JPH0535845B2 - - Google Patents
Info
- Publication number
- JPH0535845B2 JPH0535845B2 JP21233085A JP21233085A JPH0535845B2 JP H0535845 B2 JPH0535845 B2 JP H0535845B2 JP 21233085 A JP21233085 A JP 21233085A JP 21233085 A JP21233085 A JP 21233085A JP H0535845 B2 JPH0535845 B2 JP H0535845B2
- Authority
- JP
- Japan
- Prior art keywords
- prism
- lens barrel
- bonding agent
- luminous flux
- fixing structure
- 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 - Lifetime
Links
- 239000007767 bonding agent Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、半導体レーザ光源からの光束を指定
方向に変化させるプリズムを鏡筒に固定する構造
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a structure in which a prism that changes a luminous flux from a semiconductor laser light source in a specified direction is fixed to a lens barrel.
特開昭57−202507号および特開昭58−70207号
を利用した従来の光源を内蔵する鏡筒の一例を第
６図、第７図に示す。鏡筒１（アルミ材）と保持
されるプリズム２（光学部品）を、鏡筒１の基準
面３と保持されるプリズム２の光束入射面４を接
合していた為、接合剤５の収縮、鏡筒１の伸縮に
より保持されるプリズム２の取り付け角度６が変
化し光束７が変動する欠点があつた。この取り付
け角度６の変動現象状態を拡大して第８図に示
す。
An example of a lens barrel incorporating a conventional light source using Japanese Patent Application Laid-open Nos. 57-202507 and 58-70207 is shown in FIGS. 6 and 7. Since the lens barrel 1 (aluminum material) and the held prism 2 (optical component) were bonded to the reference surface 3 of the lens barrel 1 and the light beam incidence surface 4 of the held prism 2, shrinkage of the bonding agent 5, There is a drawback that the mounting angle 6 of the prism 2 held changes as the lens barrel 1 expands and contracts, causing the luminous flux 7 to fluctuate. FIG. 8 shows an enlarged view of the state of variation in the mounting angle 6.
第８図ｂを常温とすると接合剤５の収縮、鏡筒
１の温度変化の伸縮により第８図ａ，ｃの様に光
束７が変動する現象が生じることになる。 If the temperature shown in FIG. 8b is set to room temperature, the phenomenon in which the luminous flux 7 fluctuates as shown in FIGS. 8a and 8c will occur due to contraction of the bonding agent 5 and expansion and contraction of the lens barrel 1 due to temperature changes.
本発明の目的は、温度変化による光束の変動を
小さくしたプリズムの鏡筒への固定構造を提供す
ることである。
An object of the present invention is to provide a structure for fixing a prism to a lens barrel, which reduces fluctuations in luminous flux due to temperature changes.
本発明の特徴とするところは、鏡筒とプリズム
突き合せ面となる基準面に垂直な側壁面の中央部
中立軸上で両者を同一スミ肉形状で接合剤により
接着し、バネ材によりプリズムの基準面を鏡筒の
基準面に押し付けるように固定するところにあ
る。これによりプリズムと鏡筒の位置ズレを光束
と同一方向のみとすることができ、光束の温度変
化による変動を最少限にすることができる。
The features of the present invention are that the lens barrel and the prism are bonded together with a bonding agent in the same fillet shape on the central neutral axis of the side wall surface perpendicular to the reference plane which is the abutting surface of the prism, and the prism is attached using a spring material. This is where the reference surface is fixed so as to be pressed against the reference surface of the lens barrel. Thereby, the positional deviation between the prism and the lens barrel can be made only in the same direction as the light beam, and fluctuations in the light beam due to temperature changes can be minimized.
以下、本発明の一実施例を第１図〜第３図を用
いて説明する。光デイスク装置の光ヘツドの光源
であるレーザーモジユール貼合わせプリズムに実
施した固定構造を第１図に示す。この図はアルミ
材である鏡筒１と支持される光学部品２（プリズ
ム等のガラス材）を互いの基準面３に対し垂直な
側壁面の中央部である中立軸上１０（以下「側壁
面中央部中立軸上」と呼ぶ）で、接合剤９で対称
点２ケ所を接合し、鏡筒１と支持されるプリズム
２が互いに基準面３に常に押し付け合うように線
対称形のバネ８をネジ１１で鏡筒１に取付ける。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 shows a fixing structure implemented on a laser module laminated prism, which is the light source of the optical head of an optical disk device. This figure shows a lens barrel 1 made of aluminum and a supported optical component 2 (glass material such as a prism) placed on a neutral axis 10 (hereinafter referred to as "side wall surface At the central neutral axis (referred to as "on the central neutral axis"), the two symmetrical points are joined with a bonding agent 9, and a linearly symmetrical spring 8 is attached so that the lens barrel 1 and the supported prism 2 are always pressed against each other against the reference surface 3. Attach to lens barrel 1 with screws 11.
