JPH048763B2 - - Google Patents
Info
- Publication number
- JPH048763B2 JPH048763B2 JP26825286A JP26825286A JPH048763B2 JP H048763 B2 JPH048763 B2 JP H048763B2 JP 26825286 A JP26825286 A JP 26825286A JP 26825286 A JP26825286 A JP 26825286A JP H048763 B2 JPH048763 B2 JP H048763B2
- Authority
- JP
- Japan
- Prior art keywords
- position adjustment
- lens
- lens position
- astigmatism lens
- pick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Lens Barrels (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明はピツクアツプヘツド（Pick−up−
Head、以下PUHという）用の非点収差
（Astigmatism、以下ASと略称する）レンズ置調
整装置の改良に係り、特にASレンズのASレンズ
位置調整用ガイドに対する傾きによる調整不良を
なくさんとするものである。[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention is directed to a pick-up head.
This invention relates to an improvement of the astigmatism (hereinafter referred to as AS) lens position adjustment device for the head (hereinafter referred to as PUH), and in particular eliminates poor adjustment due to the inclination of the AS lens with respect to the AS lens position adjustment guide. It is.
（従来の技術）
PUHは光学式デイスクプレーヤの信号再生の
為に使用されるものである。このPHUの中にフ
オトダイオード（以下PDという）が収容されて
おり、このPDにより光信号を電気信号に変換し
て信号を取り出す。上記PHU内にはASレンズが
設置されており、このASレンズによりデイスク
から反射してきたレーザ光がPDにて焦点を結ぶ
ように調整する。以下第３図を参照して説明す
る。第３図中符号１はPUHであり、図示しない
デイスクからの光は紙面に垂直な上方向から入射
してレンズ２を介して図中矢印で示す方向に反射
する。そして図示しない別のレンズを反射して
ASレンズ３に入射する。上記ASレンズ３を通過
した光はPD４に入射し、そこで焦点を結ぶ。上
記ASレンズ３はPHU１内に形成されたASレン
ズ位置調整用ガイド５内に収容されており、AS
レンズ位置調整用ドライバ６により上記ASレン
ズ位置調整用ガイド５内における位置を調整す
る。(Prior Art) PUH is used for signal reproduction of optical disc players. A photodiode (hereinafter referred to as PD) is housed in this PHU, and this PD converts an optical signal into an electrical signal and extracts the signal. An AS lens is installed inside the PHU, and this AS lens adjusts the laser beam reflected from the disk so that it is focused on the PD. This will be explained below with reference to FIG. Reference numeral 1 in FIG. 3 is a PUH, and light from a disk (not shown) enters from above perpendicular to the plane of the paper and is reflected via lens 2 in the direction indicated by the arrow in the figure. Then, it is reflected by another lens (not shown).
The light enters AS lens 3. The light that has passed through the AS lens 3 enters the PD 4 and is focused there. The AS lens 3 is housed in an AS lens position adjustment guide 5 formed inside the PHU 1, and the AS lens 3 is
The position within the AS lens position adjustment guide 5 is adjusted by the lens position adjustment driver 6.
上記ASレンズ位置調整用ドライバ６における
位置調整をさらに詳細に説明すると、まずASレ
ンズ３には位置調整用の溝７が形成されており、
この溝７内に先端が平らに形成された上記ASレ
ンズ位置調整用ドライバ６の先端部８を挿入す
る。これが第４図ａに示す状態である。次に第４
図ｂに示すようにASレンズ位置調整用ドライバ
６を時計方向に回転して、先端部８を溝７の壁に
当接させる。その状態でASレンズ３を第３図中
矢印で示す方向に適宜移動させて調整する。 To explain in more detail the position adjustment by the AS lens position adjustment driver 6, first, a position adjustment groove 7 is formed in the AS lens 3.
