JP4180496B2 - Optical pickup device - Google Patents

Optical pickup device Download PDF

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JP4180496B2
JP4180496B2 JP2003399761A JP2003399761A JP4180496B2 JP 4180496 B2 JP4180496 B2 JP 4180496B2 JP 2003399761 A JP2003399761 A JP 2003399761A JP 2003399761 A JP2003399761 A JP 2003399761A JP 4180496 B2 JP4180496 B2 JP 4180496B2
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liquid crystal
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将慶 大矢
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Description

本発明は、光記録媒体に対する情報の記録、再生、消去に用いられる光ピックアップ装置に関する。   The present invention relates to an optical pickup device used for recording, reproducing, and erasing information on an optical recording medium.

光ピックアップ装置は、たとえばコンパクトディスク(略称CD)、デジタルバーサタイルディスク(略称DVD)などの光記録媒体に対して情報を記録、再生、消去することに用いられている。光ピックアップ装置には、情報信号品質向上の要求に応じ、光記録媒体の傾きおよび厚さのばらつき等よって発生する収差を補正し、集光特性を向上させることを目的として補正素子を備えるものがある(たとえば、特許文献1参照)。   An optical pickup device is used for recording, reproducing, and erasing information on an optical recording medium such as a compact disc (abbreviation CD) and a digital versatile disc (abbreviation DVD). An optical pickup device includes a correction element for the purpose of correcting aberrations caused by variations in tilt and thickness of an optical recording medium and improving light collection characteristics in response to a request for improvement in information signal quality. Yes (see, for example, Patent Document 1).

図10は、収差補正用液晶素子を備える従来の光ピックアップ装置1の構成を簡略化して示す配置側面図である。従来の光ピックアップ装置1は、たとえばCD、DVDの両方またはいずれか一方に、受発光一体型素子2を用いて情報を記録、再生、消去することができるように構成される。   FIG. 10 is an arrangement side view showing a simplified configuration of a conventional optical pickup device 1 including an aberration correcting liquid crystal element. The conventional optical pickup device 1 is configured such that information can be recorded, reproduced, and erased on, for example, a CD and / or a DVD by using the light receiving / emitting integrated element 2.

以下従来の光ピックアップ装置1の動作について説明する。光を出射する光源と、光記録媒体10からの戻り光を受光する受光素子とが一体化されている受発光一体型素子2から出射された放射光は、ダイクロイックプリズム3を反射または透過し、コリメートレンズ4で平行光とされた後、立上ミラー5によって集光レンズ6に導かれるように反射される。立上ミラー5によって反射された光は、集光レンズ6へ入射する前に収差補正用液晶素子7を透過し、このときの液晶の複屈折を利用することによって、光記録媒体10の傾きおよび厚さのばらつき等によって発生する収差が補正される。収差補正用液晶素子7によって収差が補正された光は、駆動手段8によって駆動制御可能に設けられる支持部材9に、収差補正用液晶素子7とともに支持される集光レンズ6を通過することによって、平行光が収束光とされ、光記録媒体10上の一点に収束し反射される。   The operation of the conventional optical pickup device 1 will be described below. Radiant light emitted from the light receiving and emitting integrated element 2 in which the light source that emits light and the light receiving element that receives the return light from the optical recording medium 10 are integrated is reflected or transmitted through the dichroic prism 3. After being collimated by the collimating lens 4, it is reflected by the upright mirror 5 so as to be guided to the condenser lens 6. The light reflected by the rising mirror 5 is transmitted through the aberration correction liquid crystal element 7 before entering the condenser lens 6, and by utilizing the birefringence of the liquid crystal at this time, the tilt of the optical recording medium 10 and Aberrations caused by thickness variations are corrected. The light whose aberration is corrected by the aberration correcting liquid crystal element 7 passes through the condenser lens 6 supported together with the aberration correcting liquid crystal element 7 on the support member 9 provided so as to be drive-controllable by the driving means 8. The parallel light is made into convergent light, and converges at one point on the optical recording medium 10 and is reflected.

光記録媒体10による反射光は、再び集光レンズ6を通過して戻る際に平行光となり、立上ミラー5で反射され、コリメートレンズ4を通過し、ダイクロイックプリズム3で反射または透過されて往路と逆の順路で受発光一体型素子2に戻る。戻り光は、受発光一体型素子2の表面の回折格子2aで分光され受光素子に備わる受光部へ入射し、光信号から電気信号へと変換され、情報の再生、記録、消去およびサーボ信号として利用される。なお、光ピックアップ装置1において、光記録媒体10を除く前述の各部材は、ハウジング11の中に収容されている。   The reflected light from the optical recording medium 10 becomes parallel light when returning through the condenser lens 6 again, reflected by the rising mirror 5, passed through the collimating lens 4, and reflected or transmitted by the dichroic prism 3. It returns to the light receiving / emitting integrated element 2 in the reverse route. The return light is split by the diffraction grating 2a on the surface of the light receiving / emitting integrated element 2 and incident on a light receiving portion provided in the light receiving element, converted from an optical signal to an electric signal, and as information reproduction, recording, erasing and servo signals. Used. In the optical pickup device 1, the above-described members except for the optical recording medium 10 are accommodated in a housing 11.

図11は、図10に示す光ピックアップ装置1における支持部材9に対する収差補正用液晶素子7の装着部を拡大して示す図である。従来の光ピックアップ装置1では、収差補正用液晶素子7の周縁部12が支持部材9の下端面13に当接し、収差補正用液晶素子7の端面14と支持部材9の下端面13とが、接着剤によって接着されている。   FIG. 11 is an enlarged view showing a mounting portion of the aberration correcting liquid crystal element 7 with respect to the support member 9 in the optical pickup device 1 shown in FIG. In the conventional optical pickup device 1, the peripheral edge portion 12 of the aberration correcting liquid crystal element 7 contacts the lower end surface 13 of the support member 9, and the end surface 14 of the aberration correcting liquid crystal element 7 and the lower end surface 13 of the support member 9 are It is bonded by an adhesive.

図10に例示するような光ピックアップ装置では、最近需要が非常に高まっている薄型ノートパソコンへの内蔵を可能にするために、DVDおよびCDの両方に対応する2つのレーザ光源を備える構成から、2種類の波長のレーザ光を1つのレーザ光源で出射可能にし、DVDおよびCDの両方に1つのレーザ光源で対応可能な構成を指向するようになり、一層の小型化が求められている。   In the optical pickup device as illustrated in FIG. 10, in order to enable incorporation into a thin notebook personal computer, for which demand has been extremely increasing recently, a configuration including two laser light sources corresponding to both DVD and CD, Laser light of two types of wavelengths can be emitted by a single laser light source, and a configuration that can be handled by a single laser light source for both DVD and CD is directed to further downsizing.

また高開口率(Numerical Aperture;略称NA)のレンズと、波長の短い青色光とを用いる次世代光ディスク(Blu-ray Disc;略称BD)システムでは、光記録媒体の光透過保護層の厚み誤差によって発生する球面収差等を補正することが必須となっている。このように、小型化を迫られるにも関わらず、信号品質向上のために収差補正用液晶素子のような光学部材を必要とするので、各部材の装着に許されるスペースが小さくなる傾向にあり、各部材が装着される設置台なども小さくすることが求められている。   In the next generation optical disc (Blu-ray Disc) system using a high numerical aperture (Numerical Aperture) lens and blue light with a short wavelength, the thickness error of the light transmission protective layer of the optical recording medium is caused. It is essential to correct the generated spherical aberration and the like. In this way, despite the need for miniaturization, an optical member such as an aberration correction liquid crystal element is required to improve the signal quality, so the space allowed for mounting each member tends to be small. In addition, it is required to reduce the installation table on which each member is mounted.

したがって、光ピックアップ装置への光学部品および液晶素子の装着に関しても、従来であれば接着剤を塗布するための箇所であって、接着面積を大きくするために凹所等が形成される部分(以後、接着だまりと呼ぶ)を設けることに対して制限を受けることがなかったハウジングおよび光学部品設置台においても、小型化への対応の結果、接着だまりを設けることによって強度低下の問題などが発生するので、接着だまりを設けることに制限を受けるようになる。   Therefore, regarding the mounting of the optical component and the liquid crystal element to the optical pickup device as well, it is a portion where the adhesive is conventionally applied, and a portion where a recess or the like is formed in order to increase the bonding area (hereinafter referred to as the portion). Even in a housing and an optical component mounting table that are not restricted by providing an adhesive pool, as a result of the reduction in size, there is a problem of strength reduction due to the provision of an adhesive pool. Therefore, it comes to be restricted in providing an adhesive pool.

光を透過、反射させて用いる液晶素子等の光制御素子には高い精度が求められており、たとえばBDシステムにおいては、現状光制御素子の装着部分を設けることが困難になるほどの小型化を要求されていないので、光制御素子の精度を優先し、光制御素子側に接着部分を設けることによって性能を劣化させてしまう危険をおかしてまで、光制御素子側に接着だまりを設ける必要性に迫られてはいない。しかしながら、さらなる小型化の要求に迫られて、光制御素子側に接着だまりを設けざるを得なくなるのは時間の問題である。   Light control elements such as liquid crystal elements that transmit and reflect light are required to have high precision. For example, in a BD system, it is necessary to reduce the size so that it is difficult to provide a mounting portion for the current light control element. Therefore, priority is given to the accuracy of the light control element, and there is a need to provide an adhesive pool on the light control element side until there is a risk of degrading performance by providing an adhesive part on the light control element side. It has not been done. However, due to the demand for further miniaturization, it is a matter of time that an adhesive pool must be provided on the light control element side.

近年、光学部品製造技術および加工技術が格段に進歩しているので、光制御素子側に接着だまり等を設けることは技術的に充分可能であり、また、光制御素子は使用されるレーザによって全ての部分を使用しているわけではなく、未使用部分も存在しているので、その未使用部分については加工可能であるにも関わらず、光制御素子側に接着だまりを設けることについては未だ試みられていない。   In recent years, since the optical component manufacturing technology and processing technology have advanced remarkably, it is technically possible to provide an adhesive pool etc. on the light control element side. This part is not used, and there is an unused part, so it is possible to process the unused part, but it is still an attempt to provide an adhesive pool on the light control element side. It is not done.

特開2000−285504号公報JP 2000-285504 A

本発明の目的は、光制御素子側に接着だまりを設け、光制御素子装着に係る接着強度を向上することによって、装着位置の経時変化、環境変化に伴うずれを防止し、高性能かつ長寿命の光ピックアップ装置を提供することである。   The object of the present invention is to provide a bonding pool on the light control element side and improve the adhesive strength related to the light control element mounting, thereby preventing the displacement of the mounting position with the passage of time and the environmental change, resulting in high performance and long life. An optical pickup device is provided.

本発明は、光を出射する光源と、光源から出射される光を光記録媒体に集光する集光レンズと、光源から出射される光の収差を補正する収差補正用液晶素子と、収差補正用液晶素子を支持する支持部材とを含む光ピックアップ装置において、
収差補正用液晶素子は、対向して設けられて液晶セルを構成する2枚の透明基板を備え、
透明基板の周縁部には、外方に臨んで基板凹所が形成され
持部材には、前記基板凹所を臨んで支持部材凹所が形成され、
収差補正用液晶素子の透明基板の基板凹所に臨む部分と支持部材の支持部材凹所に臨む部分とが、接着剤によって接着され
収差補正用液晶素子に備わる2枚の透明基板のうち、支持部材に当接する側の反対側に配置される透明基板には、
基板凹所の内寄りに、透明基板の表面から立上るようにしきり部が形成されることを特徴とする光ピックアップ装置である。
The present invention relates to a light source that emits light, a condensing lens that condenses light emitted from the light source onto an optical recording medium, an aberration correction liquid crystal element that corrects aberrations of light emitted from the light source, and aberration correction. In an optical pickup device including a support member for supporting a liquid crystal element for use
The aberration correcting liquid crystal element includes two transparent substrates that are provided opposite to each other to form a liquid crystal cell,
On the periphery of the transparent substrate, a substrate recess is formed facing outward ,
The supporting support member, the support member recess is formed to face the substrate recess,
The portion of the liquid crystal element for correcting aberration that faces the substrate recess of the transparent substrate and the portion of the support member that faces the support member recess are bonded by an adhesive ,
Of the two transparent substrates included in the liquid crystal element for correcting aberration, the transparent substrate disposed on the opposite side of the side in contact with the support member,
Inboard of the substrate recess, an optical pickup apparatus according to claim Rukoto partition portion is formed so as to stand rise from the surface of the transparent substrate.

また本発明は、収差補正用液晶素子の透明基板には、基板凹所が複数個形成され、1つの基板凹所の形状が、残余の基板凹所の形状と異なるように形成されることを特徴とする。   Further, according to the present invention, a plurality of substrate recesses are formed in the transparent substrate of the aberration correcting liquid crystal element, and the shape of one substrate recess is different from the shape of the remaining substrate recesses. Features.

また本発明は、収差補正用液晶素子の透明基板には、基板凹所が少なくとも3個以上形成され、
少なくとも3個以上形成される基板凹所が、収差補正用液晶素子に関して線対称、かつ放射状に配置されることを特徴とする。
In the present invention, at least three or more substrate recesses are formed in the transparent substrate of the aberration correcting liquid crystal element.
At least three or more substrate recesses are arranged symmetrically and radially with respect to the aberration correcting liquid crystal element.

本発明によれば、収差補正用液晶素子の液晶セルを構成する透明基板には基板凹所が形成され、透明基板の基板凹所に臨む部分と支持部材とが接着剤によって接着されるので、基板凹所形成部分の接着面積が増大し、収差補正用液晶素子の支持部材に対する接着強度を大きくすることができる。このことによって、収差補正用液晶素子の支持部材に対する装着位置の経年変化および温度変化が抑制されるので、情報信号の高品質化および装置の長寿命化が実現される。   According to the present invention, the substrate recess is formed in the transparent substrate constituting the liquid crystal cell of the aberration correcting liquid crystal element, and the portion facing the substrate recess of the transparent substrate and the support member are bonded by the adhesive, The adhesion area of the substrate recess formation portion increases, and the adhesion strength of the aberration correcting liquid crystal element to the support member can be increased. This suppresses the secular change and temperature change of the mounting position of the aberration correcting liquid crystal element with respect to the support member, thereby realizing high quality information signals and long life of the apparatus.

た、支持部材にも支持部材凹所が形成されるので、収差補正用液晶素子の支持部材に対する接着強度を一層増すことができる。 Also, since the support member recess is formed in the supporting member, it is possible to increase the adhesive strength to the support member of the aberration correcting liquid crystal element further.

