JPS6381670A - Optical disk medium - Google Patents
Optical disk mediumInfo
- Publication number
- JPS6381670A JPS6381670A JP61226773A JP22677386A JPS6381670A JP S6381670 A JPS6381670 A JP S6381670A JP 61226773 A JP61226773 A JP 61226773A JP 22677386 A JP22677386 A JP 22677386A JP S6381670 A JPS6381670 A JP S6381670A
- Authority
- JP
- Japan
- Prior art keywords
- optical disc
- optical disk
- positioning member
- birefringence
- substrate
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 57
- 239000000758 substrate Substances 0.000 abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ディスク媒体に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to optical disc media.
本発明は、中心部に係合位置決め部材を有する光ディス
ク媒体において、係合位置決め部材と光ディスク基盤と
の固定を光ディスク基盤の中心穴部でおこなつｔことに
より、光ディスク媒体の複屈折を小はくシ、光ディスク
装置の信頼性を向上させたものである。The present invention reduces birefringence of the optical disc medium by fixing the engaging positioning member and the optical disc base at the center hole of the optical disc base in an optical disc medium having an engaging positioning member at the center. This improves the reliability of the optical disc device.
従来の光ディスク媒体は、第２図に示すごとく、係合位
置決め部材１２を光ディスク基盤１１に固定する際、光
ディスク基盤１１と係合位置決め部材１２との接触部全
面を接着剤１３で固定している。その霞め、係合位置決
め部材の外周までの広い範囲で固定されている。In the conventional optical disc medium, as shown in FIG. 2, when fixing the engagement positioning member 12 to the optical disc base 11, the entire surface of the contact area between the optical disc base 11 and the engagement positioning member 12 is fixed with an adhesive 13. . The haze is fixed in a wide range up to the outer periphery of the engagement positioning member.
しかし従来技術でば、光ディスク基盤と係合位置決め部
材との固定部に、接着剤の収縮により残留応力が発生す
る。また光ディスク基盤と係合位置決め部材との熱膨張
係数に差がある霞め、温度変化により熱応力が発生する
。これらの応力の九め、元ディスク基盤ｖｃハ複屈折が
生じる。この定め再生信号の劣化が生じ、記録ζｎ、た
データの読み出しが困難になる。複屈折が６０ｎｍ以上
になるとデータの読み出しに出来なくなる。このため係
合位置決め部材をつけることにより、光ディスクの信頼
性が悪化するという問題点を有する。However, in the conventional technology, residual stress is generated in the fixed portion between the optical disc base and the engagement positioning member due to shrinkage of the adhesive. Further, thermal stress is generated due to haze and temperature changes due to differences in thermal expansion coefficients between the optical disk base and the engagement positioning member. As a result of these stresses, birefringence occurs in the original disk substrate. This deterioration of the reproduction signal occurs, making it difficult to read the recorded data. If the birefringence exceeds 60 nm, data cannot be read out. For this reason, there is a problem in that the reliability of the optical disc deteriorates due to the provision of the engagement positioning member.
そこで本発明はこのような問題点を解決するｔめのもの
で、その目的とするところは、光ディスク基盤に生じる
応力を小ツ＜シ、光ディスク基盤の複屈折を少なくして
、信頼性の高い光ディスク媒体を提供するところにある
。Therefore, the present invention is the first to solve these problems, and its purpose is to reduce the stress generated in the optical disk substrate, reduce the birefringence of the optical disk substrate, and improve reliability. The company provides optical disc media.
本発明の光ディスク媒体に、中心部に係合位置決め部材
を有する光ディスク媒体において、係合位置決め部材と
光ディスク基盤との固定を光ディスク基盤の中心穴部で
おこなつたことを特徴とするＯ
〔作用〕
本発明の上記の構成によれば、係合位置決め部材と光デ
ィスク基盤との固定に光ディスク基盤の中心穴部でのみ
おこなわれている定め、光ディスク基盤に発生でる応力
は小ζく、複屈折も小さい。The optical disc medium of the present invention has an engagement positioning member in the center thereof, and is characterized in that the engagement positioning member and the optical disc base are fixed at the center hole of the optical disc base. According to the above configuration of the present invention, the engagement positioning member and the optical disc base are fixed only in the center hole of the optical disc base, and the stress generated in the optical disc base is small and the birefringence is also small. .
