WO2011040573A1 - 弾性部材、光学素子の取付構造、並びに、それを備えるピックアップ装置 - Google Patents
弾性部材、光学素子の取付構造、並びに、それを備えるピックアップ装置 Download PDFInfo
- Publication number
- WO2011040573A1 WO2011040573A1 PCT/JP2010/067155 JP2010067155W WO2011040573A1 WO 2011040573 A1 WO2011040573 A1 WO 2011040573A1 JP 2010067155 W JP2010067155 W JP 2010067155W WO 2011040573 A1 WO2011040573 A1 WO 2011040573A1
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- WIPO (PCT)
- Prior art keywords
- diffraction grating
- elastic member
- optical element
- holder
- spring
- Prior art date
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
Definitions
- the present invention relates to an elastic member, an optical element mounting structure, and a pickup device including the same.
- the disk device is used to read the disk data.
- a disk device is used to record data on the disk. Examples of the disc include “CD” (Compact Disc) (trademark) and “DVD” (registered trademark) (Digital Versatile Disc).
- an optical element mounting structure according to claim 1 of the present invention is provided with an optical element, an elastic member used when the optical element is equipped, the optical element and the elastic member. And the elastic member is press-fitted into the holding part, and the optical element is provided in the holding part by the elastic member.
- An optical element mounting structure is the optical element mounting structure according to claim 1, wherein the optical element is formed in a substantially rectangular plate shape in front view through which light can pass.
- the elastic member is formed in a substantially concave shape in front view through which light can pass.
- the optical element mounting structure according to claim 3 is the optical element mounting structure according to claim 1 or 2, wherein the holding portion is formed using a resin, and the elastic member is formed of a metal. It is characterized by being formed.
- the optical element mounting structure according to claim 4 is the optical element mounting structure according to any one of claims 1 to 3, wherein the optical element includes a diffraction grating that divides incident light into a plurality of parts. It is characterized by that.
- the elastic member according to claim 5 is an elastic member used when mounting the optical element while aligning the optical element with the holding portion, and includes a press-fit fixing portion that positions and fixes the elastic member substrate portion with respect to the holding portion. It is characterized by that.
- An elastic member according to a sixth aspect is the elastic member according to the fifth aspect, wherein the elastic member substrate portion is formed in a substantially plate shape, and the press-fit fixing portion is a left and right front view of the elastic member substrate portion. It is characterized by being a projecting portion projecting on both sides.
- the elastic member according to claim 7 is the elastic member according to claim 5 or 6, wherein the press-fit fixing part is an inclined surface part that enables the elastic member substrate part to be detachably mounted on the holding part. It is characterized by having.
- An elastic member according to an eighth aspect is the elastic member according to any one of the fifth to seventh aspects, wherein the contact force generating portion that generates a restoring elastic force with respect to the optical element and the holding portion is the elastic member.
- the elastic member is extended to the substrate portion.
- An elastic member according to a ninth aspect is the elastic member according to the eighth aspect, wherein the contact force generating portion is folded back with respect to the elastic member substrate portion.
- An optical element mounting structure is the optical element mounting structure according to any one of the first to fourth aspects, wherein the elastic member is any one of the fifth to ninth aspects.
- the elastic member described is used.
- a pickup device is characterized by having the optical element mounting structure according to any one of the first to fourth or tenth aspects.
- the optical element when an optical element is provided in the holding part, the optical element is provided in the holding part by the elastic member provided in the holding part. Since the elastic member is press-fitted into the holding portion, for example, when the mounting position of the optical element equipped with the elastic member in the holding portion is adjusted, the elastic member is inadvertently shifted, and accordingly, for example, the optical element Incorrect positioning is avoided. Accordingly, the optical element can be accurately provided in the holding portion.
- the optical element when the optical element is mounted on the holding unit while being aligned, the optical element is provided in the holding unit by the elastic member mounted on the holding unit.
- the elastic member substrate portion is provided with a press-fit fixing portion that is positioned and fixed with respect to the holding portion, for example, when the mounting position of the optical element mounted on the holding portion together with the elastic member is adjusted, the elastic member is It is avoided that the optical element is inadvertently shifted and, for example, the position of the optical element is adjusted incorrectly. Accordingly, the optical element can be accurately provided in the holding portion.
- the protrusions are provided on the left and right sides of the elastic member substrate portion of the elastic member, so that the horizontal position when the elastic member is attached to the holding portion is possible, and By adjusting the position of the optical element, it is possible to prevent lateral displacement of the elastic member when the optical element is moved in the left-right direction from the initial mounting position. Therefore, as a result, the contact position between the optical element and the elastic member can always be stabilized. As a result, the stability and reliability of the initial performance can be improved.
- the elastic member and / or the diffraction grating is attached to and detached from the holding portion at the time of attachment and repair, and the spring base portion constituting the elastic member is inclined to the press-fit fixing portions on the left and right sides of the front view.
- the surface portion is formed so that the elastic member can be easily attached to and detached from the holding portion.
- the inclined surface portions are formed in the press-fit fixing portions on both the left and right sides of the spring base plate constituting the elastic member, for example, so that the press-fit fixing portion having a substantially tapered shape is formed in front view of the spring base plate.
- the optical element is provided with the position adjusted with high precision by the elastic member. Therefore, a pickup device having excellent optical characteristics can be configured.
- FIG. It is a perspective view which shows an elastic member.
- (A) is a plan view showing a first embodiment of a holding portion constituting the optical element mounting structure according to the present invention
- (B) is a cross-sectional view along BB of (A)
- (C) is (A).
- FIG. It is a top view which shows 1st embodiment of the optical element which comprises the attachment structure of the optical element which concerns on this invention.
- (A) is sectional drawing of the one side which shows the fixing
- (B) is sectional drawing of the other side which shows the fixing
- FIG. 1 It is the schematic which shows a pick-up apparatus and a disk apparatus provided with the same. It is a perspective view which shows 2nd embodiment of the pick-up apparatus which concerns on this invention. It is a perspective view which shows 2nd embodiment of the optical element and holding member which comprise the attachment structure of the optical element which concerns on this invention. It is explanatory drawing of the optical element and holding member which similarly comprise the attachment structure of an optical element. It is a perspective view which similarly shows the optical element and holding member which comprise the attachment structure of an optical element. It is a perspective view which similarly shows the optical element, elastic member, holding
- FIG. 15 is an enlarged perspective view illustrating a state where the optical element, the elastic member, and the holding member illustrated in FIG. 14 are installed in the holding unit. It is a top view which similarly shows the attachment structure of the optical element with which the optical element, the elastic member, and the holding member were equipped in the holding part, and a pickup apparatus.
- FIG. 17 is an enlarged explanatory view showing an optical element mounting structure in which the optical element, the elastic member, and the holding member are mounted on the holding portion by a joining member and the pickup device in the main part D shown in FIG.
- the head main body assembly 7 constituting the driving device assembly 5 includes a substantially flat base portion 80, a pair of long round bar-like supports 91 and 92 attached to the substantially flat base portion 80, and And a head driving device 90 movably mounted on a pair of long round bar-like supports 91 and 92.
- the optical head driving device 90 includes a pair of optical members 131 and 132 that irradiate light in a state where the light surface such as laser light is focused on the signal surface portion Ma of the disk M, which is one of the media M.
- the base portion in this specification is, for example, a base or base such as a substantially plate-like one or a substantially substrate-like one, and is referred to for convenience.
- the media means, for example, a disk on which data, information, signals, etc. are stored.
- the motor main body assembly 50 constituting the driving device assembly 5 includes a substantially flat substrate 60 having a circuit (not shown) and a motor attached to the substantially flat substrate 60 so as to be energized. And a driving device 70.
- the motor driving device 70 includes a small electric motor 71 that generates a rotational driving force, a rotating shaft 72 provided in the small electric motor 71, and a rotation holding unit 73 that is mounted on the rotating shaft 72 and on which the disk M is mounted. And is configured.
- the drive device assembly 5 and the disk device 1 having the drive device assembly 5 for example, the traverse mechanism 5 and the optical disk device 1 having the same are used.
- an optical pickup apparatus 100 that can emit laser light (LASER: light amplification by stimulation of radiation) through optical members 131 and 132 that are objective lenses, for example. It is used.
- LASER laser light
- OPU optical pick-up or an optical pick-up unit
- OLB objective lens
- Data such as information recorded on the medium M such as the disk M is reproduced by the laser light focused by the OBLs 131 and 132 of the OPU 100 provided in the drive device assembly 5 of the disk device 1. Further, data such as information is recorded on the medium M such as the disk M by the laser light focused by the OBLs 131 and 132 of the OPU 100 provided in the drive device assembly 5 of the disk device 1. Further, data such as information recorded on the medium M such as the disk M is erased by the laser light focused by the OBLs 131 and 132 of the OPU 100 provided in the drive device assembly 5 of the disk device 1.
- the OPU 100 that constitutes the drive unit assembly 5 of the disk device 1 reproduces data, information, and signals recorded on various media M such as various disks M, and various media such as various disks M that are writable or rewritable. Data, information, and signals are recorded in M, and data, information, and signals of various media M such as various writable or rewritable discs M are erased.
- the OPU 100 constituting the drive unit assembly 5 of the disk device 1 includes, for example, “CD” (Compact Disc) (trademark) series / standard media and “DVD” (registered trademark) (Digital Versatile Disc) series / Standard media, “HD DVD” (High Definition DVD) (registered trademark) series / standard media, and “CBHD (China Blue High-Definition)” which is a media based on the standards established in China (example: The old name “CH-DVD”) series / standard media and the “BD” (Blu-ray / Blu-ray Disc) (registered trademark) series / standard media are supported.
- CD Compact Disc
- DVD Digital Versatile Disc
- HD DVD High Definition DVD
- CBHD China Blue High-Definition
- the OPU 100 that constitutes the drive device assembly 5 of the disk device 1 corresponds to, for example, at least one medium selected from the group consisting of the various media. More specifically, the OPU 100 constituting the drive device assembly 5 of the disk device 1 corresponds to any one of the plurality of media.
- the medium M examples include the above-described various optical discs M, and a medium M having the following form is also included.
- the disk M may be an optical disk M provided with a signal surface portion Ma on both sides of the disk and capable of data writing / erasing and data rewriting.
- an optical disk M provided with a two-layer signal surface portion Ma and capable of data writing / erasing, data rewriting and the like can be cited.
- an “HD DVD” and / or “Blu-ray / Blu-ray Disc” optical disc provided with a three-layer signal surface portion and capable of data writing / erasing, data rewriting, etc. (see FIG. Not shown).
- a “Blu-ray / Blu-ray Disc” optical disc provided with a four-layer signal surface portion and capable of data writing / erasing, data rewriting, and the like (not shown) is also included.
- an optical disk M that can perform various kinds of writing on the label or the like by irradiating a laser beam on the side of the label surface of the optical disk M is also included.
- the signal surface portion Ma and the label surface portion of the optical disc M are configured to include a thin layer such as a metal thin film, for example. Data, information, a signal, etc. are recorded on the signal surface part Ma comprised with a metal thin film etc., and an image etc. are recorded on a label surface part.
- the signal surface portion Ma of the optical disc M is configured as a signal layer Ma configured to include, for example, a thin metal layer.
- the various optical disks M include optical disks having a multi-layer / multi-layer structure in various forms. For convenience, various types of optical disks will be collectively described as an optical disk M.
- an optical disk device 1 capable of emitting laser light is used. More specifically, as the disk device 1, for example, an optical disk device 1 corresponding to various optical disks M such as “CD”, “DVD”, “HD DVD”, “CBHD”, “BD”, and the like is used. Further, as the driving device assembly 5 constituting the disk device 1, for example, in the radial direction of the optical disk M so as to cross a substantially spiral signal portion (not shown) such as pits and tracks of the optical disk M. A traverse mechanism 5 is used that is configured so that the OPU 100 can be reciprocated along a substantial distance.
- the OPU 100 constituting the optical disc device 1 or the traverse mechanism 5 for example, the OPU 100 corresponding to the various optical discs M is used.
- the supports 91 and 92 that constitute the optical disk device 1 or the traverse mechanism 5 and support the OPU 100 movably for example, slide shafts 91 and 92 having substantially straight round bar shapes are used.
- a disk drive device 40 that includes a spindle motor 71, a turntable 73, and the like and that rotates the optical disk M is used.
- the turntable 73 provided on the spindle motor 71 of the drive device 40 has both functions of aligning the optical disk M and ensuring stabilization during high-speed rotation of the optical disk M.
- the base part 80 constituting the optical disc apparatus 1 or the traverse mechanism 5 for example, a pair of supports 91 and 92 on which the OPU 100 is movably mounted, a drive apparatus 40 having a spindle motor 71, a turntable 73, and the like.
- the substantially flat chassis 80 to which is attached is used.
- the chassis means a built-in table on which, for example, components are mounted.
- the optical disc apparatus 1 includes the traverse mechanism 5 having the OPU 100, the slide shafts 91 and 92, the disc drive apparatus 40, and the chassis 80.
- the optical disk device 1 and the traverse mechanism 5 constituting the disk device 1 are configured to include other components in addition to the various components described above, but detailed description of the other components is omitted here.
- the pair of magnetic members 171 and 176 (FIGS. 2 and 8) and the set of fixing members 180 constitute a fixing portion 195 of the driving device 190 (FIG. 8) of the OPU 100.
- the driving device 190 (FIGS. 7 and 8) of the OBLs 131 and 132 of the OPU 100 (FIGS. 1, 2 and 9) is configured as, for example, an actuator 190 including the fixed portion 195 and the movable portion 191.
- the optical member holding member 140 (FIG. 7) is configured by attaching two OBLs 131 and 132, a total of six coils 151, 151, 152, 152, 153, 153, and the like to each pair of front and rear.
- the driving main body 193 is, for example, a lens holder assembly 193.
- Information is recorded on the optical disc M (FIG. 9) by a laser beam emitted from an optical member (not shown) that constitutes the light emitting element when current is supplied to an optical member (not shown) constituting the light emitting element.
- the information recorded on the optical disc M is reproduced, or the information recorded on the optical disc M is erased.
- the light emitting element include a semiconductor laser.
- the OPU 100 shown in FIG. 1, FIG. 2 and FIG. 9 includes an optical member so-called laser diode (LD) (not shown) that irradiates the optical disc M (FIG. 9) with laser light.
- the OPU 100 also includes a drive circuit unit so-called a laser driver (LDD: LD driver) (not shown) that causes the LD to emit light by flowing electricity to the LD.
- the OPU 100 includes a flexible substrate (not shown) such as a flexible flat circuit body and a flexible printed circuit body that connect an electrical system component such as an LD and an electrical system component such as an LDD so that energization is possible.
- the flexible flat circuit body flexible flat circuit / flexible flat cable
- FPC flexible printed circuit body
- a laser beam of 0.2 to 1000 mW (milliwatt) for “CD” capable of emitting an infrared laser beam having a wavelength of about 765 to 840 nm (nanometer) and a reference wavelength of about 780 nm is emitted from the LD. Is done.
- a laser beam of 0.2 to 1000 mW for “DVD” capable of emitting a red laser beam having a wavelength of about 630 to 685 nm and a reference wavelength of about 635 nm or 650 nm is emitted from the LD.
- the LD includes, for example, a first wavelength laser beam having a reference wavelength of approximately 780 nm and a wavelength of approximately 765 to 840 nm, and a second wavelength having a reference wavelength of approximately 635 nm or 650 nm and a wavelength of approximately 630 to 685 nm. And a two-wavelength LD capable of emitting a wavelength laser beam.
- the wavelength is about 340 to 450 nm, preferably about 380 to 450 nm, more preferably more than about 400 nm to 450 nm or less, and the reference wavelength is about 405 nm.
- Laser light of 0.2 to 1000 mW for “CBHD”, “HD DVD”, and “Blu-ray / Blu-ray Disc” capable of emitting laser light is emitted from the LD.
- the LD has, for example, a first wavelength laser beam having a reference wavelength of about 780 nm and an emission wavelength of about 765 to 840 nm, a reference wavelength of about 635 nm or 650 nm, and an emission wavelength of It is possible to emit laser beams of a plurality of types of wavelengths: a second wavelength laser beam of approximately 630 to 685 nm and a third wavelength laser beam having a reference wavelength of approximately 405 nm and an emission wavelength of approximately 340 to 450 nm. It is configured as a special LD. Further, as the LD, various LDs such as a single wavelength LD capable of emitting the laser light of each wavelength can be used. Further, as the LD, an LD capable of emitting laser light having at least one of the above wavelengths can be used.
