JPS60180325U - Focus error signal detection device - Google Patents
Focus error signal detection deviceInfo
- Publication number
- JPS60180325U JPS60180325U JP6442784U JP6442784U JPS60180325U JP S60180325 U JPS60180325 U JP S60180325U JP 6442784 U JP6442784 U JP 6442784U JP 6442784 U JP6442784 U JP 6442784U JP S60180325 U JPS60180325 U JP S60180325U
- Authority
- JP
- Japan
- Prior art keywords
- error signal
- focus error
- detection device
- signal detection
- optical disc
- 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
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の光ディスクめ光学系を示すブロック図、
第２図は光電面を示す平面図、第３図は従来の改良され
たフォーカスエラー信号の光学系を示すブロック図、第
４図はこの考案の一実施例を示すフォーカスエラー信号
検出装置のブロン−り、第５図ａ、 ｂは第１の光電素
子に入射される反射光の光路、およびそのスポットを示
す説明図−である。
図中、１３は第１の偏光ビームスプリッタ、１６は中間
レンズ、１７はビームスプリッタ（フーコプリズム）、
１８ａは第１の光電素子を示す。
−−−
第２図
第４図Figure 1 is a block diagram showing a conventional optical system for optical discs.
FIG. 2 is a plan view showing the photocathode, FIG. 3 is a block diagram showing a conventional improved focus error signal optical system, and FIG. 4 is a block diagram of a focus error signal detection device showing an embodiment of this invention. FIGS. 5a and 5b are explanatory diagrams showing the optical path of reflected light incident on the first photoelectric element and its spot. In the figure, 13 is a first polarizing beam splitter, 16 is an intermediate lens, 17 is a beam splitter (Foucault prism),
18a indicates a first photoelectric element. --- Figure 2 Figure 4
Claims (1)
る光ディスクを記録、または再生する装置において、前
記光ディスクから反射された光を２分割し、前記光ディ
スクに対して共役な位置に配置されている光電素子に結
像する光学装置を設け、前記光電素子に形成ネれている
タンデルシャル方−向に分割された光電面に結像した２
個のスポットから得られる検出信号を演算することによ
ってフォーカスエラー信号を検出することを特徴とする
フォーカスエラー信号検出装置。In an apparatus for recording or reproducing an optical disc on which a pre-globe for recording information is formed, a photoelectronic device that divides the light reflected from the optical disc into two and is placed at a position conjugate to the optical disc is used. An optical device for forming an image on the element is provided, and two images are formed on the photocathode formed on the photoelectric element and divided in the tangential direction.
A focus error signal detection device characterized in that a focus error signal is detected by calculating detection signals obtained from individual spots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6442784U JPS60180325U (en) | 1984-05-02 | 1984-05-02 | Focus error signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6442784U JPS60180325U (en) | 1984-05-02 | 1984-05-02 | Focus error signal detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60180325U true JPS60180325U (en) | 1985-11-30 |
Family
ID=30595502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6442784U Pending JPS60180325U (en) | 1984-05-02 | 1984-05-02 | Focus error signal detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60180325U (en) |
-
1984
- 1984-05-02 JP JP6442784U patent/JPS60180325U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61111036U (en) | ||
| US4633454A (en) | Optical information pickup apparatus | |
| JPS60180325U (en) | Focus error signal detection device | |
| JPS58159641U (en) | Optical information recording and reproducing device | |
| JPS59157223U (en) | Optical pickup device | |
| JPS6040031U (en) | Optical disk signal detection splitter | |
| JPS60173134U (en) | Optical pick-up device | |
| JPS59138024U (en) | optical recording and reproducing device | |
| JPH0296619U (en) | ||
| JPS59157222U (en) | Optical pickup device | |
| JPH01154515U (en) | ||
| JPS5814236U (en) | optical pickup device | |
| JPS6020025U (en) | Optical disk signal detection splitter | |
| JPS5960736U (en) | light detector | |
| JPS60132620U (en) | Beam position adjustment device for optical recording and reproducing equipment | |
| JPH01113825U (en) | ||
| JPH01154514U (en) | ||
| JPH02149941A (en) | Photo detector | |
| JPS6223373B2 (en) | ||
| JPH0384912U (en) | ||
| JPS59164936U (en) | Focus error detection device in optical recording/playback equipment | |
| JPH0384913U (en) | ||
| JPS59138025U (en) | optical recording and reproducing device | |
| JPS60135818U (en) | Focus error detection device | |
| JPS6313415U (en) |