JPH02108247A - Optical pickup device - Google Patents

Optical pickup device

Info

Publication number
JPH02108247A
JPH02108247A JP63262259A JP26225988A JPH02108247A JP H02108247 A JPH02108247 A JP H02108247A JP 63262259 A JP63262259 A JP 63262259A JP 26225988 A JP26225988 A JP 26225988A JP H02108247 A JPH02108247 A JP H02108247A
Authority
JP
Japan
Prior art keywords
astigmatism
light source
information recording
recording carrier
laser light
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
JP63262259A
Other languages
Japanese (ja)
Inventor
Osamu Honma
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63262259A priority Critical patent/JPH02108247A/en
Publication of JPH02108247A publication Critical patent/JPH02108247A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To cancel astigmatism and to correctly read information on an information recording carrier by providing a laser light source and a converging lens so that the astigmatism directions can intersect orthogonally with each other.
CONSTITUTION: An emitting luminous flux 2 from the laser light source 1 forms a spot 5 through a beam splitter (BS) 6 and a converging lens 3 on the information recording carrier 4. The reflecting light is retrograded, reflected by BS 6 and made incident on a photodetector 7. An astigmatism direction 9 of a light source 1 and an astigmatism direction 10 of a convergence lens 3 are allowed to intersect orthogonally, with each other, the astigmatism quantity of both is made equal and then, the whole optical type astigmatism is cancelled and a satisfactory spot is obtained.
COPYRIGHT: (C)1990,JPO&Japio
JP63262259A 1988-10-18 1988-10-18 Optical pickup device Pending JPH02108247A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63262259A JPH02108247A (en) 1988-10-18 1988-10-18 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63262259A JPH02108247A (en) 1988-10-18 1988-10-18 Optical pickup device

Publications (1)

Publication Number Publication Date
JPH02108247A true JPH02108247A (en) 1990-04-20

Family

ID=17373295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63262259A Pending JPH02108247A (en) 1988-10-18 1988-10-18 Optical pickup device

Country Status (1)

Country Link
JP (1) JPH02108247A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0689458A (en) * 1992-09-08 1994-03-29 Alps Electric Co Ltd Optical pickup and adjusting method for optical pickup
JP2006164586A (en) * 2004-12-03 2006-06-22 Hitachi Maxell Ltd Coin cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0689458A (en) * 1992-09-08 1994-03-29 Alps Electric Co Ltd Optical pickup and adjusting method for optical pickup
JP2006164586A (en) * 2004-12-03 2006-06-22 Hitachi Maxell Ltd Coin cell

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