JPH051532B2 - - Google Patents

Info

Publication number
JPH051532B2
JPH051532B2 JP60100712A JP10071285A JPH051532B2 JP H051532 B2 JPH051532 B2 JP H051532B2 JP 60100712 A JP60100712 A JP 60100712A JP 10071285 A JP10071285 A JP 10071285A JP H051532 B2 JPH051532 B2 JP H051532B2
Authority
JP
Japan
Prior art keywords
light
focus
reflected
reflected light
photodetector
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
JP60100712A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61258339A (ja
Inventor
Shunji Oohara
Tomio Yoshida
Takashi Ishida
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 JP60100712A priority Critical patent/JPS61258339A/ja
Priority to US06/744,480 priority patent/US4724533A/en
Publication of JPS61258339A publication Critical patent/JPS61258339A/ja
Publication of JPH051532B2 publication Critical patent/JPH051532B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP60100712A 1984-06-15 1985-05-13 光学的記録再生装置 Granted JPS61258339A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP60100712A JPS61258339A (ja) 1985-05-13 1985-05-13 光学的記録再生装置
US06/744,480 US4724533A (en) 1984-06-15 1985-06-13 Optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60100712A JPS61258339A (ja) 1985-05-13 1985-05-13 光学的記録再生装置

Publications (2)

Publication Number Publication Date
JPS61258339A JPS61258339A (ja) 1986-11-15
JPH051532B2 true JPH051532B2 (instruction) 1993-01-08

Family

ID=14281272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60100712A Granted JPS61258339A (ja) 1984-06-15 1985-05-13 光学的記録再生装置

Country Status (1)

Country Link
JP (1) JPS61258339A (instruction)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH077518B2 (ja) * 1988-08-31 1995-01-30 松下電器産業株式会社 自動焦点調整装置
JPH0728578Y2 (ja) * 1988-09-22 1995-06-28 ソニー株式会社 光学ヘッド
US5315574A (en) * 1988-10-28 1994-05-24 Matsushita Electric Industrial Co., Ltd. Optical head with polarized beam hologram

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956234A (ja) * 1982-09-24 1984-03-31 Sony Corp 光学式再生装置
JPH07107742B2 (ja) * 1984-02-17 1995-11-15 三菱電機株式会社 光デイスクヘツドのフオーカスずれ検出装置
JPH0656673B2 (ja) * 1985-02-28 1994-07-27 キヤノン株式会社 光ピツクアツプ
JPH0690817B2 (ja) * 1985-02-28 1994-11-14 キヤノン株式会社 光ピツクアツプ

Also Published As

Publication number Publication date
JPS61258339A (ja) 1986-11-15

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term