JPS61264311A - Optical signal reproducing device - Google Patents
Optical signal reproducing deviceInfo
- Publication number
- JPS61264311A JPS61264311A JP60105822A JP10582285A JPS61264311A JP S61264311 A JPS61264311 A JP S61264311A JP 60105822 A JP60105822 A JP 60105822A JP 10582285 A JP10582285 A JP 10582285A JP S61264311 A JPS61264311 A JP S61264311A
- Authority
- JP
- Japan
- Prior art keywords
- half mirror
- mirror
- leaf spring
- case
- optical signal
- 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.)
- Pending
Links
Landscapes
- Optical Head (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はコンパクトディスク（ＣＤ）プレーヤ等におい
てハーフミラ−（平行平板）による非点収差を利用した
光学式信号再生装置に係り、特にハーフミラ−の最適な
固定方法に関するものである。Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to an optical signal reproducing device that utilizes astigmatism caused by a half mirror (parallel plate) in a compact disc (CD) player, etc. This relates to a fixing method.
この種の光学式信号再生装置において、前記ハーフミラ
−を前記ケースに組み込んだ後の、前記ハーフミラ−の
許容変動量は光軸に対して、０．００１°以内であり、
さらに、前記ノ・−７ミラーの収差もＲＭＳ値でλ／４
０以下、Ｐ−Ｐ値でλ／１０（λ＝７８０ｍｇ）でなけ
ればならない０従って、前記ハーフミラ−を接着剤等で
固定した場合、温度変化等の環境変化による接着剤の変
形が直接前記ハーフミラ−におよぼさないようにしなけ
ればならない。In this type of optical signal reproducing device, after the half mirror is assembled into the case, the permissible variation amount of the half mirror is within 0.001° with respect to the optical axis;
Furthermore, the aberration of the No.-7 mirror is also λ/4 in RMS value.
0 or less, P-P value must be λ/10 (λ = 780 mg) 0 Therefore, when the half mirror is fixed with an adhesive, deformation of the adhesive due to environmental changes such as temperature changes will directly affect the half mirror. − must be avoided.
なお、この種の装置として関連するものには、例えば、
特開昭５９−１６７Ｂ６５号等が挙げられる０
〔発明の目的〕
本発明の目的は、前述した仕様を満ｉする極めて信頼性
の高い光学式信号再生装置を提供することにある。Note that related devices of this type include, for example,
JP-A No. 59-167B65, etc. 0 [Object of the Invention] An object of the present invention is to provide an extremely reliable optical signal reproducing device that satisfies the above-mentioned specifications.
本発明は、前記ハーフミラ−を前記ケースに前記板バネ
と前記接着剤により固定する際の前記接着剤の塗布箇所
に関するものであり、前記接着剤を、例えば前記ケース
と前記板バネの間および、前記板バネと前記ハーフミラ
−との間に塗布すれば、温度変化等の環境変化により、
ハーフミラ−の光軸に対する傾斜角の変動、およびハー
フミラ−の収差劣化が起こらない。The present invention relates to a location where the adhesive is applied when the half mirror is fixed to the case using the leaf spring and the adhesive, and the adhesive is applied between the case and the leaf spring, for example, and If it is applied between the leaf spring and the half mirror, it will be prevented by environmental changes such as temperature changes.
Fluctuations in the inclination angle of the half mirror with respect to the optical axis and aberration deterioration of the half mirror do not occur.
以下、本発明の実施例を図を用いて詳細に説明する。図
に本実施例の正面図である。Embodiments of the present invention will be described in detail below with reference to the drawings. The figure is a front view of this embodiment.
平行平板状のハーフミラ−１は、光軸Ｘ、 Ｙに対して
４５度傾斜してケース３の面に、板バネ２を介して取り
付けられている。さらに固定補強用の部材として、シリ
コン系の接着剤４ａ〜４ｄが前記ハーフミラ−１と前記
板バネ２の間に、前記板バネ２と前記ケース乙の間に塗
布されている。A parallel flat plate-shaped half mirror 1 is attached to the surface of a case 3 via a leaf spring 2 at an angle of 45 degrees with respect to the optical axes X and Y. Furthermore, silicon adhesives 4a to 4d are applied as fixing and reinforcing members between the half mirror 1 and the plate spring 2, and between the plate spring 2 and the case B.
