JPS639304B2 - - Google Patents
Info
- Publication number
- JPS639304B2 JPS639304B2 JP11445280A JP11445280A JPS639304B2 JP S639304 B2 JPS639304 B2 JP S639304B2 JP 11445280 A JP11445280 A JP 11445280A JP 11445280 A JP11445280 A JP 11445280A JP S639304 B2 JPS639304 B2 JP S639304B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- objective lens
- reflected
- track
- photodetector
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 41
- 238000001514 detection method Methods 0.000 claims description 22
- 230000004907 flux Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 11
- 210000001747 pupil Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11445280A JPS5737745A (en) | 1980-08-19 | 1980-08-19 | Optical information reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11445280A JPS5737745A (en) | 1980-08-19 | 1980-08-19 | Optical information reader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737745A JPS5737745A (en) | 1982-03-02 |
| JPS639304B2 true JPS639304B2 (US06818201-20041116-C00086.png) | 1988-02-26 |
Family
ID=14638076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11445280A Granted JPS5737745A (en) | 1980-08-19 | 1980-08-19 | Optical information reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5737745A (US06818201-20041116-C00086.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH037484Y2 (US06818201-20041116-C00086.png) * | 1986-01-29 | 1991-02-25 | ||
| JPH0935284A (ja) * | 1995-07-17 | 1997-02-07 | Fujitsu Ltd | 光ディスク装置 |
-
1980
- 1980-08-19 JP JP11445280A patent/JPS5737745A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737745A (en) | 1982-03-02 |
