JPH0519853Y2 - - Google Patents
Info
- Publication number
- JPH0519853Y2 JPH0519853Y2 JP3946286U JP3946286U JPH0519853Y2 JP H0519853 Y2 JPH0519853 Y2 JP H0519853Y2 JP 3946286 U JP3946286 U JP 3946286U JP 3946286 U JP3946286 U JP 3946286U JP H0519853 Y2 JPH0519853 Y2 JP H0519853Y2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- light source
- optical
- pickup device
- astigmatism
- 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 19
- 201000009310 astigmatism Diseases 0.000 description 13
- 239000004065 semiconductor Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3946286U JPH0519853Y2 (US07943777-20110517-C00090.png) | 1986-03-18 | 1986-03-18 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3946286U JPH0519853Y2 (US07943777-20110517-C00090.png) | 1986-03-18 | 1986-03-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62153621U JPS62153621U (US07943777-20110517-C00090.png) | 1987-09-29 |
JPH0519853Y2 true JPH0519853Y2 (US07943777-20110517-C00090.png) | 1993-05-25 |
Family
ID=30852649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3946286U Expired - Lifetime JPH0519853Y2 (US07943777-20110517-C00090.png) | 1986-03-18 | 1986-03-18 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0519853Y2 (US07943777-20110517-C00090.png) |
-
1986
- 1986-03-18 JP JP3946286U patent/JPH0519853Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS62153621U (US07943777-20110517-C00090.png) | 1987-09-29 |
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