前記ハーフミラ−１の固定後の許容変動量は光軸Ｘ、Ｙ
に対して０．００１°以内であり、厳しい精度が要求さ
れている。従って、前記ハーフミラ−１と前記ケース５
との間に接着剤４が介入した場合、温度変化による収縮
、膨張により、前記ハーフミラ−１の位置が、光ｓｘ、
ｙに対して変動したり、前記ハーフミラ−１に応力歪゛
みが生じ収差が劣化し、信号再生が不可能になる。そこ
で、前記接着剤４の塗布箇所を、不実施例のようにすれ
ば、前記接着剤の温度変化による影響を直接受けないた
め、信頼性の高い光学式信号再生装置を得ることが可能
になる。The permissible amount of variation after fixing the half mirror 1 is the optical axis X, Y.
This is within 0.001°, which requires strict accuracy. Therefore, the half mirror 1 and the case 5
When the adhesive 4 intervenes between the light sx, the position of the half mirror 1 due to contraction and expansion due to temperature changes,
y, stress distortion occurs in the half mirror 1, aberrations deteriorate, and signal reproduction becomes impossible. Therefore, if the adhesive 4 is applied at a location similar to that in the non-embodiment, it will not be directly affected by temperature changes in the adhesive, making it possible to obtain a highly reliable optical signal reproducing device. .
本発明によれば、前記ハーフミラ−は前記接着剤の環境
変化による収縮および膨張の影響を直接受けないため、
光軸に対する位置ずれ、および歪みによる収差劣化が発
生しない。従って極めて信頼性の高い光学式信号再生装
置を得ることが出来る。According to the present invention, since the half mirror is not directly affected by contraction and expansion of the adhesive due to environmental changes,
Aberration deterioration due to positional deviation with respect to the optical axis and distortion does not occur. Therefore, an extremely reliable optical signal reproducing device can be obtained.
図は本発明の実施例の正面図である。 １・・・ハーフミラ− ４ａ・・・４ｄ・・・接着剤 The figure is a front view of an embodiment of the invention. 1...Half mirror 4a...4d...adhesive
Claims (1)
再生装置において、前記ハーフミラーの反射面側を、前
記ハーフミラーを保持するケースの基準面に押しあてて
前記ハーフミラーの位置出しをし、かつ、前記反射面以
外の箇所で、前記ハーフミラーを接着固定することを特
徴とする光学式信号再生装置。 ２、特許請求の範囲第１項記載の光学式信号再生装置に
おいて、前記ハーフミラーを前記ケースに取付けるため
の板バネを備え、前記接着剤を前記ハーフミラーと前記
板バネの間及び前記板バネと前記ケースとの間に塗布し
て前記ハーフミラーを前記ケースに固定することを特徴
とする光学式信号再生装置。 ３、特許請求の範囲第１項または第２項記載の光学式信
号再生装置において、前記接着剤がリシコン系であるこ
とを特徴とする光学式信号再生装置。[Claims] 1. In an optical signal reproducing device that utilizes astigmatism caused by a half mirror, the reflective surface side of the half mirror is pressed against a reference surface of a case that holds the half mirror. An optical signal reproducing device characterized in that the half mirror is positioned with adhesive and fixed at a location other than the reflecting surface. 2. The optical signal reproducing device according to claim 1, further comprising a plate spring for attaching the half mirror to the case, and applying the adhesive between the half mirror and the plate spring and between the plate spring. and the case to fix the half mirror to the case. 3. The optical signal reproducing device according to claim 1 or 2, wherein the adhesive is a lysicone adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60105822A JPS61264311A (en) | 1985-05-20 | 1985-05-20 | Optical signal reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60105822A JPS61264311A (en) | 1985-05-20 | 1985-05-20 | Optical signal reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61264311A true JPS61264311A (en) | 1986-11-22 |
Family
ID=14417755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60105822A Pending JPS61264311A (en) | 1985-05-20 | 1985-05-20 | Optical signal reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61264311A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6387637U (en) * | 1986-11-28 | 1988-06-08 | ||
| JPH0220819U (en) * | 1988-07-27 | 1990-02-13 |
-
1985
- 1985-05-20 JP JP60105822A patent/JPS61264311A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6387637U (en) * | 1986-11-28 | 1988-06-08 | ||
| JPH0220819U (en) * | 1988-07-27 | 1990-02-13 | ||
| JPH064412Y2 (en) * | 1988-07-27 | 1994-02-02 | パイオニア株式会社 | Optical pickup device |
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