JP2008299888A - Optical pickup device and holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical pickup device which is compact, has high rigidity, can perform a focusing operation at a high speed and is adaptable to a high-density optical disk, and to provide a holder used therefor. <P>SOLUTION: Since a relation being D<W2 is established, an optical element OE can be housed in a housing of a holder HL being one example of this invention. Then, the dimension of the optical pickup device in a thickness direction can be suppressed small because the optical element OE and a coil of the holder HL are arranged at a position where they are at least partially overlapped when the holder HL is seen in the direction perpendicular to the optical axis of the optical element OE in the most displaced state to a rising mirror M side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical pickup device and a holder, and more particularly to an optical pickup device capable of recording and / or reproducing information on a high-density optical disc and having a compact configuration and a holder used therefor.

An optical pickup device capable of recording and / or reproducing information with respect to an optical disk represented by a CD or a DVD has been developed. In addition, the development of an optical pickup device capable of recording and / or reproducing information on a high-density optical disk such as Blu-ray Disc (registered trademark) or HD DVD using a blue-violet semiconductor laser having a wavelength of about 400 nm is rapidly progressing. Yes. Here, in the objective lens for forming a condensing spot in the optical pickup device, a focusing operation for appropriately focusing the condensing spot on the information recording surface of the optical disc at the time of recording and / or reproducing information, and an optical disc And a tracking operation to properly follow the track. Therefore, as shown in Patent Document 1, a small actuator is provided in the optical pickup device in order to perform focusing and tracking control of the objective lens.
JP 2002-74733 A Japanese Patent No. 3083068

  By the way, when recording and / or reproducing information with respect to a high-density optical disk, a semiconductor laser that emits a light beam of about 400 nm is often used. There is a problem that it varies greatly. If the wavelength of the emitted light beam is greatly shifted with respect to the reference wavelength, spherical aberration occurs on the information recording surface of the optical disk, which may cause a recording / reproducing error. For such wavelength variations, for example, when the optical pickup device is assembled, the optical axis direction position of the collimator that changes the divergence angle of the light beam emitted from the semiconductor laser and enters the objective lens is changed. It is conceivable that the amount of spherical aberration on the recording surface falls within an allowable range. Also, the optical pickup device is equipped with various optical elements. In order to suppress variations in the spherical aberration of these optical elements (especially the objective lens), it may be possible to adjust the position of the collimator in the optical axis direction. .

  Here, when the collimator is provided in the optical pickup device, if the collimator is disposed in the vicinity of the objective lens, the optical path length from the semiconductor laser to the optical disk is shortened, resulting in a compact layout. However, in a so-called slim type optical pickup device mounted on a notebook personal computer or the like, there is a limitation in the thickness direction. Therefore, in the case of a slim type optical pickup device using a semiconductor laser that emits a light beam having a short wavelength, it is desired to efficiently arrange a collimator between the rising mirror and the objective lens.

  However, in this configuration, if the objective lens held by the holder is displaced in the optical axis direction for focusing control, the holder and the collimator may interfere with each other. On the other hand, Patent Document 2 discloses an optical pickup device that holds an objective lens in a cantilever shape and displaces it in the optical axis direction. However, the holder disclosed in Patent Document 2 has a problem that the rigidity is low and the focusing operation cannot be performed at high speed.

  The present invention has been made in view of such problems, and provides an optical pickup device compatible with a high-density optical disc and a holder used therefor, which is compact but can perform a focusing operation at high speed with high rigidity. The purpose is to do.

The optical pickup device according to claim 1 is an optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
The holder has at least two parts extending in the optical axis direction of the objective lens, and at least a part of the optical unit is between the parts in a state where the holder is displaced to the rising mirror side most. It is characterized by being arranged.

  The principle of the present invention will be described with reference to the drawings. Here, the portion extending in the optical axis direction of the objective lens will be described as a side wall. However, the portion extending in the optical axis direction of the objective lens includes a side wall with a hole, a column portion, and the like. FIG. 1 is a diagram showing a relationship between a holder HL ′ that holds an objective lens OBJ according to a comparative example and an optical element OE that constitutes an optical unit, and FIG. 2 shows an objective lens OBJ according to an example of the present invention. It is a figure which shows the relationship between the holder HL to hold | maintain and the optical element OE which comprises an optical unit.