- Laser light with an output value of, for example, 0.2 to 1000 mW, specifically 0.5 to 800 mW is emitted from the LD.
- the laser light has an output value of less than 0.2 mW
- the amount of laser light that is reflected after reaching the optical disc M and reaches a light receiving element (not shown) is insufficient.
- a laser beam with an output value of several to several tens of mW for example, 0.2 mW or more, preferably 0.5 mW or more and 20 mW or less is sufficient.
- a laser beam having an output value of several tens to several hundreds mW is required.
- a pulse laser beam having a high output value of more than 20 mW, specifically 200 mW, 400 mW, 600 mW, 800 mW, 1000 mW, or the like may be required.
- the mounting structure of the optical element 10 includes an optical element 10, an elastic member 30 used when the optical element 10 is equipped, and a holding unit equipped with the optical element 10 and the elastic member 30. 120.
- the elastic member 30 is press-fitted into the holding unit 120, and the optical element 10 is provided in the holding unit 120 by the elastic member 30.
- the optical element 10 is formed in a substantially rectangular plate shape in front view through which light can be transmitted.
- the elastic member 30 is formed in a substantially concave shape in front view through which light can pass.
- the holding part 120 is formed using resin.
- the elastic member 30 is formed using metal.
- the optical element 10 is a diffraction grating 10 that divides incident light into a plurality of pieces.
- the first wavelength laser beam and the second wavelength laser beam emitted from the LD are main beams (0th order) by an optical element 10 so-called diffraction grating 10 divided into a plurality of region parts 11, 12, 13, and 14 such as four parts.
- Light and two sub-beams ( ⁇ first-order diffracted light beams).
- the optical element 10 When the optical element 10 is installed in the holding unit 120, the optical element 10 is provided in the holding unit 120 by the elastic member 30 installed in the holding unit 120. Since the elastic member 30 is press-fitted into the holding portion 120, for example, when the mounting position of the optical element 10 mounted on the holding portion 120 together with the elastic member 30 is adjusted, the elastic member 30 is inadvertently shifted, Accordingly, for example, it is avoided that the position adjustment of the optical element 10 is performed inaccurately. Therefore, the optical element 10 can be accurately provided in the holding unit 120.
- the elastic member 30 is an elastic member 30 used when the optical element 10 is mounted on the holding unit 120 while being aligned. Press-fit fixing portions 36 and 37 for positioning and fixing the elastic member substrate portion 33 with respect to the holding portion 120 are provided.
- the elastic member substrate portion 33 is formed in a substantially plate shape.
- the press-fit fixing portions 36 and 37 are projecting portions 36 and 37 that project from the left and right side portions 33L and 33R in the front view of the elastic member substrate portion 33.
- the press-fit fixing portion 36 has inclined surface portions 36 a and 36 b that allow the elastic member substrate portion 33 to be detachably mounted on the holding portion 120.
- the press-fit fixing portion 37 includes inclined surface portions 37 a and 37 b that allow the elastic member substrate portion 33 to be detachably mounted on the holding portion 120.
- contact force generating portions 31 and 32 that generate a restoring elastic force with respect to the optical element 10 and the holding portion 120 are extended to the elastic member substrate portion 33.
- the contact force generating portions 31 and 32 are folded back with respect to the elastic member substrate portion 33.
- the elastic member 30 having the above configuration is used as the elastic member 30.
- the optical element 10 When the optical element 10 is mounted on the holding unit 120 while being aligned, the optical element 10 is provided in the holding unit 120 by the elastic member 30 mounted on the holding unit 120. Further, since the elastic member base plate 33 is provided with press-fit fixing portions 36 and 37 for positioning and fixing with respect to the holding portion 120, for example, the mounting position of the optical element 10 mounted on the holding portion 120 together with the elastic member 30 is adjusted. In doing so, it is avoided that the elastic member 30 is inadvertently shifted, and accordingly, for example, the position adjustment of the optical element 10 is performed incorrectly. Therefore, the optical element 10 can be accurately provided in the holding unit 120.
- the protrusions 36 and 37 are provided on the left and right side portions 33L and 33R in the front view of the elastic member substrate portion 33 of the elastic member 30 so that the horizontal position when the elastic member 30 is attached to the holding portion 120 can be obtained.
- the positional adjustment of the optical element 10 prevents the elastic member 30 from being laterally displaced when the optical element 10 is moved in the left-right direction DLR from the initial mounting position. Therefore, as a result, the contact position between the optical element 10 and the elastic member 30 is always stabilized. Accordingly, the stability and reliability of the initial performance in the mounting structure of the optical element 10 can be improved.
- the press-fitting fixing portions of the left and right side portions 33L / 33R of the spring substrate 33 constituting the elastic member 30 when viewed from the front are formed on 36/37 so that the elastic member 30 can be easily attached to and detached from the holding portion 120.
- inclined surface portions 36a, 36b / 37a, 37b are formed on the press-fit fixing portions 36/37 of the left and right side portions 33L / 33R in the front view of the spring base plate portion 33 constituting the elastic member 30, for example, press-fit having a substantially tapered shape.
- the pickup device 100 has a mounting structure for the optical element 10.
- the position of the optical element 10 is accurately adjusted to the holding portion 120 by the elastic member 30 and provided. Therefore, the pickup device 100 having excellent optical characteristics can be configured.
- the OPU 100 having the mounting structure of the optical element 10 includes an optical element 10 that divides incident laser light into a plurality of optical elements 10 and an optical element. 10 and the optical element elastic member 30 used when mounting the optical element 10 on the optical element holding portion 120 of the housing 110, and the optical element 10 and the optical element elastic member 30 inserted and mounted. And an optical element holding portion 120 having a portion 129.
- the optical element 10 is formed as a so-called grating 10, a diffraction grating 10 having a substantially rectangular plate shape in front view for emitting incident laser light divided into a plurality of parts.
- a diffraction grating spring 30 is used as the optical element elastic member 30.
- a diffraction grating holder 120 is used as the optical element holding unit 120.
- a substantially rectangular box-like accommodating chamber 129 having a substantially concave shape in front view constituting the diffraction grating holder 120 is used as the accommodating portion 129 constituting the optical element holding portion 120.
- the diffraction grating holder 120 includes a substrate portion 110A that constitutes the housing 110, and side plate portions 123A, 123B, 123C, and 123D that are erected substantially perpendicular to the substrate portion 110A.
- a second side plate portion 123B is disposed substantially parallel to the first side plate portion 123A and facing the first side plate portion 123A.
- a third side plate portion 123C and a fourth side plate portion 123D are arranged substantially orthogonal to the first side plate portion 123A and the second side plate portion 123B.
- a fourth side plate portion 123D is disposed substantially parallel to the third side plate portion 123C so as to face the third side plate portion 123C.
- the diffraction grating spring 30 is detachably press-fitted into the accommodation chamber 129 of the diffraction grating holder 120 and the diffraction grating spring 30 is mounted when the diffraction grating 10 is installed in the accommodation chamber 129 of the diffraction grating holder 120. Due to the restoring elastic force generated in the deflected elastic deflecting pieces 31 and 32, the diffraction grating 10 is substantially along the left-right direction DLR and / or the up-down direction DDU and / or the rotation direction in the accommodation chamber 129 of the diffraction grating holder 120. The mounting position can be adjusted and elastically held with high precision.
- the diffraction grating 10 is formed in a substantially rectangular plate shape in front view that is transparent or translucent to transmit laser light.
- the spring substrate portion 33 of the diffraction grating spring 30 is formed in a substantially concave shape in front view through which laser light can pass without being applied.
- the spring substrate portion 33 of the diffraction grating spring 30 is cut out in a substantially semi-oval shape, and a laser beam transmitting portion 35 having a substantially semi-oval shape is formed in the spring substrate portion 33 of the diffraction grating spring 30.
- the spring base portion 33 of the diffraction grating spring 30 is cut out in a substantially semi-oval shape.
- the elastic bending pieces 31 and 32 are elastically bent. The width is gradually narrowed from the bent portions 31b and 32b substantially corresponding to the bases of the pieces 31 and 32 to the substantially semicircular tip portions 31a and 32a.
- the diffraction grating holder 120 is formed in a substantially concave shape when viewed from the front without being irradiated with laser light.
- the first side plate portion 123A of the diffraction grating holder 120 is cut out in a substantially concave shape, and a substantially concave first laser light transmitting portion 125B is formed in the first side plate portion 123A of the diffraction grating holder 120.
- the second side plate portion 123B of the diffraction grating holder 120 is cut out in a substantially concave shape, and a substantially concave second laser light transmitting portion 125B is formed in the second side plate portion 123B of the diffraction grating holder 120. .
- the first side plate portion 123 ⁇ / b> A and the second side plate portion 123 ⁇ / b> B of the holder 120 are cut out in a substantially concave shape.
- the diffraction grating holder 120 is formed using a synthetic resin.
- the diffraction grating spring 30 including the protruding press-fit fixing portions 36 and 37, the elastic deflecting pieces 31 and 32, and the spring base plate portion 33 is formed using metal.
- the diffraction grating 10 is formed using synthetic resin or glass.
- the housing 110 that constitutes the OPU 100 and has the diffraction grating holder 120 is excellent in electrical characteristics such as mechanical characteristics, sliding characteristics, dimensional stability, heat resistance, injection moldability, insulation characteristics, and the like, and further, iron materials, etc. It is formed using a heat-resistant synthetic resin composition based on polyarylene sulfide (PAS) resin such as polyphenylene sulfide (PPS) resin that can be reduced in weight. Is done.
- PAS polyarylene sulfide
- PPS polyphenylene sulfide
- the resin material has a smaller specific gravity than iron and is suitable for weight reduction.
- composition based on PPS examples include DIC (DIC, former name: Dainippon Ink and Chemicals): DIC (registered trademark).
- DIC former name: Dainippon Ink and Chemicals
- DIC registered trademark
- DIC / PPS FZ-2100 manufactured by DIC, which is a non-reinforced linear PPS
- DIC which is a linear PPS reinforced with 30% glass fiber
- DIC / PPS FZ-2130 manufactured by DIC
- DIC / PPS FZ-1140-D9 manufactured by DIC, which is a cross-linked PPS reinforced with 40% glass fiber
- a molded body formed of a linear PPS (linear PPS) composition has, for example, large elongation and good toughness.
- the molded body formed of the crosslinked PPS composition has a higher elastic modulus than the molded body formed of, for example, a linear PPS composition.
- the molded body formed from the semi-crosslinked PPS composition includes, for example, both the characteristics of the molded body formed from the linear PPS composition and the characteristics of the molded body formed from the crosslinked PPS composition. It also has the characteristics of
- the housing 110 constituting the OPU 100 is made of, for example, a metal such as a non-ferrous metal or a die-cast alloy containing at least one element selected from the group consisting of aluminum (Al), magnesium (Mg), and zinc (Zn). Used to form. Aluminum, magnesium, and zinc are excellent in corrosion resistance and are non-ferrous metals having a specific gravity smaller than that of iron.
- the housing 110 is formed using a non-ferrous metal material such as an aluminum alloy containing aluminum as a main component.
- a non-ferrous metal material such as an aluminum alloy containing aluminum as a main component is generally softer than a steel-based metal material
- Projection of the left and right side portions 33L / 33R of the spring base plate 33 constituting the steel diffraction grating spring 30 on the left and right side wall portions 123C and 123D constituting the accommodation chamber 129 of the diffraction grating holder 120 of the aluminum housing 110 Part 36/37 will bite.
- the diffraction grating leaf spring 30 and the like are formed using, for example, a metal material.
- a thin die steel plate such as a rolled steel plate (none of which is shown) is subjected to press mold forming processing such as punching, bending, and pressing.
- press mold forming processing such as punching, bending, and pressing.
- the leaf spring 30 and the like are formed.
- a metal material plate mainly composed of iron such as a rolled steel plate is used, and the leaf spring 30 and the like are punched / bent formed by a press molding machine (none of which is shown).
- the metal material plate mainly composed of iron include various stainless steel plates, rolled steel plates, and strip steel.
- a metal material constituting the leaf spring 30 or the like for example, a metal material having a “spring limit value” based on “JIS G 4313” equal to or greater than a predetermined value is used.
- the “spring limit value” is, for example, a stress at a boundary where a repeated load is applied and permanent deformation occurs or does not occur. More specifically, as a metal material constituting the leaf spring 30 or the like, for example, a “spring limit value” based on “JIS G 4313” is at least about 200 N / mm 2 (Newton per square millimeter), preferably about A metal material of 300 N / mm 2 or more is used.
- the lower limit value of the “spring limit value” of the metal material constituting the leaf spring 30 or the like is, for example, approximately 200 N / mm 2 , preferably approximately 300 N / mm 2 .
- the upper limit value of the “spring limit value” is about 2000 N / mm 2 , for example, and about 1500 N / mm 2, depending on the material, but is not limited to these.
- the spring limit value test of the stainless steel strip for spring is based on, for example, a repeated deflection test and / or a moment test of “JIS H 3130”.
- the spring limit value of SUS301-CSP (refining symbol 1 / 2H) in the cold rolling state based on “JIS G 4313” is approximately 315 N / mm 2 or more, and SUS301-CSP (refining symbol 3 / 4H).
- the spring limit value is substantially 390 N / mm 2 or more
- the spring limit value of SUS301-CSP (temper symbol H) is approximately 490 N / mm 2 or more
- the limit value is approximately 590 N / mm 2 or more
- the spring limit value of SUS301-CSP (refining symbol SEH) is approximately 650 N / mm 2 or more.
- the spring limit value of SUS304-CSP (refining symbol 1 / 2H) in the cold rolling state based on “JIS G 4313” is approximately 275 N / mm 2 or more, and SUS304-CSP (tempering symbol 3 / The spring limit value of 4H) is approximately 335 N / mm 2 or more, and the spring limit value of SUS304-CSP (refining symbol H) is approximately 390 N / mm 2 or more.
- the spring limit value of SUS632J1-CSP (refining symbol 3 / 4H) in the precipitation hardening heat treatment state based on “JIS G 4313” is about 1400 N / mm 2 or more.
- the leaf spring 30 and the like are formed using, for example, a stainless steel plate or a stainless steel strip that is a metal material having excellent corrosion resistance.
- a stainless steel strip for springs austenitic SUS301-based SUS301-CSP and SUS304-based SUS304-CSP, martensitic SUS420-based SUS420J2-CSP, precipitation hardening, defined based on “JIS G 4313” Examples thereof include SUS631-type SUS631-CSP and SUS632-type SUS632J1-CSP.
- CSP cold spring plate
- CSP cold spring plate
- the stainless material include austenitic stainless steel (eg, SUS301) that contains about 16 to 18% of chromium (Cr) and about 6 to 8% of nickel (Ni) and has excellent workability. It is done. Further, as a specific stainless steel material, austenitic stainless steel containing about 13 to 19% of chromium (Cr) and containing a small amount of sulfur (S) and phosphorus (P) and having excellent free-cutting properties (eg, SUS303). System) and the like. As a specific stainless steel material, austenitic stainless steel containing about 18 to 20% chromium (Cr) and about 8 to 10.5% nickel (Ni) is made non-magnetic and has excellent corrosion resistance.
- austenitic stainless steel eg, SUS301
- austenitic stainless steel containing about 13 to 19% of chromium (Cr) and containing a small amount of sulfur (S) and phosphorus (P) and having excellent free-cutting properties
- austenitic stainless steel is non-magnetic, if an austenitic stainless steel material is used to form the diffraction grating leaf spring 30 or the like, for example, the OPU 100 or the like may be adversely affected by magnetism. Avoided.
- the SUS304 type is called chromium-nickel type stainless steel because it contains chromium (Cr) and nickel (Ni).
- Austenitic stainless steel (for example, SUS301 series), which is a kind of stainless steel for springs, is used to form a thin plate spring 30 for a diffraction grating and the like.
- the leaf spring 30 or the like is formed using, for example, a metal material that can be used as a conductor used to release static electricity, noise, or the like.
