JPS6223378B2 - - Google Patents

Info

Publication number
JPS6223378B2
JPS6223378B2 JP54061443A JP6144379A JPS6223378B2 JP S6223378 B2 JPS6223378 B2 JP S6223378B2 JP 54061443 A JP54061443 A JP 54061443A JP 6144379 A JP6144379 A JP 6144379A JP S6223378 B2 JPS6223378 B2 JP S6223378B2
Authority
JP
Japan
Prior art keywords
light
light beams
signal
light beam
light source
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
Application number
JP54061443A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55157135A (en
Inventor
Kazuo Shigematsu
Manabu Yamamoto
Masahiro Oshima
Kiichi Kamyanagi
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 JPS55157135A (en) 1980-12-06
JPS6223378B2 true 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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414655A (en) * 1981-03-31 1983-11-08 Discovision Associates Scanning beam control system
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
CN107664481B (zh) * 2016-07-29 2019-08-23 上海微电子装备（集团）股份有限公司 光栅测量装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5920170B2 (ja) * 1976-02-05 1984-05-11 三菱電機株式会社 情報再生装置

Also Published As

Publication number Publication date
JPS55157135A (en) 1980-12-06

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