JP2504524Y2 - 光ヘッド - Google Patents
光ヘッドInfo
- Publication number
- JP2504524Y2 JP2504524Y2 JP1989030543U JP3054389U JP2504524Y2 JP 2504524 Y2 JP2504524 Y2 JP 2504524Y2 JP 1989030543 U JP1989030543 U JP 1989030543U JP 3054389 U JP3054389 U JP 3054389U JP 2504524 Y2 JP2504524 Y2 JP 2504524Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- optical
- optical sensor
- order diffracted
- 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 title claims description 85
- 238000001514 detection method Methods 0.000 description 32
- 238000000034 method Methods 0.000 description 26
- 230000010287 polarization Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229940028444 muse Drugs 0.000 description 1
- GMVPRGQOIOIIMI-DWKJAMRDSA-N prostaglandin E1 Chemical compound CCCCC[C@H](O)\C=C\[C@H]1[C@H](O)CC(=O)[C@@H]1CCCCCCC(O)=O GMVPRGQOIOIIMI-DWKJAMRDSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989030543U JP2504524Y2 (ja) | 1989-03-17 | 1989-03-17 | 光ヘッド |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989030543U JP2504524Y2 (ja) | 1989-03-17 | 1989-03-17 | 光ヘッド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02123722U JPH02123722U (en, 2012) | 1990-10-11 |
| JP2504524Y2 true JP2504524Y2 (ja) | 1996-07-10 |
Family
ID=31255690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989030543U Expired - Lifetime JP2504524Y2 (ja) | 1989-03-17 | 1989-03-17 | 光ヘッド |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504524Y2 (en, 2012) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2778296B2 (ja) * | 1991-07-22 | 1998-07-23 | 日本電気株式会社 | 光ヘッド装置 |
| JP2765402B2 (ja) * | 1992-10-07 | 1998-06-18 | 日本電気株式会社 | 光ヘッド装置 |
| WO2012098859A1 (ja) * | 2011-01-20 | 2012-07-26 | 三菱電機株式会社 | 光ピックアップ装置及び光ディスク装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116004A (en) * | 1980-02-20 | 1981-09-11 | Olympus Optical Co Ltd | Lens for video disk |
| JPH0810494B2 (ja) * | 1986-04-07 | 1996-01-31 | オリンパス光学工業株式会社 | 光学式ピツクアツプ |
| JPS63228431A (ja) * | 1987-03-18 | 1988-09-22 | Matsushita Electric Ind Co Ltd | 光情報ピツクアツプ装置 |
-
1989
- 1989-03-17 JP JP1989030543U patent/JP2504524Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02123722U (en, 2012) | 1990-10-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |