JP5179332B2 - Lens position adjustment mechanism for optical pickup device, optical pickup device, optical disk device, and lens position adjustment method for optical pickup device - Google Patents

Description

  The present invention relates to a lens position adjustment mechanism of an optical pickup device, an optical pickup device, an optical disc device, and a lens position adjustment method of an optical pickup device provided in an optical disc device for recording or reproducing an optical disc. The present invention relates to lens position adjustment of a collimating lens in an optical pickup device.

  In recent years, development of a high-density optical disk apparatus using a semiconductor laser having a wavelength of 405 nm and an objective lens having a numerical aperture (NA) of 0.85 is in progress. The spherical aberration generated when the substrate thickness of the optical disk is different from the predetermined amount is proportional to the fourth power of the numerical aperture (NA). For this reason, in a high density optical disk apparatus using an objective lens having a large numerical aperture (NA), it is essential to correct spherical aberration in order to cope with a substrate thickness error of the optical disk.

  Therefore, in the optical pickup devices disclosed in Patent Document 1 and Patent Document 2 as conventional techniques, a collimator lens 103 is provided in the optical path between a light source 101 such as a semiconductor laser and an objective lens 102 as shown in FIG. . The collimating lens 103 is attached to a collimating lens position adjusting unit 104 that moves in the optical axis direction of the laser beam. The collimating lens position adjusting unit 104 is mounted at a predetermined position of the housing 105 and fixed with an adhesive. Has been.

Here, when the collimating lens position adjusting unit 104 is attached to the housing 105, the collimating lens position adjusting unit 104 is positioned by pressing the reference surface 104 a of the collimating lens position adjusting unit 104 against the reference surface 105 a of the housing 105. Therefore, the position of the collimating lens 103 is determined by the combined condition of the mold finishing accuracy of the housing 105, the mold accuracy of the collimating lens position adjusting unit 104, and the assembly accuracy.
JP 2006-252616 A (published September 21, 2006) JP 2006-252628 A (published September 21, 2006)

  However, in the above conventional optical pickup device, the collimating lens is moved according to the substrate thickness as the structure of the spherical aberration correcting device. However, when the collimating lens is moved, the assembling error of the spherical aberration correcting device and the spherical aberration correcting are corrected. There is a problem that the center of the collimating lens shifts with respect to the optical axis within the movable range of the collimating lens due to an assembly error when the apparatus is incorporated in the pickup.

  That is, in the optical pickup device having the collimating lens position adjusting unit, the collimating lens position adjusting device equipped with the collimating lens is attached to the mounting portion of the housing. In this case, it is difficult to make the center of the collimating lens come to the optical axis due to the accuracy variation when the collimating lens is bonded to the collimating lens position adjustment unit and the accuracy and assembly variation of the collimating lens position adjustment unit. is there.

  For example, in the optical pickup device disclosed in Patent Document 1, in order to cope with optical discs with different standards, a shielding plate with a different aperture diameter is switched or inserted into the objective lens 102 or a concave lens is additionally inserted. However, there is no disclosure of a technique for bringing the central portion of the collimating lens 103 to the optical axis.

  Further, in the optical pickup device disclosed in Patent Document 2, the collimating lens 103 is moved in a direction parallel to the optical axis so as to cope with optical disks of different standards. A technique for making the central portion of the collimating lens come to the optical axis is not disclosed.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to make the central portion of the lens come to the optical axis, so that the spherical aberration correction means is added to the optical pickup device. The lens position adjustment mechanism of the optical pickup device, the optical pickup device, the optical disc device, and the optical pickup device, which can improve the assembly accuracy when assembled, and can ensure high-performance recording / reproduction characteristics by increasing the accuracy of spherical aberration correction, and An object of the present invention is to provide a lens position adjusting method for an optical pickup device.

In order to solve the above problems, the lens position adjusting mechanism of the optical pickup device of the present invention is an optical pickup provided with spherical aberration correction means for correcting spherical aberration by moving the lens along the optical axis using a driving device. The lens position adjusting mechanism of the apparatus has a housing that is an apparatus housing for mounting the optical component including the lens, and the spherical aberration correcting means is mounted on a lens position adjusting unit that is attached and fixed to the housing. The lens position adjustment unit is disposed between the lens position adjustment unit and the housing on the surface of the housing when the lens position adjustment unit is positioned and fixed to the housing, and faces the lens position adjustment unit. A surface extending in the thickness direction of the housing, the objective lens of the optical pickup device Along the housing reference surface is a surface on a side and intervening member is brought into contact rotatably with the lens position adjustment unit is provided in parallel to a and the rotation center to slide, the interposed member, the lens position Consisting of a projection having an arcuate cross section formed on the adjustment unit, it is translated along the housing reference plane from the center of the lens in the thickness direction of the housing perpendicular to the sliding direction of the lens position adjustment unit. It is characterized by being formed at the position.

  According to the above invention, when positioning and fixing the lens position adjusting unit having the spherical aberration correcting means attached and fixed to a housing which is an apparatus housing on which an optical component including a lens is mounted, the following is performed. be able to.

  First, after the lens is moved along the optical axis to the housing reference plane side of the lens position adjusting unit by the driving device for the spherical aberration correcting means, the lens is adjusted so that the center position of the lens coincides with the optical axis. The position adjustment unit can be slid in parallel along the housing reference plane.

  Next, after the lens is moved along the optical axis to the side opposite to the housing reference surface side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, the center position of the lens is aligned with the optical axis. In order to match, the lens position adjusting unit can be rotated with the interposed member interposed between the lens position adjusting unit and the housing reference plane of the housing as the center of rotation.

  Thereby, the center of the lens of the spherical aberration correction means coincides with the optical axis. If the lens position adjustment unit is attached and fixed to the housing in this state, the center of the lens coincides with the optical axis.

Therefore, the central portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correction means is incorporated into the optical pickup device can be improved, and the accuracy of spherical aberration correction can be improved. It is possible to provide a lens position adjusting mechanism of an optical pickup device that can ensure high-performance recording / reproducing characteristics by increasing the height .

  In addition, the cross-sectionally arcuate protrusion means a protrusion in a state in which a cylinder is divided in the vertical direction.

In addition, with the above configuration , the interposition member is formed in the lens position adjustment unit, and the shape thereof is a protrusion having a cross-sectional arc shape, so that the lens position adjustment unit can easily slide in parallel along the housing reference plane. Yes. In addition, the lens position adjusting unit can be easily rotated along the cross-sectional arcuate projection, with the contact point between the cross-sectional arcuate projection and the housing reference surface as the center of rotation .

Further, with the above configuration , the interposition member coincides with the optical axis when projected in the sliding direction of the lens position adjusting unit, and is light in the thickness direction of the housing, which is orthogonal to the sliding direction of the lens position adjusting unit. There will be some deviation from the axis.

  That is, light is shielded when the intervening member is present at a position that coincides with the optical axis. However, in the present invention, light shielding is avoided by providing the intervening member at a position translated in the thickness direction of the housing. be able to.

Further, the position where the interposition member is provided is desirably a position near the distance because the adjustment stroke increases if it is too far from the optical axis. In this regard, in the present invention, interposed member, orthogonal to the sliding direction of the lens position adjustment unit, in a thickness direction of the housing are formed on the moved position parallel. In general, the thickness direction of the housing is shorter than the length direction of the housing reference surface. Therefore, the above requirements can be satisfied.

