjustment current applying unit 12, the same effect as in the above embodiment can be obtained.

In the above-described embodiment, the terminal member 2 provided on the base 1 is provided by compounding a metal member with the base material. However, this may be another method. For example, even with a configuration in which a general printed circuit board is attached to the base 1, it is possible to obtain the same effects as those of the above embodiment.

[0051]

As described above, according to the present invention, when the attitude of the objective lens actuator is adjusted, the attitude is adjusted while supplying the drive current through the adjustment current applying section provided on the fixed member supporting the movable member of the objective lens actuator. Is performed, and after the adjustment, the power supply unit is connected to the terminal member provided on the base. Therefore, there is a remarkable effect that a flexible substrate for supplying a drive signal to the objective lens actuator becomes unnecessary.

The adjusting current applying section can be formed by providing a concave portion (opening) in the fixing member to expose the suspension material, or can be formed by projecting to the side of the fixing member. Has an effect that it can be easily produced by a conventional method of producing an objective lens actuator.

Further, since the power supply member and the terminal member are not connected during the posture adjustment, no stress is generated due to the posture change, and there is an effect that the reliability of the connection portion is improved.

Further, after the posture is adjusted, connection can be made only by soldering in that state, and complicated work such as three-dimensionally deforming a flexible board or a terminal component and soldering is not performed. This has the effect of improving workability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a configuration of an optical head according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a state at the time of adjusting the tilt of an objective lens actuator of the optical head of FIG. 1;

FIG. 3 is a schematic side view showing a state at the time of tilt adjustment of an objective lens actuator of the optical head of FIG. 1;

FIG. 4 is a perspective view of a base of the optical head of FIG. 1;

FIG. 5 is a perspective view showing a configuration of a contact holder part for supplying a drive signal to an adjustment current applying unit of the optical head of FIG. 1;

FIG. 6 is an overall perspective view of the optical head of FIG. 1;

FIG. 7 is a schematic perspective view showing a configuration of an objective lens actuator of an optical head according to Embodiment 2 of the present invention.

FIG. 8 is a schematic perspective view showing another configuration example of the objective lens actuator of the optical head of the present invention.

FIG. 9 is a perspective view showing a schematic configuration of a conventional optical head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Terminal member 3 Objective lens actuator 4 Objective lens 5 Holder 6 Suspension 7 Fixing member 8 Focus coil 9 Tracking coil 10 Yoke 11 Magnet 12 Adjustment current applying unit 13 Feeding unit 14 Light emitting / receiving element 15 Mirror 16 Wiring unit 17 Substrate connecting unit Reference Signs List 18 Main flexible substrate 19 Tilt stage 20 Holding member 21 Upper contact holder 22 Lower contact holder 23a to 23d Contact spring 24 Hold spring 25 Lead wire 26 Reference disk 27 Adhesive 28 Solder 29 Metal piece 30 Z-shaped member 31 End

Continued on the front page (72) Inventor Takuya Wada 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D118 AA03 AA06 BA01 CD02 CD03 DC03 EA02 FB12 FC10 5D119 AA06 AA38 BA01 EA02 EA03 JA43 NA07

Claims (13)

[Claims] 1. An objective lens actuator comprising: a movable member on which an objective lens is mounted; and a fixed member for supporting the movable member via a suspension member; a base for fixing the objective lens actuator; An adjustment current application unit for supplying a lens drive signal when adjusting the attitude of the objective lens actuator; and a power supply unit provided on the objective lens actuator for supplying a lens drive signal after adjusting the attitude of the objective lens actuator. An optical head comprising: 2. The optical head according to claim 1, wherein the adjustment current application unit and the power supply unit match. 3. The terminal according to claim 1, wherein a terminal member made of a conductive material is provided on the base, and the terminal member and the power supply unit are electrically connected. Optical head. 4. The optical head according to claim 3, wherein the terminal member is made of a strip-shaped conductive material and is formed integrally with the base. 5. The power supply unit is fixed to the terminal member, and the power supply unit and the terminal member are electrically connected by the fixation, and the objective lens actuator is fixed to the base. The optical head according to claim 3, wherein: 6. The optical head according to claim 3, wherein the power supply unit and the terminal member are electrically connected after the objective lens actuator is fixed to the base. 7. The adjusting current applying section is formed by exposing a part of the suspension member embedded in the fixing member to upper and lower surfaces of the fixing member,
The said power supply part is formed by making the said suspension member embedded in the said fixed member project from the side surface of the said fixed member, The said 1st and 3rd characterized by the above-mentioned.
7. The optical head according to any one of 6. 8. The adjustment current applying section and the power supply section are formed by projecting a part of the suspension member embedded in the fixing member to a side of the fixing member. The optical head according to claim 1. 9. An objective lens comprising: a movable member on which an objective lens is mounted; a fixed member that supports the movable member via a suspension member; an adjustment current application unit for supplying a lens drive signal; and a power supply unit. A method of manufacturing an optical head by fixing an actuator to a base, the method comprising: adjusting a position of the objective lens actuator while supplying a lens drive signal via the adjustment current applying unit; and A method for manufacturing an optical head, comprising: a step of fixing the objective lens actuator to the base; and a step of making an electrical connection so that a lens drive signal can be supplied to the power supply unit after the attitude adjustment. 10. In the step of performing the posture adjustment,
The method according to claim 9, wherein the power supply unit does not contact the base. 11. The optical device according to claim 9, wherein the step of fixing the objective lens actuator to the base and the step of making an electrical connection so that a lens drive signal can be supplied to the power supply unit are separate steps. Head manufacturing method. 12. The method of manufacturing an optical head according to claim 9, wherein the electrical connection of the power supply unit is performed simultaneously by fixing the objective lens actuator to the base. 13. The method according to claim 9, wherein the electrical connection of the power supply unit is performed by electrically connecting the power supply unit to a terminal member formed on the base.