JP2002122771A - Method and device for mounting mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjusting device for mounting a deflection mirror, used for a floating type optical pickup in a frame with a right posture and at a right angle. SOLUTION: A 1st gonio stage 35 and a 2nd gonio stage 45 are arranged in an overlaid state, and a mirror holder 66 is fitted to the bearing surface 65 of the frame 62, while supporting the mirror holder 66 by a support table 58 arranged at the tip part of a main shaft 56 positioned on the tip side of the 2nd gonio stage 45, and in such the state, the 1st gonio stage 35 and the 2nd gonio stage 45 are swingingly turned on a 1st revolving rotating surface and a 2nd revolving rotating surface which are orthogonal to the reflection surface of the mirror and which cross each other, moreover including the optical axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for mounting a mirror, and more particularly to a method and an apparatus for mounting a mirror for mounting a mirror at a correct angle or a correct posture with respect to a member to be mounted.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Patent Application Laid-Open No. 10-177834, an optical disk player is used for recording digital signals. The optical disc player rotates the pickup arm while rotating the optical disc constituting the recording medium so that the tip of the pickup arm moves in a substantially radial direction with respect to the optical disc, and uses the optical head provided at the tip of the arm. A signal recorded on an optical disk is read out, or a signal is recorded on the optical disk.

In such an optical disk, a deflecting mirror is provided so that a laser beam is incident on the optical head attached to the tip end of the pickup arm at a correct angle or that the read laser beam is emitted. It is arranged at an angle of 45 degrees obliquely above the optical head. Here, the above-mentioned deflection mirror is attached to the tip of the pickup arm via a frame.

Therefore, the frame must be correctly mounted on the pickup arm. It also requires that the mirror be mounted at the correct angle to the frame. If at least one of the attachment of the frame to the arm and the attachment of the mirror to the frame is not correct, the laser beam cannot be correctly incident on the optical head, thereby making high-precision recording or reproduction impossible. Become.

Conventionally, in order to properly mount the mirror on the frame, the mirror 1 is first fixed to the mirror holder 2 as shown in FIGS. Then, the mirror holder 2 is attached to the frame 3 with the angle adjusted correctly. Here, the frame 3 is formed with a seat surface 4 which is substantially circular and formed of a conical surface, and is mounted so that the outer peripheral portion of the mirror holder 2 comes into contact with the seat surface 4.

In such a state, the optical axis 5 of the laser beam
Is press-adjusted by the press-adjustment screw 6 from the lower surface of the mirror holder 2 so that is incident from above, reflected at an angle of 90 degrees, and emitted in the lateral direction.

That is, here, four pressing adjusting screws 6 are provided, and these four adjusting screws 6 are arranged on the lower surface of the mirror holder 2 at 90 ° intervals along the circumferential direction thereof, and these pressing adjusting screws 6 are provided. The angle of the mirror holder 2 with respect to the seat surface 4 of the frame 3 is adjusted to an appropriate angle by adjusting the amount of pressing of the adjusting screw 6. Therefore, in this case, as shown in FIG. 7, the four pressing portions 7 on the lower surface of the mirror holder 2 are respectively pressed by the pressing adjustment screws 6 to adjust the angle.

[0008]

As described above, when the conventional deflection mirror 1 is mounted on the frame 3, the four pressing portions 7 of the mirror holder 2 are pressed and adjusted by the pressing adjustment screws 6. . Such a method is performed by adjusting the four pressure adjusting screws 6 for adjusting the angle in order to direct the optical axis 5 in an appropriate direction.

Here, the angle of the mirror 1 is adjusted to the correct angle while extending and retracting the rods of the respective pressing adjustment screws 6, but there is a drawback that requires a high degree of skill and time. When pressing with the pressing adjustment screw 6, it is necessary to loosen the pressing adjustment screw 6 on the opposite side 180 degrees away. If such an operation is neglected, there is a problem that a large force acts on the mirror holder 2, thereby breaking the mirror holder 2 or damaging the pressing adjustment screw 6.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a method and an apparatus for mounting a mirror in which the angle of the mirror can be easily adjusted when the mirror is mounted on a member to be mounted. The purpose is to do.

[0011]

SUMMARY OF THE INVENTION A primary invention relating to a method of mounting a mirror is to make a first angle adjustment by pivoting the mirror in a first plane orthogonal to its reflecting surface and including the optical axis, and then. A method of mounting a mirror, wherein a second angle adjustment is performed by rotating a mirror in a second plane orthogonal to the reflection surface and including the optical axis and substantially orthogonal to the first plane. It is.

