JP2004047106A - Method for manufacturing disk recorder/player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a small/thin optical head and a disk recorder/player by drastically reducing the overall height of an optical head. <P>SOLUTION: An integrated unit 7 is fixed to an optical bench 16. Relative positions and optical axes among a semiconductor laser, an objective lens and a multi-divided photodetector are adjusted in adjusting a focus error signal and a tracking error signal of the optical head by planarly adjusting an objective lens driving device 13 in a radial direction (X direction) and in a tangential direction (Y direction). <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a method for manufacturing a disk recording / reproducing apparatus for optically recording / reproducing information by projecting a light spot on a disk-shaped recording medium.

In recent years, disk recording / reproducing devices, such as those for DVD, MD, CD, and CD-ROM, have been diversifying year by year, and are becoming more and more dense, compact, high-performance, high-quality, and high-value-added. In particular, in a disk recording / reproducing apparatus using a recordable magneto-optical medium, the demand for data / video recording is on a tremendous increase, and a further reduction in size, thickness, performance, and recording density is required. I have.

Conventionally, there have been many reports on the technology relating to an optical head for a magneto-optical disk.

Hereinafter, an optical head for a magneto-optical disk will be described as an example of a conventional disk recording / reproducing apparatus with reference to the drawings.

FIGS. 10, 11, 12, and 13 are schematic diagrams of a conventional optical head and a diagram for explaining the operation principle thereof.

10, 11, 12 and 13, 1 is a silicon substrate, 2 is a semiconductor laser fixed on the silicon substrate 1, 3 is a multi-segmented photodetector formed on the silicon substrate 1, and 4 is a resin package. Reference numeral 5 denotes a hologram element (diffraction grating) formed of a resin, 6 denotes a composite element including a beam splitter 6a, a folding mirror 6b, and a polarization separation element 6c; 8 denotes a silicon substrate 1, a semiconductor laser 2, and multi-divided light detection A holder for holding an integrated unit 7 composed of a container 3, a package 4, a diffraction grating 5, and a composite element 6, 9 is a reflection mirror, 10 is an objective lens fixed to an objective lens holder 11, and 12 has a magneto-optical effect A magneto-optical recording medium, 13 is an objective lens driving device for driving the objective lens in the focusing and radial directions of the magneto-optical recording medium 12, and 14 is an objective lens. A base which is a component of the driving device 13, 15 is a tilt screw, 16 is an optical table, 17 is a light spot for detecting a focus error signal formed on the multi-segment photodetector 3, and 18 is a multi-segment photo detector 3. , A main beam (P-polarized light) formed on the multi-segment photodetector 3, and a main beam (S) formed on the multi-segment photodetector 3. Polarization), 21 is a focus error signal light receiving area, 22 and 23 are tracking error signal light receiving areas, 24 is an information signal light receiving area, 25 is a subtractor, 26 is an adder, and 27 and 28 are light spots for detecting a focus error signal. Is the focus.

The operation of the conventional example configured as described above will be described below.

(4) The light emitted from the semiconductor laser 2 is separated by the hologram element 5 into a plurality of different light beams. The plurality of different light beams pass through the beam splitter 6a of the composite element 6, are reflected by the reflection mirror 9, and are fixed on the objective lens holder 11 by the objective lens 10 to form a light spot 30 having a diameter of about 1 micron on the magneto-optical recording medium 12. As light.

{Circle around (4)} The light beam reflected by the beam splitter 6a of the composite element 6 is incident on a laser monitoring light receiving element (not shown) to control the driving current of the semiconductor laser 2.

(4) The reflected light from the magneto-optical recording medium 12 follows the reverse path, is reflected and separated by the beam splitter 6a of the composite device 6, and enters the return mirror 6b and the polarization separating device 6c.

The semiconductor laser 2 is installed so as to have a polarization direction parallel to the paper surface in FIG. 11 (A), and the incident light is rotated by 45 degrees by the polarization separation element 6c and two polarization components orthogonal to each other. The light is separated into light beams and enters the information signal light receiving region 24.

