JPH0323977B2 - - Google Patents

Info

Publication number
JPH0323977B2
JPH0323977B2 JP56152082A JP15208281A JPH0323977B2 JP H0323977 B2 JPH0323977 B2 JP H0323977B2 JP 56152082 A JP56152082 A JP 56152082A JP 15208281 A JP15208281 A JP 15208281A JP H0323977 B2 JPH0323977 B2 JP H0323977B2
Authority
JP
Japan
Prior art keywords
optical
photodetector
track
light beam
optical system
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
Application number
JP56152082A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5856235A (ja
Inventor
Toshiaki Tsuyoshi
Ryuichi Koike
Seiji Yonezawa
Toshio Sugyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15208281A priority Critical patent/JPS5856235A/ja
Publication of JPS5856235A publication Critical patent/JPS5856235A/ja
Publication of JPH0323977B2 publication Critical patent/JPH0323977B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP15208281A 1981-09-28 1981-09-28 光学的トラツク追跡装置 Granted JPS5856235A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15208281A JPS5856235A (ja) 1981-09-28 1981-09-28 光学的トラツク追跡装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15208281A JPS5856235A (ja) 1981-09-28 1981-09-28 光学的トラツク追跡装置

Publications (2)

Publication Number Publication Date
JPS5856235A JPS5856235A (ja) 1983-04-02
JPH0323977B2 true JPH0323977B2 (pm) 1991-04-02

Family

ID=15532655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15208281A Granted JPS5856235A (ja) 1981-09-28 1981-09-28 光学的トラツク追跡装置

Country Status (1)

Country Link
JP (1) JPS5856235A (pm)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0770073B2 (ja) * 1989-08-04 1995-07-31 松下電器産業株式会社 光学ヘッド
JPH0366032A (ja) * 1989-08-04 1991-03-20 Matsushita Electric Ind Co Ltd 光学ヘッド

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250130B2 (pm) * 1974-02-20 1977-12-22

Also Published As

Publication number Publication date
JPS5856235A (ja) 1983-04-02

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