Here, while the mirror is held by the mirror holder, the first angle adjustment and the second angle adjustment are performed while the mirror holder is elastically pressed against the seating surface of the frame. In this state, the mirror holder may be fixed to the frame with an adhesive. Further, the contact surface of the mirror holder, which is in contact with the seating surface of the frame, is formed of a spherical surface, and the first angle adjustment and the second angle adjustment are performed while the mirror turns around the center of the spherical surface. It is preferable to do so.

A main invention relating to a mounting device is a mirror mounting device for mounting a mirror at a correct angle with respect to a frame fixed in advance, wherein a Z-axis stage for moving the mirror in the optical axis direction and the mirror are mounted on the Z-axis stage. A first goniostage that is rotated in a first plane orthogonal to the reflecting surface and includes the optical axis to perform a first angle adjustment, and the mirror is orthogonal to the reflecting surface and includes the optical axis, and And a second gonio stage that performs a second angle adjustment by pivoting in a second plane substantially orthogonal to the first plane.

Here, the angle may be adjusted while the mirror is supported at the tip of the main shaft of the second gonio stage. The main shaft of the second gonio stage may be supported slidably in the axial direction with respect to the mover, and may be elastically urged to press the mirror. Further, the mirror may be held by a mirror holder, and a hole may be formed in a substantially central portion of a back surface of the mirror holder, so that a pin provided at a tip portion of the main shaft may be received in the hole. Further, the seating surface of the frame is formed of a conical surface, and the contact surface of the holder holding the mirror is formed of a spherical surface, and the first gonio stage and the second
It is preferable that each of the gonio stages performs a rotary motion. Further, the mirror may be a mirror attached to a pickup arm of an optical disk and reflecting light incident on the optical disk or light emitted from the optical disk.

A preferred embodiment of the invention included in the present application is a pair of gonio stages that perform a revolving motion about a center of a spherical surface abutting on a bearing surface of a frame of a holder for holding a deflecting mirror and revolve at angles orthogonal to each other. Is used. Here, by using two sets of gonio stages orthogonal to each other, it is possible to perform adjustment at all reflection angles within the allowable angle of these gonio stages.

The main shaft of the second gonio stage is slidably supported so that the mirror holder holding the mirror can surely contact the seat surface of the frame. Is provided. With such a mechanism, even if the center position of the mirror holder is shifted, a function to correct the center position is operated. In addition, a center hole is provided in the center of the mirror holder, and a pin received by the center hole is arranged at the tip of the main shaft so as to prevent the mirror holder from being positioned and the mirror holder from falling.

According to the invention according to this aspect, the adjusting means attached to each gonio stage, for example, a precision adjusting screw, adjusts the first direction and the direction perpendicular to the first direction. , The optical axis can be easily adjusted. Further, since the force for pressing the deflecting mirror against the seating surface of the frame is set by the elastic restoring force of the coil spring, by setting the elastic restoring force of the coil spring to an appropriate value, it becomes impossible to force the mirror holder. No pressing force is applied,
Damage to the mirror holder and the frame is prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows a use state of a mirror mounted by the method according to the present embodiment. That is, the deflecting mirror attached by the attaching method or the attaching device of the present embodiment is a mirror attached to the tip of the pickup arm of the optical disk player, and is attached to this arm via the frame.

The optical disk player uses a disk-shaped optical disk 11 as a recording medium.
1 is used to record a digital signal. A pickup arm 12 is provided so that the tip can move in the radial direction with respect to the optical disk 11. The arm 12 is rotatably supported by a rotation support shaft 13, and its rotation is controlled by a servomotor 14.

A floating type optical head 18 is attached to a portion on the tip side of the arm. The optical head 18 is supported by a flexure beam 19, which is connected to the lower surface of the arm 12 so as to protrude from the distal end as shown in FIG. A light source module 20 for emitting laser light is attached to the base end side of the arm 12, and a rotatable galvanomirror is mounted on the arm 12 so as to face an emission window of the light source module 20. 21 are attached. A deflecting mirror 22 is mounted on the arm 12 at the distal end of the arm 12 so as to guide the light reflected by the galvano mirror 21 in the length direction of the arm 12 to the optical head 18. .

The deflecting mirror 22 is, as shown in FIG.
The laser beam from the light source module 20 reflected by the galvanomirror 21 is attached to the floating optical head 18 at an angle of 45 degrees through the frame 62 to the tip side portion of the arm 12. The optical head 18 focuses the laser beam to focus on the upper surface of the optical disk 11. Therefore, it is necessary to attach the deflection mirror 22 to the frame 62 at a correct angle. The mounting method or mounting device of this embodiment relates to a method and a device for mounting such a deflecting mirror 22 on a seating surface of a frame 62 at a correct angle and in a correct posture.

