JPS6331858B2 - - Google Patents

Info

Publication number
JPS6331858B2
JPS6331858B2 JP18068880A JP18068880A JPS6331858B2 JP S6331858 B2 JPS6331858 B2 JP S6331858B2 JP 18068880 A JP18068880 A JP 18068880A JP 18068880 A JP18068880 A JP 18068880A JP S6331858 B2 JPS6331858 B2 JP S6331858B2
Authority
JP
Japan
Prior art keywords
light
focusing
target object
optical detector
plane
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
JP18068880A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57105832A (en
Inventor
Tsuneo Hirose
Shinichi Tanaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55180688A priority Critical patent/JPS57105832A/ja
Publication of JPS57105832A publication Critical patent/JPS57105832A/ja
Publication of JPS6331858B2 publication Critical patent/JPS6331858B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP55180688A 1980-12-19 1980-12-19 Detector for optical position Granted JPS57105832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55180688A JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55180688A JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Publications (2)

Publication Number Publication Date
JPS57105832A JPS57105832A (en) 1982-07-01
JPS6331858B2 true JPS6331858B2 (en, 2012) 1988-06-27

Family

ID=16087562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55180688A Granted JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Country Status (1)

Country Link
JP (1) JPS57105832A (en, 2012)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982336U (ja) * 1982-11-24 1984-06-04 株式会社東芝 光デイスク検査装置
JPS6020025U (ja) * 1983-07-15 1985-02-12 日東光学株式会社 光デイスクの信号検出用スプリツタ−
JPS6040031U (ja) * 1983-08-25 1985-03-20 日東光学株式会社 光デイスクの信号検出用スプリツタ−
US5161139A (en) * 1989-01-06 1992-11-03 Kabushiki Kaisha Toshiba Focusing error detecting apparatus
JP3697875B2 (ja) * 1997-12-25 2005-09-21 ソニー株式会社 光学ピックアップ及び光ディスク装置

Also Published As

Publication number Publication date
JPS57105832A (en) 1982-07-01

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