The tip 8 of the AS lens position adjustment driver 6, which has a flat tip, is inserted into the groove 7. This is the state shown in FIG. 4a. Then the fourth
As shown in FIG. b, the AS lens position adjustment driver 6 is rotated clockwise to bring the tip 8 into contact with the wall of the groove 7. In this state, adjust the AS lens 3 by appropriately moving it in the direction indicated by the arrow in FIG.
しかしながら上記構成によると以下のような問
題がある。すなわち第４図ｃに示すようにASレ
ンズ３がASレンズ３とASレンズ位置調整用ガイ
ド５とのがた分だけ傾いた状態で調整されること
がある。そのままの状態で機能すれば問題はない
のであるが、調整後は第５図に示すように固定用
ねじ９によりASレンズ３をASレンズ位置調整用
ガイド５に固定する操作がなされる為に、調整時
とその位置が異なることとなつてしまう。その結
果ASレンズ３とフオトダイオード４との距離が
微少範囲（ミクロンオーダ）で変化してしまい、
調整不良となつてしまう。 However, the above configuration has the following problems. That is, as shown in FIG. 4c, the AS lens 3 may be adjusted in a tilted state by the amount of play between the AS lens 3 and the AS lens position adjustment guide 5. There is no problem if it functions as is, but after adjustment, the AS lens 3 must be fixed to the AS lens position adjustment guide 5 using the fixing screw 9 as shown in Figure 5. This results in the position being different from that at the time of adjustment. As a result, the distance between the AS lens 3 and the photodiode 4 changes within a minute range (micron order).
This will result in poor adjustment.
（発明が解決しようとする問題点）
上述したようにASレンズを固定した場合に、
調整時における位置が変化して調整不良となると
いう問題があり、本発明はこのような点に基づい
てなされたものでその目的とするところは、上記
調整不良を確実に無くすことが可能なピツクアツ
プヘツド用の非点収差レンズ位置調整装置を提供
することにある。(Problem to be solved by the invention) When the AS lens is fixed as described above,
There is a problem that the position changes during adjustment, resulting in poor adjustment.The present invention has been made based on this point, and its object is to provide a pick-up that can reliably eliminate the above-mentioned poor adjustment. An object of the present invention is to provide an astigmatism lens position adjustment device for a head.
［発明の構成］
（問題点を解決するための手段）
すなわち本発明は、光学式デイスクプレーヤの
ピツクアツプヘツド内に形成された非点収差レン
ズ位置調整用ガイド内に収容された非点収差レン
ズを上記非点収差レンズ位置調整用ガイドに沿つ
て適宜摺動させることによりデイスクより反射し
た光がフオトダイオードで焦点を結ぶように調整
するピツクアツプヘツド用の非点収差レンズ位置
調整装置において、上記ピツクアツプヘツドの外
に配置され中空部を備えたホルダと、このホルダ
の中空部内に摺動可能に収容され先端がエツジ状
に形成され上記非点収差レンズに形成された溝に
挿入される非点収差レンズ位置調整用ピンと、上
記中空部に収容され上記非点収差レンズ位置調整
用ピンを上記非点収差レンズ方向に付勢する弾性
部材と、上記中空部にホルダ外より螺合され上記
弾性部材の弾性力を調整する弾性力調整用ねじと
を具備したものである。[Structure of the Invention] (Means for Solving the Problems) That is, the present invention provides an astigmatism lens housed in an astigmatism lens position adjustment guide formed in the pick up head of an optical disc player. In the astigmatism lens position adjustment device for a pick-up head, which adjusts the light reflected from the disk to be focused on a photodiode by sliding the astigmatism lens position adjustment guide as appropriate. a holder disposed outside the holder and having a hollow portion; an astigmatism lens that is slidably housed in the hollow portion of the holder and has an edge-shaped tip and is inserted into a groove formed in the astigmatism lens; a position adjustment pin, an elastic member accommodated in the hollow portion and urging the astigmatism lens position adjustment pin toward the astigmatism lens, and an elastic member screwed into the hollow portion from outside the holder. It is equipped with an elastic force adjustment screw for adjusting the force.