た、収差補正用液晶素子の透明基板には、基板凹所の内寄りに、透明基板の表面から立上るようにしきり部が形成されるので、接着作業時に誤って収差補正用液晶素子の有効仕様領域、すなわち光の収差補正に用いられる領域に接着剤が付着することを防止できる。 Also, the transparent substrate of the aberration correcting liquid crystal element, the inner side of the substrate recess, since the partition portion as the surface rises of the transparent substrate is formed, the aberration correcting liquid crystal device by mistake at the time of bonding work It is possible to prevent the adhesive from adhering to the effective specification region, that is, the region used for correcting the aberration of light.

また本発明によれば、透明基板には、基板凹所が複数個形成され、1つの基板凹所の形状が、残余の基板凹所の形状と異なるように形成されるので、1つの基板凹所を、収差補正用液晶素子の位置決めに際して、基準指標とすることができる。このことによって、収差補正用液晶素子を装置本体に組立装着およびその位置決めを容易に行うことができる。   Further, according to the present invention, a plurality of substrate recesses are formed on the transparent substrate, and the shape of one substrate recess is different from the shape of the remaining substrate recesses. This can be used as a reference index when positioning the aberration correcting liquid crystal element. Thus, the aberration correcting liquid crystal element can be easily mounted and positioned on the apparatus main body.

また本発明によれば、収差補正用液晶素子の透明基板には、基板凹所が少なくとも3個以上形成され、少なくとも3個以上形成される基板凹所が、収差補正用液晶素子に関して線対称、かつ放射状に配置される。このことによって、基板凹所に塗布される接着剤が固化する際の収縮応力が、収差補正用液晶素子の透明基板に対して等方向に作用するので、透明基板が偏った方向にひずむことを防止できる。   According to the present invention, at least three substrate recesses are formed in the transparent substrate of the aberration correcting liquid crystal element, and at least three substrate recesses are line-symmetric with respect to the aberration correcting liquid crystal element. And they are arranged radially. As a result, the contraction stress when the adhesive applied to the substrate recess solidifies acts in the same direction with respect to the transparent substrate of the aberration correcting liquid crystal element, so that the transparent substrate is distorted in the biased direction. Can be prevented.

図1は、本発明の実施の一形態である光ピックアップ装置に備わる収差補正用液晶素子21と支持部材27との接着部分を示す断面図である。本発明の実施の一形態である光ピックアップ装置は、光を出射する光源と、光源から出射される光を光記録媒体に集光する集光レンズと、光源から出射される光の収差を補正する収差補正用液晶素子21と、収差補正用液晶素子21を支持する支持部材27とを含み、前述の図10に示す光ピックアップ装置と同一に構成されるので、構成の図示および説明を省略する。   FIG. 1 is a cross-sectional view showing an adhesion portion between an aberration correction liquid crystal element 21 and a support member 27 provided in an optical pickup device according to an embodiment of the present invention. An optical pickup device according to an embodiment of the present invention includes a light source that emits light, a condensing lens that collects light emitted from the light source onto an optical recording medium, and correction of aberrations of the light emitted from the light source. 10 includes an aberration correcting liquid crystal element 21 and a support member 27 that supports the aberration correcting liquid crystal element 21, and is configured in the same manner as the optical pickup device shown in FIG. .

本発明の光ピックアップ装置は、光ピックアップ装置に備わる収差補正用液晶素子21が、対向して設けられて液晶セル22を構成する2枚の第1および第2透明基板23,24を備え、第1および第2透明基板23,24のそれぞれの周縁部には、外方に臨んで第1および第2基板凹所25,26がそれぞれ形成され、第1および第2透明基板23,24の第1および第2基板凹所25,26に臨む部分と支持部材27とが、接着剤28によって接着されることを特徴とする。   The optical pickup device of the present invention includes two first and second transparent substrates 23 and 24 that are provided opposite to each other and that are provided with an aberration correction liquid crystal element 21 provided in the optical pickup device to constitute a liquid crystal cell 22. First and second substrate recesses 25 and 26 are respectively formed at the peripheral portions of the first and second transparent substrates 23 and 24 so as to face outward, and the first and second transparent substrates 23 and 24 The portions facing the first and second substrate recesses 25 and 26 and the support member 27 are bonded by an adhesive 28.

収差補正用液晶素子21は、2枚の第1および第2透明基板23,24によって形成される間隙に液晶29が充填されて構成される液晶セル22を含む。収差補正用液晶素子21は、後述するフレキシブル配線シートなどを介して、外部から電力が液晶セル22に供給されることによって液晶29の分子が回転動作し、その回転による光の複屈折などを利用して収差を補正する。   The aberration correcting liquid crystal element 21 includes a liquid crystal cell 22 configured by filling a liquid crystal 29 in a gap formed by two first and second transparent substrates 23 and 24. The aberration correcting liquid crystal element 21 uses the birefringence of light caused by the rotation of the molecules of the liquid crystal 29 when electric power is supplied to the liquid crystal cell 22 from the outside via a flexible wiring sheet, which will be described later. To correct the aberration.

第1および第2透明基板23,24は、たとえば透明ガラスまたは透明樹脂などから成り、それぞれの周縁部に外方に臨んで形成される第1および第2基板凹所25,26が、前述の接着だまりを構成する。   The first and second transparent substrates 23 and 24 are made of, for example, transparent glass or transparent resin, and the first and second substrate recesses 25 and 26 formed on the respective peripheral portions so as to face outward are formed as described above. Constructs an adhesive pool.

支持部材27は、たとえば硬質の樹脂または金属などから成る部材であり、本実施の形態では、収差補正用液晶素子21を支持するとともに、光記録媒体寄りに集光レンズも支持し、支持部材27と収差補正用液晶素子21および集光レンズとで一体化された部材を構成する。   The support member 27 is a member made of, for example, hard resin or metal. In the present embodiment, the support member 27 supports the aberration correcting liquid crystal element 21 and also supports the condenser lens closer to the optical recording medium. And the aberration correcting liquid crystal element 21 and the condenser lens constitute an integrated member.

第1透明基板23の一端部付近の支持部材を臨む面30と、支持部材27の第1透明基板23を臨む端面31とが当接され、第1および第2透明基板23,24の第1および第2基板凹所25,26と、支持部材27の端面31とに接着剤28が塗布されて、収差補正用液晶素子21が支持部材27に対して接着固定される。   A surface 30 facing the support member near one end of the first transparent substrate 23 and an end surface 31 facing the first transparent substrate 23 of the support member 27 are brought into contact with each other, and the first of the first and second transparent substrates 23 and 24 is contacted. The adhesive 28 is applied to the second substrate recesses 25 and 26 and the end surface 31 of the support member 27, and the aberration correcting liquid crystal element 21 is bonded and fixed to the support member 27.

このように収差補正用液晶素子21の側に接着だまりである第1および第2基板凹所25,26を設けることによって、接着面積を増大させることができるので、接着強度を増すことが可能となる。このことによって、収差補正用液晶素子21の支持部材27に対する装着位置の経年変化および温度変化が抑制されるので、情報信号の高品質化および装置の長寿命化が実現される。   As described above, by providing the first and second substrate recesses 25 and 26 that are pools of adhesion on the aberration correcting liquid crystal element 21 side, the bonding area can be increased, and therefore the bonding strength can be increased. Become. As a result, the secular change and temperature change of the mounting position of the aberration correcting liquid crystal element 21 with respect to the support member 27 are suppressed, so that the quality of the information signal is improved and the life of the apparatus is extended.