  1 and 2, holders HL 'and HL have a casing shape with the bottom surface removed, and coils CL and CL are attached to the outside of the opposing side wall HLw. The optical element OE is disposed between the objective lens OBJ and the rising mirror M. Assuming that the width inside the housing in the comparative example shown in FIG. 1 is W1 and the width inside the housing in the example of the present invention shown in FIG. 2 is W2, if the outer diameter of the optical element OE is D, W1 < The relationship D <W2 is established.

  That is, in the comparative example, since the relationship of W1 <D is established, the optical element OE cannot be accommodated in the housing of the holder HL ′, so that the holder HL ′ is most displaced to the rising mirror M side. The holder HL ′ and the optical element OE must be arranged with a gap in the optical axis direction, which increases the dimension in the thickness direction of the optical pickup device.

  On the other hand, in the present invention, since the relationship of D <W2 is established, the optical element OE can be accommodated in the housing of the holder HL which is an example of the present invention. Therefore, at least a part of the optical element OE is disposed between the side walls HLw to which the coil CL is attached when viewed in the direction perpendicular to the optical axis of the optical element OE with the holder HL being displaced to the most rising mirror M side. Thus, the dimension in the thickness direction of the optical pickup device can be kept small. Further, by providing the holder HL with a pair of side walls HLw, the rigidity can be increased and sufficient high-order resonance performance can be obtained.

  In order to simplify the description in FIG. 2, an example in which a single optical element OE can be accommodated in the holder HL is shown. However, as shown in FIG. In many cases, the optical unit is configured to be held by a holding member HM or the like. Accordingly, when the optical element OE is held by the holding member HM, the dimension S of the portion accommodated in the holder HL including the holding member HM is larger than the width W2 inside the housing of the holder HL. It is preferable to set so as to be small. Here, the “optical element” includes a collimator, an expander, a wave plate, a liquid crystal element, a hologram element, a diffraction element, a composite element, and the like.

  According to a second aspect of the present invention, in the optical pickup device according to the first aspect, the portions are arranged symmetrically with the optical axis of the optical element in between.

  According to a third aspect of the present invention, in the optical pickup device according to the first or second aspect, the coils attached to the holder are disposed symmetrically with respect to the optical axis of the optical element. Therefore, the objective lens can be driven through the holder with a good balance by the magnetic force generated in the coil. In particular, when the drive coil of the holder is symmetrically arranged, the rigidity can be increased compared to the case of an asymmetrical arrangement, so that the high-order resonance performance of the actuator is improved, and broadband control necessary for high-speed recording / reproduction, etc. Is possible.

The optical pickup device according to claim 4 is an optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
A coil is attached to the holder, and the coil is arranged symmetrically with respect to the optical axis of the optical element in a given magnetic field, and the holder is most displaced to the rising mirror side. The optical unit and the part are arranged at least partially overlapping when viewed in the direction perpendicular to the optical axis of the optical element.

  For example, a pair of coils are attached to the holder so as to face two magnets, respectively, and arranged symmetrically across the optical axis of the optical element, or a single coil is placed between the two magnets in the holder. If the optical elements are arranged symmetrically so as to surround the optical axis, the coil generates a thrust to move the holder in a magnetic field provided by the magnet. Thus, if the coils are arranged symmetrically with the optical axis of the optical element in between, the balance is improved when the holder is moved, and higher-order resonance performance can be improved. Further, referring to FIG. 2, when the holder HL is displaced to the most rising mirror M side and viewed in the direction perpendicular to the optical axis of the optical element OE, the side wall HLw of the optical element OE and the holder HL (objective lens) Since an example of a portion extending in the optical axis direction of the OBJ is arranged at least at a partially overlapping position, the dimension in the thickness direction of the optical pickup device can be kept small.

The optical pickup device according to claim 5 is an optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc through an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
The optical unit and the coil attached to the holder are at least partially overlapped when viewed in the direction perpendicular to the optical axis of the optical element with the holder being most displaced to the rising mirror side. It is characterized by being arranged.

  According to the present invention, referring to FIG. 2, the coil of the optical element OE and the holder HL when viewed in the direction perpendicular to the optical axis of the optical element OE with the holder HL displaced most to the rising mirror M side. Since CL is arranged at least at a partially overlapping position, the dimension in the thickness direction of the optical pickup device can be kept small.

