JPS5897729U - Control signal detection device in optical information reproducing device - Google Patents
Control signal detection device in optical information reproducing deviceInfo
- Publication number
- JPS5897729U JPS5897729U JP19082981U JP19082981U JPS5897729U JP S5897729 U JPS5897729 U JP S5897729U JP 19082981 U JP19082981 U JP 19082981U JP 19082981 U JP19082981 U JP 19082981U JP S5897729 U JPS5897729 U JP S5897729U
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- photoelectric element
- optical information
- information reproducing
- signal detection
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は情報トラックと照射スポットの関係を示す図、
第２図は本考案の光学系の一実施例を示す図、笹３図は
従来の差動型光電素子と検出スポーツトとの関係を示す
図、第４図は本考案による差動型光電素子と検出スポッ
トとの関徳を示す図、第５図、第６図は本考案の要部の
実施例を示す図、第７図ａ、 ｂは差動型光電素子を
構成する光電素子の出力波形を示す図である。
７・・・・・・情報トラック、８・・・・・・情報媒体
、９・・・・・・照射スポット、１０・・・・・・反射
ビーム、１１・・曲差動型光電素子、１４・・・・・・
光遮断部材、１６．１８・・・・・・副光遮断部材。Figure 1 is a diagram showing the relationship between the information track and the irradiation spot.
Fig. 2 is a diagram showing an embodiment of the optical system of the present invention, Fig. 3 is a diagram showing the relationship between a conventional differential photoelectric element and a detection sport, and Fig. 4 is a diagram showing a differential photoelectric element according to the present invention. Figures 5 and 6 are diagrams showing the relationship between the element and the detection spot, Figures 5 and 6 are diagrams showing an embodiment of the main part of the present invention, and Figures 7a and b are diagrams of the photoelectric element constituting the differential type photoelectric element. FIG. 3 is a diagram showing an output waveform. 7... Information track, 8... Information medium, 9... Irradiation spot, 10... Reflected beam, 11... Curved differential photoelectric element, 14...
Light blocking member, 16.18... Sub-light blocking member.
Claims (1)
報媒体８に光ビーム２を照射スポット９として照明し、
情響媒体８からの反射ビーム１０を差動型光電素子１１
に入射し、この差動型光電素子１１を構成する光電素子
の一方を照射する１反射ビーム１０の一部を光遮断する
光遮断部材１４を設けて、差動型光電素子１１からの差
動出力より情報媒体８に対する照射スポット９の焦点制
御信号を検出する光学的情報再生装置において、前記差
動型光電素子１１を構成する対となる光電素子Ａ、 Ｂ
の内、受光量の多い光電素子の受光量を減じる副光遮断
部材１６．１８を設けてなる光学的情報再生装置におけ
る制御信号検出装置。An information medium 8 on which information such as video and audio is recorded as an information track 7 is illuminated with a light beam 2 as an irradiation spot 9,
The reflected beam 10 from the acoustic medium 8 is transmitted to a differential photoelectric element 11.
A light blocking member 14 is provided to block part of one reflected beam 10 that enters the differential photoelectric element 11 and illuminates one of the photoelectric elements constituting the differential photoelectric element 11. In an optical information reproducing device that detects a focus control signal of an irradiation spot 9 on an information medium 8 from an output, a pair of photoelectric elements A and B forming the differential photoelectric element 11 are used.
A control signal detection device for an optical information reproducing device, which is provided with a sub-light blocking member 16, 18 that reduces the amount of light received by a photoelectric element that receives a large amount of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19082981U JPS5897729U (en) | 1981-12-21 | 1981-12-21 | Control signal detection device in optical information reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19082981U JPS5897729U (en) | 1981-12-21 | 1981-12-21 | Control signal detection device in optical information reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5897729U true JPS5897729U (en) | 1983-07-02 |
Family
ID=30104329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19082981U Pending JPS5897729U (en) | 1981-12-21 | 1981-12-21 | Control signal detection device in optical information reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5897729U (en) |
-
1981
- 1981-12-21 JP JP19082981U patent/JPS5897729U/en active Pending
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