- a metal material that can be used as a conductor used to release static electricity, noise, or the like Specifically, a phosphor bronze plate material that is excellent in strength, spring characteristics, corrosion resistance, etc. and can be used as a conductor is subjected to stamping, bending, or other press work, and a plate spring 30 having a substantially plate shape or the like. Is press-molded.
- a metal material plate mainly composed of copper is used, and a plate spring 30 or the like having a substantially flat plate shape is punched and formed by a press molding machine or the like.
- a metal material mainly composed of copper (Cu) for example, a copper alloy containing about 3.5 to 9% tin (Sn) and about 0.03 to 0.5% phosphorus (P) is used. Is preferred. Specifically, a copper alloy containing copper (Cu) as a main component, tin (Sn) about 7 to 9%, and phosphorus (P) about 0.03 to 0.35%, for example, strength, “Spring phosphor bronze” having good spring characteristics, fatigue resistance, corrosion resistance and the like may be used. Examples of the phosphor bronze plate material for spring include C5210 (C5210P) and C5212 (C5212P) defined based on “JIS H3130”.
- the diffraction grating spring 30 is configured as a diffraction grating spring 30 that is used when the diffraction grating 10 is mounted in the housing chamber 129 of the diffraction grating holder 120 of the housing 110 while being accurately aligned.
- Press-fit fixing portions 36 and 37 for positioning and fixing with respect to the diffraction grating holder 120 are provided on the spring substrate portion 33 constituting the diffraction grating spring 30.
- the spring substrate portion 33 of the diffraction grating spring 30 is formed in a substantially plate shape having a substantially rectangular concave shape when viewed from the front.
- the press-fit fixing portions 36 and 37 of the diffraction grating spring 30 are formed as a pair of projecting portions 36 and 37 projecting in a substantially trapezoidal shape on the left and right side portions 33L and 33R in the front view of the spring base plate 33.
- press-fit fixing portions 36/37 of the diffraction grating spring 30 are a pair of left / right / top / bottom in a front view that allows the spring base portion 33 of the diffraction grating spring 30 to be easily detachably mounted on the diffraction grating holder 120.
- the first press-fit fixing part 36 on the right side of the diffraction grating spring 30 is a front surface that allows the spring base part 33 of the diffraction grating spring 30 to be easily detachably mounted on the diffraction grating holder 120. It is formed as a protruding portion 36 having a pair of gently tapered surface portions 36a and 36b.
- the first press-fit fixing portion 36 on the right side of the diffraction grating spring 30 is located between the pair of upper and lower gentle tapered surface portions 36a and 36b and the pair of upper and lower gentle tapered surface portions 36a and 36b, and is located on the right side in the front view of the spring base plate portion 33. It is formed as a protruding portion 36 that protrudes in a substantially trapezoidal shape in a front view having a sliding contact surface portion 36c substantially parallel to the surface portion 33Ra.
- the second press-fit fixing portion 37 on the left side of the diffraction grating spring 30 can be easily mounted on the diffraction grating holder 120 so that the spring base 33 of the diffraction grating spring 30 can be easily attached and detached. It is formed as a protruding portion 37 having a pair of gently tapered surface portions 37a and 37b.
- the second press-fit fixing portion 37 on the left side of the diffraction grating spring 30 is located between the pair of upper and lower gentle tapered surface portions 37a and 37b and the pair of upper and lower gentle tapered surface portions 37a and 37b, and is a left side in front view of the spring base plate portion 33. It is formed as a protruding portion 37 that protrudes in a substantially trapezoidal shape when viewed from the front, having a slidable contact surface portion 37c substantially parallel to the surface portion 33La.
- the inclination angle of the pair of gently tapered surface portions 36a, 36b on the right side of the front surface of the spring substrate 33 is relative to the left and right side surfaces 33Ra of the spring substrate 33 viewed from the front.
- the obtuse angle is about 135 degrees to less than about 180 degrees, preferably about 150 degrees to about 175 degrees, more preferably about 160 degrees to about 170 degrees.
- the inclination angle of the pair of upper and lower gentle tapered surface portions 37 a and 37 b on the left side of the front surface of the spring substrate portion 33 is the same as that of the left and right side surfaces 33 La of the spring substrate portion 33.
- an obtuse angle of about 135 degrees to less than about 180 degrees preferably an obtuse angle of about 150 degrees to about 175 degrees, more preferably an obtuse angle of about 160 degrees to about 170 degrees.
- the pair of gentle tapered surface portions 36a, 36b / 37a, 37b in the left / right / top / bottom direction when viewed from the front is not formed. Further, even when the inclination angle is set to a large value exceeding, for example, about 175 degrees according to the specifications of the diffraction grating spring 30, etc., a pair of gentle tapered surface portions 36a, 36b / 37a, 37b in the left / right / top / bottom view are formed. Concern is difficult.
- the diffraction grating spring 30 can be inserted into the accommodation chamber 129 of the diffraction grating holder 120. There is concern that it will be difficult to do. Further, even when the inclination angle is set to a small value of, for example, less than about 150 degrees according to the specifications of the diffraction grating spring 30, the diffraction grating spring 30 is inserted into the accommodation chamber 129 of the diffraction grating holder 120, for example. There is concern that it will be difficult to do.
- the diffraction grating spring 30 is inserted into the accommodation chamber 129 of the diffraction grating holder 120, for example. There is a concern that it will not be possible.
- the protrusion amount of the protrusions 36/37 protruding in a substantially trapezoidal shape to the left and right side portions 33L / 33R in the front view of the spring substrate portion 33 having a thickness of 30 t of approximately 0.1 mm (millimeters) is the spring substrate portion 33.
- the protrusion amount of the protrusions 36/37 is set to a small value, for example, less than about 0.02 mm, for example, the diffraction grating spring 30 is not securely mounted in the accommodation chamber 129 of the diffraction grating holder 120, and the diffraction grating There is a concern that the diffraction grating spring 30 freely moves within the storage chamber 129 of the holder 120 for use. If the protruding amount of the protruding portion 36/37 is set to a large value exceeding, for example, about 0.5 mm, there is a concern that the diffraction grating spring 30 cannot be inserted into the accommodation chamber 129 of the diffraction grating holder 120, for example. Is done.
- the protruding amount of the protruding portion 36/37 with respect to the left and right side surface portions 33La / 33Ra in the front view of the spring base plate portion 33 is preferably about 0.05 to 0.2 mm.
- the protrusion amount of the protrusions 36/37 with respect to the left and right side surfaces 33La / 33Ra in front view of the spring base plate 33 is the thickness 30t of the diffraction grating spring 30 including the spring base plate 33 and the elastic deflecting pieces 31, 32.
- the spring base plate portion 33 is a spring that comes into contact with the aligned diffraction grating 10 when the diffraction grating 10 is installed in the accommodation chamber 129 of the diffraction grating holder 120 while accurately aligning it, and after the OPU 100 is assembled.
- a substrate portion 33 is provided.
- a pair of substantially tongue-shaped elastic deflecting pieces 31 and 32 that generate a restoring elastic force with respect to the diffraction grating 10 and the diffraction grating holder 120 are extended to the spring base plate 33.
- a substantially flat plate-like metal material constituting the diffraction grating spring 30 is folded back into a substantially inverted V shape in side view at the bent portions 31b and 32b, and a pair of substantially tongue-shaped elastic flexible pieces 31 and 32 extends substantially along the direction away from the spring base plate 33, for example.
- the elastic deflecting pieces 31 and 32 of the diffraction grating spring 30 including the spring base plate 33 and the elastic deflecting pieces 31 and 32 are in a natural state, the curved portions 31c of the elastic deflecting pieces 31/32 that are bent approximately gently.
- the substantially oval tip 31a / 32a beyond / 32c is substantially parallel to the spring base plate 33.
- a pair of substantially tongue-shaped elastic bending pieces 31 and 32 are folded back with respect to the spring base plate 33, and the diffraction grating spring 30 is formed, for example, in a substantially inverted J shape that is inverted in a side view.
- the spring base plate 33 is in contact with the diffraction grating 10, and the curved portion 31 c / 32 c of the elastic bending piece 31/32 is in contact with the inside of the accommodation chamber 129 of the diffraction grating holder 120.
- the elastic deflecting pieces 31 and 32 substantially overlap the substantially upper half of the spring substrate portion 33 on which the substantially U-shaped laser beam transmitting portion 35 is formed, for example.
- the first elastic bending piece 31 gradually increases from the folded portion 31b substantially corresponding to the substantially base of the elastic bending piece 31 to the substantially semicircular tip portion 31a. The width is narrowed.
- the first elastic bending piece 32 gradually increases from the bent portion 32b substantially corresponding to the substantially root of the elastic bending piece 32 to the substantially semicircular tip portion 32a. The width is narrowed.
- the elastic deflection is extended in a direction away from the spring base plate 33 with the substantially inverted V-shaped folded portions 31b and 32b as base points.
- the piece 31/32 is bent approximately gently at the approximate center of the elastic bending piece 31/32 to form a gently curved portion 31c / 32c in the elastic bending piece 31/32, and the elastic bending piece 31/32 ahead of it. 32 extends substantially parallel to the spring base plate 33.
- the elastic bending piece 31/32 extending in a direction away from the spring base plate 33 with the substantially inverted V-shaped folded bent portions 31b and 32b of the diffraction grating spring 30 viewed from the side as a base point is an elastic bending piece. It extends in a direction approaching the spring base plate portion 33 with a gentle curved portion 31c / 32c at the approximate center of 31/32 as a boundary.
- a diffraction grating including a spring base plate 33 having a thickness 30t of approximately 0.1 mm and elastic deflecting pieces 31 and 32.
- the amount of bending of the elastic bending pieces 31 and 32 when the elastic bending pieces 31 and 32 of the spring 30 are bent from the natural state toward the spring substrate 33 is, for example, approximately 0.1 to 0.5 mm.
- the amount of bending of the elastic bending pieces 31 and 32 toward the spring base plate 33 is set to a small value, for example, less than about 0.1 mm, for example, the restoring elastic force generated in the elastic bending pieces 31 and 32 of the diffraction grating spring 30 is reduced. There is concern about the shortage.
- the amount of bending of the elastic bending pieces 31 and 32 toward the spring base plate 33 is a large value exceeding, for example, about 0.5 mm, for example, the restoring elastic force generated in the elastic bending pieces 31 and 32 of the diffraction grating spring 30 is, for example.
- the position of the diffraction grating 10 becomes difficult to be adjusted because it becomes too large.
- the amount of bending of the elastic bending pieces 31 and 32 toward the spring base plate portion 33 is, for example, about 0.2 to 0.4 mm.
- the elastic bending pieces 31 and 32 of the diffraction grating spring 30 are bent toward the spring substrate portion 33 from the natural state, the bending amounts of the elastic bending pieces 31 and 32 are the spring substrate portion 33 and the elastic plate.
- the thickness of the diffraction grating spring 30 including the deflecting pieces 31 and 32 is approximately 1 to 5 times, preferably approximately 2 to 4 times the thickness 30t.
- a diffraction grating spring 30 having the above-described form is used as the leaf spring 30.
- the OPU 100 has a structure for attaching the diffraction grating 10.
- the diffraction grating 10 is accurately positioned by the diffraction grating spring 30 and provided in the diffraction grating holder 120 of the housing 110. Therefore, the OPU 100 having excellent optical characteristics is configured.
- the diffraction grating 10 When the diffraction grating 10 is installed while being aligned in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110, the diffraction grating 10 is installed together in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110.
- the mounting position can be adjusted substantially along the left-right direction DLR and / or the up-down direction DDU and / or the rotation direction by the restoring elastic force generated in the bent elastically deforming pieces 31, 32 of the diffraction grating spring 30.
- the housing 110 of the diffraction grating holder 120 of the housing 110 it is elastically held with high precision.
- press-fit fixing portions 36 and 37 for positioning and fixing to the diffraction grating holder 120 are provided on the spring substrate portion 33 constituting the diffraction grating spring 30, and the accommodation chamber 129 of the diffraction grating holder 120 is provided for the diffraction grating. Since the spring 30 is detachably press-fitted and fixed, for example, the mounting position of the diffraction grating 10 mounted together with the diffraction grating spring 30 in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110 is set in the left-right direction DLR and / or the vertical direction.
- the diffraction grating spring 30 When adjusted substantially along the direction DDU and / or the rotational direction, the diffraction grating spring 30 is inadvertently left and right in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110 and / or the vertical DDU. And / or shifted substantially along the direction of rotation, and as a result, for example, the position adjustment of the diffraction grating 10 is performed incorrectly. Occurrence of a problem that is is avoided. Accordingly, the diffraction grating 10 is elastically held with high precision in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110.
- a pair of projecting portions 36 and 37 projecting in a substantially trapezoidal shape are provided on the left and right side portions 33L and 33R in the front view of the spring base plate portion 33 of the diffraction grating spring 30, so that the diffraction grating holder 120 of the housing 110 is provided.
- the contact position between the diffraction grating 10 and the diffraction grating spring 30 is always stabilized. Accordingly, the stability of the initial performance is improved in the mounting structure of the diffraction grating 10, and the diffraction grating 10 is also used for reliability evaluation in a heat shock test (heat shock (H / S)). Is improved.
- the protruding shapes of the protruding portions 36 and 37 of the diffraction grating spring 30 are taken into consideration when the diffraction grating spring 30 and / or the diffraction grating 10 is attached to and detached from the diffraction grating holder 120 of the housing 110 during attachment and repair.
- a pair of loosely tapered surface portions 36a, 36b / 37a, 37b in front left / right / up / down are formed on the protrusions 36/37 of the left / right side portions 33L / 33R of the spring base plate 33 constituting the diffraction grating spring 30.
- the protrusions 36/37 are formed in a substantially tapered shape so that the diffraction grating spring 30 can be detachably and easily attached to the diffraction grating holder 120 of the housing 110.
- a pair of gently tapered surface portions 36a, 36b / 37a, 37b in the front left / right / upper / lower direction are provided on the protrusions 36/37 of the left / right both sides 33L / 33R of the spring base plate 33 constituting the diffraction grating spring 30.
- the protrusions 36/37 having a substantially tapered shape, for example, are provided on the left and right side portions 33L / 33R of the spring base plate 33 constituting the diffraction grating spring 30 so that the diffraction grating of the housing 110 is formed.
- the metal spring 30 bites into the diffraction grating holder 120 of the so-called plastic housing 110 made of resin. The effect of preventing the displacement of the spring 30 is also expected.
- a bonding member / adhesive is used to The diffraction grating holder 120 and / or the diffraction grating spring 30 are securely fixed in the accommodation chamber 129 of the 110 diffraction grating holders 120.
- the diffraction grating spring 30 and / or the diffraction grating 10 are detachably mounted on the diffraction grating holder 120 of the housing 110, but the bonding member / adhesive is applied. After fixing, the diffraction grating spring 30 and / or the diffraction grating 10 are detachably mounted on the diffraction grating holder 120 of the housing 110.
- the diffraction surface 10a of the diffraction grating 10 will be described in detail.
- the diffraction surface portion 10a of the diffraction grating 10 includes a diffraction surface portion 10a that divides the first laser wavelength light into at least one first main beam and two first sub beams, and a second laser wavelength.
- the diffractive surface portion 10a that divides light into at least one second main beam and two second sub beams is formed as one surface portion 10a corresponding to the diffraction of a plurality of types of laser wavelength light.
- the diffractive surface portion 10a of the diffraction grating 10 has a fine periodic repeating periodic structure.
- the back surface portion on the opposite side of the diffractive surface portion 10a is formed, for example, as a smooth surface portion without forming a fine irregular repeating periodic structure on the back surface portion on the opposite side of the diffractive surface portion 10a constituting the diffraction grating 10. .
- An OPU 100 is configured.
- the diffraction surface portion 10a of the diffraction grating 10 diffracts the first laser wavelength light into at least one first main beam and two first sub beams, and the second laser wavelength light at least one second. If it is formed as one surface portion 10a corresponding to the diffraction of a plurality of types of laser wavelength light, which also serves as the diffractive surface portion 10a divided into the main beam and the two second sub-beams,
- the main beam and the first sub beam are unnecessarily diffracted to reduce the efficiency of the first main beam and the first sub beam of the first laser wavelength light, or the second laser wavelength light is unnecessarily diffracted to the second laser wavelength. It is avoided that the efficiency of light is reduced.
- the diffractive surface portion 10a that divides the first laser wavelength light into at least one first main beam and two first sub beams, and the second laser wavelength light at least one second main beam and two first sub beams.