  An optical pickup device according to a sixth aspect of the present invention is the optical pickup device according to the fifth aspect of the invention, wherein the coil is arranged symmetrically with respect to the optical axis of the optical element. The objective lens can be driven with a good balance by the magnetic force applied. In particular, if the drive coil of the holder is symmetrically arranged, the rigidity can be increased as compared with the case of an asymmetrical arrangement, so that the higher order resonance characteristics of the actuator can be improved.

The optical pickup device according to claim 7 is an optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder that attaches two coils across the objective lens and is displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
When viewed in the direction perpendicular to the optical axis of the optical element in a state where the holder is most displaced to the rising mirror side, the optical unit and the coil or the holder are arranged at least partially overlapping each other. It is characterized by that.

  According to the present invention, with reference to FIG. 2, the optical element OE and the objective lens when viewed in the direction perpendicular to the optical axis of the optical element OE with the holder HL displaced most to the rising mirror M side. Since the coil CL or the holder HL disposed on both sides of the optical pickup device is disposed at least partially overlapping, the dimension in the thickness direction of the optical pickup device can be kept small.

  An optical pickup device according to an eighth aspect of the invention is characterized in that, in the invention according to any one of the first to seventh aspects, the optical element is a collimator, and therefore the collimator is brought as close as possible to the objective lens. Thus, the optical path length is shortened, and a compact optical pickup device can be provided.

  An optical pickup device according to a ninth aspect is the invention according to any one of the first to eighth aspects, wherein the holder is displaceable in an optical axis direction of the optical element and a first direction orthogonal to the optical axis. And a space for accommodating at least a part of the optical unit, wherein the space has a dimension in a second direction orthogonal to the optical axis and the first direction in the first direction. It is characterized by being smaller than the dimensions.

  According to a tenth aspect of the present invention, in the invention according to the ninth aspect, the dimension of the optical element in the space in the direction perpendicular to the optical axis is larger than the outer diameter of the optical element.

  According to an eleventh aspect of the present invention, in the optical pickup device of the ninth or tenth aspect, the optical element has a dimension in the second direction smaller than a dimension in the first direction. Features.

  FIG. 4 is a view of the holder HL according to an example of the present invention as viewed from the rising mirror side. In FIG. 4, the objective lens OBJ is indicated by a dotted line, and its optical axis extends in a direction perpendicular to the paper surface. In the space inside the housing of the holder HL, the dimension W2 'in the second direction, which is the vertical direction in FIG. 4, is smaller than the dimension W2 in the first direction, which is the horizontal direction in FIG. In addition, the outer periphery of the optical element OE has a flat portion OE1 that is scraped off by two parallel surfaces. Therefore, even when the outer diameter D of the optical element OE is larger than the dimension W2 ′ (D> W2 ′), by directing the flat portion OE1 in the second direction, the optical element OE as a part of the optical unit is It can be accommodated in the space of the holder HL. If the tracking direction of the objective lens is the direction of the dimension W2 (left and right direction in FIG. 4), the dimension W1 in the holder HL only gives a slight gap to the outer shape of the optical element OE and suppresses the interference between them. Thus, the holder HL can be made compact.

  The optical pickup device according to a twelfth aspect of the invention according to the eleventh aspect is characterized in that the optical element has a portion cut in the second direction, so the holder and the optical element Interference can be suppressed. Here, the cut includes an I-cut that cuts the outer shape on two planes parallel to the optical axis of the optical element, and a D-cut that cuts the outer shape on a plane parallel to the optical axis.

  An optical pickup device according to a thirteenth aspect is characterized in that, in the invention according to any one of the first to twelfth aspects, at least one notch or hole is provided in a side wall of the holder. Thus, the collimator adjusting jig, the inspection light beam, and the like can be passed.

  The holder according to claim 14 is a holder used in the optical pickup device according to any one of claims 1 to 13, and is displaceable in an optical axis direction of the optical element and a first direction orthogonal to the optical axis. And has a space for accommodating at least a part of the optical unit, and the space has a dimension in a second direction orthogonal to the optical axis and the first direction. It is characterized by being smaller than the size of.

  The holder according to a fifteenth aspect is characterized in that, in the invention according to the fourteenth aspect, the space is larger than an outer diameter of the optical element.

  The holder according to claim 16 is the invention according to claim 14 or 15, wherein the optical element has a dimension in the second direction smaller than a dimension in the first direction. To do.

