JPH0568774B2 - - Google Patents

Info

Publication number
JPH0568774B2
JPH0568774B2 JP61178513A JP17851386A JPH0568774B2 JP H0568774 B2 JPH0568774 B2 JP H0568774B2 JP 61178513 A JP61178513 A JP 61178513A JP 17851386 A JP17851386 A JP 17851386A JP H0568774 B2 JPH0568774 B2 JP H0568774B2
Authority
JP
Japan
Prior art keywords
objective lens
photodetector
optical information
light
detection device
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
JP61178513A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6334745A (ja
Inventor
Nobuo Ogata
Yoshio Yoshida
Teruaki Inoe
Yasuo Nakada
Hideo Sato
Toshuki 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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP61178513A priority Critical patent/JPS6334745A/ja
Priority to EP87306575A priority patent/EP0255305B1/en
Priority to CA000542944A priority patent/CA1319194C/en
Priority to US07/078,773 priority patent/US4812638A/en
Publication of JPS6334745A publication Critical patent/JPS6334745A/ja
Publication of JPH0568774B2 publication Critical patent/JPH0568774B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP61178513A 1986-07-28 1986-07-28 光情報検出装置 Granted JPS6334745A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP61178513A JPS6334745A (ja) 1986-07-28 1986-07-28 光情報検出装置
EP87306575A EP0255305B1 (en) 1986-07-28 1987-07-24 Focusing error detecting device and method of manufacturing the same
CA000542944A CA1319194C (en) 1986-07-28 1987-07-24 Focusing error detector and optical data detecting device incorporating the focusing error detector
US07/078,773 US4812638A (en) 1986-07-28 1987-07-28 Focusing error detector and optical data detecting device incorporating the focusing error detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61178513A JPS6334745A (ja) 1986-07-28 1986-07-28 光情報検出装置

Publications (2)

Publication Number Publication Date
JPS6334745A JPS6334745A (ja) 1988-02-15
JPH0568774B2 true JPH0568774B2 (en]) 1993-09-29

Family

ID=16049786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61178513A Granted JPS6334745A (ja) 1986-07-28 1986-07-28 光情報検出装置

Country Status (1)

Country Link
JP (1) JPS6334745A (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0645903B2 (ja) * 1989-12-06 1994-06-15 新日本製鐵株式会社 プリント基板用の鋼板

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167131A (ja) * 1984-02-09 1985-08-30 Mitsubishi Electric Corp 光学式情報記録再生装置の光学機構

Also Published As

Publication number Publication date
JPS6334745A (ja) 1988-02-15

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