- the diffraction surface portion 10a of the diffraction grating 10 is formed as one surface portion 10a corresponding to the diffraction of a plurality of types of laser wavelength light that also serves as the diffraction surface portion 10a divided into two sub-beams.
- a reduced diffraction grating 10 is constructed. Since the processing portion, processing man-hours, and the like of the diffraction grating 10 are reduced, the price of the diffraction grating 10 can be kept low. Along with this, it becomes possible to configure the OPU 100 that can keep the price low.
- the diffraction grating 10 is provided with phase shift regions 11 and 14 that generate a phase shift of ⁇ radians in a part of the laser light emitted from the LD.
- the diffraction grating 10 includes a substantially rectangular first region portion 11, a substantially linear second region portion 12 adjacent to the first region portion 11, and a substantially linear third region adjacent to the second region portion 12.
- the region 13 is divided into at least four region portions 11, 12, 13, and 14, which are a substantially rectangular fourth region portion 14 adjacent to the third region portion 13.
- the diffraction grating 10 is divided into a plurality of region portions 11, 12, 13, and 14.
- a predetermined periodic structure is configured in each of the region portions 11, 12, 13, and 14.
- the second region portion 12 and the third region portion 13 are drawn with a certain width for convenience. Yes.
- the second region portion 12 of the diffraction grating 10 and the third region portion 13 of the diffraction grating 10 have a thin line shape with a width 10w of about 20 to 200 ⁇ m, for example.
- the periodic structure of each of the region portions 11, 12, 13, and 14 that constitute the diffraction grating 10 is a fine periodic repeating periodic structure.
- the diffraction grating 10 is, for example, a glass plate or a plastic plate having a length of about 3 to 10 mm square and a thickness of about 0.3 to 5 mm.
- the error signal of the OPU 100 for the signal surface portion Ma of the medium M can be easily detected. For example, tracking of the OPU 100 with respect to the signal surface portion Ma of the medium M is easily performed favorably. Since the diffraction grating 10 is divided into a plurality of region portions 11, 12, 13, and 14, the signal surface portion Ma of the medium M is irradiated with at least three independent condensing spots. Since at least three focused spots are independently irradiated on the signal surface portion Ma of the medium M, an error signal such as a tracking error signal is recorded at the time of recording / playback of two or more kinds of media M having different track pitches. It is easy to avoid a decrease in the detection accuracy. Therefore, it is possible to provide the OPU 100 that is easily subjected to tracking control.
- the diffraction grating 10 is divided into even-numbered area portions 11, 12, 13, and 14.
- the condensing spot formed on the signal surface portion Ma of the medium M is formed as a highly accurate condensing spot.
- the diffraction grating 10 is at least bisected into one region 18 including the region 12 and the other region 19 including the third region 13 and the fourth region 14 adjacent to the third region 13.
- the OPU 100 when the OPU 100 is equipped with the diffraction grating 10, the light applied to the diffraction grating 10 is transmitted to one region portion 18 of the diffraction grating 10 and the other region portion 19 of the diffraction grating 10. In addition, it becomes easy to be applied to a state of being almost equally divided.
- the diffraction grating 10 can be applied to the OPU 100 with high accuracy because the light is easily applied to one of the area portions 18 of the diffraction grating 10 and the other area portion 19 of the diffraction grating 10. It becomes easy to be provided. Therefore, it is easy to form a focused spot on the signal surface portion Ma of the medium M with high accuracy.
- the detection accuracy of error signals such as tracking error signals at the time of recording / reproducing of two or more types of media M having different track pitches is improved. Further, the tracking of the OPU 100 with respect to the signal surface portion Ma of the medium M is easily performed with high accuracy.
- the diffraction grating 10 is adjacent to the first region portion 11, the second region portion 12 adjacent to the first region portion 11 and having a periodic structure different from the periodic structure of the first region portion 11, and the second region portion 12.
- a third region portion 13 having a periodic structure different from the periodic structure of the second region portion 12 and a fourth region portion 14 adjacent to the third region portion 13 and having a periodic structure different from the periodic structure of the third region portion 13.
- the diffraction grating 10 is configured as a so-called quadrant type, inline grating.
- the OPU 100 is equipped with the diffraction grating 10 divided into a plurality of region portions 11, 12, 13, and 14, the error signal of the OPU 100 is detected with respect to the signal surface portion Ma of the medium M.
- the tracking of the OPU 100 with respect to the signal surface portion Ma of the medium M is performed well.
- the signal surface portion Ma of the medium M is irradiated with at least three independent condensing spots. Since at least three focused spots are independently irradiated on the signal surface portion Ma of the medium M, when data recording or the like is performed on two or more types of media M having different track pitches, or when the track pitches are different.
- the diffraction grating 10 is adjacent to one of the substantially rectangular regions 18 including the first region 11 and the second region 12 adjacent to the first region 11, and the third region 13 and third region 13.
- the other region portion 19 having a substantially rectangular shape including the fourth region portion 14 is provided.
- the width 11w of the first region portion 11 of the diffraction grating 10 and the width 14w of the fourth region portion 14 are substantially equal.
- the width 12w of the second region portion 12 of the diffraction grating 10 and the width 13w of the third region portion 13 are substantially equal.
- the diffraction grating 10 is one of the components constituting the diffraction grating 10 by the boundary line portion 16 between the second region portion 12 of the diffraction grating 10 and the third region portion 13 of the diffraction grating 10 adjacent to the second region portion 12.
- the region portion 18 and the other region portion 19 constituting the diffraction grating 10 are divided into two equal parts.
- the diffraction grating 10 is divided into even numbers.
- the condensing spot formed on the signal surface portion Ma of the medium M is formed as an accurate condensing spot.
- the diffraction grating 10 is divided into two equal parts, one area part 18 including the second area part 12 and the other area part 19 including the third area part 13 and the fourth area part 14 adjacent to the third area part 13.
- the laser beam emitted from the LD and applied to the diffraction grating 10 can be easily adjusted by, for example, an optical axis adjustment camera (not shown). Is done.
- the laser light emitted from the LD and applied to the diffraction grating 10 and then transmitted through the OBL 131/132 can be observed using, for example, an optical axis adjustment camera.
- the laser light is one of the substantially rectangular regions constituting the diffraction grating 10.
- the part 18 and the other part 19 of the substantially rectangular shape constituting the diffraction grating 10 are easily applied to a substantially bisected state.
- the laser light is easily applied to one of the substantially rectangular region portions 18 constituting the diffraction grating 10 and the other substantially rectangular region portion 19 constituting the diffraction grating 10 in a state of being divided into approximately equal parts.
- the diffraction grating 10 is easily provided in the housing 110 of the OPU 100 while being accurately positioned and adjusted. Therefore, it is easy to form a focused spot on the signal surface portion Ma of the medium M with high accuracy. Accordingly, tracking of the OPU 100 with respect to the signal surface portion Ma of the medium M is easily performed with high accuracy.
- the bonding member / adhesive will be described.
- a one-component or two-component epoxy resin, a one-component acrylic resin, or the like as a main component is an ultraviolet curable adhesive.
- An electron beam curable adhesive may be used.
- the adhesive include thermosetting resins mainly composed of one-component or two-component epoxy resins, modified acrylic resins, and the like.
- An adhesive made of a one-component resin or the like is excellent in, for example, bonding workability, and an adhesive made of a two-component resin or the like is excellent in, for example, price characteristics of the adhesive.
- the OPU 100 includes an adhesive member so-called the above-described adhesive that bonds and fixes each of various parts without separating them.
- the adhesive include resins / polymers such as one-component and / or two-component epoxy resins, acrylic resins, urethane resins, and methacrylic resins.
- any one of resins / polymers selected from the above resin group is used as a polymer / main component constituting a one-component and / or two-component adhesive.
- the epoxy resin, urethane resin, thermosetting acrylic resin, and the like are, for example, thermosetting resin / polymer.
- polymers such as polythiol etc.
- amine-type materials such as a polyamidoamine, a modified polyamine, and a tertiary amine
- any one of the polymers selected from the polymer group is used as the curing agent constituting the two-component adhesive.
- An adhesive made of a one-part polymer is excellent in, for example, adhesion workability, and an adhesive made of a two-part polymer is excellent in, for example, price characteristics of the adhesive.
- an electron beam curable adhesive having a property of being cured when irradiated with an electron beam such as light can be used. More specifically, an ultraviolet curable adhesive having a property of being cured when irradiated with ultraviolet rays can be used as the adhesive. More specifically, as the adhesive, an ultraviolet curable adhesive having a property of being cured by being irradiated with ultraviolet rays and having a thermosetting property can be used. Further, for example, an ultraviolet curable adhesive can be used together with a thermosetting adhesive. When the ultraviolet curable adhesive is irradiated with, for example, ultraviolet rays having a wavelength of about 350 to 380 nm, the ultraviolet curable adhesive is cured in a short time. Adhesion was performed using an ultraviolet curable adhesive, which is a kind of electron beam curable adhesive.
- the adhesive examples include a one-component adhesive and a two-component adhesive.
- a polymer / main agent constituting a one-component and / or two-component adhesive an epoxy polymer, a modified acrylic polymer, a polyurethane polymer, an acrylic ester polymer, a methacrylic ester polymer At least one polymer selected from the group consisting of:
- the resin constituting the one-component and / or two-component adhesive after being cured is a group consisting of an epoxy resin, a modified acrylic resin, a polyurethane resin, a polyacrylic resin, and a polymethacrylic resin.
- at least one polymer selected from the group consisting of polythiol, polyamidoamine, modified polyamine, and tertiary amine is used as a curing agent that constitutes the two-component adhesive.
- an adhesive that has been bonded using a two-component ultraviolet curable adhesive can be used.
- the two-component ultraviolet curable adhesive include a two-component epoxy-based ultraviolet curable adhesive.
- a polymer adhesive such as an acrylic adhesive or an epoxy adhesive, for example, a high vibration component or the like is absorbed.
- Araldite (registered trademark) 2010-1 has a viscosity of about 80,000 mPas (millipascal second) under a temperature condition of 23 ° C., and is excellent in rapid curability.
- Araldite (registered trademark) 2012 is a two-part adhesive having a main agent AW2104 and a curing agent HW2934, and has a viscosity of about 25000 to 35000 mPas under a temperature condition of 23 ° C. Excellent in properties and fast curability.
- Specific polyurethane adhesives include, for example, Swiss Huntsman (Huntsman Advanced Materials) / Huntsman Japan Co., Ltd .: Araldite (registered trademark) 2055.
- Araldite (registered trademark) 2055 is, for example, thixotropic, and has a tensile shear strength of approximately 9000 mPas, for example, and is excellent in gap filling properties.
- the thixotropy means, for example, a phenomenon in which the apparent viscosity is lowered when stirred in a solid liquid coexisting state in which a part is solidified when solidifying from a solution state.
- modified acrylic adhesive examples include Araldite (registered trademark) 2021 manufactured by Huntsman (Huntsman Advanced Materials) of Switzerland and sold by Huntsman Japan.
- Araldite (registered trademark) 2021 is a two-part adhesive having a main agent XD4661A and a curing agent XD4661D, has a viscosity of about 60000 mPas at 23 ° C., and has a minimum curing time of about It is as short as 18 minutes and is faster curing than other Araldite (registered trademark).
- examples of the adhesive include anaerobic adhesives such as Three Bond Co., Ltd .: anaerobic strong sealant.
- the anaerobic adhesive is an adhesive that is not cured while being exposed to air, for example, and is cured by blocking the air.
- manufactured by ThreeBond Co., Ltd .: Anaerobic strong sealant also has electron beam curing characteristics such as ultraviolet curing characteristics.
- an exposed anaerobic adhesive is irradiated with an electron beam such as ultraviolet rays.
- the protruding anaerobic adhesive is cured.
- the main component constituting the anaerobic adhesive include (meth) acrylic acid ester, methacrylic acid ester, and methacrylic acid ester monomer.
- ThreeBond (registered trademark) 1359D has a (meth) acrylic acid ester as a main component before curing, and has a viscosity of approximately 14000 mPas at room temperature, for example, is fast curing, and has electron beam curing characteristics such as ultraviolet curing characteristics. After being cured, it becomes a polyacrylic resin, and is excellent in vibration resistance, heat resistance, flexibility, surface adhesion, and the like.
- ThreeBond (registered trademark) 1373N has a main component before curing as a methacrylic acid ester.
- the viscosity at room temperature is approximately 90 mPas and is fast-curing, and has electron beam curing characteristics such as ultraviolet curing characteristics. After being cured, it becomes a methacrylic resin, and is excellent in vibration resistance, heat resistance, low temperature curability and the like.
- the instantaneous adhesive is an adhesive that fixes the adherends at a “second speed” of several seconds to several tens of seconds.
- Examples of the 7700 series manufactured by ThreeBond Co., Ltd., which are instant adhesives, include ThreeBond (registered trademark) 7741.
- ThreeBond (registered trademark) 7741 has ethyl 2-cyanoacrylate as a main component, has a viscosity of approximately 2 mPas at room temperature, for example, and is excellent in instantaneous adhesiveness.
- examples of the ultraviolet curable adhesive that is a kind of electron beam curable adhesive include, for example, optical UV adhesives NOA65, NOA68, NOA73, NOA83H manufactured by NORLAND, USA.
- Ultraviolet curable adhesives such as optical UV adhesives NOA65, NOA68, NOA73, and NOA83H are acrylic and are one-component ultraviolet curable adhesives.
- Acrylic ultraviolet curable adhesives have a short curing time and can be cured in units of several seconds. “UV” means “ultraviolet”.
- “Ultraviolet radiation” means “ultraviolet rays”.
- the ultraviolet curable adhesive is called a UV curable adhesive or the like.
- NORLAND: NOA65 has a viscosity of, for example, about 1000 to 1200 cps at room temperature, and is flexible and can be adhered to, for example, an elaborate part. Note that 1 cps is 1 mPas.
- NORLAND: NOA68 for example, has a viscosity of approximately 5000 cps at room temperature, and is flexible and can be adhered to, for example, an elaborate part.
- NOA73 for example, has a viscosity of about 130 cps at room temperature, and is flexible and has a low viscosity. For example, it can be thinly adhered to an elaborate part.
- NORLAND: NOA83H has a viscosity of about 250 cps at room temperature, for example, and has a thermosetting property in addition to a UV property, and can be bonded to a portion where light does not reach directly, for example.
- UV curable adhesive which is a kind of electron beam curable adhesive
- those of EMI Co., Ltd. in the USA trade name “OPTOCAST” series and the like
- UV curable adhesives include OPTOCAST 3415, OPTOCAST 3505-HM manufactured by EMI, USA.
- UV curable adhesives such as OPTOCAST3415 and OPTOCAST3505-HM are epoxy-based adhesives and are one-component ultraviolet curable adhesives.
- Epoxy ultraviolet curable adhesives have low shrinkage and high heat resistance, and are excellent in chemical resistance and moisture resistance.
- OPTOCAST3415 has a viscosity of, for example, about 100000 cps at room temperature, and is reliably cured by being heated in addition to UV irradiation.
- OPTOCAST 3505-HM manufactured by EMI for example, has a viscosity of about 300 to 500 cps at room temperature, and is reliably cured by being heated in addition to UV irradiation.
- the viscosity of the adhesive when the bonding step is performed is, for example, approximately 2 mPas or more and approximately 180,000 mPas or less, for example, at room temperature, specifically at a temperature of 23 ° C.
- the viscosity of the adhesive is higher than about 180,000 mPas under room temperature conditions, specifically 23 ° C., there is a concern that the adhesive does not spread substantially uniformly on the adhesive application portion. Is done.
- the viscosity of the adhesive when the bonding step is performed is preferably about 60000 mPas or less, for example, at room temperature, specifically at 23 ° C. More preferably, when the bonding step is performed, the adhesive is bonded to the adhesive application portion by setting the viscosity of the adhesive under room temperature conditions, specifically 23 ° C., to about 14000 mPas or less, for example. The agent is surely spread.
- the viscosity of the adhesive under the condition at room temperature specifically 23 ° C.
- the viscosity of the adhesive under the condition at room temperature is a low viscosity of less than about 2 mPas
- the adhesive may drop from the adhesive application part. Is done.
- the adhesive when the bonding process is performed, has a viscosity of, for example, approximately 250 mPas or more under conditions at room temperature, specifically 23 ° C., for example, dripping of the adhesive, etc. Is less likely to occur, and the adhesive remains widely and reliably in the adhesive application portion.
- the adhesive when the bonding step is performed, has a viscosity of, for example, approximately 1000 mPas or more under conditions at room temperature, specifically, a temperature condition of 23 ° C., for example, dripping of the adhesive.
- production etc. become easy to be prevented and an adhesive agent stays in an adhesive application part more reliably.
- the diffraction grating 10 and the diffraction grating spring 30 are installed in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110, and then the attachment position of the diffraction grating 10 is adjusted.
- a kind of electron beam curable adhesive is applied to the pair of upper end surface portions 11a, 14a, the pair of folded bent portions 31b, 32b of the diffraction grating spring 30, and the pair of upper end surface portions 121, 122 of the diffraction grating holder 120.
- an ultraviolet curable adhesive which is a kind of electron beam curable adhesive, is irradiated with ultraviolet light, which is a kind of electron beam, to solidify the adhesive.
- the diffraction grating 10 and the diffraction grating spring 30 are elastically held / fixed with high precision in the accommodation chamber 129 of the diffraction grating holder 120 of the housing 110.
- a representative optical member positioned at the tip of the diffraction grating 10 will be described.
- a laser beam (not shown) is applied to the signal surface portion Ma of the medium M such as the optical disc M.
- the OPU 100 including two or more OBLs 131 and 132 is configured.
- an OBL 132 having a numerical aperture of about 0.6 to 0.66 corresponding to a first laser wavelength light having a wavelength of about 765 to 840 nm and a second laser wavelength light having a wavelength of about 630 to 685 nm, and a wavelength Is configured to include an OBL 131 having a numerical aperture of approximately 0.85 corresponding to light having a third laser wavelength of approximately 340 to 450 nm.
- the numerical aperture means, for example, the product of the sine of the angle at which the effective radius (incident pupil radius) of the objective lens is viewed from an object point in an optical instrument and the refractive index of the medium on the incident side.
- the numerical aperture is abbreviated as “NA”.
- the numerical aperture is used to express the performance of the objective lens.
- the OPU 100 includes a pair of OBLs 131 and 132 that squeeze the laser light to irradiate and form a focused spot on the signal layer Ma of the optical disc M.
- the OBL 131 is formed, for example, as a convex lens provided with a substantially convex curved surface portion on the inner side of the OPU 100.
- the upper surface portion 131b of the OBL 131 is formed in, for example, a substantially flat shape, but the upper surface portion 131b of the OBL 131 may be formed in, for example, a substantially convex shape, or may be formed in a substantially concave shape. .
- the OBL 132 is formed as a convex lens provided with a substantially convex curved surface portion on the inner side of the OPU 100, for example.
- the upper surface portion 132b of the OBL 132 is formed, for example, in a substantially flat shape, but the upper surface portion 132b of the OBL 132 may be formed, for example, in a substantially convex shape, or may be formed in a substantially concave shape. .
- the laser beam is focused on the signal layer Ma of the optical disc M by moving the OBLs 131 and 132 of the OPU 100 up and down / left and right using the actuator 190 of the OPU 100. More specifically, when the signal layer Ma of the optical disc M is irradiated and formed with a high-precision laser spot, the OBLs 131 and 132 mounted on the lens holder 140 are moved by the actuator 190 of the OPU 100 to the focusing direction D1, the tracking direction D2, and It is moved substantially along the tilt direction D4 or the like as necessary.
- the OPU 100 performs focusing adjustment, tracking adjustment, and tilt adjustment as necessary when the laser beams are focused by the OBLs 131 and 132. In addition, the focusing adjustment, the tracking adjustment, and the tilt adjustment are performed substantially simultaneously, for example.
- Focusing means focusing or focusing.
- the track means a signal trajectory on the optical disc M, for example.
- the tracking means that a minute signal portion provided on the signal surface portion Ma of the optical disk M is tracked and observed using light, and the position of the orbit drawn in a substantially spiral shape is determined.
- the tilt in the optical disk device or the optical pickup device means an angular deviation between the disk surface and the optical axis of the objective lens.
- the lens holder assembly 193 including the lens holder 140 with the OBLs 131 and 132 mounted on the optical disc M when the focus servo of the lens holder assembly 193 including the lens holder 140 with the OBLs 131 and 132 mounted on the optical disc M is performed, the lens holder assembly including the lens holder 140 with the OBLs 131 and 132 mounted thereon.
- the solid 193 is moved along the up-down direction D1.
- tracking servo of the lens holder assembly 193 including the lens holder 140 with the OBLs 131 and 132 mounted on the optical disc M when tracking servo of the lens holder assembly 193 including the lens holder 140 with the OBLs 131 and 132 mounted on the optical disc M is performed, a lens holder assembly including the lens holder 140 with the OBLs 131 and 132 mounted thereon.
- the solid 193 is moved along the left-right direction D2 with respect to the line direction of a substantially spiral track (not shown) of the optical disc M, for example.
- the servo or servo mechanism means a mechanism that measures the state of the object to be controlled, compares the measured value with a reference value, and automatically performs correction control.
- the lens holder assembly 193 including the lens holder 140 equipped with the OBLs 131 and 132 is moved up, down, left, right, etc. Driven.
- the pair of OBLs 131 and 132 are arranged in parallel with the lens holder 140 along the tracking direction D ⁇ b> 2 that is substantially along the one radial direction D ⁇ b> 2 of the optical disk M.
- the focus direction D ⁇ b> 1 that is substantially along the optical axis direction D ⁇ b> 1 of the OBL 131, 132, and the one radial direction D ⁇ b> 2 of the optical disk M.
- a pair of OBLs 131 and 132 may be juxtaposed on the lens holder 140 along a tangential direction D3 that is a direction orthogonal to the tracking direction D2 that is substantially along.
- one OBL may be mounted on the lens holder 140 without using the plurality of OBLs 131 and 132.
- optical member holding member 140 constituting the OPU 100
- a plurality of OBLs 131, 132, a plurality of coils 151, 151, 152, 152, 153, 153, and a plurality of suspension wires 160/161, 162, 163, 164 165 and 166 are used, and the lens holder 140 constituting the lens-holder assembly 193 is used.
- the OPU 100 includes a single top wall 141 having a substantially rectangular flat plate shape, and four side walls 142, 143, 144, and 145 having a substantially rectangular flat plate shape substantially orthogonal to the top wall 141, and two OBLs 131, 132 includes a lens holder 140 made of a synthetic resin having a two-piece structure in a substantially rectangular box shape that is mounted on a top wall 141 having a substantially rectangular flat plate shape.
- the pair of front and rear side walls 142 and 145 having a substantially rectangular flat plate shape face each other substantially in parallel
- the pair of left and right side walls 143 and 144 having a substantially rectangular flat plate shape face each other substantially in parallel.
- a pair of left and right side walls 143, 144 are positioned substantially orthogonal to the side walls 142, 145, and further, a single rectangular ceiling plate 141 that is substantially orthogonal to the side walls 142, 143, 144, 145. Is positioned above the side walls 142, 143, 144, and 145, so that a lens holder 140 having a substantially rectangular box shape is formed.
- the coils 151, 152, 153 constituting the OPU 100 focus / tilt coils 151, 152 and a tracking coil for driving the lens holder assembly 193 substantially along each direction D1, D2, D4 when electricity is applied. 153 is used.
- the OPU 100 constitutes a differential actuator 190 for driving a lens holder 140 having a plurality of OBLs 131 and 132, and both side walls 142 and 145 having substantially rectangular horizontally long flat plates facing each other of the lens holder 140 having a substantially rectangular box shape.
- the lens holder 140 having a plurality of OBLs 131, 132 is driven substantially along the optical axis direction D1 of the OBLs 131, 132 or driven substantially along the swing direction D4.
- a substantially rectangular annular first focus / tilt coil 151 and a substantially rectangular annular second focus / tilt coil 152 arranged substantially in parallel with the substantially rectangular annular first focus / tilt coil 151.
- a conventional focus coil and a conventional tilt coil are integrated to form, for example, a first focus / tilt coil 151 having both the functions of a conventional focus coil and the functions of a conventional tilt coil.
- a conventional focus coil and a conventional tilt coil are integrated to form a second focus / tilt coil 152 having, for example, the functions of the conventional focus coil and the conventional tilt coil.
- the OPU 100 constitutes a differential actuator 190 for driving a lens holder 140 having a plurality of OBLs 131 and 132, and is substantially the substantially rectangular horizontally long plate-like side walls 142 and 145 of the lens holder 140 having a substantially rectangular box shape.
- a pair of front and rear is attached to the central portion 148, and are arranged substantially in parallel between a substantially rectangular annular first focus / tilt coil 151 and a substantially rectangular annular second focus / tilt coil 152, and have a plurality of OBLs 131 and 132.
- a substantially rectangular annular tracking coil 153 that drives the lens holder 140 substantially along the radial direction D2 of the optical disk M is provided.
- support members 161, 162, 163, 164, 165, and 166 that support the lens holder assembly 193 that constitutes the OPU 100 and that includes the optical members 131 and 132 so as to be movable in a hollow state are, for example, thin lines that are substantially linear. Suspension wires 161, 162, 163, 164, 165, and 166 having a diameter are used.
- the OPU 100 is mounted on a lens holder assembly 193 having a substantially rectangular box shape, and a plurality of substantially linear elastic support members 161, 162, 163, 164, 165, which elastically support the lens holder assembly 193.
- 166 so-called substantially linear suspension wires 161, 162, 163, 164, 165, 166 are provided.
- each of the substantially linear suspension wires 161, 162, 163, 164, 165, and 166 constituting the OPU 100 includes a focus direction D1 that is substantially along the optical axis direction D1 of the OBLs 131 and 132, and the optical disc M. It extends substantially along a tangential direction D3 which is a direction orthogonal to the tracking direction D2 which is substantially along the one radial direction D2.
- the tangential direction D3 is set to the other radial direction D3 of the optical disc M depending on the rotation position of the optical disc M or the like.
- At least four of the six left and right suspension wires 161, 162, 163, 164, 165, and 166 mounted on the lens / holder assembly 193 of the OPU 100, preferably the six left and right suspension wires 161, 162, 163, are provided.
- 164, 165, and 166 are supplied with electricity, such as a drive signal and a control signal, so that the lens and holder assembly 193 of the OPU 100 is mounted on each suspension wire 161, 162, 163, 164, 165, and 166.
- Electricity such as a drive signal and a control signal, is supplied to at least four coils, preferably six coils 151, 151, 152, 152, 153, and 153, connected to be energized.
- magnetic members 171 and 176 constituting the OPU 100 for example, substantially rectangular parallelepiped magnets so-called magnets 171 and 176 that generate magnetism / magnetic force themselves are used.
- a single-pole driving magnet 171 is used in which the positive electrode portion 174a is formed on the one portion 173a side on the one surface portion 172 side and the negative electrode portion 174b is formed on the other portion 173b side on the one surface portion 172 side.
- a single-pole driving magnet 176 in which a positive electrode portion 179a is formed on one side 178a side on the one surface portion 177 side and a negative electrode portion 179b is formed on the other portion 178b side on the one surface portion 177 side is used. It is done.
- the design / specifications of the OPU 100, etc. for example, as the magnetic members 171 and 176, a one-pole / two-pole magnet or a multi-pole magnetized magnet having two or more poles is used. Also good.
- a frame / yoke 180 having a complicated structure to which the magnetic members 171, 176 and the like are mounted is used.
- the frame / yoke 180 is bent at a substantially right angle with respect to the base wall portion 182, a pair of side wall portions 183 and 184 that are bent and extended substantially at right angles to the base wall portion 182, and a pair of side wall portions 183 and 184.
- a ceiling wall portion 181 formed substantially parallel to the base wall portion 182 and surrounding each of the substantially rectangular parallelepiped magnets 171 and 176.
- the OPU 100 includes a fixing member 180, for example, a frame / yoke 180, on which at least two, preferably four, more preferably six substantially rectangular flat-plate magnets 171 and 176 are provided.
- the fixing member 180 is configured as a frame yoke 180, for example.
- the frame means, for example, a frame, a framework, or a skeleton.
- the yoke means, for example, one that structurally supports magnetic coupling.
- the yoke is designed to reduce leakage of magnetic force generated from a magnetic member such as a magnet.
- the frame yoke is formed as a frame having a function as a yoke.
- a magnetic coupling member and a back yoke equipped with magnets 171 and 176 are used as the frame / yoke 180.
- the magnetic coupling member and the back yoke are handled as the frame / yoke 60.
- the OPU 100 includes a light receiving element so-called a photodetector that receives the laser light reflected from the signal layer Ma of the optical disc M, a PDIC (photo diode IC) or a photo detector (PD: photo detector) (not shown).
- a PD (not shown) includes a main light receiving portion (not shown) having a substantially rectangular shape in plan view corresponding to a main beam (0th order light) transmitted through a plurality of divided diffraction gratings 10 such as a quadrant type, and a diffraction grating 10.
- the main light receiving portion having a substantially rectangular shape in plan view is divided into four substantially equal parts and includes four segments having a substantially rectangular shape in plan view.
- the sub-light-receiving part having a substantially rectangular shape in plan view is divided into four substantially equal parts and includes four segments having a substantially rectangular shape in plan view.
- the OPU 100 is equipped with a PD having a plurality of light-receiving units each having a plurality of substantially rectangular segments in plan view.
- a segment means one of parts divided into several parts, such as a part and a fragment.
- the PD receives laser light reflected from the signal layer Ma of the optical disc M, converts the signal into an electrical signal, and detects data, information, and signals recorded on the signal layer Ma of the optical disc M. ing.
- the PD receives the laser beam reflected from the signal layer Ma of the optical disc M, converts the signal into an electric signal, and includes a lens holder assembly 193 including the lens holder 140 with OBLs 131 and 132 constituting the OPU 100. It is intended to operate the servo mechanism.
- the OPU 100 reads, for example, data / information / signal recorded on the optical disc M, writes data / information / signal on the optical disc M, and erases data / information / signal recorded on the optical disc M.
- each laser beam is irradiated on each light receiving portion of the PD, thereby detecting a main information signal of the optical disc M, a focus error signal, a tracking error signal, and the like for the optical disc M.
- the OPU 100 also has, for example, a substantially gel-like damping material (not shown) that suppresses abnormal vibration generated in the suspension wires 161, 162, 163, 164, 165, and 166, and a damping holding member 197 that holds the damping material.
- a substantially gel-like damping material (not shown) that suppresses abnormal vibration generated in the suspension wires 161, 162, 163, 164, 165, and 166
- a damping holding member 197 that holds the damping material.
- the suspension wires 161, 162, 163, 164, 165, and 166 are inserted into holes (not shown) of the damping holding member 197 mounted on the rear side of the frame / yoke 180.
- a hole (not shown) of the damping holding member 197 through which the suspension wires 161, 162, 163, 164, 165, and 166 are inserted is filled with, for example, a dumping agent made of a synthetic polymer having high flexibility.
- the OPU 100 also includes a circuit board 199 to which the suspension wires 161, 162, 163, 164, 165, and 166 are connected and attached so as to be energized.
- the circuit board is called, for example, a PWB (printed wired board / printed wiring board).
- the OPU 100 includes a covering member (not shown), for example, a covering plate, for protecting various parts of the OPU 100.
- a covering member for example, a covering plate
- a cover plate that protects various components, for example, is provided on the upper side of the OPU 100.
- the OPU 100 also includes a housing 110 (FIGS. 1 and 2) in which various optical system parts, electrical system parts, drive system parts and the like are equipped.
- the housing means, for example, a box in which an object such as an apparatus or a part is accommodated, a box shape, or something similar to a box.
- a laser diode LD
- a half-wave plate (1 / 2 ⁇ plate)
- a wide-band quarter-wave plate with aperture restriction (1 ⁇ 4 ⁇ plate)
- a liquid crystal correction element LCD: liquid crystal device / liquid crystal display
- DOE diffractive optical element
- diffraction grating inline grating
- divergent lens prism
- polarizing beam splitter dichroic filter
- collimator lens beam expander Lenses, half mirrors, reflect mirrors, total reflection mirrors
- objective lenses front monitor diodes, sensor lenses, anamorphic lenses, intermediate lenses, photodetectors, etc. I can get lost.