The lens position adjusting mechanism of the optical pickup device of the present invention is a lens position adjusting mechanism of an optical pickup device provided with spherical aberration correcting means for correcting spherical aberration by moving the lens along the optical axis using a driving device. The spherical aberration correction means is mounted on a lens position adjustment unit that is mounted and fixed to the housing, and the lens position adjustment unit. When the lens position adjusting unit is positioned and fixed on the housing, the lens position adjusting unit is slid in parallel along the housing reference plane of the housing and becomes the center of rotation. An interposition member that rotatably contacts the lens position adjustment unit is provided. , It has become a protrusion cross-section arcuate formed in the housing reference surface, characterized by being formed in perpendicular to the sliding direction of the lens position adjusting unit, and moves parallel to the thickness direction of the housing position It is said.

According to the above invention, when positioning and fixing the lens position adjusting unit having the spherical aberration correcting means attached and fixed to a housing which is an apparatus housing on which an optical component including a lens is mounted, the following is performed. be able to.

First, after the lens is moved along the optical axis to the housing reference plane side of the lens position adjusting unit by the driving device for the spherical aberration correcting means, the lens is adjusted so that the center position of the lens coincides with the optical axis. The position adjustment unit can be slid in parallel along the housing reference plane.

Next, after the lens is moved along the optical axis to the side opposite to the housing reference surface side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, the center position of the lens is aligned with the optical axis. In order to match, the lens position adjusting unit can be rotated with the interposed member interposed between the lens position adjusting unit and the housing reference plane of the housing as the center of rotation.

Thereby, the center of the lens of the spherical aberration correction means coincides with the optical axis. If the lens position adjustment unit is attached and fixed to the housing in this state, the center of the lens coincides with the optical axis.

Therefore, the central portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correction means is incorporated into the optical pickup device can be improved, and the accuracy of spherical aberration correction can be improved. It is possible to provide a lens position adjusting mechanism of an optical pickup device that can ensure high-performance recording / reproducing characteristics by increasing the height.

  In addition, the cross-sectionally arcuate protrusion means a protrusion in a state in which a cylinder is divided in the vertical direction.

Further, with the above configuration , the interposition member is formed on the housing reference surface, and the shape thereof is a projection having a cross-sectional arc shape, so that the lens position adjustment unit can be easily slid in parallel along the housing reference surface. In addition, the lens position adjustment unit can be easily rotated along the cross-sectional arcuate projection with the contact point between the cross-sectional arcuate projection and the housing reference surface as the rotation center .

Further, with the above configuration, the interposition member coincides with the optical axis when projected in the sliding direction of the lens position adjusting unit, and is light in the thickness direction of the housing, which is orthogonal to the sliding direction of the lens position adjusting unit. There will be some deviation from the axis.

That is, light is shielded when the intervening member is present at a position that coincides with the optical axis. However, in the present invention, light shielding is avoided by providing the intervening member at a position translated in the thickness direction of the housing. be able to.

Further, the position where the interposition member is provided is desirably a position near the distance because the adjustment stroke increases if it is too far from the optical axis. In this regard, in the present invention, the interposition member is formed at a position that is parallel to the sliding direction of the lens position adjusting unit and that is translated in the thickness direction of the housing. In general, the thickness direction of the housing is shorter than the length direction of the housing reference surface. Therefore, the above requirements can be satisfied.

The lens position adjusting mechanism of the optical pickup device of the present invention, in the central portion of the lens, it is preferable that adjustment marks for viewing is provided.

  Thereby, since the adjustment mark for visual recognition is provided in the center part of the lens, the center position of the lens can be determined by the adjustment mark for visual recognition. Therefore, when adjusting the lens position, the lens position adjustment unit is slid on the housing reference surface so that the visual adjustment mark provided at the center of the lens coincides with the optical axis, and the interposition member is centered. Can be rotated.

  Therefore, the center portion of the lens can be easily placed on the optical axis by the visual adjustment mark.

The lens position adjusting mechanism of the optical pickup device of the present invention, together with the lens is a collimating lens, the adjustment mark for the visual recognition is preferably made of concave or convex portions formed on the lens surface.

  As a result, the collimating lens has a function of making the divergent light beam emitted from the light source into a parallel light beam and making it incident on the objective lens. For example, it can be said to be a lens that corrects spherical aberration based on the thickness of the optical disk.

  Further, by forming a concave or convex portion at the center position of the lens surface of the collimating lens, the concave or convex portion can function as a visual adjustment mark without shielding light at the central position of the lens surface. .

A lens position adjusting mechanism of the optical pickup device of the present invention, the side wall of the housing to launch a position intersecting an extension of the optical axis passing through the collimator lens, the through-hole around the optical axis is provided Is preferred.

  Thereby, it is possible to easily check whether the center position of the collimating lens coincides with the optical axis through the through hole from the outside of the housing.

  In order to solve the above problems, an optical pickup device of the present invention is characterized by including the lens position adjusting mechanism of the above-described optical pickup device.

  According to the above invention, the center portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correcting means is incorporated into the optical pickup device can be improved. By increasing the accuracy of aberration correction, it is possible to provide an optical pickup device that can ensure high-performance recording / reproducing characteristics.

  In order to solve the above-described problems, an optical disk apparatus according to the present invention is an optical disk apparatus provided with the above-described optical pickup device, which emits laser light from a semiconductor laser and records information on the optical disk using the laser light. Or information recorded on the optical disk is reproduced.

  According to the above invention, the center portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correcting means is incorporated into the optical pickup device can be improved. It is possible to provide an optical disc apparatus capable of ensuring high-performance recording / reproducing characteristics by increasing the accuracy of aberration correction.

The lens position adjusting method for an optical pickup device of the present invention is a lens position adjusting method for an optical pickup device provided with spherical aberration correction means for correcting spherical aberration by moving a collimating lens along the optical axis using a driving device. When the lens position adjustment unit with the spherical aberration correcting means attached and fixed is positioned and fixed to a housing which is an apparatus housing on which the optical component including the collimating lens is mounted, the collimating lens is corrected with the spherical aberration. The surface of the lens position adjustment unit that extends in the thickness direction of the housing facing the lens position adjustment unit along the optical axis in the driving device of the means, and is the surface on the objective lens side of the optical pickup device After moving to the housing reference plane side, it intersects with the extension of the optical axis passing through the collimating lens. The lens position is adjusted so that the visual adjustment mark provided at the center position of the collimating lens coincides with the optical axis while checking through a through-hole centered on the optical axis provided on the side wall of the housing rising to the position. a first step of parallel slide along the unit in the housing reference surface, after the completion of the first step, the lens position adjusting the collimating lens along the optical axis by the driving device of the spherical aberration correction means after moving to the opposite to the housing reference plane side of the unit, so while checking through the through hole adjusting marks for viewing provided in the center position of the collimator lens coincides with the optical axis, the lens the position adjustment unit, interposed between the housing reference surface of the lens position adjustment unit and the housing, formed in the lens position adjustment unit The has become a cross section arcuate projections, perpendicular to the sliding direction of the lens position adjustment unit, a position shifted in parallel along the housing reference surface from the central portion in the thickness direction of the housing of the collimator lens The method includes a second step of rotating the formed interposed member as a rotation center, and a third step of attaching and fixing the lens position adjusting unit to the housing after the second step.