（作用）
つまりASレンズ位置調整用ピンをASレンズの
溝に挿入する際弾性部材により付勢して、ASレ
ンズをASレンズ位置調整用ガイドに圧接した状
態とする。この状態でホルダを操作してASレン
ズをASレンズ位置調整用ガイドに沿つて適宜摺
動させてその位置を調整するものである。それに
よつてASレンズがASレンズ位置調整用ガイドに
対し傾いた状態で調整されることを防止するもの
である。(Function) In other words, when the AS lens position adjustment pin is inserted into the groove of the AS lens, it is biased by the elastic member to bring the AS lens into pressure contact with the AS lens position adjustment guide. In this state, the holder is operated to appropriately slide the AS lens along the AS lens position adjustment guide to adjust its position. This prevents the AS lens from being adjusted in an inclined state with respect to the AS lens position adjustment guide.
（実施例）
以下第１図及び第２図を参照して本発明の一実
施例を説明する。尚従来と同一部分には同一符号
を付して示しその説明は省略する。第１図は本実
施例による非点収差レンズ位置調整用装置の断面
図であり、図中符号１０１はホルダである。尚、
このホルダ１０１は、例えば前記PHU１が載置
されたベースが在り、このベース上に載置された
XYテーブル上に設けられたり、又はオペレータ
により保持されるようになつている。このホルダ
１０１内にはASレンズ位置調整用ピン１０２が
摺動可能に収容されており、このASレンズ位置
調整用ピン１０２の後端部側にはスプリング１０
３を介してスプリング調整ねじ１０４がねじ込ま
れている。上記ASレンズ位置調整用ピン１０２
の先端部は第２図に示すようにエツジ状となつて
おり、本実施例では先端角（図中符号θで示す）
が90度である。また先端部の幅（d1）がレンズ３
の溝７の幅（d2）より大きくなつている。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. It should be noted that the same parts as in the prior art are denoted by the same reference numerals and the explanation thereof will be omitted. FIG. 1 is a sectional view of the astigmatism lens position adjustment device according to this embodiment, and reference numeral 101 in the figure is a holder. still,
This holder 101 has a base on which the PHU 1 is placed, for example, and the PHU 1 is placed on this base.
It is arranged on an XY table or held by an operator. An AS lens position adjustment pin 102 is slidably housed in this holder 101, and a spring 10 is attached to the rear end side of this AS lens position adjustment pin 102.
A spring adjustment screw 104 is screwed in through 3. Above AS lens position adjustment pin 102
As shown in Fig. 2, the tip is edge-shaped, and in this example, the tip angle (indicated by the symbol θ in the figure) is
is 90 degrees. Also, the width of the tip (d 1 ) is the same as that of lens 3.
The width (d 2 ) of the groove 7 is larger than the width (d 2 ) of the groove 7 .
上記構成においてASレンズ３の調整について
説明する。まずホルダ１０１を保持してASレン
ズ位置調整用ピン１０２の先端部をASレンズ３
の溝７内に挿入する。その際先端のエツジ部が溝
７の端部に当接した状態となる。その状態で上記
ホルダ１０１をさらに押込むと、ASレンズ３は
スプリング１０３のスプリング力によつてASレ
ンズ位置調整用ガイド５に押付けられる。この場
合、ASレンズ位置調整用ピン１０２の先端部は
回転せずにスプリング力によつてASレンズをAS
レンズ位置調整用ガイド５に押付ける。これによ
つてASレンズ３のASレンズ位置調整用ガイド５
に対する傾きは確実に規制される。この状態で上
記ホルダ１０１を介してASレンズ３を適宜移動
させて所望の位置に調整する。この調整が終了の
後、ASレンズ位置調整用ピン１０２によりASレ
ンズ３をASレンズ位置調整用ガイド５に対して
押付けた状態で固耐用ねじによりASレンズ３を
固定する。そして、ASレンズ位置調整用ピン１
０２をASレンズ３の溝７から抜去する。尚スプ
リング調整ねじ１０４のねじ込み量を適宜調整す
ることによりASレンズ３を押付ける力を調整す
ることができる。 Adjustment of the AS lens 3 in the above configuration will be explained. First, hold the holder 101 and insert the tip of the AS lens position adjustment pin 102 into the AS lens 3.