本実施例によれば、プリズム２の側壁面中央部
中立軸上１０を光束７と平行に鏡筒１にＣ矢視拡
大図に示したように同一スミ肉形状で接合剤にて
接合する事により接合剤の硬化時に生じる収縮力
が光束７と平行に生じるため、接合剤硬化収縮力
によりプリズム２に曲げモーメント等のストレス
を与えない。第２図に、鏡筒１が収縮する際、プ
リズム２の接合点を固定点として回転モーメント
Ｍが働く方向を示す。この様に回転モーメントが
働いても第３図およびＢ矢視拡大図に示したよう
にバネ８によりプリズム２と鏡筒１は常に基準面
３に押し付けられ接しているため温度変化により
光束７を変動させない働きがある。すなわちバネ
８の作用により曲げモーメント力をバランスさせ
基準面３に平行方向の変動のみにすることがき
る。実験結果を第４図、第５図に示すが、これら
の図は加熱冷却サイクルを横軸に、縦軸に光束の
ズレ量をとつたものである。第４図が従来構造の
もの、第５図が本実施例によるものである。２つ
のグラフの最大変動量l1，l2を比較すると、本実
施例のものは従来のものの40％以下である。 According to this embodiment, the central part of the side wall surface of the prism 2 on the neutral axis 10 is bonded to the lens barrel 1 in parallel with the light beam 7 using a bonding agent in the same fillet shape as shown in the enlarged view of arrow C. Since the shrinkage force generated when the bonding agent hardens is generated in parallel to the light beam 7, stress such as a bending moment is not applied to the prism 2 due to the bonding agent curing shrinkage force. FIG. 2 shows the direction in which the rotational moment M acts when the lens barrel 1 contracts, with the junction of the prism 2 as a fixed point. Even when a rotational moment acts like this, the spring 8 keeps the prism 2 and lens barrel 1 pressed against the reference surface 3 as shown in FIG. 3 and the enlarged view of arrow B. It has the function of preventing fluctuations. That is, by the action of the spring 8, the bending moment force can be balanced and only fluctuated in the direction parallel to the reference plane 3. The experimental results are shown in FIGS. 4 and 5, in which the horizontal axis represents the heating/cooling cycle and the vertical axis represents the deviation amount of the luminous flux. FIG. 4 shows a conventional structure, and FIG. 5 shows a structure according to this embodiment. Comparing the maximum fluctuation amounts l 1 and l 2 of the two graphs, the one in this example is less than 40% of the conventional one.
本発明によれば、温度変化による光学部品の変
動を少なくできるので、光源からの光束を指定さ
れた角度に高精度出射できる効果がある。これに
より半導体レーザの高出力パワーを利用した光デ
イスク装置等の性能の安定化を図ることができ
る。
According to the present invention, it is possible to reduce fluctuations in optical components due to temperature changes, so there is an effect that the luminous flux from the light source can be emitted at a specified angle with high precision. This makes it possible to stabilize the performance of optical disk devices and the like that utilize the high output power of semiconductor lasers.
第１図は、本発明の一実施例によるプリズムの
固定構造を示す図、第２図は、プリズムの変動方
向を示す図、第３図は本発明の一実施例における
バネ材の働きを示す図、第４図は、従来例におけ
る加熱冷却サイクルと光束ズレ量の関係を示す
図、第５図は、本発明の一実施例における加熱サ
イクルと光束ズレ量の関係を示す図、第６図、第
７図は従来のプリズムの固定構造を示す図、第８
図は、プリズムの熱変動現象を説明するための図
である。
１……鏡筒、２……光学部品（プリズム）、３
……基準面、８……バネ、７……光束、９……接
合剤、１０……側壁面中央部中立軸。
Fig. 1 is a diagram showing a prism fixing structure according to an embodiment of the present invention, Fig. 2 is a diagram showing a prism movement direction, and Fig. 3 is a diagram showing the function of a spring member in an embodiment of the present invention. 4 is a diagram showing the relationship between the heating/cooling cycle and the amount of luminous flux deviation in a conventional example, FIG. 5 is a diagram showing the relationship between the heating cycle and the amount of luminous flux deviation in an embodiment of the present invention, and FIG. , Figure 7 is a diagram showing the conventional prism fixing structure, Figure 8 is a diagram showing a conventional prism fixing structure.
The figure is a diagram for explaining a thermal fluctuation phenomenon of a prism. 1... Lens barrel, 2... Optical component (prism), 3
... Reference surface, 8 ... Spring, 7 ... Luminous flux, 9 ... Bonding agent, 10 ... Neutral axis at the center of the side wall surface.
Claims (1)
おいて、鏡筒とプリズムの突き合せ面となる基準
面に垂直な側壁面の中央部中立軸上で同一スミ肉
形状で両者を接合剤により接着し、バネ材により
前記プリズムの基準面を鏡筒の基準面に押しつけ
るように固定することを特徴とするプリズムの固
定構造。1. In the fixing structure of the lens barrel and prism, which are optical components, the two are bonded with a bonding agent in the same fillet shape on the central neutral axis of the side wall surface perpendicular to the reference plane, which is the abutting surface of the lens barrel and prism. . A prism fixing structure, characterized in that a spring material fixes a reference surface of the prism so as to press it against a reference surface of a lens barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21233085A JPS6273219A (en) | 1985-09-27 | 1985-09-27 | Prism fixed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21233085A JPS6273219A (en) | 1985-09-27 | 1985-09-27 | Prism fixed structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6273219A JPS6273219A (en) | 1987-04-03 |
| JPH0535845B2 true JPH0535845B2 (en) | 1993-05-27 |
Family
ID=16620750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21233085A Granted JPS6273219A (en) | 1985-09-27 | 1985-09-27 | Prism fixed structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6273219A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2526351Y2 (en) * | 1991-10-25 | 1997-02-19 | 株式会社貝印刃物開発センター | Multipurpose scissors |
-
1985
- 1985-09-27 JP JP21233085A patent/JPS6273219A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6273219A (en) | 1987-04-03 |
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