図2は、本発明の実施の第2形態である光ピックアップ装置に備わる収差補正用液晶素子41と支持部材42との接着部分を拡大して示す断面図である。本実施の形態の光ピックアップ装置は、実施の第1形態の光ピックアップ装置に類似し、対応する部分については同一の参照符号を付して説明を省略する。   FIG. 2 is an enlarged cross-sectional view showing an adhesion portion between the aberration correcting liquid crystal element 41 and the support member 42 provided in the optical pickup device according to the second embodiment of the present invention. The optical pickup device according to the present embodiment is similar to the optical pickup device according to the first embodiment, and corresponding portions are denoted by the same reference numerals and description thereof is omitted.

本実施の形態の光ピックアップ装置における支持部材42には、収差補正用液晶素子41を臨んで支持部材凹所43が形成され、収差補正用液晶素子41の第1および第2透明基板23,44の第1および第2基板凹所25,26に臨む部分と支持部材42の支持部材凹所43に臨む部分とが、接着剤28によって接着される。また収差補正用液晶素子41に備わる2枚の第1および第2透明基板23,44のうち、支持部材42に当接する側の反対側に配置される第2透明基板44には、第2基板凹所26の内寄りに、第2透明基板44の表面45から立上るようにしきり部46が形成される。なお第1および第2透明基板23,44と、第1および第2透明基板23,44によって形成される間隙に充填される液晶29とが、液晶セル47を構成する。   A support member recess 43 is formed on the support member 42 in the optical pickup device of the present embodiment so as to face the aberration correcting liquid crystal element 41, and the first and second transparent substrates 23 and 44 of the aberration correcting liquid crystal element 41 are formed. The portion facing the first and second substrate recesses 25 and 26 and the portion facing the support member recess 43 of the support member 42 are bonded by the adhesive 28. Of the two first and second transparent substrates 23 and 44 provided in the aberration correcting liquid crystal element 41, the second transparent substrate 44 disposed on the opposite side to the side in contact with the support member 42 includes a second substrate. A recess 46 is formed on the inner side of the recess 26 so as to rise from the surface 45 of the second transparent substrate 44. The first and second transparent substrates 23 and 44 and the liquid crystal 29 filled in the gap formed by the first and second transparent substrates 23 and 44 constitute a liquid crystal cell 47.

しきり部46は、第2基板凹所26の内寄りにかつ第2透明基板44の周縁に沿って、その内方に領域を画するように形成されることが好ましい。このようにしきり部46が形成されることによって、たとえば接着部に接着剤を誤って多量に塗布したような場合でも、しきり部46が、収差補正用液晶素子41の中央部へ向って接着剤が流動することを、阻止するので、収差補正用液晶素子41の有効仕様領域、すなわち光の収差補正に用いられる領域に接着剤が付着することを防止できる。また支持部材42側にも、接着だまりである支持部材凹所43を形成することによって、収差補正用液晶素子41の支持部材42に対する接着強度を一層増すことができるようになる。   The threshold 46 is preferably formed so as to define a region inward of the second substrate recess 26 and along the periphery of the second transparent substrate 44. By forming the cut-off portion 46 in this way, the cut-off portion 46 is directed toward the central portion of the aberration correcting liquid crystal element 41 even when, for example, a large amount of adhesive is mistakenly applied to the bond portion. Therefore, it is possible to prevent the adhesive from adhering to the effective specification region of the aberration correcting liquid crystal element 41, that is, the region used for light aberration correction. Further, by forming the support member recess 43 that is a bonding pool on the support member 42 side, the adhesive strength of the aberration correcting liquid crystal element 41 to the support member 42 can be further increased.

図3は、本発明の実施の第3形態である光ピックアップ装置に備わる収差補正用液晶素子51と支持部材52との接着部分を示す断面図である。本実施の形態の光ピックアップ装置において注目すべき点は、以下のことである。収差補正用液晶素子51は、対向して設けられて液晶セル53を構成する2枚の第1および第2透明基板54,55を備え、2枚の第1および第2透明基板54,55のうち、支持部材52を臨んで設けられる第1透明基板54には、第1透明基板54から突出するように係合突起56が形成される。支持部材52には、収差補正用液晶素子51を臨んで係合凹所57が形成され、第1透明基板54の係合突起56と支持部材52の係合凹所57とが係合されるとともに、第1透明基板54の係合突起56と支持部材52の係合凹所57に臨む部分とが、接着剤28によって接着される。   FIG. 3 is a cross-sectional view showing an adhesion portion between the aberration correcting liquid crystal element 51 and the support member 52 provided in the optical pickup device according to the third embodiment of the present invention. The following points should be noted in the optical pickup device according to the present embodiment. The aberration correcting liquid crystal element 51 includes two first and second transparent substrates 54 and 55 which are provided opposite to each other to form the liquid crystal cell 53. The two first and second transparent substrates 54 and 55 Among them, an engagement protrusion 56 is formed on the first transparent substrate 54 provided facing the support member 52 so as to protrude from the first transparent substrate 54. An engagement recess 57 is formed in the support member 52 so as to face the aberration correcting liquid crystal element 51, and the engagement protrusion 56 of the first transparent substrate 54 and the engagement recess 57 of the support member 52 are engaged. At the same time, the engagement protrusion 56 of the first transparent substrate 54 and the portion of the support member 52 facing the engagement recess 57 are bonded together by the adhesive 28.

このように、係合突起56と係合凹所57とを係合し、第1透明基板54の係合突起56と支持部材52の係合凹所57に臨む部分とを接着固定することによって、収差補正用液晶素子51の支持部材52に対する装着が容易になるとともに、接着強度を増大させることができる。   In this way, by engaging the engagement protrusion 56 and the engagement recess 57 and bonding and fixing the engagement protrusion 56 of the first transparent substrate 54 and the portion facing the engagement recess 57 of the support member 52. In addition, the mounting of the aberration correcting liquid crystal element 51 to the support member 52 is facilitated, and the adhesive strength can be increased.

なお、第1透明基板54の係合突起56と支持部材52の係合凹所57とを係合する場合、収差補正用液晶素子51の支持部材52に対する固定方法としては、接着に代えて溶着方法を用いることも可能である。   When the engagement protrusion 56 of the first transparent substrate 54 and the engagement recess 57 of the support member 52 are engaged, the method for fixing the aberration correcting liquid crystal element 51 to the support member 52 is welding instead of adhesion. It is also possible to use a method.

図4は、本発明の実施の第4形態である光ピックアップ装置に備わる収差補正用液晶素子61と支持部材62との接着部分を示す断面図である。本実施の形態の光ピックアップ装置は、実施の第1形態の光ピックアップ装置に類似し、対応する部分については同一の参照符号を付して説明を省略する。   FIG. 4 is a cross-sectional view showing an adhesion portion between the aberration correcting liquid crystal element 61 and the support member 62 provided in the optical pickup device according to the fourth embodiment of the present invention. The optical pickup device according to the present embodiment is similar to the optical pickup device according to the first embodiment, and corresponding portions are denoted by the same reference numerals and description thereof is omitted.

本実施の形態の光ピックアップ装置において注目すべきは、収差補正用液晶素子61の液晶セル63を構成する2枚の第1および第2透明基板64,24のうち、第1透明基板64がレンズ状に形成されるレンズ部64aを備えて集光レンズを構成し、集光レンズと収差補正用液晶素子61とが一体化されることである。したがって、本実施の形態の光ピックアップ装置では、第1透明基板64に形成されるレンズ部64aが、光源から出射され、収差補正用液晶素子61で収差の補正された光を光記録媒体に集光させるので、支持部材62の光記録媒体寄りに、別部材として集光レンズを設ける必要がない。   Of note in the optical pickup device of the present embodiment, of the two first and second transparent substrates 64 and 24 constituting the liquid crystal cell 63 of the aberration correcting liquid crystal element 61, the first transparent substrate 64 is a lens. In other words, the condensing lens is configured to include the lens portion 64a formed in a shape, and the condensing lens and the aberration correcting liquid crystal element 61 are integrated. Therefore, in the optical pickup device of the present embodiment, the lens portion 64a formed on the first transparent substrate 64 collects the light, which is emitted from the light source and whose aberration is corrected by the aberration correcting liquid crystal element 61, on the optical recording medium. Since the light is emitted, it is not necessary to provide a condensing lens as a separate member near the optical recording medium of the support member 62.

