JPH0224091Y2 - - Google Patents
Info
- Publication number
- JPH0224091Y2 JPH0224091Y2 JP13888984U JP13888984U JPH0224091Y2 JP H0224091 Y2 JPH0224091 Y2 JP H0224091Y2 JP 13888984 U JP13888984 U JP 13888984U JP 13888984 U JP13888984 U JP 13888984U JP H0224091 Y2 JPH0224091 Y2 JP H0224091Y2
- Authority
- JP
- Japan
- Prior art keywords
- mirror holder
- mirror
- screw
- stepped base
- stepped
- 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
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は光デイスクの光学ヘツドに用いる光学
ヘツド用ミラーのミラーホルダに関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mirror holder for an optical head mirror used in an optical head of an optical disk.
［従来の技術］
光学ヘツドは第４図に示されている。同図にお
いて、１は半導体レーザー、２はコリメータレン
ズ、３はシリンドリカル凹レンズ、４はシリンド
リカル凸レンズ、５は偏光ビームスプリツタ、６
はミラー、７は1/4波長板、８は集光レンズアク
チユエータ、９はデイスク、１０はミラー、１１
は凸レンズ、１２はシリンドリカル凸レンズ、１
３は４分割光検知器である。[Prior Art] An optical head is shown in FIG. In the figure, 1 is a semiconductor laser, 2 is a collimator lens, 3 is a cylindrical concave lens, 4 is a cylindrical convex lens, 5 is a polarizing beam splitter, and 6 is a polarizing beam splitter.
is a mirror, 7 is a quarter-wave plate, 8 is a condensing lens actuator, 9 is a disk, 10 is a mirror, 11
is a convex lens, 12 is a cylindrical convex lens, 1
3 is a four-part photodetector.
従つて、半導体レーザー１から出た光はコリメ
ータンス２で平行な光となつたのち、シリンドリ
カル凹レンズ３及びシリンドリカル凸レンズ４で
円形断面のビームになり、その後、集光レンズア
クチユレータ８を通つてデイスク９上で直径1μ
ｍφ程度に集光する。デイスク９で反射した戻り
光は波長板７により偏光方向を変えられたのち、
偏光ビームスプリツタ５で光路を直角に曲げら
れ、その後、さらにミラー１０で光路を曲げら
れ、光検知器１３に入射する。 Therefore, the light emitted from the semiconductor laser 1 becomes parallel light by the collimator 2, becomes a beam with a circular cross section by the cylindrical concave lens 3 and the cylindrical convex lens 4, and then passes through the condenser lens actuator 8. 1μ diameter on disk 9
The light is focused to about mφ. After the return light reflected by the disk 9 has its polarization direction changed by the wavelength plate 7,
The optical path is bent at a right angle by the polarizing beam splitter 5, and then the optical path is further bent by the mirror 10, and the beam enters the photodetector 13.
従来のミラーホルダ１４は第５図〜第９図に示
すように段付台１５と、この段付台１５に立設
し、ミラー１０を貼付ける貼付台１６とからでき
ている。段付台１５は前部１５ａと後部１５ｂと
からなり、前部１５ａと後部１５ｂとは段付きに
なつている。ミラーホルダ１４は段付台１５の後
部１５ｂが架台１７に螺着されているが、段付台
１５の前部１５ａは架台１７と一定間隔を有して
いる。段付台１５の前部１５ａの先端部には穴１
８が設けられ、穴１８にはネジ１９が貫通し、ネ
ジ１９は架台１７と螺合している。従つてネジ１
９を締め付けると、ミラーホルダ１４の段付台１
５が下方にたわむようになる。段付台１５の前部
１５ａの後端部にはネジ２０が螺合し、ネジ２０
の先端部は架台１７と当接している。従つて、ネ
ジ２０をしめつけると、ミラーホルダ１４の段付
台１５があおられ、上方にたわむようになる。 As shown in FIGS. 5 to 9, the conventional mirror holder 14 is made up of a stepped base 15 and an attachment base 16 that stands on the stepped base 15 and on which the mirror 10 is attached. The stepped base 15 consists of a front part 15a and a rear part 15b, and the front part 15a and the rear part 15b are stepped. In the mirror holder 14, the rear part 15b of the stepped base 15 is screwed onto the pedestal 17, but the front part 15a of the stepped pedestal 15 is spaced apart from the pedestal 17 by a constant distance. A hole 1 is provided at the tip of the front part 15a of the stepped base 15.