Next, the mounting device will be described with reference to FIGS. This mounting device is provided with a base 29 on the lowermost side as shown in FIGS. On the base 29, a Z-axis stage 30 is provided. The Z-axis stage 30 is a device that can be moved and adjusted in the Z-axis direction, that is, in the axial direction of the device. By adjusting the rotation of the adjusting screw 32, the height is adjusted.

A first gonio stage 35 is provided on the Z-axis stage 30. The first gonio stage 35 has a base 36, and a turning rotator 37 on the base 36. As shown in FIG. 5, the turning rotator 37 turns and turns along an arc-shaped sliding surface on the upper surface of the base 36. A support bracket 38 is attached to the side of the base 36, and a precision adjustment screw 39 is supported by the support bracket 38. The rod 40 on the distal end side of the adjusting screw 39 is used as the rotating
The pressed block 41 on the side of 7 is pressed. Therefore, the pressed block 41 is pushed by the operation of the precision adjustment screw 39, and the turning rotator 37 makes a turning motion.

A second gonio stage 45 is mounted above the first gonio stage 35. The goniometer stage 45 has a base 46 as shown in FIG.
And a turning rotator 47 for turning on a curved sliding surface of the base 46. Here, the turning surface of the second gonio stage 45 is perpendicular to the first gonio stage 35. The base 46
Is mounted with a support bracket 48, and a precision adjustment screw 49 is mounted on the support bracket 48. The rod 50 on the tip side of the precision adjusting screw 49 is
The pressing block 51 attached to the side of the pressing member 7 is pressed. Therefore, by rotating and adjusting the precision adjusting screw 49, the turning rotator 47 of the second goniometer stage turns on the base 46.

A sleeve 55 is protruded and fixed to the upper part of the turning rotator 47 of the second goniometer stage 45. The main shaft 56 is slidably supported by the sleeve 55. The main shaft 56 is urged to slide upward by a coil spring 57 in a direction protruding upward. A support base 58 is attached to the tip of the main shaft 56,
A positioning pin 59 is implanted at the center of the support base 58.

The deflecting mirror 22 mounted by such a mounting device is mounted on a seat surface 65 of a frame 62 as shown in FIG. Frame 62
Has a substantially L-shaped cross section including an entrance window 63 into which laser light is incident and an opening 64 from which the laser light reflected by the mirror 22 is emitted. The deflecting mirror 22 is fixed to a mirror holder 66. A center hole 67 is formed substantially at the center of the lower surface of the mirror holder 66, and the center hole 67 receives the positioning pin 59 of the main shaft 56.

Here, the seat surface 65 constituting the mounting seat of the deflecting mirror 22 of the frame 62 is formed of a conical surface. On the other hand, the outer peripheral surface of the mirror holder 66 that holds the deflecting mirror 22 and that comes into contact with the seat surface 65 is formed of a spherical surface 68.

As described above, the apparatus for attaching the deflecting mirror 22 to the frame 62 according to the present embodiment adjusts the attaching angle or the attaching posture of the deflecting mirror 22 to the frame 62, whereby the incident light from a certain direction is optimally reflected. It is adjusted to a position that matches the light. That is, by adjusting the pair of gonio stages 35 and 45 with the fine adjustment screws 39 and 49, respectively, the main shaft 56 attached to the second gonio stage 45 is aligned with the center 70 (see FIG. 6) of the spherical surface 68 of the mirror holder 66. The angle of the mirror 22 is changed while performing a swiveling motion about the center. Here, the first goniometer stage 35
The second gonio stage 45 and the second gonio stage 45 have a relationship in which their turning angles are perpendicular to each other. In addition, the joint between the outer peripheral surface 68 of the mirror holder 66 formed of a spherical surface and the seat surface 65 of the frame 62 is softly rubbed and brought into contact.

Next, the operation of attaching the deflecting mirror 22 by the attaching device having the above configuration will be described. First, the frame 62 to which the mirror holder 66 is attached is correctly fixed at a predetermined position by fixing means (not shown). Then, a photocurable adhesive is applied to the bearing surface 65 of the frame 62 in advance. On the other hand, a mirror holder 66 to which the deflecting mirror 22 is mounted is arranged on a support base 58 on the distal end side of the main shaft 56 of the mounting device. At this time, the center hole 67 of the mirror holder 66 receives the positioning pin 59 of the main shaft 56. At this time, a photocurable adhesive may also be applied to the outer peripheral surface of the mirror holder 66 having a spherical surface.

Next, the Z-axis stage 30 is extended. That is, the precision adjustment screw 32 of the drive unit 31 is adjusted, whereby the pair of gonio stages 35 and 45 on the Z-axis stage 30 are slowly moved upward. Then, as shown in FIG. 4, the mirror holder 66 mounted on the support base 58 at the tip of the main shaft 56 is fitted to the seating surface 65 of the frame 62. Then, in such a state, an optical detection device for detecting the light reflected by the deflection mirror 22 is set.

Next, the precision adjusting screw 39 of the first gonio stage 35 shown in FIG. 5 is rotationally adjusted, whereby the rotary rotator 37 is rotated with respect to the base 36 of the stage 35 in the direction indicated by the arrow 71. . As a result, the main shaft 56 is turned in a first plane orthogonal to the reflection surface of the deflecting mirror 22 and including the optical axis.

Next, the precision adjusting screw 49 of the second gonio stage 45 is rotated and adjusted, and the turning rotator 47 of the second gonio stage 45 is moved along the arcuate curved surface of the base 46 as shown in FIG. It is turned in the direction of arrow 72. The turning movement at this time is performed in a plane orthogonal to the reflection surface of the deflecting mirror 22 and including the optical axis, and substantially orthogonal to the turning rotation surface of the first gonio stage 35.

That is, the first gonio stage 35 and the second gonio stage 45 are respectively turned in a pair of turning planes orthogonal to each other. At this time, the reflected light reflected by the deflecting mirror 22 is detected by the reflected light detecting device. If the deflecting mirror 22 reflects the light in the correct direction, the adjustment ends at that stage. On the other hand, if the light is not reflected in the correct direction, the above adjustment, that is, the adjustment by the first gonio stage 35 or the adjustment by the second gonio stage 45 is repeated again. When the light reflected by the deflecting mirror 22 is reflected in the correct direction, it is determined that the position is the correct angle or the correct posture of the mirror holder 66 with respect to the frame 62, and at this stage, light is irradiated to the frame 62 and the mirror holder 66. Is cured by light to solidify the photocurable resin interposed therebetween. Thus, the attachment of the mirror holder 66 to the frame 62 is completed.

According to such a device for mounting the deflecting mirror 22, the fine adjustment screw 39 of the first gonio stage 35 and the fine adjustment screw 49 of the second gonio stage 45 are used to make two orthogonal rotations. Thus, the optical axis of the deflecting mirror 22 can be easily adjusted. In addition, since the adjustment is achieved by independent adjustment in two directions orthogonal to each other, not only skill is not required but also the adjustment time is greatly reduced. The deflection mirror 22
Is attached to the frame 62 by the coil spring 57, so that the deviation of the angular center is reliably corrected. Further, since the coil spring 57 is used to resiliently press the mirror holder 66, the mirror holder 66 does not exert an excessive pressing force on the frame 62, thereby preventing the mirror holder 66 and the frame 62 from being damaged. Will be done.

[0035]

The main invention relating to the mounting method is to make a first angle adjustment by rotating the mirror in a first plane orthogonal to the reflection surface and including the optical axis, and then moving the mirror to the reflection surface. The second angle adjustment is performed by turning in a second plane that is orthogonal to the optical axis and that is substantially orthogonal to the first plane.

Therefore, according to such a mirror mounting method, it is possible to correctly adjust the mirror mounting angle or mounting posture by performing the first angle adjustment and the second angle adjustment, respectively. It is possible to mount the mirror in a short time without requiring any skill.

The main invention relating to the mounting device is a mirror mounting device for mounting a mirror at a correct angle with respect to a frame fixed in advance, a Z-axis stage for moving the mirror in the optical axis direction, and a mirror for reflecting the mirror. A first goniostage that is rotated in a first plane that is orthogonal to the optical axis and performs a first angle adjustment, and a mirror that is orthogonal to the reflecting surface and that includes the optical axis and is located on the first plane. And a second gonio stage that makes a second angle adjustment by rotating in a second plane that is substantially orthogonal.

Therefore, according to such a mirror mounting device, there is provided a mirror mounting device capable of mounting the mirror at a correct angle or a correct posture with respect to the frame.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an optical disk player.

FIG. 2 is an enlarged sectional view of a main part showing a read or write operation by a pickup arm of the optical disk player.

FIG. 3 is a perspective view of a main part of a mirror mounting device.

