JPH051532B2 - - Google Patents
Info
- Publication number
- JPH051532B2 JPH051532B2 JP60100712A JP10071285A JPH051532B2 JP H051532 B2 JPH051532 B2 JP H051532B2 JP 60100712 A JP60100712 A JP 60100712A JP 10071285 A JP10071285 A JP 10071285A JP H051532 B2 JPH051532 B2 JP H051532B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- focus
- reflected
- reflected light
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 31
- 238000003384 imaging method Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 claims 1
- 230000004075 alteration Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10071285A JPS61258339A (ja) | 1985-05-13 | 1985-05-13 | 光学的記録再生装置 |
US06/744,480 US4724533A (en) | 1984-06-15 | 1985-06-13 | Optical head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10071285A JPS61258339A (ja) | 1985-05-13 | 1985-05-13 | 光学的記録再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61258339A JPS61258339A (ja) | 1986-11-15 |
JPH051532B2 true JPH051532B2 (de) | 1993-01-08 |
Family
ID=14281272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10071285A Granted JPS61258339A (ja) | 1984-06-15 | 1985-05-13 | 光学的記録再生装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61258339A (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH077518B2 (ja) * | 1988-08-31 | 1995-01-30 | 松下電器産業株式会社 | 自動焦点調整装置 |
JPH0728578Y2 (ja) * | 1988-09-22 | 1995-06-28 | ソニー株式会社 | 光学ヘッド |
US5315574A (en) * | 1988-10-28 | 1994-05-24 | Matsushita Electric Industrial Co., Ltd. | Optical head with polarized beam hologram |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5956234A (ja) * | 1982-09-24 | 1984-03-31 | Sony Corp | 光学式再生装置 |
JPS60171643A (ja) * | 1984-02-17 | 1985-09-05 | Mitsubishi Electric Corp | 光デイスクヘツドのフオ−カスずれ検出装置 |
JPS61198456A (ja) * | 1985-02-28 | 1986-09-02 | Canon Inc | 光ピツクアツプ |
JPS61198457A (ja) * | 1985-02-28 | 1986-09-02 | Canon Inc | 光ピツクアツプ |
-
1985
- 1985-05-13 JP JP10071285A patent/JPS61258339A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5956234A (ja) * | 1982-09-24 | 1984-03-31 | Sony Corp | 光学式再生装置 |
JPS60171643A (ja) * | 1984-02-17 | 1985-09-05 | Mitsubishi Electric Corp | 光デイスクヘツドのフオ−カスずれ検出装置 |
JPS61198456A (ja) * | 1985-02-28 | 1986-09-02 | Canon Inc | 光ピツクアツプ |
JPS61198457A (ja) * | 1985-02-28 | 1986-09-02 | Canon Inc | 光ピツクアツプ |
Also Published As
Publication number | Publication date |
---|---|
JPS61258339A (ja) | 1986-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |