JPS531003A - Self-focusing system - Google Patents
Self-focusing systemInfo
- Publication number
- JPS531003A JPS531003A JP7435376A JP7435376A JPS531003A JP S531003 A JPS531003 A JP S531003A JP 7435376 A JP7435376 A JP 7435376A JP 7435376 A JP7435376 A JP 7435376A JP S531003 A JPS531003 A JP S531003A
- Authority
- JP
- Japan
- Prior art keywords
- self
- focusing system
- axis
- video disc
- reproduction information
- 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
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To eliminate lens focus shift by having the axis of a cylindrical lens placed about 45° in angle against the direction of the reproduction information track of the video disc.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7435376A JPS531003A (en) | 1976-06-25 | 1976-06-25 | Self-focusing system |
GB26176/77A GB1532345A (en) | 1976-06-25 | 1977-06-22 | Information play-back apparatus |
DE2728624A DE2728624C2 (en) | 1976-06-25 | 1977-06-24 | Self-focusing device for scanning an information track contained on a recording medium |
FR7719366A FR2356333A1 (en) | 1976-06-25 | 1977-06-24 | AUTOMATIC FOCUSING DEVICE FOR OPTICAL INFORMATION REPRODUCING EQUIPMENT, ESPECIALLY FOR VIDEO DISC |
NLAANVRAGE7707071,A NL187716C (en) | 1976-06-25 | 1977-06-24 | DEVICE FOR OPTICAL READING OF INFORMATION IN TRACKS OF A RECORD MEDIUM. |
US05/810,166 US4293944A (en) | 1976-06-25 | 1977-06-27 | Information play-back apparatus with astigmatic auto-focusing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7435376A JPS531003A (en) | 1976-06-25 | 1976-06-25 | Self-focusing system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS531003A true JPS531003A (en) | 1978-01-07 |
JPS5337722B2 JPS5337722B2 (en) | 1978-10-11 |
Family
ID=13544666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7435376A Granted JPS531003A (en) | 1976-06-25 | 1976-06-25 | Self-focusing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS531003A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102553948B1 (en) * | 2023-02-14 | 2023-07-10 | 김기수 | Water treatment apparatus for reduction |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834240B2 (en) * | 1979-12-29 | 1983-07-25 | 住友金属工業株式会社 | Steel material welding method and backing device for welded steel pipes used in the welding method |
-
1976
- 1976-06-25 JP JP7435376A patent/JPS531003A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102553948B1 (en) * | 2023-02-14 | 2023-07-10 | 김기수 | Water treatment apparatus for reduction |
Also Published As
Publication number | Publication date |
---|---|
JPS5337722B2 (en) | 1978-10-11 |
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