8, a screw 19 passes through the hole 18, and the screw 19 is screwed into the frame 17. Therefore screw 1
When 9 is tightened, the stepped base 1 of the mirror holder 14
5 will now bend downward. A screw 20 is screwed into the rear end of the front portion 15a of the stepped base 15.
The distal end portion of is in contact with the pedestal 17. Therefore, when the screw 20 is tightened, the stepped base 15 of the mirror holder 14 is opened and becomes bent upward.
そのため、ミラーホルダ１４の段付台１５は第
９図に示すように、ネジ１９による矢印Ａの力が
働くと共に、ネジ２０による矢印Ｂの力が働くた
め、常に段付台１５を変形させる矢印Ｃの力が加
わり、上向凸の弓形に変形するようになる。 Therefore, as shown in FIG. 9, the stepped base 15 of the mirror holder 14 is subjected to the force of arrow A caused by the screw 19 and the force of arrow B caused by the screw 20, so that the stepped base 15 is constantly deformed. Force C is applied, and it begins to deform into an upwardly convex arcuate shape.
［考案が解決しようとする問題点］
従来のミラーホルダは段付台１５が弓形に変形
するため、長時間使用すると、クリープ破壊が生
じて、光軸がずれる問題点を有していた。[Problems to be Solved by the Invention] In the conventional mirror holder, the stepped base 15 deforms into an arcuate shape, so when used for a long time, creep failure occurs and the optical axis shifts.
本考案は前記のような従来のもののもつ問題点
を解決して、長時間使用しても、クリープ破壊を
生じさせない光学ヘツド用ミラーのミラーホルダ
を提供することを目的とするものである。 SUMMARY OF THE INVENTION An object of the present invention is to provide a mirror holder for an optical head mirror that does not cause creep failure even after long-term use, by solving the problems of the conventional mirrors as described above.
［問題点を解決するための手段］
本考案は、光路を曲げるミラーを貼付けるミラ
ーホルダに、該ミラーホルダを下方にたわませる
機構Ａと、該ミラーホルダをあおつて上方にたわ
ませる機構Ｂとを設けた光学ヘツド用ミラーのミ
ラーホルダにおいて、前記ミラーホルダの前記機
構Ａと前記機構Ｂとの間に、前記ミラーホルダの
変形させる力を打消す機構Ｃを設けたことを特徴
とする光学ヘツド用ミラーのミラーホルダであ
る。[Means for Solving the Problems] The present invention provides a mirror holder to which a mirror that bends an optical path is attached, a mechanism A for bending the mirror holder downward, and a mechanism A for bending the mirror holder upward by agitating the mirror holder. B, the mirror holder for an optical head mirror is characterized in that a mechanism C is provided between the mechanism A and the mechanism B of the mirror holder to cancel the deforming force of the mirror holder. This is a mirror holder for an optical head mirror.
［作用］
この考案においては上記機構Ａと機構Ｂとの間
に設けた機構Ｃによつて、機構Ａと機構Ｂとによ
つて生ずるミラーホルダを変形させる力を打消し
ている。[Operation] In this invention, the mechanism C provided between the mechanisms A and B cancels out the force that is generated by the mechanisms A and B to deform the mirror holder.
［実施例］
以下、本考案の実施例を図面に基づいて説明す
る。第１図〜第３図は本考案の実施例を示してお
り、段付台１５の前部１５ａの先端部の穴１８に
貫通したネジ１９と、段付台１５の前部１５ａの
後端部に螺合したネジ２０との間には穴２１が設
けられ、穴２１にはネジ２２が貫通し、ネジ２２
は架台１７と螺合している。従つてネジ２２を軽
く締めると、第３図に示すように矢印Ｄの力が働
き、段付台１５の上向凸の弓形に変形しようとす
る力が打消されることになる。その他の符号で第
５図〜第９図の符号と同符号のものは第５図〜第
９図の符号のものと同一又は相当部分を示してい
るので、説明を省略する。[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1 to 3 show an embodiment of the present invention, and show a screw 19 passing through a hole 18 at the tip of the front part 15a of the stepped base 15, and a rear end of the front part 15a of the stepped base 15. A hole 21 is provided between the screw 20 screwed into the hole 21, a screw 22 passes through the hole 21, and the screw 22 is inserted into the hole 21.
is screwed together with the pedestal 17. Therefore, when the screw 22 is lightly tightened, the force of arrow D acts as shown in FIG. 3, and the force that tends to deform the stepped base 15 into an upwardly convex arcuate shape is canceled out. Other reference numerals that are the same as those in FIGS. 5 to 9 indicate the same or equivalent parts as those in FIGS. 5 to 9, and therefore their explanations will be omitted.