このように、集光レンズと収差補正用液晶素子61とが一体化され、1つの収差補正用液晶素子61でレーザ光の収差補正と集光とを行うことが可能になり、光ピックアップ装置の光学部品点数を減らすことができるので、装置の小型化を実現することができる。   In this way, the condensing lens and the aberration correcting liquid crystal element 61 are integrated, and it becomes possible to perform the aberration correction and condensing of the laser light with one aberration correcting liquid crystal element 61, and the optical pickup device Since the number of optical components can be reduced, the apparatus can be downsized.

なお、第2透明基板24には、フレキシブル配線シート65が接続される。フレキシブル配線シート65は、たとえば可撓性を有する樹脂フィルムなどの上に銅配線をプリントしたものであり、電源と収差補正用液晶素子61とを電気的に接続し、電源から収差補正用液晶素子61に電力を供給する。   A flexible wiring sheet 65 is connected to the second transparent substrate 24. The flexible wiring sheet 65 is obtained by printing copper wiring on a flexible resin film, for example, and electrically connects the power source and the aberration correcting liquid crystal element 61, and the aberration correcting liquid crystal element is connected from the power source. Power is supplied to 61.

図5は、本発明の実施の第5形態である光ピックアップ装置に備わる収差補正用液晶素子71と支持部材72との接着部分を示す底面図である。本実施の形態の光ピックアップ装置における収差補正用液晶素子71は、平面(底面)形状が円形になるように形成され、収差補正用液晶素子71の第1および第2透明基板73(第1透明基板は不図示)には、複数(本実施の形態では6個)の基板凹所(以後、第11〜第16基板凹所と呼ぶ)74a,74b,74c,74d,74e,74fが形成される。   FIG. 5 is a bottom view showing an adhesion portion between the aberration correcting liquid crystal element 71 and the support member 72 provided in the optical pickup device according to the fifth embodiment of the present invention. The aberration correcting liquid crystal element 71 in the optical pickup device of the present embodiment is formed so that the plane (bottom surface) shape is circular, and the first and second transparent substrates 73 (first transparent substrates) of the aberration correcting liquid crystal element 71 are formed. A plurality of (six in this embodiment) substrate recesses (hereinafter referred to as the 11th to 16th substrate recesses) 74a, 74b, 74c, 74d, 74e, 74f are formed in the substrate (not shown). The

第11〜第16基板凹所74a,74b,74c,74d,74e,74fは、円形に形成される収差補正用液晶素子71の軸線75に対して直交する仮想線76に関して線対称、かつ軸線75を中心にして放射状に配置されることを特徴とする。また第11基板凹所74aの形状が、残余の第12〜第16基板凹所74b,74c,74d,74e,74fの形状と異なるように形成される。本実施の形態では、第11基板凹所74aが、平面図上で略台形状に形成され、第12〜第16基板凹所74b,74c,74d,74e,74fが、平面図上で略半円形状に形成される。   The 11th to 16th substrate recesses 74 a, 74 b, 74 c, 74 d, 74 e, 74 f are symmetrical with respect to a virtual line 76 orthogonal to the axis 75 of the aberration correcting liquid crystal element 71 formed in a circle, and the axis 75 It is characterized by being arranged radially with respect to the center. The eleventh substrate recess 74a is formed to be different from the shapes of the remaining twelfth to sixteenth substrate recesses 74b, 74c, 74d, 74e, and 74f. In the present embodiment, the eleventh substrate recess 74a is formed in a substantially trapezoidal shape on the plan view, and the twelfth to sixteenth substrate recesses 74b, 74c, 74d, 74e, and 74f are approximately half on the plan view. It is formed in a circular shape.

このように収差補正用液晶素子71を円形に形成することによって、収差補正用液晶素子71を容易に回転させることが可能になる。このことによって、液晶セルを構成する2枚の透明基板の有する複屈折の影響が、レーザ光の偏光方向に対して最も影響の少なくなるように、収差補正用液晶素子71を回転させて位置調整することができる。また第11基板凹所74aの形状を、残余の第12〜第16基板凹所74b,74c,74d,74e,74fの形状と異なるように形成することによって、第11基板凹所74aを、収差補正用液晶素子71の位置決めに際して、基準指標とすることができるので、収差補正用液晶素子71の装置本体への組立装着およびその位置決めを容易に行うことができる。   By thus forming the aberration correcting liquid crystal element 71 in a circular shape, the aberration correcting liquid crystal element 71 can be easily rotated. Accordingly, the aberration correction liquid crystal element 71 is rotated to adjust the position so that the influence of birefringence of the two transparent substrates constituting the liquid crystal cell has the least influence on the polarization direction of the laser light. can do. Further, by forming the eleventh substrate recess 74a different from the shapes of the remaining twelfth to sixteenth substrate recesses 74b, 74c, 74d, 74e, and 74f, the eleventh substrate recess 74a has an aberration. Since the reference index can be used when positioning the correction liquid crystal element 71, assembly and mounting of the aberration correction liquid crystal element 71 on the apparatus main body and its positioning can be easily performed.

さらに第11〜第16基板凹所74a,74b,74c,74d,74e,74fが、収差補正用液晶素子71の軸線75に直交する仮想線76に関して線対称、かつ軸線75を中心として放射状に配置されるので、第11〜第16基板凹所74a,74b,74c,74d,74e,74fにそれぞれ塗布される接着剤77a,77b,77c,77d,77e,77fが固化する際の収縮応力が、収差補正用液晶素子71の第1および第2透明基板73(第1透明基板は不図示)に対して等方向に引張応力として作用するので、第1および第2透明基板73が偏った方向にひずむことを防止できる。   Further, the 11th to 16th substrate recesses 74 a, 74 b, 74 c, 74 d, 74 e, 74 f are arranged symmetrically with respect to the virtual line 76 orthogonal to the axis 75 of the aberration correcting liquid crystal element 71, and are arranged radially about the axis 75. Therefore, the shrinkage stress when the adhesives 77a, 77b, 77c, 77d, 77e, 77f applied to the 11th to 16th substrate recesses 74a, 74b, 74c, 74d, 74e, 74f are solidified, respectively, Since the first and second transparent substrates 73 (the first transparent substrate is not shown) of the aberration correcting liquid crystal element 71 act as a tensile stress in the same direction, the first and second transparent substrates 73 are biased in the biased direction. It can be prevented from being distorted.