  According to a seventeenth aspect of the present invention, there is provided the holder according to the sixteenth aspect, wherein the optical element has a portion cut in the second direction.

  The holder according to claim 18 is characterized in that, in the invention according to any one of claims 14 to 17, at least one notch or hole is provided in a side wall of the holder.

  ADVANTAGE OF THE INVENTION According to this invention, although it is compact, it can provide the optical pickup apparatus corresponding to a high density optical disk which can perform focusing operation | movement with high rigidity and high speed, and a holder used therewith.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 5 is a perspective view of an optical pickup device including the lens driving device ACT according to the present embodiment. In the lens driving device ACT, a plate-like base 1 that also serves as a yoke is fixed to a housing (not shown). A housing 2 is fixed on the base 1. A substrate 3 is attached to the front side in the figure of the housing 2. One end of a total of six wires 4 is fixed to the substrate 3, three on each side, and the wires 4 on each side are arranged in parallel at equal intervals in the vertical direction and extend along the base 1. is doing. The other end of the wire 4 is soldered to a fixture 14 attached to the side surface of the holder 5. The wire 4 has a function of movably supporting the holder 5 with respect to the base 1 and a function of supplying power to the coil from the substrate 3 to which a wiring (not shown) is connected. The casing 2 is filled with a gel (not shown) having a damping effect for the wire 4.

  The resin holder 5 that is movable with respect to the base 1 has a substantially cross shape with excellent balance as shown in FIG. 5, and an objective lens 6 is mounted in a central circular opening (not shown). Yes. This objective lens 6 is used for condensing a laser beam on an information recording surface of an optical disk in an optical pickup device. The holder 5 has two rectangular openings 5a (only the front side is shown) on both sides.

  In the rectangular opening 5a on the near side, yokes 7A and 8A with L-shaped plates back to back extend from above. A first coil group G1 is arranged in the rectangular opening 5a so as to wind around the yokes 7A and 8A. With respect to the first coil group G1, a magnet 10A is disposed on the front side across the rectangular opening 5a, and a magnet 10B is disposed on the back side. The magnet 10A is lined with the yoke 7B, and the magnet 10B is lined with the yoke 8B. The yokes 7B and 8B are a part of the base 1, and the end of the yoke 7A is connected to the upper end of the yoke 7B, and the end of the yoke 8A is connected to the upper end of the yoke 8B. Between the first coil group G1 and the magnets 10A and 10B, tracking coils 11A and 11B wound so that the first coil group G1 and the winding axis are orthogonal to each other are arranged.

  On the other hand, yokes 7C and 8C with L-shaped plates back to back extend from above in the rectangular opening on the back side with the objective lens 6 sandwiched from the rectangular opening 5a. A second coil group G2 is disposed in the rectangular opening so as to wind around the yokes 7C and 8C. With respect to the second coil group G2, a magnet 10C is disposed on the front side with a rectangular opening therebetween, and a magnet 10D is disposed on the back side. The magnet 10C is lined with the yoke 7C, and the magnet 10D is lined with the yoke 8D. The yokes 7D and 8D are part of the base 1, and the end of the yoke 7C is connected to the upper end of the yoke 7D, and the end of the yoke 8C is connected to the upper end of the yoke 8D. Between the second coil group G2 and the magnets 10C and 10D, a tracking coil (not shown in FIG. 5, 11D in FIG. 6) wound so that the second coil group G2 and the winding axis are orthogonal to each other is arranged. Yes.

  FIG. 6 is a view of the holder periphery in the lens driving device ACT according to the present embodiment as seen from the light source side. The hollow housing-like holder 5 has four side surfaces 5f (the front side surface is cut away so that the inside can be seen) and a top surface 5g that is connected to the side surface 5f and holds the objective lens 6. A holding portion 5d that holds the tracking coils 11A and 11B and a holding portion 5e that holds the tracking coils 11C and 11D are connected to the side wall 5f facing in the left-right direction in FIG.

  The holder 5 has the same shape as the holder shown in FIG. 4 when viewed in the optical axis direction of the objective lens 6. When the holder 5 is most displaced to the raising mirror 15 side during the focusing operation, the collimator 16 disposed between the objective lens 6 and the raising mirror 15 is positioned between the holders 5 d and 5 e of the holder 5. That is, it is accommodated in the holder 5. Although not shown, the collimator 16 is held by a holding member (not shown), and can be adjusted so that it can be displaced in the optical axis direction during assembly. However, the position is set to a position that does not interfere with the collimator 16 even if the objective lens 6 moves downward by the focusing operation.

