JPS6257215U - - Google Patents
Info
- Publication number
- JPS6257215U JPS6257215U JP14765285U JP14765285U JPS6257215U JP S6257215 U JPS6257215 U JP S6257215U JP 14765285 U JP14765285 U JP 14765285U JP 14765285 U JP14765285 U JP 14765285U JP S6257215 U JPS6257215 U JP S6257215U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- optical lens
- utility
- model registration
- cylindrical
- 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 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 1
Landscapes
- Lens Barrels (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案の実施例を示す図でイは正面図
ロはＸ―Ｘ断面図である。第２図は本考案の他の
実施例の断面図、第３図は従来の光学ヘツドの概
略構成図、第４図はエラー修正用サーボの原理の
説明図でイはフオーカスサーボロはトラツキング
サーボの説明図、第５図は３ビーム法によるトラ
ツキングサーボの説明図でイは凹レンズのない場
合ロは凹レンズを使用した場合の図である。
１…レーザーダイオード、２…コリメートレン
ズ、３…回折格子、４…ビームスプリツタ、５…
１／４波長板、６…対物レンズ、７…デイスク、
８…受光レンズ、９…円筒レンズ、１０…受光素
子、１１…ピツト、１２…凹レンズ、１３…方向
目印、１４…リング。
FIG. 1 is a diagram showing an embodiment of the present invention, in which A is a front view and B is a cross-sectional view taken along line XX. Fig. 2 is a sectional view of another embodiment of the present invention, Fig. 3 is a schematic diagram of a conventional optical head, and Fig. 4 is an explanatory diagram of the principle of an error correction servo. FIG. 5 is an explanatory diagram of a tracking servo using a three-beam method, where A is a diagram without a concave lens and B is a diagram when a concave lens is used. 1... Laser diode, 2... Collimating lens, 3... Diffraction grating, 4... Beam splitter, 5...
1/4 wavelength plate, 6... objective lens, 7... disk,
8... Light receiving lens, 9... Cylindrical lens, 10... Light receiving element, 11... Pit, 12... Concave lens, 13... Direction mark, 14... Ring.
Claims (1)
おいて、合成樹脂を成型し、一面を円筒系、他面
を凹形の球面で形成し、円筒面の軸に対し一定の
角度の方向目印を外周上に有することを特徴とす
る光学レンズ。 (2) レンズ周辺にリング状補強部を一体成型し
たことを特徴とする実用新案登録請求の範囲第１
項記載の光学レンズ。[Scope of Claim for Utility Model Registration] (1) An optical lens used for the light receiving part of an optical head is made of synthetic resin, one side is cylindrical, the other side is a concave spherical surface, and the lens is shaped with respect to the axis of the cylindrical surface. An optical lens characterized by having a direction mark at a constant angle on its outer periphery. (2) Utility model registration claim No. 1 characterized in that a ring-shaped reinforcing portion is integrally molded around the lens.
Optical lens described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14765285U JPS6257215U (en) | 1985-09-26 | 1985-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14765285U JPS6257215U (en) | 1985-09-26 | 1985-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6257215U true JPS6257215U (en) | 1987-04-09 |
Family
ID=31061207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14765285U Pending JPS6257215U (en) | 1985-09-26 | 1985-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6257215U (en) |
-
1985
- 1985-09-26 JP JP14765285U patent/JPS6257215U/ja active Pending
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