  According to the above invention, when positioning and fixing the lens position adjustment unit having the spherical aberration correcting means attached and fixed to a housing which is an apparatus housing on which the optical component including the collimating lens is mounted, In one step, after the collimating lens is moved along the optical axis to the housing reference plane side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, an extension line of the optical axis passing through the collimating lens; The lens position is adjusted so that the visual adjustment mark provided at the center position of the collimating lens coincides with the optical axis while checking through a through-hole centered on the optical axis provided on the side wall of the housing rising to the intersecting position. Slide the adjustment unit in parallel along the housing reference plane.

  Next, in the second step, the collimating lens is moved along the optical axis to the opposite side of the housing reference surface side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, and then passed through the through hole. The lens position adjustment unit is interposed between the lens position adjustment unit and the housing reference surface of the housing so that the visual adjustment mark provided at the center position of the collimating lens coincides with the optical axis while checking. The interposed member is rotated about the rotation center.

  As a result, the center of the lens coincides with the optical axis. If the lens position adjustment unit is attached and fixed to the housing in this state, the center of the lens coincides with the optical axis.

  Therefore, the central portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correction means is incorporated into the optical pickup device can be improved, and the accuracy of spherical aberration correction can be improved. Thus, it is possible to provide a lens position adjustment method for an optical pickup device that can ensure high-performance recording / reproduction characteristics.

In addition, the cross-sectionally arcuate protrusion means a protrusion in a state in which a cylinder is divided in the vertical direction.

In addition, with the above configuration, the interposition member is formed in the lens position adjustment unit, and the shape thereof is a protrusion having a cross-sectional arc shape, so that the lens position adjustment unit can be easily slid in parallel along the housing reference plane. Yes. In addition, the lens position adjusting unit can be easily rotated along the cross-sectional arcuate projection, with the contact point between the cross-sectional arcuate projection and the housing reference surface as the center of rotation.

Further, with the above configuration, the interposition member coincides with the optical axis when projected in the sliding direction of the lens position adjusting unit, and is light in the thickness direction of the housing, which is orthogonal to the sliding direction of the lens position adjusting unit. There will be some deviation from the axis.

That is, light is shielded when the intervening member is present at a position that coincides with the optical axis. However, in the present invention, light shielding is avoided by providing the intervening member at a position translated in the thickness direction of the housing. be able to.

Further, the position where the interposition member is provided is desirably a position near the distance because the adjustment stroke increases if it is too far from the optical axis. In this regard, in the present invention, the interposition member is formed at a position that is parallel to the sliding direction of the lens position adjusting unit and that is translated in the thickness direction of the housing. In general, the thickness direction of the housing is shorter than the length direction of the housing reference surface. Therefore, the above requirements can be satisfied.

The lens position adjusting method for an optical pickup device of the present invention is a lens position adjusting method for an optical pickup device provided with spherical aberration correction means for correcting spherical aberration by moving a collimating lens along the optical axis using a driving device. When the lens position adjustment unit with the spherical aberration correcting means attached and fixed is positioned and fixed to a housing which is an apparatus housing on which the optical component including the collimating lens is mounted, the collimating lens is corrected with the spherical aberration. After being moved to the housing reference plane side of the lens position adjusting unit along the optical axis by the driving device of the means, it is provided on the side wall of the housing that rises to a position that intersects with the extension line of the optical axis passing through the collimating lens. It is installed at the center of the collimating lens while checking through the through hole centered on the optical axis. A first step of sliding the lens position adjustment unit in parallel along the housing reference plane so that the visual adjustment mark coincides with the optical axis, and after the first step, the collimating lens is moved to the spherical surface. After moving the lens position adjustment unit to the side opposite to the housing reference surface side along the optical axis by the driving device of the aberration correction means, the lens is provided at the center position of the collimating lens while checking through the through hole. A lens position adjustment unit is interposed between the lens position adjustment unit and the housing reference surface of the housing so that the visual adjustment mark coincides with the optical axis, and has a cross-sectional arc shape formed on the housing reference surface. It is formed of a protrusion, and is formed at a position parallel to the sliding direction of the lens position adjusting unit and translated in the thickness direction of the housing. A second step of rotating the stationary member as the center of rotation, after the end of the second step, is characterized in that it comprises a third step of fixing the attachment of the lens position adjusting unit to the housing.

According to the above invention, when positioning and fixing the lens position adjustment unit having the spherical aberration correcting means attached and fixed to a housing which is an apparatus housing on which the optical component including the collimating lens is mounted, In one step, after the collimating lens is moved along the optical axis to the housing reference plane side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, an extension line of the optical axis passing through the collimating lens; The lens position is adjusted so that the visual adjustment mark provided at the center position of the collimating lens coincides with the optical axis while checking through a through-hole centered on the optical axis provided on the side wall of the housing rising to the intersecting position. Slide the adjustment unit in parallel along the housing reference plane.

Next, in the second step, the collimating lens is moved along the optical axis to the opposite side of the housing reference surface side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, and then passed through the through hole. The lens position adjustment unit is interposed between the lens position adjustment unit and the housing reference surface of the housing so that the visual adjustment mark provided at the center position of the collimating lens coincides with the optical axis while checking. The interposed member is rotated about the rotation center.

As a result, the center of the lens coincides with the optical axis. If the lens position adjustment unit is attached and fixed to the housing in this state, the center of the lens coincides with the optical axis.

Therefore, the central portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correction means is incorporated into the optical pickup device can be improved, and the accuracy of spherical aberration correction can be improved. Thus, it is possible to provide a lens position adjustment method for an optical pickup device that can ensure high-performance recording / reproduction characteristics.

In addition, the cross-sectionally arcuate protrusion means a protrusion in a state in which a cylinder is divided in the vertical direction.

Further, with the above configuration, the interposition member is formed on the housing reference surface, and the shape thereof is a projection having a cross-sectional arc shape, so that the lens position adjustment unit can be easily slid in parallel along the housing reference surface. In addition, the lens position adjustment unit can be easily rotated along the cross-sectional arcuate projection with the contact point between the cross-sectional arcuate projection and the housing reference surface as the rotation center.

Further, with the above configuration, the interposition member coincides with the optical axis when projected in the sliding direction of the lens position adjusting unit, and is light in the thickness direction of the housing, which is orthogonal to the sliding direction of the lens position adjusting unit. There will be some deviation from the axis.

That is, light is shielded when the intervening member is present at a position that coincides with the optical axis. However, in the present invention, light shielding is avoided by providing the intervening member at a position translated in the thickness direction of the housing. be able to.

Further, the position where the interposition member is provided is desirably a position near the distance because the adjustment stroke increases if it is too far from the optical axis. In this regard, in the present invention, the interposition member is formed at a position that is parallel to the sliding direction of the lens position adjusting unit and that is translated in the thickness direction of the housing. In general, the thickness direction of the housing is shorter than the length direction of the housing reference surface. Therefore, the above requirements can be satisfied.

