JPS6419539A - Optical head - Google Patents
Optical headInfo
- Publication number
- JPS6419539A JPS6419539A JP62175652A JP17565287A JPS6419539A JP S6419539 A JPS6419539 A JP S6419539A JP 62175652 A JP62175652 A JP 62175652A JP 17565287 A JP17565287 A JP 17565287A JP S6419539 A JPS6419539 A JP S6419539A
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- beam splitter
- receiving part
- astigmatism
- need
- 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.)
- Pending
Links
Landscapes
- Optical Head (AREA)
Abstract
PURPOSE:To miniaturize and lighten a device by eliminating the need for a lens located between a beam splitter and light receiving part by forming the joining face of a polarizing beam splitter on a recessed cylindrical face toward the light receiving part. CONSTITUTION:The joining face 22a of the polarizing beam splitter 22 transmitting and reflecting the laser beam L emitted from a light emitting part 21 is formed on a recessed cylindrical face toward a light receiving part 25. An astigmatism is then made not to cause in the state of no focusing error. When the focusing error is generated in this state, it can be detected by generating the astigmatism. The need for the convex lens and cylindrical lens provided between the beam splitter and light receiving part heretofore is therefore eliminated and the device can be miniaturized and lightened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62175652A JPS6419539A (en) | 1987-07-14 | 1987-07-14 | Optical head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62175652A JPS6419539A (en) | 1987-07-14 | 1987-07-14 | Optical head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6419539A true JPS6419539A (en) | 1989-01-23 |
Family
ID=15999841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62175652A Pending JPS6419539A (en) | 1987-07-14 | 1987-07-14 | Optical head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6419539A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000050716A (en) * | 1999-01-14 | 2000-08-05 | 구자홍 | A beam splitter of optical pick-up device |
KR100416555B1 (en) * | 2001-12-29 | 2004-02-05 | 삼성전자주식회사 | Beam splitter and optical pick-up employing it |
-
1987
- 1987-07-14 JP JP62175652A patent/JPS6419539A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000050716A (en) * | 1999-01-14 | 2000-08-05 | 구자홍 | A beam splitter of optical pick-up device |
KR100416555B1 (en) * | 2001-12-29 | 2004-02-05 | 삼성전자주식회사 | Beam splitter and optical pick-up employing it |
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