参考までに、図6に、本発明範囲外の収差補正用液晶素子7と支持部材9との接着状態を底面図にて示す。本発明範囲外の光ピックアップ装置における収差補正用液晶素子7と支持部材9との接着においては、接着剤15a,15bが、平面図上で長方形に形成される収差補正用液晶素子7の軸線16に直交する仮想線17に関して単に線対称になるような配置で2箇所に、収差補正用液晶素子7と支持部材9とに接するように塗布される。この光ピックアップ装置では、接着剤15a,15bの固化時、図6中のx方向に平行であって、矢符18,19に示す方向に接着剤の固化収縮に起因する収縮応力が作用するので、収差補正用液晶素子7には、図6中のx方向に引張応力が作用し、図6中のy方向には圧縮応力が作用する。したがって、収差補正用液晶素子7は、x方向に伸び、y方向に縮む異方性の変形挙動を示す。収差補正用液晶素子7が、異方性の変形挙動を起こすと、電圧印加時の液晶分子の動作状態が変形前と異なるようになるので、設計時において想定している所望の収差補正を実現することができなくなる。   For reference, FIG. 6 is a bottom view showing an adhesion state between the aberration correcting liquid crystal element 7 and the support member 9 outside the scope of the present invention. In the adhesion between the aberration correcting liquid crystal element 7 and the support member 9 in the optical pickup device outside the scope of the present invention, the axis 15 of the aberration correcting liquid crystal element 7 in which the adhesives 15a and 15b are formed in a rectangular shape on the plan view. It is applied so as to be in contact with the aberration correcting liquid crystal element 7 and the support member 9 at two locations in an arrangement that is simply line-symmetric with respect to the virtual line 17 orthogonal to. In this optical pickup device, when the adhesives 15a and 15b are solidified, the contraction stress caused by the solidification shrinkage of the adhesive acts in the direction indicated by the arrows 18 and 19 parallel to the x direction in FIG. The tensile stress acts on the aberration correcting liquid crystal element 7 in the x direction in FIG. 6, and the compressive stress acts in the y direction in FIG. Accordingly, the aberration correcting liquid crystal element 7 exhibits anisotropic deformation behavior that extends in the x direction and contracts in the y direction. When the aberration correction liquid crystal element 7 undergoes anisotropic deformation behavior, the operation state of the liquid crystal molecules at the time of voltage application becomes different from that before the deformation, so the desired aberration correction assumed at the time of design is realized. Can not do.

これに対して前述の本発明のように、収差補正用液晶素子71が等方性の変形挙動を起こす場合、変形前後における電圧印加時の液晶分子の動作状態にほとんど差異が無いので、所望の収差補正を実現することができる。   On the other hand, when the aberration correcting liquid crystal element 71 isotropically deformed as in the present invention described above, there is almost no difference in the operating state of the liquid crystal molecules when the voltage is applied before and after the deformation. Aberration correction can be realized.

図7は、本発明の実施の第6形態である光ピックアップ装置に備わる収差補正用液晶素子81と支持部材82との接着部分を示す図である。図7(a)には、z方向の上方から見た平面図を示し、図7(b)には、側面図を示す。   FIG. 7 is a diagram showing an adhesion portion between the aberration correcting liquid crystal element 81 and the support member 82 provided in the optical pickup device according to the sixth embodiment of the present invention. FIG. 7A shows a plan view seen from above in the z direction, and FIG. 7B shows a side view.

本実施の形態の支持部材82は、外形が直方体形状に形成される。支持部材82には、厚み方向に貫通するレンズ装着孔83が形成され、レンズ装着孔83の光記録媒体寄りには、集光レンズ84が装着される。また支持部材82には、レンズ装着孔83の延びる方向に対して直交する方向に延びて嵌合凹所85が形成される。嵌合凹所85は、支持部材82の内部を厚みの薄い直方体形状に刳り貫いて形成される。嵌合凹所85は、支持部材82をレンズ装着孔83に直交する方向に貫通して形成されてもよく、凹所底面86を有するように形成されてもよい。ただし、凹所底面86を有するように形成される場合、収差補正用液晶素子81に接続されるフレキシブル配線シート65が挿通することができるように、凹所底面86に貫通孔87が形成される。   The support member 82 of the present embodiment has a rectangular parallelepiped shape. A lens mounting hole 83 that penetrates in the thickness direction is formed in the support member 82, and a condenser lens 84 is mounted near the optical recording medium in the lens mounting hole 83. The support member 82 has a fitting recess 85 extending in a direction orthogonal to the direction in which the lens mounting hole 83 extends. The fitting recess 85 is formed by penetrating the inside of the support member 82 into a thin rectangular parallelepiped shape. The fitting recess 85 may be formed so as to penetrate the support member 82 in a direction orthogonal to the lens mounting hole 83, or may be formed to have a recess bottom surface 86. However, in the case where the recess bottom surface 86 is formed, the through hole 87 is formed in the recess bottom surface 86 so that the flexible wiring sheet 65 connected to the aberration correcting liquid crystal element 81 can be inserted. .

収差補正用液晶素子81は、支持部材82に形成される嵌合凹所85に挿入されて嵌合されることによって支持される。このように、収差補正用液晶素子81を支持部材82に装着するに際し、収差補正用液晶素子81を、支持部材82の嵌合凹所85に挿入させて嵌合するだけでよいので、位置決めを容易にすることができる。また、支持部材82に嵌合された収差補正用液晶素子81の外方に臨む端面88の全体に接着剤28を塗布し、接着固定することができるので、充分な接着強度を得ることができる。   The aberration correcting liquid crystal element 81 is supported by being inserted and fitted into a fitting recess 85 formed in the support member 82. As described above, when the aberration correcting liquid crystal element 81 is mounted on the support member 82, the aberration correcting liquid crystal element 81 only needs to be inserted into the fitting recess 85 of the support member 82 and fitted. Can be easily. Further, since the adhesive 28 can be applied and fixed to the entire end face 88 facing the outside of the aberration correcting liquid crystal element 81 fitted to the support member 82, sufficient adhesive strength can be obtained. .

図8は、本発明の実施の第7形態である光ピックアップ装置に備わる収差補正用液晶素子91と支持部材92との接着部分を示す図である。図8(a)には、断面図を示し、図8(b)には、z方向の下方から見た底面図を示す。   FIG. 8 is a diagram showing an adhesion portion between the aberration correcting liquid crystal element 91 and the support member 92 provided in the optical pickup device according to the seventh embodiment of the present invention. FIG. 8A shows a cross-sectional view, and FIG. 8B shows a bottom view seen from below in the z direction.

本実施の形態の光ピックアップ装置における収差補正用液晶素子91は、対向して設けられて液晶セル93を構成する2枚の第1および第2透明基板94,95を備え、第1および第2透明基板94,95の周縁付近には、第1および第2透明基板94,95を厚み方向に貫通する複数の接着孔(本実施の形態では、一方の側にそれぞれ3個)が形成される。   The liquid crystal element 91 for correcting aberrations in the optical pickup device according to the present embodiment includes two first and second transparent substrates 94 and 95 that are provided opposite to each other to form the liquid crystal cell 93. Near the periphery of the transparent substrates 94 and 95, a plurality of adhesive holes (three in each side on one side) penetrating the first and second transparent substrates 94 and 95 in the thickness direction are formed. .

第1透明基板94に形成される3個の装着孔を、第11〜第13装着孔96a,96b,96cと呼び、第2透明基板95に形成される3個の装着孔を、第21〜第23装着孔97a,97b,97cと呼ぶ。なお、液晶セル93の第1透明基板94と第2透明基板95との間には、液晶29が充填される。   The three mounting holes formed in the first transparent substrate 94 are referred to as the 11th to 13th mounting holes 96a, 96b, and 96c, and the three mounting holes formed in the second transparent substrate 95 are the 21st to 21st mounting holes. Called the 23rd mounting holes 97a, 97b, 97c. The liquid crystal 29 is filled between the first transparent substrate 94 and the second transparent substrate 95 of the liquid crystal cell 93.