Insert it into the groove 7 of. At this time, the edge portion of the tip comes into contact with the end portion of the groove 7. When the holder 101 is further pushed in this state, the AS lens 3 is pressed against the AS lens position adjustment guide 5 by the spring force of the spring 103. In this case, the tip of the AS lens position adjustment pin 102 does not rotate, but uses the spring force to move the AS lens to the AS position.
Press it against the lens position adjustment guide 5. With this, the AS lens position adjustment guide 5 of the AS lens 3
The inclination to is reliably regulated. In this state, the AS lens 3 is appropriately moved via the holder 101 and adjusted to a desired position. After this adjustment is completed, the AS lens 3 is pressed against the AS lens position adjustment guide 5 by the AS lens position adjustment pin 102, and the AS lens 3 is fixed by the fixing screw. And AS lens position adjustment pin 1
02 from the groove 7 of the AS lens 3. Note that the force with which the AS lens 3 is pressed can be adjusted by appropriately adjusting the screwing amount of the spring adjustment screw 104.
以上本発明によると以下のような効果を奏する
ことができる。 According to the present invention, the following effects can be achieved.
まずASレンズ３の調整不良が確実に防止さ
れる。すなわちASレンズ３はスプリング１０
３のスプリング力によりASレンズ位置調整用
ガイド５に押付けられた状態でその位置を調整
されるので、傾いた状態で調整されることはな
く、調整した後固定用ねじにより固定してもそ
の位置が変化しないからである。 First, maladjustment of the AS lens 3 is reliably prevented. In other words, the AS lens 3 has a spring 10
Since the position is adjusted while being pressed against the AS lens position adjustment guide 5 by the spring force in step 3, it will not be adjusted in a tilted state, and even if it is fixed with the fixing screw after adjustment, it will not remain in the same position. This is because it does not change.
次にASレンズ位置調整用ピン１０２の先端
部の幅（d1）は溝７の幅（d2）より大きくかつ
エツジ状となつているので、単に溝７内に挿入
するだけでASレンズ３を確実に保持すること
ができ、従来のような回転動作は不要である。 Next, since the width (d 1 ) of the tip of the AS lens position adjustment pin 102 is larger than the width (d 2 ) of the groove 7 and has an edge shape, the AS lens 3 can be adjusted by simply inserting it into the groove 7. can be held securely, and there is no need for conventional rotational movements.
さらにスプリング１０３によるスプリング力
はスプリング調整用ねじ１０４により適宜調整
することができるのはもとよりである。 Furthermore, it goes without saying that the spring force exerted by the spring 103 can be adjusted as appropriate using the spring adjustment screw 104.
［発明の効果］
以上詳述したように本発明によるピツクアツプ
ヘツド用の非点収差レンズ位置調整装置による
と、いわゆる調整不良を確実になくすことがで
き、調整不良による不良品の発生を効果的に無く
すことができる等その効果は大である。[Effects of the Invention] As detailed above, according to the astigmatism lens position adjustment device for a pick-up head according to the present invention, so-called poor adjustment can be reliably eliminated, and the occurrence of defective products due to poor adjustment can be effectively prevented. The effects are great, such as being able to eliminate them.