- the OPU 100 includes the optical system parts.
- the housing 110 for example, a printed board, a storage device (ROM: read-only memory), a suspension wire, a coil, an actuator, a flexible printed circuit body, a connector, a laser driver, a laser diode, a liquid crystal
- a beam expander unit including a correction element, a collimator lens, and the like, a front monitor diode, and a photodetector.
- the OPU 100 includes the electric system parts.
- examples of the drive system components provided in the housing 110 include a beam expander unit including a suspension wire, a coil, a magnet, a yoke, an actuator, an objective lens, a lens holder, a collimator lens, and the like.
- the OPU 100 includes the drive system parts.
- the housing 110 includes a housing body 115 on which various parts such as various optical system parts, electrical system parts, and drive system parts are provided, and a first support 91 that protrudes from the housing body 115 and serves as a first shaft member.
- the support body 92 and the bearing portion 112 for the countershaft that is movably matched are formed.
- the main shaft bearing portions 111 a and 111 b and the sub shaft bearing portion 112 are integrally formed with the housing body 115.
- the main shaft bearing portions 111a and 111b, the sub shaft bearing portion 112, and the housing body 115 are formed as one unit.
- the substantially round hole-shaped first bearing portion 111a and the substantially round bar-shaped first support body 91 are slid. Touch. Further, when the OPU 100 moves substantially along the longitudinal direction D2 of the substantially round bar-shaped supports 91, 92, the substantially round hole-shaped second bearing portion 111b, and the substantially round bar-shaped first support 91, , Is in sliding contact. Further, when the OPU 100 moves substantially along the longitudinal direction D2 of the substantially round bar-like supports 91 and 92, a third bearing part 112 having a substantially U-shaped sliding bearing structure in a sideways manner, The second support 92 is in sliding contact.
- the longitudinal direction D2 of the substantially round bar-shaped supports 91 and 92 is the moving direction D2 of the OPU 100 applied from the inner peripheral side of the optical disc M to the outer peripheral side and / or the movement of the OPU 100 applied from the outer peripheral side of the optical disc M to the inner peripheral side.
- the direction is D2.
- the support bodies 91 and 92 are formed as, for example, slide shafts 91 and 92 slidably contactable with the bearing portions 111a, 111b, and 112 of the housing 110 of the OPU 100.
- the supports 91 and 92 are excellent in corrosion resistance.
- a “bar” or the like is used.
- the bearing portions 111a, 111b, and 112 are formed as, for example, the sliding portions 111a, 111b, and 112 that can slide on the slide shafts 91 and 92, for example.
- the OPU 100 has a substantially three-point structure that is stable on the pair of slide shafts 91 and 92 by the first sliding portion 111a, the second sliding portion 111b, and the third sliding portion 112 of the housing 110. It is supported movably.
- the OPU 100 is movable on the pair of slide shafts 91 and 92 by three main points of the first sliding portion 111a, the second sliding portion 111b, and the third sliding portion 112 of the housing 110. Therefore, the friction is reduced as compared with, for example, an OPU (not shown) having a four-point support structure.
- the third sliding portion 112 constitutes an open sideways substantially U-shaped sliding bearing structure, for example, the assembling operation of the OPU 100 to the slide shaft 92 serving as the auxiliary shaft is performed. Is easily done. Further, since the third sliding portion 112 is configured to constitute an open sideways substantially U-shaped sliding bearing structure, for example, with respect to the first slide shaft 91 serving as the main shaft, the sub shaft A slight error such as the degree of parallelism of the second slide shaft 92 is absorbed by the third sliding portion 112 of the opened substantially U-shaped sliding bearing structure in a sideways manner.
- the OPU 100 includes the lens holder assembly 193 having the OBLs 131 and 132, the coils 151, 151, 152, 152, 153, and 153, the suspension wires 161, 162, 163, 164, 165, and 166, and the magnet. 171 and 176, and the frame / yoke 180.
- the OPU 100 is configured to include other parts other than the above-described various parts, but detailed description of other parts is omitted here.
- the pickup apparatus main body assembly 7 constituting the traverse mechanism 5 includes a substantially flat chassis 80, a pair of long round rod-like slide shafts 91 and 92 attached to the substantially flat chassis 80, and a pair of long And an OPU 100 that is movably mounted on a round rod-shaped slide shaft 91, 92. Further, the OPU 100 includes a pair of OBLs 131 and 132 that irradiate the signal surface Ma of the disk M with light such as laser light in focus.
- a substantially flat chassis 80 constituting the optical pickup device main body assembly 7 is provided with a substantially flat circuit board 60 constituting the rotating motor main body assembly 50 using an adhesive or the like, and The pair of substantially round rod-like slide shafts 91 and 92 are provided in the substantially flat chassis 80, so that the traverse mechanism 5 having high accuracy and hardly causing the position shift of each part, the optical disc apparatus 1 including the traverse mechanism 5, and the like are configured. Is done.
- the optical disc apparatus 1 including the OPU 100 and the traverse mechanism 5 records data, information, signals, and the like on the various optical discs M, reproduces data, information, signals, and the like on the various optical discs M, and the various optical discs M.
- it can be used in a recording / reproducing apparatus that erases data, information, signals, and the like.
- the optical disk apparatus 1 including the OPU 100 and the traverse mechanism 5 can be used for, for example, a reproduction-only apparatus that reproduces data, information, signals, and the like of the various optical disks M.
- an OPU equipped with one OBL 131 or 132 may be used instead of the OPU 100 equipped with the two OBLs 131 and 132.
- a tray (not shown) that can be inserted into and removed from the optical disk apparatus body 2 of the optical disk apparatus 1 is used. Is provided with a disk M.
- the optical disc apparatus 1 (FIGS. 1, 2 and 9) is equipped with an optical disc M and a tray (not shown) that can be inserted into and removed from the optical disc apparatus body 2 and a turntable 73 (FIGS. 2 and 2). 9) and a clamper (not shown) that faces the turntable 73 and can clamp the optical disc M, a drive device 40 that includes the turntable 73 and rotates the optical disc M, and the optical disc M
- the OPU 100 is configured to be irradiated with laser light, and a pair of slide shafts 91 and 92 that movably support the OPU 100 when the OPU 100 is moved along one radial direction D2 of the optical disk M.
- the substantially rectangular box-shaped housing 3 (FIG. 9) constituting the optical disk apparatus 1 is used for a so-called cover 3, and a substantially plate-like tray that can be freely moved in and out is used to accommodate the optical disk M in the optical disk apparatus 1. .
- a drive device 40 (FIGS. 2 and 9) for rotating the optical disk M is housed in the cover 3 constituting the optical disk device 1.
- a disk drive device 40 having a substantially round plate-like turntable 73 on which the optical disk M is mounted is used.
- the OPU 100 that reads data / information / signals on the optical disc M, records data / information / signals on the optical disc M, and erases data / information / signals on the optical disc M is a cover that constitutes the optical disc apparatus 1. 3 is equipped.
- the upper cover (not shown) is attached to the lower cover 3 equipped with various components, and the optical disc apparatus 1 is assembled.
- a clamp device having a turntable 73 and a clamper facing the turntable 73 was used to position the optical disk M having a round hole Mb in the center portion Mc between the turntable 73 and the clamper. It is pinched securely in a state and is detachably fixed.
- the optical disk apparatus 1 is an optical disk apparatus 1 for a desktop PC that includes an OPU 100 for a desktop personal computer (PC), for example. Further, the optical disk apparatus 1 is configured to include other parts in addition to the above-mentioned various parts, but detailed description of other parts is omitted here.
- the same thing is used for the elastic member 30 in 1st embodiment, and the elastic member 30 in 2nd embodiment.
- the same components as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the pickup apparatus 100X includes one objective lens 133 corresponding to the laser beams having various wavelengths.
- the mounting structure of the optical element 10X includes the optical element 10X (FIGS. 11, 12, and 13), a holding member 20 equipped with the optical element 10X, and a holding member 20 equipped with the optical element 10X.
- Elastic member 30 (FIGS. 3, 4, and 14) used when the optical element 10X, holding members 20, 26 (FIG. 13), and holding portion 120X (FIGS. 14 to 17) equipped with the elastic member 30 are used. ) And (FIG. 14).
- the elastic member 30 is press-fitted into the holding portion 120X, and holding members 20 and 26 including the optical element 10X are provided in the holding portion 120X by the elastic member 30.
- the optical element 10X is formed in a substantially rectangular plate shape in front view through which light can be transmitted.
- the elastic member 30 is formed in a substantially concave shape in front view through which light can pass.
- the holding portion 120X is formed using a resin.
- the elastic member 30 is formed using metal.
- the optical element 10X is a diffraction grating 10X that divides incident light into a plurality of pieces.
- the first wavelength laser beam and the second wavelength laser beam emitted from the LD are main beams (0th order) by an optical element 10X so-called diffraction grating 10X divided into a plurality of region portions 11x, 12x, 13x, 14x such as four divisions.
- Light and two sub-beams ( ⁇ first-order diffracted light beams).
- the holding member 20 provided with the optical element 10X is provided in the holding unit 120X by the elastic member 30 provided together with the holding unit 120X. Since the elastic member 30 is press-fitted into the holding unit 120X, for example, when the mounting position of the holding member 20 including the optical element 10X equipped with the elastic member 30 is adjusted to the holding unit 120X, the elastic member 30 is carelessly Accordingly, for example, it is avoided that the position adjustment of the holding member 20 including the optical element 10X is performed inaccurately. Therefore, the holding member 20 provided with the optical element 10X can be accurately provided in the holding unit 120X.
- the elastic member 30 is an elastic member 30 used when the holding member 20 provided with the optical element 10X is mounted while being aligned with the holding portion 120X. Press-fit fixing portions 36 and 37 for positioning and fixing the elastic member substrate portion 33 with respect to the holding portion 120X are provided.
- the elastic member substrate portion 33 is formed in a substantially plate shape.
- the press-fit fixing portions 36 and 37 are projecting portions 36 and 37 that project from the left and right side portions 33L and 33R in the front view of the elastic member substrate portion 33.
- the press-fit fixing portion 36 has inclined surface portions 36a and 36b that allow the elastic member substrate portion 33 to be detachably mounted on the holding portion 120X.
- the press-fit fixing portion 37 has inclined surface portions 37a and 37b that allow the elastic member substrate portion 33 to be detachably mounted on the holding portion 120X.
- the abutting force generating portions 31 and 32 for generating a restoring elastic force with respect to the holding members 20 and 26 including the optical element 10X and the holding portion 120X are extended to the elastic member substrate portion 33.
- the contact force generating portions 31 and 32 are folded back with respect to the elastic member substrate portion 33.
- the elastic member 30 having the above-described configuration is used as the elastic member 30.
- the holding member 20 including the optical element 10X When the holding member 20 including the optical element 10X is mounted while being aligned with the holding unit 120X, the holding member 20 including the optical element 10X is provided in the holding unit 120X by the elastic member 30 provided in the holding unit 120X. . Further, since the elastic member substrate 33 is provided with press-fit fixing portions 36 and 37 that are positioned and fixed with respect to the holding portion 120X, for example, the holding member 20 including the optical element 10X equipped with the elastic member 30 on the holding portion 120X. When the mounting position of the elastic member 30 is adjusted, the elastic member 30 is inadvertently shifted, and accordingly, for example, it is avoided that the position adjustment of the holding member 20 including the optical element 10X is performed incorrectly. Therefore, the holding member 20 provided with the optical element 10X can be accurately provided in the holding unit 120X.
- the protrusions 36 and 37 are provided on the left and right side portions 33L and 33R in the front view of the elastic member substrate portion 33 of the elastic member 30 so that the horizontal position when the elastic member 30 is attached to the holding portion 120X is possible.
- occurrence of a lateral shift of the elastic member 30 when the holding member 20 including the optical element 10X is moved in the left-right direction DLR from the initial attachment position is prevented. Therefore, as a result, the contact position between the holding member 20 including the optical element 10X and the elastic member 30 is always stabilized. Along with this, it is possible to improve the stability and reliability of the initial performance in the mounting structure of the optical element 10X.
- the left and right side parts 33L / The inclined surface portions 36a, 36b / 37a, and 37b are formed on the press-fitting and fixing portion 36/37 of 33R so that the elastic member 30 can be easily attached to and detached from the holding portion 120X.
- inclined surface portions 36a, 36b / 37a, 37b are formed on the press-fit fixing portions 36/37 of the left and right side portions 33L / 33R in the front view of the spring base plate portion 33 constituting the elastic member 30, for example, press-fit having a substantially tapered shape.
- the pickup device 100X has a mounting structure for the optical element 10X.
- the holding member 20 including the optical element 10X is adjusted to the holding part 120X with high accuracy by the elastic member 30 and provided. Therefore, the pickup apparatus 100X having excellent optical characteristics can be configured.
- the OPU 100X having the mounting structure of the optical element 10X includes an optical element 10X that divides incident laser light into a plurality of optical elements 10X and an optical element.
- One holding member 20 equipped with 10X, the other holding member 25 equipped with one holding member 20, one holding member 20 equipped with the optical element 10X, and one holding member 20 are equipped.
- the optical element 10X is formed as a so-called grating, which is a diffraction grating 10X having a substantially rectangular plate shape in front view for emitting incident laser light divided into a plurality of parts. More specifically, the optical element 10X is formed as a so-called grating, which is a diffraction grating 10X having a substantially parallelogram in front view for emitting incident laser light divided into a plurality of parts.
- a diffraction grating and a holder spring 30 are used as the optical element and the holding member elastic member 30. Further, as the optical element and the holding member holding portion 120X, a diffraction grating and a holder holding portion 120X are used.
- the first holder 20 is used as the first holding member 20 that constitutes one holding member 20.
- a second holder 26 is used as the second holding member 25 that constitutes the other holding member 25.
- a substantially rectangular box-shaped housing chamber 129X having a substantially concave shape in front view constituting the diffraction grating and the holder holding portion 120X is used.
- the diffraction grating and the holder spring 30 are detachably press-fitted into the accommodation chamber 129X of the diffraction grating and the holder holding portion 120X, and the diffraction grating 10X and the second holder are inserted into the accommodation chamber 129X of the diffraction grating and the holder holding portion 120X.
- the accommodation chamber 129X of the diffraction grating and the holder holding portion 120X is generated by the restoring elastic force generated in the elastic bending pieces 31 and 32 of the diffraction grating and the spring 30 for the holder.
- the first holder 20 including the diffraction grating 10X and the second holder 26 is elastically held with high accuracy in a state in which the mounting position can be adjusted substantially along the left-right direction DLR and / or the vertical direction DDU and / or the rotation direction. Provided.
- the diffraction grating 10X is formed in a substantially rectangular plate shape in front view that is transparent or translucent to transmit laser light.
- the diffraction grating and the spring substrate portion 33 of the holder spring 30 are formed in a substantially concave shape when viewed from the front without being irradiated with laser light.
- the diffraction grating and the spring substrate portion 33 of the holder spring 30 are cut out in a substantially semi-oval shape, and a substantially semi-oval laser light transmitting portion 35 is formed in the diffraction grating and the spring substrate portion 33 of the holder spring 30. Has been.
- the laser beam is made to correspond to the diffraction grating adjusting hole 113 of the housing 110X, the interference of the laser beam to the elastic deflecting pieces 31 and 32 of the diffraction grating and the spring 30 for the holder is avoided, and further, for the diffraction grating and the holder In order to avoid the occurrence of a significant decrease in strength of the spring 30, the diffraction grating and the spring base portion 33 of the holder spring 30 are cut out in a substantially semi-oval shape.
- the elastic bending pieces 31 and 32 are The width is gradually narrowed from the bent portions 31b and 32b substantially corresponding to the bases of the elastic bending pieces 31 and 32 to the substantially semicircular tip portions 31a and 32a.
- the diffraction grating and the holder holding portion 120X are formed in a substantially concave shape that can pass through without being irradiated with laser light.
- the diffraction grating and the holder holding portion 120X are formed using synthetic resin.
- the diffraction grating provided with the protruding press-fit fixing portions 36 and 37, the elastic deflecting pieces 31 and 32, and the spring substrate portion 33 and the holder spring 30 are made of metal.
- the diffraction grating 10X is formed using synthetic resin or glass.
