JPH0431087B2 - - Google Patents
Info
- Publication number
- JPH0431087B2 JPH0431087B2 JP59087854A JP8785484A JPH0431087B2 JP H0431087 B2 JPH0431087 B2 JP H0431087B2 JP 59087854 A JP59087854 A JP 59087854A JP 8785484 A JP8785484 A JP 8785484A JP H0431087 B2 JPH0431087 B2 JP H0431087B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- group
- focal length
- condition
- recording
- 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 6
- 239000002131 composite material Substances 0.000 claims description 2
- 230000004075 alteration Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 3
- 239000006059 cover glass Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Lenses (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8785484A JPS60232519A (ja) | 1984-05-02 | 1984-05-02 | 光情報記録・再生用対物レンズ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8785484A JPS60232519A (ja) | 1984-05-02 | 1984-05-02 | 光情報記録・再生用対物レンズ |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60232519A JPS60232519A (ja) | 1985-11-19 |
JPH0431087B2 true JPH0431087B2 (zh) | 1992-05-25 |
Family
ID=13926468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8785484A Granted JPS60232519A (ja) | 1984-05-02 | 1984-05-02 | 光情報記録・再生用対物レンズ |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60232519A (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4927247A (en) * | 1988-05-13 | 1990-05-22 | Matsushita Electric Industrial Co., Ltd. | Objective lens for optical disk system and optical head using the same |
FR2642883B1 (zh) * | 1989-02-09 | 1995-06-02 | Asahi Optical Co Ltd | |
US5491587A (en) * | 1989-02-28 | 1996-02-13 | Asahi Kogaku Kogyo Kabushiki Kaisha | Collimating lens for optical system using semiconductor laser |
JPH02269303A (ja) * | 1989-04-11 | 1990-11-02 | Asahi Optical Co Ltd | 光ディスク用色収差補正レンズ |
JP2784041B2 (ja) * | 1989-05-31 | 1998-08-06 | 株式会社リコー | 光ディスク用対物レンズ |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4919087U (zh) * | 1972-05-27 | 1974-02-18 | ||
JPS5334522A (en) * | 1976-09-10 | 1978-03-31 | Minolta Camera Co Ltd | Soft focus lens |
-
1984
- 1984-05-02 JP JP8785484A patent/JPS60232519A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4919087U (zh) * | 1972-05-27 | 1974-02-18 | ||
JPS5334522A (en) * | 1976-09-10 | 1978-03-31 | Minolta Camera Co Ltd | Soft focus lens |
Also Published As
Publication number | Publication date |
---|---|
JPS60232519A (ja) | 1985-11-19 |
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