  Of the light reflected from the information recording medium 12, the light transmitted through the beam splitter 6a is split into a plurality of light by the diffraction grating 5 and condensed on the focus error signal light receiving area 21 and the tracking error signal light receiving areas 22 and 23.

Focus servo is performed by the so-called SSD method, and tracking servo is performed by the so-called push-pull method.

(4) Further, by taking the difference between the main beam 19 composed of P-polarized light and the main beam 20 composed of S-polarized light, it is possible to detect a magneto-optical disk information signal by a differential detection method. Further, by taking the sum of them, it is possible to detect a pre-pit signal.

  The reflection mirror 9 is fixed to the optical bench 16, and the integrated unit 7 is fixedly adhered to the holder 8, and is fixed to the end surface of the optical bench 16.

In the disk recording / reproducing apparatus configured as described above, in order to obtain a desired detection signal by reflected light from the magneto-optical recording medium, the relative positions of the semiconductor laser 2, the objective lens 10, and the multi-segmented photodetector 3 during assembly. Adjustments are made.

With respect to these relative position adjustments, in the above-described conventional apparatus, the position of the multi-segmented photodetector 3 in the Z ′ axis direction (optical axis direction) is such that the light receiving surface is located substantially at the center between the focal points 27 and 28 of the light spot. It is uniquely determined by defining the dimensions of the optical bench 16 and the holder 8 so as to perform the above. The focus error signal and the tracking error signal are adjusted by holding the holder 8 with an external jig and moving the integrated unit 7 in the X and Y directions, so that the outputs of the tracking error signal light receiving regions 22 and 23 are substantially reduced. Adjusted to be uniform.

  On the other hand, the relative inclination between the magneto-optical recording medium 12 and the objective lens 10 is adjusted by rotating the tilt screw 15 so that the spherical sliding portion of the base 14 and the spherical sliding portion of the optical base 16 which are components of the objective lens driving device 13 are rotated. Are brought into contact with each other to rotate the base 14, so-called spherical tilt. The center of rotation at this time is the principal point 10a of the objective lens 10. 10 and 13, θR indicates skew adjustment in the radial direction, and θT indicates skew adjustment in the tangential direction.

  However, in the above-described conventional configuration, the relative positions of the semiconductor laser 2, the objective lens 10, and the multi-segmented photodetector 3 are adjusted by moving the holder 8 holding the integrated unit 7 in the X-axis direction and the Y-axis direction. Therefore, it is necessary to secure the adjustment margin in advance. Particularly, the adjustment margin in the Y-axis direction directly increases the overall height of the optical head (the height in the thickness direction of the magneto-optical recording medium).

Since the stacking unit 7 is small, it is difficult to adjust the position of the stacking unit 7 alone, and it is necessary to adjust the position of the stacking unit 7 via the holder 8 that holds the stacking unit 7. For this reason, the thickness of the holder 8 in the Y-axis direction also increases the overall height of the optical head.

Therefore, as long as the relative positions of the semiconductor laser 2, the objective lens 10, and the multi-segmented photodetector 3 are adjusted in the conventional configuration, it is difficult to reduce the size and thickness of the optical head and the disk recording / reproducing apparatus. I was

In view of the above-described conventional problems, the present invention eliminates the holder 8 by directly fixing the integrated unit 7 to the optical bench 16 and eliminates the spherical sliding portion of the optical bench 16 and the base 14, An object of the present invention is to provide a method of manufacturing a disk recording / reproducing apparatus capable of realizing a small and thin disk recording / reproducing apparatus by greatly reducing the overall height of an optical head.

The present invention has the following configuration to achieve the above object.