- the housing 110X that constitutes the OPU 100X and includes the diffraction grating and the holder holding portion 120X is excellent in, for example, electrical characteristics such as mechanical characteristics, sliding characteristics, dimensional stability, heat resistance, injection moldability, and insulation characteristics. Furthermore, it is formed using a heat-resistant synthetic resin composition based on a PAS resin such as a PPS resin that can be reduced in weight as compared with an iron material. For example, the resin material has a smaller specific gravity than iron and is suitable for weight reduction. For example, since synthetic resin materials such as PAS and PPS are generally softer than steel-based metal materials, when the diffraction grating spring 30 is attached to the diffraction grating of the housing 110 and the holder holding portion 120X, the resin resin is used.
- the protrusions 36/37 of the left and right side portions 33L / 33R of the spring base plate 33 constituting the steel-based metal diffraction grating spring 30 bite into the diffraction grating of the housing 110 and the holder holding portion 120X. .
- the housing 110X constituting the OPU 100X is made of a metal such as a non-ferrous metal or a die-cast alloy containing at least one element selected from the group consisting of aluminum (Al), magnesium (Mg), and zinc (Zn). Used to form. Aluminum, magnesium, and zinc are excellent in corrosion resistance and are non-ferrous metals having a specific gravity smaller than that of iron.
- the housing 110X is formed using a non-ferrous metal material such as an aluminum alloy containing aluminum as a main component.
- the diffraction grating spring 30 is attached to the diffraction grating of the housing 110X and the holder holding portion 120X.
- the protrusions 36/37 of the left and right side portions 33L / 33R of the spring base plate 33 constituting the steel diffraction grating spring 30 bite into the diffraction grating of the aluminum housing 110X and the holder holding portion 120X. It becomes.
- the diffraction grating and the holder spring 30 are equipped while accurately aligning the first holder 20 including the diffraction grating 10X and the second holder 26 within the diffraction grating of the housing 110X and the accommodating chamber 129X of the holder holding portion 120X. It is configured as a diffraction grating and a holder spring 30 that are used when making them.
- the spring base plate portion 33 constituting the diffraction grating and the holder spring 30 is provided with press-fit fixing portions 36 and 37 for positioning and fixing with respect to the diffraction grating and the holder holding portion 120X.
- the diffraction grating and the spring substrate 33 of the holder spring 30 are formed in a substantially plate shape having a substantially rectangular concave shape when viewed from the front. Further, the press-fitting and fixing portions 36 and 37 of the diffraction grating and the holder spring 30 are formed as a pair of protruding portions 36 and 37 protruding in a substantially trapezoidal shape on the left and right side portions 33L and 33R in the front view of the spring base plate portion 33. Yes.
- the press-fit fixing part 36/37 of the diffraction grating and the holder spring 30 can be easily and detachably equipped with the diffraction grating and the spring base part 33 of the holder spring 30 with respect to the diffraction grating and the holder holding part 120X. It is formed as a protruding portion 36/37 having a pair of gently tapered surface portions 36a, 36b / 37a, 37b.
- the spring base plate 33 is installed when the first holder 20 including the diffraction grating 10X and the second holder 26 is accurately positioned in the accommodation chamber 129X of the diffraction grating and the holder holding portion 120X, and the OPU 100X is assembled. After that, the spring substrate 33 is in contact with the first holder 20 including the diffraction grating 10X and the second holder 26 which are aligned. Also, a pair of elastic tongues 31 and 32 having a substantially tongue-like shape for generating a restoring elastic force with respect to the diffraction grating 10X and the first holder 20 including the second holder 26 and the diffraction grating and the holder holding portion 120X, The spring board portion 33 is extended.
- a substantially flat plate-like metal material constituting the diffraction grating and the holder spring 30 is folded back into a substantially inverted V shape in a side view at the bent portions 31b and 32b, and a pair of substantially tongue-shaped elastic bending pieces.
- 31 and 32 are extended substantially along the direction which distances with respect to the spring board
- the elastic bending pieces 31 and 32 of the diffraction grating including the spring base plate portion 33 and the elastic bending pieces 31 and 32 and the spring 30 for the holder are in a natural state, the elastic bending pieces 31/32 are bent approximately gently.
- a substantially oval tip 31a / 32a ahead of the portion 31c / 32c is substantially parallel to the spring base plate 33.
- a pair of substantially tongue-shaped elastic bending pieces 31 and 32 are formed to be folded with respect to the spring base plate 33, and the diffraction grating and the holder spring 30 are formed in, for example, a substantially inverted J shape that is inverted in a side view. Yes.
- the spring base plate 33 is in contact with the diffraction grating 10X, and the curved portion 31c / 32c of the elastic bending piece 31/32 is in contact with the diffraction grating and the holding chamber 129X of the holder holding portion 120X.
- the diffraction grating having the above-described form and the holder spring 30 are used as the leaf spring 30.
- this OPU 100X has a mounting structure for the diffraction grating 10X.
- the position is adjusted accurately. Therefore, the OPU 100X having excellent optical characteristics is configured.
- the diffraction grating of the housing 110X and the first holder 20 including the diffraction grating 10X and the second holder 26 are installed in the receiving chamber 129X of the holder holding portion 120X while being aligned, the diffraction grating 10X and the second holder 26 are mounted.
- the first holder 20 provided with the housing 110X, the diffraction grating provided together in the holding chamber 129X of the holder holding portion 120X, and the elastically deformed pieces 31 and 32 bent of the holder spring 30 are restored.
- the diffraction grating of the housing 110X and the holding chamber 120X of the holder holding portion 120X can be accurately placed in a state in which the mounting position can be adjusted substantially along the left-right direction DLR and / or the vertical direction DDU and / or the rotation direction Provided elastically held.
- the spring base plate portion 33 constituting the diffraction grating and the holder spring 30 is provided with press-fit fixing portions 36 and 37 for positioning and fixing with respect to the diffraction grating and the holder holding portion 120X, and the diffraction grating and the holder holding portion 120X.
- the diffraction grating and the holder spring 30 are detachably press-fitted into the storage chamber 129X, for example, the diffraction grating of the housing 110X and the storage chamber 129X of the holder holding portion 120X are equipped together with the diffraction grating and the holder spring 30.
- the mounting position of the first holder 20 including the diffraction grating 10X and the second holder 26 is adjusted substantially along the left-right direction DLR and / or the vertical direction DDU and / or the rotation direction
- the diffraction grating and the spring for the holder 30 is the diffraction grating of the housing 110X and the holder holding portion 120.
- the first holder 20 provided with the diffraction grating 10X and the second holder 26, for example, is inadvertently shifted along the left-right direction DLR and / or the up-down direction DDU and / or the rotation direction in the storage chamber 129X.
- the first holder 20 including the diffraction grating 10X and the second holder 26 is elastically held with high precision in the housing grating 129X of the housing 110X and the holder holding portion 120X.
- a pair of projecting portions 36 and 37 projecting in a substantially trapezoidal shape are provided on the left and right side portions 33L and 33R in the front view of the spring base plate 33 of the spring 30 for the holder 30 so that the diffraction grating of the housing 110X and Positioning substantially along the left-right direction DLR when the diffraction grating and the holder spring 30 are mounted in the holding chamber 129X of the holder holding portion 120X is possible, so-called lateral positioning is possible, and a substantially central boundary of the diffraction grating 10X For the diffraction grating and the holder when the first holder 20 provided with the diffraction grating 10X and the second holder 26 is moved substantially along the left-right direction DLR from the initial mounting position by adjusting the position of the line portion 16x so-called substantially central dividing line 16x.
- the contact position between the first holder 20 including the diffraction grating 10X and the second holder 26 and the diffraction grating and the spring 30 for the holder is always stabilized.
- the stability of the initial performance is improved in the mounting structure of the diffraction grating 10X, and the phase shift of the diffraction grating 10X is also improved in reliability evaluation in a thermal shock test or the like.
- the protrusions 36 and 37 of the diffraction grating and the holder spring 30 are protruded from the diffraction grating of the housing 110X and the holder holding part 120X, the holder spring 30 and / or the diffraction grating 10X, and the second holder.
- the projections 36/37 of the left and right side portions 33L / 33R of the spring base plate 33 constituting the diffraction grating and the spring 30 for the holder A pair of gentle tapered surface portions 36a, 36b / 37a, 37b are formed in the left / right / front view, and the protrusions 36/37 are formed in a substantially tapered shape so that they are diffracted with respect to the diffraction grating of the housing 110X and the holder holding portion 120X.
- the lattice and the holder spring 30 are detachably and easily attachable.
- a pair of loosely tapered surface portions 36a, 36b / 37a, left and right in front view, are formed on the protrusions 36/37 of the left and right side portions 33L / 33R of the spring substrate 33 constituting the diffraction grating and the holder spring 30.
- 37b is formed, and, for example, a projecting portion 36/37 having a substantially tapered shape is provided on the left and right side portions 33L / 33R in the front view of the spring base plate 33 constituting the diffraction grating and the spring 30 for the holder.
- the metal spring 30 bites into the diffraction grating of the resin so-called plastic housing 110X and the holder holding portion 120X.
- the rotation of the housing 110X with respect to the diffraction grating and the holder holding portion 120X The displacement prevention effect of the grid and the holder spring 30 can be expected.
- the mounting position of the first holder 20 including the diffraction grating 10X and the second holder 26 is adjusted, and the diffraction grating 10X and the second holder 26 are accurately placed in the diffraction grating of the housing 110X and the receiving chamber 129X of the holder holding portion 120X.
- the joining member / adhesive 200 is used, and the diffraction grating and the holder holding portion 120X in the housing chamber 129X of the diffraction grating of the housing 110X and the holder holding portion 120X are used. And / or the diffraction grating and the holder spring 30 are securely fixed.
- the first holder 20 including the diffraction grating and the holder spring 30 and / or the diffraction grating 10X and the second holder 26 is the diffraction grating of the housing 110X and the holder holding portion.
- the first holder 20 including the diffraction grating and the holder spring 30 and / or the diffraction grating 10X and the second holder 26 after the application / fixing of the joining member / adhesive 200 is mounted on the housing 120X.
- the 110X diffraction grating and the holder holding portion 120X are detachably mounted.
- the diffraction surface portion 10ax of the diffraction grating 10X includes a diffraction surface portion 10ax that divides the first laser wavelength light into at least one first main beam and two first sub beams, and a second laser wavelength.
- the diffractive surface portion 10ax that divides light into at least one second main beam and two second sub-beams is formed as one surface portion 10ax corresponding to diffraction of a plurality of types of laser wavelength light.
- the diffractive surface portion 10ax of the diffraction grating 10X has a fine periodic repeating periodic structure.
- the back surface portion 10bx opposite to the diffractive surface portion 10ax is formed, for example, as a smooth surface portion 10bx without forming a fine irregular repeating periodic structure on the back surface portion 10bx opposite to the diffractive surface portion 10ax constituting the diffraction grating 10X. Has been.
- An OPU 100X is configured.
- the diffraction surface portion 10ax of the diffraction grating 10X includes a diffraction surface portion 10ax that divides the first laser wavelength light into at least one first main beam and two first sub beams, and at least one second laser wavelength light. If it is formed as one surface portion 10ax corresponding to the diffraction of a plurality of types of laser wavelength light which also serves as the diffraction surface portion 10ax divided into the main beam and the two second sub beams, the first laser wavelength light first The main beam and the first sub beam are unnecessarily diffracted to reduce the efficiency of the first main beam and the first sub beam of the first laser wavelength light, or the second laser wavelength light is unnecessarily diffracted to the second laser wavelength. It is avoided that the efficiency of light is reduced.
- the diffractive surface portion 10ax that divides the first laser wavelength light into at least one first main beam and two first sub beams, and the second laser wavelength light at least one second main beam and two first sub beams.
- the diffraction surface portion 10ax of the diffraction grating 10X is formed as one surface portion 10ax corresponding to the diffraction of a plurality of types of laser wavelength light that also serves as the diffraction surface portion 10ax divided into two sub-beams.
- a reduced diffraction grating 10X is constructed. Since the processing portion, processing man-hours, etc. of the diffraction grating 10X are reduced, the price of the diffraction grating 10X can be kept low. Along with this, it becomes possible to configure the OPU 100X that can keep the price low.
- the diffraction grating 10X is provided with phase shift region portions 11x and 14x that generate a phase shift of ⁇ radians in a part of the laser light emitted from the LD.
- the diffraction grating 10X includes a substantially rectangular first region portion 11x, a substantially linear second region portion 12x adjacent to the first region portion 11x, and a substantially linear third region adjacent to the second region portion 12x.
- the region 13x is divided into at least four region portions 11x, 12x, 13x, and 14x, which are a substantially rectangular fourth region portion 14x adjacent to the third region portion 13x.
- the diffraction grating 10X is divided into a plurality of region portions 11x, 12x, 13x, and 14x.
- a predetermined periodic structure is configured in each of the region portions 11x, 12x, 13x, and 14x.
- the second region portion 12x and the third region portion 13x are drawn with a certain width for convenience. Yes.
- the second region portion 12x of the diffraction grating 10X and the third region portion 13x of the diffraction grating 10X have a thin line shape with a width 10w of about 20 to 200 ⁇ m, for example.
- the periodic structure of each of the region portions 11x, 12x, 13x, and 14x constituting the diffraction grating 10X is a fine concavo-convex repetitive periodic structure.
- the diffraction grating 10X is, for example, a glass plate or a plastic plate having a length and width of about 3 to 10 mm square and a thickness of about 0.3 to 5 mm.
- the error signal of the OPU 100X with respect to the signal surface portion Ma of the medium M is easily detected favorably.
- the tracking of the OPU 100X with respect to the signal surface portion Ma of the medium M is easily performed favorably. Since the diffraction grating 10X is divided into a plurality of region portions 11x, 12x, 13x, and 14x, the signal surface portion Ma of the medium M is irradiated with at least three independent light collection spots.
- an error signal such as a tracking error signal is recorded at the time of recording / playback of two or more kinds of media M having different track pitches. It is easy to avoid a decrease in the detection accuracy. Accordingly, it is possible to provide the OPU 100X that is easy to perform tracking control.
- the diffraction grating 10X is divided into even-numbered region portions 11x, 12x, 13x, and 14x.
- the condensing spot formed on the signal surface portion Ma of the medium M is formed as a highly accurate condensing spot.
- the second region 12x adjacent to the first region 11x and the first region 11x is formed by the boundary 16x between the second region 12x of the diffraction grating 10X and the third region 13x adjacent to the second region 12x.
- the diffraction grating 10X is at least bisected into one region 18x including the region 12x and the other region 19x including the third region 13x and the fourth region 14x adjacent to the third region 13x.
- the OPU 100X when the OPU 100X is equipped with the diffraction grating 10X, the light applied to the diffraction grating 10X is transmitted to one region 18x of the diffraction grating 10X and the other region 19x of the diffraction grating 10X. In addition, it becomes easy to be applied to a state of being almost equally divided.
- the diffraction grating 10X can be applied to the OPU 100X with high accuracy because the light is easily applied to the one region 18x of the diffraction grating 10X and the other region 19x of the diffraction grating 10X. It becomes easy to be provided. Therefore, it is easy to form a focused spot on the signal surface portion Ma of the medium M with high accuracy.
- the diffraction grating 10X is adjacent to the first region portion 11x, the second region portion 12x adjacent to the first region portion 11x and having a periodic structure different from the periodic structure of the first region portion 11x, and the second region portion 12x.
- the diffraction grating 10X is configured as a so-called quadrant type, inline grating.
- the OPU 100X is equipped with the diffraction grating 10X divided into the plurality of region portions 11x, 12x, 13x, and 14x, the error signal of the OPU 100X with respect to the signal surface portion Ma of the medium M is satisfactorily performed. For example, the tracking of the OPU 100X with respect to the signal surface portion Ma of the medium M is performed well. Since the diffraction grating 10X is divided into four region portions 11x, 12x, 13x, and 14x, the signal surface portion Ma of the medium M is irradiated with at least three independent condensing spots.
- the diffraction grating 10X is adjacent to the first region portion 18x and the third region portion 13x and the third region portion 13x.
- the region region 18x is substantially rectangular including the first region portion 11x and the second region portion 12x adjacent to the first region portion 11x.
- the other region portion 19x having a substantially rectangular shape including the fourth region portion 14x.