支持部材92には、第1および第2透明基板94,95の第11〜第13装着孔96a,96b,96cおよび第21〜第23装着孔97a,97b,97cに対応する位置にここでは3個の第1〜第3支持部材凹所(第1および第3支持部材凹所は不図示であり、第2支持部材凹所99bのみ図示)が形成される。3個の第1〜第3支持部材凹所99bと、第11〜第13装着孔96a,96b,96cおよび第21〜第23装着孔97a,97b,97cとを、それぞれ位置合わせした後、該凹所と該装着孔とに接着剤28を流入塗布する。このようにして、第1および第2透明基板94,95の第11〜第13装着孔96a,96b,96cおよび第21〜第23装着孔97a,97b,97cに臨む部分と、支持部材92の第1〜第3支持部材凹所99bに臨む部分とが、接着剤によって接着され、収差補正用液晶素子91が支持部材92に接着固定される。   The support member 92 has a position corresponding to the first to thirteenth mounting holes 96a, 96b, 96c and the first to twenty-third mounting holes 97a, 97b, 97c of the first and second transparent substrates 94, 95 in this case. First to third support member recesses (the first and third support member recesses are not shown, and only the second support member recess 99b is shown) are formed. After aligning the three first to third support member recesses 99b, the 11th to 13th mounting holes 96a, 96b, 96c and the 21st to 23rd mounting holes 97a, 97b, 97c, respectively, Adhesive 28 is applied by inflow to the recess and the mounting hole. In this manner, the portions of the first and second transparent substrates 94 and 95 facing the 11th to 13th mounting holes 96a, 96b, and 96c and the 21st to 23rd mounting holes 97a, 97b, and 97c, and the support member 92 The portions facing the first to third support member recesses 99 b are bonded by an adhesive, and the aberration correcting liquid crystal element 91 is bonded and fixed to the support member 92.

このことによって、支持部材92に接着だまりを形成する設計余裕が無い場合においても、収差補正用液晶素子91を支持部材92に設置することが可能になるので、光ピックアップ装置の小型化を実現することができる。   As a result, even when there is no design margin for forming an adhesive pool on the support member 92, the aberration correcting liquid crystal element 91 can be installed on the support member 92, so that the optical pickup device can be downsized. be able to.

図9は、本発明の実施の第8形態である光ピックアップ装置に備わる収差補正用液晶素子21と支持部材27との接着部分を示す底面図である。本実施の形態の光ピックアップ装置は、実施の第1形態の光ピックアップ装置に類似し、対応する部分については同一の参照符号を付して説明を省略する。   FIG. 9 is a bottom view showing an adhesion portion between the aberration correcting liquid crystal element 21 and the support member 27 provided in the optical pickup device according to the eighth embodiment of the present invention. The optical pickup device according to the present embodiment is similar to the optical pickup device according to the first embodiment, and corresponding portions are denoted by the same reference numerals and description thereof is omitted.

本実施の形態の光ピックアップ装置において注目すべきは、収差補正用液晶素子21に、収差補正用液晶素子21に電力を供給する複数のフレキシブル配線シート101(本実施の形態では第1〜第4の4つ)が接続され、4つの第1〜第4フレキシブル配線シート101a,101b,101c,101dは、波形の形状を有し、収差補正用液晶素子21に関して線対称に配置されることである。   It should be noted that in the optical pickup device of the present embodiment, a plurality of flexible wiring sheets 101 (first to fourth in the present embodiment) that supply power to the aberration correcting liquid crystal element 21 are supplied to the aberration correcting liquid crystal element 21. And the four first to fourth flexible wiring sheets 101a, 101b, 101c, and 101d have a waveform shape and are arranged in line symmetry with respect to the aberration correcting liquid crystal element 21. .

第1〜第4フレキシブル配線シート101a,101b,101c,101dが、波形、いわゆるコルゲートされた状態のものが設けられるので、第1〜第4フレキシブル配線シート101a,101b,101c,101dを介して収差補正用液晶素子21に応力が負荷されるとき、第1〜第4フレキシブル配線シート101a,101b,101c,101dのコルゲート部分が伸縮することによって、負荷される応力を緩和することができる。また第1〜第4フレキシブル配線シート101a,101b,101c,101dが、収差補正用液晶素子21の軸線102に直交する仮想線103に関して線対称、すなわち第1および第2フレキシブル配線シート101a,101bと、第4および第3フレキシブル配線シート101d,101cとが、仮想線103に関して対称になるように設けられるので、収差補正用液晶素子21を支持する支持部材27に負荷される力のバランスが保たれる。このことによって、収差補正用液晶素子21が接着支持される支持部材27に設けられるサーボ機構にかかる負担を軽減することができるので、サーボ機構の動作を安定させることが可能となる。   Since the first to fourth flexible wiring sheets 101a, 101b, 101c, and 101d are provided with a waveform, that is, a so-called corrugated state, an aberration is caused through the first to fourth flexible wiring sheets 101a, 101b, 101c, and 101d. When stress is applied to the correction liquid crystal element 21, the stress applied can be relaxed by the expansion and contraction of the corrugated portions of the first to fourth flexible wiring sheets 101a, 101b, 101c, and 101d. The first to fourth flexible wiring sheets 101a, 101b, 101c, and 101d are line-symmetric with respect to the virtual line 103 orthogonal to the axis 102 of the aberration correcting liquid crystal element 21, that is, the first and second flexible wiring sheets 101a and 101b. Since the fourth and third flexible wiring sheets 101d and 101c are provided so as to be symmetrical with respect to the virtual line 103, the balance of the force applied to the support member 27 that supports the aberration correcting liquid crystal element 21 is maintained. It is. As a result, the burden on the servo mechanism provided on the support member 27 to which the aberration correction liquid crystal element 21 is bonded and supported can be reduced, and the operation of the servo mechanism can be stabilized.

前述の実施の第1〜第8形態の各光ピックアップ装置は、CD、DVDなどの光記録媒体を使用する情報記録再生装置のような電子機器に搭載することができる。本発明の各形態の光ピックアップ装置を搭載する電子機器は、支持部材に対する収差補正用液晶素子の接着強度に優れ、収差補正用液晶素子の接着固定位置が、温度変化および経年変化によってずれを生じにくいので、情報信号品質に優れ、長寿命化が実現される。   Each of the optical pickup devices of the first to eighth embodiments described above can be mounted on an electronic device such as an information recording / reproducing device using an optical recording medium such as a CD or a DVD. The electronic apparatus equipped with the optical pickup device of each aspect of the present invention is excellent in the adhesive strength of the aberration correcting liquid crystal element to the support member, and the position where the aberration correcting liquid crystal element is fixed is displaced due to temperature change and secular change. Because it is difficult, it has excellent information signal quality and a long service life.