As described above, the lens position adjusting mechanism of the optical pickup device of the present invention has a housing that serves as a device housing for mounting an optical component including a lens, and the spherical aberration correcting means is fixedly attached to the housing. it is mounted on the lens position adjustment unit, between the lens position adjustment unit and the housing, the lens position adjusting unit when the mounting positioning and fixing the lens position adjusting unit to the housing was in terms of the housing Then, it is a surface extending in the thickness direction of the housing facing the lens position adjusting unit, and is slid in parallel along the housing reference surface, which is the surface on the objective lens side of the optical pickup device, and becomes the center of rotation. And an interposition member that rotatably contacts the lens position adjusting unit is provided. Material is adapted from the lens position adjusting unit formed cross-section arcuate projections, perpendicular to the sliding direction of the lens position adjusting unit, the housing reference from a central portion in the thickness direction of the housing of the lens It is formed at a position translated along the surface .

Further, the lens position adjusting mechanism of the optical pickup device of the present invention has a housing as an apparatus housing for mounting optical components including a lens as described above, and the spherical aberration correcting means is fixedly attached to the housing. The lens position adjusting unit is mounted between the lens position adjusting unit and the housing when the lens position adjusting unit is positioned and fixed to the housing. An interposition member is provided that slides in parallel along the reference plane and rotatably contacts the lens position adjustment unit as a center of rotation. The interposition member is a cross section formed on the housing reference plane. The housing, which is formed of an arcuate protrusion and is orthogonal to the sliding direction of the lens position adjusting unit. Are those formed in the moved position parallel to the thickness direction of the grayed.

  Further, as described above, the optical pickup device of the present invention includes the lens position adjusting mechanism of the optical pickup device described above.

  Furthermore, as described above, the optical disk apparatus of the present invention is an optical disk apparatus provided with the above-described optical pickup device, which emits laser light from a semiconductor laser and records information on the optical disk using the laser light. Or the information recorded on the optical disk is reproduced.

As described above , the lens position adjustment method of the optical pickup device according to the present invention includes a lens position adjustment unit in which the spherical aberration correction unit is attached and fixed to a housing serving as a device housing on which an optical component including the collimating lens is mounted. When positioning and fixing, the collimating lens spreads in the thickness direction of the housing of the lens position adjusting unit facing the lens position adjusting unit along the optical axis by the driving device of the spherical aberration correcting means. The surface of the optical pickup device is provided on the side wall of the housing that rises to a position intersecting with the extension line of the optical axis passing through the collimating lens after being moved to the housing reference surface side that is the surface on the objective lens side of the optical pickup device . A view provided at the center of the collimating lens while checking through a through hole centered on the optical axis. A first step of adjusting mark use is parallel to slide the lens position adjusting unit along the housing reference plane to coincide with the optical axis, after completion of the first step, the spherical aberration of the collimator lens after moving to the opposite side along the optical axis by the driving device of the correcting means and the housing reference plane side of the lens position adjustment unit, provided at the center position of the collimator lens while confirming through the through hole as adjustment marks for viewing coincides with the optical axis, the lens position adjustment unit, interposed between the housing reference surface of the lens position adjustment unit and the housing, formed in the lens position adjustment unit section The housing is formed from an arcuate protrusion and is perpendicular to the sliding direction of the lens position adjusting unit from the center of the collimating lens. A second step of rotating the interposed member in the thickness direction that is formed in a position shifted in parallel along the housing reference plane as the center of rotation, after the end of the second step, the fixed attachment of the lens position adjusting unit to the housing And a third step.

In addition, as described above, the lens position adjusting method of the optical pickup device according to the present invention includes a lens position adjusting unit in which the spherical aberration correcting means is attached and fixed to a housing serving as a device housing on which an optical component including a collimating lens is mounted. When the lens is positioned and fixed, the collimating lens is moved to the housing reference plane side of the lens position adjusting unit along the optical axis by the driving device of the spherical aberration correcting means, and then passes through the collimating lens. The visual adjustment mark provided at the center of the collimator lens matches the optical axis while checking through a through-hole centered on the optical axis provided on the side wall of the housing that rises at a position that intersects with the extension of the optical axis. A first step of sliding the lens position adjustment unit in parallel along the housing reference plane, and the first step. After the above, the collimating lens is moved along the optical axis to the opposite side of the housing reference surface side of the lens position adjusting unit by the driving device of the spherical aberration correcting means, and then confirmed through the through hole. A lens position adjustment unit is interposed between the lens position adjustment unit and the housing reference surface of the housing so that a visual adjustment mark provided at the center position of the collimator lens coincides with the optical axis. The center of rotation is an interposition member formed at a position parallel to the thickness direction of the housing, which is formed by a projection having an arcuate cross section formed on the housing reference surface and orthogonal to the sliding direction of the lens position adjusting unit. And a second step of rotating and fixing the lens position adjusting unit to the housing after completion of the second step. It is a method that includes a degree.

  Therefore, the central portion of the lens can be located on the optical axis, and as a result, the assembly accuracy when the spherical aberration correction means is incorporated into the optical pickup device can be improved. As a result, it is possible to provide a lens position adjustment mechanism for an optical pickup device, an optical pickup device, an optical disk device, and a lens position adjustment method for the optical pickup device that can ensure high-performance recording / reproduction characteristics.

[Embodiment 1]
An embodiment of the present invention will be described with reference to FIGS. 1 to 7 as follows.

  As shown in FIGS. 2A and 2B, the optical pickup device 1 of the present embodiment emits laser light from a semiconductor laser 11 and records information on an optical disk (not shown) using the laser light. It is provided in an optical disk device that reproduces information recorded on the disk.

  The optical pickup device 1 includes a housing 10 that is a device housing. The housing 10 includes a semiconductor laser 11, a beam splitter 12, a reflecting mirror 13, a collimating lens 14 as a lens, a prism 15, and a rising surface. A mirror 16, a light receiving element 17, and a collimating lens position adjusting unit 20 are mounted.

  The beam splitter 12, the reflection mirror 13, the collimator lens 14, the prism 15, and the rising mirror 16 constitute optical components of the optical pickup device 1.

  In the optical pickup device 1, the laser light emitted from the semiconductor laser 11 passes through a beam splitter 12, a reflection mirror 13, a collimating lens 14, and a prism 15 that are optical components mounted on a housing 10 that is a device housing. Then, the light enters the rising mirror 16. Then, after the light beam is bent upward by the rising mirror 16, the laser light is irradiated to either a recording layer or a reproducing layer provided on an optical disk (not shown) through an objective lens (not shown).

  Reflected light from the recording layer or reproducing layer of the optical disc passes through the objective lens (not shown), returns to the beam splitter 12 through the rising mirror 16, the prism 15, the collimator lens 14, and the reflecting mirror 13, and branches at the beam splitter 12. And is incident on the light receiving element 17.

  The optical disk apparatus according to the present embodiment can use both a laser beam with a wavelength of 660 nm of the DVD standard and a laser beam with a wavelength of 405 nm of the Blu-ray standard. Therefore, the collimator lens 14 is moved in a direction parallel to the optical axis so that it can cope with any of the DVD standard optical disc and the Blu-ray standard optical disc. The distance between the lens 14 and the objective lens is changed. As a result, the occurrence of chromatic aberration is prevented, and various optical discs with different standards can be handled.

