JPS6365123U - - Google Patents
Info
- Publication number
- JPS6365123U JPS6365123U JP15780186U JP15780186U JPS6365123U JP S6365123 U JPS6365123 U JP S6365123U JP 15780186 U JP15780186 U JP 15780186U JP 15780186 U JP15780186 U JP 15780186U JP S6365123 U JPS6365123 U JP S6365123U
- Authority
- JP
- Japan
- Prior art keywords
- optical pickup
- optical
- light receiving
- movable part
- array
- 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 15
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
第１図はこの考案に係る光ピツクアツプの一実
施例を示す平面図、第２図は第１図の―線断
面図、第３図はトラツキングサーボ機構の１例を
示したブロツク図、第４図はトラツキング誤差信
号を示すグラフ、第５図は直流オフセツトを含ん
だトラツキング誤差信号のグラフ、第６図はアク
セス後の可動部の振動の減衰を示すグラフ、第７
図は光ピツクアツプの作動を示す説明図、第８図
は従来の光ピツクアツプの平面図、第９図はプツ
シユプル法によるトラツキング誤差検出を説明す
るための概略図、第１０図ａ、第１１図ａ、第１
２図ａはそれぞれスポツトとピツトとの位置関係
を示す説明図、第１０図ｂ、第１１図ｂ、第１２
図ｂはそれぞれ回折像に現れる明暗の区分を示す
説明図、第１３図は正常なトラツク走査時に光検
出器上に現れた回折像を示す図、第１４図は対物
レンズが移動されたために回折像全体が下方にズ
レた状態を示す第１３図と同様な図である。
Ｂ…光ピツクアツプ、Ｄ…光学式デイスク、１
０…光ピツクアツプ本体、２０…可動部、２１…
対物レンズ、４１…位置検出器、５０…アレイ、
ＰＤ１〜ＰＤｎ…受光素子、６０…発光素子。
FIG. 1 is a plan view showing an embodiment of the optical pickup according to this invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a block diagram showing an example of the tracking servo mechanism. Fig. 4 is a graph showing the tracking error signal, Fig. 5 is a graph of the tracking error signal including DC offset, Fig. 6 is a graph showing the attenuation of vibration of the movable part after access, and Fig. 7 is a graph showing the tracking error signal including DC offset.
The figure is an explanatory diagram showing the operation of an optical pickup, Figure 8 is a plan view of a conventional optical pickup, Figure 9 is a schematic diagram for explaining tracking error detection using the push-pull method, Figures 10a and 11a. , 1st
Fig. 2a is an explanatory diagram showing the positional relationship between the spot and the pit, Fig. 10b, Fig. 11b, Fig. 12
Figure b is an explanatory diagram showing the bright and dark divisions that appear in the diffraction image, Figure 13 is a diagram showing the diffraction image that appears on the photodetector during normal track scanning, and Figure 14 is a diagram showing the diffraction image that appears on the photodetector when the objective lens is moved. 14 is a diagram similar to FIG. 13 showing a state in which the entire image is shifted downward; FIG. B...Optical pickup, D...Optical disk, 1
0... Optical pickup main body, 20... Movable part, 21...
Objective lens, 41... position detector, 50... array,
PD1 to PDn ... Light receiving element, 60... Light emitting element.
Claims (1)
ツクアツプ本体と、該光ピツクアツプ本体から出
射するビームを前記光学式デイスクに結像させる
対物レンズを保持すると共に前記光ピツクアツプ
本体に対して可動的に支持される可動部と、前記
対物レンズを前記光学式デイスクのトラツクに追
随させるトラツキングサーボ機構とを有する光ピ
ツクアツプにおいて、 前記光ピツクアツプ本体と前記可動部とのいず
れか一方に前記可動部のトラツキング駆動方向に
沿つて並列する多数の受光素子から成るアレイを
設け、他方に前記アレイを照射する発光素子を設
け、前記トラツキングサーボ機構に前記アレイの
受光状態から前記可動部のトラツキング方向への
変位位置を検知する位置検出器を設けたことを特
徴とする光ピツクアツプ。[Claims for Utility Model Registration] An optical pickup body that is reciprocated in the radial direction of an optical disk, and an objective lens that focuses a beam emitted from the optical pickup body on the optical disk, and the optical pickup body In an optical pickup having a movable part movably supported with respect to a main body, and a tracking servo mechanism for causing the objective lens to follow a track of the optical disk, either the optical pick-up main body or the movable part An array consisting of a large number of light receiving elements arranged in parallel along the tracking driving direction of the movable part is provided on one side, a light emitting element for illuminating the array is provided on the other side, and the tracking servo mechanism changes the light receiving state of the array from the light receiving state to the moving part. 1. An optical pickup characterized by being provided with a position detector for detecting the displacement position of the part in the tracking direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15780186U JPS6365123U (en) | 1986-10-15 | 1986-10-15 | |
| US07/456,068 US4956833A (en) | 1986-03-31 | 1989-12-26 | Objective driving device for an optical disk apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15780186U JPS6365123U (en) | 1986-10-15 | 1986-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365123U true JPS6365123U (en) | 1988-04-28 |
Family
ID=31080691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15780186U Pending JPS6365123U (en) | 1986-03-31 | 1986-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365123U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61198436A (en) * | 1985-02-28 | 1986-09-02 | Matsushita Electric Ind Co Ltd | Detector of position of objective lens |
-
1986
- 1986-10-15 JP JP15780186U patent/JPS6365123U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61198436A (en) * | 1985-02-28 | 1986-09-02 | Matsushita Electric Ind Co Ltd | Detector of position of objective lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0184195B1 (en) | Optical disc recording apparatus | |
| US4805162A (en) | Fine and coarse servo system for access and tracking on an optical disk | |
| US4744069A (en) | Optical disc apparatus with access system having object lens control | |
| US5018123A (en) | Optical information recording medium and method for recording information on said medium and reproducing information therefrom | |
| CA2005341A1 (en) | Recording and/or reproduction apparatus of an optical disc | |
| EP0938083A3 (en) | Optical storage device | |
| JPS6365123U (en) | ||
| EP1143428A3 (en) | Tracking servo apparatus of optical information recording and reproducing apparatus | |
| KR20000038998A (en) | Method for detecting tilt of optical disc | |
| EP0124580B1 (en) | Fine and coarse servo system for access and tracking on an optical disk | |
| CA1218148A (en) | Amplitude modulated coarse position error signal generation in an optical disk storage system employing coarse servo tracks | |
| AU2868889A (en) | Optically readable record carrier of the inscribable type and optical read apparatus for reading such a record carrier | |
| JP2741961B2 (en) | Optical information recording / reproducing device | |
| US5336872A (en) | Information recording/reproducing apparatus for use in an optical card | |
| JP2545453B2 (en) | Optical information recording / reproducing device | |
| EP0404449A3 (en) | Data-track search apparatus | |
| JPS6479940A (en) | Draw type optical disk recording and reproducing device | |
| JPH0727638B2 (en) | Optical information recording / reproducing method | |
| JPS6390036A (en) | Optical information recording and reproducing device | |
| JPH0528570Y2 (en) | ||
| JP2541043Y2 (en) | Optical disk drive | |
| JPH03207696A (en) | Optical card | |
| JPS63144426A (en) | Optical information recording and reproducing device | |
| JPS632219U (en) | ||
| JPH01121124U (en) |