第１図及び第２図は本発明の一実施例を示す図
で、第１図は非点収差レンズ位置調整装置の断面
図、第２図は第１図の部を拡大して示す断面
図、第３図乃至第５図は従来例を示す図で、第３
図はピツクアツプヘツドを一部切欠いて示す図、
第４図ａ，ｂ，ｃは位置調整を説明するための
図、第５図は固定ようねじによる固定を示す断面
図である。
１０１……ホルダ、１０２……ASレンズ位置
調整用ピン、１０３……スプリング（弾性部材）、
１０４……スプリング調整用ねじ（弾性力調整ね
じ）。
1 and 2 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a sectional view of an astigmatism lens position adjustment device, and FIG. 2 is an enlarged sectional view of the part shown in FIG. 1. , Fig. 3 to Fig. 5 are diagrams showing conventional examples.
The figure shows the pick up head partially cut away.
FIGS. 4a, b, and c are diagrams for explaining position adjustment, and FIG. 5 is a sectional view showing fixation by fixing screws. 101...Holder, 102...AS lens position adjustment pin, 103...Spring (elastic member),
104...Spring adjustment screw (elastic force adjustment screw).
Claims (1)
ド内に形成された非点収差レンズ位置調整用ガイ
ド内に収容された非点収差レンズを上記非点収差
レンズ位置調整用ガイドに沿つて適宜摺動させる
ことによりデイスクより反射した光がフオトダイ
オードで焦点を結ぶように調整するピツクアツプ
ヘツド用の非点収差レンズ位置調整装置におい
て、上記ピツクアツプヘツドの外に配置され中空
部を備えたホルダと、このホルダの中空部内に摺
動可能に収容され先端がエツジ状に形成され上記
非点収差レンズに形成された溝に挿入される非点
収差レンズ位置調整用ピンと、上記中空部に収容
され上記非点収差レンズ位置調整用ピンを上記非
点収差レンズ方向に付勢する弾性部材と、上記中
空部にホルダ外より螺合され上記弾性部材の弾性
力を調整する弾性力調整用ねじとを具備したこと
を特徴とするピツクアツプヘツド用の非点収差レ
ンズ位置調整装置。 ２ 上記非点収差レンズ位置調整用ピンはその先
端部の幅が非点収差レンズの溝の幅より大きく形
成された特許請求の範囲第１項記載のピツクアツ
プヘツド用の非点収差レンズ位置調整装置。[Scope of Claims] 1. An astigmatism lens housed in an astigmatism lens position adjustment guide formed in a pick up head of an optical disc player is suitably moved along the astigmatism lens position adjustment guide. An astigmatism lens position adjustment device for a pick-up head that adjusts the position of an astigmatism lens for a pick-up head by sliding it so that the light reflected from the disk is focused on a photodiode, the holder being disposed outside the pick-up head and having a hollow part; An astigmatism lens position adjustment pin is slidably housed in the hollow part of the holder and has an edge-shaped tip and is inserted into a groove formed in the astigmatism lens. An elastic member for urging the point aberration lens position adjustment pin in the direction of the astigmatism lens, and an elastic force adjustment screw that is screwed into the hollow portion from outside the holder and adjusts the elastic force of the elastic member. An astigmatism lens position adjustment device for a pick-up head, characterized by the following. 2. The astigmatism lens position adjustment device for a pick-up head according to claim 1, wherein the astigmatism lens position adjustment pin has a width at its tip larger than the width of the groove of the astigmatism lens. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26825286A JPS63121809A (en) | 1986-11-11 | 1986-11-11 | Device for adjusting position of astigmatic lens for pickup head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26825286A JPS63121809A (en) | 1986-11-11 | 1986-11-11 | Device for adjusting position of astigmatic lens for pickup head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63121809A JPS63121809A (en) | 1988-05-25 |
| JPH048763B2 true JPH048763B2 (en) | 1992-02-18 |
Family
ID=17455995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26825286A Granted JPS63121809A (en) | 1986-11-11 | 1986-11-11 | Device for adjusting position of astigmatic lens for pickup head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63121809A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872052B (en) * | 2009-04-24 | 2014-04-23 | 鸿富锦精密工业（深圳）有限公司 | Assembled fixture |
-
1986
- 1986-11-11 JP JP26825286A patent/JPS63121809A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63121809A (en) | 1988-05-25 |
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