  In the present embodiment, the collimating lens 14 is attached to a collimating lens position adjusting unit 20 that is a drive unit attached to the housing 10. In order to ensure good optical pickup recording / reproducing characteristics of the collimating lens 14, the central portion of the collimating lens 14 needs to be positioned on the optical axis.

  Therefore, the optical pickup device 1 of the present embodiment has the following structure so that the central portion of the collimating lens 14 is positioned on the optical axis emitted from the semiconductor laser 11.

  That is, in the optical pickup device 1 of the present embodiment, as shown in FIG. 3, a visual adjustment mark 14a is provided at the center of the collimating lens 14, and as shown in FIGS. 2 (a) and 2 (b). Further, a through hole 10a centered on the optical axis is formed on a side wall surface as a secondary side wall of the housing 10 which rises at a position intersecting with an extension line of the optical axis in the laser light of the semiconductor laser 11 passing through the collimating lens 14. Is provided. And the adjustment mark 14a for visual recognition provided in the collimating lens 14 can be faced from the exterior of the housing 10 through the through-hole 10a, and thereby the center part of the collimating lens 14 can be aligned with the optical axis.

  Here, the collimating lens 14 according to the present embodiment has a concave portion at the center of the lens as an adjustment mark 14a for visual recognition of the collimating lens 14. The adjustment mark 14a is not necessarily limited to the concave portion, and a convex portion may be provided. The visual adjustment mark 14a (concave or convex) has no optical influence and can be discriminated by, for example, a CCD camera.

  The collimating lens 14 provided with the adjustment mark 14a for visually recognizing the concave portion or the convex portion is attached to a lens holder 21 as a spherical aberration correcting means of the collimating lens position adjusting unit 20, as shown in FIGS. Bonded and fixed. Further, when the collimating lens position adjusting unit 20 is attached to the housing 10, as shown in FIG. 2A, the collimating lens position adjusting unit is a component that is bonded and fixed to the housing 10 after adjusting the position of the collimating lens 14. 20 has a base holder 22.

  In the present embodiment, as shown in FIG. 4A, the base holder 22 has, for example, a semicircular cross section (hereinafter, the semicircular cross section indicates a vertically divided shape of a cylinder), that is, an arcuate cross section. A protrusion 23a is provided as an interposed member.

  Here, as shown in FIGS. 2A and 2B, when the center portion of the collimating lens 14 is aligned through the through hole 10 a of the housing 10, the projection 23 a having a semicircular cross section provided on the base holder 22 is formed. The position is adjusted by pressing against the housing reference surface 10b. The adjustment procedure of the collimating lens position adjustment unit 20 is as follows.

  First, as shown in FIG. 1A, in the base holder 22, the lens holder 21 to which the collimating lens 14 is fixed is moved to the end of the base holder 22 on the side of the projection 23a having a semicircular cross section. Then, the collimating lens position adjusting unit 20 is adjusted in the X direction through the through hole 10a of the housing 10 so that the central portion of the collimating lens 14 is aligned.

  Next, as shown in FIG. 1B, inside the base holder 22, the lens holder 21 to which the collimating lens 14 is fixed is attached to the end of the base holder 22 opposite to the reflecting mirror 13 side, that is, the housing reference surface 10 b. And the adjustment mark 14a at the center of the collimating lens is confirmed through the through hole 10a of the housing 10. At this time, if the lens center of the collimating lens 14 is deviated, the collimating lens position adjustment is performed with the contact portion between the semicircular projection 23a of the base holder 22 and the housing reference surface 10b of the housing 10 as the rotation center. The unit 20 is rotated along the cylindrical surface so that the central portion of the collimating lens 14 is aligned with the optical axis.

  Here, since the protrusion 23a has a cylindrical shape, the direction of rotation adjustment is limited to the rotation direction θx parallel to the X axis. However, since the contact area is large, adjustment is easy and accuracy is improved.

  As described above, the center of the collimator lens 14 is aligned with the optical axis at both ends of the movable range in the direction along the optical axis of the collimator lens 14 inside the base holder 22, and then the collimator lens position adjusting unit 20 is adjusted. Adhering and fixing to the housing 10. In the present embodiment, since the protrusion 23a is cylindrical, the fixing strength is also increased.

  In addition, this invention is not limited to said embodiment, A various change is possible within the scope of the present invention. For example, in the above-described embodiment, the protrusion 23a has a semicircular cross section. However, the present invention is not particularly limited to this, and it may be a spherical protrusion.

  Specifically, as shown in FIGS. 5A, 5B, and 5C, the shape of the contact portion of the base holder 22 of the collimator lens position adjusting unit 20 with the housing reference surface 10b of the housing 10 is spherical ( Hereinafter, the spherical shape indicates a protrusion 23b as an interposed member formed in a shape cut out from a sphere). As a result, when the center portion of the collimating lens 14 is aligned with the optical axis, the collimating lens position adjusting unit 20 is set to the X axis with the contact portion between the spherical projection 23b and the housing reference surface 10b of the housing 10 as the rotation center. It is possible to adjust in all directions of the rotation direction θx perpendicular to the direction and the rotation direction θy perpendicular to the Y-axis direction. In addition, adjustment is possible not only in the X-axis direction and the Y-axis direction but also in any direction. That is, in the semi-cylindrical shape, the rotation direction θy perpendicular to the Y-axis direction is not possible.

  Thus, after aligning the center part of the collimating lens 14 with the optical axis, the space between the housing reference surface 10b of the housing 10 and the base holder 22 is filled with an adhesive, whereby the collimating lens position adjusting unit 20 is adjusted. The housing 10 is bonded and fixed.

  Here, in the present embodiment, as shown in FIGS. 6A, 6B, and 6C, a driving device that drives the lens holder 21 provided inside the collimating lens position adjusting unit 20 along the optical axis. For example, a stepping motor 24a is used.

  A photo interrupter 25 is mounted as means for counting the number of steps of the stepping motor 24 and detecting the lens position of the collimating lens 14.

  Thereby, the collimating lens 14 can be moved by driving the lens holder 21 provided inside the collimating lens position adjusting unit 20.

  Incidentally, the driving device in the lens holder 21 provided in the collimating lens position adjusting unit 20 is not necessarily limited to the stepping motor 24a, but as shown in FIGS. 7A, 7B and 7C, the piezoelectric element 24b. Can be used.

  In this structure, a permanent magnet 26 is attached to the lens holder 21, and the position of the lens holder 21, that is, the position of the collimating lens 14 can be controlled by detecting a change in the magnetic field by the Hall element 27. become.

  Further, as a driving device for the lens holder 21 provided in the collimating lens position adjustment unit 20, for example, a DC motor (not shown) can be used. Also in this configuration, for example, the photo interrupter 25 is used to detect the collimating lens position.

  As described above, the collimating lens position adjustment unit 20 of the optical pickup device 1 according to the present embodiment corrects spherical aberration by moving the collimating lens 14 along the optical axis using a driving device such as a stepping motor 24a. A holder 21 is provided. The lens holder 21 is mounted on a collimating lens position adjusting unit 20 that is attached and fixed to the housing 10. The collimating lens position adjusting unit 20 is mounted on the housing 10 between the collimating lens position adjusting unit 20 and the housing 10. When positioning and fixing, the collimating lens position adjusting unit 20 is slid in parallel along the housing reference surface 10b of the housing 10, and the collimating lens position adjusting unit 20 is brought into contact with the collimating lens position adjusting unit 20 so as to be rotatable. Projections 23a and 23b are provided as members.

