JPH0292826U - - Google Patents
Info
- Publication number
- JPH0292826U JPH0292826U JP16978788U JP16978788U JPH0292826U JP H0292826 U JPH0292826 U JP H0292826U JP 16978788 U JP16978788 U JP 16978788U JP 16978788 U JP16978788 U JP 16978788U JP H0292826 U JPH0292826 U JP H0292826U
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- prism
- optical disk
- objective lens
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図は本考案による光ピツクアツプの光学装
置を示す平面図、第２図はその出光面の部分を示
す拡大平面図、第３図は光経路の計算のための説
明図、第４図は半導体レーザの内部構造を示す透
視斜視図、第５図は従来の光ピツクアツプの光学
装置を示す平面図、第６図はその側面図である。
１……半導体レーザ（発光素子）、３……ビー
ム整形プリズム、１４……第２のプリズム、６…
…対物レンズ、８……トラツキングエラー検出用
の受光素子、１１……フオーカスエラー検出用の
受光素子、１２……モニター受光素子、Ａ……光
分割面、Ｅ１……出光面。
Fig. 1 is a plan view showing the optical device of the optical pickup according to the present invention, Fig. 2 is an enlarged plan view showing the light emitting surface portion thereof, Fig. 3 is an explanatory diagram for calculating the optical path, and Fig. 4 is FIG. 5 is a perspective view showing the internal structure of a semiconductor laser, FIG. 5 is a plan view showing a conventional optical pickup optical device, and FIG. 6 is a side view thereof. 1... Semiconductor laser (light emitting element), 3... Beam shaping prism, 14... Second prism, 6...
...Objective lens, 8... Light receiving element for tracking error detection, 11... Light receiving element for focusing error detection, 12... Monitor light receiving element, A... Light splitting surface, E 1 ... Light emitting surface.
Claims (1)
配置されて、このビーム整形プリズムとこれに接
合される第２のプリズムとの境界面に光を透過し
且つ反射する光分割面が傾斜して形成されており
、この光分割面を透過して第２のプリズムから出
る光路方向に光デイスクに対向する対物レンズが
配置され、光デイスクの記録面から反射されて対
物レンズを通過した戻り光が前記光分割面によつ
て反射される光路方向には、前記光デイスクの記
録面に形成される光のスポツトによる走査エラー
を検知するためのエラー検知部が設けられており
且つ、前記第２のプリズムの対物レンズ方向への
出光面は、発光素子から発せられ且つ前記光分割
面を透過する光の光軸に垂直な面に対して傾斜し
て形成されて成る光ピツクアツプの光学装置。 A beam shaping prism is disposed on the light emission path of the light emitting element, and a light splitting surface that transmits and reflects light is formed at an inclined interface between the beam shaping prism and a second prism joined to the beam shaping prism. An objective lens is arranged facing the optical disk in the direction of the optical path that passes through this light splitting surface and exits from the second prism, and the return light that is reflected from the recording surface of the optical disk and passes through the objective lens is An error detection section for detecting a scanning error due to a light spot formed on the recording surface of the optical disk is provided in the direction of the optical path reflected by the splitting surface, and an error detection section is provided for detecting a scanning error caused by a spot of light formed on the recording surface of the optical disk. An optical device for an optical pickup, in which a light exiting surface toward an objective lens is formed to be inclined with respect to a plane perpendicular to the optical axis of light emitted from a light emitting element and transmitted through the light splitting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988169787U JPH075550Y2 (en) | 1988-12-28 | 1988-12-28 | Optical device for optical pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988169787U JPH075550Y2 (en) | 1988-12-28 | 1988-12-28 | Optical device for optical pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292826U true JPH0292826U (en) | 1990-07-24 |
| JPH075550Y2 JPH075550Y2 (en) | 1995-02-08 |
Family
ID=31460154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988169787U Expired - Lifetime JPH075550Y2 (en) | 1988-12-28 | 1988-12-28 | Optical device for optical pickup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075550Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6361186A (en) * | 1986-08-21 | 1988-03-17 | フラマト−ム | Foundation of nuclear-reactor storage closing instrument |
-
1988
- 1988-12-28 JP JP1988169787U patent/JPH075550Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6361186A (en) * | 1986-08-21 | 1988-03-17 | フラマト−ム | Foundation of nuclear-reactor storage closing instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075550Y2 (en) | 1995-02-08 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |