JPS52119907A - Light beam branching device in video disc reproducers - Google Patents
Light beam branching device in video disc reproducersInfo
- Publication number
- JPS52119907A JPS52119907A JP3519776A JP3519776A JPS52119907A JP S52119907 A JPS52119907 A JP S52119907A JP 3519776 A JP3519776 A JP 3519776A JP 3519776 A JP3519776 A JP 3519776A JP S52119907 A JPS52119907 A JP S52119907A
- Authority
- JP
- Japan
- Prior art keywords
- reproducers
- light beam
- video disc
- branching device
- beam branching
- 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
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To obtain a focus adjsuting beam parallel to signal-reading light beams and simplify constitution by disposing a light transmission plate formed with reflection type diffraction grating on the side opposite to the incident side in the optical path of light.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51035197A JPS5827890B2 (en) | 1976-04-01 | 1976-04-01 | Optical beam branching device in video disc playback device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51035197A JPS5827890B2 (en) | 1976-04-01 | 1976-04-01 | Optical beam branching device in video disc playback device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS52119907A true JPS52119907A (en) | 1977-10-07 |
JPS5827890B2 JPS5827890B2 (en) | 1983-06-13 |
Family
ID=12435126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51035197A Expired JPS5827890B2 (en) | 1976-04-01 | 1976-04-01 | Optical beam branching device in video disc playback device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5827890B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62142723U (en) * | 1986-02-27 | 1987-09-09 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210386U (en) * | 1985-07-04 | 1987-01-22 |
-
1976
- 1976-04-01 JP JP51035197A patent/JPS5827890B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62142723U (en) * | 1986-02-27 | 1987-09-09 |
Also Published As
Publication number | Publication date |
---|---|
JPS5827890B2 (en) | 1983-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040622 |
|
A313 | Final decision of rejection without a dissenting response from the applicant |
Effective date: 20041011 Free format text: JAPANESE INTERMEDIATE CODE: A313 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20041116 |