  According to the above configuration, when positioning and fixing the collimating lens position adjusting unit 20 with the lens holder 21 attached and fixed to the housing 10 serving as an apparatus housing on which the optical component including the collimating lens 14 is mounted, the following is performed. Can be.

  First, after the collimating lens 14 is moved along the optical axis toward the housing reference surface 10b side of the collimating lens position adjusting unit 20 by a driving device such as a stepping motor 24a of the lens holder 21, the central position of the collimating lens 14 is light. The collimating lens position adjusting unit 20 can be slid in parallel along the housing reference surface 10b so as to coincide with the axis.

  Next, the collimating lens 14 is moved along the optical axis to the opposite side of the housing reference surface 10b side of the collimating lens position adjusting unit 20 by a driving device such as a stepping motor 24a of the lens holder 21, and then the collimating lens 14 Projections 23a and 23b as interposing members interposed between the collimating lens position adjusting unit 20 and the housing reference surface 10b of the housing 10 so that the center position of the collimating lens is aligned with the optical axis. It can be rotated as the center of rotation.

  As a result, the center of the collimating lens 14 of the lens holder 21 coincides with the optical axis. If the collimating lens position adjusting unit 20 is attached and fixed to the housing 10 in this state, the center of the collimating lens 14 coincides with the optical axis.

  Accordingly, the central portion of the collimating lens 14 can be located on the optical axis, and as a result, the assembly accuracy when the lens holder 21 is incorporated into the optical pickup device 1 including the assembly accuracy of the lens holder 21 itself is improved. It is possible to provide a lens position adjusting mechanism of the optical pickup device 1 that can ensure high-performance recording / reproducing characteristics by increasing the accuracy of spherical aberration correction.

  In the present embodiment, the projections 23a and 23b as the interposing members are provided in the collimating lens position adjusting unit 20, but in the present invention, the interposing members are the collimating lens position adjusting unit 20 and the housing. The collimating lens position adjusting unit 20 is provided between the collimating lens 14 and the collimating lens 14 so that the center position of the collimating lens 14 coincides with the optical axis. It is sufficient if the position adjustment unit 20 can be rotated about the interposed member as a rotation center. Therefore, the interposition member is not formed on the collimating lens position adjustment unit 20 or the housing reference surface 10b, but may be an intervening member. Further, the shape of the interposed member may be, for example, a rod having a circular cross section or a triangle.

  Further, in the lens position adjustment mechanism of the optical pickup device 1 of the present embodiment, the interposition member can be composed of a projection 23a having a cross-sectional arc shape formed on the collimator lens position adjustment unit 20. In addition, the cross-sectionally arcuate protrusion means a protrusion in a state in which a cylinder is divided in the vertical direction.

  As a result, the protrusion 23a is formed on the collimating lens position adjusting unit 20, and the shape thereof is the protrusion 23a having a cross-sectional arc shape, so that the collimating lens position adjusting unit 20 can easily slide in parallel along the housing reference surface 10b. Can In addition, the collimating lens position adjusting unit 20 can be easily rotated along the cross-sectional arcuate projection 23a with the contact point between the cross-sectional arcuate projection 23a and the housing reference surface 10b as the rotation center.

  Further, in the lens position adjusting mechanism of the optical pickup device 1 of the present embodiment, the interposition member can be composed of a spherical protrusion 23 b formed on the collimating lens position adjusting unit 20. In addition, the spherical protrusion 23b refers to the protrusion 23b in a state where a sphere is cut out.

  Thus, the protrusion 23b is formed on the collimating lens position adjusting unit 20, and the shape of the protrusion 23b is a spherical protrusion 23b, so that the collimating lens position adjusting unit 20 can easily slide in parallel along the housing reference surface 10b. The collimating lens position adjusting unit 20 can be easily rotated along the spherical protrusion, with the contact point between the spherical protrusion 23b and the housing reference surface 10b as the rotation center.

  In this case, since the protrusion 23b has a spherical shape, the rotation direction is, for example, not only the rotation in the plane perpendicular to the X axis, but also the rotation in the plane perpendicular to the Y axis. it can.

  For this reason, even if the assembly accuracy when the lens holder 21 is incorporated in the optical pickup device 1 is shifted by 180 degrees with respect to the optical axis, the shift can be corrected.

Further, in the lens position adjustment mechanism of the optical pickup device 1 according to the present embodiment, the protrusions 23 a and 23 b are translated positions in the thickness direction of the housing 10, which is orthogonal to the sliding direction of the collimator lens position adjustment unit 20. It is preferable to be formed.

Thus, the protrusion 23 a · 23b coincides with the optical axis in the projection of the sliding direction of the collimator lens position adjustment unit 20, perpendicular to the sliding direction of the collimator lens position adjustment unit 20, the thickness of the housing 10 There is some deviation from the optical axis in the direction.

That is, the protrusion 23 a · 23b is becomes to shield light to be present in locations that match the optical axis, in this embodiment, providing the protrusions 23 a · 23b in a position moved parallel to the thickness direction of the housing 10 Thus, light shielding can be avoided.

  Further, the positions where the projections 23b and 23b are provided are preferably close to each other because the adjustment stroke increases if they are too far from the optical axis. In this regard, in the present embodiment, the protrusions 23 b and 23 b are formed at positions that are parallel to the thickness direction of the housing 10 and perpendicular to the sliding direction of the collimating lens position adjusting unit 20. In general, the thickness direction of the housing 10 is shorter than the length direction of the housing reference surface 10b. Therefore, the above requirements can be satisfied.

  In the lens position adjustment mechanism of the optical pickup device 1 of the present embodiment, it is preferable that a visual adjustment mark 14 a is provided at the center of the collimator lens 14.

  Thereby, since the adjustment mark 14a for visual recognition is provided in the center part of the collimating lens 14, the center position of the collimating lens 14 can be determined by the adjustment mark 14a for visual recognition. Therefore, when the lens position of the collimating lens 14 is adjusted, the collimating lens position adjusting unit 20 is adjusted so that the visual adjustment mark 14a provided at the center of the collimating lens 14 coincides with the optical axis. And can be rotated around the projections 23b and 23b.

  Therefore, the central portion of the collimating lens 14 can be easily placed on the optical axis by the visual adjustment mark 14a.

  Further, in the lens position adjusting mechanism of the optical pickup device 1 of the present embodiment, the lens is the collimating lens 14, and the visual adjustment mark 14 a is formed from a concave portion or a convex portion formed on the lens surface of the collimating lens 14. It is preferable that

  As a result, the collimating lens 14 has a function of making a divergent light beam emitted from a light source into a parallel light beam and making it incident on an objective lens (not shown). For example, a lens for correcting spherical aberration based on the thickness of an optical disk I can say that.

  Further, by forming a concave or convex portion at the central position of the lens surface of the collimating lens 14, the concave or convex portion functions as a visual adjustment mark 14a without shielding light at the central position of the lens surface. Can do.

  Further, in the lens position adjusting mechanism of the optical pickup device 1 according to the present embodiment, a through-hole centered on the optical axis is formed in the side wall of the housing 10 that rises at a position that intersects with the extension line of the optical axis that passes through the collimating lens 14. 10a is preferably provided.

  Thereby, it is possible to easily check whether the center position of the collimating lens 14 coincides with the optical axis through the through hole 10a from the outside of the housing 10.

  The optical pickup device 1 according to the present embodiment includes the lens position adjusting mechanism of the optical pickup device 1 described above.

  Therefore, the central portion of the collimating lens 14 can be placed on the optical axis, and as a result, the assembly accuracy when the lens holder 21 is incorporated in the optical pickup device 1 can be improved, and spherical aberration correction can be performed. It is possible to provide the optical pickup device 1 that can ensure high-performance recording / reproducing characteristics by increasing the accuracy.

  Further, the optical disk apparatus of the present embodiment is an optical disk apparatus provided with the above-described optical pickup device 1, which emits laser light from the semiconductor laser 11, records information on the optical disk using this laser light, Alternatively, the information recorded on the optical disc is reproduced.

  Therefore, the central portion of the collimating lens 14 can be placed on the optical axis, and as a result, the assembly accuracy when the lens holder 21 is incorporated in the optical pickup device 1 can be improved, and spherical aberration correction can be performed. It is possible to provide an optical disc apparatus capable of ensuring high performance recording / reproducing characteristics by increasing accuracy.

  In the lens position adjustment method of the optical pickup device 1 according to the present embodiment, a collimator lens position adjustment unit 20 in which a lens holder 21 is attached and fixed to a housing 10 that is an apparatus housing on which an optical component including a collimator lens 14 is mounted is positioned. When mounting and fixing, first, in the first step, the collimating lens 14 is moved to the housing reference plane 10b side of the collimating lens position adjusting unit 20 along the optical axis by a driving device such as a stepping motor 24a of the lens holder 21. Then, it is provided at the center position of the collimating lens 14 while checking through the through hole 10a centered on the optical axis provided on the side wall of the housing 10 that rises to a position intersecting with the extension line of the optical axis passing through the collimating lens 14. The visual adjustment mark 14a for visual recognition coincides with the optical axis. Parallel to slide along the collimating lens position adjusting unit 20 to the housing reference surface 10b as.

  Next, in the second step, after the collimating lens 14 is moved to the opposite side of the housing reference surface 10b of the collimating lens position adjusting unit 20 along the optical axis by a driving device such as a stepping motor 24a of the lens holder 21, While confirming through the through hole 10a, the collimating lens position adjusting unit 20 is placed between the collimating lens position adjusting unit 20 and the housing 10 so as to coincide with the optical axis of the visual adjustment mark 14a provided at the center position of the collimating lens 14. The projections 23a and 23b interposed between the housing reference surface 10b are rotated around the rotation center.

  As a result, the center of the collimating lens 14 coincides with the optical axis. If the collimating lens position adjusting unit 20 is attached and fixed to the housing 10 in the above state as the third step, the center of the collimating lens 14 coincides with the optical axis.

  Therefore, the central portion of the collimating lens 14 can be placed on the optical axis, and as a result, the assembly accuracy when the lens holder 21 is incorporated in the optical pickup device 1 can be improved, and spherical aberration correction can be performed. It is possible to provide a lens position adjusting method of the optical pickup device 1 that can ensure high-performance recording / reproducing characteristics by increasing accuracy.

  In the present embodiment, the driving device using the stepping motor 24a as the driving means for driving the collimating lens 14 for correcting the spherical aberration, and the photo interrupter 25 as the initial position detecting means for detecting the initial position, have.

  In the present embodiment, the position of the collimating lens 14 is detected by a driving device using the piezoelectric element 24 b as a driving means for driving the collimating lens 14 for correcting the spherical aberration, the permanent magnet 26 and the hall element 27. Position detecting means.

  Further, in the present embodiment, as a driving unit for driving the collimating lens 14 for performing spherical aberration correction, a driving device using a DC motor (not shown) and a photo interrupter 25 as an initial detecting unit for detecting an initial position are provided. It has.

  As a result, the initial position and the current position of the collimating lens 14 can be detected.

  In this embodiment, not only the lens position of the collimator lens 14 but also the lens position is adjusted by the entire collimator lens position adjustment unit 20 on which the collimator lens 14 is mounted. Accordingly, since the lens position is adjusted as a whole of the collimating lens position adjusting unit 20 in the housing 10, the assembly accuracy when the lens holder 21 is incorporated into the optical pickup device 1 including the assembly accuracy of the lens holder 21 itself is improved. Therefore, it is possible to provide a lens position adjusting mechanism of the optical pickup device 1 that can ensure high-performance recording / reproducing characteristics by increasing the accuracy of spherical aberration correction.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  The protrusions 23a and 23b in the optical pickup device 1 of the first embodiment are formed on the end surface on the objective lens side (not shown) on the base holder 22 of the collimator lens position adjusting unit 20 that accommodates the collimator lens 14, that is, on the end surface on the housing reference surface 10b side. It was provided.

  On the other hand, in the optical pickup device 2 of the present embodiment, as shown in FIGS. 8A and 8B, a projection 33 as an interposition member is formed on the housing reference surface 10b of the housing 10. That is, in the present embodiment, at the contact portion between the base holder 22 of the collimating lens position adjusting unit 20 and the housing 10, the projection 33 having a semicircular cross section, that is, a cross sectional arc shape is provided on the housing reference surface 10 b of the housing 10.

  As a result, when the collimator lens center portion of the collimator lens position adjustment unit 20 is aligned with the optical axis, the contact portion between the semicircular projection 33 of the housing 10 and the collimator lens position adjustment unit 20 is adjusted as the center of rotation. .

  In the present embodiment also, the shape of the projection 33 on the housing side can be made spherical as in the above.

  As described above, in the lens position adjusting mechanism of the optical pickup device 2 according to the present embodiment, the interposition member can be composed of the projection 33 having an arcuate cross section formed on the housing reference surface 10b. In addition, the cross-sectionally arcuate protrusion 33 refers to a protrusion in a state in which a cylinder is divided in the vertical direction.

  As a result, the projection 33 is formed on the housing reference surface 10b, and the shape of the projection 33 is a projection 33 having an arcuate cross section so that the collimating lens position adjusting unit 20 can easily slide in parallel along the housing reference surface 10b. I can. In addition, the collimating lens position adjusting unit 20 can be easily rotated along the cross-sectional arcuate projection 33 with the contact point between the cross-sectional arcuate projection 33 and the housing reference surface 10b as the rotation center.

  Further, in the lens position adjusting mechanism of the optical pickup device 2 of the present embodiment, the interposition member can be composed of a spherical protrusion 33 formed on the housing reference surface 10b. In addition, the spherical protrusion 33 refers to a protrusion in a state where a sphere is cut out.

  As a result, the interposition member is formed on the housing reference surface 10b, and the shape thereof is a spherical protrusion 33, so that the collimating lens position adjustment unit 20 can easily slide in parallel along the housing reference surface 10b. The collimating lens position adjusting unit 20 can be easily rotated along the spherical protrusion 33 with the contact point between the spherical protrusion 33 and the housing reference surface 10b as the rotation center. In this case, since the protrusion 33 has a spherical shape, the rotation direction is, for example, not only rotation in a plane perpendicular to the X axis, but rotation in a plane perpendicular to the Y axis, for example. it can.