That is, a method of manufacturing a disk recording / reproducing apparatus according to the first configuration of the present invention includes a light source, a light receiving element for receiving light reflected from a disc-shaped information recording medium, and condensing light on the disc-shaped information recording medium. An objective lens, an objective lens driving device that holds the objective lens and drives the objective lens in the focus and radial directions of the disc-shaped information recording medium, and an optical table that fixes the light source and the light receiving element. A method of manufacturing a disk recording / reproducing apparatus, comprising: fixing the light source and the light receiving element to the optical bench, and changing the objective lens driving device to the objective lens according to a signal amount detected by the light receiving element. After moving in a plane substantially orthogonal to the optical axis of the light beam incident on the optical table, the light beam is adhered to the optical bench, so that a desired detection signal is obtained by reflected light from the disc-shaped information recording medium. To obtain, and performs adjustment of a relative position of the light receiving element and the light source and the objective lens.

Further, the method of manufacturing a disk recording / reproducing apparatus according to the second configuration of the present invention includes a light source, a light receiving element for receiving reflected light from the disc-shaped information recording medium, and condensing light on the disc-shaped information recording medium. An objective lens, an objective lens driving device for holding the objective lens, and driving the objective lens in the focus and radial directions of the disc-shaped information recording medium, and a mirror positioned between the light source and the objective lens driving device And a light source, the light receiving element, and a method of manufacturing a disk recording and reproducing apparatus including an optical table for fixing the mirror, wherein the light source and the light receiving element are fixed to the optical table, After moving the mirror in a plane substantially perpendicular to the optical axis of the light beam incident on the objective lens according to the signal amount detected by the light receiving element, bonding the mirror to the optical bench. More, and performs desired for obtaining a detection signal, the relative positional adjustment of the the light source and the objective lens and the light receiving element mirror by the reflected light from the disk-like information recording medium.

  According to the present invention, the relative position adjustment and the optical axis adjustment between the semiconductor laser, the objective lens, and the light receiving element at the time of adjusting the focus error signal and the tracking error signal are performed in a plane substantially perpendicular to the optical axis incident on the objective lens. By realizing the planar adjustment of the objective lens, the height of the integrated unit in the height direction and the holder for holding the integrated unit become unnecessary, so that the optical head and the disk recording / reproducing apparatus can be reduced in size and thickness.

According to the first and second configurations, the relative position adjustment between the light source, the objective lens, and the light receiving element for obtaining a desired detection signal by the reflected light from the disc-shaped information recording medium is performed by the objective lens driving device and Since the movement is performed by moving the mirror as necessary, it is not necessary to move the integrated unit and adjust the position as in the related art. As a result, there is no need to secure a margin for adjusting the integrated unit in advance. Further, in the conventional apparatus, a holder for holding the stacking unit, which is necessary when adjusting the position of the stacking unit, becomes unnecessary. As a result, the overall height of the optical head can be reduced, and the optical head and the disk recording / reproducing apparatus can be reduced in size and thickness.

In the first and second configurations, the relative position adjustment by moving the objective lens driving device includes adjusting the position of the objective lens driving device in a plane substantially perpendicular to an optical axis incident on the objective lens. Is preferred. In particular, it is preferable to adjust the position of the objective lens driving device by moving the objective lens driving device in a radial direction and / or a tangential direction of the disc-shaped information recording medium. According to such a preferred configuration, relative position adjustment between the light source, the objective lens, and the light receiving element for obtaining a desired detection signal by the reflected light from the disc-shaped information recording medium can be easily performed.

In the first and second configurations, a skew adjustment of the objective lens driving device for further adjusting a relative angle between the disc-shaped information recording medium and the objective lens by moving the objective lens driving device. It is preferable that it is done. According to such a preferred configuration, when the relative position adjustment between the light source, the objective lens, and the light receiving element is performed by moving the objective lens driving device, the relative angle adjustment between the disc-shaped information recording medium and the objective lens can be performed at the same time. This eliminates the need for the conventional spherical tilt adjustment for adjusting the relative angle between the disc-shaped information recording medium and the objective lens. As a result, the structure can be simplified, and the device can be further reduced in size and thickness. Further, the relative adjustment between the light source / light receiving element, the objective lens driving device, and the disc-shaped information recording medium can be performed at once only by performing the plane adjustment and the rotation adjustment of the objective lens driving device. Can be simplified.

In the first and second configurations, it is preferable that the position of the objective lens driving device in the direction of the incident optical axis of the objective lens is further adjusted by moving the objective lens driving device. According to such a preferred configuration, since the offset of the focus error signal can be removed, it is possible to provide an optical head and a disk recording / reproducing apparatus capable of performing recording and reproduction with higher precision and lower power.

In the second configuration, it is preferable that the relative position adjustment by moving the mirror includes an angle adjustment of a reflection optical axis of the mirror. According to this preferred configuration, the amount of adjustment of the objective lens driving device in the radial direction and the tangential direction can be greatly reduced, so that the device can be further reduced in size and thickness.

Further, in the first and second configurations described above, the objective lens or the objective lens driving device may be configured such that the substantially central portion of the objective lens is a center of rotation and a plane substantially orthogonal to an optical axis incident on the objective lens. It is preferable to perform rotation adjustment. According to such a preferred configuration, the astigmatism of the light source and the astigmatism of the objective lens can be reduced by the in-plane rotation of the objective lens or the objective lens driving device, so that the recording / reproducing ability of the optical head is further improved. It is possible to improve the performance of the disk recording / reproducing apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

1, 2, 3, 4 and 5, 1 is a silicon substrate, 2 is a semiconductor laser fixed on the silicon substrate 1, 3 is a multi-segmented photodetector formed on the silicon substrate 1, 4 is a resin package, 5 is a hologram element (diffraction grating) molded of resin, 6 is a composite element composed of a beam splitter 6a, a folding mirror 6b, and a polarization splitting element 6c, 9 is a reflection mirror, 10 is an objective lens holder. An objective lens fixed to 11, an magneto-optical recording medium 12 having a magneto-optical effect, an objective lens driving device 13 for driving the objective lens in the focus and radial directions of the magneto-optical recording medium 12, and an objective lens driving device 13 , 16 is an optical table, 17 is a light spot for detecting a focus error signal formed on the multi-segment photodetector 3, and 18 is probably A light spot for tracking error signal detection formed on the photodetector 3, 19 is a main beam (P-polarized light) formed on the multi-segment photodetector 3, and 20 is formed on the multi-segment photodetector 3. Main beam (S-polarized light), 21 is a focus error light receiving area, 22 and 23 are tracking error light receiving areas, 24 is an information signal light receiving area, 25 is a subtractor, 26 is an adder, and 27 and 28 are focus error signal detection. , A reference hole 29, an adhesive 31, and a guide shaft 32.

The operation of the first embodiment of the present invention configured as described above will be described below.

(4) The light emitted from the semiconductor laser 2 is separated by the hologram element 5 into a plurality of different light beams. The plurality of different light beams pass through the beam splitter 6a of the composite element 6, are reflected by the reflection mirror 9, and are fixed on the objective lens holder 11 by the objective lens 10 to form a light spot 30 having a diameter of about 1 micron on the magneto-optical recording medium 12. As light.

{Circle around (4)} The light beam reflected by the beam splitter 6a of the composite element 6 is incident on a laser monitoring light receiving element (not shown) to control the driving current of the semiconductor laser 2.

(4) The reflected light from the magneto-optical recording medium 12 follows the reverse path, is reflected and separated by the beam splitter 6a of the composite device 6, and enters the return mirror 6b and the polarization separating device 6c.

The semiconductor laser 2 is installed so as to have a polarization direction parallel to the paper surface in FIG. 4 (A), and the incident light is rotated by 45 degrees by the polarization separation element 6c and two polarization components orthogonal to each other. The light is separated into light beams and enters the information signal light receiving region 24.

  Of the light reflected from the information recording medium 12, the light transmitted through the beam splitter 6a is split into a plurality of light by the diffraction grating 5 and condensed on the focus error signal light receiving area 21 and the tracking error signal light receiving areas 22 and 23.

Focus servo is performed by the so-called SSD method, and tracking servo is performed by the so-called push-pull method.

Furthermore, by calculating the difference between the main beam 19 composed of P-polarized light and the main beam 20 composed of S-polarized light, it is possible to detect a magneto-optical disk information signal by a differential detection method. Further, by taking the sum of them, it is possible to detect a pre-pit signal.

  The reflection mirror 9 is fixed to the optical bench 16. The integrated unit 7 is fitted and fixed to the optical bench 16. As a result, the size of the optical bench 16 is defined such that the position of the multi-segmented photodetector 3 in the Z′-axis direction (optical axis direction) is located substantially in the middle of the focal points 27 and 28 of the light spot. You.

In the present embodiment, relative position adjustment between the semiconductor laser 2, the objective lens 10, and the multi-segment photodetector 3 for obtaining a desired detection signal by reflected light from the magneto-optical recording medium is performed as follows.

The positioning hole 29 of the base 14 is held by a chucking pin (not shown) of the external jig, and the objective lens driving device 13 is moved in the X direction (radial direction) and in the plane substantially perpendicular to the optical axis incident on the objective lens. By moving in the Y direction (tangential direction), the output of the tracking error signal light receiving regions 22 and 23 is adjusted so as to be substantially uniform. After the adjustment, the base 14 is bonded and fixed to the optical bench 16 using the adhesive 31 in this state. Thus, the adjustment of the focus error signal and the tracking error signal is completed.

  At this time, the same effect can be obtained by fixing the base 14 to the optical base 16 in advance and fixing the objective lens driving device 13 to the base 14 after adjusting the objective lens driving device 13 in the X direction and the Y direction. Needless to say,

In adjusting the relative angle between the magneto-optical recording medium 12 and the objective lens at the same time as adjusting the objective lens driving device in a plane substantially perpendicular to the optical axis incident on the objective lens, The skew adjustment of the device 13 can be performed. That is, by rotating the external jig using the same jig as described above, the rotation of the objective lens driving device 13 is adjusted in the radial direction θR and the tangential direction θT.

As described above, according to the first embodiment, the holder is abolished by directly fixing the integrated unit 7 to the optical table 16, and the objective lens driving device 13 is moved in the radial direction (X direction) and the tangential direction ( By adjusting the movement in the Y direction), the focus error signal and the tracking error signal are adjusted. As a result, there is no need to adjust the height of the optical head in the height direction, and the thickness can be reduced by the thickness of the holder. Therefore, the total height of the optical head can be significantly reduced, and a small and thin optical head and a disk recording / reproducing apparatus can be realized.

Further, by performing skew adjustment of the objective lens driving device 13 for adjusting the relative angle between the magneto-optical recording medium 12 and the objective lens, the conventional adjustment by spherical tilt is unnecessary, and the structure can be simplified. The device can be further reduced in size and thickness. In addition, by performing the plane adjustment and the rotation adjustment of the objective lens driving device at the same time, the relative adjustment between the light source / light receiving element, the objective lens driving device, and the disc-shaped information recording medium is completed, so that the adjustment process can be simplified. .

(Embodiment 2)
Next, a second embodiment will be described with reference to FIG.

This embodiment is different from the first embodiment in that the adjustment of the base 14 in the Y direction (tangential direction) is realized by adjusting the reflection mirror 9 in the Z ′ direction.

  With this configuration, the amount of adjustment of the objective lens driving device 13 and the base 14 in the Y direction (tangential direction) can be greatly reduced, and the size of the optical head can be further reduced.

(Embodiment 3)
Next, a third embodiment will be described with reference to FIG.

The present embodiment is different from the first embodiment in that the base 14 is adjusted also in the Z direction (incident optical axis direction, height direction). With this configuration, it is possible to remove the offset of the focus error signal, and it is possible to perform recording and reproduction with higher precision and lower power.

(Embodiment 4)
Next, a fourth embodiment will be described with reference to FIG.

