JPS53131007A - Automatic focusing device - Google Patents
Automatic focusing deviceInfo
- Publication number
- JPS53131007A JPS53131007A JP4516277A JP4516277A JPS53131007A JP S53131007 A JPS53131007 A JP S53131007A JP 4516277 A JP4516277 A JP 4516277A JP 4516277 A JP4516277 A JP 4516277A JP S53131007 A JPS53131007 A JP S53131007A
- Authority
- JP
- Japan
- Prior art keywords
- automatic focusing
- focusing device
- objective lens
- disc
- video 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
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To prevent an objective lens from contacting with a video disc, even when the lens comes abnormally close to the disc, by providing a stopper in the objective lens moving mechanism of the video disc.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4516277A JPS53131007A (en) | 1977-04-21 | 1977-04-21 | Automatic focusing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4516277A JPS53131007A (en) | 1977-04-21 | 1977-04-21 | Automatic focusing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53131007A true JPS53131007A (en) | 1978-11-15 |
Family
ID=12711557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4516277A Pending JPS53131007A (en) | 1977-04-21 | 1977-04-21 | Automatic focusing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53131007A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5625335U (en) * | 1979-07-31 | 1981-03-07 | ||
JPS60251529A (en) * | 1984-05-25 | 1985-12-12 | Sony Corp | Optical disk player |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5121783A (en) * | 1974-08-19 | 1976-02-21 | Hitachi Ltd | Handotaiuehano peretsutokahoho |
-
1977
- 1977-04-21 JP JP4516277A patent/JPS53131007A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5121783A (en) * | 1974-08-19 | 1976-02-21 | Hitachi Ltd | Handotaiuehano peretsutokahoho |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5625335U (en) * | 1979-07-31 | 1981-03-07 | ||
JPS60251529A (en) * | 1984-05-25 | 1985-12-12 | Sony Corp | Optical disk player |
JPH0473219B2 (en) * | 1984-05-25 | 1992-11-20 | Sony Corp |
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