なお、前記実施例に限定させることなく、ネジ
１９、ネジ２０及びネジ２２の代わりに、本考案
の精神を逸脱しない範囲であるならばいかなる機
構でもよく、例えばスプリング等であつてもよ
い。 Note that, without being limited to the above-described embodiment, any mechanism may be used instead of the screws 19, 20, and 22 as long as it does not depart from the spirit of the present invention, such as a spring.
［考案の効果］
本考案は前記のようにミラーホルダの機構Ａと
機構Ｂとの間に、ミラーホルダの変形させる力を
打消す機構Ｃを設けているので、ミラーホルダを
長時間使用しても、クリープ破壊が生ぜず、光軸
がずれなくなる等の効果を有している。[Effects of the invention] As described above, the present invention is provided with a mechanism C between the mechanisms A and B of the mirror holder to cancel out the force that deforms the mirror holder, so that the mirror holder can be used for a long time. Also, creep failure does not occur and the optical axis does not shift.
第１図〜第３図は本考案の実施例を示してお
り、第１図は平面図、第２図は段付台を架台に取
付けた立面図、第３図は段付台の変形状態を示す
説明図である。第４図は光学ヘツドの光路図であ
る。第５図〜第９図は従来のミラーホルダを示し
ており、第５図は斜視図、第６図は平面図、第７
図は立面図、第８図は段付台を架台に取付けた立
面図、第９図は段付台の変形状態を示す説明図で
ある。
１０……ミラー、１４……ミラーホルダ、１５
……段付台、１７……架台、１９……ネジ（機構
Ａ）、２０……ネジ（機構Ｂ）、２２……ネジ（機
構Ｃ）、図中、同一符号は同一又は相当部分を示
す。
Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a plan view, Figure 2 is an elevational view of the stepped base attached to the pedestal, and Figure 3 is a modification of the stepped base. It is an explanatory diagram showing a state. FIG. 4 is an optical path diagram of the optical head. Figures 5 to 9 show conventional mirror holders, with Figure 5 being a perspective view, Figure 6 being a plan view, and Figure 7 being a top view.
The figure is an elevational view, FIG. 8 is an elevational view of the stepped base attached to the pedestal, and FIG. 9 is an explanatory diagram showing the deformed state of the stepped base. 10...Mirror, 14...Mirror holder, 15
...Stepped stand, 17... Frame, 19... Screw (mechanism A), 20... Screw (mechanism B), 22... Screw (mechanism C), In the drawings, the same reference numerals indicate the same or equivalent parts. .
Claims (1)
に、該ミラーホルダを下方にたわませる機構Ａ
と、該ミラーホルダをあおつて上方にたわませる
機構Ｂとを設けた光学ヘツド用ミラーのミラーホ
ルダにおいて、前記ミラーホルダの前記機構Ａと
前記機構Ｂとの間に、前記ミラーホルダの変形さ
せる力を打消す機構Ｃを設けたことを特徴とする
光学ヘツド用ミラーホルダ。 Mechanism A for bending the mirror holder downward on the mirror holder to which the mirror that bends the optical path is attached
and a mechanism B for bending the mirror holder upward by agitating the mirror holder. A mirror holder for an optical head, characterized in that it is provided with a mechanism C for canceling force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13888984U JPH0224091Y2 (en) | 1984-09-13 | 1984-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13888984U JPH0224091Y2 (en) | 1984-09-13 | 1984-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6153719U JPS6153719U (en) | 1986-04-11 |
| JPH0224091Y2 true JPH0224091Y2 (en) | 1990-07-02 |
Family
ID=30697280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13888984U Expired JPH0224091Y2 (en) | 1984-09-13 | 1984-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224091Y2 (en) |
-
1984
- 1984-09-13 JP JP13888984U patent/JPH0224091Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6153719U (en) | 1986-04-11 |
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