以下本発明について図面に基づいて詳細に説明する〇
第１図に本発明の一実施例の断面図であり、１は光ディ
スク基盤、２に係合位置決め部材、３に固定のための接
着剤である。光ディスク基盤にポリカーボネート樹脂あ
るいけアクリル樹脂などで出来ている円盤である。係合
位置決め部材にステンレスなどの磁性を有する金属で出
来ており、周知の通り光ディスク装置のスピンドルと係
合する。The present invention will be explained in detail below based on the drawings. Figure 1 is a sectional view of one embodiment of the present invention, in which 1 is an optical disk base, 2 is an engagement positioning member, and 3 is an adhesive for fixing. be. It is a disk made of polycarbonate resin or acrylic resin with an optical disk base. The engagement positioning member is made of a magnetic metal such as stainless steel, and engages with the spindle of an optical disc device, as is well known.
係合位置決め部材と光ディスク基盤との固定は、光ディ
スク基盤の中心穴部と係合位置決め部材の中心部の円筒
部でのみおこなわｎている。接触範囲が狭いため、接着
剤の固化する際及び光ディスク使用環境の温度変化によ
る熱膨張により光ディスク基盤に発生する応力は小さい
。また、応力が発生しても記録領域から遠いため、記録
領域には影響をおよぼざない。光ディスク基盤の中心穴
径を任意に変えることにより、光ディスク基盤と係合位
置決め部材の固定力及び複屈折は最適に選ぶことが出来
る。なお本実施例でに、取り付は高さや面プレ精度など
の取り付は精度を向上させるため、係合位置決め部材の
外周部が光ディスク基盤と接触しているが、この部分を
接触プせず逃がす構成とすることも可能である。本実施
例でに固定手段として接着剤による接着を用いｔが、熱
溶着や圧入などの手段を用いても良い。The engagement positioning member and the optical disc base are fixed only through the center hole of the optical disc base and the central cylindrical portion of the engagement positioning member. Since the contact area is narrow, the stress generated on the optical disk base due to thermal expansion caused by the solidification of the adhesive and temperature changes in the environment in which the optical disk is used is small. Furthermore, even if stress occurs, it will not affect the recording area because it is far from the recording area. By arbitrarily changing the diameter of the center hole of the optical disc base, the fixing force and birefringence between the optical disc base and the engagement positioning member can be optimally selected. In this example, in order to improve the mounting accuracy such as the height and surface pressure precision, the outer peripheral part of the engagement positioning member is in contact with the optical disc base, but this part was not touched. It is also possible to have a configuration in which it escapes. Although adhesive bonding is used as the fixing means in this embodiment, other means such as thermal welding or press fitting may also be used.
ＷＩＪ３図に、従来の技術による光ディスク媒体の複屈
折の大きさ４と本発明による光ディスク媒体の複屈折の
大きさ５の図であり、縦軸に複屈折の大きさ、横軸は複
屈折を測定し九光ディスク基盤の半径位置である。光デ
ィスク媒体には図に示し比記録領域から外周側に向かっ
て記録を行う。従来の技術による光ディスク媒体の場合
、係合位置決め部材に近い内周部で非常に複屈折が大き
くなっている。記録領域でも複屈折ｆ’ｌ ６０ ｎ
ｍ以上あり、信号の劣化が生じ、記録ｇ ｎ、 ｅデー
タの読み出しに困難である。本発明による光ディスク媒
体の場合、複屈折の大きさに充分小フく、信号の劣化が
生じない。その定め光ディスク装置で読み取りエラーを
生じることがなく、光ディスク装置の信頼性が飛躍的に
向上し念。Figure WIJ3 shows the magnitude of birefringence 4 of an optical disc medium according to the conventional technology and the magnitude 5 of birefringence of an optical disc medium according to the present invention, where the vertical axis represents the magnitude of birefringence and the horizontal axis represents the birefringence. Measure the radial position of the nine optical disc base. Recording is performed on the optical disc medium from the specific recording area shown in the figure toward the outer circumference. In the case of optical disc media according to the conventional technology, birefringence is extremely large in the inner circumferential portion near the engagement positioning member. Even in the recording area, birefringence f'l 60 n
m or more, signal deterioration occurs and it is difficult to read recorded g n, e data. In the case of the optical disc medium according to the present invention, the magnitude of birefringence is sufficiently small and signal deterioration does not occur. This ensures that there will be no reading errors in the optical disc device, and the reliability of the optical disc device will be dramatically improved.