  For this reason, even if the assembly accuracy when the lens holder 21 is incorporated in the optical pickup device 2 is shifted by 180 degrees with respect to the optical axis, the shift can be corrected.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

  The present invention relates to a lens position adjusting mechanism for an optical pickup device, an optical pickup device, an optical disk device, and a lens position adjusting method for an optical pickup device provided in an optical disc apparatus for recording or reproducing an optical disc. Therefore, for example, the present invention can be applied to an optical disc apparatus that can use either a laser beam with a wavelength of 660 nm of the DVD standard or a laser beam with a wavelength of 405 nm of the Blu-ray standard, and a laser beam with a wavelength of 660 nm of the DVD standard, It is possible to make an optical disc apparatus that can use both of the ray standard laser beam having a wavelength of 405 nm. It can also be applied to an optical disk device such as a CD.

(A) shows one Embodiment of the optical pick-up apparatus in this invention, and shows a structure when a collimating lens is located in the objective lens side in a collimating lens position adjustment unit, and a collimating lens is adjusted to a horizontal movement position. It is a front view, (b) is a front view which shows a structure when a collimating lens is located in the semiconductor laser side in a collimating lens position adjustment unit, and a collimating lens is rotationally moved and adjusted. (A) is a front view which shows the structure of the said optical pick-up apparatus, (b) is a bottom view which shows the structure of the said optical pick-up apparatus. It is a top view which shows the collimating lens of the said optical pick-up apparatus. (A) is a front view which shows the structure of the collimating lens position adjustment unit of the said optical pick-up apparatus, (b) is a bottom view which shows the structure of the said collimating lens position adjustment unit. (A) shows the modification of the collimating lens position adjustment unit of the said optical pick-up apparatus, and is a left view which shows the collimating lens position adjustment unit in which the spherical protrusion was formed, (b) is spherical shape It is a front view which shows the collimating lens position adjustment unit in which this processus | protrusion was formed, (c) is a bottom view which shows the collimating lens position adjustment unit in which the spherical processus | protrusion was formed. (A) is a front view showing the collimating lens position adjustment unit provided with a driving device for driving the lens holder along the optical axis, (b) is a right side view showing the collimating lens position adjustment unit, (C) is a bottom view showing the collimating lens position adjusting unit. (A) is a front view which shows the said collimating lens position adjustment unit provided with the other drive device which drives a lens holder along an optical axis, (b) is a right view which shows the said collimating lens position adjustment unit. And (c) is a bottom view showing the collimating lens position adjusting unit. (A) shows other embodiment of the optical pick-up apparatus in this invention, and is a front view which shows the structure of an optical pick-up apparatus, (b) is a collimating lens position adjustment in the housing of the said optical pick-up apparatus. It is a principal part enlarged front view which expands and shows the part of the dashed-dotted line which shows the protrusion formed in the housing side toward the unit. It is a front view which shows the structure of the conventional optical pick-up apparatus.

DESCRIPTION OF SYMBOLS 1 Optical pick-up apparatus 2 Optical pick-up apparatus 10 Housing 10a Through-hole 10b Housing reference surface 11 Semiconductor laser 12 Beam splitter 13 Reflecting mirror 14 Collimating lens (lens)
14a Adjustment mark 15 Prism 16 Rising mirror 17 Light receiving element 20 Collimating lens position adjustment unit 21 Lens holder (spherical aberration correcting means)
22 Base holder 23a Protrusion (intervening member)
23b Protrusion (intervening member)
24a Stepping motor (drive device)
24b Piezoelectric element (drive device)
25 Photo interrupter 26 Permanent magnet 27 Hall element 33 Protrusion (intervening member)

Claims (7)

In a lens position adjustment mechanism of an optical pickup device provided with spherical aberration correction means for correcting spherical aberration by moving a lens along an optical axis using a driving device,
While having a housing to be an apparatus housing for mounting optical components including the lens,
The spherical aberration correction means is mounted on a lens position adjustment unit that is attached and fixed to the housing.
Between the lens position adjustment unit and the housing, when the lens position adjustment unit is positioned and fixed to the housing, the lens position adjustment unit is a surface of the housing and faces the lens position adjustment unit. A surface extending in the thickness direction of the housing, which is slid in parallel along a housing reference surface which is a surface on the objective lens side of the optical pickup device, and the lens position adjustment unit can be rotated as a center of rotation. An interposition member is provided for contact,
The interposition member is composed of a projection having an arcuate cross section formed on the lens position adjustment unit,
An optical pickup device formed at a position parallel to the sliding direction of the lens position adjusting unit and parallel to the housing reference plane in the thickness direction of the housing from the center of the lens. Lens position adjustment mechanism. At the center of the lens, the lens position adjusting mechanism of the optical pickup device according to claim 1, characterized in that the adjustment marks for viewing is provided. The lens is a collimating lens,
3. The lens position adjusting mechanism for an optical pickup device according to claim 2, wherein the visual adjustment mark includes a concave portion or a convex portion formed on the lens surface. 4. The optical pickup device according to claim 3, wherein a through-hole centering on the optical axis is provided in a side wall of the housing that rises at a position intersecting with an extension line of the optical axis that passes through the collimating lens. Lens position adjustment mechanism. The optical pickup apparatus characterized by comprising a lens position adjusting mechanism of the optical pickup device written in any one of claims 1-4. An optical disc device comprising the optical pickup device according to claim 5 ,
An optical disc apparatus characterized by emitting laser light from a semiconductor laser and recording information on the optical disc using the laser light or reproducing information recorded on the optical disc. In a lens position adjustment method of an optical pickup device provided with spherical aberration correction means for correcting spherical aberration by moving a collimating lens along an optical axis using a driving device,
When positioning and fixing the lens position adjustment unit with the spherical aberration correction means attached and fixed to a housing that is an apparatus housing on which the optical component including the collimating lens is mounted,
The optical pickup device is a surface of the lens position adjustment unit that extends in the thickness direction of the housing facing the lens position adjustment unit along the optical axis of the collimating lens along the optical axis by the driving device of the spherical aberration correction unit. after moving the housing reference surface is the surface of the objective lens side, through the through hole around the optical axis in the side wall of the housing to launch a position intersecting an extension of the optical axis passing through the collimating lens a first step of parallel slide the lens position adjusting unit along the housing reference surface as adjustment marks for viewing provided in the center position of the collimator lens coincides with the optical axis while checking,
After completion of the first step, after the collimator lens is moved in the opposite to the housing reference plane side of the lens position adjusting unit along the optical axis by the driving device of the spherical aberration correction means, the through as adjustment marks for viewing provided in the center position of the collimator lens coincides with the optical axis while checking through the hole, the lens position adjustment unit, and the housing reference surface of the lens position adjustment unit and the housing It is composed of a projection having an arcuate cross section formed on the lens position adjustment unit, and is interposed between the center portion of the collimating lens and the thickness direction of the housing, which is perpendicular to the sliding direction of the lens position adjustment unit. A second step of rotating the interposed member formed at a position translated along the housing reference plane as a rotation center;
And a third step of attaching and fixing the lens position adjusting unit to the housing after completion of the second step.

Images