本発明の実施の一形態である光ピックアップ装置に備わる収差補正用液晶素子21と支持部材27との接着部分を示す断面図である。FIG. 4 is a cross-sectional view showing an adhesion portion between the aberration correcting liquid crystal element 21 and the support member 27 provided in the optical pickup device according to the embodiment of the present invention. 本発明の実施の第2形態である光ピックアップ装置に備わる収差補正用液晶素子41と支持部材42との接着部分を示す断面図である。It is sectional drawing which shows the adhesion part of the liquid crystal element 41 for aberration correction with which the optical pick-up apparatus which is 2nd Embodiment of this invention is equipped, and the support member 42. FIG. 本発明の実施の第3形態である光ピックアップ装置に備わる収差補正用液晶素子51と支持部材52との接着部分を示す断面図である。It is sectional drawing which shows the adhesion part of the liquid crystal element 51 for aberration correction with which the optical pick-up apparatus which is 3rd Embodiment of this invention is equipped, and the support member 52. FIG. 本発明の実施の第4形態である光ピックアップ装置に備わる収差補正用液晶素子61と支持部材62との接着部分を示す断面図である。It is sectional drawing which shows the adhesion part of the liquid crystal element 61 for aberration correction with which the optical pick-up apparatus which is 4th Embodiment of this invention is equipped, and the supporting member 62. FIG. 本発明の実施の第5形態である光ピックアップ装置に備わる収差補正用液晶素子71と支持部材72との接着部分を示す底面図である。It is a bottom view which shows the adhesion part of the liquid crystal element 71 for aberration correction with which the optical pick-up apparatus which is 5th Embodiment of this invention is equipped, and the supporting member 72. FIG. 本発明範囲外の収差補正用液晶素子7と支持部材9との接着状態を示す底面図である。FIG. 6 is a bottom view showing an adhesion state between the aberration correcting liquid crystal element 7 and the support member 9 outside the scope of the present invention. 本発明の実施の第6形態である光ピックアップ装置に備わる収差補正用液晶素子81と支持部材82との接着部分を示す図である。It is a figure which shows the adhesion part of the liquid crystal element 81 for aberration correction with which the optical pick-up apparatus which is 6th Embodiment of this invention is equipped, and the supporting member 82. FIG. 本発明の実施の第7形態である光ピックアップ装置に備わる収差補正用液晶素子91と支持部材92との接着部分を示す図である。It is a figure which shows the adhesion part of the liquid crystal element 91 for aberration correction with which the optical pick-up apparatus which is 7th Embodiment of this invention is equipped, and the supporting member 92. FIG. 本発明の実施の第8形態である光ピックアップ装置に備わる収差補正用液晶素子21と支持部材27との接着部分を示す底面図である。It is a bottom view which shows the adhesion part of the liquid crystal element 21 for aberration correction with which the optical pick-up apparatus which is 8th Embodiment of this invention is equipped, and the supporting member 27. FIG. 収差補正用液晶素子を備える従来の光ピックアップ装置1の構成を簡略化して示す配置側面図である。It is an arrangement side view showing a simplified configuration of a conventional optical pickup device 1 including an aberration correcting liquid crystal element. 図10に示す光ピックアップ装置1における支持部材9に対する収差補正用液晶素子7の装着部を拡大して示す図である。It is a figure which expands and shows the mounting part of the liquid crystal element 7 for aberration correction with respect to the support member 9 in the optical pick-up apparatus 1 shown in FIG.

符号の説明Explanation of symbols

21,41,51,61,71,81,91 収差補正用液晶素子
22,47,53,63,93 液晶セル
23,54,64,94 第1透明基板
24,44,55,73,95 第2透明基板
25 第1基板凹所
26 第2基板凹所
27,42,52,62,72,82,92 支持部材
28,77 接着剤
29 液晶
43,99 支持部材凹所
46 しきり部
65,101 フレキシブル配線シート
74 基板凹所
83 レンズ装着孔
84 集光レンズ
85 嵌合凹所
96,97 装着孔
21, 41, 51, 61, 71, 81, 91 Aberration correction liquid crystal element 22, 47, 53, 63, 93 Liquid crystal cell 23, 54, 64, 94 First transparent substrate 24, 44, 55, 73, 95 2 Transparent substrate 25 First substrate recess 26 Second substrate recess 27, 42, 52, 62, 72, 82, 92 Support member 28, 77 Adhesive 29 Liquid crystal 43, 99 Support member recess 46 Clearing portion 65, 101 Flexible wiring sheet 74 Substrate recess 83 Lens mounting hole 84 Condensing lens 85 Fitting recess 96, 97 Mounting hole

Claims (3)

光を出射する光源と、光源から出射される光を光記録媒体に集光する集光レンズと、光源から出射される光の収差を補正する収差補正用液晶素子と、収差補正用液晶素子を支持する支持部材とを含む光ピックアップ装置において、
収差補正用液晶素子は、対向して設けられて液晶セルを構成する2枚の透明基板を備え、
透明基板の周縁部には、外方に臨んで基板凹所が形成され
持部材には、前記基板凹所を臨んで支持部材凹所が形成され、
収差補正用液晶素子の透明基板の基板凹所に臨む部分と支持部材の支持部材凹所に臨む部分とが、接着剤によって接着され
収差補正用液晶素子に備わる2枚の透明基板のうち、支持部材に当接する側の反対側に配置される透明基板には、
基板凹所の内寄りに、透明基板の表面から立上るようにしきり部が形成されることを特徴とする光ピックアップ装置。
A light source that emits light, a condenser lens that condenses the light emitted from the light source onto an optical recording medium, an aberration correction liquid crystal element that corrects aberrations of the light emitted from the light source, and an aberration correction liquid crystal element In an optical pickup device including a supporting member to support,
The aberration correcting liquid crystal element includes two transparent substrates that are provided opposite to each other to form a liquid crystal cell,
On the periphery of the transparent substrate, a substrate recess is formed facing outward ,
The supporting support member, the support member recess is formed to face the substrate recess,
The portion of the liquid crystal element for correcting aberration that faces the substrate recess of the transparent substrate and the portion of the support member that faces the support member recess are bonded by an adhesive ,
Of the two transparent substrates included in the liquid crystal element for correcting aberration, the transparent substrate disposed on the opposite side of the side in contact with the support member,
Inboard of the substrate recess, is the partition section as the surface rises of the transparent substrate forming the optical pickup apparatus according to claim Rukoto.
収差補正用液晶素子の透明基板には、基板凹所が複数個形成され、1つの基板凹所の形状が、残余の基板凹所の形状と異なるように形成されることを特徴とする請求項記載の光ピックアップ装置。 The transparent substrate of the aberration correcting liquid crystal element is formed with a plurality of substrate recesses, and the shape of one substrate recess is different from the shape of the remaining substrate recesses. 1. The optical pickup device according to 1 . 収差補正用液晶素子の透明基板には、基板凹所が少なくとも3個以上形成され、
少なくとも3個以上形成される基板凹所が、収差補正用液晶素子に関して線対称、かつ放射状に配置されることを特徴とする請求項1または2に記載の光ピックアップ装置。
In the transparent substrate of the aberration correction liquid crystal element, at least three or more substrate recesses are formed,
Substrate recess formed at least three or more, the optical pickup apparatus according to claim 1 or 2, characterized in that it is arranged to be line symmetrical with respect to the aberration correcting liquid crystal element, and radially.
JP2003399761A 2003-11-28 2003-11-28 Optical pickup device Expired - Fee Related JP4180496B2 (en)

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JP2008305516A (en) * 2007-06-11 2008-12-18 Konica Minolta Opto Inc Optical element unit, optical pickup device and fixing method of optical element
JP6031373B2 (en) * 2013-02-13 2016-11-24 日立コンシューマエレクトロニクス株式会社 Optical component fixing structure, optical component fixing method, optical pickup device manufacturing method, and RGB three primary color light source module device manufacturing method
JP7342346B2 (en) * 2018-06-07 2023-09-12 Agc株式会社 Optical elements and devices

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US8400686B2 (en) 2008-12-10 2013-03-19 Ricoh Company, Ltd. Optical scanning device and image forming apparatus including same
JP2011145337A (en) * 2010-01-12 2011-07-28 Ricoh Co Ltd Method for fixing liquid crystal element, method for producing optical scanner, optical scanner and image forming apparatus

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