JPS5817630U - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPS5817630U JPS5817630U JP11250581U JP11250581U JPS5817630U JP S5817630 U JPS5817630 U JP S5817630U JP 11250581 U JP11250581 U JP 11250581U JP 11250581 U JP11250581 U JP 11250581U JP S5817630 U JPS5817630 U JP S5817630U
- Authority
- JP
- Japan
- Prior art keywords
- pickup device
- optical pickup
- laser beam
- photosensor
- sensor elements
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図ａ ” ｆ及び第２図は従来技術による光ピツク
アップ装置の説明図、第３図ａ〜ｄは本考案による光ピ
ツクアップ装置の説明図である。
１・・・・・・半導体レーザ、２・・・・・・対物レン
ズ、′３・・・・・・情報記録ディスク、４・・・・・
・偏光ビームスプリッタ、５・・・・・・シリンドリカ
ルレンズ、６・・・・・・４分割−光センサ、６′・・
・・・・２分割光センサ、７・・・・・・加’Ｎ−器、
８，９・・・・・・差動増幅器、１０・・・・・・ロー
パスフィルタ、１１・・・・・・ディスク３上の情報記
録トラック、１２・・・・・・光スポット、１３・・・
・・・加算増幅器、１４・・・・・・可変抵抗器。1A to 2F are explanatory diagrams of an optical pickup device according to the prior art, and FIGS. 3A to 3D are explanatory diagrams of an optical pickup device according to the present invention. 1... Semiconductor laser, 2... Objective lens, '3... Information recording disk, 4...
・Polarizing beam splitter, 5...Cylindrical lens, 6...4 division - optical sensor, 6'...
... 2-split optical sensor, 7... adder,
8, 9... Differential amplifier, 10... Low pass filter, 11... Information recording track on disk 3, 12... Light spot, 13...・・・
...Summing amplifier, 14...Variable resistor.
Claims (2)
点収差式に光センサ上に収束してフォーカシングエラー
信号を得る光学系を有する光ピツクアップ装置において
、前記光センサは該光センサ上に照射されるレーザビー
ムの形状が合焦点からずれた場合に生ずる１１点収差に
よる楕円の軸に沿って４個のセンサ素子に４等分４分割
され、その直交軸の１軸について、前記センサ素子間の
間隔を大きく取った不惑帯を設けて構成されることを特
徴とする光ピツクアップ装置。(1) In an optical pickup device having an optical system for astigmatically converging a reflected laser beam from an information recording disk onto a photosensor to obtain a focusing error signal, the photosensor is provided with a laser beam irradiated onto the photosensor. The shape of the laser beam is divided into four equal parts into four sensor elements along the axis of the ellipse due to 11-point aberration that occurs when the shape of the laser beam deviates from the focused point. An optical pickup device characterized in that it is constructed by providing fuwazai with large intervals.
クアップ装置において、フォーカシングエラー信号は、
前記４個のセンサ素子からの出力信号の和をとり、合焦
点状態の場合の前記出力信号の和に相当するバイアスを
設定することにより得、トラッキングエラー信号は、前
記不感帯の軸と直交する軸を中心として同一の側に配置
された２個ずつのセンサ素子からの出力信号の和をとり
、これらの和信号の差をとることにより得ることを特徴
とする光ピツクアップ装置。(2) In the optical pickup device according to claim 1 of the utility model registration, the focusing error signal is
The tracking error signal is obtained by summing the output signals from the four sensor elements and setting a bias corresponding to the sum of the output signals in the in-focus state. 1. An optical pickup device characterized in that the output signal is obtained by summing the output signals from two sensor elements arranged on the same side with the center at , and calculating the difference between these sum signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11250581U JPS5817630U (en) | 1981-07-28 | 1981-07-28 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11250581U JPS5817630U (en) | 1981-07-28 | 1981-07-28 | Optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5817630U true JPS5817630U (en) | 1983-02-03 |
| JPS6215865Y2 JPS6215865Y2 (en) | 1987-04-22 |
Family
ID=29906831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11250581U Granted JPS5817630U (en) | 1981-07-28 | 1981-07-28 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5817630U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6094094U (en) * | 1983-11-30 | 1985-06-27 | 吉田マグネツト産業株式会社 | Seaweed cleaning equipment |
-
1981
- 1981-07-28 JP JP11250581U patent/JPS5817630U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6094094U (en) * | 1983-11-30 | 1985-06-27 | 吉田マグネツト産業株式会社 | Seaweed cleaning equipment |
| JPS6144628Y2 (en) * | 1983-11-30 | 1986-12-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6215865Y2 (en) | 1987-04-22 |
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