JPS5856235A - 光学的トラツク追跡装置 - Google Patents

光学的トラツク追跡装置

Info

Publication number
JPS5856235A
JPS5856235A JP15208281A JP15208281A JPS5856235A JP S5856235 A JPS5856235 A JP S5856235A JP 15208281 A JP15208281 A JP 15208281A JP 15208281 A JP15208281 A JP 15208281A JP S5856235 A JPS5856235 A JP S5856235A
Authority
JP
Japan
Prior art keywords
optical
photodetector
light beam
track
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.)
Granted
Application number
JP15208281A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0323977B2 (OSRAM
Inventor
Toshiaki Tsuyoshi
敏明 津吉
Ryuichi Koike
隆一 小池
Seiji Yonezawa
米沢　成二
Toshio Sugiyama
俊夫 杉山
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 true JPS5856235A (ja) 1983-04-02
JPH0323977B2 JPH0323977B2 (OSRAM) 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 (OSRAM)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0366032A (ja) * 1989-08-04 1991-03-20 Matsushita Electric Ind Co Ltd 光学ヘッド
JPH0366033A (ja) * 1989-08-04 1991-03-20 Matsushita Electric Ind Co Ltd 光学ヘッド

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50115546A (OSRAM) * 1974-02-20 1975-09-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50115546A (OSRAM) * 1974-02-20 1975-09-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0366032A (ja) * 1989-08-04 1991-03-20 Matsushita Electric Ind Co Ltd 光学ヘッド
JPH0366033A (ja) * 1989-08-04 1991-03-20 Matsushita Electric Ind Co Ltd 光学ヘッド

Also Published As

Publication number Publication date
JPH0323977B2 (OSRAM) 1991-04-02

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