FIG. 4 is a front view of the attachment device.

FIG. 5 is a side view of the attachment device.

FIG. 6 is an enlarged sectional view of a main part showing attachment of a mirror holder to a frame.

FIG. 7 is an enlarged longitudinal sectional view of a main part showing a structure for mounting a conventional mirror.

FIG. 8 is a bottom view of the mirror holder showing pressing of the mirror holder in the mounting.

[Explanation of symbols]

1 ‥‥ mirror, 2 ‥‥ mirror holder, 3 ホ ル ダ frame,
4mm seat, 5mm optical axis, 6mm adjusting screw, 7mm
Pressing part, 11 ‥‥ optical disk, 12 ‥‥ arm, 13 ‥
{Rotating support shaft, 14} Servo motor, 18} Floating optical head, 19> Flexure beam, 20> Light source module, 21> Galvano mirror, 22> Deflection mirror, 29> Base, 30 ° Z-axis stage, 31 °
Drive, 32 ‥‥ precision adjustment screw, 35 ‥‥ first goniometer, 36 ‥‥ base, 37 ‥‥ rotating rotator, 38 ‥
‥ Support bracket, 39 ‥‥ Precision adjustment screw, 40 ‥‥ Rod, 41 ‥‥ Pressed block, 45 ‥‥ Second goniostage, 46 ‥‥ Base, 47 ‥‥ Swirl rotator, 48 ‥
‥ Support bracket, 49 ‥‥ Precision adjustment screw, 50 ‥‥ Rod, 51 ‥‥ Pressed block, 55 ‥‥ Sleeve, 5
6 ‥‥ spindle, 57 ‥‥ coil spring, 58 ‥‥ support base, 5
9 ‥‥ positioning pin, 62 ‥‥ frame, 63 ‥‥ window,
64 ° opening, 65 ° bearing surface (conical surface), 66 ° mirror holder, 67 ° center hole, 68 ° spherical surface, 70 ° center, 71, 72 ° arrow

Claims (9)

[Claims] 1. A first angle adjustment is made by pivoting a mirror in a first plane perpendicular to its reflecting surface and including the optical axis, and then moving the mirror orthogonal to the reflecting surface and including the optical axis. A mirror mounting method, wherein the mirror is turned in a second plane substantially orthogonal to the first plane to perform a second angle adjustment. 2. The method according to claim 1, wherein the first angle adjustment and the second angle adjustment are performed while the mirror is held by a mirror holder and the mirror holder is elastically pressed against the seating surface of the frame. The method according to claim 1, wherein the mirror holder is fixed to the frame with an adhesive in a state where the mirror holder has been made. 3. A contact surface of the mirror holder, which is in contact with a seating surface of the frame, is formed of a spherical surface, and the first angle adjustment and the second angle adjustment are performed while the mirror rotates around a center of the spherical surface as a center of rotation. 2. The method according to claim 1, wherein the angle adjustment is performed. 4. A mirror mounting device for mounting a mirror at a correct angle with respect to a frame fixed in advance, a Z-axis stage for moving said mirror in the optical axis direction, said mirror being orthogonal to a reflection surface thereof, and A first gonio-stage that is rotated in a first plane including an optical axis to perform a first angle adjustment; and a mirror that is orthogonal to the reflection surface of the mirror and includes an optical axis and is substantially orthogonal to the first plane. And a second gonio stage that makes a second angle adjustment by rotating in a second plane. 5. The mirror mounting apparatus according to claim 4, wherein the angle adjustment is performed in a state where the mirror is supported at a tip of a main shaft of the second gonio stage. 6. A main shaft of the second gonio stage is supported slidably in an axial direction with respect to a mover, and is elastically urged to press the mirror. The mirror mounting apparatus according to claim 4, wherein 7. A mirror is held by a mirror holder, and a hole is formed in a substantially central portion of a back surface of the mirror holder, and a pin provided at a tip portion of the main shaft is received in the hole. The mirror mounting device according to claim 5 or 6, wherein the mirror is mounted. 8. The first goniostage, wherein a seat surface of the frame is formed of a conical surface, and a contact surface of a holder for holding the mirror is formed of a spherical surface, and the center of the spherical surface is a center of rotation. The mirror mounting device according to claim 4, wherein the second gonio stage and the second gonio stage perform a rotational movement. 9. The optical disk drive according to claim 4, wherein said mirror is mounted on a pickup arm of an optical disk, and is a mirror for reflecting light incident on said optical disk or light emitted from said optical disk. Mirror mounting device.