  Next, the operation of the optical pickup device including the lens driving device ACT according to the present embodiment will be described. Here, it is assumed that the first coil group G1 and the second coil group G2 each have an outer coil and an inner coil in two layers. However, only one coil may be used.

  In FIG. 5, the blue-violet laser beam emitted from the semiconductor laser LD as the light source passes through the polarization beam splitter PBS, passes through the λ / 4 wavelength plate QWP, and is reflected by the rising mirror 15 in FIG. The light is condensed on an information recording surface of an optical disk (not shown) via the collimator 16 and the objective lens 6. The light beam reflected from the information recording surface passes through the objective lens 6 and the collimator 16, is reflected by the rising mirror 15, passes through the λ / 4 wavelength plate QWP, is reflected by the polarizing beam splitter PBS, and is reflected on the photodetector PD. Since the light is incident, information can be recorded and / or reproduced on the optical disc using the output signal.

  Here, a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD is detected, and focus detection and track detection are performed. Based on this detection, the lens driving device ACT is driven to move the objective lens OBJ so that the light beam from the semiconductor laser LD is imaged on the information recording surface of the optical disk. The lens drive device ACT is driven by power feeding through the wire 4.

  When power is supplied through the wire 4, current flows in the same direction (in the clockwise direction here) with the same current value in the outer coil of the first coil group G1 and the outer coil of the second coil group G2. According to Fleming's left-hand rule, the two coils have respective upward magnetic forces in the figure. Accordingly, the holder 5 to which the first coil group G1 and the second coil group G2 are fixed moves upward in the drawing, thereby realizing the focusing operation by moving the objective lens 6 in the optical axis direction. Can do. If the direction of the current is reversed, the holder 5 moves downward, but the holder 5 does not interfere with the collimator 16 even if it moves downward. At this time, a stopper can be provided so that the holder 5 does not move excessively downward. As such a stopper, although not shown, the base 1 is placed so as to be in contact with the holder 5 that has moved to a predetermined position, or a protrusion that contacts the holder 5 that has been moved to a predetermined position is formed on the base 1. There are various modes, such as, providing a separate member, or bringing the protrusion provided on the holder 5 into contact with the base 1.

  On the other hand, when a current flows in the clockwise direction through the inner coil of the first coil group G1, and a current flows in the counterclockwise direction through the inner coil of the second coil group G2, the left hand of Fleming According to the law, a magnetic force directed upward in the figure is generated in one inner coil, and a magnetic force directed downward in the figure is generated in the other inner coil. Therefore, a moment that tilts the holder 5 around the position of the optical axis acts. Thereby, a tilting operation for tilting the objective lens 6 can be realized. Note that if the direction of the current is reversed, the holder 5 is inclined to the opposite side. The tilt adjustment operation may be performed using the outer coil, and the focusing operation may be performed using the inner coil.

  Furthermore, by passing an electric current through the tracking coils 11A to 11D, the holder 5 can be moved together with the objective lens 6 in a direction perpendicular to the optical axis, thereby performing a tracking operation.

  The present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be modified or improved as appropriate. For example, the material of the holder is not limited to a resin, and a metal such as an aluminum alloy or a magnesium alloy can also be used. For example, only one focus coil may be provided. Furthermore, a notch or a hole is provided in the side wall of the holder, and a collimator adjusting jig, an inspection light beam, or the like can be passed through the notch or hole. Further, as shown in FIGS. 7 and 8, a configuration in which a single coil CL is wound around the holder HL and disposed between the two pairs of magnets MG and the yoke YK is also included in the present invention. In the configuration of FIG. 7, when a current is passed through the coil CL in a magnetic field generated between the magnet MG and the yoke YK, thrust for driving the holder HL is generated in the direction perpendicular to the paper surface at points p1 and p2. On the other hand, in the configuration shown in FIG. 8, when a current is passed through the coil CL in the magnetic field generated between the magnet MG and the yoke YK, the thrust for driving the holder HL is perpendicular to the paper surface at points p1, p2, p3, and p4. Will occur.

