JPS63193221U - - Google Patents
Info
- Publication number
- JPS63193221U JPS63193221U JP1987081957U JP8195787U JPS63193221U JP S63193221 U JPS63193221 U JP S63193221U JP 1987081957 U JP1987081957 U JP 1987081957U JP 8195787 U JP8195787 U JP 8195787U JP S63193221 U JPS63193221 U JP S63193221U
- Authority
- JP
- Japan
- Prior art keywords
- parallel beam
- lens
- recording medium
- information recording
- semiconductor laser
- 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 7
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図はこの考案の一実施例を示す概略側面図
、第２図ａは光軸ずれ−平行光束強度分布特性図
、第２図ｂはフイルタ透過率特性図、第２図ｃは
修正された対物レンズへの入射平行光束の強度分
布特性図、第３図は従来例を示す光ピツクアツプ
光学系の側面図、第４図はトラツク用の検出素子
の正面図、第５図はトラツクエラー検出動作を示
す説明図、第６図はトラツク信号の波形図、第７
図はフアーフイールドパターン特性図、第８図は
説明図、第９図はトラツク制御信号に誤差を生ず
る理由を示す説明図、第１０図は半導体レーザ傾
き−トラツク制御信号誤差特性図である。
１…半導体レーザ、２…カップリングレンズ、
５…対物レンズ、６…光情報記録媒体、１４…フ
イルタ。
Fig. 1 is a schematic side view showing an embodiment of this invention, Fig. 2a is a characteristic diagram of optical axis deviation-parallel beam intensity distribution, Fig. 2b is a filter transmittance characteristic diagram, and Fig. 2c is a modified one. Fig. 3 is a side view of a conventional optical pickup optical system, Fig. 4 is a front view of a detection element for tracking, and Fig. 5 is a track error detection diagram. An explanatory diagram showing the operation, Figure 6 is a waveform diagram of the track signal, Figure 7 is a waveform diagram of the track signal.
8 is an explanatory diagram, FIG. 9 is an explanatory diagram showing the reason why an error occurs in the track control signal, and FIG. 10 is a diagram of the semiconductor laser tilt-track control signal error characteristic. 1... Semiconductor laser, 2... Coupling lens,
5... Objective lens, 6... Optical information recording medium, 14... Filter.
Claims (1)
レーザと、この半導体レーザからのレーザ光を平
行光束にするカツプリングレンズと、この平行光
束を前記光情報記録媒体上に微小スポツトとして
集光させる対物レンズとを備えた光ピツクアツプ
装置において、前記対物レンズに対して入射させ
る平行光束の強度分布を均一化させるフイルタを
設けたことを特徴とする光ピツクアツプ装置。 An optical information recording medium, a semiconductor laser that emits a laser beam, a coupling lens that converts the laser beam from the semiconductor laser into a parallel beam, and an objective that focuses the parallel beam onto the optical information recording medium as a minute spot. 1. An optical pickup device comprising a lens, further comprising a filter for uniformizing the intensity distribution of a parallel beam of light incident on the objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987081957U JPS63193221U (en) | 1987-05-28 | 1987-05-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987081957U JPS63193221U (en) | 1987-05-28 | 1987-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63193221U true JPS63193221U (en) | 1988-12-13 |
Family
ID=30934173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987081957U Pending JPS63193221U (en) | 1987-05-28 | 1987-05-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63193221U (en) |
-
1987
- 1987-05-28 JP JP1987081957U patent/JPS63193221U/ja active Pending
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