なお本実施例では係合位置決め部材を光ディスク媒体の
片面にのみ取り付けｔ場合を示しｔが、両面に取り付け
る場合でも全く同様である。In this embodiment, the case where the engagement positioning member is attached only to one side of the optical disk medium is shown, but the same applies even when it is attached to both sides.
以上述べたように本発明によれば、係合位置決め部材と
光ディスク基盤との固定を光ディスク基盤の中心穴部で
おこなつｔことにより、光ディスク基盤に発生する複屈
折が小さいという効果を有する。As described above, according to the present invention, by fixing the engagement positioning member and the optical disc base at the center hole of the optical disc base, there is an effect that birefringence generated in the optical disc base is reduced.
＠１図は、本発明による光ディスク媒体の断面図。第２
図は、従来の光ディスク媒体の断面図。
第５図に、複屈折の大きづを示す図。
１・・・光ディスク基盤
２・・・係合位置決め部材
３・・・接着剤
４・・・従来の技術による光ディスク媒体の複屈折の大
きさ
５・・・本発明による光ディスク媒体の複屈折の大きさ
葛２図
そ３ｍ@1 Figure is a sectional view of an optical disc medium according to the present invention. Second
The figure is a cross-sectional view of a conventional optical disc medium. FIG. 5 is a diagram showing the magnitude of birefringence. 1... Optical disk base 2... Engagement positioning member 3... Adhesive 4... Size of birefringence of optical disk medium according to conventional technology 5... Size of birefringence of optical disk medium according to the present invention Sakuzu 2 figure 3m
Claims (1)
体において、係合位置決め部材と光ディスク基盤との固
定を光ディスク基盤の中心穴部でおこなつたことを特徴
とする光ディスク媒体。(1) An optical disc medium having an engagement positioning member in the center, characterized in that the engagement positioning member and the optical disc base are fixed in a central hole of the optical disc base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61226773A JPS6381670A (en) | 1986-09-25 | 1986-09-25 | Optical disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61226773A JPS6381670A (en) | 1986-09-25 | 1986-09-25 | Optical disk medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6381670A true JPS6381670A (en) | 1988-04-12 |
Family
ID=16850385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61226773A Pending JPS6381670A (en) | 1986-09-25 | 1986-09-25 | Optical disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6381670A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0319301A2 (en) * | 1987-12-01 | 1989-06-07 | Mitsui Petrochemical Industries, Ltd. | Information recording discs |
| US5448547A (en) * | 1987-12-01 | 1995-09-05 | Mitsui Petrochemical Industries, Ltd. | Information recording discs |
| US6098912A (en) * | 1997-03-28 | 2000-08-08 | Nittoku Engineering Co., Ltd. | Winding machine having freely positionable nozzle |
| EP1759446B2 (en) † | 2004-06-15 | 2011-08-10 | Aumann GMBH | Winding device |
| WO2018221100A1 (en) | 2017-05-31 | 2018-12-06 | 株式会社小田原エンジニアリング | Nozzle revolving device and winder |
-
1986
- 1986-09-25 JP JP61226773A patent/JPS6381670A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0319301A2 (en) * | 1987-12-01 | 1989-06-07 | Mitsui Petrochemical Industries, Ltd. | Information recording discs |
| US5301183A (en) * | 1987-12-01 | 1994-04-05 | Mitsui Petrochemical Industries Ltd. | Information recording discs |
| US5448547A (en) * | 1987-12-01 | 1995-09-05 | Mitsui Petrochemical Industries, Ltd. | Information recording discs |
| US6098912A (en) * | 1997-03-28 | 2000-08-08 | Nittoku Engineering Co., Ltd. | Winding machine having freely positionable nozzle |
| EP1759446B2 (en) † | 2004-06-15 | 2011-08-10 | Aumann GMBH | Winding device |
| WO2018221100A1 (en) | 2017-05-31 | 2018-12-06 | 株式会社小田原エンジニアリング | Nozzle revolving device and winder |
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