It is a figure which shows the relationship between the holder HL holding the objective lens OBJ concerning a comparative example, and the optical element OE which comprises an optical unit. It is a figure which shows the relationship between the holder HL holding the objective lens OBJ concerning an example of this invention, and the optical element OE which comprises an optical unit. It is a figure which shows the relationship between the holder HL holding the objective lens OBJ concerning another example of this invention, and an optical unit. It is the figure which looked at the holder HL concerning an example of this invention from the raising mirror side. It is a perspective view of the optical pick-up apparatus containing the lens drive device ACT concerning this Embodiment. It is the figure which looked at the holder periphery in the lens drive device ACT concerning this Embodiment from the light source side. It is the figure which looked at the holder HL concerning an example of this invention from the raising mirror side. It is the figure which looked at the holder HL concerning an example of this invention from the raising mirror side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Case 4 Wire 5 Holder 5a Rectangular opening 5c Notch 5f Side wall 5d, 5e Holding part 6 Objective lens 7A-7D Yoke 8A-8D Yoke 10A-10D Magnet 11A-11D Tracking coil 14 Fixing tool ACT Lens drive device G1 1st 1 coil group G2 2nd coil group

Claims (18)

An optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
The holder has at least two parts extending in the optical axis direction of the objective lens, and at least a part of the optical unit is between the parts in a state where the holder is displaced to the rising mirror side most. An optical pickup device that is arranged.   The optical pickup device according to claim 1, wherein the portions are arranged symmetrically with respect to the optical axis of the optical element.   3. The optical pickup device according to claim 1, wherein the coils attached to the holder are arranged symmetrically with respect to the optical axis of the optical element. An optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
A coil is attached to the holder, and the coil is arranged symmetrically with respect to the optical axis of the optical element in a given magnetic field, and the holder is displaced to the rising mirror side most. The optical pickup device is characterized in that the optical unit and the part are arranged at least partially overlapping when viewed in a direction perpendicular to the optical axis of the optical element. An optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder attached with a coil and displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
The optical unit and the coil attached to the holder are at least partially overlapped when viewed in the direction perpendicular to the optical axis of the optical element with the holder being most displaced to the rising mirror side. An optical pickup device that is arranged.   The optical pickup device according to claim 5, wherein the coils are arranged symmetrically with respect to an optical axis of the optical element. An optical pickup device that reflects a light beam incident from a light source side by a rising mirror and collects the light beam on an optical disc via an objective lens,
A movable holder that attaches two coils across the objective lens and is displaced while holding the objective lens;
An optical unit including an optical element disposed between the raising mirror and the objective lens;
When viewed in the direction perpendicular to the optical axis of the optical element in a state where the holder is most displaced to the rising mirror side, the optical unit and the coil or the holder are arranged at least partially overlapping each other. An optical pickup device.   The optical pickup device according to claim 1, wherein the optical element is a collimator.   The holder is displaceable in an optical axis direction of the optical element and in a first direction orthogonal to the optical axis, and has a space for accommodating at least a part of the optical unit, and the space includes the light The optical pickup device according to claim 1, wherein a dimension in a second direction orthogonal to the axis and the first direction is smaller than a dimension in the first direction.   The optical pickup device according to claim 9, wherein a dimension of the optical element in the space in a direction perpendicular to the optical axis is larger than an outer diameter of the optical element.   11. The optical pickup device according to claim 9, wherein the optical element has a dimension in the second direction smaller than a dimension in the first direction.   The optical pickup device according to claim 11, wherein the optical element has a portion cut in the second direction.   The optical pickup device according to claim 1, wherein at least one notch or hole is provided in a side wall of the holder.   A holder used in the optical pickup device according to any one of claims 1 to 13, wherein the holder is displaceable in an optical axis direction of the optical element and a first direction orthogonal to the optical axis. It has a space for accommodating at least a part thereof, and the space has a dimension in a second direction orthogonal to the optical axis and the first direction smaller than a dimension in the first direction. holder.   The holder according to claim 14, wherein a dimension of the optical element in the space in a direction perpendicular to the optical axis is larger than an outer diameter of the optical element.   The holder according to claim 14 or 15, wherein the optical element has a dimension in the second direction smaller than a dimension in the first direction.   The holder according to claim 16, wherein the optical element has a portion cut in the second direction.   The holder according to any one of claims 14 to 17, wherein at least one notch or hole is provided in a side wall of the holder.

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