JPS6419539A - Optical head - Google Patents

Optical head

Info

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
Application number
JP62175652A
Other languages
Japanese (ja)
Inventor
Masahisa Jinbo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP62175652A priority Critical patent/JPS6419539A/en
Publication of JPS6419539A publication Critical patent/JPS6419539A/en
Pending legal-status Critical Current

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  • 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.
JP62175652A 1987-07-14 1987-07-14 Optical head Pending JPS6419539A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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