This embodiment is different from the first embodiment in that the adjustment of the base 14 in the X direction (radial direction) and the Y direction (tangential direction) is performed by adjusting the reflection surface angles θX and θY of the reflection mirror 9. It is to realize. At this time, the rotation center of the reflection surface angle adjustment is set to a substantially light emitting point of the semiconductor laser 2.

  With this configuration, the amount of adjustment of the objective lens driving device 13 in the radial and tangential directions can be significantly reduced, and the size of the optical head can be further reduced.

(Embodiment 5)
Next, a fifth embodiment will be described with reference to FIG.

This embodiment is different from the first embodiment in that the objective lens 10 or the objective lens driving device 13 or the base 14 is connected to the optical axis incident on the objective lens about the center of the objective lens 10 as the center of rotation. The point is that the rotation is adjusted in a plane that is substantially orthogonal.

  With this configuration, the astigmatism of the semiconductor laser 2 and the astigmatism of the objective lens 10 can be reduced by the in-plane rotation of the objective lens 10, so that the recording / reproducing ability of the optical head is further improved, and the disk recording is improved. The performance of the playback device can be improved.

FIG. 2 is an exploded perspective view showing a method of adjusting the objective lens driving device of the disk recording / reproducing device according to the first embodiment of the present invention. FIG. 1 is a perspective view schematically showing an overall configuration of an assembled state of a disk recording / reproducing apparatus according to a first embodiment of the present invention. FIG. 1 is an exploded perspective view schematically showing a configuration of a disk recording / reproducing apparatus according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an optical path of a disk recording / reproducing apparatus according to a first embodiment of the present invention, where (A) is a front view, and (B) is a view seen from the direction of an arrow along line II in (A). FIG. FIG. 2 is a schematic diagram showing a multi-segment photodetector and a signal detection circuit used in the disk recording / reproducing apparatus according to the first embodiment of the present invention. FIG. 9 is an exploded perspective view illustrating an adjustment method of an objective lens driving device and a reflection mirror of a disk recording / reproducing device according to a second embodiment of the present invention. FIG. 14 is an exploded perspective view showing a method of adjusting an objective lens driving device of a disk recording / reproducing device according to a third embodiment of the present invention. It is the schematic which showed the method of rotation adjustment of the reflection mirror of the disk recording / reproducing apparatus which concerns on the 4th Embodiment of this invention, (A) is a front view, (B) is the II-II line of (A). FIG. 4 is a cross-sectional view as viewed from the direction of the arrow. FIG. 21 is an exploded perspective view showing a method for adjusting the rotation of an objective lens of a disk recording / reproducing apparatus according to a fifth embodiment of the present invention. FIG. 10 is an exploded perspective view showing the outline of the configuration of a conventional disk recording / reproducing apparatus and an adjusting method. It is the schematic which showed the optical path of the conventional disk recording / reproducing apparatus, (A) is a front view, (B) is sectional drawing seen from the arrow direction of III-III line of (A). FIG. 2 is a schematic diagram showing a multi-segment photodetector and a signal detection circuit used in a conventional disk recording / reproducing apparatus. FIG. 11 is a schematic sectional view showing a skew adjustment mechanism of a conventional disk recording / reproducing apparatus.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 silicon substrate 2 semiconductor laser 3 multi-split photodetector 4 resin package 5 hologram element 6 composite element 6a beam splitter 6b folding mirror 6c polarization splitting element 7 integrated unit 8 holder 9 reflection mirror 10 objective lens 11 objective lens holder 12 magneto-optical recording Medium 13 Objective lens drive 14 Base 15 Tilt screw 16 Optical table 17 Light spot 18 Light spot 19 Main beam (P polarization)
20 Main beam (S polarization)
Reference Signs List 21 focus error signal light receiving area 22 tracking error signal light receiving area 23 tracking error signal light receiving area 24 information signal light receiving area 25 subtractor 26 adder 27 light spot focus 28 light spot focus 29 positioning hole 30 light spot 31 adhesive 32 guide axis

Claims (10)

A light source,
A light-receiving element for receiving reflected light from the disc-shaped information recording medium;
An objective lens for condensing light on the disc-shaped information recording medium,
An objective lens driving device that holds the objective lens and drives the objective lens in the focus and radial directions of the disc-shaped information recording medium;
An optical table for fixing the light source and the light receiving element.
In a state where the light source and the light receiving element are fixed to the optical bench, the objective lens driving device is driven in a plane substantially orthogonal to an optical axis of a light beam incident on the objective lens according to a signal amount detected by the light receiving element. Then, by adhering to the optical bench, relative position adjustment of the light source, the objective lens, and the light receiving element is performed to obtain a desired detection signal by reflected light from the disc-shaped information recording medium. A method for manufacturing a disk recording and reproducing apparatus. A light source,
A light-receiving element for receiving reflected light from the disc-shaped information recording medium;
An objective lens for condensing light on the disc-shaped information recording medium,
An objective lens driving device that holds the objective lens and drives the objective lens in the focus and radial directions of the disc-shaped information recording medium;
A mirror located between the light source and the objective lens driving device;
A method for manufacturing a disk recording / reproducing apparatus comprising: the light source, the light receiving element, and an optical table for fixing the mirror.
With the light source and the light receiving element fixed to the optical bench, the mirror was moved in a plane substantially orthogonal to the optical axis of the light beam incident on the objective lens according to the signal amount detected by the light receiving element. Thereafter, by adhering to the optical table, the relative positions of the light source, the objective lens, the light receiving element, and the mirror are adjusted to obtain a desired detection signal by reflected light from the disc-shaped information recording medium. A method for manufacturing a disk recording and reproducing apparatus. A light source,
A light-receiving element for receiving reflected light from the disc-shaped information recording medium;
An objective lens for condensing light on the disc-shaped information recording medium,
An objective lens driving device that holds the objective lens and drives the objective lens in the focus and radial directions of the disc-shaped information recording medium;
A mirror located between the light source and the objective lens driving device;
A method for manufacturing a disk recording / reproducing apparatus comprising: the light source, the light receiving element, and an optical table for fixing the mirror.
With the light source and the light receiving element fixed to the optical bench, the mirror is skew-adjusted in the radial direction and the tangential direction and / or translated in the optical axis direction according to the signal amount detected by the light receiving element. After that, by adhering to the optical table, relative position adjustment of the light source, the objective lens, the light receiving element, and the mirror to obtain a desired detection signal by reflected light from the disc-shaped information recording medium is performed. A method for manufacturing a disk recording / reproducing apparatus. The disk recording / reproducing apparatus according to any one of claims 1 to 3, wherein the relative position adjustment is performed so that detection signals detected in two tracking error signal light receiving areas of the light receiving element become substantially uniform. Device manufacturing method. 4. The method according to claim 1, wherein the light source and the light receiving element are integrated to form an integrated unit. 2. The method according to claim 1, wherein the objective lens driving device is moved in a radial direction and / or a tangential direction of the disc-shaped information recording medium. Further, after performing a skew adjustment of the objective lens driving device for adjusting a relative angle between the disc-shaped information recording medium and the objective lens, the objective lens driving device is bonded to the optical bench. The method for manufacturing a disk recording / reproducing apparatus according to claim 1. Further, after adjusting the position of the objective lens driving device in the direction of the incident optical axis of the objective lens, the objective lens driving device is bonded to the optical bench. The manufacturing method of the disk recording / reproducing apparatus according to the above. The rotation adjustment of the objective lens or the objective lens driving device is performed on a plane substantially orthogonal to an optical axis of a light beam incident on the objective lens, with a substantially central portion of the objective lens as a center of rotation. 4. The method for manufacturing a disk recording / reproducing device according to any one of 1 to 3. 4. The method according to claim 1, wherein the detection signal is a tracking error signal or a focus error signal.

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