- the width 11w of the first region portion 11x of the diffraction grating 10X and the width 14w of the fourth region portion 14x are substantially equal.
- the width 12w of the second region portion 12x of the diffraction grating 10X and the width 13w of the third region portion 13x are substantially equal.
- the diffraction grating 10X is one of the constituent elements of the diffraction grating 10X by the boundary line portion 16x between the second region portion 12x of the diffraction grating 10X and the third region portion 13x of the diffraction grating 10X adjacent to the second region portion 12x.
- the region portion 18x and the other region portion 19x constituting the diffraction grating 10X are divided into two equal parts.
- the diffraction grating 10X is divided into even numbers.
- the condensing spot formed on the signal surface portion Ma of the medium M is formed as an accurate condensing spot.
- the diffraction grating 10X is bisected into one region 18x including the second region 12x and the other region 19x including the third region 13x and the fourth region 14x adjacent to the third region 13x.
- the laser light emitted from the LD and applied to the diffraction grating 10X is, for example, an optical axis (not shown).
- the optical axis is easily adjusted by an adjustment camera or the like.
- the laser light emitted from the LD and applied to the diffraction grating 10X and then transmitted through the OBL 133 can be observed using, for example, an optical axis adjustment camera.
- the laser beam is one of the substantially rectangular regions constituting the diffraction grating 10X.
- the portion 18x and the other substantially rectangular region portion 19x constituting the diffraction grating 10X are easily applied to a state of being equally divided into two.
- the laser beam is easily applied to one of the substantially rectangular region portions 18x constituting the diffraction grating 10X and the other substantially rectangular region portion 19x constituting the diffraction grating 10X. Accordingly, the first holder 20 including the diffraction grating 10X and the second holder 26 is easily provided while being accurately positioned and adjusted on the housing 110X of the OPU 100X. Therefore, it is easy to form a focused spot on the signal surface portion Ma of the medium M with high accuracy. Accordingly, tracking of the OPU 100X with respect to the signal surface portion Ma of the medium M is easily performed with high accuracy.
- a substantially rectangular plate-shaped diffraction grating 10X is installed in a substantially rectangular box-shaped storage chamber 24 of a substantially rectangular box-shaped first holder 20, and then the diffraction grating storage chamber 24 of the first holder 20 is mounted.
- An ultraviolet curable adhesive 200 which is a kind of electron beam curable adhesive 200, is applied to the subsequent pair of adhesive chambers 24 a and 24 b having a substantially semicircular recess shape, and then the electron beam curable adhesive 200.
- the adhesive 200 is solidified by irradiating the ultraviolet curable adhesive 200, which is a kind of electron beam, with ultraviolet rays, which is a kind of electron beam.
- the diffraction grating 10 ⁇ / b> X is bonded and fixed to the first holder 20.
- a substantially round hole of the second holder 26 having a substantially rectangular plate shape is fitted into the substantially cylindrical fitting portion 25 of the first holder 20 having a substantially rectangular box shape including the diffraction grating 10X having a substantially rectangular plate shape.
- the first holder 20 including the diffraction grating 10X is equipped with the second holder 26 in accordance with the fitting portion 27 having a shape.
- the 1st holder 20 provided with the diffraction grating 10X is equipped with the 2nd holder 26 so that rotation is possible.
- the first holder 20 including the second holder 26 and the diffraction grating 10X, and the diffraction grating and the holder spring 30 are provided in the accommodation chamber 129X of the diffraction grating of the housing 110X and the holder holding portion 120X.
- an ultraviolet curable adhesive 200 which is a kind of electron beam curable adhesive 200, is applied to the pair of left and right end surface portions 121 ⁇ / b> X and 122 ⁇ / b> X of the holding portion 120 ⁇ / b> X.
- 23 and a substantially central portion 28 at the lower end of the second holder 26 are coated with an ultraviolet curable adhesive 200, which is a kind of electron beam curable adhesive 200, and then a kind of electron beam curable adhesive 200.
- the ultraviolet curable adhesive 200 is irradiated with ultraviolet rays which are a kind of electron beam, and the adhesive 200 is solidified. Accordingly, the first holder 20 including the diffraction grating 10X and the second holder 26, and the diffraction grating and the holder spring 30 are accurately placed in the housing chamber 129X of the diffraction grating of the housing 110X and the holder holding portion 120X. Elastically held / fixed.
- This optical disk device is, for example, an optical disk device including an OPU 100X for a notebook PC.
- OPU 100X for a notebook PC.
- detailed description of the notebook PC optical disk device provided with the notebook PC OPU 100X is omitted.
- thermoplastic heat-resistant synthetic material that can be injection-molded and is colored transparently or translucently or used.
- the resin material the diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, and 133 are formed based on an injection molding method. More specifically, the diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, 133, and the like are made of, for example, an acrylic / methacrylic resin that is excellent in weather resistance, specular smoothness, accuracy, and the like and has high transparency. The composition is used and formed based on an injection molding process.
- methacrylic resin polymethyl methacrylate, and polymethyl methacrylate is abbreviated as PMMA, for example.
- the methacrylic resin is sometimes called an acrylic resin.
- the diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, 133, and the like, for example, have a composition based on a polycarbonate (PC: poly carbonate) resin that is excellent in workability and can be reduced in price. Things are used to form.
- PC polycarbonate
- the diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, and 133 are formed using a synthetic resin material, so that the diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, and 133 are formed. Can be reduced in weight.
- the synthetic resin diffraction gratings 10 and 10X, the holders 20 and 26, the OBLs 131, 132, and 133 are efficiently mass-produced based on the injection molding method.
- the price of the diffraction gratings 10, 10X, the holders 20, 26, the OBLs 131, 132, 133, etc. can be reduced. It is done.
- acrylonitrile butadiene styrene (ABS), polybutylene terephthalate (PBT), and polyamide (PA) are synthetic polymers that can be injection-molded and have thermoplastic properties.
- PEEK registered trademark
- PEAK poly aryl ether ketone
- the OPU 100 and the OPU 100X are mounted on the optical disc apparatus 1 that is assembled in, for example, a computer, an audio / video device, a game machine, an in-vehicle device (none of which is shown).
- the OPU 100, the OPU 100X, and the optical disk device including the OPU 100, the OPU 100X include, for example, a notebook personal computer PC, a laptop PC, a desktop PC, a computer such as an in-vehicle computer, a game machine such as a computer game machine, Can be installed in audio and / or video equipment such as CD players / CD recorders, DVD players / DVD recorders, “Blu-ray / Blu-ray Disc” players / “Blu-ray / Blu-ray Disc” recorders, etc.
- the OPU 100 and OPU 100X include a plurality of discs such as “CD” type optical disc, “DVD” type optical disc, “HD DVD” type optical disc, “CBHD” type optical disc, “Blu-ray / Blu-ray Disc” type optical disc, etc. It is supposed to be compatible with. Further, the OPU 100 and OPU 100X can be adapted to one optical disc having a plurality of signal surface portions.
- the OPU 100 and the OPU 100X are, for example, computers, audio and / or video equipment compatible with various optical disks such as “CD”, “DVD”, “HD DVD”, “CBHD”, “Blu-ray / Blu-ray Disc”, etc. It is possible to equip a game machine, an in-vehicle machine, etc. (both not shown).
- a repetitive periodic structure with fine irregularities is formed on the diffraction surface portion 10a of the diffraction grating 10 shown in FIG. 6, and the back surface on the opposite side of the diffraction surface portion 10a constituting the diffraction grating 10 is also repetitive with fine irregularities.
- the diffraction grating 10 in which the periodic structure is formed can also be used.
- a simple type diffraction grating having a simple region portion having another form (not shown). ) May be used.
- a two-divided diffraction grating having two region portions having other forms may be used.
- a three-divided diffraction grating having three region portions having other forms may be used.
- a four-divided diffraction grating including four region portions having other forms may be used instead of the four-divided diffraction gratings 10 and 10X including the four region portions 11, 12, 13, and 14.
- a four-divided diffraction grating including four region portions having other forms may be used instead of the four-divided diffraction gratings 10 and 10X including the four region portions 11, 12, 13, and 14.
- a four-divided diffraction grating including four region portions having other forms may be used.
- a fine irregular repeating periodic structure is formed on the diffraction surface portion 10ax of the diffraction grating 10X shown in FIGS. 11 to 13, and a back surface portion 10bx opposite to the diffraction surface portion 10ax constituting the diffraction grating 10X is also formed. It is also possible to use a diffraction grating 10X in which a fine concavo-convex repeating periodic structure is formed. Further, for example, instead of the four-divided type diffraction grating 10X having four region portions 11x, 12x, 13x, and 14x, a simple type diffraction grating (not shown) having a simple region portion having another form is provided. May be used.
- a two-divided type diffraction grating (not shown) having two region portions having other forms. ) May be used.
- a three-divided diffraction grating (not shown) having three region portions having other forms. ) May be used.
- a four-divided diffraction grating (not shown) having four regions having other forms. ) May be used.
- a double-sided diffraction surface type diffraction grating a simple type diffraction grating, and a multiple division type diffraction grating having a plurality of various regions.
- an optical element portion such as a resin diffraction grating portion is formed by integrally forming a resin diffraction grating portion on the resin first holder 20 shown in FIGS.
- a holding member such as a holder may be integrally formed.
- other optical elements such as a substantially rectangular plate-like half-wave plate are mounted on a holding member such as a holder having an optical element part such as a resin diffraction grating part.
- the first laser light is “DVD” standard red laser light having a wavelength of about 660 nm (first wavelength).
- This laser beam may be a blue-violet laser beam having a wavelength of about 405 nm (second wavelength) such as “HD DVD” standard, “CBHD” standard, or “Blu-ray / Blu-ray Disc” standard.
- the diffraction gratings 10 and 10X are composed only of diffraction grating members having a grating interval corresponding to a wavelength such as “HD DVD”, “CBHD”, or “Blu-ray / Blu-ray Disc” standards. Is done.
- the present invention includes, for example, “CD” (Compact Disc) (trademark), “DVD” (registered trademark) (Digital Versatile Disc), “HD DVD” (High Definition DVD) (registered trademark), “CBHD (China Blue High). -Definition) ”(ex.“ CH-DVD ”),“ Blu-ray / Blu-ray Disc ”(registered trademark), etc. Data, information, signals, etc. recorded on various media such as various optical discs such as optical discs that can be reproduced, writable or rewritable, or recorded on various media such as writable or rewritable optical discs, etc. Or delete It is possible pickup device, disk device, and an elastic member provided to, those that are applicable to the mounting structure of the optical element.
- 10,10X diffraction grating (optical element) 30
- Spring (elastic member) 31, 32
- Contact force generation part (flexible piece) 33
- Spring board part (elastic member board part) 33L, 33R Side part 36, 37 Protruding part (press-fit fixing part) 36a, 36b, 37a, 37b Tapered surface portion (inclined surface portion) 100,100X OPU (Pickup device) 120 Holder (holding part) 120X holder
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
Description
30 ばね(弾性部材)
31,32 当接力発生部(撓み片)
33 ばね基板部(弾性部材基板部)
33L,33R 側部
36,37 突出部(圧入固定部)
36a,36b,37a,37b テーパ面部(傾斜面部)
100,100X OPU(ピックアップ装置)
120 ホルダ(保持部)
120X 保持部
Claims (11)
- 光学素子の取付構造であって、
光学素子と、
前記光学素子を装備させるときに用いられる弾性部材と、
前記光学素子および前記弾性部材が装備される保持部と、
を備え、
前記保持部に前記弾性部材が圧入されると共に、前記弾性部材により前記保持部に前記光学素子が備えられた
ことを特徴とする。 - 請求項1に記載の光学素子の取付構造であって、
前記光学素子は、光が透過可能な正面視略矩形板状に形成され、
前記光学素子に対応して、前記弾性部材は、光が通過可能な正面視略凹状に形成された
ことを特徴とする。 - 請求項1又は2に記載の光学素子の取付構造であって、
前記保持部は、樹脂が用いられて形成され、
前記弾性部材は、金属が用いられて形成された
ことを特徴とする。 - 請求項1~3の何れか1項に記載の光学素子の取付構造であって、
前記光学素子は、入射された光を複数に分ける回折格子とされた
ことを特徴とする。 - 光学素子を保持部に位置合せさせつつ装備させるときに用いられる弾性部材であって、
弾性部材基板部に前記保持部に対して位置決め固定させる圧入固定部が備えられた
ことを特徴とする。 - 請求項5に記載の弾性部材であって、
前記弾性部材基板部は、略板状に形成され、
前記圧入固定部は、前記弾性部材基板部の正面視左右両側部に突出された突出部とされた
ことを特徴とする。 - 請求項5又は6に記載の弾性部材であって、
前記圧入固定部は、前記保持部に対して前記弾性部材基板部を着脱自在に装備可能とさせる傾斜面部を有する
ことを特徴とする。 - 請求項5~7の何れか1項に記載の弾性部材であって、
前記光学素子および前記保持部に対して復元弾性力を発生させる当接力発生部が前記弾性部材基板部に延設された
ことを特徴とする。 - 請求項8に記載の弾性部材であって、
前記弾性部材基板部に対し前記当接力発生部が折り返された
ことを特徴とする。 - 請求項1~4の何れか1項に記載の光学素子の取付構造であって、
前記弾性部材として、請求項5~9の何れか1項に記載の弾性部材が用いられた
ことを特徴とする。 - ピックアップ装置であって、
請求項1~4又は10の何れか1項に記載の光学素子の取付構造を有する
ことを特徴とする。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011534334A JPWO2011040573A1 (ja) | 2009-09-30 | 2010-09-30 | 弾性部材、光学素子の取付構造、並びに、それを備えるピックアップ装置 |
CN2010800542927A CN102770919A (zh) | 2009-09-30 | 2010-09-30 | 弹性部件、光学元件的安装结构以及具备它的拾取装置 |
US13/435,619 US8488422B2 (en) | 2009-09-30 | 2012-03-30 | Elastic member, mounting structure of optical element, and pickup apparatus having the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-227797 | 2009-09-30 | ||
JP2009227797 | 2009-09-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/435,619 Continuation US8488422B2 (en) | 2009-09-30 | 2012-03-30 | Elastic member, mounting structure of optical element, and pickup apparatus having the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011040573A1 true WO2011040573A1 (ja) | 2011-04-07 |
Family
ID=43826379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/067155 WO2011040573A1 (ja) | 2009-09-30 | 2010-09-30 | 弾性部材、光学素子の取付構造、並びに、それを備えるピックアップ装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8488422B2 (ja) |
JP (1) | JPWO2011040573A1 (ja) |
CN (1) | CN102770919A (ja) |
WO (1) | WO2011040573A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5370383B2 (ja) * | 2011-01-28 | 2013-12-18 | 船井電機株式会社 | 光学素子ホルダ及びそれを備えた光ピックアップ |
CN111323930A (zh) * | 2018-12-15 | 2020-06-23 | 三赢科技(深圳)有限公司 | 结构光发射模组、结构光感测模组及电子装置 |
JP2021131483A (ja) * | 2020-02-20 | 2021-09-09 | 株式会社日立エルジーデータストレージ | 光源モジュール |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS636523U (ja) * | 1986-06-30 | 1988-01-16 | ||
JPH0276320U (ja) * | 1988-11-29 | 1990-06-12 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05135382A (ja) | 1991-11-14 | 1993-06-01 | Ricoh Co Ltd | 光情報記録再生装置 |
KR100455394B1 (ko) * | 2002-08-27 | 2004-11-06 | 삼성전자주식회사 | 광픽업의 렌즈 위치 결정 장치 |
-
2010
- 2010-09-30 JP JP2011534334A patent/JPWO2011040573A1/ja active Pending
- 2010-09-30 CN CN2010800542927A patent/CN102770919A/zh active Pending
- 2010-09-30 WO PCT/JP2010/067155 patent/WO2011040573A1/ja active Application Filing
-
2012
- 2012-03-30 US US13/435,619 patent/US8488422B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS636523U (ja) * | 1986-06-30 | 1988-01-16 | ||
JPH0276320U (ja) * | 1988-11-29 | 1990-06-12 |
Also Published As
Publication number | Publication date |
---|---|
US8488422B2 (en) | 2013-07-16 |
CN102770919A (zh) | 2012-11-07 |
US20120250487A1 (en) | 2012-10-04 |
JPWO2011040573A1 (ja) | 2013-02-28 |
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