JPS55157135A - Information reader - Google Patents

Information reader

Info

Publication number
JPS55157135A
JPS55157135A JP6144379A JP6144379A JPS55157135A JP S55157135 A JPS55157135 A JP S55157135A JP 6144379 A JP6144379 A JP 6144379A JP 6144379 A JP6144379 A JP 6144379A JP S55157135 A JPS55157135 A JP S55157135A
Authority
JP
Japan
Prior art keywords
signal
recording medium
light beam
splitter
separated
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
JP6144379A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6223378B2 (enrdf_load_stackoverflow
Inventor
Kazuo Shigematsu
Manabu Yamamoto
Masahiro Oshima
Kiichi Kamiyanagi
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 JP6144379A priority Critical patent/JPS55157135A/ja
Publication of JPS55157135A publication Critical patent/JPS55157135A/ja
Publication of JPS6223378B2 publication Critical patent/JPS6223378B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP6144379A 1979-05-21 1979-05-21 Information reader Granted JPS55157135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6144379A JPS55157135A (en) 1979-05-21 1979-05-21 Information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6144379A JPS55157135A (en) 1979-05-21 1979-05-21 Information reader

Publications (2)

Publication Number Publication Date
JPS55157135A true JPS55157135A (en) 1980-12-06
JPS6223378B2 JPS6223378B2 (enrdf_load_stackoverflow) 1987-05-22

Family

ID=13171204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6144379A Granted JPS55157135A (en) 1979-05-21 1979-05-21 Information reader

Country Status (1)

Country Link
JP (1) JPS55157135A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127243A (ja) * 1983-01-11 1984-07-23 Matsushita Electric Ind Co Ltd 光学的記録再生装置
JPH02192042A (ja) * 1989-01-19 1990-07-27 Nec Corp 光ディスク装置
JPH0426940A (ja) * 1990-05-21 1992-01-30 Matsushita Electric Ind Co Ltd 光ディスク原盤作製装置
JPH06203398A (ja) * 1981-03-31 1994-07-22 Discovision Assoc トラッキング装置
JP2019523403A (ja) * 2016-07-29 2019-08-22 シャンハイ マイクロ エレクトロニクス イクイプメント（グループ）カンパニー リミティド 回折格子測定装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5295203A (en) * 1976-02-05 1977-08-10 Mitsubishi Electric Corp Information reproduction apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5295203A (en) * 1976-02-05 1977-08-10 Mitsubishi Electric Corp Information reproduction apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203398A (ja) * 1981-03-31 1994-07-22 Discovision Assoc トラッキング装置
JPS59127243A (ja) * 1983-01-11 1984-07-23 Matsushita Electric Ind Co Ltd 光学的記録再生装置
JPH02192042A (ja) * 1989-01-19 1990-07-27 Nec Corp 光ディスク装置
JPH0426940A (ja) * 1990-05-21 1992-01-30 Matsushita Electric Ind Co Ltd 光ディスク原盤作製装置
JP2019523403A (ja) * 2016-07-29 2019-08-22 シャンハイ マイクロ エレクトロニクス イクイプメント（グループ）カンパニー リミティド 回折格子測定装置

Also Published As

Publication number Publication date
JPS6223378B2 (enrdf_load_stackoverflow) 1987-05-22

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